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Permeable non-woven fabric

A non-woven, water-permeable agent technology, used in textiles and papermaking, medical science, absorbent pads, etc., can solve problems such as excess drying capacity, unevenness, and no specific record of coating conditions.

Active Publication Date: 2015-12-02
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when a large amount of treatment liquid is applied, there are problems such as migration tends to occur during drying in the drying step after coating, and uneven adhesion of the water-permeable agent tends to occur, or insufficient drying occurs due to exceeding the drying capacity.
[0006] In addition, the following Patent Document 1 describes a slit coating method, a spray method, and a kiss coating method for reliably attaching a water-permeable agent component to individual nonwoven fabric fibers in order to eliminate adhesion unevenness. There is no specific record of the release conditions
In addition, in recent years, with the increase in production of non-woven fabrics, it is necessary to increase the speed of equipment. Due to the influence of uneven adhesion of water-permeable agents and insufficient drying due to the increase in speed, it has become difficult to uniformize the water-permeable performance of non-woven fabrics.

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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  • Permeable non-woven fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0079] On the nonwoven fabric obtained in the production (A) of the nonwoven fabric, a 1 wt % aqueous solution of a water-permeable agent containing a mixture of a polyether compound and a polyvinyl ether-modified silicone was adjusted to a liquid temperature of 20° C. and a liquid viscosity of 2.3 mPa s, with a coating amount of 30wt%, using a diagonal pattern of 120 mesh, and a groove volume of 22cm 3 / m 2 A gravure roll was used for coating, and then, it was dried by a drum dryer at 120° C. and wound up. Coiling takes the paper tube as the core for long coiling. In addition, the polyether compound and polyether-modified silicone used were obtained by the following method.

[0080] Regarding the polyether compound, glycerin and propylene oxide were reacted to obtain an adduct having an average degree of polymerization of 50. Next, the obtained adduct was polyaddition-polymerized with ethylene oxide so that the average degree of polymerization became 15. This is reacted w...

Embodiment 2

[0084] In the manufacture of non-woven fabrics (A), the weight per unit area is 15g / m 2 The line speed is adjusted in the same way as above, and the non-woven fabric is obtained by the same operation. A water-permeable agent was added to the obtained nonwoven fabric in the same manner as in Example 1 to obtain a water-permeable nonwoven fabric. Table 1 shows various measurement results of the obtained water-permeable nonwoven fabric.

Embodiment 3

[0086] In the manufacture of non-woven fabrics (A), the weight per unit area is 10g / m 2 The line speed is adjusted in the same way as above, and the non-woven fabric is obtained by the same operation. A water-permeable agent was added to the obtained nonwoven fabric in the same manner as in Example 1 to obtain a water-permeable nonwoven fabric. Table 1 shows various measurement results of the obtained water-permeable nonwoven fabric.

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Abstract

The objective of this invention is to provide a permeable nonwoven fabric imparted with uniform permeability for smoothly absorbing urine, bodily fluids, and the like. This permeable nonwoven fabric is characterized in comprising a polyolefin thermoplastic fiber, the average value and CV value of the permeable flow length value at a 45° inclination in the MD direction of the nonwoven fabric being respectively no more than 90 mm and no more than 5.0, and the R value of the second-time permeability durability index being no more than 60%.

Description

technical field [0001] The present invention relates to a polyolefin-based water-permeable nonwoven fabric, and more particularly to a water-permeable nonwoven fabric that absorbs urine, body fluids, etc. smoothly and imparts water permeability uniformly when used as a surface material such as sanitary materials. Background technique [0002] Polyolefin-based nonwoven fabrics are used as sanitary materials such as disposable diapers and sanitary napkins, and wet wipes because of their raw material characteristics, such as the non-wet feeling of the parts that come into contact with the skin and the comfortable touch on the skin. In addition, because of its excellent chemical resistance, it is used in various applications requiring water permeability, such as industrial materials such as filters, wipers, and battery separators. Since polyolefin-based nonwoven fabrics are hydrophobic, water permeability is imparted by performing a water permeation treatment with a water permea...

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 Patents(China)
IPC IPC(8): D06M15/647A61F13/49A61F13/511D04H1/4291D04H3/16D06M15/53D06M101/20
CPCD06M10/025A61F13/15A61F13/511A61F13/51121D04H1/4291D04H3/16D06M15/647
Inventor 矢放正广税所一哉中东登志子
Owner ASAHI KASEI KK