Process for removing formaldehyde from synthetic protein fibres

A protein fiber and synthetic fiber technology, applied in the field of deformaldehyde from textile materials, can solve problems such as the harm of formaldehyde residues

Inactive Publication Date: 2002-10-30
胡宗善 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing the property of carbonyl on formaldehyde to make it react with sodium bisulfite to generate sodium hydroxysulfonate, thus solving the problem of the harmfulness of residual formaldehyde in the fiber after acetalization to the human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1, get 40kg of sodium bisulfite, dissolve it in 60kg of water, make its concentration 40%, heat up to 40°C, immerse the protein fiber after acetalization in the sodium bisulfite solution, soak for 10 minutes, then separate and shake Dry.

example 2

[0009] Example 2, get 80kg of sodium bisulfite, dissolve in 120kg of water, make its concentration 40%, heat up 50°C and put in the protein fiber after the acetal, the solution immerses the fiber as the criterion, soak for 7 minutes, then separate and spin dry.

example 3

[0010] Example 3, get 120kg of sodium bisulfite, dissolve it in 180kg of water, heat up at 60°C, put in the protein fibers after the acetalization, soak the fibers for 5 minutes, then separate and spin dry.

[0011] According to the needs of protein fibers immersed in acetal, any amount of sodium bisulfite aqueous solution can be prepared according to the above-mentioned 40% concentration ratio. The temperature is between 40°C and 60°C. Time is short, as long as you can fully respond. The method is simple and effective, and opens up bright prospects for the application of protein synthetic fibers.

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PUM

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Abstract

A process for removing formaldehyde from synthetic protein fibres to prevent the damage of residual formaldehyde to human body includes such steps as preparing 40% aqueous solution of sodium hydrogensulfite, washing the acetalized protein fibres with water, immersing in said aqueous solution at 40-60 deg.C for 5-10 min, water washing and centrifugal drying. Its advantages are high effect, simpleprocess, and bleaching action.

Description

1. Technical field [0001] The invention relates to a method for removing formaldehyde from textile materials, in particular to a method for removing formaldehyde from protein synthetic fibers synthesized from protein and polyvinyl alcohol. 2. Background technology [0002] The currently listed soybean protein fiber is a protein fiber synthesized from soybean protein and polyvinyl alcohol. This protein fiber after spinning, stretching and heat treatment has good mechanical properties, but the hot water resistance of the fiber is still poor, and its shrinkage rate is too large in water close to the boiling point. In order to improve the hot water resistance of the fiber, it is necessary to carry out acetalization treatment, so that the macromolecular hydroxyl group of polyvinyl alcohol and the hydrophilic group of protein interact with aldehyde to make it closed. In industrial production, formaldehyde is generally used for acetalization of protein fibers. The residual amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/02
Inventor 胡宗善宋惠远
Owner 胡宗善
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