Document v1bNb5nr2wGE9ybR2aLmonv1R

X YA CAMS3ZI?GS *) 'v ' *w^;'-'--r "UvJ ' ' <*V : ly y'/iW. -'i.-'^v1 DATE: *- *V SUBJECT: May 11, 1972 Asbestos CUbstltttfce}^^ ': :^V-:'':`-Sy)' - 'S' :.r " :>rt J'.>.>xv*.-'.. ?'* ./ ifpi *V S\-AY-?: . li i>,;' *,4; l *$? "Sfcfct, "; 'f*;'> V.*. ?.: iy>\Xi '."-A- < <7f\ ............ ' fhauttached article suggests to me a possible way to tom cor rvviSxEe^,txeab31te/tO', an advantage end perhaps get the government- * on oar side since lit' Is generally acknowledged that trenolite is not as had a pollutant as chrysotlle. Kaybe wo can market fibrous tremollte as a low (or non) pollution chrysotlle substitute for applications where chxysotlle dusting occur: -*.g., floor tile and brake linings. The acceptance of its reduc hazard may lead to less stringent standards for us, and possiuxj give us some unexpected income. Treaoliie has been used as a substitute for Aaosite asbestos in either alkaline or acid environments. I am told that while there is no cccacercial fibrous trenolite mined in the United States, a snail .To"rrtt is imported from Africa. . I heard of an attempt by Superior Asbestos company to look for applications of Libby treno lite. Do you have any recollections concerning this? Does it make sense to follow this approach any further? ' HCD:mlr Attachment H. C. Duecker !*9* P0078801 \QS> q7 l ;A' a lit `I . V-p-i.-t.; -.i-ii.iN in 3 <' i'. n; ' / :, up u 4.1 differs . ;*vo Jcc> vb.rrctcd 'y a fiber luinitli* of l/.t-nich di.'trneter. Atv. shown to automobile manufacturers seat a com L^t OrtKW aid .Swiic*** binatV^n headlight swiicii and dashboard dimmer control unit. D.vlining of rbshtroard 'railing w achieved without using a costly rheostat. --V Miners! Fit Replace Asbestos Fitter ^sasS^iS. '^ r2Ssre* $hy-ir. ,, A- _VN AV SX ' Jim Walter Research Corp^St, FlctersVutg>:.fTa. reports that mineral t fibcKjnay^twy wetl pro* a. to bcasuitabfe i# Q ............. '"W? b,:y:. ^{tprthf required to operate, electronic switching devices. A model of a sjstem which used fiber optics to ^^$^Mg|e..sim|<ificatkM off. the'art dectHol harness was %';jkgg&P .1 * ' - ,R Iho tfemomtratloo. there were no wires connecting a :. ;> v control pond with a boo* and a hearHight. When the horn ' '^'biWton was depressed. * light-emitting device sent en i * infrared signal at a predetermined ware length through optical fibers. A receiver at the other end of the fiber reacted and caused the horn to sound. The headlight was turned cn tlte same way. using an emitting device tending out a different signal. The development is based cm a new fiber optic material called Crofon IRX. The fibers show little susceptibility to radiation, essentially no cross talk, and the ability to carry replacement for asbestos as a fiTler. The current.concern bout on-the-job fiealth hazards, reflected in such legisla tion as the Occupational Safety aodllcalth Act (OS1IA) could very well speed up a n*itcfciqy;|tom asbestos. There is a growing concern aboot this hd^tnarA of. asbestos dust, > A It is almost impossible, to present airborne asbestos particles. The cost of adequate dust control equipment could be prohibitive. Like so many other discoveries, that of mineral filler as a substitute for asbestos came out ofan investigation or quite a different kind. Dr. David L. Skinner and Edward L. Moon were doing research in the use of fine-ground, crystal!' i r< ^`.-ciwvV y u . Citr bio. 7 t* Irishrssy <nk.l marble as a filler in plastics. At the same time, another research project into more efficient production of mineral fil>cr was going on'. Moon happened to note simlbiitics in (lie physical and chemical structure of mineral and asbestos fibers. It not only worked sscll but raw iinteri.il co'ts were reduced. The binstci absorption of mrierjt fiber is less, so lb.it higher fine-ground marble leech wor: used to bring 'lie piomix consistency to about that of the asbestos system. I'hi'to shosvs mineral tiller bring added to a plastic test formulation. o r* o ^