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Flexible nonwoven fabric and lamiante thereof

A non-woven fabric, flexibility technology, applied in non-woven fabrics, fabrics, textiles and papermaking, etc., can solve the problems of inferior texture, inferior friction resistance, insufficient flexibility, etc.

Inactive Publication Date: 2005-06-08
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to insufficient flexibility, such nonwovens also have poor texture and poor abrasion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 1-3

[0037] In each example and comparative example, polypropylene (its MFR, Mw / Mn and ethylene content of structural units derived from ethylene are listed in Tables 1-3) and polyethylene (its MFR, Mw / Mn and density Listed in Table 1-3) and oleamide (0.3% by weight, contained in polyethylene) were melt-kneaded in different extruders respectively, and the resin kneaded in this way was obtained from one with 1093 conjugated spinnerets , the diameter of each spinneret is 0.6mm in the spinneret and sprayed at a speed of 1.0g / min per spinneret to produce a sheath-core conjugate long fiber comprising a polypropylene core and a polyethylene sheath , the polypropylene / polyethylene (A / B) weight ratio and fiber fineness of each fiber are listed in Table 1. The obtained sheath-core type conjugated long fibers were deposited directly on the collecting surface, and 20% of the area of ​​the deposited fiber web was embossed with a hot embossing roll so that the above fibers were entangled with e...

Embodiment 9-11 and comparative example 4

[0063] The nonwoven fabrics of Examples 1, 7 and 8 and Comparative Example 3 above were respectively laminated with the low-pressure low-density polyethylene (LLDPE) microporous films listed in Table 4 with a hot-melt adhesive to prepare laminates. Among them, LLDPE is ESPOIR produced by Mitsui Toatsu Chemical Co., Ltd., and the hot melt adhesive is a polyolefin produced by H.B Fuller Japan Co., Ltd.

[0064] The aesthetics of the resulting laminates were evaluated in a detector test by 10 test specimens. Laminates were evaluated according to the number of rough, hooked or prickly, and hard as indicated by the tester according to the following criteria:

[0065] ◎: 0,

[0066] ○: 1-2,

[0067] △: 3-5, and

[0068] X: 6 or more.

[0069] The results are listed in Table 4.

[0070] unit

[0071] Ethylene content: the content of ethylene structural units

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Abstract

The present invention provides a flexible nonwoven fabric comprising sheath-core type yoke long fibers comprising a core of high melting point resin and a sheath of polyethylene. In the fiber, the weight ratio of the high-melting point resin to polyethylene is 5 / 95 to 20 / 80, the fineness of the fiber is at most 3.0 denier, and the nonwoven fabric measured by the Clark method (method C in JIS L1096) is processed on a machine The sum of the bending resistance in direction and transverse direction is at most 80mm. The flexible nonwoven fabric has excellent texture and abrasion resistance. The present invention also provides laminates comprising the flexible nonwoven and a breathable film.

Description

technical field [0001] The present invention relates to flexible nonwoven fabrics and laminates thereof. More specifically, the present invention relates to a flexible nonwoven fabric having excellent flexibility and texture, which is very suitable for use as medical, sanitary materials such as disposable diapers, or as packaging materials and garments. industrial materials. Background technique [0002] Nonwoven fabrics made of polyethylene fibers are known to be highly flexible and excellent in texture (see JP-A-60-209010). However, polyethylene fibers are difficult to spin, and spinning of high-fineness polyethylene fibers is very difficult. Additionally, polyethylene fibers often melt when exposed to heat and / or pressure during the treatment of nonwovens with calender rolls, and during this treatment, these fibers often melt due to their insufficient strength. wound on a roll. The solution to this type of problem is the use of lower temperatures in the production of ...

Claims

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Application Information

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IPC IPC(8): D01F8/06D04H1/54
CPCD01F8/06D04H1/54Y10T442/637Y10T442/641Y10T442/678D01D5/34D04H3/147
Inventor 石井浩武居邦彦广重国卫
Owner MITSUI CHEM INC