Fibers having improved color fastness and fibrous formed body constituted thereof

Abstract

A subject of the invention is to provide a fiber and a fibrous formed body, particularly, a nonwoven fabric all having an exceptional color fastness and high liquid absorption properties and high durable hydrophilic properties. This is attained by a fiber essentially based on at least one kind of thermoplastic resin, wherein a fiber treating agent containing component (A) to (D) described below is attached to the fiber, with specific ratio of each of component (A) to (D), wherein (A) is an alkyl phosphate metal salt in which the number of carbons of an alkyl group is less than 10; (B) is a trialkylglycine derivative; (C) is a hydroxycarboxylic acid; and (D) is an alkyl phosphate metal salt in which the number of carbons of alkyl group is in the range of 10 to 14.

Description

TECHNICAL FIELD[0001]The present invention relates to fibers having an excellent color fastness and excellent liquid absorption properties. Moreover, the invention relates to a fibrous formed body, for example, a nonwoven fabric, using the fibers having the excellent color fastness and the excellent liquid absorption properties.BACKGROUND ART[0002]Heat-fusible fibers formable by heat fusion are widely used for hygienic goods such as a diaper, a napkin and an absorbent pad, daily necessities, an industrial material such as a filter, and so forth because a nonwoven fabric having a good feeling can be easily obtained with a high safety by utilizing heat energy from hot air, heat rolls or the like. In particular, in the case where the fibers are used for the hygienic goods, high liquid absorption properties are required from necessity of quickly and repeatedly absorbing a liquid such as urine and menstrual blood.[0003]On the other hand, an antioxidant such as dibutylhydroxytoluene is ad...

AI Technical Summary

Benefits of technology

[0015]According to the invention, fibers having excellent liquid absorption properties and excellent durable hydrophilic properties, and having an excellent color fastness are obtained by attaching to fibers a fiber treating agent containing a predetermined amount of each of an alkyl phosphate metal salt, a trialkylglycine derivative and hydroxycarboxylic acid. Moreover, a fibrous formed body, for example, a nonwoven fabric can be attained as constituted of such fibers and having excellent liquid absorption properties and excellent durable hydrophilic properties, and having an excellent color fastness.

[0016]The invention allows a preferred compatibility of liquid absorption properties, durable hydrophilic properties and color fastness in the fibers and the fibrous formed body.

Problems solved by technology

Therefore, discoloration is easily caused if the fibers are stored in sunshine, directly under a fluorescent lamp, or the like for a long period of time, and thus a problem of deteriorating a quality level of a product frequently arises.

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