Absorbent core, absorbent core forming apparatus, and method of manufacturing an absorbent core

Abstract

The invention relates to the manufacture field of absorptive sanitary articles and automatic production equipment and discloses an absorptive core. The absorptive core comprises an absorptive core surface layer, an absorptive core middle layer and an absorptive core bottom layer, wherein the tightness degrees of the absorptive core middle layer and the absorptive core bottom layer are larger than the tightness degree of the absorptive core surface layer. The invention further discloses absorptive core molding equipment and an absorptive core manufacture method. The gathering degrees of fluff pulp fibers in the surface layer, the middle layer and the bottom layer of the absorptive core are from relative looseness to compactness, and the gradient density design can rapidly absorb body fluid, is favorable to fluid permeation and effectively reduces the possibility that the body fluid leaks from the absorptive sanitary articles. When the absorptive core of the structure is manufactured, a molding screen is effectively prevented from being blocked by high molecular absorption resin granules, time and cost which are spent on cleaning and maintaining the molding screen are saved, and the production efficiency of the absorptive core molding device is further improved.

Description

technical field [0001] The invention relates to the field of absorbent sanitary products and automatic production equipment manufacturing, in particular to an absorbent core, absorbent core molding equipment and a manufacturing method for the absorbent core. Background technique [0002] Sanitary napkins, diapers and other absorbent sanitary products are generally composed of a liquid-permeable top layer mainly used in contact with the skin, a liquid-impermeable bottom layer used in non-skin contact, and an absorbent core layer between the liquid-permeable top layer and the liquid-impermeable bottom layer, etc. Structural hierarchy composition. Among them, the absorbent core layer mainly has the functions of absorbing, storing, and locking body fluids, and is the key structural layer to measure the absorption performance of absorbent sanitary products. [0003] The absorbent core layer is generally designed by water-absorbent fibers and polymer absorbent resin particles acc...

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Problems solved by technology

[0006] In addition, the absorbent core is mainly composed of crushed fluff pulp single fiber and polymer absorbent resin particles in the fiber cavity, and is adsorbed in the three-dimensional screen forming mold by the negative pressure of the forming drum, and then formed into a certain three-dimensional shape by demoulding. The thicker the absorbent core, due to the fluff pulp fibers adsorbed at the bottom of the forming mold, the air pressure value received at the beginning is relatively stable. The denser the formed absorbent core is, the higher it goes up, that is, the upper layer of the forming mold. Influenced by the layer thickness of fluff pulp / polymer absorbent resin accumulated on the upper layer, the density of the absorbent core on the upper layer of the forming mold is poor, while each structural layer of the absorbent core formed after demolding presents: the upper layer is denser, the lower layer is looser, from the absorption From the perspective of the speed of body fluids, this is not conducive to the rapid absorption of fluids. If the absorption of body fluids is too slow, it is not conducive to the infiltration of fluids, which increases the probability of fluid leakage.

Thus affecting the use of absorbent hygiene products

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