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Hydrophobic cellulose non-woven fabric for medical health and preparation method thereof

A non-woven fabric, medical and health technology, applied in the field of fiber textiles, can solve the problems of high hydrophobicity and difficult to apply to the medical and health field, and achieve the effect of stable and durable hydrophobicity, moderate hydrophobicity and good air permeability

Active Publication Date: 2021-09-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the hydrophobicity of the hydrophobic cellulose fiber textiles in the prior art is too high to be suitable for the medical and health field, and to provide a kind of hydrophobic cellulose nonwoven fabric for medical and health and its preparation method

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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  • Hydrophobic cellulose non-woven fabric for medical health and preparation method thereof
  • Hydrophobic cellulose non-woven fabric for medical health and preparation method thereof
  • Hydrophobic cellulose non-woven fabric for medical health and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A method for preparing a hydrophobic cellulose nonwoven fabric for medical and sanitary use, the specific steps are as follows:

[0052] (1) Preparation of raw materials:

[0053] Cellulose fiber: viscose fiber; the linear density of viscose fiber is 4.5 μm, the length is 30 mm, and the dry breaking strength is 2.46 cN / dtex; aprotic solvent: n-hexane;

[0054] Catalyst: dibutyltin dilaurate;

[0055] Isocyanate: the structural formula is K-1 in Table 1;

[0056] (2) Send the cellulose fiber bag into the opener, enter the ultrasonic washing device to remove impurities after opening, and then enter the high-temperature drying device with a temperature of 95 ° C for 6 hours to remove water until the moisture content is 3wt% for later use;

[0057] (3) mixing the aprotic solvent, the catalyst and the isocyanate into an isocyanate solution for subsequent use; in the isocyanate solution, the content of the catalyst is 0.1wt%, and the content of the isocyanate is 10wt%;

[...

Embodiment 2

[0071] A method for preparing a hydrophobic cellulose nonwoven fabric for medical and sanitary use, the specific steps are as follows:

[0072] (1) Preparation of raw materials:

[0073] Cellulose fiber: lyocell fiber; the linear density of lyocell fiber is 3.9μm, the length is 34mm, and the dry breaking strength is 2.6cN / dtex;

[0074] Aprotic solvent: acetonitrile;

[0075] Catalyst: triethylamine;

[0076] Isocyanate: the structural formula is K-2 in Table 1;

[0077] (2) Send the cellulose fiber bag into the opening machine, enter the ultrasonic washing device to remove impurities after opening, and then enter the high-temperature drying device with a temperature of 99 ° C for 5.5 hours to remove water until the moisture content is 2.9 wt % for later use;

[0078] (3) mixing the aprotic solvent, the catalyst and the isocyanate into an isocyanate solution for subsequent use; in the isocyanate solution, the content of the catalyst is 0.3wt%, and the content of the isocyan...

Embodiment 3

[0086] A method for preparing a hydrophobic cellulose nonwoven fabric for medical and sanitary use, the specific steps are as follows:

[0087] (1) Preparation of raw materials:

[0088] Cellulose fiber: cotton fiber; the linear density of cotton fiber is 3.3μm, the length is 38mm, and the dry breaking strength is 2.48cN / dtex;

[0089] Aprotic solvent: tetrahydrofuran;

[0090] Catalyst: dibutyltin dilaurate;

[0091] Isocyanate: the structural formula is K-3 in Table 1;

[0092] (2) Send the cellulose fiber bag into the opening machine, enter the ultrasonic washing device to remove impurities after opening, and then enter the high-temperature drying device with a temperature of 103 ° C for 5 hours to remove water until the moisture content is 2.6 wt% for standby;

[0093] (3) mixing the aprotic solvent, the catalyst and the isocyanate into an isocyanate solution for subsequent use; in the isocyanate solution, the content of the catalyst is 0.6wt%, and the content of the is...

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Abstract

The invention relates to a hydrophobic cellulose non-woven fabric for medical health and a preparation method thereof. The preparation method comprises the following steps of carrying out hydrophobic modification on cellulose fibers, carding the cellulose fibers to form a web, and preparing the non-woven fabric by adopting a spunlace reinforcement process of the cellulose non-woven fabric, namely obtaining the hydrophobic cellulose non-woven fabric for medical health. The hydrophobic modification process comprises the following steps of mixing the cellulose fibers with an isocyanate solution, heating to 60-90 DEG C, and preserving heat for 5-20 minutes. The finally prepared hydrophobic cellulose non-woven fabric for medical health is formed by interweaving the hydrophobic cellulose fibers; the hydrophobic cellulose fibers are cellulose fibers with urethane bonds generated by a chemical grafting reaction of -OH and -NCO of isocyanate; and the water contact angle is 108-139 degrees, the air permeation volume is larger than or equal to 2400 L / (m<2>.s), the moisture permeation volume is larger than or equal to 9000 g / m<2>.d, and under the test of a Martindale type fabric wear resistance testing machine, the water contact angle of the fabric is reduced by not more than 2.8% after 2000 times of wear. The method is simple, and a used modifier does not contain fluorine, so that the method is environment-friendly and safe.

Description

technical field [0001] The invention belongs to the field of fiber textiles, and relates to a hydrophobic cellulose nonwoven fabric for medical hygiene and a preparation method thereof. Background technique [0002] The hydrophobicity of the material surface is generally characterized by the static water contact angle. When the water contact angle is greater than 90°, it is called a hydrophobic material, and when the water contact angle is greater than 150°, it is called a superhydrophobic material. Hydrophobic materials are widely used in the medical and health fields, such as Medical masks, surgical gowns, diapers, sanitary napkins and other surface layers, these surface materials are in direct contact with human skin, and their main functions are water conduction, quick drying, and moisture permeability, so hydrophobic non-woven fabrics with low hygroscopicity are usually used For woven fabrics, the water contact angle of surface materials used in the market is mostly in ...

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): D04H1/425D04H1/4258D04H1/492D06M13/395D06M101/06
CPCD04H1/425D04H1/492D04H1/4258D06M13/395D06M2101/06D06M2200/12Y02P70/62
Inventor 刘美王华平乌婧邹黎明
Owner DONGHUA UNIV
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