Document 0gKo3mxBe4EaK5rXZB15qOLJb

V Tot Hr. J. V, H*cLc*t - Technical Center fir. V. C. Taylor - Technical Center fir* 0* L. Kalousek - Technical Center Mr. U. B. Casey - Technical Center Mr. B. F. Truma Mr. L. R. Finn ect Mr. 0. 0. Burch Mr. V. J. Stewart February 16, 1956 ts * PLAINTIFF'S 2 EXHIBIT i<9 A\A5.^>'CC^ GLKfcEAL RESEARCH - KAILO DIVISIOH MINUTES OF KEETIHO - Friday, February 10. 1956 CORE MATERIAL Since two lots of core material which had been made for label service ty Underwriters had been rejected, this natter was discussed at some length. The core material in both batches Ro. 8 and 15 was strong, but the small fire test which Underwriters ran shoved both of then to give temperature rise on the cool side considerably in excess of that which the existing specification Bp2969 allowed. This, specification was based on core material made at Berlin several years ago. Another batch Ko. 13, made with hydrated line, was tested ty then unofficially and Indicated that it may have been suitable fron a temperature rise r.tendpoint, based on only one test. Since a cement batch would be slightly cheaper to make from a raw material standpoint, batch Ro. 12 was tried containing cment, and data subsequent to this meeting indicated that it also had high teonerature rise and would not be acceptable from this standpoint. Batches Ro. 11, 13, lit end 1f> were based on suggestions by General Research. Batch No. 12, containing cement, was based on former formulations at ScyreviUo. Bata obtained ty Drs. Taylor and Kalousek led to a discussion of the possible causes of the high temperature rise. One thing was cl dear, and that is that both batches Ro. 13 and 15 indicated by X-ray /rthat about 10 of unre&cted silica was present. There was a difference of opinion as to the cause, but no specific data were available to .l. indicate whether the unreacted silica was due to insufficient induration, or due to formulations containing alumina and iron which, under the _ / conditions of induration used, produced an end structure from which scme of the available silica had been rejected. f ALL-STATE LEGAL y<U\ C- GCKtRAL 1D5G 01 096 1545 2 It should be noted that indurating pressures at both Berlin tod Sayrcville ware 125 and 150-175 psi respectively. The pressure used in those runs was 250 psi* It vas generally conceded that the SID system, per ee, vas usable but that the pressures cay have produced a crystalline structure vhlch from sacs standpoints night be desirable, but would lead to high conductance paths for heat and, therefore, give high tenperature rise in a fire test* The data obtained at Underwriters* laboratories bear out this last point* Crs. Taylor and Kalousek will study- the data available and naloe reooanendatioas as soon as practicable as to the next femulations to try and whether or not other pressures should be used* IATL0 20 It vos pointed out that froa a manufacturing standpoint Kaylo 20 is expensive to make, largely because of its inability to be pre hardened, and because the slurry itself is so thin that settling of the solids and leakage from the pans produces bad ware* The items discussed were* 1* Keens for thickening the slurry. 2* Reduction or modification of asbestos types, treatment and content. 3* The effect of radiation In density of the X factor* It vua pointed out by Dr* Taylor that work had been done on a precooked slurry which vas then extruded continuously to fora pipe insulation* A sample was shots which had eosse irregularities in the surfaco, but it vas pointed out that this vas made on a rather crude r-ock-up intended primarily as a demonstration rather that even a pilot machine* The prohim of producing a pilot model is entirely one of engineering, and since General Research has no engineers available, it van agreed by Mr* Trunr* to revlerv the engineering situation within the Kaylo Division to see if any assistance at all could be given* It vas Hr* Hackett*s estimate that it would take two months of a qualified engineer's full tlso, with a large part of that time being spent in Toledo to work with the General Research people* KOFMAL KAYLO A* Thermal Conductivity It vas pointed out that our normal Kaylo is no longer one of the leading calcium silicates ir. the Held, and that it vas imperative that we taka steps to Improve our product to be as good or better than coo^etition. One of the main factors is themal conductivity sad the follouing items vero discussed* Q1 096 1546 3 1. Review Dr, Taylor's prograa for studying thermal conductivity In different batches* 2* Since asking specimens by the SO system can be done only at Berlin* plans are to be made for making samples at Berlin for testing In the apparatus at General Bssearch* The planning of the specimens to be made under this program will be coordinated by Dr* Taylor and Mr* Sbunan* Mr* Eackett stated that in slew of the extensiveness of the progrsa, it auy y be worth considering a second pipe testing apparatus/ ^ in order to got answers In a reasonable time* V -a Duplicating the apparatus now in use would not be ^ 3 </ s complex after building the original* f3 3* The lack of softness vss discussed at length* in which it was pointed out that there are different points of view on this property* However* more and more opinions in the field seem to indicate that.a product softer than normal Kaylo is desirable* Ccsaoits have been made that it should be like Thensobestos* yet at times Thernobestos has been found to be as hard or harder than noxmal Kaylo* It has also been stated that normal Kaylo should have the softness of Ksylo 20* An attempt will be made by the Kaylo Division to evaluate the definition of the term "softness" by means of specific value is the hardness tester* as run by the Navy* It is rather obvious that the tens "softness" is probably tied up in other factors* such as tiie ease of breaking when a piece of insulation is bumped and the ease with which vires can be burled in the insulation during installation* \ Hi* Aaoalte Asbestos * It was the concensus that it is highly \ desirable1 to use amosite asbestos in all Kaylo products* and Mr* Trura stated that work was under way In obtaining suitable grades for use at the Berlin plant* \ The question of AE saosite was discussed for use in normal Kiylo* and it was Dr* Taylor's opinion that It should not be considered suitable for light density products* This is based on the weakness of the fiber and the faot that it does not have the suspending power of 6D asbestos* It was considered probable that it may have acne benefit in heavy donsity material* but that this should bo evaluated by actual tests rather than adopted on the basis that it does no harm being included* 01 096 1547 / Nk 5* Shrinkage. Shrinkage of Kaylo materials In service vas discussed, particularly from the standpoint of re-application of the material In the field, as Is done In many casea vhere the insulation la removed for Inspection of the metal beneath it Bid the Insolation re-applied. The question of chamfering the inner edge vas discussed, and it vas pointed out that this would need sene study before being adopted as a standard procedure, because the levy has minimum thickness requirements vhlch vould be violated by this. Throughout the meeting as each general topic vas discussed, the desire for more basic research vas expressed so that the Kaylo Division vould have more data available as to the effects of the many possible variables on the end product. It is presumed that Oenoral Gasearch will consider this utter In setting up their research programs. fiespectfully submitted. 8. C. Shuman de / 01 096 154$