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Preparation process of modified water-resistant fibers

A preparation process and fiber technology, applied in the field of preparation technology of modified water-resistant fibers, can solve the problems of respiratory irritation, operation mode limitation, inducing bronchial asthma, etc., and achieve the effect of good breaking strength

Active Publication Date: 2020-06-23
ZHEJIANG HONGYU MEDICAL COMMODITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the polyvinyl alcohol fiber is treated with formaldehyde, due to the excessive irritation of formaldehyde, it is easy to cause greater irritation to human skin, mucous membranes, respiratory tract, etc.; and formaldehyde can be combined with protein, when high concentration formaldehyde is inhaled by the human body It is easy to cause severe irritation and edema to the respiratory tract, even induce bronchial asthma, and may also cause nasopharyngeal tumors, headache, dizziness, fatigue, nausea, vomiting, chest tightness, eye pain, sore throat, poor appetite , heart palpitations, insomnia, weight loss, memory loss, autonomic disturbances and a series of symptoms
To sum up, the operation method of using formaldehyde to treat polyvinyl alcohol to obtain high temperature and high humidity resistant polyvinyl alcohol fibers has great limitations

Method used

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  • Preparation process of modified water-resistant fibers
  • Preparation process of modified water-resistant fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: A kind of preparation technology of modified water-resistant fiber, comprises following operation steps:

[0047] Step 1, fully mixing the hexamethylolmelamine and cosolvent to form the first mixture;

[0048] Mix polyvinyl alcohol and water, heat up to 80°C to completely dissolve polyvinyl alcohol, and form a second mixture with a mass concentration of 16%; fully mix mirabilite, alkali, and water, wherein sodium sulfate accounts for 100% by mass of the third mixture The component content is respectively 30%, and the pH value of adding alkali to the third mixture is 7.5-11;

[0049] Step 2, fully mix the first mixture and the second mixture, keep warm at 80°C, adjust the pH value to 1.5-1.8 with acid, and obtain the spinning dope;

[0050] Step 3: Spinning the spinning dope, and the jetted fibers enter the third mixture with a temperature of 25°C for coagulation bath treatment, and the coagulation bath treatment time for each meter of jetted fibers is 0.2...

Embodiment 2-4

[0054] Example 2-4: A preparation process for modified water-resistant fibers, the difference from Example 1 is that sodium sulfate accounts for 32%, 35%, and 40% of the mass percentage of the third mixture, and alkali is added to The pH of the third mixture is 7.5-11. And the alkali in the spinning dope in embodiment 2-4 is sodium bicarbonate.

Embodiment 5

[0055] Example 5: A preparation process for modified water-resistant fibers, the difference from Example 1 is that in the first mixture in step 1, the mass percentage of hexamethylolmelamine is 10%, and the proportion of cosolvent The mass percent composition is 90%.

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Abstract

The present invention discloses a preparation process of modified water-resistant fibers. The process comprises the steps of 1, fully mixing hexamethylol melamine with a cosolvent to form a first mixture, mixing polyvinyl alcohol with water, performing heating until the polyvinyl alcohol is completely dissolved to form a second mixture, fully mixing mirabilite with the water, and adding alkali toensure that the pH value of a third mixture is 7.5-11; 2, fully mixing the first mixture with the second mixture, keeping the temperature of 80-95 DEG C, and regulating the pH value to 1.5-3.3 by using acid to obtain a spinning solution; 3, performing spinning on the spinning solution, and treating sprayed fibers in the third mixture to obtain nascent fibers; and 4, performing drawing treatment onthe nascent fibers under the high temperature condition to obtain the modified water-resistant fibers. The preparation process of the modified water-resistant fibers obtained in the process is high in treatment process safety and does not easily cause body injury to operators, and the obtained fibers have the good high-temperature and high-moisture resistant performance.

Description

technical field [0001] The invention relates to the technical field of fiber production, more specifically, it relates to a preparation process of modified water-resistant fiber. Background technique [0002] Polyvinyl alcohol fiber was first produced by Wacker Chemical Company in Germany in the early 1930s. Polyvinyl alcohol fiber is a polar material with good hydrophilicity and easy to form hydrogen bonds with water. And at a water temperature of 70-85°C, the polyvinyl alcohol fiber is prone to obvious deformation and shrinkage; in boiling water, the polyvinyl alcohol fiber will dissolve. The above-mentioned characteristics lead to great restrictions on the application of polyvinyl alcohol fibers. [0003] In 1939, Ichiro Sakurada and Masahide Yazawa of Japan, and Lee Seung-gi of North Korea treated the hydrophilic polyvinyl alcohol fiber with formaldehyde to produce heat-resistant polyvinyl formal fiber, which has high temperature resistance and high temperature resistan...

Claims

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Application Information

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IPC IPC(8): D01F6/50D01F1/10D01F11/06
CPCD01F6/50D01F1/10D01F11/06
Inventor 曾菊红
Owner ZHEJIANG HONGYU MEDICAL COMMODITY
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