Method of making a water disintegratable non-woven fabric
First Claim
1. A method of manufacturing a water disintegratable non-woven fabric, comprising:
- a step of forming a fiber web from fibers having a fiber length of 10 mm or less, a step of applying a water jet treatment to the fiber web to obtain a fiber sheet having a wet strength of less than 100 g/25 mm in MD and CD;
a step of adding a binder of alkylcellulose to the fiber sheet, to obtain a water disintegratable non-woven fabric; and
a step of impregnating the non-woven fabric with an aqueous solution in which an electrolyte selected from the group consisting of monovalent organic salt and monovalent inorganic salt is dissolved.
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Abstract
A water disintegratable non-woven fabric having excellent water disintegratability and high wet strength can be obtained by a step of forming a fiber web from fibers having a fiber length of 10 mm or less, a step of applying a water jet treatment to the fiber web to obtain a fiber sheet having wet strength of less than 100 g/25 mm in MD and CD, the wet strength being defined by tensile strength at break of the fiber sheet, as measured by using a tensilon tester with a chuck distance of 100 mm, at a tensile speed of 100 mm/min to the fiber sheet which is cut into 25 mm width and 150 mm length and impregnated with water in an amount 2.5 times the weight of the fiber sheet, and a step of adding at least one binder selected from the group consisting of carboxymethyl cellulose, alkylcellulose, polyvinyl alcohol and modified polyvinyl alcohol to the fiber sheet. The water disintegratable non-woven fabric is sufficiently bulky and has an excellent wiping effect.
53 Citations
11 Claims
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1. A method of manufacturing a water disintegratable non-woven fabric, comprising:
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a step of forming a fiber web from fibers having a fiber length of 10 mm or less, a step of applying a water jet treatment to the fiber web to obtain a fiber sheet having a wet strength of less than 100 g/25 mm in MD and CD;
a step of adding a binder of alkylcellulose to the fiber sheet, to obtain a water disintegratable non-woven fabric; and
a step of impregnating the non-woven fabric with an aqueous solution in which an electrolyte selected from the group consisting of monovalent organic salt and monovalent inorganic salt is dissolved. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
copolymers of polymerizable acid anhydride compounds; and
amino acid derivatives.
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11. A method of manufacturing a water disintegratable non-woven fabric as defined in claim 10, wherein the alkylcellulose is methylcellulose, the electrolyte is sodium sulfate, the copolymer is partial sodium salt of (meth)acrylic acid (ester)-maleic acid copolymer, and the amino acid derivative is trimethyl glycine.
Specification