| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyolefin-based film composite where a filament nonwoven fabric and a microporous polyethylene film are favorably joined each other. SOLUTION: The polyolefin-based film composite is a laminate composed of the filament nonwoven fabric and the microporous polyethylene film. The filament nonwoven fabric comprises sheath/core-type conjugate filaments each of which is composed of a polyethylene sheath and a polyester core, wherein the polyethylene is 0.890-0.920 g/cm<SP>3</SP>in density and 75-115°C in melting point, being prepared using a metallocene-based polymerization catalyst, its Q-value (weight-average molecular weight/number-average molecular weigh) being preferably 1.5-3.5, and the polyester is≥45°C higher in melting point than the polyethylene. The filament nonwoven fabric is laminated with the microporous polyethylene film by melting or softening the polyethylene sheath of the conjugate filaments to form the polyolefin-based film composite. COPYRIGHT: (C)2004,JPO
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