Water absorption core and preparation method and application thereof

Abstract

The invention relates to a water absorption core and a preparation method and application thereof. The preparation method of the water absorption core includes the following steps: loosening and combing chemical fibers, laying the fibers on a first guide layer formed by molding a first mixture to form a fluffy cotton layer to obtain a first laminated member; conducting hot air penetration shapingon the first laminated member, laying macromolecule water absorbing resin powder on the fluffy cotton layer to disperse the polymer water absorbing resin powder in the fluffy cotton layer to form a water absorbing layer between the polymer water absorbing resin powder and the fluffy cotton layer; molding a second mixture, conducting hot air penetration shaping to form a second guide layer, laminating the second guide layer on the water absorbing layer to obtain a second laminated member, wherein the first mixture and the second mixture both comprise fluff pulp and hot melt fibers; conducting hot air penetration shaping on the second laminated member to obtain the water absorbing core. The water absorbing core body is not prone to layering after absorbing water and swelling, and good in water absorbing effect and water locking effect.

Description

technical field [0001] The invention relates to the field of sanitary products, in particular to a water-absorbing core and its preparation method and application. Background technique [0002] Usually, diapers, sanitary napkins, etc. need to have better water absorption performance, so they generally have water absorption cores. At present, there are two main production methods for water-absorbent cores. One method is to use fluff paddles and polymer water-absorbent resin (SAP, SUPERABSORBENTPOLYMER,) to mix online. Although the cost is low, the product diffuses quickly and has good multiple absorption effects. However, after the water-absorbent resin swells after absorbing water, the connection between the fluff pulp is poor and it is easy to break and swell, which not only affects the comfort of use, but also affects the effective use time. In order to avoid the swell, the manufacturer reduces the amount of water-absorbent resin. , but it reduces the water absorption and...

AI Technical Summary

Problems solved by technology

At present, there are two main production methods for water-absorbent cores. One method is to use fluff paddles and polymer water-absorbent resin (SAP, SUPERABSORBENTPOLYMER,) to mix online. Although the cost is low, the product diffuses quickly and has good multiple absorption effects. However, after the water-absorbent resin swells after absorbing water, the connection between the fluff pulp is poor and it is easy to break and swell, which not only affects the comfort of use, but also affects the effective use time. In order to avoid the swell, the manufacturer reduces the amount of water-absorbent resin. , but it reduces the water absorption and use time of the product, and the absorption effect is not good

Another way is to use fluffy non-woven fabrics to fix the SAP, and use hot-melt composite expanded paper (or dust-free paper, non-woven fabrics, etc.) on the upper and lower sides respectively, and obtain products after winding and cutting, although the products obtained by this method The problem of breaking and lifting has been improved, but the polymer water-absorbing resin has obvious delamination after absorbing water and swelling, and the repeated water absorption effect is poor, and the water locking effect is poor, which leads to serious reverse osmosis

Images