| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filter for food which is excellent in powder leakage property, heat seal strength, transparency, mechanical strength or the like. <P>SOLUTION: In the filter for food is formed of a biodegradable laminate nonwoven fabric composed of a long fiber and a superfine fiber of a polylactic acid polymer, the laminate nonwoven fabric is prepared by unifying at least two kinds of nonwoven fabrics, a long fiber nonwoven fabric having fiber diameter of 10 to 20 μm and a basis weight of 10 to 40 g/m<SP>2</SP>and a superfine fiber having fiber diameter of 1 to 10 μm and a basis weight of 1 to 10 g/m<SP>2</SP>by thermocompression bonding, and the laminate nonwoven fabric has a thickness of 0.02 to 0.50 mm and an air permeability of 100 to 300 cc/cm<SP>2</SP>/sec and a heat seal strength of 4 N/25 mm or higher. <P>COPYRIGHT: (C)2011,JPO&INPIT |
