D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/6
D01F 9/22 (2006.01) D01F 9/16 (2006.01) D01F 9/24 (2006.01) H05K 9/00 (2006.01)
Patent
CA 1283516
PRODUCTION OF PARTIALLY CARBONIZED POLYMERIC FIBROUS MATERIAL HAVING AN ELECTRICAL RESISTIVITY OF ENHANCED STABILITY Abstract of the Disclosure Partially carbonized polymeric fibrous materials heretofore available have been observed to exhibit unstable resistivity values upon exposure to ambient conditions with such values substantially increasing upon the passage of time. In accordance with the concept of the present invention the previously prepared partially carbonized polymeric fibrous materials are subjected to heating at a temperature of approximately 180 to 450°C (preferably approximately 240 to 360°C.) in an atmosphere containing molecular oxygen for an extended period of time so that the quantity of bound oxygen present in the fibrous material is substantially increased, the electrical resistivity is increased, and the stability of the resulting electrical resistivity is substantially enhanced. The resulting partially carbonized polymeric fibrous material is particularly suited for use in applications where it serves as an electrostatic charge dissipater or as shielding for electromagnetic radiation.
518465
Ko Yoon S.
Venner Jozef G.
Basf Aktiengesellschaft
Smart & Biggar
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