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Double component filaments, nonwoven net containing them and forming method thereof

A two-component, woven fiber web technology, applied in the direction of nonwovens, rayon manufacturing, textiles and paper, can solve the problem of increasing energy demand

Inactive Publication Date: 2003-04-02
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, heating the gas to such high temperatures would greatly increase the energy requirements of production

Method used

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  • Double component filaments, nonwoven net containing them and forming method thereof
  • Double component filaments, nonwoven net containing them and forming method thereof
  • Double component filaments, nonwoven net containing them and forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0087] A spunbond bicomponent filament web having a basis weight of 2.6 ounces per square yard was produced by the method described in US Patent 5,382,400 to Pike et al. The bicomponent filaments used to make the web comprise a polyethylene component and a polypropylene component, arranged in a side-by-side configuration. The polyethylene used to make the filaments was ASPUN XU61800, supplied by Dow Chemical Company.

[0088] On the other hand, the polypropylene used to make the filaments was ESCORENE 3445, supplied by Exxon Corporation, which also contained 2 wt% titanium dioxide. According to the present invention, the polypropylene also contains 2.5% by weight of MASIL SF-19 nonionic ethoxylated silicone surfactant, supplied by PPG Industries. The nonionic surfactant added to the polypropylene according to the invention acts as a curl enhancing additive.

[0089] The polypropylene and polyethylene components were fed separately into the respective extruders. The extruded...

example 2

[0094] The process described in Example 1 for making bicomponent filaments and making nonwoven webs from the filaments was repeated. However, in this example, instead of MASIL SF-19 nonionic surfactant, ANTAROX BL-214 supplied by Rhone Planck was used. ANTAROX BL-214, an ethoxylated alkyl ether, was added to the polypropylene component in an amount of 3 wt%.

[0095] During production, the fiber draw (suck) pressure was 3 psi, the polymer throughput was 0.5 ghm, and the through-air bonder temperature was 250°F. During drawing, the tow is exposed to air at a temperature of only about 54°F to crimp the tow. The tow was drawn to a thickness of about 2.2 denier.

[0096] The resulting fabric has a basis weight of 3.5 ounces per square yard and a density of 0.020.g / cm 3 .

[0097] Similar to the fabric prepared in Example 1, the nonwoven web prepared with ANTAROX BL-214 was found to have high loft and was instantly wettable with water. It was also observed that the bicomponent...

example 3

[0099] The procedure described in Example 2 was repeated. Specifically, the polypropylene component still contained 3 wt% ANTAROX BL-214 nonionic surfactant. Unlike Example 2, however, the polymer throughput through the spin pack was 0.4 ghm.

[0100] In this example, the filament has a denier per filament of 1.7 and the resulting fabric has a basis weight of 3.1 ounces per square yard and a density of 0.021 g / cm 3 . Again, a nonwoven web with considerable loft was produced and it was instantly wettable with water. It was also found in this example that low denier filaments can be produced in accordance with the present invention which can still be highly crimped simply by exposing the filaments to air near room temperature.

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Abstract

Spunbond multicomponent filaments and nonwoven webs made from the filaments are disclosed. In accordance with the present invention, the multicomponent filaments contain a crimp enhancement additive. Specifically, the crimp enhancement additive is added to one of the polymeric components in order to accelerate its solidification rate. The additive enhances crimp, allows for highly crimped filaments to be made at smaller deniers, and produces low density webs with improved stretch and cloth-like properties. Specifically, the additive incorporated into the filaments is a nonionic surfactant such as an alkyl ether alkoxylate, a siloxane alkoxylate, an ester of a polyalkylene glycol, a polysaccharide derivative, a glycerol ester, or mixtures thereof.

Description

field of invention [0001] In general, the present invention relates to spunbond multicomponent filaments and nonwoven webs made from the filaments. More specifically, the invention relates to the incorporation of an additive into one of the polymers used to make multicomponent filaments. The additive enhances crimp, allows deniers to be made smaller, generally simplifies the process of imparting natural crimp to filaments, and produces webs with improved elasticity and fabric-like properties. Specifically, the additive incorporated into the filament is a nonionic surfactant. Background of the invention [0002] Nonwovens are used in the manufacture of a wide variety of products where specific levels of softness, strength, uniformity, liquid handling capabilities such as absorption, and other physical properties are desired. Such products include various wipes, industrial wipes, incontinence products, filter media products, baby care products such as baby diapers, absorbent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/10D01F8/06D04H3/16
CPCD04H3/16D01F8/06D01F1/10Y10T428/24826Y10T428/2927Y10T428/2929Y10T442/69Y10T442/635Y10T442/698Y10T442/609Y10T442/627Y10T442/629Y10T442/681Y10T442/641D01F8/04
Inventor X·凝S·E·马蒙
Owner KIMBERLY-CLARK WORLDWIDE INC
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