Adhesive-free reverse-absorption water-absorbing core body and preparation process thereof

Abstract

The invention relates to an adhesive-free reverse-absorption water-absorbing core body and a preparation process thereof. The core body comprises an upper layer ES chemical fiber layer, a middle polymer water-absorbing resin layer and a lower layer wood pulp ES chemical fiber mixed layer, and the upper layer ES chemical fiber layer and the lower layer wood pulp ES chemical fiber mixed layer wrap the middle polymer water-absorbing resin layer in the middle, and the upper layer ES chemical fiber layer and the lower layer wood pulp ES chemical fiber mixed layer are formed into an integrated structure by heat treatment. The ES chemical fiber layer and the wood pulp ES chemical fiber mixed layer of the core body can form the molded body without an adhesive through heat treatment, and compared with the case of using an adhesive for binding, the core body provided by the invention has a fast liquid infiltration rate, so that the upper layer is guaranteed to be dry to the maximum extent, and at the same time, the preparation is more environmentally friendly and hygienic.

Description

technical field [0001] The invention belongs to the technical field of hygiene products, and in particular relates to a glue-free reverse-absorbing water-absorbing core and a preparation process thereof. Background technique [0002] Absorbent cores have a wide range of uses. At present, the absorbent cores of hygienic products on the market, such as sanitary napkins or diapers, are usually made of fluff pulp or non-woven fabrics. A polymer water-absorbing layer is added to the core. Since this water-absorbing core is very dense, the absorption and diffusion of liquid are very slow. If the liquid cannot be absorbed in a short time, it will bring discomfort and trouble to the user, and cannot meet the requirements. Users demand that they be able to absorb a large amount of liquid in a short period of time. [0003] Chinese patent CN209392255U discloses a hygienic water-absorbing core body, the water-absorbing core body includes an upper layer of non-woven fabric, a middle la...

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Problems solved by technology

[0004] In the water-absorbing core of the sanitary product disclosed above, the upper non-woven fabric, the middle non-woven fabric and the lower dust-free paper are all bonded by an adhesive, and a layer of film will be formed after the adhesive is dried, thereby Prevent water seepage, resulting in slow infiltration speed, water stays on the surface of the upper non-woven fabric, affecting skin health

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