Dispersible nonwoven fabric and production thereof

A technology for non-woven fibers and woven webs, which can be used in non-woven fabrics, textiles, papermaking, textiles, etc., and can solve problems such as non-woven webs.

Inactive Publication Date: 2000-05-03
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method is divided into two distinct stages, the fiber web cannot obtain a structure consisting of an internal strong area and a weak area.
It is not suitable for use as a dispersible material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Dispersible nonwoven fabric and production thereof
  • Dispersible nonwoven fabric and production thereof
  • Dispersible nonwoven fabric and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] experiment method

[0053] Holding Tensile Test: The holding tensile test is to measure the breaking strength and elongation or strain of the fabric when it is subjected to unidirectional stress. This test is known in the art and performed in accordance with Federal Test Methods, Standard 191A, Method 5100 (ASTM Standard, D-1117-6 or D-1682). Results are expressed as pounds to break and percent elongation before break. The higher the number, the stronger and more stretchable the fabric. The term "load" refers to the maximum load or force, expressed in units of weight, required to break or break a specimen in a tensile test. The term "strain" or "total energy" refers to the total energy under the load-elongation curve, expressed in weight-length units. The term "elongation" refers to the increase in length of a sample during a tensile test. Bar tensile strength and elongation values ​​are obtained using fabric samples of specified width, typically 1 inch (25 mm), spe...

example 1

[0054] Example 1 - Moist wipe formation (see Figure 1)

[0055] A. wet laying method

[0056] The pulp of basic composition is as follows, 50wt% northern softwood unrefined log fiber pulp (Longlac 19, Kimberly-Clark company provides); 30wt% secondary (wastepaper) fiber pulp (wastepaper pulp of BJ deinking ( Ponderosa Pulp Products, Inc., a division of Ponderosa Fiber Corporation Americas, Atlanta, Ga.); 20 wt% Southern Softwood Kraft Pulp; and 0.33% Aerosurf PA-227 Debonding Agent, Aerosurf-Witco Inc. (Dublin, Ohio), as per Traditional papermaking technology wet-laid on the multi-layer wire mesh fabric. This supporting wire mesh is PRO 47, and the forming concentration is 0.187%. The pulper is 45#, and each batch produces a roll of material. The speed of the production line is 50 feet per minute, basis weight 65 gsm, width 22 inches. The web (ie, web) was dewatered to a moisture content of about 500% dry weight of the web.

[0057] B. Spunlace processing

[0058] The suppor...

example 2

[0079] Example 2 - Dry wipe forming (see Figure 2)

[0080]Fiber web is formed according to the method for example 1, steps A~C. After the adhesive composition was applied on the first side, the calcium ion solution was sprayed on the same side to obtain an application level of calcium ions of about 100 ppm based on the basis weight of the paper web. The web was creped and adhesive was applied on the second side as described in Example 1, Steps E and F. The calcium ion solution was sprayed on the second side to obtain an applied amount of calcium ions of about 100 ppm based on the basis weight of the paper web. The web was then recreped and dried as described in Example 1, Steps F and G. As a finishing touch, the web is completely dried and made into a dry wipe product.

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PUM

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Abstract

A soft, absorbent nonwoven fibrous web, such as a wet wipe, capable of dispersing in an aqueous environment into unrecognizable pieces, made by a method comprising the steps of forming a wet-laid nonwoven web from an aqueous slurry of fibers; hydraulically needling the wet-laid nonwoven web; partially drying the hydraulically needled web; applying a binder composition to one side of the web; creping the web such that interfiber adhesion is disrupted and z-direction fiber orientation is introduced; optionally applying a binder composition to the second side of the web; recreping the web; drying and curing the web; and, converting the dried and cured web into a wet wipe, dry wipe, or other absorbent article. In the case of a wet wipe, a solution containing about 100 ppm of calcium ion is applied to the web, such as in a preserving solution. In the case of a dry wipe, the calcium ion is added after the binder is added to the web, and the final product is stored in a dry state. The combination of processes produces a web having a desirable tensile strength, bulk and softness during storage and use, yet will disperse in an aqueous environment into unrecognizable pieces.

Description

field of invention [0001] The present invention relates to water dispersible, fibrous nonwoven composite structures made from wet laid webs. More particularly, the present invention relates to a wet wipe article which is prepared by forming a wet-laid web from an aqueous pulp suspension, hydroentangling the web, applying an adhesive to one side of the web, The hydroentangled web is creped, the adhesive is applied to the second side, the web is creped again, and finally the web is dried and / or cured. After the final product is formed, the wiper is kept in a solution containing divalent ions to impart its dispersibility properties. Background of the invention [0002] Webs made of absorbent nonwoven pulp fibers have long been used as practical and convenient disposable towels or wipes. Typical manufacturing methods for such nonwoven webs are based on conventional high-speed papermaking processes with the addition of post-processing steps to improve absorbency or other proper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/49D04H1/04D04H1/42D04H1/425D04H1/46D04H1/58D04H1/64D21H11/12D21H13/08D21H13/14D21H13/24D21H17/37D21H17/66D21H25/00
CPCD21H25/005D04H1/04D04H1/42D21H13/14D21H17/66D04H1/465D21H13/08D04H1/641D21H11/12D21H13/24D21H17/37D04H1/425D04H1/4258D04H1/4291D04H1/435D04H1/49D04H1/587D04H1/64D04H1/43835Y10T442/2049Y10T442/2779Y10T442/689D04H1/58
Inventor K·Y·王L·M·德梅尼W·S·波姆普伦P·S·穆米克R·L·安德森J·F·梅克尔
Owner KIMBERLY-CLARK WORLDWIDE INC
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