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Water-absorbent core and its preparation method and application

A technology of water-absorbent core and water-absorbent layer, which is applied in the field of sanitary products, can solve the problems of obvious layering, poor connectivity, and affecting comfort, and achieve the effect of ensuring expansion space, avoiding layering problems, and good absorption effect

Active Publication Date: 2021-10-01
陈建辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Water-absorbent core and its preparation method and application
  • Water-absorbent core and its preparation method and application
  • Water-absorbent core and its preparation method and application

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preparation example Construction

[0037] Such as figure 1 Shown, the preparation method of the water-absorbent core body of an embodiment, comprises the following steps:

[0038] Step S110: Molding the first mixed material to form a first flow-guiding layer.

[0039] Specifically, the first flow guide layer is in the shape of a sheet. Wherein, according to mass percentage, the first mixed material includes 50%-99% fluff pulp mixed with 1%-50% hot-melt fiber.

[0040] Wherein, fluff pulp is straw pulp or wood pulp, preferably wood pulp. Because the fibers in straw pulp are short, the diversion effect is poor, while compared with straw pulp, the fibers in wood pulp are longer and have better diversion effect.

[0041] Among them, the hot-melt fiber includes polypropylene fiber and polyethylene fiber. Specifically, in the hot-melt fibers, the mass ratio of polypropylene fibers to polyethylene fibers is (2-5):(5-8).

[0042] Among them, the length of the hot-melt fiber is 3 mm to 8 mm, and the specification i...

Embodiment 1

[0085] The preparation process of the water-absorbent core of the present embodiment is as follows:

[0086] (1) Pulverize the fluff pulp and pass it through a mesh sieve with a diameter of 5 mm, then mix the fluff pulp with the hot-melt fiber according to the mass percentage of 80%:20%, to obtain the first mixed material. Air pressure molding is performed on the first mixed material to obtain the first flow-guiding layer. Among them, the fluff pulp is wood pulp; the hot-melt fiber is polypropylene fiber and polyethylene fiber, the mass percentage of polypropylene fiber and polyethylene fiber is 4:6, the length of hot-melt fiber is 3 mm to 8 mm, and the specification is 3D .

[0087] (2) The chemical fiber is vibrated in the bale opener, and sent to the opener by air for stretching. The chemical fiber after stretching is sent into the final cotton box for storage by air, and then sent into the automatic cotton box by air. Quantitatively carried out in the carding machine and t...

Embodiment 2

[0095] The preparation process of the water-absorbent core of the present embodiment is as follows:

[0096] (1) Pulverize the fluff pulp and pass it through a mesh sieve with a diameter of 2.5 mm, then mix the fluff pulp with the hot-melt fiber according to the mass percentage of 64.7%:35.3%, to obtain the first mixed material. Air pressure molding is performed on the first mixed material to obtain the first flow-guiding layer. Among them, the fluff pulp is wood pulp; the hot-melt fiber is polypropylene fiber and polyethylene fiber, the mass percentage of polypropylene fiber and polyethylene fiber is 2:5, the length of hot-melt fiber is 3 mm to 8 mm, and the specification is 2D .

[0097] (2) The chemical fiber is vibrated in the bale opener, and sent to the opener by air for stretching. The chemical fiber after stretching is sent into the final cotton box for storage by air, and then sent into the automatic cotton box by air. Quantitatively carried out in the carding machi...

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Abstract

The invention relates to a water-absorbing core body and its preparation method and application. The preparation method of the water-absorbent core comprises the following steps: loosening and carding the chemical fibers and laying them on the first flow-guiding layer obtained by molding the first mixed material to form a fluffy cotton layer to obtain a first laminate; The hot air penetration and shaping of the piece, and then laying the polymer water-absorbent resin powder on the fluffy cotton layer, so that the polymer water-absorbent resin powder is dispersed in the fluffy cotton layer, and the polymer water-absorbent resin powder and the fluffy cotton layer jointly form a water-absorbing layer; The second mixed material is molded, and then hot air is penetrated and shaped to form a second flow guide layer, and the second flow guide layer is laminated on the water-absorbing layer to obtain a second laminate, wherein the first mixed material and the second mixed material are both It includes fluff pulp and hot-melt fibers; the second laminated piece is penetrated and shaped by hot air in sequence to obtain a water-absorbent core. The above-mentioned water-absorbing core body is not easy to delaminate after absorbing water and expands, and has better water-absorbing effect and better 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F13/15A61F13/53A61F13/537
CPCA61F13/15577A61F13/15723A61F13/15764A61F13/53A61F13/537A61F2013/15463A61F2013/15821A61F2013/530226A61F2013/530481A61F2013/530708
Inventor 陈建辉
Owner 陈建辉
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