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Preparation method of low-resistance and easy-to-shape non-woven fabrics for medical masks

A non-woven, low-resistance technology, applied in application, fiber type, non-woven fabric, etc., can solve problems such as single function, and achieve the effect of high filtration efficiency, high antibacterial property, and low resistance

Inactive Publication Date: 2020-08-14
苏州信义大时代网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country consumes a large amount of medical non-woven fabrics every year, but the current commercially available medical non-woven fabrics have relatively single functions, especially non-woven fabrics for medical masks. The performance requirements such as respiratory resistance are high, so there is a lack of a non-woven fabric for medical masks that integrates antibacterial properties, low resistance, and easy molding.

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber in parts by weight and mix thoroughly to obtain material I; Extrude and granulate with a screw extruder at a temperature of 280°C to obtain material II; vacuum dry the material II at 100°C for 32 hours so that the moisture content is less than 110ppm, and heat the dried material II through the screw extruder at 260 Melting and extruding into a melt at ℃, when the melt is extruded from the spinneret hole of the die, it is blown by a high-pressure hot air flow with a flow rate of 100m / sec and a temperature of 220°C on both sides of the spinneret hole, and the material II melts The body is stretched into ultra-fine fibers, condensed on the drum receiver with a distance of 10cm from the nozzle, and the drum speed of the receiver is 28r / min, which is self-bonded into a non-woven fabric; spraying antistatic on the o...

Embodiment 2

[0026] Weigh 50 parts of polylactic acid, 5 parts of succinylated chitosan / graphene oxide composite material, 20 parts of polyimide, and 25 parts of bamboo charcoal fiber by weight, and mix thoroughly to obtain material I; Take 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber for thorough mixing to obtain material I; extrude material I through a twin-screw extruder granulation, the extrusion temperature is 260°C, and the material II is obtained; the material II is vacuum-dried at 95°C for 24 hours, so that the moisture content is less than 110ppm, and the dried material II is heated by a screw extruder, melted and extruded at 290°C Pressed into a melt, when the melt is extruded from the spinneret hole of the die, it is blown by a high-pressure hot air flow with a flow rate of 150m / sec and a temperature of 220°C on both sides of the spinneret hole, and the material II mel...

Embodiment 3

[0029] Weigh 36 parts of polylactic acid, 5 parts of succinylated chitosan / graphene oxide composite material, 24 parts of polyimide, and 35 parts of bamboo charcoal fiber in parts by weight and mix thoroughly to obtain material I; Take 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber for thorough mixing to obtain material I; extrude material I through a twin-screw extruder granulation, the extrusion temperature is 300°C to obtain material II; the material II is vacuum dried at 90°C for 36 hours, so that the moisture content is less than 110ppm, and the dried material II is heated by a screw extruder, melted and extruded at 230°C Pressed into a melt, when the melt is extruded from the spinneret hole of the die, it is blown by a high-pressure hot air flow with a flow rate of 150m / sec and a temperature of 220°C on both sides of the spinneret hole, and the material II melt i...

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Abstract

The invention discloses a preparation method of low-resistance and easy-to-shape non-woven fabrics for medical masks. The preparation method comprises the following steps that S1, polylactic cid, succinylation chitosan / graphene oxide composite materials, polyimide, bamboo charcoal fibers are correspondingly weighed and taken for sufficient mixing to obtain a material I; S2, the material I is subjected to extrusion granulation to obtain a material II; S3, the material II is dried, then heating, melting, extruding, stretching, cooling and bonding are carried out through a screw extruder to formthe non-woven fabrics; S4, antistatic agent is sprayed, drying is carried out to obtain the low-resistance and easy-to-shape non-woven fabrics. According to the preparation method of the low-resistance and easy-to-shape non-woven fabrics for the medical masks, the polyimide, the polylactic acid, the succinylation chitosan / graphene oxide composite materials and the bamboo charcoal fibers are used for compound, the obtained non-woven fabrics have the characteristics of large specific surface area and good ductility, and the purpose of high antibacterial property, high filtration efficiency and low resistance can be achieved; and meanwhile, the mildewproof action can be achieved, and the preparation method can be used for preparing the medical masks.

Description

technical field [0001] The invention relates to the technical field of medical product preparation, in particular to a method for preparing a low-resistance, easy-to-form non-woven fabric for medical masks. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, are made of oriented or random fibers. It is called cloth because of its appearance and certain properties. Non-woven fabrics have the characteristics of moisture-proof, breathable, flexible, light weight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low in price, and recyclable. How to endow the widely used non-woven fabrics with excellent properties has become a hot topic at present. [0003] Chinese patent CN1970865A discloses a technology of adding silver-plated fibers into non-woven fibers, which has the ability to kill common bacteria. Chinese patent CN201109221Y discloses an antibacterial composite non-woven fabric, which is composed of three lay...

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): D04H1/541D06M13/256D01F8/14D01F8/16D01F8/18D01F1/10A41D13/11A41D31/30A41D31/26D06M101/32D06M101/30D06M101/40
CPCD04H1/541D06M13/256D01F8/14D01F8/16D01F8/18D01F1/103A41D13/1192A41D31/30A41D31/26D06M2101/32D06M2101/30D06M2101/40A41D2500/30A41D2500/50
Inventor 刘学森
Owner 苏州信义大时代网络科技有限公司
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