Sea-island fiber composite melt-spinning method using water-soluble modified pva as sea

A sea-island fiber and melt-spinning technology, which is applied in the direction of melt-spinning, fiber treatment, and fiber chemical characteristics, can solve problems such as composite fiber pollution, achieve the effects of increasing thermal decomposition temperature, reducing labor intensity, and inhibiting crystallization

Active Publication Date: 2021-07-06
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method to solve the pollution problem caused by the preparation of composite fibers by organic solvent treatment of traditional PVA slices, to achieve the purpose of composite melt spinning with island phase resin, and to enhance Continuity of production, reduced labor intensity, sea-island fiber composite melt spinning method using water-soluble modified PVA as the sea

Method used

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  • Sea-island fiber composite melt-spinning method using water-soluble modified pva as sea
  • Sea-island fiber composite melt-spinning method using water-soluble modified pva as sea
  • Sea-island fiber composite melt-spinning method using water-soluble modified pva as sea

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Embodiment 1

[0035]In this example, a sea-island fiber composite melt spinning method using water-soluble modified PVA as the sea, the primary fiber formed by PP as the island phase component and PVA as the sea phase component, fiber stretching and heat setting to obtain Sea-island fiber, the island phase component of the primary fiber accounts for 60% of the cross-sectional area of ​​the fiber, and the sea component accounts for 40% of the cross-sectional area of ​​the fiber. The elongation rate is 7-10%, and the single fiber fineness of the island component is below 0.6dtex. The water-soluble PVA sea phase is made of PVA masterbatch, which is made of the following raw materials in the weight ratio: 50 parts of polyvinyl alcohol ; 15 parts of polyol or salt compound modifier; 3 parts of antioxidant; 3 parts of lubricant; 25 parts of deionized water; wherein, polyol or salt compound modifier is alcohol amine, polyethylene glycol , the antioxidant is aniline antioxidant, and the lubricant i...

Embodiment 2

[0063] The same part of this embodiment and embodiment 1 will not be repeated, and its difference is:

[0064] In this embodiment, the sea-island fiber composite melt spinning method uses water-soluble modified PVA as the sea. The primary fiber formed by PP as the island phase component and PVA as the sea phase component is stretched and heat-set to obtain the sea-island fiber. , the island phase component of the primary fiber accounts for 70% of the cross-sectional area of ​​the fiber, and the sea component accounts for 30% of the cross-sectional area of ​​the fiber. 7-10%, the single fiber fineness of the island component is below 0.8dtex, the PVA sea phase is made of PVA masterbatch, which is made of the following raw materials in the following weight ratio: 60 parts of polyvinyl alcohol; 20 parts of polyol or salt compound modifier; 5 parts of antioxidant; 5 parts of lubricant; 30 parts of deionized water. Among them, the modifier of polyols or salt compounds is acetate o...

Embodiment 3

[0082] The same part of this embodiment and embodiment 1, 2 will not be repeated, and its difference is:

[0083] In this embodiment, the sea-island fiber composite melt spinning method uses water-soluble modified PVA as the sea. The primary fiber formed by PP as the island phase component and PVA as the sea phase component is stretched and heat-set to obtain the sea-island fiber. , the island phase component of the primary fiber accounts for 85% of the cross-sectional area of ​​the fiber, and the sea component accounts for 15% of the cross-sectional area of ​​the fiber. 7 to 10%, the single fiber fineness of the island component is below 0.8dtex, and the PVA sea phase is made of PVA masterbatch, which is fused with the following raw materials in parts by weight: polyvinyl alcohol 50 to 70 25 parts of polyols or salt compound modifiers; 7 parts of antioxidants; 7 parts of lubricants; 35 parts of deionized water;

[0084] Among them, the modifier of polyols or salt compounds i...

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Abstract

The invention discloses a sea-island fiber composite melt spinning method using water-soluble modified PVA as the sea, using thermoplastic resin raw materials as the island phase component, and modified PVA as the sea phase component, comprising the following steps: (1) ), the preparation of modified PVA masterbatch (two), the preparation of sea-island fibers, the two raw material melts after extrusion melting are sent to the melt pipeline for heating; the heating temperature of the two is set so that when the two raw materials melt After the bodies are contacted by the distribution pipes of the composite components in the spinning box to ensure the formation of islands and seas, the water-soluble PVA does not thermally decompose as a standard; the prepared sea-island type primary fibers are immersed in hot water to dissolve the sea-island fibers. Phase component PVA, compared with traditional PVA, the present invention not only ensures that the PVA sea component can be melted and compounded with PET with high melting point for spinning, but also does not decompose PVA when reaching the melting point. It solves the problem that the traditional PVA cannot be melted and compounded due to the decomposition of PET at high temperature.

Description

technical field [0001] The present invention relates to the technical field of superfine fibers, in particular to a sea-island fiber composite melt spinning method using water-soluble modified PVA as the sea. Background technique [0002] Microfiber has attracted people's attention for its high coverage, soft touch, comfortable wearing, soft luster, and good adsorption properties. It is widely used in clothing, artificial leather, building materials, adsorption and filter materials and other fields. Sea-island fiber is the abbreviation of sea-island composite fiber. It adopts composite spinning technology to use two fiber-forming polymers as "island" and "sea" components, and melt-spins them according to different ratios, and then uses these two The different solubility of the components to a certain chemical solvent, the "sea" component is dissolved and the "island" component is left, that is, the composite ultrafine fiber. According to the type of marine polymer and post-...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): D01D5/08D01D5/30D01F8/04D01F1/10
CPCD01D5/08D01D5/30D01F1/10D01F8/04
Inventor陈韶娟李汶玥王玉浩李广鲁刘尚鹏
OwnerQINGDAO UNIV