| 摘要 |
PURPOSE:To obtain an easily heat-bondable nonwoven sheet giving high adhesive force by partially hot pressing a nonwoven web made of a sheath-core filaments containing polyethylene terephthalate as the core component and polypropylene as the sheath component at specific ratios. CONSTITUTION:A sheath-core filament containing polyethylene terephthalate as a core component and polypropylene as a sheath component is produced by spinning a polyethylene terephthalate (preferably having an intrinsic viscosity of 0.50-1.20) and a polypropylene (preferably having a melt index of 1-40g/10min) with a conjugate spinning apparatus, The weight ratio of polypropylene to polyethylene terephthalate is 0.2-3.0. The filaments are opened and deposited and the obtained nonwoven web is partially hot-pressed (preferably at a temperature below the melting point of polypropylene) to obtain the objective heat- bondable nonwoven sheet to be used in the form of a bag, etc., by welding with heat. |
