KR20030087410A - Absorbent core for diaper and its producing method - Google Patents

Abstract

PURPOSE: Provided are a core for paper diaper having reinforced form stability and anti-aggregation function, which is positioned at the center of the diaper so as to absorb an excrement, and a method for producing the same. CONSTITUTION: The diaper comprises a core having predetermined thickness and streamline shape including rectangle, which comprises a super absorbent polymer and a cotton pulp in order to absorb a moisture; a non-woven fabric contacting with skin, which is a surface of the core; and a back sheet which accepts the core and the non-woven fabric and forms a form of entire diaper, wherein the core is produced by heat-treating a composition of bi-component synthetic fiber(22) or cellulose fiber(21) and super absorbent polymer(SAP)(20).

Description

Absorbent core for diaper and its producing method with enhanced shape stability and aggregation prevention function

The present invention relates to a paper diaper core and a method of manufacturing the same for enhanced shape stability and prevention of aggregation, and more particularly, pulp and superabsorbent polymer in paper diapers worn to treat large and small urine. Consists of a shape stability and agglomeration prevention function of the core interposed in the center of the paper diaper to absorb it when excreted.

In general, diapers are largely divided into fabric diapers and paper diapers by the material is made of articles that are worn to treat the large, urine of infants, infants.

The fabric diapers are formed to have a certain width and length using mostly cotton material, and can be used repeatedly through the washing process in case of contamination due to urine and urine. It increases housework and is difficult to store and handle.

In contrast, paper diapers consist of a core made of absorbent resin and pulp with excellent water absorption, and a back sheet for fixing the core and wearing the diaper. Along with the disadvantages, it has the advantage of reducing the housework labor of handling and housewives.

Among the diapers, paper diapers are gradually increasing as industrial development and housewives increase their participation in social activities.

The paper diaper 1 has a core 13 formed in a streamlined shape including a rectangle having a predetermined thickness by mixing the superabsorbent resin 11 and the planar pulp 12 to absorb moisture as shown in FIG. 1, The surface of the core 13 is composed of a nonwoven fabric in contact with the skin and a backsheet 14 which accommodates the core and the nonwoven fabric to form the entire diaper.

The paper diaper core 13 and the diaper 1 as described above are formed through a schematic process as shown in FIG. 2, and briefly describing each process,

First, the crushing process of pulverizing through a hammer mill to unwind the pulp wound in roll form to form a pulp having a certain specification,

A core forming process of sucking the crushed pulp through a core forming drum and adding a super absorbent resin to form a core shape;

Pressure-sensitive adhesive spraying step of injecting the pressure-sensitive adhesive to the core of the superabsorbent polymer and pulp, Non-woven fabric input process of fixing the nonwoven fabric to prevent the outflow of the shape-retaining and superabsorbent polymer to the core through the pressure-sensitive adhesive,

Backsheet input process through the backsheet forming the shape of the entire paper diaper by placing the core formed as described above, rubber band insertion process for mounting a rubber band to make the core and the backsheet in close contact with the body when wearing the paper diaper; Waist band inserting process that attaches a band to tighten the waist to prevent separation when wearing paper diapers.

It is manufactured through a tape-type feeding process to enable the adhesion of the waistband, a cutting process of cutting the manufactured paper diaper into a final form, and an inspection and packaging process.

Paper diaper (1) manufactured as described above is worn on infants, infants, and handles urine and urine. In the case of feces, the paper diaper is replaced at the same time as excretion, but in the case of urine, at least three times of excretion Replacing the paper diaper afterwards is a common practice.

However, if the paper diaper is replaced after several times of excretion,

In two or more times, the pulp and superabsorbent resin are deformed in the initial form due to the water absorbed by the core, or agglomeration phenomenon occurs in which the pulp in the core moves to one side, so that stable water absorption is impossible, and the excreted urine is leaked Of course, a lot of contact with the wearer's skin had a problem such as damaging the soft skin.

Shape deformation and agglomeration of the core 13 absorbing moisture as described above is caused by the fastening between the pulp and the superabsorbent resin is not made, the injection amount and the spraying area of the pressure-sensitive adhesive applied to the nonwoven fabric fixing to compensate for the phenomenon We solved by increasing.

However, since the application of the pressure-sensitive adhesive is applied only to the core surface and not to the inner side of the core, the fastening force between the nonwoven fabric and the core surface is increased, but it does not show any effect inside the core.

In addition, to increase the injection volume of the adhesive and to emboss the core by the strong pressure to prevent the deformation and agglomeration of the core, it is intended to increase the fastening force between the superabsorbent resin and the pulp, but it causes the core hardening according to the increased pressure It causes a problem that the absorbency and fit is significantly reduced, it did not achieve a very effective effect on the deformation and aggregation of the core described above.

In the present invention, while maintaining the softness of the core was created to prevent the shape deformation and agglomeration phenomenon due to water absorption, by mixing a synthetic fiber composed of two or more chemical fibers in the superabsorbent resin, these mixtures at a constant temperature and time Heat-treatment in the inside increases the fastening force between the superabsorbent resin and the synthetic fiber, and prevents shape deformation and agglomeration when absorbing moisture, thereby improving quality and increasing the feeling of wearing.

1 is a plan view and a cross-sectional view showing a common paper diaper core,

Figure 2 is a simplified block diagram showing a paper diaper core and paper diaper manufacturing process applied to the prior art,

Figure 3 is a cross-sectional view showing a paper diaper core reinforced shape stability and bunching function applied to the present invention,

Figure 4 is a cross-sectional view showing a second embodiment of the present invention, the paper diaper core reinforced shape stability and bunching,

Figure 5 is a cross-sectional view showing a third embodiment of the present invention the core for paper diaper reinforced shape stability and aggregation function,

Figure 6 is a simplified block diagram showing a paper diaper core and paper diaper manufacturing process of the present inventors enhanced shape stability and aggregation.

* Description of the symbols used in the main parts of the drawings *

2; paper diaper core

20; super absorbent polymer

21; cellulose fiber

22; Bi-component synthetic fiber

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a cross-sectional view showing a paper diaper core reinforced shape stability and bunching prevention function to which the present invention is applied, Figure 4 shows a second embodiment of the paper diaper core reinforced with the shape stability and aggregation prevention function of the present inventors One cross-sectional view, Figure 5 is a cross-sectional view showing a third embodiment of the present inventors core shape stability and bundling prevention reinforced paper diaper, Figure 6 is a morphology stability and bundling protection reinforced the present invention The paper diaper manufacturing process will be described together as a block diagram showing the process.

In order to achieve the above object, the present invention provides a paper diaper core with enhanced shape stability and agglomeration prevention function, replacing fluff pulp, and using bi-component synthetic fiber and cellulose fiber. Bonding these synthetic fibers with superabsorbent polymer (SAP) by heat treatment over a certain temperature and time period prevents the separation of superabsorbent resins and synthetic fibers during moisture absorption. The shape retention and agglomeration prevention properties of 2) can be improved, and the moisture absorption and softness are doubled by the bulkyness through the bi-component synthetic fiber.

The paper diaper core 2 and the paper diaper are produced through the manufacturing process as shown in FIG.

First, a fiber supply process in which bi-component synthetic fibers and cellulose fibers, which are synthetic fibers, are supplied by replacing the planar pulp by a fiber supply device;

A core forming process of sucking the supplied synthetic fibers through a core forming drum and adding a super absorbent polymer to have a core shape;

A heat treatment process for curing a combination of the synthetic fiber and the super absorbent polymer and heating the oven for a predetermined time through an oven maintaining a temperature in a predetermined range for imparting a fastening force by mutual bonding action;

Pressure-sensitive adhesive spraying step of injecting pressure-sensitive adhesive into the core mixed with each synthetic fiber and super-absorbent resin; Non-woven fabric injection process of fixing nonwoven fabric to prevent shape oil and superabsorbent polymer from spilling into the core;

Back sheet feeding process through the back sheet to form the shape of the entire paper diaper by placing the core formed as described above,

Rubber band insertion process, which is equipped with a rubber band to keep the core and the backsheet in close contact with the body when wearing the paper base ear.

Waistband input process that prevents detachment by tightening waist when wearing paper diaper, tape type input process that enables waistband adhesion, cutting process of cutting manufactured paper diaper to final form, inspection and packing process Manufactured through.

Paper diaper manufactured by the above series of processes can be formed through the following examples according to various synthetic fibers mixed with the superabsorbent resin to form the core for water absorption.

<Example 1>

The paper diaper core 2 is a mixture of the superabsorbent resin 20 and the cellulose fiber 21. After mixing the superabsorbent resin 40 wt% and the cellulose fiber 60 wt%, a heating temperature condition of 140 ° C. is formed. It is manufactured by heat treatment for 3.33 seconds in one oven.

<Example 2>

The paper diaper core 2 is composed of a super absorbent polymer 20 and a bi-component synthetic fiber 22, by mixing 40% by weight of the superabsorbent resin and 60% by weight of Bi-component synthetic fiber, 120-160 It is manufactured by heat treatment for 3.33 seconds in an oven having a heating condition of ℃.

The bi-component synthetic fiber 22 is also referred to as ES (ESsntric) fiber, 'P.E + PP' or 'P.E + PET' is a synthetic fiber mixed with two components such as 'P.E' 'Is easily dissolved in heat and acts as a bond to increase the fastening force of superabsorbent resin and synthetic resin, and the remaining PP or PET mainly focuses on low temperature heat treatment to perform strength oil localization.

<Example 3>

The paper diaper core 2 is a mixture of all of the bi-component synthetic fibers 22 including the cellulose fiber 21 in the super absorbent resin 20, 40% by weight of the superabsorbent resin, 30% by weight of cellulose fiber, It is formed as 30% by weight of bi-component synthetic fiber, it is produced through a heat treatment for 3.33 seconds in the oven to form a heating condition of 120-160 ℃.

The core 2 of the paper diaper manufactured by each embodiment as described above,

Cellulose fibers (21) and Bi-component synthetic fibers (22) have improved surface bulkiness compared to conventional planar pulp, which significantly increases water absorption during large and urine excretion of infants and young children. In addition to preventing the outflow of water, as well as to improve the feeling of wear due to the softness of the lowered synthetic fibers.

In addition, the synthetic fibers mixed in the core by the heat treatment process is melted and bonded with the superabsorbent resin, it is possible to prevent the shape deformation or agglomeration of the core due to the water absorption.

As described above, the present invention provides a paper diaper core with enhanced shape stability and agglomeration prevention function, and a method of manufacturing the same for replacing a paper pulp vulnerable to moisture to form a synthetic fiber and a super absorbent resin, and heat-treating the mixture to form a synthetic fiber and By increasing the fastening force of the super absorbent polymer, it is a useful invention that can increase the customer reliability according to the improvement of quality by preventing the shape deformation and agglomeration of the core when absorbing moisture due to excretion.

Claims (4)

In order to absorb moisture, the superabsorbent resin and the cotton pulp are mixed to have a predetermined thickness and have a streamline shape including a rectangle, and a nonwoven fabric contacting the skin with the core surface, and a core and a nonwoven fabric to accommodate the shape of the entire diaper. In constructing a conventional paper diaper composed of a back sheet; The paper diaper core 2, Form stability and agglomeration prevention function are characterized in that the bi-component synthetic fiber (22) or cellulose fiber (21) and superabsorbent polymer (SAP) combinations are manufactured through a heat treatment process. Method for producing a reinforced paper diaper core. The paper diaper core 2, After mixing 40% by weight of superabsorbent resin and 60% by weight of cellulose fiber, it is formed through an heat treatment process for 3.33 seconds in an oven having a heating temperature condition of 140 ° C., thereby enhancing morphological stability and agglomeration prevention function. Paper diaper core. The method of claim 2 The paper diaper core 2, Form stability and agglomeration prevention function, characterized in that formed by heat treatment for 3.33 seconds in an oven formed by heating 120-160 ℃ by mixing 40% by weight of superabsorbent resin and 60% by weight of Bi-component synthetic fiber Reinforced paper diaper core. The method of claim 2; The paper diaper core 2, Formed as 40% by weight of superabsorbent paper, 30% by weight of cellulose fiber, 30% by weight of Bi-component synthetic fiber, characterized in that formed by heat treatment for 3.33 seconds in the oven formed the heating conditions of 120-160 ℃ Core for paper diapers with increased stability and prevention of bunching.