Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for improving crimping performance of polyphenylene sulfide short fibers

A polyphenylene sulfide and short fiber technology, applied in fiber processing, fiber chemical characteristics, melt spinning, etc., can solve the problems of decreased fiber strength, inability to significantly improve fiber crimping performance, and crimper damage, etc., to avoid damage. Effect

Active Publication Date: 2021-01-29
SHAOXING YUCHEN NEW MATERIALS CO LTD +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, any equipment has its operating capacity limitation. Simply increasing the back pressure of the crimper will bring a larger load to the crimper, which will not only fail to significantly improve the fiber crimping performance, but will cause damage to the crimper
[0005] In addition, there is a balance relationship between the various properties of PPS fibers. When the fibers are crimped, the crimping knife will exert a certain force on the fibers, which will increase the internal stress of the fibers, resulting in a decrease in the strength of the fibers.

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving crimping performance of polyphenylene sulfide short fibers
  • Method for improving crimping performance of polyphenylene sulfide short fibers
  • Method for improving crimping performance of polyphenylene sulfide short fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The polyphenylene sulfide resin was melted and granulated by a twin-screw extruder to obtain polyphenylene sulfide chips, and then melt-spun by a single-screw extruder at a spinning temperature of 315°C and a discharge rate of 420g / min after vacuum drying. Silk, and pull with 750m / min pulling speed to obtain nascent fiber. After the obtained primary fibers are bundled by a cluster frame, the first drawing is carried out in a high-temperature oil bath at 95°C with a draw ratio of 3.0; then the second drawing is carried out in a steam oven with a draw ratio of 1.05; After the drawing is completed, the tow is preheated in a steam box for tension heat setting at 230°C and then crimped by a crimper. The back pressure of the crimper is 0.4MPa, the diameter of the cylinder is 160mm, and the number of fibers is 650,000. The force is 124N, and the fiber temperature is 135°C; after crimping, the heat setting machine is relaxed, the heat setting machine is shaped and the cutting m...

Embodiment 2～7

[0054] The weight-average molecular weight of the polyphenylene sulfide resin used in Examples 2-7, the fiber temperature at the entrance of the crimper, and the specific values ​​of various process parameters of the crimper are listed in Table 1 below. All the other steps are the same as in Example 1.

[0055] The physical property data of the polyphenylene sulfide short fibers prepared in each embodiment are also listed in Table 1 below.

[0056] Table 1

[0057]

[0058]

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
Login to View More

PUM

PropertyMeasurementUnit
elongation at breakaaaaaaaaaa
Curvatureaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for improving the crimping performance of polyphenylene sulfide short fibers. The method comprises the following steps of crimping polyphenylene sulfide short fibers by using a crimping machine under the conditions that the back pressure of the crimping machine is 0.30-0.5 MPa, the diameter of a back pressure cylinder of the crimping machine is 140-180mm, the number of fibers entering the crimping machine is 500,000-700,000, and the acting force of the back pressure cylinder on every ten thousand short fibers is 90-160N; the acting force of the back pressure air cylinder on every ten thousand short fibers is F, and the following formula (I) is met, Wherein P is the back pressure of the crimping machine, d is the diameter of the back pressure cylinder of thecrimping machine, and N is the number of fibers entering the crimping machine. According to the method for improving the crimping performance of the polyphenylene sulfide short fibers, the polyphenylene sulfide short fibers are endowed with excellent crimping property and mechanical property.

Description

technical field [0001] The invention relates to the field of fiber preparation, in particular to a method for improving the crimp performance of polyphenylene sulfide short fibers. Background technique [0002] The crimp property is an important index for evaluating short fibers, and it is also an important parameter affecting fiber quality and processing performance. Excellent crimping performance can increase the friction and cohesion between fibers, improve the spinnability of fibers, and at the same time provide better bulkiness and elasticity of fibers, thereby improving the wrinkle resistance of fabrics and giving them good hand feeling. [0003] In the short fiber production process, a crimping machine is usually used to give the fiber a certain crimp, and the most commonly used one is a stuffer box crimping machine, whose working principle is to use a pair of crimping rollers The roller feeds it into the crimping box, and then through the main pressure acting on the...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/76D01D5/084D01D5/08D01D5/12D06C7/02
CPCD01F6/765D01D5/084D01D5/12D01D5/08D06C7/02
Inventor 周贵阳沈佳丽俞孟飞王国伟黄平陈庆聪宁旭
Owner SHAOXING YUCHEN NEW MATERIALS CO LTD