Document 3e2gyapraoVnLQgxy2ENbogjD

/ October 10, 1968 L.K. tockett, Toronto 247 LI. tlrUoL Toronto 247 Trip hopart - Sooth Floinfiold; l.J. October B, 1968 FinurosF or tfif To reaolva tho problem of excessive dost la SprayDon Type A. C. Setterberg South Flaiafleld Float l. Xnfonto - Sooth Flaiafleld Float S. Fonfo - Metropolitan Spray Zac. 0. Leap thorns - Spr^ron Research Carp. D. Little - Donslco Service* Ltd. Lf. Kirkland - Cenodlea Cjrpm Co. Ltd. SUMMARY A number of trials vere carried out vtth vorloua combinations of formulation and oil opplleotian. Zt become increasingly errldeat Chat a dust free vool coaid not be pro duced vithia the limitations of the Underwriters' epee ificed one. The trial* vere concluded with a snail hand made sample which contained approximately twice the oil presently being applied to the Type A fiber. This appeared to inprove the dost coo*, dition l. Setterberg agreed to obtain additional oil noxzlee sad prodnee similar high oil sanploa on a production ran by Friday, October 11, 1968. Foafe agreed to test the staples as soon ns they era received. Depend Lag on the resalts of the teat Keopthorne will obtain Underwriters' approval for a Modified formal*. The mai* resale of the Meeting was to pises the nous fully on Lenpthorac to provide U.S.C. with a formula mhich whsn msaafsetared by U.S.C. will meet the dust require ments of the end user. DETAILS OF TRIALS Tbs various test mstarisls were sprayed wet with a Universal blowing machine supplied by Metropolitan Spray Ine. All tasts were carried oat with SprayDon type A material. 1. tegular Type A (fron nornsl production run) containing 2.21 oil - l.c. extra oil so that test is Just within the Underwriter# requirement for ash content. Results very dusty. 2. Type A with diatomaceous earth removed. Results - very dusty. 3. Type A with 151 asbestos (coopered with 301 for regular Type A) and oil applied to asbestos and chemicals only at the poLnt where they enter rotary mixer. (301 asbestos could sot he used because screw Co mixer would not handle this amount of asbeatos.) Result# - dust level acceptable. ...2 -1- . ' 4. Sow* u 3 wfipt llatMCMU earth Trim it. loult - slightly dutlar tka 3. 3. Ttfp* A with 30T esbeetoa mad opprasdnotoly 2.ZX dl applied with o end* rpray - t til* top aabestoa flaffer. Sesalt dost lrral unacceptable. f. Oil poured e* oafloffed block of aabeatee. leealt - oil appeared to eoak lace block bat chock ohovod penetration woo only ohont 1/16". Vo toot carried cutwith spray wachlno. 7. Typo A prodoeed by Torrcseo* California Float. kaaolt - wterlal blew Tory dusty rod oppoorod to b* dustLcr thoa Sooth Flolaflold'o regular ly-pe A production. 5. Soad ooapl* of regular Type A prodacod with approximately 2.21 oil. The oil woo oddod to oobeotos o&d dry ehtwlcolo prior to mlxlax oabootoo oad wool. Sesalt - dnot lrral uaaeeeptable. 9. Soad saopla of regular type A aladlar to rt except oil leral approximately twice #8. Seoulta - doat lorel acceptable, lower or it la sot-known how the oil will react arhea the notorial la sprayed or vfaat hearing it will hare oo the fire teat. J tvzji cc JL. letterberg, Sooth Plalafleld W.C. iliiin, Chicago 17&-4 P.X. Dlaraeu, Chicago 423 H.S. Peaduao, Chicago 131-4 File