Preparation method of water-absorbing material

Abstract

The invention relates to a manufacturing method of a water-absorbing material. The manufacturing method comprises the following steps: (1) respectively carrying out net forming on surface slurry and bottom slurry to obtain wet surface-layer paper and wet bottom-layer paper, wherein the relative moisture content of the wet surface-layer paper and the wet bottom-layer paper is 50-80%; (2) spraying high-molecular water-absorbent resin on the wet surface-layer paper and the wet bottom-layer paper prepared in the step (1) respectively, and compounding the wet surface-layer paper and the wet bottom-layer paper which are respectively sprayed with the high-molecular water-absorbent resin to prepare a wet paper sheet; and (3) sequentially squeezing and drying the wet paper sheet prepared in the step (2) to prepare the water-absorbing material. The method disclosed by the invention adopts a compounding mode of wet compounding the high-molecular water-absorbent resin, the high-molecular water-absorbent resin is completely embedded in paper sheet fibers, so the contact area of the high-molecular water-absorbent resin and the paper sheet fibers is greatly increased, the conductivity of the paper sheet fibers and the high-molecular water-absorbent resin to liquid is enhanced, and the water absorption capacity and the water absorption speed of the water-absorbing material are greatly improved.

Description

[0001] This application is a divisional application of an invention patent application with an application date of "October 17, 2017", an application number of "201710966882.0", and an invention title of "A Method for Making a Water-absorbing Material". technical field [0002] The invention relates to the technical field of water-absorbing materials, in particular to a method for making water-absorbing materials. Background technique [0003] In the wood pulp core structure of high-absorbent products, the absorbent polymers and wood pulp are mainly used for absorption. At present, the composite method of water-absorbing resin and wood pulp paper is dry compounding. After spraying glue on the surface of the wood pulp layer, the polymer water-absorbing resin is dispersed on the surface of the wood pulp paper layer. Dry glue spray compounding will not only cause hygienic hazards to water-absorbing materials, but also affect the water absorption speed after the glue dries; more...

AI Technical Summary

Problems solved by technology

Dry glue spray compounding will not only cause hygienic hazards to water-absorbing materials, but also affect the water absorption speed after the glue dries; moreover, due to insufficient compounding during the application process after compounding, part of the polymer water-absorbing resin will leak and affect the water absorption.

After dry compounding, the polymer water-absorbing resin is distributed on the surface of the paper, and the contact with the wood pulp fiber is not sufficient, resulting in poor conductivity of the water-absorbing structure layer to the liquid, which affects the water absorption speed

[0004] At present, there is no report on the method of making water-absorbing materials by using wet-process composite polymer water-absorbing resins.

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