In this application, severe physical demands are placed on the oxidized bitumen to control stress relaxation in the primary tufting cloth, to maintain and retain critical physical dimensions over a wide range of possible application conditions; to prevent excessive buildup of static electricity which may damage electrical and computer hardware as well as physical discomfort to building occupants; and to maintain physical dimensions under static loading conditions such as would occur when heavy objects are placed on carpet tiles over an extended period of time.

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