Nonwoven fabric and fiber product

a nonwoven fabric and fiber technology, applied in the field of spun bonding nonwoven fabrics, can solve the problems of easy end breakage, unstable spinnability and moldability, etc., and achieve the effect of improving the flexibility of nonwoven fabrics and the stability of spinning fibers

Inactive Publication Date: 2016-02-04
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0031]According to the present invention, in the spunbonded nonwoven fabric composed of a core-sheath composite fiber, spinning stability of the fiber and flexibility of the nonwoven fabric can be improved.

Problems solved by technology

But, the use of polyethylene for the sheath component encounters a problem that end breakage occurs frequently on the spinning line in nonwoven fabric molding, so that spinnability and moldability are not stable.
However, in the fiber disclosed in the above-cited PTL 1, a weight ratio of the low-crystalline polypropylene is large, so that end breakage is easy to occur.

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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Examples

Experimental program
Comparison scheme
Effect test

example 1

(Preparation of Core Component)

[0123]80% by mass of a propylene-based resin (B) (PP3155, manufactured by ExxonMobil Chemical) having a melt flow rate (MFR), as measured under conditions at a temperature of 230° C. and a load of 2.16 kg in conformity with ASTM D1238, of 36 g / 10 min was compounded with 20% by mass of a propylene-based resin (A) (L-MODU (a registered trademark) S901, manufactured by Idemitsu Kosan Co., Ltd.) having a melt flow rate (MFR), as measured under conditions at a temperature of 230° C. and a load of 2.16 kg in conformity with JIS K7210, of 50 g / 10 min and a melting point of 70° C., thereby preparing a core component.

(Preparation of Sheath Component)

[0124]Only an ethylene-based resin (ASPUN 6834, manufactured by The Dow Chemical Company) having a melt flow rate (MFR), as measured under conditions at a temperature of 190° C. and a load of 2.16 kg in conformity with ISO 1133, of 17 g / 10 min and a melting point of 130° C. was used, thereby preparing a sheath compo...

example 2

[0133]A nonwoven fabric was molded in the same manner as that in Example 1, except that in Example 1, a material obtained by mixing 50% by mass of the propylene-based resin (B) and 50% by mass of the propylene-based resin (A) was used as the core component, and the cabin pressure was changed to 7,500 Pa, and then evaluated in the same way. The results are shown in Tables 1 and 2.

example 3

[0136]A nonwoven fabric was molded in the same manner as that in Example 1, except that in Example 1, the core component and the sheath component were discharged in a mass ratio of 50 / 50 and spun, and the cabin pressure was changed to 6,000 Pa, and then evaluated in the same way. The results are shown in Tables 1 and 2.

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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Abstract

Provided is a spunbonded nonwoven fabric comprising a core-sheath composite fiber having a core part composed of a core component containing a propylene-based resin (A) satisfying the following (a) to (e) and a sheath part composed of a sheath component containing an ethylene-based resin. (a) [mmmm]=20 to 60 mol %, (b) [mm]×[rr]/[mr]2≦2.0, (c) weight average molecular weight (Mw)=10,000 to 200,000, (d) molecular weight distribution (Mw/Mn)<4.0, and (e) a melting point (Tm-D), as defined as a peak top of a peak observed on the highest temperature side of a melting endothermic curve which is obtained by holding under a nitrogen atmosphere at −10° C. for 5 minutes and then increasing the temperature at a rate of 10° C./min with a differential scanning calorimeter (DSC), is from 0 to 120° C.

Description

TECHNICAL FIELD[0001]The present invention relates to a spunbonded nonwoven fabric composed of a core-sheath composite fiber.BACKGROUND ART[0002]In recent years, polyolefin based fibers and nonwoven fabrics are used for various applications, such as a disposable diaper, a sanitary product, a hygienic product, a clothing material, a bandage, a packaging material, etc. The fibers and nonwoven fabrics are often used for applications in which they come into direct contact with the body, and thus, in recent years, a required performance regarding good wear feeling to the body and hand touch feeling are being more increased. For this reason, with respect to the nonwoven fabrics, technological development related to an improvement of texture for good wear feeling, reduction in basis weight for weight reduction of products, and the like is demanded. In order to improve these performances, optimization of a structure or composition of fibers constituting the nonwoven fabric, improvement of s...

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(United States)
IPC IPC(8): D04H1/4382D04H1/4291D04H1/724D04H3/007D04H3/033D04H3/147
CPCD04H1/4291D04H3/147D04H1/4382D04H1/724D10B2501/00D04H3/007D10B2321/022D10B2321/021D10B2509/02D04H3/033D01F8/06C08L23/14C08L2203/12C08L2205/025D04H1/43828
Inventor KOORI, YOHEITAKEBE, TOMOAKIMINAMI, YUTAKA
Owner IDEMITSU KOSAN CO LTD
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