Preparation method and application of microporous ultrafine polymer polyurethane core material

Abstract

An embodiment of the present invention provides a method for preparing a microporous ultrafine polymer polyurethane core material. The raw material of the polymer water-absorbing resin is pulverized into granular ultrafine polymer water-absorbing resin with a particle size of 25 μm-125 μm, and the ultrafine Polymer water-absorbent resin and matrix components are compounded to prepare a density of 75-95kg / m 3 , the porosity of 30%-80%, and the polyurethane core material of 2-8% resilience, on the one hand, the polymer water-absorbing resin is not easy to fall off or powder from the skeleton, and at the same time, it reduces the blocking effect of the polymer water-absorbing resin , to form greater water absorption, faster water absorption rate and lower rewet volume, and at the same time, the invention also provides a core material and a disposable absorbent product prepared according to the preparation method of the microporous ultrafine polymer polyurethane core material.

Description

technical field [0001] The invention relates to a preparation method of a microporous ultrafine macromolecule polyurethane core material, a microporous ultrafine macromolecule polyurethane core material and applications thereof. Background technique [0002] With the improvement of people's living standards and the development of sanitary material technology, disposable absorbent articles have been widely used. Disposable absorbent articles usually include sanitary napkins, diapers, sanitary pads, breast pads and other products. Such products are usually provided with core materials with absorption and liquid storage capabilities. These core materials are usually made of fluff pulp, superabsorbent resin ( SAP resin) is uniformly mixed. [0003] However, as people's requirements for disposable absorbent products are getting higher and higher, the existing core materials formed by mixing fluff pulp and SAP can no longer fully meet the needs. Fluff pulp has better molding pro...

AI Technical Summary

Problems solved by technology

But, the sponge material that these prior art provides at present is added with SAP has the following problems in use, and the one, SAP is in sponge material and it comes off easily, causes the perplexity in use; After expansion, it is still easy to form colloid blockage, which reduces the efficiency of subsequent liquid absorption; third, after SAP absorbs liquid and expands, it forms larger particles, which makes the core harden on the one hand, but also prevents other areas from achieving water retention through SAP , resulting in high rewetting. In addition, the shedding problem of SAP added in the sponge material is a technical problem that has plagued those skilled in the art for a long time.

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