Document 6bVBR9GmdNKgp2qmD0QdEvxE9

S B E S T 0 S 3ULLETIN September - October, 1962 Editor C. Z. Carroll-Porczynski PART P..RT BART PART PART PART 1. 2. 34. 56. PART 7. PART 8. PART 9-PART 10. PART 11. CONTENTS. MINING rage. ..................................................................................... "ToS ASBESTOS CEMENT. .................................. .. .. ..114 ASBESTOS TEXTILES.............................................. ..124 ASBESTOS FRICTION MATERIALS................................ 125 REINFORCED PLASTICS..................... .... ......................... 127 ASBESTOS JOINTINGS, SEALING AND COSTING COMPOSITIONS ...................................................................... 129 ELASTIC MATERIALS AND PIPES.................................130 ASBESTOS PAPER AND INSULATINGMATERIALS.. ..132 REFRACTORY FIBRES .........................................................133 MISCELLANEOUS.................................................................. 134 REVIE'V OF JOURNALS....................................................... 135 (C) Copyright - Astex Publishing Co., 1962. ASARCO ALV 0006905 asbestos bulletin 108. Part 1. MINING. CANADA. 475 QUEBEC ASBESTOS INDUSTRY: TESTING AND QUALITY CONTROL. J.P. Wiser. Can. Mining Met. Bull, June 1962, 55, No.602, pp. 403-405. General article by a milling consultant for Lake Asbestos of Quebec Ltd. 476 QUEBEC ASBESTOS INDUSTRY: MINING AND MILLING. J.L. Gartshore. Can. Mining Met. Bull. June 1962, 55, No.602, pp.400-401. General article by the mill superintendent of Canadian Johns-Manvilie Cc. Ltd., 477 GEOLOGY OF STEELE, BONIS AND SCAPA TOWNSHIPS, DISTRICT 0? COCHRANE. S.3. Lumbers, Ont. Dept. Min. Geol. Rep. No.8, Toronto, 1962, 50 pp. Mineral occurrences in this district include asbestos. 478 - AN ASBESTOS PROSPECT IN CLEVELAND. Eng.Mining J. Aug. 1962, 163, No.8, p.174. An asbestos prospect in Cleveland Twp., 7 miles south of Asbestos, is being drilled*by Bomite Copper Corp. An asbestos-bearing zone has been traced for a length of 3000 ft. with width up to 800 ft. 479 PRELIMINARY REPORT ON PORT-LA-PEROUSE-NORMAN POINT AREA (Port Karrison-Hopewell Point). New Quebec. S.M. Lee. Prelim. Re. Quebec. Dep. Nat. Resour. Geol. Surv. No.445, Quebec, 1961. General and structural geology are described. Mineral occurences include asbestos. 480 PRELIMINARY REPORT ON CHANDLER-PORT DANIEL AREA, BONAVENTURE AND GASPE-SOUTH COUNTIES. W.G. Ayrton. Prelim.Rep. Quebec Dep. Nat. Resour. Geol. Surv. No.447, Quebec, 1961. Mineral occurences include asbestos. 481 SYMPOSIUM ON CANADIAN EXPLORATION. H.H.Heustis. Can.Mining J. 1962, 83, No.8, p.50. Among the major mineral discoveries made in Canada's Pacific North west during recent years the following are listed:- ASARCO ALV 0006906 109 ASBESTOS BULLETIN. 1) Cassiar asbestos mine staked by four prospectors who sold it to Conwest Exploration Co. 2) Asbestos Southeast of Atlin, found by prospector Steve Papp. 3) Letain asbestos deposit, found by prospector Pelix Letain. 482 MURRAY MINING. Can. Mining J. 1962, 83j. No.7, p.102. Asbestos Corp. ltd., and Murray Mining Corp. Ltd., announced rec ently that they had concluded an agreement that will allow Asbestos Corp. to acquire a cne-year option, renewable for another year, on Murray's two mineral exploration licenses at Asbestos Hill, Quebec. The agreement calls for Asbestos to spend a minimum of #500,000 in the first year, and a further #500,000 in the second year, if the option is renewed, on development of the asbestos property. The programme for the first year, now under way, provides for a detailed engineering study, to arrive at a firm capital cost for construction of a dock, access roads, power plant, townsite and mine and mill facilities. The existing air strip at the property is expected to be lengthened from 3,200 ft. to 5,000 ft. Additional exploratory diamond drilling is also being planned along the strike of the current fibre zone at the property. Asbestos Hill is 32 miles South of Deception Bay in Hudson Straits. (Entire abstract). 483 PRELIMINARY REPORT ON FRASER LAKE AREA, SHEFFORD & STANSTEAD COUNTIES. P. St.-Julien. Prelim. Rep. Quebec Dep. Min. No.439, Quebec 1961. General and structural geology of the area are described with notes on copper, asbestos, Chromite and Magnetite occurences. U.S.A. 484 COALINGA ASBESTOS FIBRES. Can. Kilning J.1962, 83 No.8, p.45- ~ Description of a new asbestos mining and milling operation put into production stage early in 1962 by Coalinga Asbestos Co. Inc., in Fresco County, California. Group 7 chrysotile asbestos is extracted from zones of sheared serpentine within an ultrabasic intrusive. Various exploration techniques are discussed and mining and milling operations described. 485 MINING METHODS AND COSTS, REGAL ASBESTOS MINE. Jaquays Mining Corp. L.A. Stewart, U.S.Bur.Mines. Inf.Circ.No'. 7986, 1961. History, mining methods, etc., of the Regal Chrysotile asbestos mine, and two asbestos mills of Jaquays mining Corp., are described in detail. ASARCO ALV 0006907 asbestos BULLETIN. I 110. 486 MINING AND MILLING METHODS AND COSTS, VEHMOND ASBESTOS MINES, THE RUHEROID CO., HYDE PART, VT. E.L. Burmei- ster & I.E.Matthews. U.S. Bureau of Mines Inform. Circ. 8068 (1962). This reDort includes a description of the ore deposits, a brief his tory of'their development, an outline of methods used, and a break down of available cost figures. 487 MOUNT EDDY AND SHASTA VIEW ASBESTOS DEPOSITS,SISKIYOU COUNTY, CALIF. K.Malone, W.T.Benson & A.L.Engel. Rep. Invest. U.S.Bur.Min. 5948, 1962, 29 pp. A reconnaissance survey by the Bureau of Mines revealed asbestos fibre low in iron content and strength compared with Canadian Chrysctile asbestos. The fibres are very short and cannot be used in shingles or paper products, but might be useful for certain filler applications. A detailed description of the deposits is given. RHODESIA & NYASALAND. 488 ASBESTOS EXPORT 1961. Mineral & Trade Notes 1962, 55, No.3, P6. Production cf chrysctile asbestos in Southern Rhodesia reached a record 161,610 short tens valued 8,747,411 in 1961. Output in I960 totalled 133,963 tens valued at 7,471,405. Expert 1961: Czechcsl0vakia Poland :United Kingdom United States Other countries 10,924 tons. 2,616 tons 75,853 tons (Turner-Newall Ltd). 1,745 tons 33,516 tons UNION OF SOUTH AFRICA. 489 MINING AT MAMBA HILL. S.Afr. Min. Engng.J., Johannesburg, 72,, Dec. 15,1961, 1407. Notes on the African Chrysotile Asbestos Ltd., operations in the E. Transvaal close to the Swaziland border. 490 PRESIDENTIAL ADDRESS: MINERALS & METALS FOR SALE. D.G. Maxwell. J.South Afr.Inst.Min.Metall.Johannesburg 62 Aug.1961. South African resources and probable developments of various mater ials, including asbestos, are discussed. ASARCO ALV 0006908 rT 111 ASBESTOS BULLETIN. EXPORTS OP ASBESTOS FROM THE REPUBLIC OF SOUTH AFRICA. Mineral Trade Notes, 1962, Vo.55. No ? ?p. 7-9. Country of Destination. ______ I960_____________ ________ L96G Short . Value, SAL Short Value, R "kctts , f.o.b. tens i f.o.b. Amcsite Argentina. Australia Belgium .. Canada ... Denmark .. France ... Germany .. Italy -----o-anar. . . . . -J - Ncroccc . Nether. an De'.v Zealand enit e d Xined cm United States Yugoslavia ... Other countries 276 5,592 1,200 1,520 460 C21 1,303 2,187 2,501 75 502 7C8 1,690 27,028 16,900 502 862 12,059 255,oC2 51,495 50,743 21,038 sO,457 ~ 65,t9rJ9^%1^ 150, J-45 3,30C 23,902 30,273 7-,t25 152,458 919,581 29,583 -j % v r : 680 ' 8,667 890 : 1,2CC 737 2,149 1,563 7,238 2,621 660 225 62 3 1,291 23,021 , 14,0G1 ^AT ^v 1,651 1 65,276 = 741,305 74,356 118,296 : 1Q6J5,^4O3g7q 154,320 592,125 : 261,192 i 52,800 13,290 52,226 117,908 : 1,987,456 ' 1,548,419 : 25,900 162,717 Fetal........... ' 68,187 irysctile: Argentina ..................................... Australia ..................................... Germany .................. Italy ....................... Jaoan ............................................................. Norway Poland ....................................................... ....................................................... Portugal ........................................... Rumania ................................................. Singaocre ..................................... Stain ............................................................ United Kingdom .. Other Countries . 909 4,697 ' 2,677 : 927 262 ; 1,059 71 : 877 506 : 5,490 : 3,265 ; 3,468 . . 186,581 ------- 53,474 272,444 267,390 59,116 20,385 49,538 10,590 44,218 19,310 c.j*X31 OJur\cu\ua 61,587 171,772 57,SC2 856 4,510 3,100 1,012 774 : OIU 1,441 575 00<i t : 6,015 i 3,409 ! 1,710 6,245,598 101,768 522,211 459.036 112,297 96,511 91,237 145,801 62,552 87,969 686,268 181,468 169.037 Total 25,338............................... 1,345,824 25,094 2,717,905 [ ASARCO ALV 0006909 SSTOS BULLETIN . -------- -------- Country of Destination i I960 i 'SEortT Value , SAi tons f.o.b. j pe hue: Arrvntina............ 65 tr-T r-i ism ........ ., 5,165 Brazil .................. .: 670 Bulgaria ......... .... Canada .................. . j 2,200 f: r."1 riTOhi n .............. 4-30 : ! j 5,346 366,616 48,532 90,018 166,965 31,613 ; ' ; ! . ; Czechoslovakia . lenmark ................ ^- v`*'*r1s v* n o # ................ * .i .4 ... . j . ;....................................... Israel .................. ~ta"i v.................... . 35 675 2,734 5,036 6! 150 2GC 1 f, _/-r -4 7,3:8 ; | ' : ; ! 2,215 47,386 204,750 335,460 4 30,012 15,200 27,940 577,104 1 : i > i fTnTjpr. .i10,238............................................ Lebanon ................ . j '550 T.i-yyJ .j 1,620........................................ Motherlands ... . 3,07c ^ ` 1....................................... * . - v . x -i - 7 ^ v'l o r.n .... . i 75 932 400 ! ; i j ! i ! 624,173 28,637 ` -122,812 : 215,331 6,300, 72,552 28,100 . I.............................. 50C V'.ited Kingdom. . .1 5,652 United States . . ..'13,270 " ~r C :hor r.-H o ... countries .!J 2,4Q5567 : 38,119 1 395,747 ! 1,072,207 : 73,466 ' 176,259 ctrr'- .172,152 i 5,212,760 112 1961 _____ ! Short Value, R j tons f.o.b. |1 1* 789 ; 5,150 ' 346 2 1,265 1,030 ! 563 j 640 ; 1,326 i 5,193 6,169 , 1,100 550 ; 9,992 ! 13,700 i 800 1,690 1 2,103 ! 512 ! 1.C7C * 515 | 800 5,145 ! 11,605 627 i 3,022 i 118,384 723,138 49,477 -- 192,500 141,355 84,098 90,115 194,796 658,006 868,479 160,585 84,875 1,534,953 1,619,290 113,600 253,789 312,698 75,574 145,044 73,100 117,052 758,949 1,818,854 101,298 422,633 75,702 i10,712,642 i Canada.................. ...... Czechoslovakia .. Denmark .................. . Itaiv ....................... J,-':r,nn ....................... United Kingdom .. United States .... Other countries . 780 636 850 854 589 1,436 2,788 1,189 Total: ............ 9,122 remolite: Rhodesia - Grand Total: .... IL74 rSlO ' 58,303 92-5 ; 138,288 j 42,475 ' 1,745 j 209,727 1 61,200 : 800 1 115,200 ! 51,583 5 393 | 47,228 35,396 ! 1,768 i 200,153 j 92,605 ' 1,539 i 189,819 ! 208,189 i 3,326 i 498,186 ! 79,609 1,529 i 196,252 1 629,360 : 12,025 | 1,594,853 --22~9_ . 1 188 '^10_,_374_, 75_4 "160,680 ; 21,271,186 - j ; . j i ! i | i : ! Source: Replublic of South Africa Deptment of lanes Quarterly Inform ation Circular, Minerals, October-December 1961 - Pretoria. ASARCO ALV 0006910 UGANDA ASSISTOS BULLETIN 492 THE MINERAL RESOURCES OF UGANDA. J.W.Barnes, Bull. Geol. Surv.Uganda,No.4, Entebbe 1961. Mineral resources of Uganda, known but not yet worked, include asbestos. CHINA. 493 PRINCIPAL FEATURES OF ASBESTOS DEPOSITS AND THEIR GENESIS. Pen Sei. Dishi lunping, Geol. Rev. 1959 > 19, Nc.il, 497-503, 491 (in Chinese). PHILIPPINES. c RECOVERY OF ASSnSIOS FROM ZAMBALE3 <k rAI-GASINAR Cr.AS. R.B. Quiche, L.C. Pedrcn & A.S. Malicsi. Rep. Invest. Philipp. Bur. Min. No.2c, Manile, Ncv.1950. -,c-3ts ev.pleying both dry and wet methods demonstrated that V-> C. TT cf chrysetile fibre araces are recoverable at reasonable Spinning grade was recovered to seme extent. Recovery cf recLIT.T? L .a. C C lines at nign yields was a_sc asm or.cTU v_ pp. ->rC..nsa. i o: , r , -Cc ,".cy`,..r'JpUr)ii f C 7x?pCVv/ * OLA ) 1962, Ric de Janeiro. According to the local press, a pilot plant was constructed in early 1932 to prccess asbestos from deposits discovered in Batalha, State cf _-.la.gcus. AUSTRALIA. -Oc GEOLOGY & MINERAL RESOURCES OF SOUTHERN EYES PENINSULA. R.Z.Johns. Bull. Gec-i.Surv. S.Austr.No. 37,Adelaide 1961. Economic mineral deposits are confined tc the Archaesn belts and include, inter alia, asbestos. NEW ZEALAND. 497 GOLDEN BAY. SHEET L/, GEOLOGICAL MAP OF NEW ZEALAND, SCALE 1:250,000. Wellington, N.Z., Geol. Surv. August, 1961. Asbestos fibre is among minerals occuring in this district. ASARCO ALV 0006911 I ASBESTOS BULLSTIN 114 BRITISH BORNEO. 498 THE GEOLOGY AND MINERAL RESOURCES OR THE BANGGI ISLAND AND SAGUT RIVER AREA, N.BORNEO. R.A.M.Wilson, Mem. Geel.Surv. Brit.3ornec, 15, Kuching, 1951. Economically, the results of the survey were disappointing, although chromite float and short-fibre chrysotile asbestos were found. YUGOSLAVIA. 00 ASBESTOS MINE OF RASKA TO BE IMPROVED. Gummi Asbest Hur.ststoffe, June 1952, If. No.6, p.577. v.'ith an expenditure of 3 million dinars the asbestos mine of Raska, S:uxh of Hraljevo (Serbia), is to be modernized, so that the rcini;:r of asbestos can bo increased eightfold. Planned for the fut ure is a plant for the production of asbestos cement. _ -L w' 5:: - THE GEOLOGY AND BilNEEAL RESOURCES 0? THE AGROSAKROTIRI AREA. BART 1. THE AGR03-ArSj.CN AREA by L.M. Bear. PART 2. THE APSICN AKPETIRI AREA by S.'.V.Morel. Merc.Geol. Surv.Cyprus No.7, Nicosia, I960. General, structural and economic geology are given. Asbestos occurs in both areas. FINLAND. -01 CLASSIFICATION OF FINISH ANTHOPHYLLITE ASBESTOS FIBRES. Asbestos June 1962, 4-3, No. 12, p.12. An explanation of the meaning of the letters and numbers used in de-sicnatinc crudes of Finish asbestos. GREECE 502 REPORT ON THE GREEK MINERAL INDUSTRY. The Mining Journ. July 6th, 1962, p.7. Minerals which recent Greek Government report considers to be worth exploring includes asbestos. PART 2. ASBESTOS CEMENT. 503 ASBESTOS CEMENT PIPE. Chera.Eng.July 23,1962, 69, No.15 p.88. News note about epoxy resin lined a-c pipe for corrosive liquids, available from Johns-Manvilie Co. ASARCO ALV 0006912 B Ox. - i 115 / `''/'at v'' i~ A- c 7 P- ^ V-- ' I w ASBESTOS BULLETIN METHOD of intensifying the hardening process of asbestos-cement T. M. Berkovitch, cand. of techn. sc. 504. Translated by Astex Publishing Co. An increased degree of hydration during the hardening period of Portland cement is a most important factor in accelerating the asbesmos-cement manufacturing process. The amount of water in asbestos-cement during the hardening process must ensure the max imum possible chemical interaction between the cement and the water, {2y': of the dry cement originally used). It must also ensure the -.vetting of the highly dispersed hydration formations and filling the cement gel's micro pores (20f). Furthermore, cart of the water is retained by the chrysotile asbestos, because its individual fibres are of tubular structure. Thus, to ensure complete hydration, the water-cement ratio during the hardening process cf asbestos-cement, (disregarding possible evaporation of moisture), must not be less than 0.5 - 0.6. This is proved by investigations (1) on asbestos-cement samples with 7:/C = 0.24; Q.36r 0.45 and 0.79, prepared from laboratory ground Foreland cement. Mineraiogical composition (inc>)- of the clinker was : CtS - 5^.9; C?3 - 20.0; Ca3Al - 4.8; C4AF - 15.4; Gypsum content (SO:) - 1.57c, specific surface area -'3160 cm2/gr. The degree of hydration of the samples, which were hardened in a hermetically sealed space was determined (2) after 1, 3, 7, 10, 14 and 26 days, by the amount of the unovaporated water (samples baked at 1C00C) and the unhydrated remains C3S + - C2S, using ORS - 50 I setting, equipped with a sc-intellation counter, registering changes in the absolute intensity cf the diffractions! maximum from d = 2.7cA. As can be seen from curves (Fig.l), an ixtero-ase of the W/C in limits from 0.24 to 0.73 resulted in a ccnsidurably higher hydration speed, particularly as the process proceeded. The hydration (chemically combined) and the gel waters (water saturation of the' chrysotile asbestos fibrils, apparently, takes place mainly in the process of its wet opening) are supplied from the moisture, which fills the capillars of the asbestos-cement substance. It ought to be taken into account that the hetero geneous hydration reactions can only take place when there is an uninterrupted reverse diffusion of the reaction products into the capillar1/ spaces, which are filled with water. Consequently, to I maintain the required water-cement rates in the hardening asbestoscement, it is necessary to fill its capillars with water. However, the technology of the present asbestos-Portland cement manufacturing process does not ensure the conditions for complete hydration of the Portland cement for the following reasons :- L ASARCO ALV 0006913 ASBESTOS bulletin 116 X) Owing to the unavoidable vacuum drainage of the asbestos-Portland cement film and the following further compacting by the forming bowl of the sheet making machine, the half-finished product is subjected to elastic deformations with the consequ ence, that part of the capillars (15 - 20%) are filled with air instead of water : 2) with increased compacting of the green sheets their moisture content drops to 25?a and'the V//C ratio of the freshly formed sheets is not over 0.4 ; 3) -the hardening process of the half-finished product leads to a further self draying as a result of evaporation and hydration of the cement. 'Evaporation of the moisture is particularly high in. "warm" stockrooms with a relative humidity under 80$>. Tver at a higher humidity the big pores cf the asbestos-cement .meets do lose water by evaporation. :.z a result the semi-finished asbestos-cement, which is now transferee for the final hardening to the stock, where it has to up not less than 40 - 50% of its standard strength, now emrains moisture which is not sufficient for effective hydration nr.a hardening cf the cement. For this reason full advantage is net taken of the binder's activity (les us remember that the strength of the cement is determined after being submerged in water; or of the compacting effect cf the half-finished product on the sheet making machines. All this indicates a necessity to increase the water content in the material during its hardening process. As the increase of the Y,'/C ratio in freshly formed sheets is undesirable, (the porosity increases with a consequent lowering of strength cf the matured goods), additional water must bo supplied to the set semifinished material during its hardening process. To this principle corres ponds the combined heat-moisture treatment of asbestos-cement wh-.re the hardening of the semifinished product, after a short steaming, takes place in warm water (6 - 24 hours). This allows for shortening cf the maturing period and at the same time gives products of improved quality. However, to harden the formed sheets in water is a time consuming process and requires recon struction of the existing factories, thus creating difficulties for the introduction cf this combined treatment into the manufac turing practice, and also the use of conveyors for this purpose is prohibited. At the same time, the asbestos-cement industry faces the problem of producing asbestos-cement of improved strength in accordance with the Standard 378 - 60 without delay. Taking this into consideration v/c suggested a short term addit ional wetting (water saturation) cf the steamed semi-finished product, which would increase the degree of hydration while the asbestos-cement is kept in the warm stockrooms, thus allowing a shortening of the total maturing period and an improvement in the quality. ASARCO ALV 0006914 117 ASBESTOS BULLETIN Experiments to investigate thu additional short-term wetting of the semi-finished asbestos-cement products were carried out by Nil Asbestcement (Scientific -Research Institute for asbestoscement) in 1961 at the asbestos-cement factories in Lushanbirsk, Bryansk and Kapsk. The Portland cements used for these experiments, as can be seen from Table 1, varied in their chemico-mineralogical composition and activity. The manufacturing processes of the semi-finished product were kept in line with those required by the "Technolog ical Chart of I960" and were selected bearing in mind the practice of individual factories (Table 2). Changes in moisture content of the semi-finished product (from the dry weight of the sample) during the hardening process and ho degree of water saturation, which equals -- 100# (w - water absorption, v - water content) are shown in Table 3. \ 4 A.: can be seen from the data in this table, the degree cf water sac '.racier* cf the semi-finished product after steaming is approx. 7C>. Luring further hardening cf the sheets in warm stock rooms at Bryansk and Dushanbinsk factories (at a relative humidity not ever c-3 - 85#) the degree of water saturation dropped to 40 - 50#. Tc a lower degree self drying of the semi-finished product was ccsorvc-d at Kapsk factory, where the relative humidity in the warm stockroom was kept at 95#* To determine the optimum pc-ricd cf water saturation for the steamed semi-finished product- "he kinetics of its water saturation were studied by submerging in V: -.m water for 3, 5, 10 and 15 min. The results of experiments (Pig.2) show that after 10 min. the speed of water saturation decreases ; 15 min. give moisture increase cf 5 - 6 absolute percents, or approx. 30 relative ones (for a set semi-finished product). The degree of saturation reaches 90 - 95# ana these conditions must be regarded as the optimum ones. Luring further storing time in warm stockrooms, the additionally weeded semi-finished product showed higher water content and also ccs'ce-spondingly higher degree cf saturation, though the relative increase cf these figures, as a rule, was lower. Lr.c furtner hardening of a steamed and saturated semi-finished prcu'.ct is considerably accelerated and in 7 - 10 days, as the . figures cf the Table 3 and Eig. 3 show, the increase of strength equals approx. 2# ( or approx. 3 kg/cm^) for each percent (absolute) I of the additional wetting of the semi-finished product (15 rain, saturation of the semi-finished product ensures an increase of strength up to 10 - 15# in 7 days). The same effect was also observed when hardening of the semi-finished product took place under unfavourable conditions (at low temperature), as proved by j t 1experiments carried out by K.M.Bikova at Belgorod asbestos-cement factory. J- -- ' ( ASARCO ALV 0006915 c d j.: A,^ater ASARCO ALV 0006916 TABLE 0 .6 asbestos bulletin CO >5 a CM CP 73 O -H 00 \ to OJ O to Mp ! CL CO >5 cz En o .. O r---. 1--1 CO es Cr<-.' rj OZ o *" r--"\( pa 6H >> t". O 1M*-01 CO OJ o o to >; fen C O EH o O r~i -h 'o c-- tO tA rt tCHO 6O-1 ^ VO CJ 1 C\J ITN VO rO 0J 0- OJ CO rO in m o "st OroJ 0^J 0rnJ co cn 1 CJ ___( o oo , ,-v-\ GO i--! r\j 0,, OJ r*--4 cc c~rJ VO d t\j Cj CM XCJ CSCLOP- JZ CCP -SrH CO COO crt too c s Ph K C Io O CP OC5 t(f-ii "<+ o ro o CO OJ o CrOo O Ph >H O O S Eh SO fc: P<H o vo r-H CO cc cn in 11 t--i VO rO r-i H iH O oo rM *=J- i--l i--i 0J 0J 0J OJ ro ITN 0J ITS 0r0o CO H Jid ja m crt c aJ CO CO pp s Fh crt Mm -p CO 0) O CP CP \ jh x; & Ph cn o ^ CT\ LTn ^=i" ICO OJ 0J 0J CP O * OJ rO <J\ (P -P C! o U 3 V. >w a! VO rO CO nO no -P co cp rC Pt O OOX O S 'cHp >flOPQ VO ffl ir\ 0J Lf\ .id So rl i-( Ph Eh s H T3 S -P 0)\ H G) -P g a 0) hCT.S CO / \ M o G> r* cB r* o CM 5 C-t o <qs0 O r"i Sh Cm C to C C O o. Po X CM C H-3 r_-i p sa x cp i-i CP -*-3 <5. .a c <s X o Eh < o fi-VQ S Tf d CP <--f FQ tf'' m m o p CO vo cp pm ^r3a < in PM pH >H o pc o a eh So <a3 <<3 S Ph tn no njCO coo CJ ^5* o <3* GrO o CM o lf\ cp OJ OJ LP\ 'T c-- O' CO LO LT\ * VO ^r rH r-H (~i o ini in rHIi Cro ti oOc cH O CM Oin w 11i o irno o m in o CM 0J OJ ll1 Ooo O CO o in o in 1 ir\ l in CM 0J Acoi H m CO c 4a Ctf CO m >s cu 3 p crt pq K 120 ASARCO ALV 0006917 14 D ays T e sts c a r r ie d out on th e 3 0 th day. CO C ro CO invo 1 pH (--1 G -p 00 ; a C--CO H** TGiD-i !iI c:G , i in pH pH 1 H u} ! rr >3 : c3 O CO m 1 rH O 3i pH pH -P II I I CO rO CM LT\ LOiCO I r-i H H'd- t*s-J- I ICC rH rH i-P O to ; '< ~L~ -gH ! C- Cc-c- "d- 'H- I I CO0O ** rOCO CO CrH rH 00 C-r~l IOC-- rH i--I s C\J H CO ro LPiLPv | rH rH .AS33ST0S BULLETIN LPv m \ c: C- t-j ! rJ ! i-- i O') F ( ~ 1 r^ *, `~ i CJ cc CMCC nm m in C\J X.CO Vc CO o v /" rH rH C ht C\J mo mo r--. m /*n r*^ * - OJ r*0 rH -3* H m in coco |-!CO -3* nr r*"' . r* --s m pp o P' oco pr. O' PH c cc CJ CO VTT c-oo rwA*f rP i--i c-> rH VC VC c-co oc\ cn m. rH orH CTv nr l--i <"C CO n CO O'. pH rn "j P=3| *_ ,w ---- r-i C IT r-i rH ci rH m nr rH C-- m O i--i ph pH oo * c c* r-i CO r--i cn m pH Oj mo * in CO C\J 3 -p V' * c t --1 -U> CJ "3* 00 m r~iH pH CO CO oo o CM o H CO rH o rH rH pH vo m * oco CM CM O'! m tn CO OJ c o to o . G P `Pi -H-VO CM o Hi* Hi* o o C-CM in o i G e s CD '-P rt rH C"~ i CM CM CO CT\ CO rH O' CO CO CM CM CO C-CM H7 CO CM CO rH -F=> C*H O CH < +S CO CoO o CO 0o) rH H CD +> C>D o0 H5 > TJ 3 H 2 rH G'tK MW roH += cd roH p cd i M O 0) ("( +3 'H ? CQ pH 43 <D m rH ttO 43 0 C V O 3 O -H G -3 G TS <C w m -h d> rH P rH Q> H 0 C += -p H -p -p 0ra) oto CD C3 CO rH .. +3 +3 0 0 CO CO P -P 0 0 + +=> CQ m L ,0 0 0) ci ? % X. CO o O=S 2 Oi 43 0) 3 SH oc HG M CIS CD <JDH ?H OG GM M GCO CD CD cti c3 & % Q> Q) mc>Ut3i 2O oH Go G HH t--Gf (DO) ert cS CD q CQ G. O fcCd flS oG oG wG tG-| ASARCO ALV 0006918 asbestos bulletin 122 Experiments of 0.A.Isayev and Z.F.Kruno at Karagondinsk and Krasnoyarsk factories proved that, when moulding is carried out without templets, the short-term additional wetting of the semi finished product (initial strength 35 - 40 kg/cm2) and the long term combined "Keat-moisture" treatment produce equal results. Thus a simple operation hc-lps to increase the strength of the material by 15 - 20 kg/cm2 ana turn out asbestos-cement of the 160 grade. The short-term additional wetting of the semi-finished product allows full advantage to be taken of the cement's reactivity and also of the sheet's~higher density obtained furing the forming rrocess on the sheet making machine. This results in shorter manuring periods and improved, quality of asbestos-cement. ;C5 PATENT 3,027,294. PRODUCTION REPELLENT STOS-CE'MENT PP.ODU !!. P.5.Betti R.Eckert. itubercid Cc. ) The formed asbestos-cement products are coated with thermoplastic acrylic copolymers after partial drying. Further drying and auto claving cure xhe clastic coating end the asbesxcs cement. V a. *i G GAG rIPELIIoS 3Y GLUING. A.A.Nikolaev. Strc . Trubaprcvadov 1962, 7, No.6, 23-4-. Experiments cn ioining low-pressure gas pipelines (made of metal or asbestos-cement; by glueing have been carried out at Fastov (Ukr). For asbestos-cement pipes, xhc- glue consisted of 100 parts of an epoxy resin, 40 parts 'of ground and screened sand, 15 parts of dicutyl phthalate and 10 parts of hexamethyleneaianine. The pipes are joined face-to-face, and the joint is protected hy four or* five- windings of a gauze soaked with glue. The joints which were hydraulically tested at a pressure- of 12 kg/cm , did not show any leakage. xt is claimed that this method of joining is superior to the conventional methods in several respects. 507 INVESTIGATION AND DEVELOPMENT OF JOINTS AND RESIN PACK INGS FOR ASBESTOS CEMENT WATER-PIPELINES. B.M.Gorelik, A.V.Ratner, M.F.Bulchina & V.I.Kapshtyk. Kauchuk i Resina, 1962, 21, No.7, 19-23. Dimensional requirements, admissible pressures and effects of low temperatures, ageing, use of polymerisation acceleration, etc., on the resin packings for water-pipelines made of asbestos-cement are discussed in detail. ASARCO ALV 0006919 123 AS3EST0S BULLETIN 508 BELGIAN PATENT 614,990. ASBESTOS-CEMENT PIPES. Comp, de Pont-a-Mousson. A thin layer of asbestos cement slurry is wound onto a rotating mandrel made cf a synthetic organic material, such as P.V.C., the coated mandrel is placed in a curing oven and, after curing, the tube is rc-movea from the oven. Suitable apparatus comprises a station for winding the asbestos cement paste onto the mandrel, an even, in which the temperature decreases from the inlet to the outlet, and an endless conveyor for the transport of the coated mandrel. 509 AUTOMATIZATION OP THE PREPARATION CF ASBESTOS CEMENT MASSES USING APPARATUS KEP.12U. S.S.Stanin & V.A. Sumin. Stroit. Mat. 1962, 8, No.7, p.26. Arrangements for an automatic control cf rollers and Hollanders is described using the electro-pneumatic apparatus KEP-12U produced by the "Fizpribcr" works (P/Ioscow). No supporting relays are needed. The arrangement is versatile, permitting various modifi cations of the orc-cess. (The apparatus KEP-12U is not described in this article). 510 ASBESTOS CEMENT SHEETS COATED V/ITK SYNTHETIC RESINS. G.Y.Aleksandrove & r.N. Sokolov. Stroit. Mat. 1962, 8, No.7, pp.11-12. Decorative asbestos cement sheets are coated with fused resins; in one operation, a coating of a thickness of up to 3-5 mm. can be produced. Resins having a low fusing point are used, such as epoxide resins E-33 and E-4.4, usually with fillers, such as chalk, ground sand,_ white cement, talc and various pigments. For the application of the coating, the asbestos cement sheets were heated to 150-160C, and the resins were melted at 100-160cC. For hardening, phthalic anhydride, or phenol-'or cresol-formaldehyde resins were used. 511 S. AFRICAN PATENT R61/770 FIBROUS CEMENT ARTICLE. Turner's -"-sbestos Products (Pty) Ltd. An article made of fibrous cement is provided with a roughened decorative surface finish by blasting the surface with granular particles while the surface is still not cured and subsequently allowing the article to cure. ASARCO ALV 0006920 ASBESTOS BULLETIN 124 5lg THE COEFFICIENTS OF HEAT-& TEMPERATURE-CONDUCTIVITY OF ASBESTOS CEMENT. I. Chernyaev, Strcit. Mat. 1962, 8, No.6, pp.33-34. The Coefficients cf heat- and temperature-conductivity depend on structural footers, temperature and moisture content of asbestos cement. In the experiments described in this article, these co efficients were determined by the heat-impulse method u.3ing a lin ear heater. The asbestos cement samples contained 16$ cf asbestos (17 and V grade, semi-rigid) and 84$ of Portland cement (marie 400); the specific gravity was from 1285 to 1670 kg/m . It has been found that the coefficient cf heat conductivity increases more than tv,'ice when the moisture content increases from zero to the saturation state (35 vol.$). The coefficient cf temperature conductivity increases at first or.?, then decreases which can be explained by phase changes cf the liquid. The experimental results are tabulated and corres ponding diagrams are given. nJ.C/'.Ti--.rji.it.iients, 1561, No. 5, FOE WALLS & CEILINC-S o_i laminated wail and ceiling panels are produced by St emit S.p.A. nGeneva) in several varieties. They comprise external plates made cf asbestc s-oement and, interspersed between them, layers cf an insulating material, such as expanded polystyrene, expanded ccrk (treated v; ith pesticides and flame-retardants) cr "Acalorit" (a rigid expand ed material consisting cf asbestos and silicates), The asbestes-oe:moot plates used include "Sternit CO", "Glasol", (Having colour glaze; and "Or.dula Sternit" (corrugated). A full technical speci fication of these panels and a detailed description cf their uses 1 n building are given. CEMENT. R. Teschner. Silikat Technik, 1962, , p.137. Production methods and applications of asbestos cement are briefly reviewed. PART 3. 515 ASBESTOS TEXTILES. AGLZ3TQ S-PAPEE CORD: MANUFACTURE & USES. R.P.Grushman & A.G.Lashina. Leningrad, 1962, 8p. (Leningrdskii Dun nauehno-tekh-nicheskom propagandy. Obmen peredovym cpyton. Seriia: Stmitel *Naia promyshlennost1, no.l) (Monthly Index of Russian Accessions June 1962, 15, No.3, p.691. ASARCO ALV 0006921 ASBESTOS BULLETIN 516 GENERAL TECHNOLOGY OF ASBESTOS FIBRE SPINNING. A. S. Poiarkcv. Moskva, Izd-vonauchno-tekhn. Lit-ry RSFSR, 1551. 256p. (Monthly index of Russian Accessions 15, No.3, 691, June, 1962). 517 U.G. PATENT 3,042,975. FIBRE OPENING AND CLEANING. Irvin Barnett, (to Johns-Kanville Corp.). Apparatus for opening fibrous masses and removing dust consisting of a horizontal tube 'vith a vaned center shaft. FHINCH PATENT 1,299,806. rvn-7 A /T*.T!7>Tm X X-'--'A I J. 0? ASBESTOS FIBRES, ITT v ~ -i -f'avivioyiVa Asbestos fibres or asbestos products containing organic materials which cannot be removed by washing with water, are treated with aqusji; us sorutions cz a. Li metal silicates or chosnhate. =; 1 c JAPANESE PATENT 7139/62. FLAMEPROOF FIBROUS SHEET MATERIAL. ;-.tjimcri Kcgyo Co. sterial which is particularly suitable for ceilings, is rrc: ed by cordir.s a mixture of a fibrous material and an ad- 73. mien ores 3 mm itt and heating until the moisture content is reduced to 10-4Of*. A number of such sheets are stacked, tr^ecc'j fid dried by heating to form a laminate. In an example, of a fibrous materiel (a 5;i mixture of slag wool and asbestos) is dispersed ir. 71.5 litres cf an adhesive solution (1 part cf 70;- phenol resin in 30 carts cf water) and carded into 10 mm thick sheets, the water content of which is reduced to 40 by pressing and then, to 20?= by heating at 50C for 5 hours. Four of these sheets, new 5 mm thick, are stacked, pressed to reduce the total thickness by half, and dried at about 160C for 15 minutes. 520 BRITISH PATENT 8-98,356. HEAT RESISTANT FIBROUS PRODUCTS OF ALUMINIUM SILICATE FIBRES AND ASBESTOS CARRIER FIBRES. Carborundum Go. Several interchanging layers of aluminium-silicate fibres and asbestos are ceraed and converted into yarn on standard asbestos yarn making equipment. Higher heat resistance is claimed for such composite yarns. 521 ROCKET MOTOR LINERS. Mat. in Design Engn. May 1962, p.188. The two new materials from Taylor Fibre Co., Advanced Materials Div., Valley Forge, Pa., consist of a nylon-asbestos base impreg nated with proprietary phenolic resins. They can be used at ASARCO ALV 0006922 I asbestos bulletin. 126 temperatures ud to 5000^F. Potential uses indues rocket motor liners, exhaust cones and other structural parts in rockets and space vehicles. Tayloron 5031 is basically a matt material, a i-in. thick specimen of the material shows a temperature rise of 400F on the cold side 80 to 90 sec. after exposure to 5000OF. Burn-through occurs ISO to 170 sec. after exposure t o a hot flame, Tayloron 5033 is a phenolic-impregnated nylon-asbesi os cloth that is sold a? ta^es and fabrics. The fabrics can be used as a base material in filament wound structures. Beth materials are sold in pre-impregnated as well as in molded forms. FRICTION MATERIALS. v*P T T: rrcd.Hr.g. , July 23? 19?2 3^3; No. 15? cz o2-65 tl cz np.Q r* - Ct vT 3 3 r\ "0osrci6s oz Iho nsxsrisls. The text d-secribes lev; t;. aoply zhazi *to Indus sria: :lutch--.s and brakes. ' - '' Trlz. ..A35 JcLD Ti;." TT-hUE' FROEUCTIOE C? FRICTIONAL ASBESTOS ARTICLES. V.r.Shitikev cz S.G.Otchinnikcv. Kauchuk i Resina. 1952. 21, No.7, 35-37. -u " v-._ ene latexr.O-r'CPTf.ro (mark --IT-60) when introduced intc the mass used in the rreduction ci ricticnal asbestos articles. cceaurates = causinn : lot tins' of the mass: and hence, crcwong- irg the preparation process. It has been found that this efiect can be eliminated by adding to the Hollander sodium pyrophosphate which forms insoluble salts with magnesium and calcium cations present in the mass and hence, reduces the ccaguiative effects of these cations on the latex. THE DEVELOPMENT 01 HE PRODUCTION OF ARTICLES URING TH LAST FOUR YEARS. i Resina, 1952, 21 No.5, 1--2. HICAL ASBESTOS L.3ak.Kauchuk The total production of technical asbestos articles in U.S.S.R. increased from 1958 to 1961 by 44.2^ (the increase in more impor tant branches was as follows . brake shoes and linings, 41.9fj clutch discs 49.2?.-, asbestos fabrics 79*7#, "Paronite" sheets 29-470- In order to further increase the production it is planned to introduce a rotary line for the manufacture of clutch discs, a new dry-method for the preparation of frictional masses (without using benzene as a solvent), a continuous production of relied frictional bands with a shortened vulcanisation process, etc. It is also necessary to increase heat-resistance and service life of frictional and packing asbestos based materials. ASARCO ALV 0006923 i -,27 AS3EST0S BULLETIN i i 525 I AN ANTIFRICTION TAPE. Mat.in Design Eng. June 1962, p.172. I An anti-friction tape has a 10-mil backing of TPE and an electrical i i !I grade silicone rubber adhesive. The taoe, called No.424 and available from Permacel, New Brunswick, N.J., is recommended for lining chutes and rails carrying lumpy and sticky powders, parts, boxes and packages. The pressure-sensitive tape can also be I used for insulating coils and transformers. FART c ASBESTOS-REINFORCED PLASTICS. 526- A ITE'7 GROUP 0? INORGANIC, FNGSPH0R0US-3EARING RESINS. Product Eng., July 23, 1952, _33, No.15, p.46. Per struc'.aral apolicaticns where high heat resistance end low thermal conductivity are reouirod. Albright & 7/i is on (Afg) Ltd. , has a new crouo cf ir.crgmic, phosphcrcus-bearing resins. They Peek premising", too for brake- linings, electrical insulating materials, surface coatings and adhesives. "Asbestos Pelt laminates made with the new resins, A & says, shew flexural strengths in the 20,000 to 25,000-esi range and will retain ever 5 Of- cf their strength after 50hr. at 930F or IOC hr. -r. The resir.s can be reinforced with mica, alumina, ana fluegas dust to produce moulding compositions. The materials are still relatively expensive.. 3*30 to ^4.CO per kg. But prices are exoectee to come down as production increases, and inexpensive fillers can be used". 527 CRCCIDOLITE FIBRE-REINFCRCE: T. ' '.mj. Tj.Cacu: > J . xiU^US t , 1962, 18, IT o. . p.633. \ ...cccrding tc recent tests, Crecidolite asbestos fibre, a 90dium i ferrose silicate which occurs mainly in South Africa has displayed ultimate tensile strengths of approximately 500,COO Ib./sa.in. } 3 This material has also shown good bond strength and chemical resistance when incorporated into a thermosetting resin matrix. i Polyester non-directicnal folt laminates disolayed respective flexural and tensile strengths of 30,000 and 40,000 psi. (.entire abstract.) 528 GERMAN ?'TENT 1,134,170. COMPOSITION FOR THE PRODUCTION OF PACKING INSERTIONS. 7. R. Grace & Co. Tightening insertion inside a metal bottle cap is made from a cellular mass of Plastiscl (100 parts of vinyl resin and 60 parts of a plasticiser), expanded by means of a blowing agent. It contains additives, such as lubricants, fillers and stabilisers. Suitable fillers include asbestos. LV ASARCO ALV 0006924 r asbestos bulletin 128 529 ASBESTOS IN FREMIXED POLYESEER MOULDING PREPARATIONS. R.I.Grouch & J.-J.Thomas. Gummi-Asbest-Kunststoffe, 1962, 15, No.8, 718. 720., 740. Asbestos has recently gained access to the domain of reinforced rolyestc-rs held til?, now exclusively by glass fibres. Asbestos as a reinforcing agent for polyesters can be used alone or in admixture with ether fibres. ".g. grass fibres or sisal. Chrysotile asbestos especially suitable for this purpose is marketed by Jchns-Mnnviile Ccrpn., under the trade name Plastibest 20. The ::recorati on, properties and aoplinations of polyester resins reinforced with !Ir.stitest 20 alone cr in combination with-other fibres ore described in '"etail. - w-.-.o Tl!Z VJAIITV ^\_7_T .1 .--. .A1 rV.-TjjJT. ---T--^* ll `JTAPJii.r'---V-rI* --r'inU? iPHTAM I A . Sgnr 0v. r 1&sx i oh. lias sy, t^ w C~ t i nc*. T C. V- p of a.nthcchilli asoestos enrys- exile asbestos 'nd the r.r.osetting resins) was subjected to the of a 222 hydrochloric acid solution for five years, and of jog 8Oh sulohurio acid for one year. he first case, in weight of im:or` `Kan 1Z: 'V'-.s cbscr'vsd. Tli 3`t2?si^^"Ch was reduced fr; : 5C kg/cm- y, jOO '-.nd 200 kg/cm- respectively; ..he reas the im oy v>orp-rv' c *,'1 i^c An V'rm kg. cm/cm- tc 2.' end 2.2 kg.cm/. oectivelv. 521 PEINFCRCLD PCIYPROPYLZrE MAS HIGI RIGIDITY. Mat. in Design Eng., August- 1962 5_5~ No. 2, pp.lAl-142. News note about a polypropylene moulding resin reinforced with asbestos fibre being marketed by Union Carbide Plastics Co., as Bakelite JIDDA-4400. 522 VERSATILE LAMINATES. Rtilko & Mintex. Asbestos reinforced laminates developed by the above company are designed to replace conventional metals for heavy duty work as bearings; brushes, rugging plates and for use in ether difficult situations where lubrication, chemical reaction, or wide tempera ture ranges cause problems. Further information can be obtained from Railko Ltd., Treadway Works, Loudwater, High Wycombe, 3ucks. ASARCO ALV 0006925 129 ASBESTOS BULLETIN BAHT 6 ASBESTOS PACKING- SEALING & COATING COMPOSITIONS 533 A NEW HATZRIA.L FOR STUFFING BOX BACKINGS. Werkstoffe und Korrosior., 1952, 13, No. 5? p.335* Packings made of asbestos fabric impregnated with "Teflon" (Du Pont de Nemours) were used in a condensate-recycling pump for six years without any maintenance: no leakage was observed. Conven tional packings, which were used before, had to be coated (with fat and graphite) five to six times per year, and exchanged every year. 53A MB''-' ACID-RESISTANT VALVE PACKINGS. ' N.T.Dodcnov; Vestn. Tekhn. i eken.inform. X.-I.Inst.Tekhn-ekcn.issled.Gos. Xcm-Fn Scv.Uin. 3SSR po Ilhimu, 1951, No. 12, _re cer.evicur cz cnrvscti.-e a.nc blue asbestos valve packings in 'cid media has been studied. '.ZZ 1IATERI--.I3 "iTH "'IIS POSSIBLE X 1` 'RIAL Air" STICKS. E.A.:.I.Bradford. Kunsosooffe/ r 1? S' .cs, 19:2 5, No.1, 2^-28. "Flucn", polymerised tetraflucroethylene, and "Idelinex", coiyethylene-tetrophthalate (booh produced by I.C.I. Ltd.) are described. :f asbestos packings impregnated with "Flucn" are given. A s b e s t os -': ..':e i r. e x " laminates are mentioned. 335 ' BELGIAN PATENT 513,370. ADHESIVE PASTE. Zellstoff-Fabrik "aldhcf. An adhesive paste for floor, wall and ceiling coatings is prepared by mixing dry material obtained from sulphite waste liquor with 40-150;". of cement ( b^-sed on the weight of the dry material) ; fillers and other ingredients may also be added. In an example, ICO parts Portland cement, 102 parts asbestos powder, 5 Darts bentonite and 3 parts calcium stearate are mixed with 190 parts of pc-wdered dry material from sulphite waste liquor* for use, 200 certs of water are added to the mixture. The paste has good adherence to the substrate irrespective of its moisture content. The solidification is rapid. 537 BRITISH PATENT 854,437. EPOXY RESIN ADHESIVE. V/.R.Grace & Co. The adhesive composition useful for bonding metal to metal, and which produces a seal resistant to extreme variation in temper ature contains 150 parts of short asbestos fibres. [J ASARCO ALV 0006926 ASBESTOS BULLET III 130 538 JAPANESE PATENT 8554/62. SEALING MATERIAL FOR CASTING PROCESSES. I.I. Yoshimatsu. A bituminous material is dissolved in a non-volatile oil, such as oaraffin oil, and a non-combustible material, such as asbestos, is added. The mixture is kneaded with a refractory material, such as eraohite, mica, perlite or talc. The paste obtained is formed ir.tc a sealinc cord or tape. --TT2T}Trr3_ SBESTCS GASKETS ESIST OIL, GASOLINE. Mat. in Design !ng. June, 1962, :.158. r.eet cacaing matenau as design d to use as gaskets that will v r C~ S`"I r* O' 1 , -- 55* 0^ ^ s '"inci, 3. r1 matic hydrocarbons. Hade by eater addition croces?, the mao rial is homogeneous blend of estcs fibres and NBR (nitrile') abbor latex. material, designated Best-Ink is marketed by Keasbey & tison Cc., Ambler, Pa. r;-" 7 PLASTIC BUILDING MATERIALS r ACr> 1^-. J t* rvls *" i c -2 "* W 0? MATERIALS AND o.i.. i us hev &. Ya. S. Gri s hk e - No.7, n : 3-6. iar.ts for the .production of 4 VI^ D'Q articles from rlastmasses are described. Included are two automatic lines for the production of asbestcs-resin (polyvinylihlcride) flooring plates. One of the lines is in one ration at :i3clshevikM works in Kiev; starting materials for the production of flooring plates are : Polyvinylchloride resin PF-4 (18/2), Co umarone resin (A--), dibivtyl pkthalate ana V. 1.3. F. (esters of higher iscnlcchcls and phthalic acid) in a ratio of 1;1 (9-5)0 calcium stearate (Q.5/0 asbestos (31.6k)? lime powder (31.620 and colouring substances (4.8k). Other flooring materials described include laminates (in the form cf plates or rolls) which contain heat- and sound-insulating materials (optionally asbestos). 541 FRENCH PATENT. 1,298,598. PANELS. Deutsche Solvay-Werke. Panels, which are difficult to burn or are self-extinguishing, are made from wood chips, a binder and a fire retarding composition comprising 10-20 parts asbestos powder, 5-20 parts dicyandiamide or melamine, 50-85 parts boric acid, borates or phosphates, and 10-20 parts ammonium sulphate or amido-sulphonic acid. Before or after pressing, the mixture may be treated with a chloroparaffin containing 70. Cl. (Belgian Patent 606,858). ASARCO ALV 0006927 1 1 31 ASBESTOS BULLETIN. 542 VINYL FLOOR COVERINGS. S.Mot-tram, & L.R.Anthony. Brit. Plastics, July, 1952. 35, No.7, dd.334-338. Survey article on formulation, testing and use of the various types of vinyl floor coverings. 37 references. 54 3 PITCH FI3HE L PVC PRESSURE PIPES. Pi res & PiDelinos, July, 1952, p.GS. he UC-r c u o has f ormed a ncw Li vision, consequent upon its growing interests in pipe products of various kinds. It will be known as the tJ.a. .. Piooe 6c Euctinn Division of the Universal Asbestos Ilfg. Co. td. 1902, 00.31-36. rices &: rip-o lines .-.ugust vital section cf the -l-rstic industry is undoubtedly that :cncer- n ? d v; i t h t h 2 p-r eduction c: lar.ee that it can artlv l- rid PVC pipe, in fact, it is now so scribed as 'an industry within an crises standards, uses and advantages cf-rVC cites. 5b5 C HID:! CAELY- RE 313LA NT ILiTIRIAL. L.^.Yatvee" i: Id. I. Babushkina. 2A Vscs. Ahi.Cbsh2i . i.r..Idsudeleave, 1951? 5, No.5. 7C8-S- A new v/ater ^nd acid-resistant material for roofings and linings is made by hot-prossing a mixture of 55;h cf sand (from Moldavian dcccsits) ground to cbt.-.in spec, surface of 3500-4000 crZ/g. , 203c ur.grcund sand, 41 NapSiFie and 1C,-- asbestos (grade VI-VII) with the addition of we-ter-giass. The srecixic weight cf the product is I.O4-1.90 g/errk , and water absorption amounts to 10a. The product has a high frost-resistance and other valuable properties, it has been found that the main bindi.tn agent is'highly dispersed silica produced by the interaction between I^Si?^ and water-glass. 546 ONE-PLY PI 111 PUTS PLASTIC ON ROOFS. Chem.Ueek, July, 28, 1952, 91, No.4, p.38. News note about T/i'A 200, oroduced by Ruberoid Co., which consists of a pigmented polyvinyl fluoride film laminated to asbestos felt and is applied 'with conventional roofing cements. ASARCO ALV 0006928 ASBESTOS BULLETIN 132 PART 8 ASBESTOS PAPER & INSULATING MATERIALS. 517 PAPER-PACKED TOWERS. Che.Ti.Week, August 4, 1962, 91, No.5, ?.59- Hews note about s phosphated asbestos and pacer honeycomb material developed by Johns-Hanville for packing in water cooling towers. 5At BRITISR PATENT 894,615. VACCINE PROCESS. Chas.Phizer & Co. A virus r.edicr containing poliomyelitis virus is filtered through an asbestos-cellulose filter pad capable of passing 50 gallons of vscor ter souare foot ter hour. 5-9 ",3. rATrETT v-,C ;5,698. Izador J.Novak, (to RaybestcsFanhaztan, Inc.) Itay 22, 1962. k method for straining colloidally iisoersed asbestos fibre to remove oversize particles is claimed. 55c s._a?bic.,n_?ai:.::i 3.51/3012. objects gp inorganic FIBRES. E. H. B. Nystrbn. Slabs -:r sheets are formed from, aqueous suspensions of inorganic fibres in water cc 'vhich is aided starch or a starch-containing material while in whoII'* or essentially ungelatincus form. Bryins is carried out at a temoerature sufficient to cause the gelatinization cf the starch acting as a binder. 51 GERMAN PATENT 1,049,764. IMPREGNATED ASBESTOS FIBRES AS FILLER AND. INSULA TING AGENT FOR CUE NT FIXTURES. Karl Hsscnl. AS3ESTOS-31LICATE KEAT-I"SULATING WARE. I. -.Volchek, Stroit. Mat. 19-51, 7, No.5, PP- 9-13* 53 BRITISH PATENT Q00,468. COVER PLATES, INSULATING WALLS AND PANELS. YLW.Siek G.m.b.H. his patent mentions an adhesive containing asbestos in powder orm. 554 BRITISH PATENT 8-91,163. THERMAL INSULATION. British Oxygen Ltd. Asbestos-Magnesia insulation is strengthened by being made with a polyvinyl acetate emulsion replacing some of the water. u ' u h 'h ASARCO ALV 0006929 I 133 ASBESTOS BULLETIN 555 PITTSBURGH CORNING BUYS A NEW PLANT. Ghem.Eng.New 1 July 30, 1962, 40, No.31, P-41. Pittsburgh Corning has bought Union Asbestos and Rubber.Co.'s I ! Unibest os oipe and block insulation plant. Unibest os is a high temperature insulation. Pittsburgh Corning will continue to use the'trade name "Unibestcs". PART 9 REFRACTORY FIBRES. =56 FILTRATION CERAMICS FROM MASSES EASED ON WASTES FROM ASBESTOS-DRESSING WORKS. M.A.Matveev, X.A.Smirnova & V.F.Ustinova - Steklo i Keramika, 1962. 19, No.7, 28-32 Porous ceramics, having good filtration properties- high mechan ical strength and chemical resistance, can be produced from waste materials from the asbestos industry using clay-bentonite or pure clay r-inbers. Asbestos wastes usect m experiments aescnoea m this article consisted of 70-80;. serpentine, 6-lC/t chlorite, 4-S>fc divine and ?-12?c calcium and magnesium carbonates; they were calcined at 1250; their alkali-resistance was 9?M and acid stance 9C Masses used in the oroducticn of oorous ceramics contained 30-907= of the asbestos wastes, 5-503= clay and 0-5;? bentonite. The casting method was employed using plaster of Paris moulds. The firing temperature was 12C0-1300C. -'i I TINY SPRINGS MADS FROM ;t p^-7 The Financial Times, May 18, 1952. Tiny coiled sorings of fused quartz wire are sdd by their Ameri can maker to be so sensitive that they can show "the increase bacteria gain in weight when they ere fed'1. The springs are made by pulling fibre from fused quartz and wrapp ing it cn a slowly turned mandrel mounted in a lathe. As the quartz thread is wrapped, it is heated -dth an acetylene torch to fix the shape of the spring. 558 LEAD MIXED WITH METAL FIBRES. The Financial Times. August 17, 1962. Lead and bearing metal alloys mixed with a small amount of fibrous metal show an increase of as much as 800 per cent in creep strength, an American association reports. experimenters discovered that because of the blotter-like effect cf the metal fibres the lead would not run out even when melted. I To strengthen white metal bearings, an little as 20 per cent of mild steel fibres will increase the strength of the alloy eight fold. J ASARCO ALV 0006930 r asbestos bulletin 134 559 CERAMIC FIBRE PAPER. The Financial Times, May 25>1962 Ar. American 'paper' made of ceramic fibres is reported to with stand temperatures of 2,500F while retaining the flexibility of ordinary paper. The material is intended for lining the tailpi res of jet engines to protect them from heat. It is one of several exotic 'papers' which are also being made of fibres of aluminium, copper, silver and nylon. REINFORCED PLASTICS FOR ABLATION APPLICATIONS. Mat. in Design Eng., July, 1! 9 a/>r2 ., . . - ' r * High temperature phenolic resin is combined with graohite cloth in ere case! and with silica cloth in the other, tc make up two now 0 --3.*^ TH3 X 0 ^1. ^ I-S Both reinforced elastics are available from Taylor Fibre Co., Norristown, Fa. Grethite-reir.fcreed plastics generally have excellent ablation 'a y> r *" r? v- ' a c* for their weight. In this case, the specific gravity Are si lie a-"hen die ccncosite has a specific gravity cf cnTT ` BRITISH PATENT 900,453- CATALYTIC DECOMPOSITION. Eneleha rd Industries Inc- s mentioned a- catalyst carrier. 552 BRITISH PATENT 698,391- Ii?R0VE.2NTS RELATING TO PACKAGING. Uni ve Her Ltd. This mention relates to a method of manufacturing an hermetically scaled container, by welding its parts by heat and pressure. Asbestos mentioned as a filler. BRITISH PATENT 897,976. ALUMINIUM FOIL PACKAGE FOR ANNEALING. Reynolds Metals Co.. This invention describes the placing of asbestos discs adjacent to each end sheet of annealed aluminium foil. It is claimed that asbestos discs absorb residual rolling oil which is driven frem the rcll during the annealing cycles. 5Si SOUTH AFRICAN PATENTS 52/608 & 62/702. FIBERISING ASBESTOS MINERAL. Mineral Ind.Corp.of America. A film of a liquid suspension of asbestos mineral particles is forced edgewise, under a pressure of at least 100 psi (preferably at least about 600 psi) through a thin, hard-surface gap, and ASARCO ALV 0006931 135 AS3EST0S FJLLETIN. then thrown at an extremely high velocity (by virtue of the re duction of the high pressure to a much lower pressure beyond the gap) against a hard surface. Preferably, the film has a maximum thickness of about 0.09 in., and moves through the gap with a substantial change in direction as compared to the previous dir ection of flow. 565 ELECTRON .VICROC-RnPHS 0? SOME UNUSUAL INORGANIC FIBRES. Charles '.V. Huggins. U.S.3ureau of Minos Dept.Invest. 6020 (1962). Samples cf chrysotile, cobalt-chrysotile, and serpentine are pictured as well as a number of other natural and synthetic materials. 565 AMEHISOLES. I. 0XIP..TICN OF CRCCIDCLITE. II- KINETICS CF ON I RATIO I; CF ORCCIDCLIIZ. C. C .Addison . .E.,.ddison, G.H.Noai and 0. U. Share-, J .Chsm, Sec . , 1952, 1458-1475. `ART 11 RZVIZ'V 0? JOUR] SBESTOS, .-.ugust, 1961. cv r '.'estern Savings -und Bldgs.. Philadelphia 7S Pa. , W Z/ * rzT 1. RESEARCH IN ASBESTOS UTILISATION. `7.2. Sinclair P.2. The demand and supply position is discussed and the need for development work to create a new market is stressed. 2. FINNISH A NT HOPHYLEIIE ASBESTOS, p.12. Standard grades and classification. 3. THE EVOLUTION CF THE DONOVAN FIBRE EXTRACTION SYSTEM, c.lS. A straight line gravity flow fibre extraction system is described by R.A.Donovan. 4. ASBESTOS-C-EMENT SIDING REJECTS, P.28. The installation cf an Ohmart nuclear quaging system by The rhilip Carey Nfg. Co., has imeroved the consistency in quality and reduced rejects. 5. REVOLUTIONARY CLALI3CARD. o. 52. Advantages cf asbestos- based Colcriith chalkboard installed in Canadian schools are listed. 6. MARKET CONDITIONS, c.36. ASARCO ALV 0006932