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Fiber for medical fabrics and preparation method of fiber

A fabric and fiber technology, applied in the field of medical fabric fiber and its preparation, can solve the problems of low processing efficiency, limit PET recycling, time-consuming and labor-intensive, etc., and achieve the effect of improving the degradation rate

Active Publication Date: 2019-05-03
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the proportion of polyester recycling in my country has increased significantly in recent years, its growth is mainly due to the substantial increase in the recycling rate of polyester bottles, and the recycling rate of clothing using more PET fibers is still very low (less than 10%) ), this is because most of the clothing is made of cotton-polyester or wool-polyester blends. On the one hand, it requires a large labor cost to separate the polyester fibers. On the other hand, PET has a dense structure and high crystallinity, and its natural degradation time is long and time-consuming. laborious
At present, the mainstream PET degradation methods include hydrolysis, alcoholysis, ammonolysis, aminolysis and pyrolysis, etc., but due to the special structure of PET, its processing efficiency is low, and the rapid degradation of PET cannot be achieved, which greatly limits the recovery of PET. use

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

[0045] A preparation method of fibers for medical fabrics, the steps are as follows:

[0046] (1) Preparation of heterogeneous solid acid-base SiO 2 -Al 2 o 3 ;

[0047] Formulated SiO 2 For a sodium silicate solution with a content of 12wt%, add polyethylene glycol 6000, a solution dispersant that is 4% by weight of the sodium silicate solution, stir until dissolved at 45°C, and add a sulfuric acid solution with a concentration of 12wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 1.0 h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 95°C, age for 2 h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 80°C, and grinding to obtain the product silica powder;

[0048] Weigh 1 part by weight of silica powder and add 55 parts by weight of water, stir and disperse, add 2 parts by weight of aluminum sulfate solution...

Embodiment 2

[0059] A preparation method of fibers for medical fabrics, the steps are as follows:

[0060] (1) Preparation of heterogeneous solid acid-base SiO 2 -MgO;

[0061] Formulated SiO 2 For a sodium silicate solution with a content of 10 wt%, add a solution dispersant polyethylene glycol 6000 which is 3% by weight of the sodium silicate solution, stir until dissolved at 40°C, and add a sulfuric acid solution with a concentration of 10 wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 0.5h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 90°C, age for 2h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 80°C, and grinding to obtain the product silica powder;

[0062] Weigh 1 part by weight of silica powder and add 50 parts by weight of water, stir and disperse, add 3 parts by weight of magnesium sulfate solution with a...

Embodiment 3

[0071] A preparation method of fibers for medical fabrics, the steps are as follows:

[0072] (1) Preparation of heterogeneous solid acid-base SiO 2 -Al 2 o 3 ;

[0073] Formulated SiO 2 For a sodium silicate solution with a content of 10 wt%, add a solution dispersant polyethylene glycol 6000 which is 3% by weight of the sodium silicate solution, stir until dissolved at 40°C, and add a sulfuric acid solution with a concentration of 10 wt% dropwise at a uniform speed to The pH value of the solution is 10. After aging for 0.5h, continue to add sulfuric acid solution drop by drop until the pH value is 8. After heating up to 90°C, age for 2h; wash with water to remove SO 4 2- Suction filtration, washing with absolute ethanol several times, drying in a drying oven at 85°C, and grinding to obtain the product silica powder;

[0074] Weigh 1 part by weight of silica powder and add 60 parts by weight of water, stir and disperse, add 2 parts by weight of aluminum sulfate solution...

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 a fiber for medical fabrics and a preparation method of the fiber. The preparation method comprises the step that cationic polyester FDY yarn is prepared from cationic polyester according to the FDY technology to obtain the fiber for the medical fabrics, wherein nano-silver zeolite powder and SiO2-Al2O3 powder and / or SiO2-MgO powder which is / are sintered at the high temperature of 400-700 DEG C are dispersed in the cationic polyester, and molecular chain of the cationic polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a m-benzenedisulfonic acid disodium salt chain segment. After the prepared fiber for the medical fabrics is placed for 60 months under the condition that the temperature is 25 DEG C and the relative humidityis 65%, the characteristic viscosity of the fiber is reduced by 10-15%. The preparation method is simple in process and low in cost; the prepared product is high in natural degradation rate and good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of medical fibers, and relates to a fiber for medical fabrics and a preparation method thereof. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety in synthetic fibers. It is made from terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) through esterification Or the fiber-forming high polymer prepared by transesterification and polycondensation reaction - polyethylene terephthalate (PET), and then the fiber made by spinning and post-processing. With the continuous improvement of human living standards, the fields of clothing and decoration have put forward higher requirements for the quality of fibers. In order to meet people's ever-increasing needs, it is urgent to develop differentiated products with high added value. [0003] At present, PET fiber is widely used. Although PET will not directly cause harm t...

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): D01F6/92D01F1/10C08G63/688
Inventor 范红卫汤方明王山水
Owner JIANGSU HENGLI CHEM FIBER
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