CN112294541A

CN112294541A - Paper diaper core with high water absorption and preparation method thereof

Info

Publication number: CN112294541A
Application number: CN202011144746.1A
Authority: CN
Inventors: 黄鹏飞; 黄腾龙
Original assignee: Fujian Era Tianhe Industrial Co ltd
Current assignee: Fujian Era Tianhe Industrial Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-02-02

Abstract

The invention relates to the technical field of paper diapers, in particular to a paper diaper core body with high water absorption and a preparation method thereof.

Description

Paper diaper core with high water absorption and preparation method thereof

Technical Field

The invention relates to the technical field of paper diapers, in particular to a paper diaper core with high water absorption and a preparation method thereof.

Background

The baby paper diaper is a disposable product and consists of a surface coating layer, an absorption core layer and a base fabric, and the materials of the baby paper diaper comprise non-woven fabrics, toilet paper, fluff pulp, high-molecular water-absorbent resin, a PE film, a rubber band and the like. The existing infant paper diaper structurally mainly comprises a paper diaper main body, a front waist piece and a rear waist piece, wherein the front waist piece is arranged at the front end of the paper diaper main body, the rear waist piece is arranged on the paper diaper main body, magic tapes are arranged on the rear waist piece, two longitudinal elastic ribs are respectively arranged on two side edges of the paper diaper main body, the paper diaper main body consists of a surface layer, a bottom film and a water absorption core layer positioned between the surface layer and the bottom film, urine is mainly absorbed by the water absorption core body, and therefore the water absorption performance of the paper diaper is mainly measured by the absorption capacity and the absorption speed of the core body.

The core mainly comprises multiple water-absorbing materials such as super absorbent resin, fluff pulp and paper handkerchief, and many at present strive for developing novel super absorbent resin for improving core water absorption performance, but its promotion to panty-shape diapers's speed of absorbing water is less, and this is because the urine leads to in can't getting into the core fast, if develop a novel core that urine can get into fast, to the absorption performance who improves the panty-shape diapers core, makes the urine absorb fast and will have positive meaning.

Disclosure of Invention

The invention aims to provide a paper diaper core with high water absorption and a preparation method thereof, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides a high-water-absorption paper diaper core body which comprises a non-woven fabric layer, an absorption layer and a water-repellent bottom film, wherein the absorption layer comprises an SAP absorption layer, a mixed fiber layer and a fluff pulp layer, SAP particles of the SAP absorption layer are in a porous shape, the mixed fiber layer is prepared by mixing low-melting-point fibers and high-melting-point fibers, the mixed fiber layer is arranged on two sides of the SAP absorption layer, the fluff pulp layer is connected with the mixed fiber layer, water-soluble fibers are mixed in the fluff pulp layer, and the non-woven fabric layer and the water-repellent bottom film are respectively arranged on two sides of the absorption layer.

Preferably, the mixed fiber layer is composed of PP fiber mixed with PLA fiber.

Preferably, the non-woven fabric layer is a super-transparent PLA hot air non-woven fabric.

Preferably, the water-repellent bottom film is a PP film.

Preferably, the water-soluble fiber is alginate fiber.

In addition, the invention also provides a preparation method of the high-water-absorption paper diaper core, which comprises the following steps:

(1) preparing porous SAP particles using a CO2 supercritical foaming process;

(2) disposing a mixed fiber layer on both sides of the SAP absorbent layer;

(3) connecting a fluff pulp layer mixed with water-soluble fibers with the mixed fiber layer;

(4) heating the material obtained in the step for 10-15 s, wherein the heating temperature is not lower than the melting point of the low-melting-point fibers in the mixed fiber layer and not higher than the melting point of the high-melting-point fibers in the mixed fiber layer;

(5) the materials are cut into proper shapes, and a non-woven fabric layer and a water-repellent bottom film are respectively stuck on two sides of the materials.

Further, in the step (5), the non-woven fabric layer and the water-repellent bottom film are bonded by ultrasonic waves to realize bonding.

Further, the low-melting-point fibers in the step (4) account for 10-20% of the total mass fraction of the mixed fiber layer.

The non-woven fabrics layer specifically adopts and gathers super hot-blast non-woven fabrics of penetrating PLA, and the PLA non-woven fabrics is soft to be felt, can adapt to the tender skin of uropoiesis organ well, and its porous structure is favorable to the urine to pass through fast, possesses good moisture absorption function and antibacterial function.

The SAP absorption layer refers to Super Absorbent resin (Super Absorbent Polymer), and the concrete implementation seeds adopt polyacrylic SAP, so that the SAP absorption layer has a series of advantages of low production cost, simple process, high production efficiency, strong water absorption capacity, long product quality guarantee period and the like, and is the type of SAP mainly adopted at present; the SAP particles are made into porous particles by a CO2 supercritical foaming process, both the supercritical foaming technology and the SAP belong to the technical content, and the specific technical parameters are not the content to be protected by the invention, so the SAP particles are not further disclosed.

The mixed fiber layer is formed by mixing low-melting-point fibers and high-melting-point fibers, and the low-melting-point fibers and the high-melting-point fibers are respectively PP fibers and PLA fibers.

The fluff pulp layer refers to the plant pulp obtained by a series of processing such as bleaching in the prior art, and has soft texture and good water absorption and elasticity.

The water-soluble fiber layer is water-soluble fiber which can be rapidly dissolved after being contacted with urine, a technician can change parameters such as the dissolving time and the dissolving shrinkage rate of the water-soluble fiber according to requirements, and the alginate fiber is adopted in specific implementation.

Compared with the prior art, the paper diaper core body with high water absorption provided by the invention has the following advantages:

according to the high-water-absorption paper diaper core body provided by the invention, the SPA particles with the microporous structure prepared by the supercritical foaming process are matched with the water-soluble fibers arranged in the fluff pulp layer, so that urine can quickly enter the core body and be absorbed by the SPA particles and the fluff pulp layer, the water absorption performance of the paper diaper is improved, the high-water-absorption paper diaper core body has practical significance and popularization value, and good economic benefits can be expected to be generated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic cross-sectional configuration of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

in the figure: the waterproof fabric comprises a non-woven fabric layer 1, an SAP absorption layer 21, a mixed fiber layer 22, a fluff pulp layer 23, water-soluble fibers 24 and a waterproof basement membrane 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

With reference to fig. 1-2, a method for preparing a high water absorption diaper core comprises the following steps:

(1) using CO₂Preparing porous SAP particles by a supercritical foaming process;

(2) arranging mixed fiber layers 22 formed by mixing PP fibers and PLA fibers on two sides of the SAP absorption layer 21, wherein the PP fibers account for 5% of the mass fraction of the mixed fiber layers 22;

(3) connecting a fluff pulp layer 23 mixed with 10% water-soluble fibers 24 to the mixed fiber layer 22;

(4) heating the material obtained in the above step for 15s, wherein the heating temperature is not lower than the melting point of the PP fibers in the mixed fiber layer 22 and not higher than the melting point of the PLA fibers in the mixed fiber layer 22;

(5) the materials are cut into proper shapes, and a non-woven fabric layer 1 and a water-repellent bottom film 3 are respectively adhered to two sides of the materials through ultrasonic bonding.

Example 2

(2) arranging mixed fiber layers 22 formed by mixing PP fibers and PLA fibers on two sides of the SAP absorption layer 21, wherein the PP fibers account for 10% of the mass fraction of the mixed fiber layers 22;

Example 3

(2) arranging mixed fiber layers 22 formed by mixing PP fibers and PLA fibers on two sides of the SAP absorption layer 21, wherein the PP fibers account for 15% of the mass fraction of the mixed fiber layers 22;

Example 4

(2) arranging mixed fiber layers 22 formed by mixing PP fibers and PLA fibers on two sides of the SAP absorption layer 21, wherein the PP fibers account for 20% of the mass fraction of the mixed fiber layers 22;

Example 5

(2) arranging mixed fiber layers 22 formed by mixing PP fibers and PLA fibers on two sides of the SAP absorption layer 21, wherein the PP fibers account for 25% of the mass fraction of the mixed fiber layers 22;

TABLE 1 physical Properties test of examples

Example numbering	WVTR/g/m²·24h	Hydrostatic pressure/mmH resistance₂O	Core body hand feeling
				1	8725	510	Softness
2	8715	510	Softness
				3	8720	510	Is softer
4	8725	510	Is softer
				5	8720	510	Is harder

The low-melting-point PP fibers in the mixed fiber layer 22 mainly play a role in bonding, and after heating, the PP fibers melt to bond SAP particles in the SAP absorption layer 21, so that the SAP particles can be fixed, and the SAP particles are prevented from moving in the core body; as shown in table 1, increasing the proportion of low-melting-point fibers in the mixed fiber layer 22 has little effect on the absorption performance of the core, but too high a mass fraction of low-melting-point fibers results in a hard feel of the core and poor wearing comfort.

The working principle of the invention is as follows: the SAP particles in the SAP absorption layer 21 are prepared to be porous by a supercritical foaming technology, the contact area of the SAP particles and urine can be increased by the porous surface, the water absorption speed of the SAP particles is further increased, in addition, the urine can be absorbed by the through holes on the surface of the SAP particles through capillary action, and the water absorption efficiency of the SAP to the urine can be increased; in the urine passes through non-woven fabrics layer 1 entering absorbing layer, SAP absorbed layer 21 can the primary absorption, and the urine that does not absorb will contact with fine hair thick liquid layer 23 fast through SAP absorbed layer 21's clearance and absorbed, dissolves after water-soluble fiber 24 in fine hair thick liquid layer 23 and the urine contact, can form the passageway and make the urine can get into fine hair thick liquid layer 23 inside fast to improve the absorption rate of fine hair thick liquid layer 23 to the urine.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a panty-shape diapers core of high water-absorbing which characterized in that:

comprises a non-woven fabric layer (1), an absorption layer and a water-repellent bottom film (3);

the absorption layer comprises an SAP absorption layer (21), a mixed fiber layer (22) and a fluff pulp layer (23),

the SAP absorption layer (21) is porous, the mixed fiber layer (22) is made by mixing low-melting-point fibers and high-melting-point fibers, and the mixed fiber layer (22) is arranged on two sides of the SAP absorption layer (21);

the fluff pulp layer (23) is connected with the mixed fiber layer (22), and water-soluble fibers (24) are mixed in the fluff pulp layer (23);

the non-woven fabric layer (1) and the water-repellent bottom membrane (3) are respectively arranged on two surfaces of the absorption layer.

2. The diaper core with high water absorption of claim 1, wherein: the mixed fiber layer (22) is composed of PP fiber and PLA fiber.

3. The diaper core with high water absorption of claim 1, wherein: the non-woven fabric layer (1) is a super-transparent PLA hot air non-woven fabric.

4. The diaper core with high water absorption of claim 1, wherein: the water-repellent bottom film (3) is a PP film.

5. The diaper core with high water absorption of claim 1, wherein: the water-soluble fiber (24) is alginate fiber.

6. A method of manufacturing a highly absorbent diaper core according to any of claims 1-5, said method comprising the steps of:

(1) preparing porous SAP particles using a CO2 supercritical foaming process;

(2) providing mixed fiber layers (22) on both sides of the SAP absorption layer (21);

(3) connecting a fluff pulp layer (23) mixed with water-soluble fibers (24) to the mixed fiber layer (22);

(4) heating the material obtained in the step for 10-15 s at a temperature not lower than the melting point of the low-melting-point fibers in the mixed fiber layer (22) and not higher than the melting point of the high-melting-point fibers in the mixed fiber layer (22);

(5) the materials are cut into proper shapes, and a non-woven fabric layer (1) and a water-repellent bottom film (3) are respectively stuck on two sides of the materials.

7. The diaper core with high water absorption and the preparation method thereof as claimed in claim 6, wherein: in the step (5), the non-woven fabric layer (1) and the water-repellent bottom film (3) are bonded through ultrasonic bonding.

8. The diaper core with high water absorption and the preparation method thereof according to claim 41, wherein the diaper core with high water absorption is characterized in that: the low-melting-point fibers in the step (4) account for 10-20% of the total mass fraction of the mixed fiber layer (22).