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Polypropylene fibers and spunbond nonwoven with improved properties.

A polypropylene fiber and polypropylene technology, applied in the direction of single-component polypropylene rayon, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve the problem of reduced swelling of extruded products, low resistance to fiber pull Extensibility, low melt elasticity, etc.

Inactive Publication Date: 2010-01-06
TOTAL RES & TECH FELUY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] While not wishing to be bound by theory, it is believed that under the processing conditions used in the manufacture of spunbond nonwovens, the narrowing of the molecular weight distribution results in a lower Melt elasticity, which in turn leads to reduced extrudate swell (dieswell) and lower resistance to fiber stretch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] testing method

[0036] Melt flow index is measured according to standard ISO 1133, condition L using a weight of 2.16 kg and a temperature of 230°C.

[0037] The molecular weight of the samples was measured using gel permeation chromatography (GPC). The samples were dissolved in 1,2,4-trichlorobenzene. The resulting solution was injected into gel permeation chromatography and analyzed under conditions well known in the polymer industry.

[0038] Fiber titer was measured on a Zweigle vibrating titer S151 / 2 according to standard ISO 1973:1995.

[0039] Fiber tenacity and elongation were measured on a Lenzing Vibrodyn according to standard ISO 5079:1995 at a test speed of 10 mm / min.

[0040] Tensile strength and elongation of nonwovens were measured according to ISO 9073-3:1989.

[0041] Polypropylene

[0042] Fibers and nonwovens were produced using the polypropylene homopolymer PP1 with a melt flow index of 60 dg / min according to the invention, and as a comparative...

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PUM

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Abstract

The present invention relates to a process for the production of polypropylene fibers and polypropylene spunbond nonwoven comprising a degradation step, wherein the melt flow of the polypropylene is increased, and a fiber or filament extrusion step. The present invention also relates to the fibers and nonwoven produced with said process and to composites and laminates comprising said fibers and nonwoven.

Description

technical field [0001] The present invention relates to a process for the manufacture of polypropylene fibers and polypropylene spunbond nonwovens with improved properties. The invention also relates to fibers and nonwovens produced by said method. In addition, the present invention relates to composites and laminates comprising such fibers and nonwovens. Background technique [0002] Polypropylene has become one of the most widely used polymers in fibers and nonwovens. Due to its versatility and good mechanical and chemical properties, polypropylene is well suited to meet the needs of many different applications. Polypropylene fibers and nonwovens are used, for example, in construction and agriculture, hygiene and medical articles, carpets, textiles. [0003] The melt flow index of polypropylene for fibers and nonwovens can vary from 5 dg / min (for very tough high tenacity fibers) up to several thousand dg / min (for meltblown nonwovens) depending on the manufacturing metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/06D01D5/098D01F6/30D04H3/16D04H3/007
CPCD04H3/007D04H3/16D01F6/06Y10T442/681D01F6/30
Inventor 休格斯·豪布拉格吉劳姆·佩维
Owner TOTAL RES & TECH FELUY