Document g2RrBL95EeOqw0eqYxVqR7VgV

Dr. J J. Kolk k --T Cw l^)V ~ - ' DEC 3? $80 . // PLAINTIFF'S EXHIBIT DUP-2094 V*le*wg 78 Tu (085)66 33 84 Arr*#m. December 4th, 1980 Du Pont de Nemours * Company, Inc. Medical Division Atti_Dri_Bruce_Wit_Karrh WILMINGTON, Delaware^ 19898 USA Dear Colleague, In Kirk-Othmer: Encyclopedia of Chemical Technology - 3rd Ed. Vol 3 (1978 page 240), I read that,quote - For Noraex, and especially for Kevlar, as with any fine, fibrous material, inhalation of the *fly" generated in certain textile handling operations should be avoided. Because of this unusual high strength and cutting resistance, caution should be exercised in splicing, handling or cutting Kevlar - unquote. As I am asked for advice in handling these kind of fibers, I would ask you whether you could send me in more detail some information about which hazard could be expected when_ the not be taken Xn what way and to what extent is Kevlar comparable with fibrous materials like j 'glass fiber, rock wool or asbestos in relationship to length 1 and diameters of the material? Are there any animal experiments j performed by Du Pont or by other laboratories or institutes? Thanking you in advance for your answer. Yours sincerely. Dr. J.J. Kolk (Occupational medical officer). DUP 0 9 3 7 1 9 6 DU 038187