Method for producing high-performance chopped fiber having fibrils, high-performance chopped fiber having fibrils, and articles comprising the same

A short-cut fiber, high-performance technology, applied in the direction of transportation and packaging, textiles and paper, friction linings, etc., can solve the problem that the screen is easy to clog, unsuitable for continuous operation, etc., and achieves the effect of simple implementation and low energy consumption

Inactive Publication Date: 2010-09-08
TEIJIN ARAMID BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sieves are prone to clogging during operation, so that the preparation, cutting, grinding and sieving method described in US 2003 / 0022961 A1 is interrupted after a certain time, after which the clogged sieves must be replaced or unclogged again
The preparation, cutting, grinding and sieving method described in US 2003 / 0022961 A1 is therefore not suitable for continuous operation

Method used

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  • Method for producing high-performance chopped fiber having fibrils, high-performance chopped fiber having fibrils, and articles comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] i) Making fibrillated para-aramid chopped fibers of the same length:

[0075] Teijin Twaron's 10003360dtex-type para-aramid filament yarn (2000 monofilament; yarn count = 3360dtex) was unwound from a drum, unwound, and under a pretension of 70cN / tex at a speed of 600m / min And with a pulling force of 10N, it is pulled twice through a conventional disc friction device with 8 FK6-32-255 friction discs (manufacturer: BARMAG AG; type code: FK6-32S-556Z, model 8E, with elastic yarn guide), where the rotational speed of the non-driven friction disc is set at 100 rpm by drawing the fiber through the disc friction machine. In the aforementioned disk-type friction equipment, 8 friction disks are arranged on 3 shafts, wherein 3 friction disks are respectively arranged on the first two shafts, and 2 friction disks are arranged on the third shaft. The distance of the friction discs from each other on the axis is about 2 cm. The shafts of the friction disks are arranged relative to...

Embodiment 2

[0088] Example 2 is carried out using steps i) to vi) in Example 1, but the difference is that in step i) of Example 2, para-position- Aramid filament yarn. The wear and average friction values ​​of the brake lining B2 obtained in Example 2 are likewise shown in the table below.

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Abstract

The invention relates to a method for producing high-performance chopped fiber having fibrils, comprising the steps a) preparing an organic high-performance filament yarn having a tensile strength of at least 10 g/dtex and a tensile elastic modulus of at least 150 g/dtex, b) fibrillation of the high-performance filament yarn in a dry yarn state, resulting in a high-performance filament yarn having fibrils, and c) cutting the high-performance filament yarn having fibrils resulting from step b) into high-performance chopped fibers having substantially the same length. The invention further relates to high-performance chopped fibers having substantially the same length, an article comprising said fibers and one or more fillers, and a method for producing such an article.

Description

technical field [0001] The present invention relates to a method for producing high performance chopped fibers with fibrils, high performance chopped fibers with fibrils and articles comprising high performance chopped fibers. Background technique [0002] High-performance fibers, i.e. fibers with high breaking strength and high tensile modulus of elasticity - for example fibers made of aramid, polyolefin, polybenzoxazole or polybenzothiazole - are well known as reinforcing fibers Used in numerous articles, eg in friction linings. In particular, high performance fibers require a high filler retention when they are used as reinforcing fibers in friction linings. [0003] The requirement of high filler retention is met by pulped high-performance fibers, for example by aramid pulp, the filler retention of which is about 80% measured by kaolin. [0004] Pulping of high-performance fibers is however a laborious, energy-intensive and rather expensive process. Described pulping ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J3/02F16D69/02
CPCF16D69/02D02J3/02D01G1/04Y10T83/0405Y10T428/2913
Inventor M·施密特G·沃特勒普
Owner TEIJIN ARAMID BV
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