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

A two-step continuous production method for preparing colored polyimide fibers

A colored polyimide fiber and polyamic acid technology, applied in fiber treatment, fiber chemical characteristics, dyeing method, etc., can solve the problems of polyimide surface inertness, etc., to overcome poor adsorption capacity, facilitate industrial production, good adhesion effect

Active Publication Date: 2020-01-14
DONGHUA UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for the continuous production and preparation of colored polyimide fibers by a two-step method. Polyimide fiber has broad application prospects in many fields such as electronics and fire protection

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 two-step continuous production method for preparing colored polyimide fibers
  • A two-step continuous production method for preparing colored polyimide fibers
  • A two-step continuous production method for preparing colored polyimide fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using the "two-step method" dry-jet wet spinning technology, the polyamic acid solution (solvent is DMAc) with a solid content of 15% pyrophthalic anhydride / 4,4'-diaminodiphenyl ether structure is used as the spinning stock solution, and after coagulation Bath molding, the coagulation bath is ethanol / water (1 / 1, v / v), washed with water, dried with hot air at 60°C, and dyed. The dyeing solution is composed of polyimide resin with 5% solid content, and the structural formula is as follows:

[0037]

[0038] The pigment is phthalocyanine blue, accounting for 2% of the total mass of the solution, the solvent is tetrahydrofuran, and the temperature of the dyeing solution is 30°C; after dyeing, it is dried with hot air at a temperature of 80°C, and then pre-dried at 50°C for 6 hours , cyclization at 110°C for 1h, and cyclization at 280°C for 1h to obtain blue polyimide fibers. The thermal decomposition temperature of the obtained blue polyimide fiber is higher than 490°C, ...

Embodiment 2

[0040] Using the "two-step method" dry-jet wet spinning technology, the polyamic acid solution with a solid content of 13.5% biphenyl dianhydride / p-phenylenediamine structure (the solvent is DMAc) is used as the spinning stock solution, which is formed by a coagulation bath, and the coagulation bath It is DMAc / water (1 / 1, v / v), washed with water, dried with hot air at 70°C, and dyed. The composition of the dyeing solution is: polyimide resin with 3% solid content, and the structural formula is as follows:

[0041]

[0042] The pigment is Cosmetic Pink RC01 (pigment red 181), accounting for 1% of the total mass of the solution, the solvent is DMAc, and the temperature of the dyeing solution is 80°C; after dyeing, it is dried with hot air at a temperature of 80°C, and then dried at a temperature of 50°C Pre-dried for 8 hours, cyclized at 110° C. for 1 hour, and cyclized at 310° C. for 1 hour to obtain orange polyimide fibers. The thermal decomposition temperature of the obtai...

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
thermal decomposition temperatureaaaaaaaaaa
thermal decomposition temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing colored polyimide fibers through two-step continuous production. The preparation method comprises the following steps: spinning a polyamide acid solution in an N2 environment, molding, washing, dyeing, winding, pre-drying, and performing thermal cyclization / curing, thereby obtaining the colored polyimide fibers. The method disclosed by the inventionis simple and effective, industrialized production is conveniently realized, the problem of polyimide surface inertia is effectively solved, and the method has bright application prospects. A coatingcoloring adhesive has excellent adhesiveness with the polyamide acid and polyimide, the curing temperature is low, the pigment structure is not damaged, and polyimide fibers of multiple colors can besimply prepared. Moreover, according to the prepared colored polyimide fibers, the heat resistance, solvent resistance, dielectric properties and the like of the polyimide are not reduced, and application values of the polyimide in multiple fields such as electronics and fire prevention are not reduced.

Description

technical field [0001] The invention belongs to the field of polyimide spinning, dyeing and finishing processing, and in particular relates to a two-step continuous production method for preparing colored polyimide fibers. Background technique [0002] Polyimide fiber is a typical high-performance fiber. Based on the intrinsic properties of the fiber, polyimide fabric also has the characteristics of heat resistance, excellent mechanical properties, solvent resistance, radiation resistance, and good dielectric properties. Excellent comprehensive performance, can be used in composite materials, high temperature filtration, military aerospace, fire protection and other technical fields. [0003] At present, polyimide fabrics, such as clothing, non-woven fabrics, etc., have been applied in a certain scale in the fields of labor protection, fire protection, and body armor. Narrower levels. The polyimide fiber itself is mostly golden yellow, and some light yellow fiber varieties...

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): D01F6/74D01F11/08D06P3/02D06P1/52D01D5/00D06B15/00
CPCD01D5/00D01F6/74D01F11/08D06B15/00D06P1/5278D06P3/02
Inventor 张清华甘锋李琇廷董杰赵昕
Owner DONGHUA UNIV
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