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A kind of preparation method of pva/cellulose composite fiber

A composite fiber and cellulose technology, which is applied in radiation wave/microwave fiber treatment, cellulose/protein conjugated artificial filament, fiber treatment, etc., can solve the problem of insignificant crosslinking effect, reduced water resistance of composite fiber, and production environment Improve the spinning effect and working environment, improve the spinning efficiency, and improve the textile processability

Active Publication Date: 2020-12-01
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the pre-crosslinking of PVA solution is not easy to control the degree of crosslinking, resulting in a decrease in the water solubility of PVA, which affects the filtration performance of the subsequent blended spinning solution;
[0010] Aldehydes such as acetaldehyde used in further cross-linking baths have a strong pungent odor, causing deterioration of the production environment, polluting the environment, and the cross-linking effect is not obvious
[0011] (2) Reducing the number of crosslinks in the existing technology will greatly reduce the strength and modulus of the PVA / cellulose composite fiber, and will reduce the water resistance of the composite fiber

Method used

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  • A kind of preparation method of pva/cellulose composite fiber

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Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: A kind of preparation method of PVA / cellulose composite fiber

[0038] The specific preparation process of PVA / cellulose composite fiber with a specification of 1.33dtex*38mm is as follows: figure 1 shown.

[0039] Include the following steps:

[0040] (1) Preparation steps of spinning dope:

[0041]Dissolving polyvinyl alcohol with an average degree of polymerization of 500 to prepare a polyvinyl alcohol (PVA) solution with a mass fraction of 20%; adding the prepared PVA solution to the viscose solution prepared by the viscose method to obtain a spinning stock solution; The weight ratio of PVA in silk stock solution: cellulose A in viscose collagen solution is 10:90.

[0042] (2) Spinning forming step

[0043] The spinning stock solution is spun through the adjusted coagulation bath. The coagulation bath is composed of 80g / L sulfuric acid, 10.0g / L zinc sulfate, and 380g / L sodium sulfate. The concentration drop of the coagulation bath is 10.0g / L. The ...

Embodiment 2

[0057] Embodiment 2: A kind of preparation method of PVA / cellulose composite fiber

[0058] The specific preparation process of the PVA / cellulose composite fiber with a specification of 1.56dtex*38mm is as follows: figure 1 shown.

[0059] Include the following steps:

[0060] (1) Preparation steps of spinning dope

[0061] Dissolving polyvinyl alcohol with an average degree of polymerization of 1000 to prepare a polyvinyl alcohol (PVA) solution with a mass fraction of 18%; adding the prepared PVA solution to the viscose solution prepared by the viscose method to obtain a spinning stock solution; The weight ratio of PVA in the silk stock solution: cellulose A in the viscose collagen solution is 20:80.

[0062] (2) Spinning forming step

[0063] The spinning stock solution is spun by the adjusted coagulation bath, and the coagulation bath is composed of 75 g / L sulfuric acid, 7.6 g / L zinc sulfate, and 392 g / L sodium sulfate, and the drop of the coagulation bath concentration...

Embodiment 3

[0077] Embodiment 3: A kind of preparation method of PVA / cellulose composite fiber

[0078] The specific preparation process of the PVA / cellulose composite fiber with a specification of 1.67dtex*38mm is as follows: figure 1 shown.

[0079] Include the following steps:

[0080] (1) Preparation steps of spinning dope

[0081] Dissolving polyvinyl alcohol with an average degree of polymerization of 1700 to prepare a polyvinyl alcohol (PVA) solution with a mass fraction of 15%; adding the prepared PVA solution to the viscose solution prepared by the viscose method to obtain a spinning stock solution; The weight ratio of PVA in the silk stock solution: cellulose A in the viscose collagen solution is 25:75.

[0082] (2) Spinning forming step

[0083] The spinning stock solution is spun through the adjusted coagulation bath. The coagulation bath is composed of 68g / L sulfuric acid, 6.5g / L zinc sulfate, and 398g / L sodium sulfate. The concentration drop of the coagulation bath is 7....

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Abstract

The invention provides a preparation method of a PVA / cellulose composite fiber. The preparation method comprises the following steps: preparing a spinning solution, performing spinning moulding, carrying out damp and hot drawing, carrying out tow treatment, carrying out tow drying, carrying out dry and hot drawing, carrying out heat treatment type approval, and simply crosslinking. The preparation method provided by the invention has the advantages that PVA solution precrosslinking and further crosslinking bath are eliminated; the prepared PVA / cellulose composite fiber not only can enable advantages of two components to be complementary, but also can realize blending of the two components in structure, dry strength of the prepared PVA / cellulose composite fiber is more than or equal to 2.12cN / dtex, and wet strength is more than or equal to 1.08cN / dtex; and the prepared composite fiber has high water tolerance, good textile processing property and moisture absorption rate of 7.6-12.0%.

Description

technical field [0001] The invention relates to a preparation method of polyvinyl alcohol (PVA) / cellulose composite fiber, in particular to a method for preparing two-component (PVA+cellulose) fibers using cellulose pulp and polyvinyl alcohol (PVA) as raw materials. The invention discloses a method for preparing composite fibers, which belongs to the technical field of textiles. Background technique [0002] There are two or more polymer fibers that are not mixed on the same fiber section. This fiber is called a composite fiber, which is a physically modified fiber developed in the 1960s. Bicomponent fibers that combine the properties of both polymers can be obtained using composite fiber manufacturing techniques. [0003] Cellulosic fibers are mainly viscose fibers, which are widely used due to their good hygroscopicity, comfortable wearing, and excellent spinnability. They are mainly prepared by wet spinning. Vinylon is the trade name of polyvinyl acetal fiber, its perfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/10D01F8/02D06M10/00D06L4/13D01D5/06D01D5/12D02J1/22D02J13/00
CPCD01D5/06D01D5/12D01F8/02D01F8/10D02J1/224D02J13/00D06M10/003
Inventor 李昌垒马君志颜晶秦翠梅吴亚红王东刘乐
Owner 潍坊欣龙生物材料有限公司
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