Preparation method of high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric

A technology of liquid crystal polymer and spunbond non-woven fabrics, applied in the direction of melt spinning, non-woven fabrics, rayon manufacturing, etc., can solve the problem that ordinary spunbond non-woven fabrics cannot withstand high strength and high heat, and achieve excellent thermal stability. Properties and dimensional stability, low melt viscosity, low production costs

Active Publication Date: 2017-12-08
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a preparation method of high-strength heat-resistant liquid crystal polymer spunbonded nonwoven fabric, which solves the technical problem that ordinary spunbonded nonwoven fabric cannot withstand high strength and high heat resistance under special circumstances in the prior art

Method used

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  • Preparation method of high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric
  • Preparation method of high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric
  • Preparation method of high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric

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Embodiment 1

[0028] A preparation method of a high-strength heat-resistant liquid crystal polymer spunbonded non-woven fabric in this embodiment:

[0029] The liquid crystal polymer structure is The auxiliary agent is antioxidant 1010, and the auxiliary agent consumption is 0.05%.

[0030] 1. The preparation process of liquid crystal polymer is:

[0031] React the monomer 6-hydroxyl-2-naphthoic acid and p-hydroxybenzoic acid with excess acetic anhydride respectively, and obtain 6-acetoxy-2-naphthoic acid (ANA) and p-acetoxy Benzoic acid (ABA). ABA and ANA were added into the reactor at a molar ratio of 73:27, and sodium acetate was used as a catalyst in an amount of 0.1% of the total mass of the monomers. After exhausting the air in the reaction system with nitrogen, raise the temperature to 250°C and keep it for 2h, then raise the temperature to 280°C, keep it for 2h, then raise the temperature to 320°C, stop filling the nitrogen after 30min, apply a vacuum atmosphere to the system, t...

Embodiment 2

[0035] A preparation method of a high-strength heat-resistant liquid crystal polymer spunbonded non-woven fabric in this embodiment:

[0036] The liquid crystal polymer structure is The auxiliary agent is antioxidant 1010, and the consumption amount of the auxiliary agent is 0.01%.

[0037] 1. The preparation process of liquid crystal polymer is:

[0038] React the monomer p-hydroxybenzoic acid and biphenol with excess acetic anhydride respectively, and obtain 4-acetoxy-parabenzoic acid (ABA) and 4,4'-diacetoxy after washing, purification and drying. biphenyl (ABP). ABA, ABP and 2,6-naphthalene dicarboxylic acid are added into the reactor at a molar ratio of 50:25:25, and sodium acetate is used as a catalyst in an amount of 0.1% of the total mass of monomers. After removing the air in the reaction system with nitrogen, raise the temperature to 280°C and keep it for 3h, then raise the temperature to 300°C, keep it for 2h, then raise the temperature to 340°C, stop filling th...

Embodiment 3

[0042] A preparation method of a high-strength heat-resistant liquid crystal polymer spunbonded non-woven fabric in this embodiment:

[0043] The liquid crystal polymer structure is The auxiliary agent is antioxidant 1076, and the consumption amount of the auxiliary agent is 0.1%.

[0044]1. The preparation process of liquid crystal polymers is as follows: the monomer 6-hydroxy-2-naphthoic acid, 2,6-naphthalene dicarboxylic acid and hydroquinone are added to the reactor with a molar ratio of 60:20:20 and excess acetic anhydride Among them, methylimidazole is used as a catalyst, and the dosage is 0.3% of the total mass of monomers. After exhausting the air in the reaction system with nitrogen, raise the temperature to 130°C and keep it for 3h for acetylation reaction, then raise the temperature to 250°C, keep it for 3h, then raise the temperature to 300°C, continue the reaction for 2h, finally raise the temperature to 310°C, stop charging after 30min Nitrogen, apply a vacuum...

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Abstract

The invention discloses a preparation method of high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric. A liquid crystal polymer and an aid are sent into spunbond production equipment and subjected to melt extrusion, lateral blowing cooling, slit airflow drafting, lapping and hot rolling, and the spunbond nonwoven fabric is prepared. The liquid crystal spunbond nonwoven fabric with high strength and high heat resistance is prepared by means of the properties, including easiness in orientation, excellent mechanical performance, outstanding heat stability, chemical reagent resistance and the like, of the liquid crystal polymer, the problems that conventional spunbond nonwoven fabric has low strength and poor heat resistance are solved, and the high-strength and heat-resistant liquid crystal polymer spunbond nonwoven fabric can be widely used for the field with higher requirements for strength and heat resistance.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and relates to a preparation method of a spun-bonded non-woven fabric, in particular to a preparation method of a high-strength heat-resistant liquid crystal polymer spun-bonded non-woven fabric. Background technique [0002] Both spunbond and spunbond nonwovens are products prepared by polymer melt extrusion and direct web forming. The production method has the characteristics of high yield, no pollution and easy adjustment of product properties. Since the spunbonded nonwoven fabric is laid by mechanical drafting during the production process, its mechanical strength is higher than that of the spunbonded nonwoven fabric drawn by high-speed airflow. It can be used in medical and health materials, clothing lining, portable Preparation of bags etc. At present, commercialized spunbond nonwoven fabrics are mainly prepared from polypropylene (PP) and polyester (PET) resins, among which PET...

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): D04H3/009D04H3/011D01D5/08D01D5/084D01D5/088D01D10/02D01F1/10D01F6/90
CPCD01D5/08D01D5/084D01D5/088D01D10/02D01F1/10D01F6/905D04H3/009D04H3/011
Inventor 魏朋张一风章伟郭正喻红芹
Owner ZHONGYUAN ENGINEERING COLLEGE
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