Potential shrinkage composite fibers for protective clothing, micro-bulge high-density hydrophobic knitted fabric and preparation method of micro-bulge high-density hydrophobic knitted fabric

A composite fiber and knitted fabric technology, applied in knitting, protective clothing, fiber types, etc., can solve the problems of land occupation, single disinfection form, and high hardness of protective clothing

Active Publication Date: 2021-06-04
DALIAN POLYTECHNIC UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the protective clothing made of these materials are disposable protective clothing, and the following problems are common: (1) the use of disposable protective clothing (average 350-600 grams/set) causes huge waste of resources, and the used protective clothing is incinerated Treatment will cause environmental pollution, landfill will occupy land, and viruses and bacteria hidden in protective clothing may cause secondary transmission and cause public safety incidents again; (2) Based on cost considerations,

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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  • Potential shrinkage composite fibers for protective clothing, micro-bulge high-density hydrophobic knitted fabric and preparation method of micro-bulge high-density hydrophobic knitted fabric
  • Potential shrinkage composite fibers for protective clothing, micro-bulge high-density hydrophobic knitted fabric and preparation method of micro-bulge high-density hydrophobic knitted fabric
  • Potential shrinkage composite fibers for protective clothing, micro-bulge high-density hydrophobic knitted fabric and preparation method of micro-bulge high-density hydrophobic knitted fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The copolymer of caprolactam and hexamethylenediamine adipate with a relative viscosity of 3.19-3.41 (hereinafter referred to as PA66 / 6, BASF C33) is vacuum-dried at 60-100°C for 4-6 hours, so that the mass fraction of water content is Below 0.01%; the copolymer of ethylene terephthalate and ethylene glycol isophthalate-5-sodium sulfonate, isophthalic acid and polyethylene glycol (hereinafter referred to as copolymerized PET) at 120~ Airflow drying at 165°C for 4 to 6 hours to keep the water content below 0.005%; polyethylene terephthalate (hereinafter referred to as PET) at 120 to 180°C for 4 to 6 hours to make it Its water content is below 0.005%; polyamide 6 (hereinafter referred to as PA6) and polyamide 66 (hereinafter referred to as PA66) are dried at 90-120°C under the protection of nitrogen for 3-6 hours, so that the water content is 0.01%. the following.

Embodiment 2

[0035] The dried PET and PA66 / 6 are respectively plasticized and melted, fed into the 8+1 type spinning assembly, cooled and formed after extrusion (such as figure 2 Shown), after drawing, it is 30% that PA66 / 6 mass fraction is obtained, and the latent shrinkage composite fiber that PET mass fraction is 70%. The composite fiber is woven into a surface density of 270 g / m with a 42-pin / inch knitting machine 2 For the knitted fabric, the fabric was treated at 120° C., 2% sodium hydroxide and dodecyldimethylbenzyl ammonium chloride aqueous solution for 40 minutes, and after drying, it was polished with 400# sandpaper to obtain a micro-raised high-density fabric. Dip-coat the high-density fabric with isopropanol solution with a concentration of 10% PDMS, then spray it with 1.0% curing agent, and then press and roll it. Dry it with infrared rays at 70°C for 10 minutes, set it with infrared rays at 120°C for 3 minutes, and cool it. After winding, a micro-raised high-density hydroph...

Embodiment 3

[0037]The dried PA66 and PA66 / 6 are respectively plasticized and melted, fed into a 4+1 type spinning assembly, cooled and formed after extrusion, and obtained after drawing with a mass fraction of PA66 / 6 of 40% and a mass fraction of PA66 of 60%. Potential to shrink composite fibers. It is 200 grams / m2 that it is woven into a surface density of 42 needles / inch knitting machine with a needle density 2 For knitted fabrics, the fabrics were treated at 100° C. in 0.2% formic acid aqueous solution for 90 minutes, and after drying, they were polished with 200# sandpaper to obtain micro-raised high-density fabrics. The high-density fabric is dip-coated with isopropanol solution with a concentration of 5% PDMS, then sprayed with 0.5% curing agent, and then rolled, dried at 120°C for 3 minutes, and set at 80°C for 5 minutes, cooled After winding, the micro-raised high-density hydrophobic knitted fabric is obtained, the fabric contact angle is equal to 131.5°, and the water staining l...

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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Abstract

The invention relates to potential shrinkage composite fibers for protective clothing, a micro-bulge high-density hydrophobic knitted fabric and a preparation method of the micro-bulge high-density hydrophobic knitted fabric. According to the invention, the shrinkage composite fibers and the fabric are prepared from a ring-loop structure formed by shrinkage difference of components forming fibers and a micro-bulge structure formed by split fibers generated by post-treatment and sanding; and the composite fibers are small in diameter, large in specific surface area, better in fabric softness and comfort and better in barrier protection effect. Micro-bulges are woven in the fabric, the micro-bulges are good in fastness, and the number of the micro-bulges is increased along with increase of friction times in the using process, so that the hydrophobic effect is better. The surface density of the fabric can be regulated and controlled through the fabric structure, the knitting density and the post-treatment process, so that different protection requirements are met. The fabric can be repeatedly used, the surface density range of the fabric is wide and can reach 120-270 g/m<2>, the contact angle is larger than 130 degrees, the wetting degree is larger than or equal to 4-5, and the fabric has broad-spectrum disinfection adaptability to high temperature, high pressure, ultraviolet rays, ethylene oxide and the like.

Description

technical field [0001] The invention belongs to the technical field of functional fabrics, and in particular relates to a method for preparing latent shrinkable composite fibers and micro-raised high-density hydrophobic knitted fabrics for protective clothing. Background technique [0002] Medical protective clothing is a very important personal protective equipment for medical staff in fighting infectious disease outbreaks, especially in dealing with emerging infectious diseases with unknown transmission routes and infectious diseases with high transmission risks. my country promulgated the "Technical Requirements for Medical Disposable Protective Clothing" in 2003, and made specific requirements for the performance of medical protective clothing, including good barrier properties (especially to be able to block liquids, such as secretions) , splatter, blood), water permeability, blood oozing, breaking strength, corrosion resistance, wear resistance and insulation, etc., and...

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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IPC IPC(8): D01F8/12D01F8/14D06M13/188D06M11/38D06M15/643D04B1/16D04B21/00A41D1/04A41D31/04D06M101/32D06M101/34
CPCD01F8/12D01F8/14D06M13/188D06M11/38D06M15/643D04B1/16D04B21/00A41D1/04A41D31/04D06M2101/32D06M2101/34D06M2200/12
Inventor 郭静杨强吕丽华梅艳芳周峰管福成殷聚辉
Owner DALIAN POLYTECHNIC UNIVERSITY
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