Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of ultra-high molecular weight polyethylene film split fiber and its preparation method

An ultra-high molecular weight, polyethylene film technology, applied in the field of polyethylene fibers, can solve the problems of easy fuzzing, breakage, winding rolls, and low degree of fibrillation

Active Publication Date: 2020-10-27
QINGDAO ZHONGKEHUALIAN ADVANCED MATERIAL CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since polyethylene material is a highly crystalline material, the film-split fiber prepared by the traditional film-split method has poor uniformity and stability of fiber product fineness, low degree of fibrillation, and easy fluff and breakage during the fibrillation process. and winding rolls and other defects

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
  • A kind of ultra-high molecular weight polyethylene film split fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The embodiment of the present invention provides a method for preparing ultra-high molecular weight polyethylene split fibers, comprising the following steps:

[0022] S1: Put polyethylene in a reaction kettle for melting, extrude the polyethylene melt through a twin-screw at a certain speed and a die, cool and crystallize the polyethylene melt on the surface of a cold roll at a certain speed to obtain a cast sheet .

[0023] S2: The cast sheet is preheated and stretched bidirectionally synchronously, and then after being recovered by the extractant, it is dried and shaped to obtain a polyethylene microporous diaphragm.

[0024] In this step, under the action of biaxial stretching, from the microscopic point of view, the disordered molecules and molecular segments are gradually arranged in an orderly manner; from the macroscopic point of view, the film does not contact any roller during the stretching process. Therefore, a film without scratches can be obtained without...

Embodiment 1

[0035] Put polyethylene with a molecular weight of 600,000-2,000,000 in a reactor for melting, extrude the polyethylene melt through a twin-screw and die head at 100-150 rpm, and transfer the polyethylene melt at 4-7 rpm / min of chilled roll surface cooling and crystallization to obtain cast sheets;

[0036] After the cast sheet is preheated at 180-200°C, it is stretched in two directions synchronously. The longitudinal stretching ratio is 1-3 times, and the transverse stretching ratio is 4-8 times. After being recovered by the extractant, it is dried and shaped to obtain Polyethylene microporous membrane;

[0037] Cut the polyethylene microporous membrane into strips of 0.5-0.8 cm, and after drying, perform longitudinal stretching again at 110-120°C at a high temperature of 10 times to obtain ultra-high molecular weight polyethylene split fibers 1.

Embodiment 2

[0039] Put polyethylene with a molecular weight of 600,000-2,000,000 in a reactor for melting, extrude the polyethylene melt through a twin-screw and die head at 100-150 rpm, and transfer the polyethylene melt at 4-7 rpm / min of chilled roll surface cooling and crystallization to obtain cast sheets;

[0040] After the cast sheet is preheated at 180-200°C, it is stretched in two directions synchronously. The longitudinal stretching ratio is 1-3 times, and the transverse stretching ratio is 4-8 times. After being recovered by the extractant, it is dried and shaped to obtain Polyethylene microporous membrane;

[0041] Cut the polyethylene microporous diaphragm into 0.5-0.8 cm strip diaphragms, after drying, carry out longitudinal stretching again at 110-120°C at a high temperature, and the stretching ratio is 11 times to obtain ultra-high molecular weight polyethylene film split fibers 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
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
tensile strengthaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides ultra-high molecular weight polyethylene split-film fiber and a preparation method thereof, and belongs to the field of polyethylene fiber. The split-film fiber obtained throughthe preparation method has the advantages of being high in strength, high in fibrillation degree and the like. According to the technical scheme, the method comprises the steps that polyethylene is put into a reaction kettle for melting, polyethylene melt is extruded through a twin screw with a certain rotation speed and a die head, the polyethylene melt is cooled, crystallized and shaped on thesurface of a cold roller with a certain rotation speed, and a casting piece is obtained; the casting piece is preheated, subjected to bidirectional synchro-draw, subjected to extraction agent recoveryand then dried and shaped to obtain a polyethylene micropore diaphragm; the polyethylene micropore diaphragm is sliced into a strip-shaped diaphragm being 0.5-0.8 cm, after drying is conducted, high-temperature longitudinal stretching is conducted again, and the ultra-high molecular weight polyethylene split-film fiber is obtained. The obtained ultra-high molecular weight polyethylene split-filmfiber can serve as an environmentally-friendly novel material to be applied to the fields of air filter materials, body armors and the like.

Description

technical field [0001] The invention belongs to the field of polyethylene fibers, in particular to an ultra-high molecular weight polyethylene split fiber and a preparation method thereof. Background technique [0002] The manufacturing process of fiber nonwoven materials is divided into 6 processes of fiber preparation, web forming, bonding, heat setting, finishing and packaging. The production process includes dry method, wet method, spinning method, acupuncture method, stitching method , spunbond method, melt blown method, film splitting method and electrospinning method, etc. [0003] The film splitting method to prepare fibers is a new technology for processing synthetic fibers. It uses the film to be stretched at a high power, and the molecular orientation is balanced. The axial strength is increased, and the weft strength is reduced to the limit. Intrinsic characteristics of the fiber, the polymer is melted and extruded into a multi-channel longitudinal thermal stret...

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 Patents(China)
IPC IPC(8): D01D13/00D01D5/42D01D5/12D01F6/04
CPCD01D5/12D01D5/426D01D13/00D01F6/04D10B2321/021D10B2501/04D10B2505/04
Inventor 郅立鹏陈继朝公言飞胡一波许志浩厉勇杨波
Owner QINGDAO ZHONGKEHUALIAN ADVANCED MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com