| 摘要 |
PURPOSE:To obtain the above fiber which soft feel and high strength to be used for e.g. disposable diapers, by conjugate spinning with a blend of an ethylene copolymer of specific physical properties and crystalline polypropylene as the sheath component and polyethylene terephthalate as the core component under specified conditions. CONSTITUTION:(A) As the sheath component, a blend of (i) 99-50wt.% of a linear low-density polyethylene, a copolymer constituted of ethylene and octene-1, with the octene-1 content of 1-15wt.%, density of 0.900-0.940g/cm<3>, melt index determined by the procedure: ASTM D-1238(E) of 25-100g/10min, and heat of fusion of >=25cal/g and (ii) 1-50wt.% of a crystalline polypropylene with a melt flow rate determined by the procedure: ASTM D-1238(L) of <=20g/10min and (B) as the core component, polyethylene terephthalate are subjected to melt extrusion at spinning temperatures of 210-250 deg.C and 275-295 deg.C for the component A and the component B, respectively, followed by take-up at a speed of >=4,500m/min, thus obtaining the objective conjugate fiber. |
