Biodegradable nonwoven fabric and fiber product using the same

摘要

A nonwoven fabric is provided that has biodegradability and has excellent mechanical strength and excellent texture in combination, and a fiber product containing the nonwoven fabric is provided. The biodegradable nonwoven fabric contains at least two kinds of fibers including a fiber A and a fiber B, in which the fiber A contains a first component having biodegradability, and the fiber B contains a second component having biodegradability. The nonwoven fabric contains a mixed fiber web having a mixing ratio (weight ratio) of the fiber A and the fiber B in a range of from 5/95 to 95/5. The first component contains at least one member selected from the group consisting of an aliphatic polyester and an aliphatic polyester copolymer each having a melting point that is higher than a melting point of the second component. A half crystallization time at 85 degree Celsius of the second component is longer than a half crystallization time at 85 degree Celsius of the first component.

主权项

1. A biodegradable nonwoven fabric, which is a mixed fiber nonwoven fabric comprising at least two kinds of fibers that are mixed including a fiber A and a fiber B,
wherein the fiber A contains a first component having biodegradability, wherein the fiber B contains a second component having biodegradability, wherein: (a) the biodegradable nonwoven fabric comprises a mixed fiber web having a mixing ratio (weight ratio) of the fiber A and the fiber B in a range of from 20/80 to 80/20, (b) the first component comprises at least one member selected from the group consisting of an aliphatic polyester and an aliphatic polyester copolymer each having a melting point that is higher than a melting point of the second component, and (c) a half crystallization time at 85° C. of the second component is 180 seconds or more,
a half crystallization time at 85° C. of the first component is 60 seconds or less, andthe half crystallization time at 85° C. of the second component is longer than the half crystallization time at 85°°C. of the first component by 80 seconds or more, and wherein the tensile strength of the biodegradable nonwoven fabric is between 2.1 and 3.0 N per 25 mm.