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
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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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