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Preparation method of polyvinyl alcohol based water-soluble nonwoven fabric

A technology of polyvinyl alcohol and non-woven fabrics, which is applied in the field of textile and chemical fibers. It can solve the problems of difficult development of direct cloth-forming technology, enhanced intermolecular interaction, and high melting point. It has broad market application prospects, high application value, and increased specific surface area. Effect

Active Publication Date: 2016-10-12
大连天马可溶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the molecular structure of polyhydric polyvinyl alcohol, the intermolecular interaction is enhanced, and the melting point is too high, so it cannot be formed by melt spinning, and the development of direct fabric technology encounters difficulties

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
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 1 part of allyl polyethylene glycol (APEG) with a molecular weight of 1200 to a mixed solution of water and methanol with a mass ratio of 80:20, raise the temperature to 65°C, stir evenly and APEG dissolves into a homogeneous solution, then add Catalyst ammonium persulfate, at the same time, 20 parts of vinyl acetate (VAc) was added to the solution at a rate of 1 part / min, and reacted at 65°C for 3 hours to obtain polyvinyl acetate as the main chain and polyethylene glycol as the branched chain. Graft copolymer (PVAc-g-PEG). Carry out alcoholysis of PVAc-g-PEG with methanol, convert vinyl acetate group into hydroxyl group, obtain polyvinyl alcohol as the main chain, and polyethylene glycol as the branched graft copolymer PVA-g-PEG. Add 25 parts of PVA-g-PEG to 50 parts of methanol to make a solution, and start adding 25 parts of sodium hydroxide methanol solution (including 24 parts of methanol and 1.0 part of sodium hydroxide) dropwise to the solution to react for ...

Embodiment 2

[0028] Add 1 part of APEG with a molecular weight of 2400 to a mixed solution of water and methanol with a mass ratio of 80:20, raise the temperature to 70°C, stir evenly and APEG dissolves into a homogeneous solution, add a catalyst, and simultaneously add 30 parts of VAc with 1 Parts / min was added into the solution, and reacted at 70°C for 4.5 hours to obtain PVAc-g-PEG. Add 30 parts of PVA-g-PEG to 45 parts of methanol to make a solution, and start adding 25 parts of sodium hydroxide methanol solution (including 23 parts of methanol and 2.0 parts of sodium hydroxide) dropwise to the solution after the temperature is raised to 50 °C for 50 minutes. , after the reaction is finished, carry out suction filtration, washing and drying to obtain polyvinyl alcohol grafted polyethylene glycol copolymer II (PVA-g-PEG II).

Embodiment 3

[0030] Add 1 part of APEG with a molecular weight of 4000 to a mixed solution of water and methanol with a mass ratio of 80:20, raise the temperature to 80°C, stir evenly and APEG dissolves into a homogeneous solution, then add a catalyst, and at the same time, add 25 parts of VAc with 1 Parts / min was added to the solution, and reacted at 80°C for 6 hours to obtain PVAc-g-PEG. Add 25 parts of PVA-g-PEG to 50 parts of methanol to make a solution, and start adding 25 parts of sodium hydroxide methanol solution (including 24 parts of methanol and 1.0 part of sodium hydroxide) dropwise to the solution after the temperature rises to 45°C to react for 45 minutes , after the reaction is finished, carry out suction filtration, washing and drying to obtain polyvinyl alcohol grafted polyethylene glycol copolymer III (PVA-g-PEG III).

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Abstract

The invention relates to a preparation method of a polyvinyl alcohol based water-soluble nonwoven fabric, belonging to the technical field of textiles and chemical fibers. The polyvinyl alcohol based water-soluble nonwoven fabric is prepared by utilizing water and polyoxyethylene to synergistically plastify polyvinyl alcohol and carrying out melt spinning, online drafting and direct web forming. The preparation method is simple and pollution-free, is low in cost and has a wide range of application and high application value. The nonwoven fabric has a broad market application prospect in the fields of costume embroidery, disposable medical health care products, and the like.

Description

technical field [0001] The invention relates to a method for preparing a polyvinyl alcohol-based water-soluble nonwoven fabric, belonging to the technical field of textile chemical fibers. Background technique [0002] Polyvinyl alcohol-based water-soluble non-woven fabric is a kind of green and environmental protection material. It has abundant sources of raw materials and excellent product performance. Therefore, it has a wide range of market applications in home textiles, clothing, medical and health fields. [0003] The traditional polyvinyl alcohol-based water-soluble nonwovens are made of water-soluble short fibers, which are prepared by processes such as wool picking, carding, web forming, and hot rolling. It has the problems of long technological process, high cost and low product strength. With the popularity of direct cloth-forming technologies such as polyester and polypropylene, polyvinyl alcohol has also become a research hotspot. However, due to the molecular...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4326D01F8/10
CPCD01F8/10D04H1/4326
Inventor 郭静刘闻徐德增刘建为
Owner 大连天马可溶制品有限公司
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