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Polypropylene non-woven fabric

A technology of non-woven fabric and homopolypropylene, which is applied in the field of spun-bonded non-woven fabrics, can solve the problem of not considering the strength of the heat-sealed part, the strength of the heat-sealed part, the softness of the heat-sealed part, and the spinning temperature of the spun-bonded non-woven fabric. Relationship and other issues, to achieve the effect of sufficient heat sealing strength

Active Publication Date: 2017-05-24
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] That is, at present, the strength of the heat-seal portion when the spunbonded nonwoven fabric is used as a surface material of a diaper or the like in the diaper manufacturing process, the sufficient strength of the heat-seal portion when the diaper is worn, and the softness of the heat-seal portion have not been considered at all. In addition, there is no study on the relationship between the heat sealability and the temperature at the time of spinning the spunbonded nonwoven fabric (for example, refer to the following patent documents 1 and 2)

Method used

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  • Polypropylene non-woven fabric
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Polypropylene resin with an MFR of 60g / 10min (measured at a temperature of 230°C and a load of 2.16kg in accordance with JIS-K7210) was spunbonded to a nozzle diameter of 0.4mm and a single hole discharge rate of 0.56g / min·hole 1. Extrude at a spinning temperature of 205°C, and use a high-speed airflow traction device using an air jet to draw the filament group to prepare a long-fiber woven sheet with an average single filament fineness of 1.5 dtex.

[0078] Next, pass the obtained woven piece between the smooth roller and the embossing roller (pattern specifications: diameter 0.425mm circular, zigzag arrangement, horizontal spacing 2.1mm, vertical spacing 1.1mm, crimping area ratio 6.3%), at temperature Bond the fibers to each other at 135°C and a linear pressure of 35kgf / cm to obtain a weight per unit area of ​​17g / m 2 spunbond nonwoven fabric. Table 1 shows the evaluation results of the obtained spunbond nonwoven fabric together with the production conditions.

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Embodiment 2

[0082] Adjust the ejection amount in Example 1 to obtain an average monofilament fineness of 2.0dtex and a weight per unit area of ​​11g / m 2 spunbond nonwoven fabric. Table 1 shows the evaluation results of the obtained spunbond nonwoven fabric together with the production conditions.

[0083] The obtained spunbonded nonwoven fabric was used to produce a pant-type diaper for adults, and the same wearing evaluation as in Example 1 was implemented. As a result, putting on and taking off was carried out five times, and the heat-sealed portion was not damaged during wearing, showing sufficient strength. Especially in Example 2, regarding the adhesion of the heat-sealed part to other constituent materials of the diaper, not only the adhesiveness of the heat-sealed part was strong and it was difficult to peel off, but also a diaper was obtained in which the heat-sealed part was still soft.

Embodiment 3

[0085] Adjust the ejection amount in Example 1 to obtain an average monofilament fineness of 1.1dtex and a weight per unit area of ​​18g / m 2 spunbond nonwoven fabric. Table 1 shows the evaluation results of the obtained spunbond nonwoven fabric together with the production conditions.

[0086] The obtained spunbonded nonwoven fabric was used to produce a pant-type diaper for adults, and the same wearing evaluation as in Example 1 was implemented. As a result, the same results as in Example 1 were obtained.

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Abstract

A nonwoven fabric characterized in that it comprises fibers mainly composed of homopolypropylene, the MFR of the fibers is not less than 30 g / 10 minutes and not more than 65 g / 10 minutes, and the average single filament fineness of the fibers is not less than 0.5 dtex And 3.5dtex or less, the unit area weight of the non-woven fabric is more than 5g / m2 and less than 40g / m2, the thermal compression bonding area ratio of the non-woven fabric is more than 5% and less than 15%, and the temperature of the heating plate is 136 ℃ The heat seal strength of the non-woven fabric measured under certain conditions is above 6N / 25mm.

Description

technical field [0001] The present invention relates to a nonwoven fabric comprising polypropylene-based fibers. More specifically, the present invention relates to a polypropylene-based fiber that is excellent in heat-sealability and flexibility and is suitable for use as a front sheet, a back sheet, and a side gather portion of an absorbent article used as a hygienic material. spunbond nonwoven fabric. Background technique [0002] In recent years, the popularity of disposable paper diapers has been remarkable, and the production volume has also increased rapidly. For disposable diapers in such an environment, loss reduction in the manufacturing line and stable quality are important. In the diaper manufacturing line, various raw materials can be combined by bonding with heat, heat-sealing, heat lamination, hot melt coating, etc., to manufacture diaper products. In particular, in a pull-on diaper, the side portions are welded and bonded by heat sealing, and strength that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/007A61F13/49A61F13/511A61F13/514D04H3/16
CPCD04H3/007D04H3/16A61F13/511A61F13/514
Inventor 中东登志子税所一哉矢放正广
Owner ASAHI KASEI KK