JPH11276522A - Disposable diaper throwing-away tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper throwing-away tape of a pants type which does not get in the way at wearing, provides a necessary length at throwing away the diaper and is easy to use. SOLUTION: Tensile stress is 0.08 to 2.4 kgf per one piece of tape when a self-adhesive tape 8, which constitutes a tape 15 for throwing away and is peeled to use, is extended 100% in the longitudinal direction. At this time, shrinkage of a horizontal direction is less than 50% of an original width of the tape. The self-adhesive tape is constituted by bonding more than kinds of base plates having different expansion ability, and further, an adhesive power to a back sheet after extending the self-adhesive tape 100% is more than 50 gf. A fixed tape 13 is laminated between the self-adhesive layer and the back sheet for protecting a self-adhesive layer of the self-adhesive tape, and a self-adhesive non-coating section is provided on a separating section 10 of the self-adhesive tape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper for use as a diaper for infants or incontinent persons, particularly a pants-type disposable diaper, which is attached to a diaper back sheet and used as a disposal means for contaminated diapers after use. The present invention relates to a stretchable disposal tape which does not become a hindrance at the time of mounting.

[0002]

2. Description of the Related Art Conventionally, as a disposal method of a pants-type disposable diaper, Japanese Unexamined Utility Model Publication No. 4-117618 discloses a method of disposing a diaper containing excrement by providing an adhesive application portion at a free end of a joint portion on a waist side. A method has been proposed in which the waste is rounded so as not to leak out, and the excrement is wrapped inside and discarded using an adhesive application portion. This is a tab extending to the side of the waist, but it is necessary to increase the width of the material forming the diaper in order to attach the tab, which increases the cost, and furthermore, the bonding area cannot be substantially widened. This was not always enough.

Further, if the tape end portion is directly arranged on the back sheet, the tape is detached from the back sheet portion when the tape is stretched and the tape stretching force is greater than the interlayer strength of the back sheet. Cause trouble.

In Japanese Utility Model Publication No. 8-10305,
There is disclosed a pants-type diaper in which one end of a strip-shaped tape fastener for fastening at the time of disposal is fixed, folded in the length direction thereof, and arranged so as to be located in the back side. The tape fastener needs to be longer than the opening edge of the waist portion of the pants-type diaper, so that it is folded so as not to be in the way during mounting. For this reason, in addition to the purpose of fastening, an adhesive is required to keep the tape fastener in a folded state. Moreover, the tape fastener folded when the pants or the like are put on the diaper is easily peeled off, which is inconvenient.

[0005]

DISCLOSURE OF THE INVENTION The present invention overcomes the problems of conventional pants-type disposable diapers to which a tape used at the time of disposal is attached, does not become a hindrance at the time of wearing, and is easy at the time of diaper disposal processing. The present invention provides a pants-type disposable diaper disposal tape capable of securing a necessary length for the pants.

[0006]

Means for Solving the Problems A first aspect of the present invention is a disposable diaper, particularly, an absorbent body disposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. Pants having a waist opening and a pair of leg openings formed by joining opposing side edges of a back body and a stretchable elastic member arranged along the waist opening and the pair of leg openings. In a disposable diaper, a disposal tape disposed at a substantially central portion in a width direction of a back sheet of either a front body or a back body of the diaper, wherein the disposal tape is an adhesive tape attached to a back sheet of the diaper. It has a tape alone or a fixing tape stuck to a diaper back sheet and an adhesive tape stuck thereon, and the fixing tape is fixed to the back sheet by an adhesive on one surface of the base material. The fixed part, which has a fixed part with an adhesive tape fixed to the other surface with an adhesive and a release agent coated part, if there is no fixing tape, the diaper back sheet has the adhesive tape The pressure-sensitive adhesive tape has a fixing portion and a release agent-coated portion. The pressure-sensitive adhesive tape is peeled and stretched when the diaper is discarded, and the tensile force when stretched 100% in the longitudinal direction is 0.1 mm per tape. 08-2.4kg
f, wherein the shrinkage in the tape width direction at this time is not more than 50% of the original tape width, which is a disposable diaper disposal tape.

A second aspect of the present invention is that the base material of the pressure-sensitive adhesive tape constituting the disposal tape of the first invention is constituted by bonding two or more kinds of base materials having different elasticity. Characteristic is a pants-type disposable diaper disposal tape.

[0008] A third aspect of the present invention is that the adhesive force when the tape is adhered to a back sheet of a diaper after elongating the pressure-sensitive adhesive tape constituting the disposal tape by 100%, is 1 tape.
The disposable diaper disposal tape according to the first or second aspect of the present invention, which has a weight per book of 50 gf or more.

A fourth aspect of the present invention is that the disposal tape has the fixing tape between the adhesive tape and the diaper back sheet, and the adhesive tape is fixed on the surface facing the fixing tape with an adhesive. Any of the first to third inventions, comprising a fixed portion fixed to the base, a locking portion that is an adhesive coated portion to be re-adhered after peeling, and an adhesive uncoated portion. 2. The disposable diaper disposal tape according to 1.

In a fifth aspect of the present invention, the area ratio between the locking portion of the pressure-sensitive adhesive tape and the non-adhesive-coated portion is 80/20 to 20/80. The disposable diaper disposal tape according to the fourth invention, characterized in that:

The tensile strength, the shrinkage in the width direction, and the adhesive strength at 100% elongation are measured in the following manner. (1) Tensile force at 100% elongation This is the maximum load required to pull the adhesive tape to 100% elongation. The unstretched adhesive tape or its base material is subjected to a tensile speed of 30 using a tensile tester.
Under the condition of 0 mm / min, the maximum tensile load when the film is pulled to twice the original length is measured. This maximum load is the tensile force at 100% elongation. The span length of the sample is 100
Although mm is preferable, there is no particular limitation when this length cannot be secured.

(2) Shrinkage of base material at 100% elongation This means shrinkage of the base material in the width direction of the base material when the adhesive tape is elongated by 100%. Using an unstretched adhesive tape or its base material, using a tensile tester, a tensile speed of 300 mm
Under the condition of / min, the substrate is stretched up to twice the original, and the maximum shrinkage width of the substrate during this time is measured. The ratio obtained by dividing the maximum shrinkage width at this time by the original width is the base material shrinkage at 100% elongation, and when expressed as a percentage, the following formula is used. Shrinkage in the width direction of the base material when stretched by 100% = 100 ×
{(Original substrate width)-(Minimum substrate width at 100% elongation)} /
(Original substrate width) The span length of the sample is preferably 100 mm,
When this length cannot be secured, there is no particular limitation.

(3) Adhesive force after 100% elongation to the diaper back sheet This is because the adhesive tape constituting the waste tape is 100%
Stretched, adhered to the back sheet of pants-type disposable diaper, rolled back and forth with a 2 kg roll once at a speed of 300 mm / min. After 30 minutes, using a tensile tester, a tensile speed of 3
Under the conditions of 00 mm / min and a peel angle of 180 degrees, tension, peel shape at this time, and peel force are measured. This peeling force is the adhesive force after elongation to the diaper backsheet.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The disposal tape of the present invention is a disposable diaper, particularly a stretchable disposal tape for use in disposal of a pants-type disposable diaper, which is provided on the backsheet surface of the diaper along the longitudinal direction of the diaper. It is attached to a substantially central portion in the width direction. The pants-type disposable diaper is composed of an absorbent body disposed between the liquid-permeable sheet and the liquid-impermeable sheet, and joining the opposite side edges of the front body and the back body to form an opening around the waist and a pair of An opening around the leg is formed, and a stretchable elastic member is arranged along the opening around the waist and the pair of opening around the leg. The disposal tape is configured by directly attaching an elastic adhesive tape to a diaper back sheet, or by attaching an elastic adhesive tape to a fixing tape attached to a diaper back sheet.

The elastic pressure-sensitive adhesive tape constituting this waste tape has a tensile force at 100% elongation of 0.08 to 2.4 kgf per tape and a shrinkage in the width direction of 50% or less. By using such a tape for disposal, a tape having a small area can be attached to the diaper, so that it does not become a hindrance at the time of attachment and easily secures a necessary length at the time of disposal. Can be
Furthermore, since the shrinkage force is weak, once it is attached to the back sheet, it does not come off, and the used diaper can be kept compact and sanitary disposal. Further, the adhesive strength when the adhesive tape is stretched by 100% and then adhered to the liquid-impermeable back sheet of the diaper is preferably 50 gf or more per tape, and by doing so, it is easy to dispose at the time of disposal. The tape does not come off.

Further, the disposal tape preferably has a fixing tape laminated between the adhesive tape and the back sheet. The fixing tape has a fixing portion coated with a release agent on one surface of a base material and an adhesive applied on the other surface to be attached to a back sheet of a diaper. By laminating the fixing tape, the adhesive of the pressure-sensitive adhesive tape can be protected, and the attachment of the disposal tape to the back sheet is reliable and difficult to remove.

The pressure-sensitive adhesive tape constituting the disposal tape functions to fix a used disposable diaper in a rolled state, and is a pressure-sensitive adhesive coated portion which is not peeled off on a surface facing the diaper back sheet or the fixing tape. It has a fixing portion and a locking portion which is an adhesive coated portion which re-adheres after peeling, and it is preferable to further provide an adhesive uncoated portion between the fixing portion and the locking portion. . Of these, the locking portion and the non-adhesive coated portion are portions that separate when the tape is used, and are therefore referred to as separated portions. The locking portion is attached to a release agent-coated portion of the diaper backsheet or a release agent-coated portion of the fixing tape. Further, the fixing portion and the locking portion of the pressure-sensitive adhesive tape are coated with an adhesive over the entire width in the width direction of the stretchable base material, and an adhesive-uncoated portion is provided between the fixing portion and the locking portion. Has the following effects.

Normally, when a used disposable diaper is fixed in a rolled state using a disposal tape, the adhesive tape must first be peeled off from the fixing tape, but this operation must be performed with one hand. Therefore, it must be easy to operate with only one hand (the amount of operation is small) and easily peeled off. However, if the adhesive tape is provided on the entire surface of the adhesive tape, when the discard tape is used, the locking portion must be once completely peeled off from the fixing tape. The longer the total length of the device is, the larger the operation amount is, and the operation with one hand is not easy. Also, when peeling off the adhesive tape from the fixing tape, the adhesive tape must be peeled off while being pulled, but since the base material of the adhesive tape has elasticity, the adhesive tape stretches during peeling. There is a danger that the pressure-sensitive adhesive-coated parts may be twisted and adhered to each other, and may lose the function as a disposal tape. Furthermore, if the adhesive tape is accidentally peeled off when the disposable diaper is mounted, the tape will be stretched to a certain extent, and it will be impossible to reattach the tape to the fixing tape.

However, if the adhesive coated portion (locking portion) is provided only on a part of the adhesive tape, when the discarding tape is used, the tape can be used only by peeling off only that portion. Therefore, the amount of operation is small, and operation with one hand can be performed relatively easily. In addition, elongation when peeling off the adhesive tape can be minimized.

To obtain the above effects, the area ratio is
It is preferable that the locking portion / adhesive-uncoated portion = 80/20 to 20/80, and the locking portion / adhesive-uncoated portion = 6
More preferably, the ratio is 0/40 to 30/70. If the area ratio of the locking portion, which is a pressure-sensitive adhesive-coated portion to be re-adhered after peeling, exceeds 80 area%, the above-mentioned drawbacks such as an increase in the amount of operation with one hand are unpreferable. Conversely, if the area ratio of the locking portion is less than 20% by area, sufficient locking force cannot be obtained at the time of use, so that the locking portion comes off, and the rounded used diaper spreads, resulting in a sanitary condition. It is not preferable because it may hinder proper disposal.

The disposal tape of the present invention may be used by attaching the adhesive tape alone to a diaper back sheet,
A fixing tape and an adhesive tape may be laminated and used.In the case where the adhesive tape is used alone by attaching it to a diaper back sheet, a fixing portion and a separation portion are provided on the adhesive tape, and a release agent is directly applied to the back sheet. .

The pressure-sensitive adhesive tape substrate constituting the disposal tape used in the present invention has elasticity and may be in the form of a film or a nonwoven fabric, or two or more films having different elasticities. A laminated product formed by extruding a nonwoven fabric or the like by extrusion lamination, wet lamination, melt blowing, or the like may be used. As raw materials, polypropylene, polyethylene, polyolefin resins such as polystyrene, polyethylene resins such as polyethylene terephthalate, polybutylene terephthalate and copolymers thereof, polyamide resins such as nylon 6, nylon 66,
Examples include biodegradable resins such as polyvinyl alcohol-based resins, polyurethane-based resins, polyacrylonitrile-based resins, polylactic acid, and fatty acid polyesters.

In consideration of workability such as adhesive processing and cutting to a product size, it is desirable to use a base material having a remarkable elasticity in only one of the vertical and horizontal directions. Furthermore, when the base material of the adhesive tape is formed by laminating two or more types of base materials having different stretching performances, the values of the tensile force at the time of 100% elongation and the value of the shrinkage in the tape width direction can be relatively reduced to desired values. This is preferable because it can be easily set.

Next, as the base sheet of the fixing tape,
Various films, synthetic papers, and the like are not particularly limited, but they must be made of a material that can sufficiently fix the adhesive tape with the adhesive used for the fixing portion. Further, the size of the fixing tape may be equal to that of the adhesive tape. Further, the basis weight of the base sheet of the fixing tape is 10 to 100 g / m ² ,
Preferably it is 15 to 50 g / m ² . If the basis weight of the base sheet is less than 10 g / m ² , the strength becomes weak.
When the pressure-sensitive adhesive tape is peeled and used, the fixing portion is easily broken and the discard tape is detached, which is not preferable. Conversely, if the basis weight of the base material sheet exceeds 100 g / m ² , the fixing tape becomes hard and uncomfortable when the sanitary article is attached, which is not preferable.

The adhesive used for the fixing portion and the locking portion of the disposal tape used in the present invention is a rubber-based adhesive, that is, synthetic rubber or natural rubber and a tackifier resin, a softener. , An acrylic pressure-sensitive adhesive produced by an emulsion polymerization method or a solution polymerization method, that is, a copolymer of an acrylic ester and an acrylic compound having a functional group, or a silicone pressure-sensitive adhesive, that is, silicone rubber and silicone Although it can be formed by using a mixture with a resin or the like, it is preferable to use a rubber-based pressure-sensitive adhesive in terms of cost and performance. Further, these pressure-sensitive adhesives are applied by a conventionally known coating method such as a bar coater, a gravure coater, a comma coater, a roll coater, and a die coater.

The release agent-coated portion is provided at a portion facing the locking portion, and its size is preferably equal to or larger than the locking portion. The release agent used in the release agent coating section is not particularly limited, and includes silicone-based and non-silicone-based ones used for labels and tapes. These coating methods are conventionally used such as a bar coater and a gravure coater. A known method is used.

The top sheet of the diaper using the waste tape of the present invention is a liquid-permeable sheet, and is made of polyester,
Liquid-permeable nonwoven fabrics and woven fabrics made of synthetic fibers made from polypropylene, polyethylene, other thermoplastic resins, or the like are used. Natural fibers may be used, and the fibers can be manufactured from a wide range of materials such as a combination of synthetic fibers and natural fibers. In any case, since the liquid-permeable top sheet is a portion that comes into direct contact with the skin, the liquid-permeable top sheet only needs to be soft and comfortable, and it is sufficient that the liquid-permeable top sheet is breathable. Since the center region in the width direction of the top sheet is disposed on the absorber, it is preferable that the top sheet be a hydrophilic fiber so that the liquid can be transmitted quickly. Further, it is preferable that the both side edge regions in the width direction of the liquid-permeable top sheet are water-repellent so as not to seep out from the absorber that has absorbed the liquid.

The liquid-permeable top sheet does not need to be constituted by a single sheet, but may be constituted by a plurality of sheets such as a center top sheet and a side top sheet. When the top sheet is composed of a plurality of sheets, each sheet may be made of a different material, or may be made of the same material.

The liquid-impermeable backsheet of the diaper to which the disposal tape of the present invention is attached is made of a liquid-impermeable film such as polyethylene, a material in which a non-woven fabric or a woven fabric is bonded to the liquid-impermeable film, It is made of a leaky nonwoven fabric, woven fabric, or the like, and is not particularly limited as long as the moisture in the absorber does not seep out of the diaper. Further, it may be embossed in a pattern to give a cloth-like appearance, or may be further matte-finished. When a film is used, a known moisture-permeable film that is permeable to water vapor only while being impermeable may be used, and is preferable because it prevents stuffiness. Further, the material may be elastic so as to fit the wearer.
Use of a polyurethane film, a natural rubber sheet, a foamed sheet, or the like is conceivable, and a material in which an elastic nonwoven fabric or the like is bonded may be used.

A diaper absorbent using the tape for disposal of the present invention is formed of cotton-like pulp, a highly water-absorbing polymer substance, a hydrophilic sheet or the like, and is particularly limited as long as it has water-absorbing properties. Not something. The absorbent used in the present invention is made from known absorbent materials commonly used in conventional disposable diapers and other absorbent articles. That is, it is formed from a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, wrapped by a hydrophilic sheet, and a highly water-absorbing polymer is uniformly mixed in each mat. Alternatively, they are arranged in layers between the mats. Further, the absorbent in which the superabsorbent polymer material is uniformly mixed is 3 to 60 with respect to the cotton-like pulp.
After mixing the heat-fusible substance by weight, thermocompression bonding may be performed, or only the superabsorbent polymer may be wrapped with a hydrophilic sheet.

As the cotton-like pulp, chemical pulp sheet,
It has a fiber length of 5 mm or less obtained by defibrating a waste paper pulp sheet or a mechanical pulp sheet with a crusher.
Pulp materials are not limited to conifers, but include hardwoods, straws,
Bamboo and kenaf also apply. The amount of the cotton-like pulp to be used varies depending on the target absorbent, for example, whether it is used alone, a plurality of layers are used, or another absorbent is used in combination. It is in m ^2.

Examples of the superabsorbent polymer include starch, cellulose, and synthetic polymer. That is, a starch-acrylic acid (salt) graft copolymer, a saponified starch-ethyl acrylate graft copolymer, a saponified starch-methyl methacrylate graft copolymer, a saponified starch-acrylonitrile graft copolymer, Saponified starch-acrylamide graft copolymer, saponified starch-acrylonitrile-2-acrylamide-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, A crosslinked product of sodium carboxymethylcellulose; a crosslinked product of a polyvinyl alcohol-maleic anhydride reactant;

Of these superabsorbent polymer substances, those absorbing urine, body fluid and water at least 20 times their own weight, and sodium polyacrylate-based substances are most suitable in terms of absorption performance. The distribution amount of the superabsorbent polymer material is 10 to 500 parts by weight with respect to 100 parts by weight of the dried floc pulp,
It is preferably 15 to 300 parts by weight, and such an amount of the superabsorbent polymer is substantially uniformly distributed in the cotton-like pulp. When the superabsorbent polymer material absorbs water and swells, the particles have minimal interference with each other, continuously contact and have a small permeation barrier, and permeate and absorb urine and body fluid in three-dimensional directions.

The shape of the absorber may be an hourglass, a rectangle, a T
There is no particular limitation on the character shape, etc., as long as the shape fits the inseam. In general, in order to improve the feeling of wearing, it is particularly preferable to have a shape in which the crotch portion is narrowed, such as an hourglass shape or a T shape.

The elastic member is disposed in an extended state around the leg opening, the waist opening, and the like, and is adhered and fixed with a hot melt adhesive. As the elastic member, a urethane film, urethane thread, urethane foam, thread rubber or the like is used.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a pants-type disposable diaper to which the elastic disposal tape of the present invention is attached. Figure 2
FIG. 2 is a cross-sectional view of the disposal tape in FIG. 1 taken along line XX ′. FIG. 3 shows the disposal tape in FIG.
FIG. 3 is a cross-sectional view showing another example different from FIG. 2 when cut along the line X ′. FIG. 4 is a cross-sectional view showing another example different from FIGS. 2 and 3 when the disposal tape in FIG. 1 is cut along the line XX ′. FIG. 5 is a cross-sectional view showing another example different from FIGS. 2, 3 and 4 when the discard tape in FIG. 1 is cut along the line XX ′. FIG. 6 shows the disposal tape in FIG.
FIG. 6 is a cross-sectional view showing another example different from FIG. 2, FIG. 3, FIG. 4, and FIG. FIG. 7 is a view in which the waste tape in FIG. 1 is cut along the line XX ′, FIG.
It is sectional drawing which shows another example different from FIG.4, FIG.5 and FIG.6. FIG. 8 is a perspective view showing a state in which the disposable diaper developed after use is partially rounded. FIG. 9 is a perspective view showing a state in which the disposal tape of the present invention is peeled off. FIG. 10 is a perspective view showing a state in which the disposal tape of the present invention is fixed to a rolled diaper back sheet.

Reference numeral 1 denotes an opening around the waist, 2 denotes an opening around the leg, 3 denotes a front body, 4 denotes a back body, 5 denotes a back sheet, 6 denotes a side seam, 7 denotes a top sheet, and 8 denotes a tape for disposal. , 9 is a fixed part, 10 is a separation part, 11 is a locking part,
Reference numeral 12 denotes a knob, and reference numeral 13 denotes a fixing tape (tape subjected to a peeling process).

As shown in FIG. 1, in the pants-type disposable diaper to which the disposal tape 15 of the present invention is attached, opposing side edges of the front body 3 and the back body 4 are adhesively closed by side seams 6 and opened around the waist. A portion 1 and a pair of leg openings 2 are formed, and each of the openings is formed with an elastic elastic body attached thereto. Further, a strip-shaped disposal tape 15 of the present invention, which is long and narrow along the longitudinal direction, is disposed at the center in the width direction of the back sheet 5 of the front body 3.

As shown in FIGS. 2 to 7, the disposal tape 15 is formed by bonding an adhesive tape 8 and a fixing tape 13, and the fixing tape 13 is fixed to the back sheet 5 of the diaper by an adhesive. 9 is fixed. Further, the adhesive tape 8 includes a fixing portion 9 having one end adhered and fixed to the fixing tape, and a separation portion 10 not fixed. The separation part 10 is composed of a locking part (adhesive-coated part to be re-adhered after peeling) 11 formed on at least a part or the entire surface of the separation part 10, and an adhesive-uncoated part. The adhesive-uncoated portion includes a knob 12 formed at an end of the separation portion 10. 2 to 7 show different examples of the area ratio between the locking portion and the adhesive-uncoated portion and the method of forming the knob portion.

Adhesive tape 8 constituting disposal tape 15
Means that the tensile force at 100% elongation is 0.0
It is necessary to have an extensibility of 8 to 2.4 kgf and a shrinkage in the tape width direction at 100% elongation of 50% or less. This can be achieved as long as the base sheet shows this value.

Here, the tensile force at 100% elongation is the maximum load required to pull the sample to twice its original length. In addition, shrinkage in the tape width direction at the time of 100% elongation refers to a ratio of distortion generated when the sample is pulled to 100% elongation.

If the tensile force at the time of 100% elongation of the elastic adhesive tape 8 is less than 0.08 kgf, the waste tape 8 can be stretched even with a slight force. The tape expands and the diaper spreads. Conversely, if the weight exceeds 2.4 kgf, the adhesive tape 8
It is inconvenient to handle, because a large force is required to extend the.

If the shrinkage in the tape width direction at 100% elongation is 50% or more, at the time of elongation, the adhesive tape 8 becomes string-like, and an effective adhesive area to the back sheet 5 cannot be obtained. The stopper 11 is peeled off from the back sheet, and the used diaper cannot be maintained in a rolled state, so that the sanitary disposal cannot be performed. Further, even if the adhesive force to the back sheet (liquid impermeable sheet) when the pressure-sensitive adhesive tape is stretched by 100% is less than 50 gf, the same peeling as described above easily occurs.

The basis weight of the composite base material of the adhesive tape 8 is 8 to 15
Preferably 0 g / m ^2, further 20 to 50 g / m ² is preferred. When the basis weight is less than 8 g / m ² , not only the strength is weak but also there is no stiffness, and when the adhesive tape 8 is stretched,
Inconvenient handling due to cutting of the base material. Conversely, if the basis weight exceeds 150 g / m ² , the pressure-sensitive adhesive tape 8 will be hard and the fit will be poor when the diaper is attached.

Adhesive tape 8 constituting disposal tape 15
Is preferably 0.5 to 5 cm. If it is less than 0.5 cm, the pressure-sensitive adhesive tape 8 is too thin, which is inconvenient for handling.
However, it is not preferable because it is easily broken. On the other hand, if it exceeds 5 cm, the width of the adhesive tape 8 becomes too wide, and the adhesive surfaces of the tapes tend to stick together, which is inconvenient for handling, and undesirably hinders the wearing of the diaper.

Adhesive tape Fixing tape 1 for protecting the adhesive surface
The method of fixing 3 to the back sheet 5 is generally adhesion using an organic solvent type such as acrylic, styrene, natural rubber, synthetic rubber, or fluorine, an emulsion type, or a hot melt type adhesive. .

The length of the fixing portion 9 for adhering and fixing the adhesive tape 8 to the fixing tape 13 is preferably 0.5 cm to 5 cm. If it is less than 0.5 cm, it is difficult to securely fix the adhesive tape 8 to the back sheet 5 of the diaper. Conversely, if it exceeds 5 cm, it is undesired because it becomes a hindrance during mounting.

The length of the separation portion 10 of the adhesive tape 8, that is, the length of the portion other than the fixing portion 9 to the fixing tape 13 is 0.5 to
It is preferably 9 cm. If it is less than 0.5 cm, the pressure-sensitive adhesive tape 8 is too short, and it is difficult to fix the locking portion 11 of the pressure-sensitive adhesive tape 8 to the back sheet 5 even if it is extended. In addition, when the adhesive tape 8 is forcibly extended, the adhesive tape 8 is broken. On the other hand, if it exceeds 9 cm, it is undesired because it interferes with mounting.

A grip 12 is formed at an end of the engaging portion 11 to facilitate peeling off the adhesive tape 8. The knob portion 12 may be formed without adhesive force, and may be formed by folding the end of the locking portion 11 or, as shown in FIG. May be formed by attaching a tape. Alternatively, as shown in FIG. 4, a region where the locking portion is not formed may be provided on the end of the separation portion 10 without applying an adhesive to the knob portion 12.

It is preferable that the disposal tape 15 is attached to the back sheet 5 of one of the front body 3 and the back body 4 at a substantially central portion in the width direction of the back sheet 5 so as to be elongated in the longitudinal direction. Thereby, the adhesive tape 8 of the disposal tape 15 can be attached to the back sheet 5 over the waist opening 1 around the rounded used diaper.

The disposal tape 15 is used when the used diaper is disposed of. The front seam 3 and the rear body 4 are separated by a side seam 6 of the diaper so as to be flat.
As shown in FIG. 6, the front body 3 is gradually rounded from the end, and the adhesive tape portion of the disposal tape 14 is peeled off as shown in FIG. The disposable diaper can be easily and sanitarily discarded by bonding and fixing the locking portion 11 at the end of the backsheet 5 to the backsheet 5.

Since the elastic disposal tape 15 in the disposable diaper of the present invention is attached to the diaper main body with a small area at the time of mounting, it hardly affects the fit. Then, when used at the time of disposal, which is the original purpose, the adhesive tape 8 has extensibility,
In addition, since it has an appropriate tensile force, it can be easily stretched during use and stretched to a sufficient length before being fixed to the diaper back sheet 5, thereby keeping the used diaper in a rolled state. it can. Further, since the adhesive tape 8 has a small contraction force by being set to an appropriate tensile force, the adhesive tape 8 does not come off while maintaining a sufficient length after fixing the adhesive tape 8 and the back sheet 5.
In addition, since the area of the locking portion and the non-adhesive-coated portion of the adhesive tape is set to an appropriate ratio, the peeling operation can be easily performed even when an extensible adhesive tape is used. Furthermore, not only can the disposal tape 15 be supplied at a relatively low cost, but the area of the required material is smaller than that of the conventional tape, so that the production can be performed at a low cost. By attaching such a disposal tape 15 to the diaper, the used diaper can be compactly and sanitarily disposed.

[0053]

EXAMPLES Hereinafter, the waste tape of the present invention will be described more specifically with reference to examples, but of course, the present invention is not limited thereto. In addition, the measuring method of each sample and the evaluation method of the performance in the case of using the tape for disposal are as follows.

Measurement method (1) Tensile force at 100% elongation A sample of the material of the adhesive tape constituting the waste tape was cut to a length of 150 mm or more with a width of 25 mm, and the conditions were as follows: span 100 mm, pulling speed 300 mm / min. , Tensile tester (Orientec Co., Ltd., Tensilon
RTC-1210) pull the sample piece to 100% elongation,
The maximum load (kgf) and the shrinkage in the width direction of the substrate were determined.

(2) Adhesive force to liquid impermeable sheet (diaper back sheet) An adhesive tape having a length of 100 mm and a width of 25 mm is stretched by 100%, affixed to the liquid impermeable sheet and crimped under the condition of 2 kg. After a minute, the tensile tester (Tensilon RTC-12 manufactured by Orientec Co., Ltd.) under the condition of a tensile speed of 300 mm / min.
180) peeling was performed using 10), and the peel resistance at that time was measured.

Evaluation method (1) Disposal tape attachment test After absorbing 250 cc of water into a three-dimensional pants-type disposable diaper, the front body and the back body were separated by a side seam to make a flat shape, and gradually from the end of the front body. Round off, peel off the adhesive tape of the disposal tape attached to the back body, extend the separation part, cross over the opening around the waist and fix it to the back sheet of the front body, and dispose of the disposal tape as shown in FIG. Was attached. The ease of handling at that time was evaluated organoleptically in three stages. ○: Easy to install △: Somewhat difficult to install ×: Hard to install

(2) Diaper Disposal Retention Test After the disposal tape mounting test, whether the diaper can be held in a rolled state is evaluated in three stages. ○: The diaper is held in a curled state △: The diaper is slightly spread ×: The diaper is spread

Example 1 Tensile force at 100% elongation
19 kgf / 25 mm, non-woven fabric made of polyethylene having a shrinkage in the width direction of 24.7% and a basis weight of 30 g / m ² are bonded to a urethane film, and the tensile force at the time of 100% elongation is 0.21 kgf / 25 mm, in the width direction. Shrink 2
The composite base material A having a basis weight of 60 g / m ² , which is 4.7% (length 1)
(00 mm, width 25 mm) to produce an adhesive tape 8. As shown in FIG. 2, a synthetic rubber-based adhesive was applied to the locking portion of the composite base material A and the fixing portion to the fixing tape. Further, a fixing tape of biaxially-stretched polypropylene, which has been peeled off at the contact portion of the separation portion, is laminated on the adhesive tape 8 to form a laminate (disposal tape), and a knob portion is formed at the tip of the locking portion of the composite material A. did. A synthetic rubber-based pressure-sensitive adhesive was applied to the back surface of the fixing tape of the laminate (disposal tape), and attached in the widthwise central portion of the rear body of the three-dimensional pants-type diaper, and attached in a slender manner in the longitudinal direction. Further, the performance was evaluated using the pants-type disposable diaper to which the tape for disposal was attached.

Example 2 Tensile force at 100% elongation
An adhesive tape was prepared using a nonwoven fabric B (length 100 mm, width 25 mm) made of urethane having a basis weight of 50 g / m ² and a shrinkage in the width direction of 335 kgf / 25 mm and a widthwise shrinkage of 47.7%. A tape for disposal was prepared in the same manner as described above. This disposal tape was attached to a pants-type disposable diaper, and the performance was evaluated.

Example 3 Tensile force at 100% elongation
68 kgf / 25 mm, low-density polyethylene film having a thickness of 0.015 mm and a shrinkage in the width direction of 47% (length 1
00mm, width 25mm) to make an adhesive tape,
Further, a disposal tape was prepared in the same manner as in Example 1. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

Example 4 Tensile force at 100% elongation
1 kgf / 25 mm, basis weight 4 with 28% shrinkage in width direction
An adhesive tape was prepared using a spunlaced nonwoven fabric (length: 100 mm, width: 25 mm) made of polyethylene / polyester fiber of 5 g / m ² , and a waste tape was prepared in the same manner as in Example 1. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

Example 5 Tensile force at 100% elongation
24 kgf / 25 mm, low-density polyethylene film having a thickness of 0.06 mm and a shrinkage in the width direction of 50% (length 10
(0 mm, width 25 mm), an adhesive tape was produced, and a disposal tape was produced in the same manner as in Example 1. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

[Comparative Example 1] Tensile force at 100% elongation
An adhesive tape was prepared using a spun lace nonwoven fabric (length: 100 mm, width: 25 mm) of polyethylene / polyester fiber having a basis weight of 26 g / m ² and a shrinkage in the width direction of 075 kgf / 25 mm and a width direction shrinkage of 60%. To make a tape for disposal. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

[Comparative Example 2] Tensile force at 100% elongation
A high-density polyethylene film having a thickness of 50 kgf / 25 mm and a width of 20% and a thickness of 0.015 mm (length 1
00mm, width 25mm) to make an adhesive tape,
A tape for disposal was prepared in the same manner as in Example 1 except that an acrylic re-peelable pressure-sensitive adhesive was used as the anchoring adhesive, and the tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

Comparative Example 3 Tensile force at 100% elongation
82kgf / 25mm, thickness with width direction shrinkage of 88%
0.5mm urethane film (length 100mm, width 25
mm), an adhesive tape was prepared, and a waste tape was prepared in the same manner as in Example 1. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

Comparative Example 4 Tensile force at 100% elongation
Basis weight 2 with 06 kgf / 25 mm and 69% shrinkage in width direction
An adhesive tape was prepared using a spunlace nonwoven fabric (length 100 mm, width 25 mm) made of polyethylene / polyester fibers of 0 g / m ² , and a disposal tape was prepared in the same manner as in Example 1. This waste tape was attached to a three-dimensional pants-type disposable diaper, and the performance was evaluated.

[Comparative Example 5] A polyethylene terephthalate film having a thickness of 0.025 mm (length: 100 m) is cut before reaching 100% elongation (tensile elongation: 75%)
m, width 25mm) to make an adhesive tape,
A disposal tape was prepared in the same manner as in Example 1. Attach this disposal tape to a three-dimensional pants-type disposable diaper,
The performance was evaluated. Table 1 shows the results obtained in Examples 1 to 5 and Comparative Examples 1 to 5.

[0068]

【table 1】

As can be seen from Table 1, the disposal tape obtained according to the present invention is easy to handle and the diaper can be held in a curled state. In contrast, 100
When the tensile force at% elongation is too weak (Comparative Example 1), the adhesive tape stretches with a small force, which is convenient for handling. The adhesive tape is easily stretched by an excessive force, and the diaper cannot be held in a curled state. Conversely, if the tensile force is too strong (Comparative Example 2), a strong force is required to stretch the adhesive tape, which is inconvenient to handle, and at the same time, the contraction force after stretching the tape tends to increase. After the diaper was rolled and fixed, the locking part came off.

When the shrinkage in the width direction at the time of 100% elongation is large (Comparative Example 3), even if the handling of the disposal tape before the elongation is good, the adhesive tape becomes a string-like shape by elongating, and the diaper is rounded. After being fixed, the locking part comes off and peels off from the back sheet. In addition, 100
% When the tensile force at the time of elongation is small and the shrinkage in the width direction is large (Comparative Example 4), when the adhesive tape is stretched and used,
At the same time, the adhesive tape is stretched with a slight force, and the adhesive tape is stretched by the force to spread the rolled diaper, and the diaper cannot be held in a rolled state. In the case where the elongation does not reach 100% elongation (Comparative Example 5), the handling of the waste tape is inconvenient, and it is necessary to make it longer than the waste tape of the present invention so that it can be used. The cost is high because it is required.

[0071]

[Effect of the Invention] The disposal tape in the disposable diaper of the present invention can be attached to the diaper main body with a small area at the time of mounting, and hardly affects the fit. When used at the time of disposal, the adhesive tape of the disposal tape has elasticity and an appropriate tensile force, so it is easy to stretch it during use and stretched to a sufficient length before using the back of the diaper. The used diaper can be fixed to the seat, so that the used diaper can be kept in a rolled state. In addition, since the adhesive tape has a small contraction force by being set to an appropriate tensile force, the adhesive tape is not peeled off while maintaining a sufficient length after fixing the locking portion of the adhesive tape to the back sheet. Also, by setting the area of the locking portion and the area of the adhesive-uncoated portion of the adhesive tape in an appropriate ratio, the peeling operation can be easily performed in spite of using the elastic adhesive tape. By attaching such a disposal tape to the three-dimensional pants-type diaper, the used diaper can be compactly and sanitarily disposed. Furthermore, not only can the disposal tape be supplied at a relatively low cost, but the area of the required material is smaller than that of the conventional tape, so that the production can be performed at a low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disposable diaper of the present invention to which a disposal tape is attached.

FIG. 2 is a cross-sectional view of the disposal tape in FIG. 1 taken along line X-X.

FIG. 3 is a cross-sectional view showing another example different from FIG. 2 in which the disposal tape in FIG. 1 is cut along line XX.

FIG. 4 is a cross-sectional view showing another example different from FIGS. 2 and 3 in which the disposal tape in FIG. 1 is cut along line XX.

FIG. 5 is a cross-sectional view showing another example different from FIGS. 2, 3, and 4 in which the disposal tape in FIG. 1 is cut along line XX.

FIG. 6 is a cross-sectional view showing another example different from FIGS. 2, 3, 4, and 5 in which the disposal tape in FIG. 1 is cut along line XX.

FIG. 7 is a cross-sectional view showing another example different from FIGS. 2, 3, 4, 5, and 6 in which the disposal tape in FIG. 1 is cut along line XX.

FIG. 8 is a perspective view showing a state in which the disposable diaper developed after use is partially rounded.

FIG. 9 is a perspective view showing a state in which the disposal tape of the present invention is peeled off.

FIG. 10 is a perspective view showing a state in which the disposal tape of the present invention is fixed to a rolled diaper back sheet.

[Explanation of symbols]

 1. Opening around waist 2. Opening around the leg 3. Front body 4. Back body 5. Back sheet 6. Side seam 7. Top sheet 8. Adhesive tape 9. Fixed part (adhesive coated part that does not peel off) 10. Separation part 11. Locking part (adhesive coated part that re-adheres after peeling) 12. Knob 13. 13. Fixing tape (tape coated with release agent) Release agent coating unit 15. Tape for disposal

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[Procedure amendment]

[Submission date] September 11, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

The adhesive used in the fixed portion and the locking portion of the disposal tape used in the present invention, the mixing of rubber-based adhesive, i.e., synthetic rubber or natural rubber and a tackifier resin, a softening agent Body, emulsion polymerization method, or solution polymerization method, produced acrylic adhesive, that is, a copolymer of acrylic acid ester and an acrylic compound having a functional group, or silicone adhesive, that is, silicone rubber and silicone resin Although it can be formed using a mixture or the like, it is desirable to use a rubber-based pressure-sensitive adhesive in terms of cost and performance. Further, these pressure-sensitive adhesives are applied by a conventionally known coating method such as a bar coater, a gravure coater, a comma coater, a roll coater, and a die coater.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction contents]

The basis weight of the composite base material of the adhesive tape 8 is 8 to 15
Preferably 0 g / m ^2, further 20 to 50 g / m ² is preferred. When the basis weight is less than 8 g / m ² , not only the strength is weak but also there is no stiffness, and when the adhesive tape 8 is stretched,
The substrate is cut and the handling is inconvenient. Conversely, if the basis weight exceeds 150 g / m ² , the pressure-sensitive adhesive tape 8 will be hard and the fit will be poor when the diaper is attached.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction contents]

The disposal tape 15 is used when the used diaper is disposed of. The front seam 3 and the rear body 4 are separated by a side seam 6 of the diaper so as to be flat.
As shown in FIG. 8 , the front body 3 is gradually rounded from its end, and the adhesive tape portion of the disposal tape 14 is peeled off as shown in FIG. The disposable diaper can be easily and sanitarily discarded by bonding and fixing the locking portion 11 at the end of the backsheet 5 to the backsheet 5.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction contents]

[0055] (2) liquid-impermeable sheet (diaper backsheet) adhesion to length 100 mm, elongation 100% adhesive tape width 25mm
So long is, adhered to the liquid impervious sheet, and pressed under the conditions of 2 kg, at a speed 300 mm / min condition tensile after 30 minutes,
Tensile tester (Tensilon RTC- manufactured by Orientec Co., Ltd.)
The film was peeled at 180 degrees using the method (1210), and the peel resistance at that time was measured.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction contents]

Evaluation method (1) Disposal tape attachment test After absorbing 250 cc of water into a three-dimensional pants-type disposable diaper, the front body and the back body were separated by a side seam to make a flat shape, and gradually from the end of the front body. Rounding, peeling off the adhesive tape of the disposal tape attached to the back body, extending the separated portion, fixing it to the backsheet of the front body beyond the opening around the waist, and disposing the disposal tape so as to be in the state shown in FIG. Was attached. The ease of handling at that time was evaluated organoleptically in three stages. ○: Easy to install △: Somewhat difficult to install ×: Hard to install

Claims (5)

[Claims] Claims 1. A disposal tape disposed on a backsheet of either a front body or a back body of a disposable diaper and used for rolling and holding the diaper when disposing the diaper, wherein the disposal tape is a diaper. It has an adhesive tape alone attached to the back sheet, or a fixing tape attached to the diaper back sheet and an adhesive tape attached thereon, and the fixing tape adheres to one surface of the base material The fixed part fixed to the back sheet with the agent, the other side has a fixed part and a release agent coated part with an adhesive tape fixed with an adhesive, if not having a fixing tape, the diaper back sheet The adhesive tape has a fixing portion in which an adhesive tape is fixed with an adhesive, and a release agent-coated portion. The adhesive tape is peeled and stretched when the diaper is discarded, and the tensile force when stretched 100% in the longitudinal direction is used. , 0.08-2 per tape.
A disposable diaper disposal tape characterized in that at 4 kgf, the shrinkage in the tape width direction at this time is 50% or less of the original tape width. 2. The disposable diaper disposal tape according to claim 1, wherein the adhesive tape constituting the disposal tape is formed by laminating two or more kinds of base materials having different elasticity. tape. 3. An adhesive tape constituting the disposal tape, which has been stretched by 100% and then adhered to a back sheet of a diaper, has an adhesive force of 50 g per tape.
The disposable diaper disposal tape according to claim 1 or 2, wherein the diameter is not less than f. 4. The waste tape has the fixing tape between an adhesive tape and a diaper backsheet, and the adhesive tape has a fixing portion bonded and fixed with an adhesive on a surface facing the fixing tape; The disposable diaper disposal tape according to any one of claims 1 to 3, wherein the tape has a locking portion that is an adhesive coated portion to be re-adhered after peeling, and an adhesive uncoated portion. . 5. The area ratio of the locking portion of the pressure-sensitive adhesive tape to the non-adhesive-coated portion is 80/20.
The disposable diaper disposal tape according to claim 4, wherein the ratio is from 20 to 80.