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Degradable online spunlace composite filter material and preparation method thereof

A composite filtration and spunlace technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of high filtration efficiency and high biodegradability at the same time, avoid charge escape, high mechanical filtration efficiency, reduce process The effect of the process

Pending Publication Date: 2022-08-09
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a degradable online spunlace composite filter material and its preparation method. The present invention solves the problem that the current mask filter material is difficult to balance high filtration efficiency and high biodegradability at the same time

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

[0026] Preparation of the inner layer material for carding: using long-staple cotton fiber as raw material for opening treatment, and then sending it to the carding machine, after carding and laying, a cotton fiber web is obtained. 35mm, material weight is 20g / m 2 , the thickness is 0.4mm.

[0027] Preparation of outer layer material for carding: take long-staple cotton fiber as raw material for opening treatment, and then send it to the carding machine. After carding and laying, a cotton fiber web is obtained. 35mm, material weight is 20g / m 2 , the thickness is 0.4mm.

[0028] Preparation of polylactic acid melt-blown intermediate layer material: place the polylactic acid slices in a vacuum oven to dry for 12 hours, and the drying temperature is 80 °C; add the modified additives and the dried polylactic acid slices to the two feeding hoppers of the granulator respectively , after melt extrusion, it is cooled in a water bath and then cut into granules. After drying, the mod...

Embodiment 2

[0033] Preparation of inner layer material for carding: using long-staple cotton fiber as raw material for opening treatment, and then sending it to the carding machine, after carding and laying, a cotton fiber web is obtained. The diameter of the long-staple cotton fiber used is 2.0 dtex and the length is 38mm, material weight is 30g / m 2 , the thickness is 0.6mm.

[0034] Preparation of the outer layer material for carding: the long-staple cotton fiber is used as the raw material for opening treatment, and then sent to the carding machine, and the cotton fiber web is obtained after carding and laying. 38mm, material weight is 30g / m 2 , the thickness is 0.6mm.

[0035]Preparation of polylactic acid melt-blown intermediate layer material: place the polylactic acid slices in a vacuum oven to dry for 12 hours, and the drying temperature is 80 °C; add the modified additives and the dried polylactic acid slices to the two feeding hoppers of the granulator respectively , after me...

Embodiment 3

[0040] Preparation of the inner layer material for carding: the long-staple cotton fiber is used as the raw material for opening treatment, and then sent to the carding machine, and the cotton fiber web is obtained after carding and laying. 40mm, material weight is 35g / m 2 , the thickness is 0.7mm.

[0041] Preparation of the outer layer material for carding: the long-staple cotton fiber is used as the raw material for opening treatment, and then sent to the carding machine. After carding and laying, the cotton fiber web is obtained. 35mm, material weight is 40g / m 2 , the thickness is 0.8mm.

[0042] Preparation of polylactic acid melt-blown intermediate layer material: place the polylactic acid slices in a vacuum oven to dry for 12 hours, and the drying temperature is 80 °C; add the modified additives and the dried polylactic acid slices to the two feeding hoppers of the granulator respectively , after melt extrusion, it is cooled in a water bath and then cut into granules...

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Abstract

The invention belongs to the field of preparation of air filtering materials, and discloses a degradable online spunlace composite filtering material and a preparation method thereof. The composite filter material is formed by overlapping and spunlacing a carding web-forming inner layer, a carding web-forming outer layer and a polylactic acid melt-blown middle layer, the carding web-forming outer layer contains a hydrophobic finishing functional auxiliary agent, and the polylactic acid melt-blown middle layer contains 1-3wt% of a modification auxiliary agent; the modification additive is a mixture of a hindered phenol antioxidant and a hindered amine light stabilizer. The preparation method comprises the following steps: opening long stapled cotton fibers serving as a raw material, then feeding the long stapled cotton fibers into a carding lapper, and carding and lapping to obtain a carding lapped outer layer material and a carding lapped inner layer material; preparing a polylactic acid melt-blown middle layer by taking the modified polylactic acid master batch and the conventional polylactic acid slices as raw materials; and carrying out spunlace reinforcement and electret to obtain the composite filter material. The composite filtering material can achieve the balance of high filtering efficiency and high biodegradability at the same time.

Description

technical field [0001] The invention belongs to the field of air filter material preparation, in particular to a degradable online spunlace composite filter material and a preparation method. Background technique [0002] In recent years, due to the outbreak and spread of the new crown epidemic, personal protective equipment such as masks has become a daily necessity, and a large number of discarded personal protective equipment needs to be recycled every day, which has brought great pressure to the natural environment. The preparation of degraded filter materials can largely solve this problem. [0003] Patent CN113208206A discloses a fully biodegradable mask and its preparation method. The fully biodegradable mask includes an inner layer, an outer layer, a barrier filter layer, a nose bridge strip and an elastic ear band, and the raw materials used are all degradable polyester or polylactic acid, etc., but the barrier filter layer material has not undergone electret finis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/56D04H1/492D04H1/42D04H1/4326
CPCD04H1/56D04H1/492D04H1/42D04H1/4326
Inventor 张海峰曾倩茹刘诺陈阳鸿葛明政张瑜李素英付译鋆李大伟
Owner NANTONG UNIVERSITY
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