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Multilayer core body and preparation method thereof

A core and porous layer technology, applied in the field of diapers, can solve the problems of thick diapers, lumps, faults, etc.

Inactive Publication Date: 2021-04-09
FUJIAN HENGAN HLDG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1980s, polymer water-absorbing materials were used, which greatly improved the water-absorbing performance. This can be called the second-generation product of diapers. However, the diapers are generally thicker, and they are prone to reverse osmosis, lumps, and even faults after absorbing water.

Method used

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  • Multilayer core body and preparation method thereof

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preparation example Construction

[0031] [Manufacturing method of multilayer core according to an embodiment of the present invention]

[0032] According to the preparation method of the multi-layer core body of the embodiment of the present invention, refer to figure 2 , the preparation method comprises:

[0033] Mixture proportioning step: proportioning the corresponding A mixture, B mixture and C mixture of the upper absorbent layer 1, the middle absorbent layer 2 and the lower absorbent layer 3;

[0034] Extrusion molding step: input the proportioned A mixture, B mixture and C mixture into the corresponding feed holes of the extrusion device respectively, and extrude and form through the extrusion device;

[0035] Cutting and molding step: cutting and separating the shaped cores to form several cores.

[0036] Preferably, the A mixture, the B mixture and the C mixture all include raw materials, pore-forming agents and water-retaining materials, and the upper absorbent layer 1, the middle absorbent layer...

Embodiment 1

[0045] Prepare the raw materials for preparing the core, NaHCO 3 , SAP powder, mix them and stir evenly to make A mixture, B mixture and C mixture, NaHCO in A mixture, B mixture and C mixture 3 The addition amount decreases sequentially, and the addition amount of SAP powder increases sequentially. The A mixture, the B mixture and the C mixture are respectively passed into the mixing chamber, and are transported to the multi-layer co-extrusion composite distributor through the corresponding feeding hole by the metering pump. Extruded through a slit die, finally foamed and matured to form upper absorbent layer 1, middle absorbent layer 2 and lower absorbent layer 3, and finally upper absorbent layer 1, middle absorbent layer 2 and lower absorbent layer 3 are bonded by hot melt adhesive Composite, and finally cut into cores.

Embodiment 2

[0047] Prepare the raw materials for preparing the core, NaHCO 3 , SAP powder, NaCl, mix them and stir evenly to make A mixture, B mixture and C mixture respectively, NaHCO in A mixture, B mixture and C mixture 3 The amount of addition decreases in turn, and the amount of SAP powder added in turn increases. The A mixture, B mixture and C mixture are respectively passed into the mixing chamber, and are transported to the multi-layer co-extrusion compound distributor through the corresponding feeding hole by the metering pump. Extruded through a slit die, finally foamed and matured to form upper absorbent layer 1, middle absorbent layer 2 and lower absorbent layer 3, and finally upper absorbent layer 1, middle absorbent layer 2 and lower absorbent layer 3 are bonded by hot melt adhesive Composite, and finally cut into cores.

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Abstract

The invention discloses a multi-layer core body and a preparation method thereof. The multi-layer core body comprises a core body, the core body comprises at least two overlapped absorption layers, the absorption layers can absorb and store liquid, the absorption layers are all porous layers, and apertures of the absorption layers sequentially arranged on the core body in the flow direction of the liquid are sequentially reduced; the core body comprises three overlapped absorption layers, namely an upper absorption layer, a middle absorption layer and a lower absorption layer, and the aperture ratios and apertures of the upper absorption layer, the middle absorption layer and the lower absorption layer are sequentially reduced; the three layers enable rapid downward penetration of the liquid, the middle absorption layer and the lower absorption layer are provided with a plurality of water retention materials, so that the liquid can be quickly absorbed and stored without reverse osmosis, meanwhile, the upper absorption layer is softer and more comfortable, and the flow rate of the liquid is effectively increased through added inorganic salt.

Description

technical field [0001] The invention relates to the field of paper diapers, in particular to a multilayer core and a preparation method thereof. Background technique [0002] The upgrading of diapers of course depends on its core technology - the core. The quality of the core determines the performance of the diaper. The core body of the first diaper is a pure wood pulp structure, and the low absorption capacity, reverse osmosis, clumping, and faults are the stubborn problems of the first generation of diapers. In the 1980s, polymer water-absorbing materials were used, which greatly improved the water-absorbing performance. This can be called the second-generation product of diapers. However, the diapers are generally thicker, and they are prone to reverse osmosis, lumps, and even faults after absorbing water. Contents of the invention [0003] The object of the present invention is to overcome the above disadvantages, and provide a multi-layer core and a preparation met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F13/534A61F13/537A61F13/15
CPCA61F13/15577A61F13/534A61F13/53713A61F2013/53782
Inventor 翁文伟林一速祝二斌
Owner FUJIAN HENGAN HLDG CO LTD
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