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A kind of preparation method of flame-retardant nonwoven fabric

A technology of non-woven fabrics and liquid crystal polymers, applied in the direction of non-woven fabrics, textiles and papermaking, feeding solutions to spinnerets, etc., can solve the problems of poor flame retardant effect, high cost, complicated process, etc. Effects of viscosity, improved filtration, and excellent flame retardancy

Active Publication Date: 2021-03-16
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a preparation method of a flame-retardant non-woven fabric in order to solve technical problems such as complex process, high cost, and poor flame-retardant effect existing in the current flame-retardant non-woven fabric production process

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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  • A kind of preparation method of flame-retardant nonwoven fabric
  • A kind of preparation method of flame-retardant nonwoven fabric
  • A kind of preparation method of flame-retardant nonwoven fabric

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preparation example Construction

[0021] A preparation method of flame-retardant nonwoven fabric, the steps are as follows:

[0022] (1) Blend the slices of liquid crystal polymer and polymer evenly according to the ratio of 1: (1-19), and after vacuum drying for 8-24 hours, carry out melt extrusion granulation in the granulator to prepare composite polymer slice;

[0023] (2) Send the composite polymer chips prepared in step (1) into a twin-screw extruder, and use meltblown technology or spunbond method to complete the preparation of flame-retardant nonwoven fabrics.

[0024] In the step (1), the liquid crystal polymer is a phosphorus-containing liquid crystal polymer, and the phosphorus-containing liquid crystal polymer has the following structural units:

[0025]

[0026] Among them, R 1 The structure is

[0027] R 2 Any of the following structures: Wherein n is an integer of 4-10;

[0028] R 3 Any of the following structures:

[0029] The melting point of the phosphorus-containing liquid ...

Embodiment 1

[0037] Phosphorus-containing liquid crystal polymer A and PA-66 are uniformly blended at a mass ratio of 3:17, dried at 110°C and vacuum degree of 20Pa for 12 hours, and then melted and extruded in a granulator for granulation to obtain a phosphorus-containing composite polymer The material is sliced, and the melting temperature is 270°C. After vacuum drying, the chips are sent to a twin-screw extruder with an aspect ratio of 45. After preheating, melting, filtering and metering, they are sent to the spinneret die to extrude a thin stream of melt through the spinneret. . The temperatures of the feed section, compression section and metering section of the screw are 180°C, 280°C, and 310°C respectively, and the screw speed is 25 rpm. The melt-blown technology is used, that is, after the fine flow of the melt is stretched and refined by hot air, it is condensed into a web on the receiving device, and the fiber web is trimmed and wound to obtain a flame-retardant melt-blown PA-6...

Embodiment 2

[0040] Phosphorus-containing liquid crystal polymer B and PET are uniformly blended at a mass ratio of 1:4, dried at 110°C and vacuum degree of 50Pa for 18 hours, and then melted and extruded in a granulator for granulation to obtain phosphorus-containing composite polymer chips , and the melt extrusion temperature was 280°C. After vacuum drying, the chips are sent to a twin-screw extruder with an aspect ratio of 40. After preheating, melting, filtering and metering, they are sent to the spinneret die to extrude a thin stream of melt through the spinneret. . The temperatures of the feed section, compression section and metering section of the screw are 170°C, 280°C, and 300°C, respectively, and the screw speed is 25 rpm. The melt-blown technology is used, that is, after the fine flow of the melt is stretched and refined by hot air, it is condensed into a web on the receiving device, and the fiber web is trimmed and wound to obtain a flame-retardant melt-blown PET nonwoven fab...

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Abstract

The invention belongs to the technical field of weaving, and relates to a manufacturing method for an anti-flaming non-woven fabric. The method comprises: uniformly mixing phosphorus-containing liquid crystalline polymer and polymer slices according to proportion of 1:(1-19), drying in vacuum for 8-24 h, performing melt extrusion pelletizing in a pelletizer, to manufacture composite polymer slices; sending the manufactured composite polymer slices into a double-screw extruder, using a melt-blow technology or a spun-bond process to complete manufacturing of the anti-flaming non-woven fabric. The manufactured non-woven fabric has relatively good flame retardant property and mechanical property. In addition, since viscosity is relatively low when the phosphorus-containing liquid crystalline polymers melt, and the phosphorus-containing liquid crystalline polymers can highly oriented under external force action, when the phosphorus-containing liquid crystalline polymers and a conventional polymer are extruded together, melt viscosity of the polymer can be substantially reduced, to obtain a non-woven fabric whose fiber diameter is relatively small, so as to further improve filtering and ventilating performance of the fabric.

Description

technical field [0001] The invention belongs to the technical field of textiles, and relates to a preparation method of a flame-retardant nonwoven fabric. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, are formed by directly using polymer chips, short fibers or filaments to form fibers through airflow or machinery, and then undergo spunlace, needle punching, or hot-rolled reinforcement, and finally finish finishing. The non-woven fabric is a new type of fiber product with soft, breathable and planar structure, which is widely used in medical and health, industry, agriculture, household and other fields. [0003] Ordinary non-woven materials do not have flame retardant properties, and are extremely flammable when exposed to open flames. With the improvement of people's safety awareness and the sound implementation of relevant national laws and regulations, non-woven fabrics used in automotive interiors, home decoration, electronic appliance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/005D04H3/009D04H3/007D04H3/033D01D1/09
CPCD01D1/09D04H3/005D04H3/007D04H3/009D04H3/033D10B2321/022D10B2331/02D10B2331/06D10B2401/04
Inventor 魏朋张一风章伟郭正高艳菲
Owner ZHONGYUAN ENGINEERING COLLEGE