KR20230092800A - Method for making a diaper with conductive pattern - Google Patents

Abstract

The present invention relates to a method of manufacturing a diaper with a conductive pattern formed thereon. An absorbent part is manufactured by attaching a top core wrap of core pulp of a set shape mixed with pulp and super absorbent polyme (SAP), and attaching a bottom core wrap to the lower surface of the core pulp. A top part is manufactured by placing side girders on both sides facing the top of a top sheet and pressing the same. A bottom part is manufactured by adhering a pattern section made of multiple conductive lines made of conductive ink to the upper surface of a backsheet nonwoven fabric. A laminate is manufactured by stacking the absorbent part on the bottom part and stacking the top part on the absorbent part. A diaper pad is manufactured by transporting the laminate onto a belt of a release conveyor and pressing the same on a pressing roller installed on the belt of the release conveyor.

Description

Method for making a diaper with conductive pattern {Method for making a diaper with conductive pattern}

The present invention relates to a method for manufacturing a diaper formed with a conductive pattern, and more particularly, to a method for manufacturing a diaper formed with a conductive pattern for detecting defecation and urine using a conductive ink pattern.

Diapers are absorbent articles used by newborn babies, infants, the elderly, physically handicapped, etc., and are mainly used for disposable purposes.

Such a disposable diaper is used as an auxiliary tool for excretion or as a sanitary product for nursing by holding and absorbing the excretion without leaking it for those who have difficulty excreting on their own, such as newborn babies, the elderly, the elderly, and the physically handicapped. .

Currently, a smart diaper that detects defecation or urine through a conductive ink pattern is being developed by installing a conductive ink pattern on the diaper.

However, since the material of the part where the conductive ink pattern is formed in the smart diaper is very thin, the conductive ink is discharged to the outside by compression by the roller during the manufacturing process, and the conductive ink pattern is disconnected to prevent current from flowing. There is a problem that defective diapers produced due to the discharged ink occur.

Domestic Patent Publication No. 10-2009-0006353 (published date, 2009.01.15) Japanese Unexamined Patent Publication No. 10-2000-024023 (published date, 2000.01.25)

An object of the present invention is to provide a method for manufacturing a diaper having a conductive pattern to prevent disconnection of the conductive ink pattern and diaper defects.

Method for manufacturing a diaper with a conductive pattern according to an embodiment of the present invention for solving the above problems is to attach a top core wrap of a set-shaped core pulp in which pulp and SAP (Super Absorbent Polymer) are mixed, and to attach the lower part of the core pulp. The process of manufacturing the absorbent part by attaching the bottom core wrap to the surface; A process of manufacturing a top part by placing side girders on both sides opposite to the upper surface of the top sheet and pressing them; A process of manufacturing a bottom part by adhering a pattern part composed of a plurality of conductive lines made of conductive ink to the upper surface of the back sheet nonwoven fabric; forming a laminate by laminating the absorbent part on the bottom part and stacking a top part on the absorbent part; and transferring the laminate onto a belt of a releasable conveyor and pressurizing the stacked body onto a compression roller installed on the belt of the releasable conveyor to manufacture a diaper pad.

The entire belt of the releasable conveyor is made of at least one of saturated polyester, silicone, rubber, and foamed plastic, which is a releasable material having releasability from the back sheet nonwoven fabric, and the bag after being compressed by the compression roller. It is possible to prevent the sheet nonwoven fabric from adhering to the belt.

An upper surface of the belt of the releasable conveyor contacting the back sheet nonwoven fabric may be made of a releasable material.

A plurality of release films made of the release material are stacked on an upper surface of the belt of the release conveyor, and each of the release films may be removed from the lower release film through a peeling operation.

The method of manufacturing a diaper having a conductive pattern according to an embodiment of the present invention includes photographing the fabricated diaper pad using a first photographing device; photographing an upper surface of the belt transporting the diaper pad using a second photographing device; and performing a warning operation when the conductive ink is found in the captured images captured by the first and second photographing devices.

The present invention makes it possible to prevent disconnection of conductive ink patterns and defective diapers.

1 is a view showing a diaper on which a conductive pattern is formed according to an embodiment of the present invention.
2 is a cross-sectional view showing a schematic configuration of a diaper on which a conductive pattern is formed according to an embodiment of the present invention.
3 is a cross-sectional view showing a specific configuration of a diaper on which a conductive pattern is formed according to an embodiment of the present invention.
4 is a diagram showing a pretreatment process of a method of manufacturing a diaper having a conductive pattern according to an embodiment of the present invention.
5 and 6 are diagrams showing a belt configuration of a release conveyor according to a first embodiment of the present invention.
7 is a view showing a belt configuration of a release type conveyor according to a first embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, each step described can be performed regardless of the listed order, except for the case where it must be performed in the listed order due to a special causal relationship.

In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a view showing a diaper on which a conductive pattern is formed according to an embodiment of the present invention. Referring to FIG. 1 , a diaper 100 having a conductive pattern according to an embodiment of the present invention has a pattern unit 0 through which electricity is communicated, and a monitoring terminal that supplies an electrical signal to the pattern unit 10 to detect urine. can include

The pattern unit 140 may be a conductive pattern composed of four conductive lines 10a formed of conductive ink as shown in FIG. 1 (a), and two conductive lines formed of conductive ink as shown in FIG. 1 (b) ( 10a) may be a conductive pattern. Of course, the number of conductive ink lines 10a constituting the pattern unit 10 may be three or more.

The pattern unit 140 is installed in a region of the diaper 100 that receives user's urine or defecation.

The monitoring terminal may detect an offset change of an electrical signal provided through each conductive line 141 of the pattern unit 10 and detect urine or defecation using the offset change. For example, the monitoring terminal may detect the presence or absence of urine or defecation by measuring the impedance of each conductive line 141 and determining the difference in impedance of each conductive line 141 .

2 is a cross-sectional view showing a schematic configuration of a diaper on which a conductive pattern is formed according to an embodiment of the present invention. Referring to FIG. 2 , the diaper 100 is positioned between a top part 110 in contact with the user's body and between the top part 110 and the bottom part 130, such as urine or water in the top part 110. It may include an absorbent part 110 that absorbs the liquid of the absorbent part 110 and a bottom part 130 on which a conductive pattern for detecting the liquid absorbed by the absorbent part 110 is located and whose outer surface is exposed to the outside when the diaper is worn.

The diaper 100 according to the embodiment of the present invention shown in FIG. 2 will be described in more detail with reference to FIG. 3 . 3 is a cross-sectional view showing a specific configuration of a diaper on which a conductive pattern is formed according to an embodiment of the present invention.

Referring to FIG. 3 , the top part 110 of the diaper 100 on which the conductive pattern is formed according to the embodiment of the present invention may include a top sheet 111 and side girders 112. . The top sheet 111 is a part whose upper surface comes into contact with the skin when the diaper 100 is worn, and is made of a material such as non-woven fabric that is pleasant to the touch and does not irritate the skin. The side girders 112 are attached to both sides of the top sheet 111 and protrude outward. The side girders 112 are also referred to as 'wings' of the diaper.

The absorbent part 120 may include a core pulp 121 , a top core wrap 122 and a bottom core wrap 123 . The core pulp 121 is manufactured by mixing SAP (Super Absorbent Polyme), which is a water absorbing material, and pulp (or fiber). Here, SAP is composed of a three-dimensional network structure, and when it comes into contact with water, it swells like a snow white flag in the form of a gel.

In order to prevent SAP from leaving while maintaining the shape of the core pulp 121, the top core wrap 122 is located on the upper surface of the core pulp 121, and the bottom core wrap 122 is on the lower surface of the core pulp 110. Located.

The bottom part 130 may include a back sheet nonwoven fabric 131 and a back sheet film 132 . The backsheet film 132 is positioned below the absorbent part 120 to determine whether liquid absorbed by the absorbent part 120 (eg, urine, defecation, etc.) exists. The back sheet film 132 may include a film layer 20 and a pattern portion 10 formed on the film layer 20 .

The film layer 20 is longer than the horizontal length of the absorbent part 120 (ie, in the width direction of the diaper) in order to prevent water (urine, etc.) absorbed in the core pulp 121 from flowing out, and the top sheet ( 111) has a shorter length. The pattern part 10 includes a plurality of conductive lines 10a formed on the film layer 20 , and the plurality of conductive lines 10a are located directly below the absorption part 120 . Each conductive line 10a generates an electrical signal in response to water (urine, bowel movement, etc.) and provides the generated electrical signal to a monitoring terminal attached to the diaper.

The backsheet nonwoven fabric 150 is waterproofed so that water (urine) absorbed in the core pulp 110 along with the film layer 20 does not flow out through the backsheet nonwoven fabric 150. The material of the back sheet nonwoven fabric 150 is a nonwoven fabric.

4 is a view showing a method of manufacturing a diaper having a conductive pattern according to an embodiment of the present invention. Referring to FIG. 4, first, a core pulp 121 is produced (S11). In the manufacturing process of the core pulp 121, pulp (or fiber) supplied from a pulp feeder (not shown) is molded into a set shape, and then SAP is added to the molded pulp and mixed. Then, the core pulp 121 is produced by pressing the mixed mixture of SAP and pulp through a hot melt equipment, applying an adhesive to the outer surface, and then cutting to a set length.

Then, the top core wrap 122 is attached to the upper surface of the core pulp 121 made in this way, and the bottom core wrap 123 is attached to the lower surface of the core pulp 121 to manufacture the absorbent part 120 (S12 ).

Separately from the fabrication of the absorbent part 120, the top part 110 is fabricated (S20). In the manufacturing process of the top part 110, adhesive is applied to the upper surface of the top sheet 111 using hot melt equipment, and then side girders 112 are placed on opposite sides of the upper surface of the top sheet 111 to which the adhesive is applied. Place and compress to produce the top part 110.

Separately from the production of the absorbent part 120 and the production of the top part 110, the bottom part 130 is manufactured (S30). In the manufacturing process of the bottom part 130, an adhesive is applied to the upper surface of the back sheet nonwoven fabric 131 using hot melt equipment, and the back sheet film on which the pattern portion 10 is formed is formed on the upper surface of the back sheet nonwoven fabric 131 to which the adhesive is applied. The bottom part 130 to which 132 is adhered is produced.

Here, the manufacturing process of the above-described top part 110, the manufacturing process of the absorbent part 120, and the manufacturing process of the bottom part 130 follow known techniques. In addition, the top part 110 and the absorbent part 120 are formed using other known techniques other than the manufacturing process of the top part 110, the manufacturing process of the absorbent part 120, and the manufacturing process of the bottom part 130 described above. And the bottom part 130 can be manufactured.

In order to combine the top part 110, the absorbent part 120, and the bottom part 130 manufactured as described above into one, the absorbent part 120 is laminated on the bottom part 130, and the absorbent part 120 is placed on top of the absorbent part 120. The top part 110 is laminated on (S30). At this time, the pattern unit 10 is positioned so as to overlap the core pulp 121 .

And the laminated body in which the top part 110, the absorption part 120, and the bottom part 130 are stacked is transferred onto the belt of the release conveyor 200, and the compression roller 300 installed on the belt of the release conveyor 200 A diaper pad is produced by being compressed and passed through (S40).

The processes of S11 to S40 described above correspond to the pretreatment process, and then, in the posttreatment process, a cutting process, a folding process, an end cutting process, a productization process, and a packaging process are performed.

A monitoring terminal is installed, both ends of the diaper pad are banded for wearing, and processes such as product packaging are performed.

Meanwhile, in the process of S40, since the film layer 132 and the back sheet nonwoven fabric 131 are very thin, if the adsorption between the back sheet nonwoven fabric 131 and the belt of the release conveyor 200 is good, the conductive line when compressed by the compression roller 300 There are problems in that the ink of (10a) sticks to the belt of the release conveyor 200 and the conductive line 10a is disconnected. If the ink gets on the belt, the ink on the belt gets on other diapers, causing a problem of increasing the defective rate, and the disconnection of the conductive line 10a also causes a problem of increasing the defective rate.

In order to solve this problem, the present invention uses a material having releasability with nonwoven fabrics such as saturated polyester, silicone, rubber, and foamed plastic (hereinafter referred to as 'releasable material').

As a first embodiment to solve the problem, the present invention, as shown in FIGS. 5 and 6, the belt 220 of the release conveyor 200 is a release material, that is, the back sheet nonwoven fabric 131 and adhesion (absorption) It is composed of almost no materials (used in combination with the materials below).

That is, referring to FIG. 5 (b) in which a portion (A) of the belt portion of the release conveyor 200 in FIG. 5 (a) is enlarged, the belt 220 installed on the top of the transfer plate 210 is made of material

Alternatively, referring to FIG. 5(c) in which a part (A) of the belt portion of the releasable conveyor 200 is enlarged in (a) of FIG. ) can be used only on the upper surface 220b. In (c) of FIG. 5, 220a indicates a portion of the belt 220 made of a material other than a releasable material.

As a second embodiment to solve the problem, the present invention may install a release film unit 230 of a release material on the belt 220 of the release conveyor 200 as shown in FIG. 7 . Referring to FIG. 7 (b) in which a portion (A) of the belt portion of the release conveyor 200 is enlarged in (a) of FIG. 7, the release film unit 230 includes a plurality of release films 231 to 34). Here, the number of the release film is shown as four, but may be more than this.

The first release film 231 is located on the upper surface of the belt 220, the second release film 232 is located on the upper surface of the first release film 231, and the third release film 232 is located on the upper surface of the second release film 232. A release film 233 is positioned, and a fourth release film 234 is positioned on the upper surface of the third release film 233 .

Each of the release films 231 to 234 of the release film unit 230 is stacked one by one, and is manufactured to be peelable one by one. That is, each of the release films 231 to 234 can be removed from the lower release film through a peeling operation by a person.

Therefore, if the ink of the conductive line 10a is smeared on the releasable film, the diaper can be produced immediately after peeling off a layer of the releasable film with the ink.

As described above, the belt 220 of the releasable conveyor 200 is composed of a material that has little adhesive strength with the back sheet nonwoven fabric 131, and if no pressure is applied after the pressure of the compression roller 300 is applied, the back sheet nonwoven fabric 131 ) and is easily separated (ie, adhesion is lost), preventing ink from being smeared due to breakage of the conductive line 10a.

Next, the diaper pad manufactured in step S40 is transferred to the next process through the release conveyor 200 for post-process processing, wherein at least one first photographing device (ie, camera) 400 is a compression roller ( 300), the fabricated diaper pad is photographed, and the photographed image is provided to a monitoring device (not shown) (S50).

In addition, at least one second photographing device (ie, camera) 500 is located at the rear end of the compression roller 300 to photograph and photograph the belt 220 or the release film unit 230 for transporting the fabricated diaper pad. An image is provided to a monitoring device (not shown) (S60).

Here, the role of the first photographing device 400 is to monitor whether there is a defective product, that is, a diaper pad with ink, and the role of the second photographing device 500 is to attach the belt 220 or the release film unit 230. This is to monitor whether ink is present.

The monitoring device analyzes the captured image captured by the first photographing device 400 to monitor whether ink is smeared on the diaper pad. A monitoring operation of sending a warning message or displaying a warning on the screen is performed (S70). In addition, the monitoring device analyzes the photographed image taken by the second photographing device 500 to monitor whether ink is smeared on the belt 220 or the release film unit 230, and the belt 220 or the release film unit 230 If there is ink on the screen, an alarm sound (warning sound) is generated, a warning message is sent to the manager's mobile phone, or a monitoring operation is performed to display a warning on the screen (S70).

When the manager confirms a warning sound, warning message, or warning display, the manager processes the defective product and removes the ink on the belt 220 or removes one release film with ink on the release film unit 230 .

The technical features disclosed in each embodiment of the present invention are not limited to the corresponding embodiment, and unless incompatible with each other, the technical features disclosed in each embodiment may be merged and applied to other embodiments.

Therefore, in each embodiment, each technical feature is mainly described, but each technical feature may be merged and applied to each other unless incompatible with each other.

The present invention is not limited to the above-described embodiments and accompanying drawings, and various modifications and variations will be possible from the viewpoint of those skilled in the art to which the present invention belongs. Therefore, the scope of the present invention should be defined by not only the claims of this specification but also those equivalent to these claims.

100: smart diaper 110: top part
120: absorption part 130: bottom part
111: top sheet 112: side girder
121: core pulp 122: top core wrap
123: bottom core wrap 131: back sheet nonwoven fabric
132: back sheet film 10: pattern portion
20: film layer 10a: conductive line
200: release conveyor 210: transfer plate
220: belt 230: release film unit
231 to 234: release film

Claims (5)

Attaching a top core wrap of a set-shaped core pulp in which pulp and SAP (Super Absorbent Polymer) are mixed, and attaching a bottom core wrap to a lower surface of the core pulp to manufacture an absorbent part;
A process of manufacturing a top part by placing side girders on both sides opposite to the upper surface of the top sheet and pressing them;
A process of manufacturing a bottom part by adhering a pattern part composed of a plurality of conductive lines made of conductive ink to the upper surface of the back sheet nonwoven fabric;
forming a laminate by laminating the absorbent part on the bottom part and stacking a top part on the absorbent part; and
Containing the process of manufacturing a diaper pad by transferring the laminate onto a belt of a releasable conveyor and pressing it against a compression roller installed on the belt of the releasable conveyor,
A method of manufacturing a diaper having a conductive pattern. According to claim 1,
The belt of the releasable conveyor,
The entire belt is made of at least one material of saturated polyester, silicone, rubber, and foamed plastic, which is a release material having releasability with the backsheet nonwoven fabric, and after being compressed by the compression roller, the backsheet nonwoven fabric is attached to the belt. not sticking together,
A method of manufacturing a diaper having a conductive pattern. According to claim 1,
The belt of the releasable conveyor,
The upper surface in contact with the back sheet nonwoven fabric is made of a release material,
A method of manufacturing a diaper having a conductive pattern. According to claim 1,
The belt of the releasable conveyor,
A plurality of release films made of the release material are laminated on the upper surface, and each of the release films can be removed from the lower release film through a peeling operation.
A method of manufacturing a diaper having a conductive pattern. According to any one of claims 1 to 4,
photographing the fabricated diaper pad using a first photographing device;
photographing an upper surface of the belt transporting the diaper pad using a second photographing device; and
Further comprising the step of performing a warning operation when the conductive ink is found in the photographed images captured by the first photographing device and the second photographing device.
A method of manufacturing a diaper having a conductive pattern.

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