Thermoplastic non-woven fabric

A technology of non-woven fabrics and thermoplastic fibers, which is applied in the direction of non-woven fabrics, textiles, papermaking, bandages, etc., which can solve the problems of non-woven fabrics, such as the difficulty of dimensional changes in softness and width, poor softness, etc., and reduce the insufficient coating width , low size change, and small width size change

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, relying on the existing means of suppressing the dimensional change of the width of the non-woven fabric is poor in flexibility when used in sanitary materials, and it is very difficult to balance the flexibility of the non-woven fabric with the dimensional change of the width.

Method used

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  • Thermoplastic non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] 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. Extruded under the condition of spinning temperature of 215°C, the filament group was drawn by a high-speed airflow traction device based on air jets, and extruded towards the moving collection surface in a manner with a longitudinal pattern length of 110 mm, to prepare an average single yarn denier of 1.5 Long fiber web of dtex.

[0082] 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 to obtain a weight per unit area of ​​17g / m 2 long-fiber nonwovens.

Embodiment 2

[0084] Set the single-hole ejection amount as 0.90g / min·Hole, and the length of the longitudinal pattern as 250mm, and operate in the same manner as in Example 1 to obtain an average single yarn fineness of 2.0dtex and a weight per unit area of ​​11g / m 2 long-fiber nonwovens.

Embodiment 3

[0086] The length of the longitudinal pattern is set to 75mm, and the same operation as in Example 1 is obtained to obtain an average single yarn fineness of 1.1dtex and a weight per unit area of ​​25g / m 2 long-fiber nonwovens.

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Abstract

Provided is a non-woven fabric that has high width dimensional stability, superior flexibility, and favorable workability, and that is suitable as a top sheet, back sheet, side gathering section, or the like of an absorbent article used in a sanitary item. The non-woven fabric comprises a thermoplastic fiber and is characterized by the fiber orientation in the non-woven fabric being 1.05-2.0 inclusive by the MOR value of the degree of molecular orientation, and the stress when extended 3% of the non-woven fabric being 2-10 N / 5cm inclusive.

Description

technical field [0001] The present invention relates to nonwoven fabrics formed from thermoplastic fibers. In more detail, the present invention relates to a top sheet, a back sheet, a side collection part, etc. of an absorbent article suitable for use in hygienic materials, and having high width dimensional stability and softness. A nonwoven fabric made of thermoplastic fibers that is excellent and has good processability. 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 the diaper production line, when the width and dimension of the nonwoven fabric used as the raw material change, wrinkles and zigzags will occur, and in the process of laminating the film, deviation from the film will occur. Insufficient coating width, hot melt adhered to each...

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