Nitrile group type carbon fiber precursor spinning pretreatment process

A treatment process, nitrile-based technology, applied in textiles and papermaking, etc., can solve problems such as environmental pollution, waste of resources, low temperature resistance, etc., and achieve the effects of avoiding environmental pollution, avoiding waste, and recycling resources

Active Publication Date: 2016-03-23
SUZHOU SHARTEL SCI CO LTD
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of carbon fiber precursors, the yield of carbon fibers can only reach about 80% to 90%. Carbon fiber precursors cannot meet the standard of high-strength carbon fiber filaments. Their temperature resistance is lower than 400 degrees, their oxidation resistance is poo

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example 1: A nitrile-based carbon fiber precursor spinning pretreatment process, including the following steps. In S1, the nitrile-based carbon fiber precursor is continuously molded and crimped at room temperature, and the nitrile-based carbon fiber precursor is straightened. The rod shape is crimped by mechanical continuous moulding to change the friction of the fiber and increase the spinnability of the fiber. In S2, the negative pressure in the sizing furnace can reach 3000 Pa within 15 minutes, and the temperature can gradually reach 90°C within 5 minutes, which can gradually melt non-superior products and change the internal structure. Get modified. After the non-superior products are modified in S2, dry hot gas is injected into the setting furnace instantaneously, which can quickly solidify the molten nitrile-based carbon fiber precursor liquid to form a modified nitrile-based carbon fiber precursor, which can then be shaped.

[0012] Among them, the shaping furnac...

Example Embodiment

[0014] Embodiment 2: A nitrile-based carbon fiber precursor spinning pre-treatment process, including the following steps, S1: continuous compression molding and crimping of the nitrile-based carbon fiber precursor at room temperature; S2: nitrile-based carbon fiber precursor obtained by S1 The silk is put into the setting furnace, and the setting temperature is raised instantaneously under vacuum. The vacuuming time is 35mim, and the negative pressure reached is 3500pa. The temperature is raised during the vacuuming process, the heating time is 25min, and the temperature reached is 120℃. ; S3: Under S2 conditions, instantaneously inject dry hot gas into the shaping furnace to shape the obtained nitrile-based carbon fiber precursor.

Example Embodiment

[0015] Example 3: A nitrile-based carbon fiber precursor spinning pre-treatment process, including the following steps, S1: continuous compression molding and crimping of the nitrile-based carbon fiber precursor at room temperature; S2: nitrile-based carbon fiber precursor obtained from S1 The silk is put into the setting furnace, and the setting temperature is raised instantaneously under vacuum. The vacuuming time is 45m, the negative pressure reached is 4000pa, and the temperature is raised during the vacuuming process. The heating time is 45min, and the temperature reached is 125℃. ; S3: Under S2 conditions, instantaneously inject dry hot gas into the shaping furnace to shape the obtained nitrile-based carbon fiber precursor.

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

No PUM Login to view more

Abstract

The invention discloses a nitrile group type carbon fiber precursor spinning pretreatment process. According to the technical scheme, the process includes the following steps that 1, nitrile group type carbon fiber precursors are subjected to continuous mold pressing curling forming at normal temperature; 2, the nitrile group type carbon fiber precursors obtained in the step 1 are added to a shaping furnace and instantly heated to the shaping temperature in a vacuum state, the vacuumizing time ranges from 5 min to 45 min, achieved negative pressure ranges from 3,000 pa to 5,000 pa, temperature rise time ranges from 5 min to 45 min, and the achieved temperature ranges from 90 DEG C to 150 DEG C; 3, under the condition of the step 2, dry hot gas is instantly injected into the shaping furnace, and the obtained nitrile group type carbon fiber precursors are shaped. The purposes that non-superior products generated in the existing carbon fiber precursor production process are reused, and waste and environmental pollution are reduced are achieved.

Description

technical field [0001] The invention relates to a fiber production process, in particular to a pre-spinning treatment process for nitrile-based carbon fiber precursors. Background technique [0002] Carbon fiber is a new type of high-strength, high-modulus fiber material with a carbon content of more than 95%. Among them, a nitrile-based carbon fiber is made of carbon fiber precursors (high-purity polyacrylonitrile) after high temperature in a carbonization furnace. made at high pressure. In the production process of carbon fiber precursors, the yield of carbon fibers can only reach about 80% to 90%. Carbon fiber precursors cannot meet the standard of high-strength carbon fiber filaments. Their temperature resistance is lower than 400 degrees, their oxidation resistance is poor, and they do not have spinnability. The carbon fiber precursors of these unqualified products cannot be used as materials due to their substandard performance. It can only be discarded as a non-high...

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
IPC IPC(8): D02J13/00
CPCD02J13/00
Inventor 张永春
Owner SUZHOU SHARTEL SCI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap