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Method for producing non-woven fabric

A manufacturing method and non-woven technology, applied in the field of non-woven manufacturing, can solve problems such as difficulty in suppressing cost, reduction in non-woven strength of fluffed non-woven fabric, and non-woven fabric damage.

Active Publication Date: 2014-02-26
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the method of producing a fluffed nonwoven fabric described in Patent Document 1 and the method of processing a napped sheet described in Patent Document 2 both use only sandpaper to process the nonwoven fabric, so the softness is poor and it is difficult to improve the water conductivity. , and cause greater damage to the non-woven fabric, which reduces the strength of the non-woven fabric of the obtained fluffed non-woven fabric
In addition, since the method for producing a nonwoven fabric described in Patent Document 3 uses needle punching, the production speed is slow and it is difficult to suppress the cost.
In addition, the method for producing a nonwoven fabric sheet described in Patent Document 4 only uses a stretching treatment to fluff it. Therefore, since the stretching treatment causes large damage to the nonwoven fabric, it is difficult to lighten the fluffed nonwoven fabric obtained. The reduction of the strength of the non-woven fabric

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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  • Method for producing non-woven fabric
  • Method for producing non-woven fabric
  • Method for producing non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] Use unit area weight 15g / m 2 , SMS non-woven fabric with a fiber diameter of 1.3dtex and an area ratio of 15% of the thermocompression bonded part (the thermally welded part produced by embossing). The fiber of the spun bond layer of this SMS nonwoven fabric used the fiber which mixed 1.0 mass % of the softening agent (specifically, erucamide) as a surfactant in the ethylene-propylene copolymer resin. follow with Figure 2 ~ Figure 4 The above-mentioned processing method shown is performed in the same manner. In addition, the height of each convex portion 310 of the convex roller 31 used for fluffing is 0.6 mm, the distance (pitch) between adjacent convex portions in the rotation axis direction is 1.4 mm, and the adjacent convex portions in the circumferential direction The distance (pitch) from each other is 2.1 mm. The conveying speed V3 of the nonwoven fabric was 20 m / min, and the convex roller 31 was rotated at four times the peripheral speed V4 in the opposite d...

Embodiment 2

[0131] Using a spun-bonded non-woven fabric layer made of polypropylene resin, with a basis weight of 15 g / m 2, SMS non-woven fabric with a fiber diameter of 16 μm and an area ratio of 20% of the heat-compression bonded part (heat-welded part by embossing). Processing under the same conditions as in Example 1 was carried out to obtain the nonwoven fabric of Example 2. The total draw ratio of the nonwoven fabric is 1.7 times. The ratio of the pitch of the thermocompression bonding part of the nonwoven fabric to the pitch of the convex part of the concave-convex roll (the pitch of the thermocompression bonding part of the nonwoven fabric / the pitch of the convex part) in the MD direction (roller circumferential direction) It was performed at 0.37, and it was performed at 0.37 in the CD direction (roll rotation axis direction). The ratio of the area ratio of the thermocompression bonded portion of the nonwoven fabric to the total draw ratio of the nonwoven fabric was 0.118.

Embodiment 3

[0133] Using a composite spunbonded nonwoven fabric layer with a core made of acrylic resin and a sheath made of polyethylene resin, with a weight per unit area of ​​17 g / m 2 , a nonwoven fabric with a fiber diameter of 17 μm and an area ratio of 16% of the heat-compression bonded portion (heat-welded portion generated by embossing) without a meltblown layer and only a spunbond layer. Processing under the same conditions as in Example 1 was carried out to obtain the nonwoven fabric of Example 3. The total draw ratio of the nonwoven fabric is 1.7 times. The ratio of the pitch of the thermocompression bonding part of the nonwoven fabric to the pitch of the convex part of the concave-convex roll (the pitch of the thermocompression bonding part of the nonwoven fabric / the pitch of the convex part) in the MD direction (roller circumferential direction) Performed at 0.23, and performed at 0.40 in the CD direction (roll rotation axis direction). The ratio of the area ratio of the th...

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Abstract

This method for producing a non-woven fabric involves a process for raising the constituent fibers of a non-woven fabric and a process for partially stretching multiple sites of the non-woven fabric subjected to the fiber raising process. The process for raising the constituent fibers of the non-woven fabric involves raising the constituent fibers by hooking same or involves raising the constituent fibers by rubbing the surface. One end of the fibers is cut by means of the rubbing action during the process for raising the constituent fibers of the non-woven fabric. During the partial stretching process, multiple sites of the non-woven fabric subjected to the fiber raising process are stretched at a mechanical stretch ratio between 1.05 and 20.

Description

technical field [0001] The present invention relates to a method for producing nonwoven fabrics. Background technique [0002] As a technique for fluffing the constituent fibers of the nonwoven fabric, for example, processing the nonwoven fabric with needle punching or sandpaper, or flocking the nonwoven fabric by a flocking technique are conceivable. [0003] For example, Patent Document 1 describes a method in which a nonwoven fabric is passed through a roller coated with sandpaper after applying mechanical force by adhesion processing to a nonwoven fabric to form a weak portion in the constituent fibers. Then, a nonwoven fabric is produced with a raising machine to make the constituent fibers fluff. In addition, Patent Document 2 describes a treatment method of a napped sheet in which a napped sheet is rubbed and then rubbed with sandpaper. [0004] In addition, Patent Document 3 describes a method for producing a nonwoven fabric in which a web is shrunk, and then the s...

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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IPC IPC(8): D04H11/08A61F13/15A61F13/49A61F13/511D06C11/00D06C23/04
CPCD06C23/04A61F13/511A61F13/15731D04H11/08D06C11/00A61F13/51104
Inventor 小林秀行衣笠由彦
Owner KAO CORP
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