Patent ID: 6235390
Filing Date: 2001-05-22
Classification: D01F,D21F,Y10T

Abstract:
A filament for use in papermaking machine felts, comprising:a synthetic melt spun polyamide polymer;a formic acid relative viscosity of at least about 140;a denier of about 2 to about 80 (a decitex of about 2.2 to about 89);a tenacity of about 4.5 grams/denier to about 7.0 grams/denier (about 4.0 cN/dtex to about 6.2 cN/dtex), and the percent retained tenacity(i) is greater than or equal to about 50% when immersed for 72 hours at 80.degree. C. in an aqueous solution of 1000 ppm of NaOCl, or(ii) is greater than or equal to about 50% when immersed for 72 hours at 80.degree. C. in an aqueous solution of 3% hydrogen peroxide, or(iii) is greater than or equal to about 75% when heated at 130.degree. C. for 72 hours.