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Preparation method and application of absorption material with high absorption capacity

An absorbent material and high-absorption technology, which can be used in absorbent pads, medical science, bandages, etc., can solve problems such as easy-to-contaminate bacteria and mildew, difficulties in mass production, unstable absorption and mechanical properties, etc., to achieve easy construction, product safety, The effect of easy operation

Pending Publication Date: 2019-12-17
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this solution, the gelation of the white material is not easy to mix evenly, and the reaction process is too long, which is not conducive to production
[0006] Absorbent materials prepared by the prior art have disadvantages such as susceptibility to bacteria and mildew, unstable absorption and mechanical properties, and difficulty in mass production. It is necessary to develop an absorbent material suitable for medical and health products and other fields.

Method used

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  • Preparation method and application of absorption material with high absorption capacity
  • Preparation method and application of absorption material with high absorption capacity
  • Preparation method and application of absorption material with high absorption capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1) prepare 75mL concentration of 1wt% 188 aqueous phase solution;

[0073] 2) Add 10 g of superabsorbent polymer with a moisture content of less than 5% to 100 g of isocyanate group-terminated polyurethane prepolymer TP1 WHS-818H, stir and mix at 250rpm;

[0074] 3) Pour all the aqueous phase solution into the above-mentioned polyurethane prepolymer containing superabsorbent polymer quickly, use mechanical stirring at 4000rpm high-speed stirring for 10s, quickly transfer the obtained milky white viscous liquid to the release paper, and put it on the Add another layer of release paper on the surface, wait for 300s, remove the upper and lower layers of release paper, and obtain a composite foam with fixed structure and certain mechanical strength;

[0075] 4) The composite foam obtained in step 3) is dried in a microwave oven for 120 s to remove moisture, and an absorbent material with a cellular structure and high absorption capacity is obtained.

Embodiment 2

[0077] 1) prepare 180mL concentration of 3wt% 182 aqueous phase solution, which contains 0.1wt% ε-polylysine E-PLA;

[0078] 2) Add 50 g of superabsorbent polymer with a moisture content of less than 5% to 100 g of isocyanate group-terminated polyurethane prepolymer TP1 WHS-736, 300rpm slow mixing;

[0079] 3) Pour all the aqueous phase solution into the above-mentioned polyurethane prepolymer containing superabsorbent polymer quickly, use mechanical stirring at 5000rpm high-speed stirring for 5s, quickly transfer the obtained milky white viscous liquid to the release paper, and put it on the Add another layer of release paper on the surface, wait for 300s, remove the upper and lower layers of release paper, and obtain a composite foam with fixed structure and certain mechanical strength;

[0080] 4) Dry the composite foam obtained in step 3) in a hot air oven at 50° C. for 12 hours to remove moisture, and obtain an absorbent material with a cell structure and high absorpti...

Embodiment 3

[0082] 1) Prepare 100 mL of an aqueous phase solution with a concentration of 1 wt% APG0810 and a concentration of methylene blue of 0.015 wt %;

[0083] 2) To 100g isocyanate group-terminated polyurethane prepolymer Add 30g superabsorbent polymer with moisture content below 5% to CST WHS-818H, 250rpm slow stirring and mixing;

[0084] 3) Pour all the aqueous phase solution into the above-mentioned polyurethane prepolymer containing superabsorbent polymer quickly, use mechanical stirring at 4000rpm high-speed stirring for 10s, quickly transfer the obtained milky white viscous liquid to the mold, wait for 200s, and remove from the mold out of the middle, to obtain a composite foam with a fixed structure and a certain mechanical strength;

[0085] 4) The composite foam obtained in step 3) is dried in a microwave oven for 200 s to remove moisture, and an absorbent material with a cell structure and high absorption capacity is obtained.

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Abstract

The invention provides a preparation method of an absorption material with high absorption capacity and an application of the absorption material in medical and health products. The preparation methodof the absorption material with high absorption capacity comprises the following steps: 1) preparing an aqueous phase solution containing a surfactant; 2) preparing a polyurethane prepolymer which contains a super-water absorbent polymer and is terminated by an isocyanate group; 3) mixing the aqueous phase solution with the polyurethane prepolymer at a high speed, and quickly transferring the mixture to a mold or release paper to obtain a composite foam body; and (4) drying the composite foam obtained in the step (3) to remove moisture, so as to obtain the absorption material with a foam porestructure and high absorption capacity. The absorption material is particularly suitable for being used in the medical and health products, can be produced in a safe, simple and convenient mode, is high in biological safety, has good liquid absorption performance and low shrinkage rate, and can meet the dry and wet mechanical properties required by application.

Description

technical field [0001] The invention relates to a preparation method of an absorbent material with high absorption capacity and its application in the fields of medical and sanitary products and the like. Background technique [0002] Absorbent cores with liquid absorption capacity are widely used in disposable medical hygiene products, such as adult incontinence products, baby diapers, feminine sanitary napkins and medical wound dressings. In order to ensure the comfort of the final product, not only the absorbent core requires good liquid absorption capacity (including high absorption capacity and fast absorption rate), but also expects to have good liquid retention capacity under certain pressure. The superabsorbent resin (SAP) based on polyacrylic acid series has superior properties such as large water absorption capacity (about 20 times its own weight), fast water absorption speed, strong water retention capacity, non-toxic and tasteless, so it is often used in the prod...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/62C08G18/60C08G18/48C08G18/32C08G18/12C08J9/30A61L15/26A61L15/42A61L15/60C08G101/00
CPCC08G18/7614C08G18/4825C08G18/3206C08G18/12C08G18/6216C08G18/603C08J9/30A61L15/425A61L15/26A61L15/60C08J2375/08
Inventor 尹金超雷琪刘振东
Owner WANHUA CHEM GRP CO LTD
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