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PVA fiber and its non-woven fabric preparing method

A fiber and application technology, applied in the field of chemical fibers and their manufacturing methods and products, to achieve the effects of cost reduction, good economic benefits, and easy promotion

Inactive Publication Date: 2008-11-26
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method for preparing PVA fibers with a solution method with a solid content greater than 20%, and the patent literature on direct processing of the obtained PVA fibers into non-woven fabrics have not yet been reported.

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

[0041] Two-step method for preparing PVA non-woven fabrics: first, wet spinning is performed to prepare PVA fibers, and then processed into non-woven fabrics.

[0042] Wet spinning: 50g of 8% PVA, 230g of water, Al with particle diameter of 1-40μm 2 o 3 350g, PVA / Al 2 o 3 The mass ratio is 7:1. PVA wet spinning process: Dissolve 50g of 8%PVA in 230g water at 80°C, add the Al in batches 2 o 3 350g, heated up to 95°C while stirring to obtain a spinning dope. Wet spinning is carried out with the obtained spinning stock solution, the diameter of the spinneret hole is 0.8mm, the spinning temperature is 90°C, the coagulation bath is a saturated aqueous solution of Glauber's salt, and the draw ratio is 7 times;

[0043] Non-woven fabric forming process: use the obtained PVA fiber to make non-woven fabric by hot pressing, the hot pressing temperature is 80°C, and the pressure is 40N·mm -1 ;

[0044] Acetalization treatment: After immersing the PVA non-woven fabric in the hyd...

Embodiment 2

[0046]Two-step method for preparing PVA non-woven fabrics: first, wet spinning is performed to prepare PVA fibers, and then processed into non-woven fabrics.

[0047] Wet spinning process: Dissolve 50 g of 9.5% PVA in 180 g of water at 80° C., add 300 g of ceramic powder (particle size 0.5-30 μm) and 3 mL of polyethylene glycol in batches, and heat up to 98° C. while stirring. The spinning stock solution obtained above was subjected to wet spinning forming, the spinneret hole diameter was 0.5mm, the spinning temperature was 95°C, the coagulation bath was a saturated Glauber's salt aqueous solution, and the drafting ratio of the fiber was 9 times.

[0048] Non-woven fabric forming process: use the obtained PVA fiber to make non-woven fabric by hot pressing, the hot pressing temperature is 110°C, and the pressure is 30N·mm -1 .

[0049] Acetalization treatment: After immersing the PVA non-woven fabric in the hydroformylation bath for acetalization treatment, the PVA non-woven f...

Embodiment 3

[0051] Two-step method to prepare PVA non-woven fabrics: first dry spinning to prepare PVA fibers, and then process them into non-woven fabrics.

[0052] Dry spinning process: Dissolve 50g of 6% PVA in 230g of water at 80°C, add ceramics 500g (particle size 0.5-30μm) in batches, Tween 7mL, gum arabic 6g, and heat up to 95°C while stirring. The spinning dope obtained above was subjected to dry spinning. The spinneret hole diameter is 0.8mm, the spinning temperature is 80°C, the hot air temperature is 130°C, the air is blown in a circular manner, and the drafting ratio of the hot air to the fiber is 3 times.

[0053] Non-woven fabric forming process: hot pressing temperature 60°C, pressure 60N·mm -1 .

[0054] Acetalization treatment: After immersing the PVA non-woven fabric in the hydroformylation bath for acetalization treatment, the PVA non-woven fabric product is obtained. The composition of the hydroformylation bath is: 220g / L sulfuric acid, 60g / L sodium sulfate, 35g / L f...

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Abstract

A method for making PVA fiber and non-woven fabrics, whose formula (by weight) is PVA 5-15 %, 20-85 % of inorganic metal oxide micropowder. 0-5 % of dispersant, 0-5 % of anti precipitant and the others are water. Said PVA has 1700-2000 of degree of polymerization, said inorganic metal oxide micropowder is any one kind of ZnO, Al2O3, TiO2, SiO2 or ceramic powder with 0.5-60 micrometer of grain size, said dispersant is one kind of polyethylene, Tween or polyacrylic acid, said anti precipitant is one kind of cane sugar, glucose, Arabic gum, polyacrylamide, soluble starch or beeswax. Said method can adopts improved traditional two-stage method or new one-stage method, the prepared non-woven fabrics has both of original and new performance.

Description

technical field [0001] The invention relates to a chemical fiber and its manufacturing method and product technology, specifically a PVA fiber containing inorganic powder, its manufacturing method and the technology used to make non-woven fabrics. The main international patent classification number is intended to be Int.CL 7 D01F 6 / 14. Background technique [0002] Polyvinyl alcohol (PVA) is a widely used chemical fiber. Because of the hydroxyl group in its molecular structure, PVA fiber and its non-woven products have excellent hygroscopic properties, so it is widely used in medical, sanitary and civil fields. . PVA fiber is generally obtained by solution spinning process, that is, PVA is dissolved in a certain solvent, and it is spun by wet or dry process, and then after drawing, heat setting and other processes, PVA fiber with certain strength can be obtained. . Within the search scope of the inventor, the PVA fibers currently obtained by the solution spinning process...

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 Patents(China)
IPC IPC(8): D01F6/14D04H1/40D04H3/007
Inventor 李树锋
Owner TIANJIN POLYTECHNIC UNIV
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