Document JJV00y32aj1LNgKVQp3ONK0DB

I\r r:/ ' OIC Co. Mr. C. ft. Mekert, Bound Brook Aug. 29, 1947 Zb oar research work eo Calsilite oar first sin has boon to produce auterlal that will bo strong enough to resist breaking under the itoippiag toot sad the`dropping tost, t least to the extant that 6& Magnesia resists thee* wane teste, better If possible* At the seas tiae It oust here good workability. To asst these tests Mr. fiekert bee set ap tentatively the following epoeifleatioiat A. Density 14 to 145 ft. Modulus of Bupture 0 to 70 Mr. Bigh has suggested thi.t la approaching the prcblea tram the point of workability the fallowLig specifications or characteristics should bo worked towardi Approadsately 14 lbs. deoeity b. Bodalas a little better thaa three tines density providing strength is saffieisat to 0. erold ebnocs.tl 'breakage. ^^ Bardaoss 'should be betwean.6 sd0'Xt\ i". " | n\ d. Hinging Muuld equal th> t. of 65 Magnesia. ] | . /J e. afasn disintegrated, the powdered aetriel sad fibre-should be ea^__ pressed between the .fingers Into snail ftyraallls.'*---------- ]( f. A knife tdcMi three' to four'tinea eeraos a 1" block should out it at least half war troughi II 1. Pipe coverlSfSiould be soft ebougi to psrniVcutting oat a notch and'gpoove for a bracket without breaking the place la two* h. Material should not break late pieces wbsa beatsa around a served ourfaoo or over a rivet heed. 1. Material should confess under pleasure la a alrrUar xexner to BSf Matymsia (vis. 2" thick piece should ooepross 1/B* with 83 lbs. per square Inch at 90F and ^.th 80 lbe. p.s.1. at 550F. Tbe thought has been expressed that if ttm present decree of hinging had bean attained ben using the 23 formula, Celsllito would have boon e thoroughly satisfactory eanoerciel produet. Zt is felt by the writer tint the 23 formula was and would be too brittle even with lender fibre. ' Tbs fibre is gripped eo tightly by the binder that it breaks rather .than slips or slides wbsa the aaierlel is broken, therefore, hinging is poor. Hinging is dependent not only on the fibre length but also'on tbs aanner in which the fibre is bonded end to the ce(iree it is lubricated by sons or ell of the netarld in the fomule. Our first goal of 14.0 to 14,5 density with 60 to 70 nodulus has been reached with the 116 type fomule. The 116 formulae also west Mr. High's suggestions der 0 i~0 22 L r.C6 V MICH08032