Method of preparing melamine formaldehyde resin/polyvinyl alcohol flame-proof fiber

A technology of melamine and formaldehyde resin, which is applied in the manufacture of fire-retardant and flame-retardant filaments, short fiber formation, and conjugated synthetic polymer man-made filaments, etc., can solve the problems of low production efficiency and achieve high production efficiency, good whiteness, The effect of good flame retardant properties

Inactive Publication Date: 2007-08-15
SICHUAN UNIV +1
View PDF2 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents on melamine-formaldehyde fibers include European patents EP 93965-A and EP 221330-A. These two patents directly spin the resin obtained by condensation of modified melamine and formaldehyde to obtain flame-retardant fib

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

Embodiment 1

[0028] Melamine 80g, 87.6g of 37wt% formaldehyde aqueous solution (melamine and formaldehyde molar ratio is 1: 1.7) are added in the reactor with thermometer, stirrer and reflux condenser, adjust pH=8~9 with sodium hydroxide, in The temperature was 90° C. for 5 hours to obtain a colorless transparent viscous liquid with a resin solid content of 51 wt%. Mix 330g of 20wt% polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 99%) with the above-mentioned melamine formaldehyde resin solution at a temperature of 75°C, adjust the pH to 8-9 with sodium hydroxide, and filter under pressure at a temperature of 60°C , defoaming, transported to the spinneret hole with a diameter of 0.08mm by a metering pump, and the stock solution is sprayed into a saturated sodium sulfate aqueous solution with a temperature of 50°C and pH=3 in a thin stream through the spinneret hole to solidify and form, and the as-spun fiber is stretched 3 times Send it to a steam oven with a temperature ...

Embodiment 2

[0030] Add 80 g of melamine and 206 g of 37 wt % formaldehyde solution (the molar ratio of melamine to formaldehyde is 1:4) into a reactor equipped with a thermometer, a stirrer and a reflux condenser, adjust the pH to 8-9 with sodium carbonate, and set the temperature at 50 °C for 2 hours to obtain a colorless transparent viscous liquid with a resin solid content of 35 wt%. Mix 400g of 25wt% polyvinyl alcohol (polymerization degree 2000, alcoholysis degree 99%) with the above-mentioned melamine-formaldehyde resin solution at a temperature of 60°C, adjust pH=8 to 9 with sodium carbonate, pressurize and filter at a temperature of 40°C, and remove Bubble, transported to the spinneret hole with a diameter of 0.1mm by a metering pump, the stock solution is sprayed into a saturated sodium sulfate aqueous solution with pH=4 at 45°C in a thin stream through the spinneret hole to solidify and form, and the as-spun fiber is stretched 5 times and sent to the temperature Wet heat treatme...

Embodiment 3

[0032] Add 80 g of melamine and 77.2 g of 37 wt % formaldehyde solution (the molar ratio of melamine to formaldehyde is 1:1.5) into a reactor with a thermometer, a stirrer and a reflux condenser, adjust the pH=9 to 10 with triethanolamine, and React at 100°C for 5 hours to obtain a colorless transparent viscous liquid with a resin solid content of 52 wt%. Mix 330g of 20wt% polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 97%) with the above-mentioned melamine-formaldehyde resin solution at a temperature of 95°C, adjust the pH to 8-9 with sodium hydroxide, and filter under pressure at a temperature of 80°C , defoaming, transported to the spinneret hole with a diameter of 0.08mm by a metering pump, the stock solution is sprayed into a saturated sodium sulfate aqueous solution with a temperature of 48°C and pH=3 through the spinneret hole in a thin stream, and solidified, and the as-spun fiber is stretched 4 times Send it to a steam oven with a temperature of 90°...

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
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for producing melamine formaldehyde resin/polyvinyl alcohol flameproof fiber. The invention is characterized in that composing melamine and formaldehyde at the mole ratio as 1:1.2-1:6 and 50-100Deg. C into melamine formaldehyde resin water solution, to be mixed with the polyvinyl alcohol water solution at the solid content ratio as 2:8-8:2 to obtain spinning original liquid, then spinning and shaping the original liquid via general wet method, and treating solidifying bath via acid sodium sulfate saturated water solution, and the primary fiber is drawn, shaped via wet and heat method, washed, coiled, oiled, dried, and heated in dry condition to obtain the final melamine formaldehyde resin/polyvinyl alcohol flameproof fiber. The titer of said flameproof fiber is 10detex, while the strength is 1-3cN/dtex, the crack extended rate is 5-15%, the regain ratio is 5-10%, and the limit oxygen index is 30-45.

Description

technical field [0001] The invention relates to a method for manufacturing melamine-formaldehyde resin / polyvinyl alcohol flame-retardant fibers. It belongs to the field of flame-retardant fiber manufacture. Background technique [0002] At present, there are three flame retardant technical solutions for fibers: a. flame retardant blend spinning method, this method is to mix 5% to 40% flame retardant into the polymer by melting body or solution spinning method to obtain flame retardant fibers; b. flame retardant monomer copolymerization method, this method is to copolymerize the polymerizable monomer containing flame retardant elements with the main monomer to obtain a polymer with flame retardant properties, and then The polymer is spun to obtain a flame-retardant fiber; c. After-finishing method, this method is a method of attaching a flame retardant to the surface of the fiber by coating or cross-linking to obtain a flame-retardant fiber. The flame retardant blending met...

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): D01F1/07D01F8/16D01F8/10D01D1/02D01D5/06D01D5/26
Inventor 徐建军施楣梧姜猛进叶光斗李守群杨智渊卢奎林
Owner SICHUAN UNIV
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