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Coating agent for nappy fiber paper for diapers and preparation method thereof

The technology of fiber paper and coating agent is applied in the field of pulping and papermaking, which can solve the problems of low papermaking strength of absorbing layer fluffed fibers, and achieve the effects of improving social and economic benefits, high reactivity and high tensile strength

Active Publication Date: 2018-10-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coating agent for nappy fiber paper for diapers, which solves the problem of low papermaking strength of fluffed fiber paper in the leftover material absorption layer of diapers

Method used

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preparation example Construction

[0020] The preparation method of the above-mentioned coating agent for fluffy fiber paper for diapers is to stir starch with a concentration of 8% in a water bath at a temperature of 80°C to 90°C for 30 to 40 minutes to make it gelatinized, and then add water-based polyurethane and nanocrystalline Cellulose, stir well until evenly mixed.

[0021] (1) Reasons for choosing water-based polyurethane and nano-microcrystalline cellulose as coating agent components

[0022] Since the main component of the absorbent layer of diapers is fluffed wood fiber, the strength of the fiber itself decreases after fluffing treatment, resulting in low paper strength, and the phenomenon of paper lint and powder falling is serious, so it is considered to use a reinforcing coating. fabric to improve its strength properties. Because water-based polyurethane can form a film on the surface of the fiber to achieve a better sizing effect, it can improve the mechanical properties, water resistance, solve...

Embodiment 1

[0029] Place starch with a concentration of 8% in a water bath for gelatinization, the temperature of the water bath is 80°C to 90°C, and stir continuously with a mechanical stirrer during the gelatinization process; after the starch is gelatinized, add water-based polyurethane in an amount equal to the starch mass 1% of the starch; the nano-microcrystalline cellulose is added in an amount of 1% of the starch mass, and stirred evenly. Use this coating agent to coat and heat calender the fluffy fiber paper of the absorbent layer of diapers.

Embodiment 2

[0031] Place starch with a concentration of 8% in a water bath for gelatinization, the temperature of the water bath is 80°C to 90°C, and stir continuously with a mechanical stirrer during the gelatinization process; after the starch is gelatinized, add water-based polyurethane in an amount equal to the starch mass 2% of 2%; the addition of nano-microcrystalline cellulose is 1% of the starch mass, and the mixture is evenly stirred. Use this coating agent to coat and heat calender the fluffy fiber paper of the absorbent layer of diapers.

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PUM

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Abstract

The invention discloses a coating agent for fluffed fiber paper of a paper diaper. The coating agent is prepared from starch, waterborne polyurethane and nano-microcrystalline cellulose. A preparation method of the coating agent comprises: stirring the starch with the concentration of 8 percent in a water bath so as to gelatinize the starch; then sequentially adding the waterborne polyurethane and the nano-microcrystalline cellulose, and sufficiently stirring until the materials are uniformly mixed. The coating agent for the fluffed fiber paper of the paper diaper, provided by the invention, has relatively good mechanical properties, water resistance, solvent resistance, anti-ageing performance and reinforcement performance. The strength performance of the fluffed fiber paper of a leftover material absorption layer of the paper diaper is obviously improved, and the recycling utilization rate of fibers is improved.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a coating agent for nappy fiber paper for diapers, and also relates to a preparation method of the coating agent. Background technique [0002] The main component of diapers, the absorbent layer, is mainly composed of fluffy fibers. If it is recycled for papermaking, it will be beneficial to environmental governance and save resources. However, the fibers in the absorbent layer of diapers are fluffy fibers, and their paper-forming properties are poor. To improve their utilization, it is necessary to improve the paper-forming strength performance, otherwise the paper-forming strength performance will be affected. [0003] In the field of diapers, researchers at home and abroad have been working on the application performance of diapers such as liquid absorption performance, water retention performance, water absorption rate, ammonia absorption performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/57D21H17/25D21H17/28D21H21/18D21H21/16D21H21/14D21H11/14
CPCD21H11/14D21H17/25D21H17/28D21H17/57D21H21/14D21H21/143D21H21/16D21H21/18
Inventor 孟卿君杨保宏张素风徐永射
Owner SHAANXI UNIV OF SCI & TECH
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