D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/626
D01F 6/60 (2006.01) D02J 1/22 (2006.01)
Patent
CA 1235269
POLYHEXAMETHYLENE ADIPAMIDE FIBER HAVING HIGH DIMENSIONAL STABILITY AND HIGH FATIGUE RESISTANCE, AND PROCESS FOR PREPARATION THEREOF ABSTRACT OF THE DISCLOSURE A high-tenacity polyhexamethylene adipamide fiber is described, which has (1) a formic acid relative viscosity of 50 to 150, (2) a tensile strength of at least 7.5 g/d, (3) an intermediate elongation not larger than 8% under 5.3 g/d, (4) a difference between elon- gation (%) at break and intermediate elongation (%) under 5.3 g/d of at least 6%, and (5) a shrinkage factor not larger than 5% under dry heat conditions at 160°C. Preferably, the fiber has (6) an elongation of 12 to 20%, (7) a dimensional stability not larger than 13%, (8) a crystal orientation degree of at least 0.85 but not larger than 0.92, (9) a crystal perfection index of at least 60%, and (10) the peak temperature Tmax of the dynamic mechanical loss tangent (tan .delta.), as measured at a frequency of 110 Hz, satisfying the formula: 100 ? Tmax + 4(9.5 - DS) ? 116 wherein DS is for the tensile strength (g/d). This fiber is prepared by melting polyhexamethylene adipamide having a formic acid relative viscosity of 50 to 150, extruding the melt from a spinneret, cooling the extrudate to be thereby solidified, winding the resulting filament yarn at a take-up speed of 1000 to 6000 m/min, and then heat-drawing the filament yarn at a drawing speed not higher than 100 m/min.
465647
Asahi Kasei Kogyo Kabushiki Kaisha
Ridout & Maybee Llp
LandOfFree
Polyhexamethylene adipamide fiber having high dimensional... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyhexamethylene adipamide fiber having high dimensional..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyhexamethylene adipamide fiber having high dimensional... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1254903