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Non-woven fabric having superior heat stability and flexibility

A technology of non-woven fabrics and softness, applied in the direction of non-woven fabrics, textiles and papermaking, applications, etc., can solve problems such as poor softness, hardening of non-woven fabrics, difficulties in softness and thermal stability of non-woven fabrics, etc. Achieve excellent processability and good processability

Active Publication Date: 2013-12-18
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the existing methods for improving the thermal stability of non-woven fabrics have the following problems: for hygienic materials, the flexibility is poor, and it is very difficult to achieve both flexibility and thermal stability of non-woven fabrics.
However, in the method described in Patent Document 2, the texture of the nonwoven fabric becomes hard, which is not preferable for use in hygienic materials.

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 having superior heat stability and flexibility
  • Non-woven fabric having superior heat stability and flexibility
  • Non-woven fabric having superior heat stability and flexibility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] A polypropylene resin with an MFR of 60g / 10min (measured according to JIS-K7210 at a temperature of 230°C and a load of 2.16kg) is spunbonded through a nozzle diameter of φ0.4mm and a single hole discharge amount of 0.56g / min·Hole 1. Extrude under the condition of spinning temperature of 215°C, use a high-speed airflow traction device based on air jets for the filament group, draw under the conditions that the fiber temperature at the entrance of the traction device is 40°C, and the traction air speed is 17500m / min , and extrude towards the moving collection surface to prepare a long-fiber web with an average single yarn denier of 1.1 dtex.

[0094] Then, make the obtained fiber web pass between the flat roller and the embossing roller (pattern specification: diameter 0.425mm circle, staggered arrangement, horizontal spacing 2.1mm, vertical spacing 1.1mm, crimping area ratio 6.3%), at temperature The fibers are bonded to each other at 135°C and a linear load of 35kgf / cm...

Embodiment 2

[0096] Set the fiber temperature at the entrance of the traction device to 50°C, and the traction air wind speed to 15000m / min, and operate in the same manner as in Example 1 to obtain an average single yarn fineness of 1.5dtex and a weight per unit area of ​​11g / m 2 long-fiber nonwovens.

Embodiment 3

[0098] The single-hole ejection amount is set to 0.90g / min·Hole, the fiber temperature at the entrance of the traction device is set to 65°C, and the draft air velocity is set to 12500m / min, and the same operation as in Example 1 is performed to obtain an average single yarn denier of 2.0dtex, Weight per unit area 25g / m 2 long-fiber nonwovens.

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Abstract

Provided is a non-woven fabric that has high heat stability, superior flexibility, and favorable workability, and that is suitable as the top sheet, back sheet, or side gathering section of an absorbent article used in a sanitary item. The present invention relates to the non-woven fabric that comprises a polyolefin fiber and that is characterized by the crystallite size of the polyolefin fiber being 15-50 nm inclusive, and the bending flexibility of the non-woven fabric being 5-100 mm inclusive.

Description

technical field [0001] The present invention relates to a non-woven fabric formed of polyolefin-based fibers which is excellent in processability and is suitable for a top sheet, a back sheet, or a side collection part of an absorbent article used as a hygienic material . Background technique [0002] In recent years, the popularity of disposable diapers has been remarkable, and its production has gradually surged. As a disposable diaper in this environment, it is important to reduce the loss on the production line and to stabilize the quality. In a diaper production line, if the thermal stability of the nonwoven fabric used as a raw material is low, the width dimension of the nonwoven fabric will change during the lamination process with the film, and various problems such as wrinkles and bending will occur. Furthermore, in the heat-sealing process, the non-woven fabric itself shrinks and deforms due to the influence of heat from the heat-sealing roll, causing wrinkles an...

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): D04H3/007A61F13/15A61F13/49A61F13/511A61F13/514D04H3/16
CPCD04H1/4291A61F13/511A61F13/514D04H3/007D04H3/16
Inventor 税所一哉矢放正广上野郁雄
Owner ASAHI KASEI KK