KR20100119831A - Elastic tie band for disposable diaper - Google Patents

Abstract

PURPOSE: An elastic tying band of a disposable diaper is provided, which is used in order to prevent a diaper from falling when a baby diaper or an adult diaper is being worn. CONSTITUTION: An elastic tying band of a disposable diaper comprises: an elastic melt blown non-woven fabric single material band paper; an elastic melt blown non-woven fabric single material band which is manufactured by cutting the elastic melt blown non-woven fabric single material band paper in the size of a tying band; a diaper assembly region(23) arranged in the elastic melt blown non-woven fabric single material band; a hook tape attaching region(22) arranged in the other side of the elastic melt blown non-woven fabric single material band; and a hook tape(25) adhered to the hook tape attaching region.

Description

Elastic Tie Bands for Disposable Diapers {ELASTIC TIE BAND FOR DISPOSABLE DIAPER}

This invention relates to elastic tiebands for disposable diapers. More specifically, it is an elastic tie band attached to the diaper to attach the disposable adult diaper or disposable infant diaper to the body.

Reference is made to FIG. 6. Disposable diapers include elongated diaper plates (111) surrounded by lining and outer fabric, waist wraps (112, 113) following one head and the other head of the diaper plate, and laces (114, 114) attached to one waist and the other waist edge of the diaper. , Manufactured by absorber 116 filled inside the lining to absorb the moisture delivered to the diaper plate, lining 117 to contact the body to transfer the moisture to the inner absorbent, outer fabric to cover the outside of the absorber so that the moisture retained by the absorber does not leak do.

To use disposable diapers, attach the waist wraps on both sides of the diaper to the front and back of the body, and pull one waist wrap over the other. The disposable diaper has a tie band 121 attached to both sides of one waist wrap to pull the waist wrap, and a nonwoven loop sheet 126, which is an element of the fiber bonding system, is attached to the skin of the other waist wrap 113. .

Looking at the action of the tie band tie band 121 is an elastic band. One end region 123 of the elastic tie band is a portion for attaching the tie band to the outer shell of the waist wrap 112. The diaper manufacturer manufactures the diaper plate and attaches one end region 123 of the separately produced tie band to the diaper plate. The most commonly used technique as an attachment method is adhesion by an ultrasonic bonder. The other end region of the tieband is an area for attaching hook tape 125, which is one component of the fiber bonding system. The tie band 121 is attached to the loop seat provided on the other waist wrap 113, the hook tape 125 attached to one end region 123 on both sides of one waist wrap 112 and the other end wrap region (112). By applying diapers to a person's body.

A widely used adhesive system of tieband 121 is the well known hook and loop of Velcro tape. Velcro hooks and loops are widely used as garment bonding systems. The most common hooks are flexible monofilaments that are bent into hooks and densely collected on the hook tape. The other shape of the hook has a “T” shape with the ends of the monofilament bifurcated on both sides. The velcro loop uses a loop of a nonwoven web. Most commonly, a spunbond nonwoven fabric is processed to velcro the fibers of the nonwoven web. As a loop of loop, usually a spunbonded nonwoven web is applied to the nonwoven fabric for use as a velcro loop.

One of the means for processing a nonwoven web to use the spunbond nonwoven fabric as a velcro loop is to heat-squeeze the spunbond nonwoven web in a polka dot pattern on a calendar roll. The polka dot pattern is engraved in the calender roll, and the first plane which is heated and pressurized by the roll and the second plane which is not heat pressurized in the pattern part of the calender roll are partitioned by the process of the calender roll. The first plane presses the fibers of the nonwoven web to form the basis of the Velcro loops. The second plane is prominent than the first plane and is in easy contact with the hooks of the velcro hooks and is the portion where the fiber loop layer of the spunbond nonwoven web is coupled to the velcro hooks. Processing techniques for partitioning the nonwoven web into a first plane and a second plane are described in detail in Korean Patent Publication No. 10-2004-0028564.

Another means for processing nonwoven webs for using spunbond nonwovens as velcro loops is to provide a loop protrusion on a spunbond nonwoven fabric and is provided in Korean Patent Publication No. 10-0709966. The Velcro loop system installed on the nonwoven fabric by the loop protrusion is a loop protrusion projected on the surface of the nonwoven fabric to be bonded to the adhesive hook, a fiber density of the loop protrusion having a lower density than the bottom of the nonwoven fabric, and a loop protrusion formed to correspond to the preliminary of the adhesive hook. It consists of the joining surface of. The loop protrusion on the surface of the nonwoven fabric heat-presses the back surface of the nonwoven fabric with a pin punch to protrude the loop protrusion onto the surface of the nonwoven fabric. The loop protrusion is a Velcro loop system in which a loop of the loop protrusion having a fiber density of 0.5 to 15 mm, a diameter of 0.1 to 7 mm, a height of 0.5 to 4 mm, and a fiber density lower than that of the nonwoven fabric is coupled to the Velcro hook.

The loop sheet of the adhesive system installed on the waist wrap 113 of the disposable diaper may be a nonwoven roof sheet having a first plane and a second plane cited above, or a nonwoven loop sheet formed by punching the loop protrusion to lower fiber density. have.

The elastic tie band 121 of the disposable diaper is generally sold in three kinds of products provided by patent technology. A feature of nonwoven tiebands is that they are made of a composite of a nonwoven fabric and an elastomeric polymer membrane. Tie-band products most commonly used on the market are products in which an elastic film is bonded between two layers of necking nonwoven fabrics. Reference is made to FIG. 7 in detail. Spun Bond nonwoven fabric 200 (GSM is gram per square meter) is shrinked (necked) from 3m wide (W1) to 1.5m wide (W2) to increase the weight to 45 GMS while simultaneously 3, in which the elastic polymer film is inserted into a sandwich by melt extruding or laminating the polyolefin-based polymer 203 with a stretchable elastic body of 45 GSM between two layers of necking nonwoven fabric 201 processed at a weight of 45 GSM and giving elastic elasticity. A layered elastic nonwoven composite 204 is produced. The manufactured three-layer elastic nonwoven composite 204 is a composite having elasticity in the necking direction and the elastic body inserted into the sandwich overlaps the elastic elasticity of the composite. The elastic composite 204 is cut long in the elastic direction to be used as the elastic tie band 121 of the disposable diaper. This tieband has excellent shrinkage characteristics that can be used several times, but the large processing cost of placing an elastic film between two nonwoven fabrics that are weighted by necking the nonwoven fabric is reflected in the price of the product, increasing buyer burden.

Another elastic tieband is listed in Korean Patent Laid-Open No. 10-2007-0094765, in which the fastening tape tab has a manufacturer side end and a user side end. The fastening tape tab comprises a substrate, ie a support layer and one or more patches of male fastening means, preferably hook means. The patch is disposed on a major surface at the user side end of the support layer. The patch has a proximal end facing the manufacturer side end of the fastening tape tab and a distal end facing the user side end of the fastening tape tab. An edge line is located at the proximal end of the patch and an edge line is located at the distal end of the patch. The fastening tape tab has a width and further includes a handle portion. This product is a nonwoven composite made by wrapping an elastic film between layers of nonwoven and wrinkling the nonwoven as a physical device that replaces the shrinkage system of the nonwoven.This product has a stretch ratio of the band when compared to a necked nonwoven composite having an elastic film disposed between the necking nonwoven. Low and product price is rather expensive.

The other disposable diaper tieband is to cut tough tape and use it as a tieband, which has a low tensile rate and no shrinkage recovery.

The present invention is used to prevent the diaper from falling down when the baby diaper and adult diaper are worn. It is attached to the left and right sides of the diaper waist and the manufacturing process is simplified to reduce energy consumption and waste of resources, thereby reducing the diaper one time. It is an object of the present invention to provide an elastic tieband for disposable diapers that can lower the supply price accordingly. This invention relates to elastic tiebands for disposable diapers made of elastic meltblown nonwovens, which are weights of elastic tiebands. The present invention seeks to provide a single material elastic tieband for disposable diapers using only the elasticity inherent in the nonwoven web without inserting an elastic film between the nonwoven layers. The present invention provides an elastic tie band for producing an elastic single band by overlapping with the weight of a tie band without cutting 20-60 g / m 2 meltblown nonwoven fabric and cutting the single band band to produce an elastic single band. I will. The present invention is to provide an elastic tie band for producing an embossed pattern elastic single band paper or an elastic plain pattern single material band paper by overlapping an elastic melt blown nonwoven fabric without necking in 1-4 layers of fabric. The present invention seeks to provide an elastic tieband made by placing a diaper assembly area on an elastic monomaterial band and attaching a hook tape.

The market condition of elastic nonwoven tie bands, which are a part of disposable diapers, is very important to provide superior elastic tie bands with extensibility and shrinkage elasticity without the need for expensive necking. Non-woven fabrics of non-woven fabric manufacturers in the market weighs less than the weight of tie band paper, so when you want to use a non-woven fabric as a band paper, it is necessary to overlap the non-woven fabric. Since the weight of band paper used in disposable diapers is generally in the range of 40-140 g / m 2, if the non-woven fabric with the weight of 20-60 g / m 2 is selected as the material of the tie band, the non-woven fabric is overlapped and bonded to the weight of the band paper in 2-4 layers. Will be used. However, in the present invention, if the weight of the elastic melt blown nonwoven fabric, which is a band paper nonwoven fabric, is used as the weight of the elastic tie band, a single nonwoven fabric can be used as a single band material without overlapping nonwoven fabrics.

In the investigation of the present invention, it was tested that the elastic melt-blown nonwoven fabric can be used as an elastic tie band suitable for one-time use of disposable diapers with only the elasticity of the nonwoven fabric even if the weight of the nonwoven fabric reaches the weight of the commercial band without the necking. The disposable diaper tieband of this invention is an elastic tieband made of only elastic meltblown nonwoven fabric.

An elastic nonwoven fabric that can be used in this invention is a meltblown nonwoven fabric having stretchability and shrinkage elasticity. Elastic meltblown nonwovens are nonwovens made of elastic polymers. The elastic melt blown nonwoven fabric which can be used as the tie band of the present invention includes a polyolefin elastomer prepared by polymerizing one or more olefin monomers including ethylene, propylene, butadiene and alpha olefin in an elastic polymer; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And meltblown nonwovens made of one or more polymers of polyester elastomers.

If the weight of a given elastic melt blown nonwoven fabric does not reach the weight of the elastic tie band, the elastic melt blown single material having a weight of 40-140 g / m2 by overlapping these nonwoven fabrics 11a, 11b, 11c as shown in FIG. A nonwoven band paper 12 or 13 is produced. The single material band 21 is produced by arranging and cutting the elastic single material band paper 12 or 13 so that the stretch direction of the band paper becomes the length direction of the band. When arranging and cutting the single material band 21, one region 23 and a hook tape attaching region 22 for assembling the elastic tie band 20 with the diaper are disposed in the single material band 21. The hook tape 25 is attached to the allocation area, and is attached to the band paper 12 or 13 in a single material band 21 arrangement and cut into the single material band 21. In contrast, depending on the process, the single band 12 or 13 is cut into a single band 21, and then the hook tape 25 is attached to the allocated area. The attachment of the hook tape 25 is carried out using an adhesive layer applied to the hook tape or by using an ultrasonic adhesive to use a low cost hook tape. As such, when the weight of the elastic melt blown nonwoven fabric does not reach the weight of the tie band 20, the elastic melt blown nonwoven fabric is overlapped and bonded to a plurality of elastic melt blown nonwoven fabrics, thereby providing necessary stretchability and shrinkage elasticity. The overlapping nonwoven fabric is heated and pressurized with the embossing pattern 15 to be bonded with a band paper or heat-pressed and pressurized in a solid state to be bonded.

This invention is demonstrated in more detail. Reference is made to FIG. 6. In the disposable diaper, one waist wrap 112 of one head of the diaper plate 117 and another waist wrap 113 of the other head are connected, and the tie band 20 connected to both sides of the waist wrap 112 of one head of the diaper. The hook tape 25 attached to the tie band is coupled to the loop seat 126 provided on the other waist wrap 113 of the other head to allow the diaper to be worn on the body.

1 to 6 an embodiment of this invention is cited. The elastic tie band of the disposable diaper of the present invention is an elastic melt blown nonwoven fabric made of an elastic melt blown nonwoven fabric which is made to be the weight of the tie band, or an elastic melt blown nonwoven fabric made of overlapping elastic melt blown nonwoven fabric to be the weight of the tie band. Elastic Melt-Brown Non-Woven Single Material Band 21, Tie Band, Made by Cutting the Material Band Paper 12 or 13, Elastic Melt-Blowed Non-Woven Single Material Band Paper 12 or 13 to the Size of Tie Band 20 On one side of the diaper assembly area 23 disposed on the elastic melt blown nonwoven monomaterial band, the other side of the elastic melt blown nonwoven monomaterial band 21 to attach 20 to both waist wrappers 12 of the nonwoven fabric. The hook tape attaching region 22 was arranged, and the hook tape 25 adhered to the hook tape attaching region of the elastic melt blown nonwoven fabric single material band 21. As described above, the present invention manufactures the elastic tie band of the disposable diaper by the single material band paper 12 or 13 and the single material band 21 and the elastic melt blown single material using only a single melt blown nonwoven material having elasticity. The necking process, which is a high-cost pretreatment of nonwoven fabrics, is omitted, which lowers the manufacturing cost of diaper elastic tie bands, saves data by eliminating the use of elastic films, and adjusts the tie bands with only nonwoven fabrics. Since the thickness of the tie band is thicker than the band, it is possible to provide an improved tie band.

The elastic melt-blown nonwoven fabric for manufacturing the elastic tie band 20 of the disposable diaper of the present invention is a polyolefin-based product made by polymerizing one or more olefinic monomers including ethylene, propylene, butadiene and alphaolefin in an elastic polymer. Restorers; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And meltblown nonwovens made of one or more polymers of polyester elastomers. This invention tie band is made of such an elastic polymer to be a non-woven fabric having an elongation and shrinkage elasticity that a general nonwoven fabric does not have, it is possible to manufacture a low-cost tie band of disposable diapers made of high quality with a single material called an elastic nonwoven fabric.

The elastic tie band 20 of the disposable diaper of the present invention may further include a handle area 24 for separating the hook tape from the roof sheet outside the hook tape attaching area of the other material band 21. When the tie band 20 is attached to the loop seat 126 of the waist wrap 13 by the adhesive force of the hook tape 25, the handle tape 24 is pulled up and the hook tape 25 is sequentially turned from one end part. Since the tie sheet 20 is separated from the roof sheet 126, the tie band 20 may be easily separated from the roof sheet.

The elastic tie band 20 of the disposable diaper of the present invention has a thin elastic melt blown nonwoven fabric when the weight of the elastic melt blown nonwoven fabric is thin as 20-60 g / m 2 and does not reach 40-140 g / m 2 of the band paper 12 or 13. (11a, 11b, 11c) 2-4 ply is bonded by heat and pressure to prepare a single band 12 or 13 weight of 40-140g / ㎡.

The elastic monomaterial band paper uses one elastic melt blown nonwoven fabric as the band paper if the weight of the nonwoven fabric meets the weight of the tie band. The single material band paper, which is a single nonwoven fabric, is cut into the elastic single material band 21 in a plain state, or is heated and pressurized in a heating embossing roll and a cooling roll set for elastic operation of the nonwoven fabric to impart an embossing pattern to the single band paper. The embossing pattern is a heat bond pattern and thus changes the elastic strength of the nonwoven web of the nonwoven fabric. This manipulation changes the stretch and shrink properties of the elastic band to bring product properties closer to the ideal needs. Specifically, when the embossed pattern area is 20% of the nonwoven plane, the elastic strength is increased by 5% and the stretch rate is reduced by 3%. The other single material band paper of this invention heats and presses two or more elastic melt-blown nonwoven fabrics 11a, 11b, ..., in the heating embossing roll 131 and the cooling roll 132 to overlap the nonwoven fabric of the heating roll 131. The embossed pattern monolayer band paper 12 is produced by adhering with the embossed pattern 15. Alternatively, the single material band paper is heated and pressurized by elastic heating on the melt-blown nonwoven fabric 2-4 ply in a heating roll and a cooling roll to produce a flat pattern single material band paper 13.

As described above, the present invention manufactures an elastic monomaterial band by using an elastic monomaterial band paper, and attaches a hook tape to the elastic monomaterial band paper to prepare an elastic tie band of a disposable diaper. Disposable diapers are prepared by attaching to one waist wrap area of the.

As described above, the present invention is used to prevent the diaper from falling down when the baby diaper and the adult diaper are worn. The diaper is attached to the left and right side of the diaper and reduces the energy consumption and waste of resources by simplifying the manufacturing process. Provided are elastic tiebands for disposable diapers that can lower the supply price to suit one-offs. The present invention provides a single material elastic tie band for disposable diapers using only elasticity unique to the nonwoven web without inserting an elastic film between the nonwoven layers, and is a single material band paper that is an elastic melt blown nonwoven fabric that weighs a tie band. Or weight 20-60g / ㎡ Melt-blown nonwoven fabric without overlapping with the weight of tie bands to produce elastic single band paper, cut single material band paper to produce elastic single band, elastic without neck Elastic ties made of melt-blown nonwoven fabric with 1-4 layers of fabric as it is, embossing pattern elastic single band paper or elastic flat pattern single band paper, diaper assembly area placed on elastic single band and attaching hook tape Provide a band.

Example 1

As an elastic melt blown nonwoven fabric, Polyolefin-type elastomer manufactured by polymerizing one or more olefinic monomers containing ethylene, propylene, butadiene, and alphaolefin in an elastic polymer; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefinic monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And meltblown nonwovens made of one or more polymers of polyester elastomers are used as the single material of the elastic tieband of disposable diapers.

Example 2

An elastic melt-blown nonwoven fabric was prepared at a weight of 120 g / m 2, and an embossed pattern was put to about 20% of the area of the nonwoven fabric in an embossing roll set to prepare a single embossed pattern elastic single material band paper.

Example 3

One layer of elastic meltblown nonwoven fabric of Example 1 having a weight of 45 g / m 2 was put between the diamond pattern heating press roll and the cooling roll to put an embossing pattern to prepare a single material band paper having an embossed pattern arranged and elastic and having a weight of 45 g / m 2.

Example 4

One layer of the elastic melt-blown nonwoven fabric of Example 1 having a weight of 60 g / m 2 was heated and pressed with a flat pattern roll between a diamond flat pattern heat press roll and a cooling roll to prepare an elastic single material band paper having a weight of 60 g / m 2.

Example 5

The elastic meltblown nonwoven fabric of Example 1 having a weight of 20 g / m 2 and the elastic meltblown nonwoven fabric of embodiment 1 having a weight of 25 g / m 2 were embossed by placing an embossing pattern between a diamond pattern heating press roll and a cooling roll to form an elastic An elastic monomaterial band paper having a weight of 45 g / m 2 was prepared.

Example 6

An elastic tie band for a diaper was manufactured as shown in Table 1 below using the elastic single material band paper of Examples 2 to 4.

Table 1, Specifications for Elastic Tie Bands

product no Example Weight (g / ㎡) Length
(mm) width
(mm) Width of diaper assembly area
(mm) Width of hook tape assembly area (mm) The width of the handle area
(mm) I 2 120 70 30 15 15 5 II 3 45 70 30 15 15 5 III 4 60 80 36 18 18 5 IV 5 45 60 25 15 15 4

Example 7

The test results of the diaper tie band of Example 5 are shown in Table 2.

Table 2. Table of Elastic Test of Tie Bands of Example 5

product no Primary 30% Elongation (g / f) Primary recovery force (g / f) Secondary recovery
Force (g / f) Stretching force (g / f) % Break Transverse stretching force (g / f) Test Methods I 1560 192 144 2712 600 5808 STM II 576 72 54 1017 225 2178 STM III 936 114 102 1596 336 3744 STM IV 540 81 59 931 257 2140 STM

Example 8

Table 3 shows the elasticity test results of commercially available tie band products.

Table 3. Commercial Necking Tie-Band Products A, B, C and D Weight 125g / m2

product no Primary 30% Elongation (g / f) Primary recovery force (g / f) Secondary recovery
Force (g / f) Stretching force (g / f) % Break Transverse stretching force (g / f) Test Methods A 503 63 45 938 215 2765 STM B 503 63 45 938 215 2765 STM C 615 73 53 1194 206 3308 STM D 416 56 42 635 268 2440 STM

Example 9

Comparative Example

The general test results of the nonwoven tiebands proved practical in Example 8 are Product A and Product B of Example 8. In the present invention, the product A, product B, similar to the product A of Example 8, the product II, product III, product IV cited in Example 7. The commercial product of Example 8 is a necking product with a band paper weight of 125 g / m 2, but the band paper weights of product II, product III, and product IV cited in Example 7 are product II-45 g / m 2 as shown in Example 6. , Product III-60 g / m 2, product IV -45 g / m 2. This demonstrates the economics, practicality and resource savings of the elastic tie band of the invention meltblown single material disposable diaper.

1 is a bonding process of the elastic melt blown nonwoven band paper of the present invention

Figure 2 is a bonding apparatus of this invention simple elastic melt blown nonwoven band paper

Figure 3 is an exploded view of this invention elastic tie band

Figure 4 is an assembly view of this invention elastic tie band

Figure 5 is a state in which the present invention the elastic tie band assembled to the diaper

Figure 6 is an assembled state of the conventional disposable diaper and tie band

7 is a manufacturing process diagram of a conventional tie band

Explanation of Major Symbols

11a, 11b, 11c are elastic melt blown nonwovens,

12 is embossed pattern elastic monomaterial band paper

13 is flat pattern elastic single band

20 is an elastic tie band

21 is elastic monomaterial band

22 is hook tape attachment area

23 is diaper assembly area

24 is the handle area

25 tape hooks

Claims (7)

One waist wrapper on one head of the disposable diaper followed by another waist wrapper on the other head, and the tie bands attached to each side of the waist wrapper on one head of the diaper have a loop of hooks attached to the tieband on the other waist wrapper on the other head. In bonding the sheet to the diaper, Elastic melt-blown nonwoven monolayer band paper, weighing tie bands, Elastic Melt Blown Nonwoven Single Material Bands manufactured by cutting the band paper into the size of tie band, One diaper assembly area disposed on an elastic melt blown nonwoven monolithic band to attach the tieband to one waist wrapper of the nonwoven fabric, Hook tape attachment area on the other side of the elastic melt blown nonwoven single band Hook tape bonded to the hook tape attachment area of the elastic melt blown nonwoven single band Tie band of disposable diaper in yellow. The method of claim 1, wherein the elastic melt blown nonwoven fabric is a polyolefin elastomer prepared by polymerizing at least one of the olefin monomers including ethylene, propylene, butadiene, alpha olefin in the elastic polymer; Polyurethane-based elastomers; An elastomer in which monomers having a polar group and the olefin monomers are copolymerized; Elastomers in which styrene and the olefin monomers are copolymerized; Nylon elastomers; And elastic tiebands of disposable diapers, which are meltblown nonwovens made of one or more polymers of polyester elastomers. The elastic tie band of a disposable diaper according to claim 1, further comprising a handle area for separating the hook tape from the roof sheet outside the hook tape attachment area disposed on the other side of the single material band. The method of claim 1, wherein a single elastic melt-blown nonwoven band paper is prepared by cutting the elastic melt-blown nonwoven band paper, which is the weight of the tie band, by embossing the nonwoven fabric to 20% of the area of the nonwoven fabric, and cutting the elastic single material. Elastic tie bands of disposable diapers made of bands. The single-use band paper according to claim 1, wherein the elastic melt-blown nonwoven single band paper weighs 40-120 g / m 2 and is a single-material band paper bonded by heat-pressing 2 to 4 plies of elastic melt-blown nonwoven fabric weighing 20-60 g / m 2. Elastic tieband of the diaper. The disposable diaper according to claim 5, wherein the single band material is an embossed pattern single material band paper in which two to four layers of elastic melt blown nonwoven fabric are heated and pressurized in a heating embossing roll and a cooling roll to bond the overlapping nonwoven fabric with an embossing pattern of the heating roll. Elastic tieband. The elastic tie band of disposable diaper according to claim 5, wherein the single material band paper is a flat pattern single material band paper bonded by heat-pressing elastic melt-blown nonwoven fabrics 2-4 ply on a heating roll and a cooling roll.

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