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Non-woven fabric comprising staple fibers and an absorbent article using the same

Inactive Publication Date: 2002-02-07
CHISSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020] The specific volume of the non-woven fabric comprising staple fibers of the present invention is in the range of 40 to 200 cm.sup.3 / g. Preferably, it is in the range of 70 to 150 cm.sup.3 / g. It is not preferable for the specific volume of the non-woven fabric to be less than 40 cm.sup.3 / g, since the non-woven fabric becomes hard. Also, it is not preferable for the specific volume of the non-woven fabric to be more than 200 cm.sup.3 / g, since the strength of the non-woven fabric is lowered.
[0056] In a case where the thermal adhesive non-woven fabric comprising staple fibers of the present invention is thermally adhered at the intersection point of each fiber by the use of a thermal calendar roll, it is preferable to make the rate of the thermo-compression area be in the range of 10 to 30%. By selecting the above range of the rate of thermo-compression area, the non-woven fabric which is excellent in resistance against falling off of fibers and strength and has a soft hand feeling and touch can easily be provided.

Problems solved by technology

However, the above mentioned conventional non-woven fabrics lose the bulkiness of the non-woven fabric contributed by fibers, because the fibers of the non-woven fabric are arranged in the machine direction by combing fibers with a card clothing having needles of the carding machine.
Therefore, the bulky non-woven fabrics in which the sufficient contribution by fibers is exhibited have not been produced, and the conventional non-woven fabrics are not always satisfactory.

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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  • Non-woven fabric comprising staple fibers and an absorbent article using the same
  • Non-woven fabric comprising staple fibers and an absorbent article using the same
  • Non-woven fabric comprising staple fibers and an absorbent article using the same

Examples

Experimental program
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Effect test

example 2

[0076] A method for producing thermal adhesive staple fibers:

[0077] High crystalline polypropylene having MFR (melt flow rate) of 11 g per 10 minutes (the conditions 14 specified in JIS K7210) as a core component and high density polyethylene having MI (melt index) of 16.5 g per 10 minutes (the conditions 4 specified in JIS K7210) were spun out of an eccentric core and sheath type spinneret having 621 holes at the discharging ratio of high crystalline polypropylene to high density polyethylene of 5:5 and at the discharging volume of 450 g / min, and then taken up at the speed of 592 m / min to produce 11 denier unstretched fibers. When spinning was conducted, fibers were cooled by air cooling just below the spinneret, and then finishing agent comprising lauryl phosphate potassium salt as a main component was applied by using a contact roll.

[0078] This unstretched fiber was stretched between the first roll and the second roll to produce a stretched fiber having the fineness of 3 denier a...

example 3

[0082] The non-woven fabric was produced under the same conditions as Example 2 except that the fiber length of the conjugated fiber was made to be 10 mm.

[0083] As to the physical properties, the resultant non-woven fabric had a basis weight of 25 g / m.sup.2, a thickness of 4.4 mm, specific volume of 176 cm.sup.3 / g, and the number of the fiber lumps of 1.9 lumps per 20 g. The results are shown in Table 1.

example 4

[0084] The non-woven fabric was produced under the same conditions as Example 2 except that the fiber length of the conjugated fiber was made to be 15 mm.

[0085] As to the physical properties, the resultant non-woven fabric had a basis weight of 25 g / m.sup.2, a thickness of 4.25 mm, specific volume of 170 cm.sup.3 / g, and the number of the fiber lumps of 3.8 lumps per 20 g. The results are shown in Table 1.

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Abstract

A non-woven fabric comprising staple fibers, having a fiber length of 3 to 25 mm and a single fiber fineness of 1 to 100 denier, and is produced by the fibers being dropped while being dispersed to be accumulated and adhered at the intersection point of the staple fibers. The non-woven fabric has a specific volume of 40 to 200 cm3 / g, and the number of fiber lumps having a volume of not less than 1 mm3 is not more than 5 lumps per 20 g of the non-woven fabric. The bulky non-woven fabric of the present invention in which the sufficient contribution to bulkiness by fibers is exhibited is suitable for sanitary materials, such as disposable diapers, sanitary napkins, incontinence pads, nursing pads or the like, or wipes etc.

Description

[0001] The invention relates to a non-woven fabric comprising staple fibers. More specifically, it relates to a non-woven fabric comprising staple fibers, which is suitable for sanitary materials such as disposable diapers, sanitary napkins, incontinence pads, nursing pads or the like, or wipers, and to absorbent articles using the non-woven fabric comprising staple fibers.[0002] Hitherto, as this kind of non-woven fabric comprising staple fibers, Japanese Patent Publication No. Sho 52-12830 discloses a non-woven fabric produced by a process wherein thermal adhesive conjugated fibers are aligned by the use of a carding machine and then piled up and entangled to be adjusted to the predetermined basis weight, followed by conducting a thermal adhesion between fibers by a thermal treatment.[0003] However, the above mentioned conventional non-woven fabrics lose the bulkiness of the non-woven fabric contributed by fibers, because the fibers of the non-woven fabric are arranged in the mach...

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): D04H1/542D04H1/62
CPCD04H1/54D04H1/5405D04H1/62Y10T442/633Y10T442/629Y10T442/641Y10T442/627Y10T442/632Y10T442/69D04H1/5412D04H1/5418D04H1/5414
Inventor NAGANO, KOKIHIRABAYASHI, SHIGERU
Owner CHISSO CORP
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