| 摘要 |
PURPOSE:To obtain easily the titled drawn polyethylene material having a high elasticity and tensile strength, by melt extruding polyethylene (PE) having an ultrahigh molecular weight and a specific intrinsic viscosity and a low-melting paraffinic wax, drafting the extrudate, solidifying the drafted extrudate under cooling, and drawing the solidified extrudate under specific conditions. CONSTITUTION:A drawn polyethylene material, having an ultrahigh molecular weight, and obtained by melt kneading a mixture of (A) 15-80pts.wt. polyethylene having an ultrrahigh molecular weight and >=5dl/g intrinsic viscosity with (B) 85-20pts.wt. paraffinic wax having 40-120 deg.C melting point and <=2,000 mol.wt. at 190-280 deg.C temperature in a screw extruder, extruding the resultant kneaded mixture through a die at 210-300 deg.C, drafting the resultant undrawn extrudate at least >1 drafting ratio, solidifying the drafted extrudate under cooling, and drawing the solidified extrudate at least >3 drawing ratio. |
