Composite core and manufacturing method thereof

Abstract

The invention discloses a composite core. The composite core comprises a surface layer, a bottom layer and an absorption layer located between the surface layer and the bottom layer, wherein the absorption layer comprises at least one water absorption fiber layer and SAP spread on the upper and lower surfaces of the water absorption fiber layers and in the gap; at least one flow guide hole is formed between the surface layer and the uppermost water absorption fiber layer; the flow guide hole runs through the surface layer; at least one flow guide channel is formed between the bottom layer andthe bottommost water absorption fiber layer. The invention further provides a manufacturing method of the composite core. The absorption mode of the composite core is converted to cross-layer diffusion quick conduction absorption from layer-by-layer transfer absorption from the outside to the inside, so that the absorption speed of liquid entering different layers of the core is greatly increased,the multi-time absorption performance, air permeability and liquid permeability of the core are remarkably improved, and the temporary liquid storage capacity and utilization rate of the core body are greatly improved.

Description

technical field [0001] The invention belongs to the field of sanitary products, and in particular relates to a composite core and a manufacturing method thereof. Background technique [0002] The currently known absorbent cores for treating human excreta can be roughly divided into two types. One is the cotton core, which is composed of dust-free paper or hydrophilic cloth wrapped fluff pulp and SAP (super absorbent resin). The other is a composite core, which generally consists of the outermost two layers of dust-free paper, the middle layer of non-woven fabric, and two layers of SAP. [0003] The fluff pulp mixed with SAP (super absorbent resin) in the cotton core has excellent instantaneous liquid-catching ability, but the water-absorbing material is easy to slide, deform, accumulate and break after absorbing. Therefore, in the industry around 2006, the common composite cores on the market were successively developed. The composite cores overcome the shortcomings of cot...

AI Technical Summary

Problems solved by technology

However, the composite core has poor instantaneous liquid-capturing ability. During secondary absorption from the surface to the inside, it is easy to block the infiltration channel due to the gel phenomenon of the superabsorbent resin after the surface absorbs liquid, resulting in secondary absorption leakage. The overall utilization rate is low, and it is difficult for the liquid to quickly transfer to the interior of the core and spread to the surroundings

[0004] Some manufacturers try to press-cut and split the core to form grooves on the composite core. Such grooves that run through the entire core from top to bottom do not significantly improve the conductivity, and the liquid does not flow down from the grooves. Effectively reach the middle layer of the core body for diffusion conduction, which cannot improve the utilization rate of the core body and the effect of cross-layer conduction, and also causes a large amount of water-absorbent resin near the trench opened during the production process to drop

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