Coarse-denier high-strength spun-bonded non-woven fabrics and preparation method thereof

A spun-bonded non-woven fabric with high strength technology, which is applied in the direction of melt spinning, non-woven fabrics, textiles and papermaking, and can solve the problem of low breaking strength of spun-bonded non-woven fabrics

Inactive Publication Date: 2015-02-18
HUNAN NONWOVEN CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, spunbonded non-woven fabrics are generally prepared according to the following method. PET slices are sequentially screened, dried, melt-extruded, filtered, spun, cooled and drawn, spun-laid, reinforced, and rolled. The breaking strength of the spunbonded nonwoven fabric prepared by the technology is low

Method used

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  • Coarse-denier high-strength spun-bonded non-woven fabrics and preparation method thereof
  • Coarse-denier high-strength spun-bonded non-woven fabrics and preparation method thereof
  • Coarse-denier high-strength spun-bonded non-woven fabrics and preparation method thereof

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Experimental program
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preparation example Construction

[0020] The invention provides a method for preparing a coarse denier high-strength spunbonded nonwoven fabric, comprising the following steps:

[0021] a) Crystallize and dry PET with an intrinsic viscosity of 0.8 to 1 to obtain PET slices;

[0022] b) Melting and extruding, filtering, spinning, cooling and drawing the PET chips in order to obtain PET fibers; when spinning, the capillary pores of the spinneret are 0.6 mm to 0.9 mm;

[0023] c) laying the PET fibers into a web, and performing reinforcement treatment to obtain a coarse denier high-strength spunbonded nonwoven fabric.

[0024] The invention uses PET with an intrinsic viscosity of 0.8-1 as a raw material, which makes it possible to spin through a large-diameter spinneret, thereby obtaining a coarse denier and high-strength spun-bonded non-woven fabric with high breaking strength. In the present invention, the intrinsic viscosity of the PET is more preferably 0.9.

[0025] In the present invention, firstly, PET w...

Embodiment 1

[0035] After the PET chips with an intrinsic viscosity of 0.8 are screened by a vibrating sieve, they enter a fluidized bed for crystallization at 140°C, and then enter a packed drying tower for drying at a drying temperature of 170°C. After drying, the moisture content of the PET chips is less than 30ppm;

[0036] Melt and mix the dried PEI slices in the extruder, and control the temperature in zone 1-7 of the extruder at 275±2°C, 285±2°C, 290±2°C, 295±2°C, 315±2°C, 310±2°C, 310±2°C to obtain a melt;

[0037] The melt is filtered in a filter with a temperature of 310±2°C, and the pre-filter pressure is 65MPa; then it enters a spinning box at 320±5°C for spinning, with a spinning pressure of 65MPa and a pore size of 0.8 The spinneret holes of mm form as-spun filaments, and then enter the drafter to draw at a speed of 5600m / min after cooling under the cooling air of 20±1°C to form PET fibers;

[0038] The PET fiber is passed through a spinning device and a web forming machine ...

Embodiment 2

[0043] PET slices with an intrinsic viscosity of 1.0 are screened by a vibrating sieve, then enter a fluidized bed for crystallization at 145°C, and then enter a packed drying tower for drying at a drying temperature of 175°C. After drying, the moisture content of the PET slices is less than 30ppm;

[0044] Melt and mix the dried PEI slices in the extruder, and control the temperature in zone 1-7 of the extruder at 275±2°C, 285±2°C, 290±2°C, 295±2°C, 315±2°C, 310±2°C, 310±2°C to obtain a melt;

[0045] The melt is filtered in a filter with a temperature of 310±2°C, and the pre-filter pressure is 65MPa; then it enters a spinning box at 320±5°C for spinning, with a spinning pressure of 65MPa and a pore size of 0.8 The spinneret holes of mm form as-spun filaments, and then enter the drafter to draw at a speed of 5600m / min after cooling under the cooling air of 20±1°C to form PET fibers;

[0046] The PET fiber is passed through a spinning device and a web forming machine to form ...

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Abstract

The invention provides a preparation method of coarse-denier high-strength spun-bonded non-woven fabrics. The method comprises the following steps: (a), crystallizing PET with an intrinsic viscosity of 0.8-1, and drying to obtain PET chips; (b), sequentially melting the PET chips, extruding, filtering, spinning, cooling and drawing to obtain PET fibers, wherein the diameter of pores of a yarn spraying plate during the spinning is 0.6mm-0.9mm; and (c), arranging and lapping the PET fibers, reinforcing the PET fibers after the arranging and the lapping to obtain the coarse-denier high-strength spun-bonded non-woven fabrics. According to the preparation method of the coarse-denier high-strength spun-bonded non-woven fabrics, the PET with the intrinsic viscosity of 0.8-1 is used as a raw material, the yarn spraying plate with the large pore diameter of 0.6mm-0.9mm during the spinning can be used for preparing the relatively coarse fibers; finally, the coarse-denier high-strength spun-bonded non-woven fabrics are relatively high in fiber fineness and relatively high in breaking strength.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabrics, and in particular relates to a coarse-denier high-strength spun-bonded non-woven fabric and a preparation method thereof. Background technique [0002] Spun-bonded non-woven fabrics are extruded and stretched polymers to form continuous filaments, then the filaments are laid into a web, and the web is then bonded by itself, thermally bonded, chemically bonded or mechanically reinforced to make it The web becomes a nonwoven. Spunbonded non-woven fabric has the advantages of high strength, good high temperature resistance, aging resistance, UV resistance, high elongation, good stability and air permeability, corrosion resistance, sound insulation, moth resistance, etc. It can be used to make tufted carpets, filter materials, composite support materials, packaging materials, geotechnical construction materials, and more. [0003] At present, spunbonded non-woven fabrics are generally pre...

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): D04H3/14D04H3/105D04H3/011D01D5/08
CPCD04H3/14D01D5/08D04H3/011D04H3/105
Inventor 彭友勇杨建辉欧阳清田晓斌毛向荣李智慧张国相熊建生
Owner HUNAN NONWOVEN CNNC
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