| 摘要 |
PURPOSE:To obtain the subject liquid filter, safe in aspects of food sanitation and capable of instantaneously permeating hot water or water without falling off fine grains, etc., in the interior of a wrapping material by applying a specific amount of specified sucrose ester of a fatty acid to a nonwoven fabric composed of synthetic fiber. CONSTITUTION:A liquid filter composed of a fibrous material is obtained by applying, e.g. a monoester expressed by the formula (R is alkyl) and prepared by adding a fatty acid in an amount of 0.01-10wt.% based on the weight of fiber to a nonwoven fabric composed of synthetic fiber. The filter is safe in aspects of food sanitation, capable of instantaneously passing hot water or water and suitable as liquid extracting bags such as coffee bags or tea bags. Furthermore, a nonwoven fabric having >=5g/m<2> basis weight and 10-500mum pore size or a melt blown nonwoven fabric having <=5mum average fiber diameter and >=5g/m<2> basis weight, etc., according to the purpose of the liquid extracting bags can be exemplified as a preferred material for the nonwoven fabric. |
