RU170415U1 - CLOTHING CLOTHING ITEM - Google Patents

Abstract

A stretchable garment (1) is described having a pair of side seam sections (4), a hole for the waist (8) and a pair of leg openings (9). The outer coating (3) on the front (F) side of the body or on the back (R) side of the body includes a sheet (10A) having areas of high density (15) and areas of low density (14) passing alternately and parallel to each other moreover, two regions (14, 15) create a striped pattern on the surface that forms the outer surface of the garment. At least one of the side suture sections (4) includes a bonded edge section (41) that is formed when the edge cover section on the front side (1A) of the body surface and the edge cover section on the back side (1B) of the body are connected by fusion-connected section (40), which extends in a continuous linear shape in the longitudinal direction of the side suture section (4). The length (L4) of the fused section (40) from the inside out (P) is less than the width of the high density region (15) and the width of the low density region (14). In the strip pattern, the direction in which the strips (35, 36) extend is inclined with respect to the longitudinal direction (X ’) of the side suture section (4) and to the direction perpendicular to it (Y’).

Description

The technical field to which the utility model relates.

[0001]

The present utility model offers a stretchable garment having side seam sections.

State of the art

[0002]

As a traditional stretchable garment, a stretchable disposable diaper is known comprising an absorbent member and an outer cover that forms the outer surface of the garment and in which a pair of side seam sections are formed when both side edge sections of the outer cover on the front side of the body and both side edge sections of the outer cover on the back of the body.

[0003]

In the conventional technique, a heating roll device is typically used to join sheets stacked on top of each other during the manufacturing phase of absorbent products, such as disposable diapers or sanitary napkins, and, as a rule, the side suture sections are formed by using a heating roll device. Other known joining methods include welding methods using laser radiation and methods using ultrasonic welding (see, for example, patent document 1), as well as methods using laser radiation (see, for example, patent document 2).

[0004]

As a rule, stretchable disposable diapers are made using the following steps. Namely, stretchable disposable diapers are made by first producing a continuous strip of diapers in which multiple diapers are connected continuously in one direction (direction of movement), as shown by reference number 10 in FIG. 9; thereafter, in the section where the lateral suture section is to be formed, the outer coating on the front side of the body surface and the outer coating on the rear side of the body surface are connected by superposing each other in a continuous strip of diapers using a connecting device such as a heating roll device ; and then cutting and dividing the continuous strip of diapers into discrete diaper items by cutting the connected section with a cutting device such as a knife. When a traditional pull-on disposable diaper of this type, manufactured as described above, is put on, the cut off edge sections in the connected sections that are formed by cutting with a cutting device protrude from the outer surface of the diaper so that the transverse side edges of the front side of the body and the transverse side edges the back of the body overlap each other, like palms attached to each other.

List of references

Patent Literature

[0005]

Patent Document 1: Japanese Patent Application JP 2006-82556 A

Patent Document 2: Japanese Patent Application JP 2010-188629 A

Patent Document 3: Japanese Patent Application JP 9-000287 U

Patent Document 4: Japanese Patent Application JP 2003-24383 A

Patent Document 5: Japanese Patent Application JP 2007-195792 A

Patent Document 6: Japanese Patent Application JP-A-2009-160919

Patent Document 7: Japanese Patent Application JP-A-2010-111058

Utility Model Essence

[0006]

In recent years, stretchable disposable diapers require an appearance that makes them look like regular underwear. However, pull-on disposable diapers have side seam sections that are not found in conventional underwear, and traditional side seam sections protrude more toward the outside of the diaper than the peripheral parts, and greatly affect the appearance of the diaper. Thus, traditional pull-on disposable diapers can hardly be considered to have an appearance reminiscent of ordinary underwear.

[0007]

In addition, during removal of the pull-on disposable diaper from the wearer's body, the diaper is usually torn so that its front side and rear side are separated in the side suture section. In order to ensure that the diaper is properly removed from the body in order to change the diaper after use, it is preferable that the side suture section can be easily torn off.

As for the side suture sections, which do not tear during use, but which can be easily torn off after using the diaper, methods have been proposed: for manufacturing welded and joined sections that pass periodically in the vertical direction of the product, in which there are welded and joined sections having high joint strength and welded and joined sections having low bond strength, adjacent to each other in the vertical direction (see patent document 3); and methods for manufacturing multiple periodic connecting lines in the longitudinal direction of the side seam section, where the interval with which the lines are located near the waist region and near the leg regions surrounding the legs is less than the interval in other sections (see Patent Document 4). Patent Document 5 describes a fusion bonding technique of both side edges of the front side and both side edges of the rear side in a state in which the inner surface overlaps with the outer surface, but not in a state in which the transverse side edges of the front side and the transverse side edges of the back side are folded with each other, like palms attached to each other.

[0008]

However, using the technologies described in patent documents 3 and 4, it is difficult to reduce the width of the side seam section and create an appearance that resembles ordinary underwear. Using the technology described in Patent Document 5, the side suture section is difficult to tear and open, and time and effort are required to break the side suture section.

It should be noted that the applicant has proposed a stretch composite sheet made by joining a stretch sheet, which includes first regions having elasticity and tensile ability, and second regions having lower tensile properties than the first regions, and another sheet, such as a non-stretch sheet, which form its opposite surfaces (see patent documents 6 and 7).

[0009]

The present utility model provides a stretchable garment comprising an outer cover that forms the outer surface of the garment in which a pair of side seam sections, a waist hole and a pair of leg holes are formed when both side edge sections of the outer cover on the front side of the body and both lateral edge sections of the outer cover on the back of the body. At least one coating of the outer coating on the front side of the body and the outer coating on the back side of the body includes a sheet having regions of high density and regions of low density alternating and parallel to each other, in which regions of high density and region of low Densities create a striped pattern on the surface that forms the outer surface of the garment. At least one of the side suture sections includes a bonded edge section that is formed by connecting the edge section of the outer cover on the front side of the body and the edge section of the outer cover on the back side of the body through a fused section that runs in a continuous linear shape in the longitudinal direction side seam section. In a cross section that is perpendicular to the direction in which the side suture section extends, the length of the fusion-connected section is from the inside to the outside, which is the direction from the side closer to the skin of the wearer of the garment to the side further from the skin, is less than the width of the high density region and the width of the low density region in the transverse direction of the garment. In the aforementioned strip pattern, the direction in which the strips extend is oblique with respect to the longitudinal direction of the side seam section and the direction perpendicular to it.

[0010]

The present utility model also provides a method of manufacturing the aforementioned stretchable garment. This method includes a compression step in which a section is brought into a compressed state where a side seam section is to be formed in a continuous outer coating, in which an outer coating is deposited on the front side of the body surface and an outer coating on the back side of the body surface; and a step of forming a lateral suture section in which the lateral suture section in the garment is formed by applying laser radiation to the aforementioned section, where the lateral suture section is to be formed, and which is in a compressed state, and then the continuous outer coating is cut and separated and fused trimmed edge sections of layered outer coatings that are formed by cutting / separating. At the stage of formation of the lateral suture section, laser radiation is applied by introducing a continuous outer coating into the translucent section, which extends in a direction perpendicular to the direction in which the continuous outer coating moves, wherein the continuous outer coating is introduced in a state in which high density regions and low density regions are inclined with respect to the translucent section.

The technical result of the claimed utility model is an improved tendency to tear side seams.

Brief Description of the Drawings

[0011]

[FIG. 1] FIG. 1 is a perspective view schematically illustrating a stretchable disposable diaper which is a stretchable garment according to an embodiment of the present utility model.

[FIG. 2] FIG. 2 is a cross-sectional view schematically illustrating a cross-section taken along line I-I of FIG. one.

[FIG. 3] FIG. 3 is a plan view schematically illustrating the diaper of FIG. 1 in its expanded and extended state.

[FIG. 4] FIG. 4 is an exploded perspective view of the diaper illustrated in FIG. one.

[FIG. 5] FIG. 5 is a cross-sectional view illustrating a stretch composite sheet that can be used for an external coating.

[FIG. 6] FIG. 6 is a perspective view illustrating only a stretch sheet in the stretch composite sheet illustrated in FIG. 5.

[FIG. 7] FIG. 7 is a side view illustrating the right side section of the diaper illustrated in FIG. one.

[FIG. 8] FIG. 8 is a cross-sectional view illustrating a side suture section and its surroundings in the diaper illustrated in FIG. 1, when observed in a direction perpendicular to the direction in which the lateral suture section extends.

[FIG. 9] FIG. 9 is a perspective view schematically illustrating the manufacturing steps of a continuous strip of diapers in the manufacturing process of the diaper illustrated in FIG. one.

[FIG. 10] FIG. 10 is a perspective view illustrating a laser coupler that is preferably used in the manufacture of a stretchable garment according to the present utility model, as well as the process of melting and cutting a continuous strip of diapers by using this laser coupler.

[FIG. 11] FIG. 11 (a) to 11 (c) are explanatory diagrams that illustrate how a continuous strip of diapers (ribbon-like outer cover) is cut and separated, whereby side suture sections (bonded edge sections) are simultaneously formed by using the laser coupler illustrated in FIG. 10.

[FIG. 12] FIG. 12 is a schematic diagram illustrating an example of how high density and low density regions are located in the side suture section.

[FIG. 13] FIG. 13 (a) to 13 (d) are diagrams corresponding to FIG. 7 and illustrating other embodiments of the present utility model.

Description of Embodiments

[0012]

The present utility model offers a stretchable garment, including lateral suture sections which are soft, and which only slightly protrude from the outer surface of the garment, and which also have excellent tearing tendency and sufficient bond strength for practical use; as well as a method of manufacturing a stretchable garment.

[0013]

Hereinafter, the present utility model is described according to its preferred embodiments with reference to the drawings. As illustrated in FIG. 1-3, a stretchable disposable diaper 1, which is a stretchable garment according to an embodiment of the utility model, includes an absorbent element 2 and an outer cover 3 that forms the outer surface of the garment, in which a pair of lateral suture sections 4, 4, a waist opening 8 and a pair of leg openings 9, 9 are formed when the transverse side edge sections A1, A1 of the outer cover 3 on the front side F of the body (abdominal section 1A) and the lateral side edge sections B1, B1 are connected outwardly of the covering 3 on the rear side R of the body (the back section 1B), the transverse side edge sections extending in the vertical direction X. The outer coating 3 is located on the side of the surface of the absorbent element 2 not in contact with the skin, and the absorbent element 2 is attached to the outer coating 3.

[0014]

As illustrated in FIG. 3, which is a top view of the diaper in the extended and extended state, the diaper 1 has a vertical direction X corresponding to the anteroposterior direction of the user and a transverse direction Y perpendicular to it. The diaper 1 can be divided into the crotch section 1C located on the crotch while wearing the diaper and also the abdominal section 1A and the abdominal section 1B, which are front and rear in the vertical direction X. The outer cover 3 in the crotch section 1C has recessed portions where leg openings 9, 9 are formed, wherein these recessed portions are formed in the transverse lateral edge sections in the vertical direction X. In addition, as illustrated in FIG. 3, the diaper 1 can be divided into the front side F and the rear side R by means of a virtual center line CL, which divides the diaper 1 in half in the vertical direction X.

[0015]

It should be noted that in the present description, the “skin-contacting surface” is the surface of the stretchable garment or its constituent elements (such as an absorbent element) that faces the wearer's skin while wearing the diaper, while “not in contact with the skin” surface ”is the surface of a stretched garment or its constituent elements, which is facing in the opposite direction from the user's skin in the process of wearing a diaper (i.e. . In the direction of clothing). In diaper 1, the “vertical direction X” represents the direction (i.e., the longitudinal direction) along the long sides of the disposable diaper or absorbent member 2, which is the constituent element of the diaper, while the “transverse direction Y” represents the width direction of the disposable the diaper or absorbent element 2, which is a constituent element of the diaper.

[0016]

As illustrated in FIG. 3, the absorbent element 2 has a vertically oblong shape that is relatively elongated in one direction (vertical direction X), and includes a face sheet (not illustrated in the drawing) that forms a skin contact surface; the back sheet (not illustrated in the drawing), which forms a surface not in contact with the skin; and a liquid-retaining absorbent core (not illustrated in the drawing) arranged so that it is between two sheets. The absorbent core has a shape that is elongated in a direction that represents the vertical direction X. The absorbent element 2 is attached to the central section of the outer coating 3 by a known joining method (for example, by means of a binder), so that the longitudinal direction of the absorbent element 2 is a vertical direction X diaper 1 in its expanded and extended state. Here, “expanded and stretched state” means a state in which the side suture sections are torn and the diaper unfolds, and by stretching the elastic elements in different sections, the expanded diaper assumes its predetermined size (which is equivalent to the size of the diaper when it becomes flat in the state in which completely eliminates the effect of elastic elements).

[0017]

As illustrated in FIG. 2 and 3, the outer cover 3 constitutes by joining the sheet of the outer layer 31, from which the outer surface of the diaper 1 is formed (the surface of the outer cover 3 not in contact with the skin); a sheet of the inner layer 32, from which the inner surface of the diaper 1 is formed (the skin surface of the outer coating 3), and which is located on the side of the inner surface (the side of the skin contacting surface) of the sheet of the outer layer 31; and numerous filamentous or ribbon-like elastic elements 5, 7, fixed by a binder material between two sheets 31, 32. Two sheets 31, 32 are connected in predetermined sections, for example, by means of a binder material or by fusion bonding.

[0018]

The outer coating 3 includes a polymeric material and is formed by using the polymeric material as its main component. As illustrated in FIG. 4, the sheet of the outer layer 31 constitutes three sheets of the outer layer 31A-31C, and thus, the outer coating 3 in the abdominal section 1A constitutes a stretch composite sheet 10S that is made by layering the sheet of the outer layer 31A and the sheet of the inner layer 32 and joining these two sheets; and the outer cover 3 in the back section 1B constitutes a stretch composite sheet 10S, which is made by layering the sheet of the outer layer 31B and the sheet of the inner layer 32 and connecting the two sheets. Examples of the sheet of the outer layer 31 and the sheet of the inner layer 32 that make up the outer coating 3 include sheets containing, as a polymer material, a hot-melt synthetic polymer, such as polyethylene, polyethylene terephthalate or polypropylene, and constitutes a non-woven fabric, film or multilayer sheet, consisting of non-woven fabric and film. Exemplary non-woven webs include breathable non-woven webs, hot-rolled non-woven webs, hydro-woven non-woven webs, spunbond non-woven webs, and meltblown non-woven webs.

[0019]

As illustrated in FIG. 3 and 4, the sheets of the outer layer 31A, 31B in each case are so long that they extend further from the section where the elastic elements 5 of the waist section are held and fixed between the sheet of the outer layer 31 and the sheet of the inner layer 32, and the corresponding protruding regions 31A ' , 31B 'of the sheets of the outer layer 31 that extend outward with respect to the sheet of the inner layer 32 are folded back toward the absorbent member 2.

[0020]

According to the present embodiment, each coating, including the outer cover 3 on the side of the abdominal section 1A, and the outer cover 3 on the side of the back section 1B, constitutes a stretch composite sheet 10S, which includes a sheet of the outer layer 31A or 31B and a sheet the inner layer 32. As illustrated in FIG. 5, the stretch composite sheet 10S is a stretch composite sheet including a stretch sheet 10A and a non-stretch sheet 16 that is laminated to the stretch sheet 10A. As illustrated in FIG. 6, the stretch sheet 10A includes first regions 14 having elasticity and tensile ability, and second regions 15 having less stretching ability than the first regions 14, and the first regions 14 and second regions 15 are formed so that they extend in a predetermined direction E, as illustrated in FIG. 6, and are formed alternately in a direction D perpendicular to a predetermined direction E. In addition, the stretch sheet 10A and the non-stretch sheet 16 are connected to each other on respective opposite surfaces, and the composite sheet generally has a tensile capacity of at least in a direction perpendicular to a predetermined direction E.

In addition, as illustrated in FIG. 5, the stretch composite sheet 10S shrinks in its natural state, and numerous first long narrow bulges 17 that extend in a predetermined direction E are formed on the surface of the region on the side of the non-stretch sheet 16, with the stretch sheet 10A and the non-stretch sheet 16 joining over almost the entire area of this areas, as well as numerous second long narrow bulges 19, each of which has a lower height than the height of the first long narrow bulge 17, are formed on the surface on the side non-stretch sheet 10A. The first long narrow bulges 17 and the second long narrow bulges 19 are formed alternately in a direction D perpendicular to a predetermined direction E. In addition, as illustrated in FIG. 6, the stretch sheet 10A is formed when multiple elastic fibers 13 are attached to the stretchable nonwoven fabric so that they extend in the same direction without intersecting each other, and the elastic fibers 13 join the stretchable nonwoven fabric throughout its length in almost unstretched condition. Thus, the stretch sheet 10A has the ability to stretch in the direction in which the elastic fibers 13 extend.

Furthermore, since the numerous first regions 14 have elasticity and tensile ability, the stretch sheet 10A has the tensile ability in the D direction. The second regions 15 in the stretch sheet 10A have a lower tensile capacity than the first regions 14.

[0021]

The non-stretch sheet 16 has an almost zero stretch ability. Here, “stretching ability” is the stretching ability of the sheet itself.

It turns out that the non-stretch sheet 16 has zero stretch ability, at least in the direction (direction D) perpendicular to the direction (direction E) in which the first and second regions extend, and it turns out to be more preferable that the non-stretch sheet 16 has zero stretch ability in both directions, including direction E and direction D. Non-stretch sheet 16 may be a sheet that has zero stretch ability in all directions, parallel lenny its front and back surfaces.

[0022]

The expression “the sheet has practically zero tensile ability in a given direction” means that the sheet is only slightly stretched, even if a tensile force is applied to the sheet in a given direction. For example, if a specimen is 15 cm long and 5 cm wide is stretched in the longitudinal direction using a tensile material research device such as Tensilon, and the elongation at break at the moment the specimen breaks is 10% or less, then it is considered that This specimen has practically zero longitudinal stretching ability.

It should be noted that the elongation at break can be calculated as follows: {length of the sample at break - the original length of the sample} / {initial length of the sample} • 100. In addition, it should be noted here that the longitudinal direction of the sample is the same as the aforementioned “predetermined direction”.

[0023]

As illustrated in FIG. 5, the stretch sheet 10A and the non-stretch sheet 16 are joined over almost the entire area of their opposite surfaces using a bonding material (such as a hot-melt binder) 18. Examples where two sheets are joined over almost the entire area include cases where the entire surface at least one sheet of stretch sheet 10A and non-stretch sheet 16 is coated with a binder using a coating gun, etc., and two sheets are connected to each other; and cases where the first regions 14 and the non-stretch sheet 16, as well as the second regions 15 and the non-stretch sheet 16 are connected in the same way, forming a similar pattern and using a spray gun, a spiral gun or a roller coater. It is not necessary to connect the stretch sheet 10A and the non-stretch sheet 16, using the binder material 18, in the entire area where the two sheets are opposite each other, but they can only connect in the area where the formation of the first long narrow bulges 17 is desired. In those areas where the first long narrow bulges 17 should not form, the sheets may be partially joined or not connected at all. The connection is carried out over the entire area in those areas where the first long narrow bulges 17 should form.

[0024]

The stretch composite sheet 10S according to the present embodiment is contracted in a state in which no external force is applied (i.e., in its natural state), and at least in a compressed state, numerous first long narrow bulges 17, 17 ... are formed on the surface of the stretchable composite sheet 10S on the side of the stretchable sheet 16. numerous first long narrow bulges 17, 17 ... are formed so that they pass almost parallel to the direction E, in which first and second regions 14, 15 are formed. Furthermore, in the stretch composite sheet 10S used according to the present embodiment, since the first and second regions 14, 15 are formed at equal intervals in the D direction, the numerous first long narrow bulges 17, 17 ... in each case has almost the same height and width.

Similarly, numerous second long narrow bulges 19, 19 ..., each of which has a lower height than the first long narrow bulge 17 are formed on the surface of the stretch composite sheet 10S on the side of the stretch sheet 10A. Also, numerous second long narrow bulges 19, 19 ... are formed so that they extend almost parallel to the direction E, in which the first and second regions 14, 15 pass, and in each case have almost the same height and width.

It should be noted that the stretch composite sheet 10S according to the present embodiment is capable of stretching in the D direction until the non-stretch sheet 16 becomes practically flat, and in this state, the first long narrow bulges 17 disappear. When the force that causes the tension is weakened, the stretchable composite sheet 10S is compressed and returns to its original state in which the numerous first long narrow bulges 17 are formed. It is sufficient if the numerous first long narrow bulges 17 in the stretch composite sheet according to the present utility model are formed. at least in a natural state. Similarly, it turns out to be sufficient if the second long narrow bulges 19 are formed, at least in their natural state.

[0025]

The pitch P1 between the upper sections of the first long narrow bulges 17 of the stretch composite sheet 10S, and the pitch P2 (see FIG. 5) between the upper sections of the second long narrow bulges 19 is preferably 0.5 mm or more and more preferably 1 mm or more, and preferably 5 mm or less and more preferably 3 mm or less, and more specifically, preferably from 0.5 to 5 mm and more preferably from 1 to 3 mm.

In addition, the height T1 (see FIG. 5) of the first long narrow bulge 17 is preferably 0.5 mm or more and more preferably 1 mm or more, and preferably 5 mm or less and more preferably 3 mm or less, and more specifically preferably from 0.5 to 5 mm and more preferably from 1 to 3 mm.

The height T2 (see FIG. 5) of the second long narrow bulge 19 is preferably 0.01 mm or more and more preferably 0.05 mm or more, and preferably 3 mm or less and more preferably 2 mm or less, and more particularly preferably from 0.01 to 3 mm and more preferably from 0.05 to 2 mm.

[0026]

The structure of the stretch composite sheet 10S that is used according to the present embodiment, methods for measuring pitch P and height T, as well as preferred manufacturing methods are described in more detail in Japanese Patent Application JP 2009-160919 A.

Next, a preferred structure of the stretch sheet 10A that is used in the stretch composite sheet 10S will be described. The stretch sheet 10A has a structure in which filamentary elastic fibers (elastic filaments) are attached to the stretch fiber layer, which are mainly non-elastic fibers, and, as illustrated in FIG. 6, it consists of two sheets 11 and 12 and numerous filamentous elastic fibers 13 located between the sheets 11, 12. Each of the sheets 11, 12 is a “stretchable fibrous layer, which consists mainly of inelastic fibers” (although inelastic fibers are not illustrated in Fig. 6). The percentage of inelastic fibers in each of the sheets 11, 12, which mainly comprise inelastic fibers, is preferably 90 wt.% Or more and more preferably 91 wt.% Or more, and it can be 100 wt.%.

[0027]

Both sheets 11, 12 are stretchable. Sheets 11, 12 are capable of stretching in the same direction as the direction (transverse direction Y) in which the elastic fibers 13 extend. Here, the term “stretching” extends to (a) cases where the constituent fibers of sheets 11, 12 themselves are stretched; and (b) cases where the constituent fibers themselves are not stretched, but the sheet 11, 12 is generally stretched, for example, as a result of the separation of fibers that were associated with fiber intersection points, junctions, etc., and a corresponding change in three-dimensional the structure that the fibers form, or the breaking of the constituent fibers.

[0028]

Sheets 11, 12 can be stretched in their original textile state before attaching elastic fibers 13. Alternatively, sheets 11, 12 can be sheets that are not stretched in their original textile state before attaching elastic fibers 13, but they acquire the ability to stretch by treatments in such a way that they become stretched after attaching elastic fibers 13. Specific exemplary methods that make sheets stretch are ter nical processing, stretching between rolls, stretching by engagement between the teeth and the grooves or between the gears, as well as stretching using a stretching frame.

[0029]

Sheets 11, 12 are stretchable and practically inelastic. Here, the term “elastic” means the ability to stretch and contract after weakening the tensile force. This characteristic is absent in sheets 11, 12.

[0030]

Elastic fibers 13 are formed by stretching the elastic polymer in its molten or softened state. Numerous elastic fibers 13 are substantially continuous throughout the entire length of the stretch sheet 10A (throughout the entire length of the outer coating 3 in the transverse direction Y). Numerous elastic fibers 13 are arranged so that they extend in the same direction (transverse direction D), and as a result, they do not intersect with each other. It should be noted that an unplanned intersection of the elastic fibers 13 is allowed, caused by the inevitable variability of the manufacturing conditions of the stretch sheet 10A. The elastic fibers 13 can extend linearly, or they travel in a winding path, provided that they do not intersect with each other.

[0031]

Elastic fibers 13 are attached to the sheets 11, 12 in a practically unstretched state. Since the elastic fibers 13 are not stretched, there are advantages in that there is no relaxation (creep) caused by stretching, and that the tensile ability does not deteriorate after processing, such as stretching, and during storage of the original textile material obtained after joining the elastic fibers 13 to sheets 11, 12. In addition, deformation caused by compression does not occur in the rolled up textile material. Another advantage is that since the elastic fibers are joined in an unstretched state, it is possible to stretch to the length to which sheets 11, 12 can stretch, or to the maximum degree of deformation of the elastic fibers 13.

[0032]

The diameter of the elastic fiber 13 is not limited in a predetermined manner, but from the point of view of an excellent balance between the texture of the stretch sheet 10A and the productivity of the elastic fibers 13, the diameter of the elastic fibers 13 is preferably 10 μm or more and more preferably 20 μm or more, and preferably 200 μm or less, and more preferably 130 microns or less, and more specifically, preferably 10 to 200 microns and more preferably 20 to 130 microns.

[0033]

The cross section of the elastic fiber 13 may be round, but in some cases it may be elliptical. For example, in cases where the stretch sheet 10A is manufactured according to the manufacturing method described above, the cross section of the elastic fibers 13 generally becomes elliptical. In such cases, it is preferable in the stretch sheet 10A to arrange the elastic fibers 13 so that the major axis of the elliptical shape extends in the same direction as the direction in the plane of the stretch sheet 10A, and the minor axis runs in the same direction as the thickness direction of the stretch sheet 10A .

[0034]

From the point of view of manufacturing a stretch sheet 10A having sufficient stretch ability and an excellent texture resembling a fabric texture, the pitch between adjacent elastic fibers 13, 13 (i.e., the distance between the respective centers of adjacent elastic fibers) is preferably 0.1 mm or more and more preferably 0.4 mm or more, and preferably 5 mm or less and more preferably 1 mm or less, and more specifically, preferably from 0.1 to 5 mm and more preferably from 0.4 to 1 mm, provided that the diameter elasti The total fiber 13 is within the aforementioned range.

[0035]

In the stretch sheet 10A, numerous elastic fibers 13 are attached to the sheets 11, 12 along their entire length. Here, the term “attach along its entire length” does not require that all fibers (fibers constituting the sheets 11, 12) that are in contact with the elastic fibers 13 are connected to the elastic fiber 13, but means that the elastic fibers 13 and the constituents the fibers (inelastic fibers) of the sheets 11, 12 are connected in such a way that there are no unplannedly formed unconnected sections in the elastic fibers 13. Since the elastic fibers 13 are attached to the sheets 11, 12 over their entire length, the force for connecting the elastic fibers 13 to the sheets 11, 12 can increase sufficiently. As a result, the elastic fibers 13 are less prone to peeling from the sheets 11, 12, even if the stretch sheet 10A stretches and lengthens. If the elastic fibers 13 peel off from the sheets 11, 12, gaps will be formed between the elastic fibers 13 and the sheets 11, 12 in their natural state (relaxed state), which worsens the sense of integrity of the entire stretch sheet 10A.

[0036]

In addition, in the stretch sheet 10A, some of the many inelastic fibers that are included in the sheets 11, 12 are fused and immersed in elastic fibers 13. All or some of the inelastic fibers that are on the periphery of each elastic fiber 13 can be immersed in elastic fiber 13. Here, the term “immersed” means a state in which, at the point of intersection between the inelastic fiber and the elastic fiber 13, the portion of the inelastic fiber that is at the point of intersection is lowered into the portion of the elastic fiber 13 that is at a given point of intersection. Thus, according to the present utility model, the meaning of the term “immersed” does not extend to a state in which the corresponding surfaces of the inelastic fiber and the elastic fiber 13 are connected to each other along a line or at a point. In addition, from the point of view of improving the bond strength between inelastic fibers and elastic fibers 13, it is preferable that the inelastic fiber is immersed in the elastic fiber 13 to a depth that is greater than or equal to half the diameter of the inelastic fiber.

[0037]

Since the elastic fibers 13 and the inelastic fibers that are contained in the sheets 11, 12 are joined in the aforementioned state, the bond strength between the elastic fibers 13 and the sheets 11, 12 is increased, and delamination is less likely to occur between the elastic fibers and the sheets when the stretch sheet 10A stretched out. As a result of this, when the stretch sheet 10A is stretched, the sheets 11, 12 are stretched with good correspondence with respect to the stretching of the elastic fibers 13, and thus, a beneficial effect is achieved in that the stretch sheet 10A acquires excellent stretch ability. In addition, since the elastic fibers 13 and the inelastic fibers that are contained in the sheets 11, 12 are connected in the aforementioned state, the elastic fibers 13 are in close contact with the sheets 11, 12, and thus the level differences between the sections become less noticeable, where elastic fibers 13 are present, and in sections where they are absent, and as a result, a beneficial effect is achieved in that the stretch sheet 10A acquires an excellent texture.

[0038]

It should be noted that the aforementioned state of immersion of inelastic fibers in elastic fibers 13 can be observed in sections of the outer cover 3 (stretch sheet 10A) that were subjected to bonding, but they cannot be observed in sections subjected to bonding, such as side seam sections 4 . Here, “bonding processing” is a process in which a material (polymer) melts to form an outer coating 3, and corresponding examples are the effects of heating and pressure such as embossing, ultrasonic bonding, and laser irradiation processing. The bonding treatment causes a change in the original state of immersion of inelastic fibers into elastic fibers 13, and this immersion state may disappear. Thus, the fact that inelastic fibers are immersed in elastic fibers 13 or not should be confirmed in sections of the outer coating 3 that have not been subjected to bonding.

[0039]

A preferred method for producing the stretch sheet 10A and use it to produce the stretch composite sheet 10S is described in FIG. 4 of Japanese Patent Application JP 2009-160919 A. By manufacturing the stretch sheet 10A according to this preferred manufacturing method, a “condition in which inelastic fibers are fused and immersed in elastic fibers 13” can be obtained. In addition, according to the aforementioned manufacturing method, no heat acts on the sheets 11, 12, but the elastic fibers 13 that are obtained by melt spinning are fused to the sheets 11, 12 before the elastic fibers solidify. Thus, only the fibers that are on the periphery of the elastic fibers 13 are connected to the elastic fibers 13, and the fibers that are further from the elastic fibers 13 support the texture of the sheets 11, 12, and as a result, the advantage of maintaining an excellent texture of the stretch sheet 10A .

[0040]

As described above, in the stretch sheet 10A, the connection of the elastic fibers 13 with the sheets 11, 12 is provided by the fibers (inelastic fibers) that make up the sheets 11, 12 and are fused to the elastic fibers 13 in a state in which they are immersed in the elastic fibers 13; thus, bonding is achieved without the use of a binder material, such as a hot-melt binder. Thus, no adhesive material is present in the sheets 11, 12, which are stretch fibrous layers consisting mainly of inelastic fibers and elastic fibers 13 attached thereto.

[0041]

The stretch sheet 10A stretches in the direction representing the direction (transverse direction Y) in which the elastic fibers 13 extend. The stretchability of the stretch sheet 10A is ensured by the elasticity of the elastic fibers 13. When the stretch sheet 10A stretches and lengthens in the same direction as which are the elastic fibers 13, the elastic fibers 13 and the sheets 11, 12 are stretched. When the stretching / extension of the stretch sheet 10A is stopped, the elastic fibers 13 are contracted, and in accordance with this contraction, the sheets 11, 12 return to their state that existed before the stretching and elongation. Furthermore, in the stretch sheet 10A there are no other elastic fibers attached in a direction perpendicular to the elastic fibers 13, and thus, when the stretch sheet 10A is stretched and extended in the same direction as the direction (transverse direction Y ), in which the elastic fibers 13 pass, the stretch sheet 10A stretches, and only a slight “transverse shrinkage” occurs, as a result of which the stretch sheet 10A contracts in the transverse direction enii Y.

[0042]

Next, materials that form the stretch sheet 10A will be described. Inelastic fibers, which are practically inelastic, are used as the fibers constituting sheets 11, 12 (stretch fibrous layers consisting mainly of inelastic fibers), and corresponding specific examples are fibers that contain polyethylene (PE), polypropylene ( PP), polyesters such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and polyamides. The fibers that make up sheets 11, 12 can be short fibers or long fibers, and they can be hydrophilic or hydrophobic. In addition, conjugate fibers, such as those containing core and cladding fibers or containing parallel fiber components, split fibers having a modified fiber cross-section, corrugated fibers or shrink fibers can be used. Individual fibers of the same type may be used, or fibers of two or more types may be used in combination.

[0043]

Each sheet 11, 12 may be a non-woven fabric, which are continuous fibers or short fibers. In particular, in order to produce a thick and bulk stretch sheet 10A, it is preferable that the sheets 11, 12 are non-woven webs consisting of short fibers. Exemplary non-woven webs include breathable non-woven webs, hot-rolled non-woven webs, hydro-woven non-woven webs, spunbond non-woven webs, and meltblown non-woven webs. Sheet 11 and sheet 12 may be of the same type, or they may be of different types. Here, “sheets of the same type” means sheets for which all parameters are the same, for example, the manufacturing process of the sheets, the types of the fibers constituting the sheets, the diameter and length of the constituent fibers, the thickness and surface density of the sheets. If one or more of these parameters are different, then these sheets are “sheets of various types”.

[0044]

It is preferable that the constituent fibers (inelastic fibers) in each sheet 11, 12 contain at least two components, including a low-melting component and a high-melting component. In such cases, the constituent fibers are connected to each other at their intersection points by fusion bonding of at least the fusible component. An exemplary preferred core and sheath-containing conjugate fiber comprising at least two components, including a low-melting component and a high-melting component, is a fiber in which the core is a high-melting PET or PP, and the sheath is a low-melting PET, PP or PE . The use of such conjugated fibers is particularly preferred since melting with the elastic fibers 13 becomes strong and delamination between them becomes less likely.

[0045]

The thickness of each of the sheets 11, 12 is preferably 0.05 mm or more and more preferably 0.1 mm or more, and preferably 5 mm or less and more preferably 1 mm or less, and more specifically, preferably from 0.05 to 5 mm and more preferably 0.1 to 1 mm. The thickness of each sheet can be determined as follows: first, the measured sheet is placed between the flat panels, and a load of 0.5 cN / cm ^{2 is} applied to it; then the cross section of this sheet is observed at a magnification of 50 to 200 times using a microscope (VHX-1000 from Keyence or another microscope) at three separate points in the longitudinal direction of one diaper, the thickness of each cross section is measured and the average value of the thickness measured in these three points. In addition, from the point of view of texture, thickness and aesthetics of the structure, the surface density of each of the sheets 11, 12 is preferably 3 g / m ² or more and more preferably 5 g / m ² or more, and preferably 100 g / m ² or less and more preferably 30 g / m ² or less, and more specifically, preferably from 3 to 100 g / m ² and more preferably from 5 to 30 g / m ² .

[0046]

In terms of tensile ability, texture, thickness and cost, the surface density of the numerous elastic fibers 13 located between the sheets 11, 12 (the surface density of the layer of elastic fibers) is preferably 3 g / m ² or more and more preferably 4 g / m ² or more and preferably 30 g / m ² or less and more preferably 15 g / m ² or less, and more specifically, preferably from 3 to 30 g / m ² and more preferably 4 to 15 g / m ² .

[0047]

The material for elastic fibers 13 is, for example, a thermoplastic elastomer or rubber. In particular, if a thermoplastic elastomer is used as this material, it becomes possible to spin from the melt using an extruder, as is the case with conventional thermoplastic polymers. In addition, the elastic fibers obtained in this way can easily provide fusion bonding, and are therefore suitable for stretch sheet 10A. Exemplary thermoplastic elastomers are styrene-based elastomers such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene) and SEPS (styrene-ethylene-propylene-styrene) ); olefin-based elastomers (elastomers based on copolymers of ethylene and alpha-olefins or elastomers based on copolymers of propylene and ethylene, butene, octene, etc.); polyester elastomers; and polyurethane based elastomers. One elastomer of the same type can be used individually, or two or more types of elastomers can be used in combination. In addition, you can use containing core and sheath or parallel to the components of the fiber, which make up the above polymers.

[0048]

A stretch sheet (a sheet having high density and low density regions extending alternately and parallel to each other) 10A in the stretch composite sheet 10S that is used according to the present embodiment is a sheet in which stretch ability is created or increased by machining on teeth / grooves. The method described in Japanese patent application JP 2009-160919 can be used as a way to create or increase the tensile ability by machining on the teeth / grooves.

[0049]

Non-woven fabrics obtained, for example, by various manufacturing methods, can preferably be used as non-stretch sheet 16, which is part of the stretch composite sheet 10S. Examples of non-stretch sheet 16 are spunbond nonwoven webs, breathable nonwoven webs and needle-punched nonwoven webs. Among the above types, spunbond nonwoven webs are preferred. It turns out that the direction of orientation of the fibers in the spunbond nonwoven fabric coincides with the direction in which the elastic fibers pass.

Exemplary constituent fibers that form the nonwoven fabric used as the non-stretch sheet 16 include fibers which are, for example, polyethylene (PE), polypropylene (PP), polyester (PET or PBT), or polyamide. The fibers constituting the non-woven fabric that is used as the non-stretch sheet 16 may be short fibers or long fibers, which may be hydrophilic or hydrophobic. In addition, conjugated fibers, such as those containing core and cladding fibers or containing parallel fiber components, split fibers or having a modified fiber cross-section, can be used. Individual fibers of the same type may be used individually, or fibers of two or more types may be used in combination. The nonwoven fabric may be a nonwoven fabric that consists of continuous fibers or short fibers. In particular, it is preferable that the nonwoven fabric is composed of continuous fibers.

As the stretchable composite sheet, which is suitable for use according to the utility model, for example, the sheet described in Japanese Patent Application JP 2010-111058 A or a sheet consisting of only the stretchable sheet 10A can be used.

[0050]

In the diaper 1 according to the present embodiment, the sheet of the outer layer 31A and the sheet of the outer layer 31B are in each case from the stretch sheet 10A; the sheet of the inner layer 32 consists of a non-stretch sheet 16; and a stretch composite sheet 10S having the aforementioned structure is formed by joining the sheets using a binder material. It should be noted that the sheet of the outer layer 31C that forms the crotch section 1C is located between the sheet of the outer layer 31A located on the side of the stomach section 1A and the sheet of the outer layer 31B located on the side of the back section 1B. The sheet of the outer layer 31C in the crotch section 1C is connected by superposing its both end sections 31Ce on the end section 31Ae of the sheet of the outer layer 31A and the end section 31Be of the sheet of the outer layer 31B.

[0051]

In the diaper 1 according to the present embodiment, the outer cover 3 on the front side F of the body surface and the outer cover 3 on the back side R of the body surface in each case include a stretch sheet 10A; the stretch sheet 10A undergoes the aforementioned tooth / groove processing; and regions of high density and low density in sheet 10A create a strip pattern on the surface that forms the outer surface of the garment. Furthermore, by converting the stretch sheet 10A, which is machined on the teeth / grooves, into a stretch composite sheet 10S, as described above, numerous long narrow bulges are formed on both surfaces of the stretch composite sheet 10S. By applying the stretch composite sheet 10S to the outer surface of the garment, a strip pattern is created on the surface that forms the outer surface of the garment. The sheet forming the outer surface of the garment may consist only of a stretch sheet 10A, or it may consist of a stretch composite sheet 10S. Alternatively, the surface that forms the outer surface of the garment may acquire a striped pattern by using other methods, such as printing. However, it turns out to be preferable to use the tensile composite sheet 10S as a sheet forming the outer surface of the garment, in terms of visibility and regularity of the striped pattern, softness of the outer surface, and also manufacturability.

In any case, the outer coating 3 on the front side F of the body surface and the outer coating 3 on the rear side R of the body surface in each case include a tooth / groove stretch sheet 10A, and include first regions 14 having elasticity and tensile ability and second regions 15 having less stretching ability than the first regions 14. When the stretch sheet 10A or the stretch composite sheet 10S is stretched in the stretching direction (direction D), the first regions 14 having elasticity and are capable of stretching, stretch to a high degree, while the second regions 15 do not stretch as much as the first regions. Thus, the first regions 14 turn into low-density regions 14, and the second regions 15 turn into high-density regions 15, and these regions pass alternately and parallel to each other.

As described above, it is sufficient if there is a difference in density between the low density regions 14 and the high density regions 15, at least in the stretched state.

[0052]

In the diaper 1 according to the present embodiment, the strips 35 in the strip pattern of the outer cover 3 on the front side F of the body surface are the second long narrow bulges 19 on the stretch composite sheet 10S, which look like lines and, as illustrated in FIG. 7, the direction E in which the strips 35 extend is inclined with respect to the longitudinal direction X ’of the side suture section 4 and to the direction Y’ perpendicular to the longitudinal direction X ’. Similarly, the strips 36 in the strip pattern of the outer cover 3 on the back side R of the body surface are the second long narrow bulges 19 on the stretch composite sheet 10S, which look like lines and, as illustrated in FIG. 7, the direction E in which the strips 36 extend is inclined with respect to the longitudinal direction X ’of the side suture section 4 and to the direction Y’ perpendicular to the longitudinal direction X ’. It should be noted that in the outer cover 3 on the front side F of the body surface and in the outer cover 3 on the back side R of the body surface according to the present utility model, the surface of the stretch composite sheet 10S on the side of the non-stretch sheet 16 can form the outer surface of the diaper, and the strip pattern can make up the first long narrow bulges 17 that look like lines.

[0053]

In order to make the stripe pattern more visible, as well as to facilitate tearing of the side seam section after using the diaper, it is preferable that the stretch sheet is a stretch sheet that is formed by attaching to the stretch nonwoven fabric numerous elastic fibers that are arranged so that they pass in one direction without intersecting with each other, moreover, the elastic fibers are attached to the stretch non-woven fabric on the prot an expression of its entire length in a practically unstretched state; and the stretch sheet acquires the ability to stretch when it is machined on the teeth / grooves in the direction in which the elastic fibers of the stretch sheet extend.

[0054]

In addition, as illustrated in FIG. 2, each of the side suture sections 4, 4 in the diaper 1 includes a bonded edge section 41, which is formed by connecting the edge section of the outer cover 3 on the front side F of the body and the edge section of the outer cover 3 on the back side R of the body using the fused section 40 , which runs in a continuous linear shape in the longitudinal direction of the side suture section 4. A fastened edge section 41 in the diaper 1 is formed in each of the side suture sections 4, 4 continuously throughout the entire length between the opening for t Alium 8 and corresponding leg openings 9. A fusion-connected section 40 in the bonded edge section 41 is formed by melting and hardening the constituent polymers in multiple sheets (sheets of the outer layer 31 and sheets of the inner layer 32) that make up the corresponding outer coatings 3 in a state which overlap (overlap) the edges of these sheets.

[0055]

As illustrated in FIG. 8, in a cross section that is perpendicular to the direction in which the side suture section 4 extends when the garment is worn, the fastened edge section 41 in the side suture section 4 has a shape in which the outer edge 4a formed by the fused joint section 40, deepens toward the inside of the garment. In addition, in the same cross section, there is a small width W4 of the fusion-connected section 40 located in the bonded edge section 41, which is on the outer surface of the diaper, and this width W4 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less.

[0056]

It should be noted that, as illustrated in FIG. 11 (c) and FIG. 2, in a cross section in a direction that is the transverse direction Y of the diaper 1 and is perpendicular to the direction in which the lateral suture section 4 extends in a flat state in which the abdominal section 1A (the front of the body F) is layered and the back-mounted section 1B (rear side of the body R), each lateral suture section 4 (bonded edge section 41), which is formed by the aforementioned cutting / separation, becomes so that the outer edge 4a, which the second one forms the outer edge of the fused section 40, has an arc shape that projects toward the inside of the diaper 1. In addition, the fused section 40, which is formed by the four sheets 31, 32 constituting the corresponding outer coatings 3, forms in the diaper section 1, being inside with respect to the outer edge 4a, including the outer edge 4a. The width of the fusion-coupled section 40 is greater in its central section in the thickness direction (top-down direction in FIG. 11 (c)) of the outer coatings 3 than both end sections (upper and lower end sections). More specifically, in the cross-sectional image in the transverse direction Y of the diaper 1 (i.e., in a direction perpendicular to the cutting / separation direction of the laser beam), the width of the fusion-connected section 40 gradually increases as it approaches its center section in the thickness direction, and the fusion-coupled section 40 is formed so that it takes the shape of a sickle or crescent shape (the fusion-coupled section 40 illustrated in FIG. 11 (c) has the shape of a sickle).

[0057]

The lateral suture section 4 includes a fusion section 40, which is formed by melting and hardening the sheet-forming materials, and thus the lateral suture section 4 is a section that may impair the wearing comfort of the diaper 1, since it is stiffer and unsatisfactory texture compared to other sections in the diaper 1. However, when a fusible section 40 is formed, having the shape of a sickle or crescent in the cross-sectional image in As the diaper 1 is wide, it is possible to reduce the proportion of the fusion-connected section 40, which is located at the corners 3S of the lateral edge section of the outer coatings 3 constituting the lateral suture section 4, in comparison with cases where the cross-section of the fusion-connected section has a rectangular shape, as in traditional lateral suture sections. Thus, the softness and texture that originally had 3S angles are less degraded, and as a result, the comfort of wearing this diaper is improved compared to traditional diapers. On the other hand, the fused joint section 40 is present sufficiently in the central section in the thickness direction of the lateral edge section of the outer coating 3 (the central section is located between the angle 3S on the side of one surface of the outer coating 3 and the angle 3S on the side of the other surface) the width direction is a section that greatly affects the fusion strength of the side suture section 4. Thus, the side suture section 4 has soy strength Inonii melting which is sufficient for practical use, and decreases the probability of disadvantages such as rupture lateral seam section 4 during wearing of the diaper 1.

[0058]

The side suture section 4 according to the present embodiment has the advantage that the side suture section 4 is soft because the width W4 of the outer surface of the diaper is small and the length L4 from the inside out of the diaper P is also small. However, the location of the lateral suture section 4 may not be sufficiently visible from the outside while wearing the diaper 1, or when it is in its natural state (compressed state). If the lateral suture section 4 is poorly visually visible, then the detection of the lateral suture section 4 may be difficult when the diaper 1 is removed after use by one of the parents (e.g. mother) or another person who is caring for a child or adult using the diaper, and for removing the diaper 1 may take time and effort.

[0059]

In this regard, in the diaper 1 according to the present embodiment, the outer cover 3 on the front side F of the body surface has a striped pattern, and as illustrated in FIG. 7, the direction E in which the strips 35 extend is inclined with respect to the longitudinal direction X ’of the side suture section 4 and the direction Y’ perpendicular to it. Thus, the lateral suture sections 4 have excellent visibility without losing their softness and good texture.

Furthermore, in the diaper 1 according to the present embodiment, the strip pattern of the outer cover 3 on the rear side R of the body surface is formed so that the direction E in which the strips 36 pass is inclined with respect to the longitudinal direction X 'of the side suture section 4 and to the direction Y 'perpendicular to it, and the direction of inclination of the strips in the figure on the front side F of the body surface is different from the direction of the inclination of the strips in the figure on the back side R of the body surface. Thus, the side suture sections 4 have even better visibility.

[0060]

In addition, the length L4 (see FIG. 2) of the fusion-connected section 40 of the side seam section 4 in the above-mentioned direction from the inside out P is less than the width of the high density region 15 and the width of the low density region 14 in the transverse direction Y of the diaper 1 (garment) . Here, the width of the high density region 15 and the low density region 14 is not a length in the direction perpendicular to the direction E in which the high density regions 15 and the low density regions 14 extend, but represents the width of each region when it is measured in the transverse direction Y of diaper 1 (garment).

As described above, it is sufficient if there is a density difference between the low density regions 14 and the high density regions 15, at least in the state in which the outer coating 3 is stretched. This is due to the fact that at the stage of manufacturing the product, the side suture sections 4, as a rule, are formed at the stage of the side suture in a stretched state. Thus, the width of the high density region 15 and the width of the low density region 14 are measured in a state in which the outer coating 3 is stretched. Here, “stretched state” means a state where the stretchable disposable diaper 1 is stretched as a whole in the transverse direction Y and cannot be further stretched.

[0061]

{First way}

The width of the high density region 15, as well as the width of the low density region 14, is measured by observing the outer coating 3 in its natural state and in the aforementioned stretched state when magnified with a microscope, etc. More specifically, by observing the natural state and the stretched state, it becomes possible to study the high density region 15, which is similar to its natural state even in its stretched state, and the low density region 14, which contains less fibers in the stretched state than the high density region 15, and measuring the width of each area 15, 14 in the transverse direction Y of the garment. The width of the high density region 15, as well as the width of the low density region 14, is measured at ten points, and the measured values are averaged to calculate the width of the high density region 15 and the width of the low density region 14 of the outer coating 3.

The widths of the high density region 15 and the low density region 14 can be calculated using the second method described below.

{Second method}

Areas of high density are observed visually in their natural state, and markings are made in the transverse central section in each of the two adjacent areas of high density. As marking, a thin line is drawn in the longitudinal direction of each high density region, as illustrated in FIG. 12. thereafter, the pitch P3 between two points is measured (pitch P3 measured in the transverse direction Y of the garment; see FIG. 12) in a state in which the outer coating extends to its maximum tensile state. Half of the measured pitch P3 is considered as the width of the high density region, as well as the width of the low density region. The average value of the measured values obtained at five arbitrary points according to this method is considered as the width of the high-density region 15 and the width of the low-density region 14 of the outer coating 3. The advantages of this second method are manifested in those cases where the width of the high-density region 15 is almost the same, as the width of the low density region 14, as well as in those cases where the boundary between the high density region 15 and the low density region 14 cannot be precisely determined.

[0062]

Due to the fact that the length L4 of the fusion-connected section 40 is less than the width values of the high density region 15 and the low-density region 14, sections in which the high-density regions 15 have a fusion connection and sections in which low density regions 14 have a fusion joint, and thus the formation of sections having a high seam strength and sections having a low seam strength in the side seam section 4 is thus simplified. Thus, the side seam section 4 can It is easy to tear, separating the front side and the back side, and the seam strength can be reliably ensured so that an undesirable tear is not allowed during the wearing of the diaper, and which is sufficient for practical use.

[0063]

Furthermore, according to the present embodiment, as illustrated in FIG. 12, the high density regions 15 and the low density regions 14 extend alternately in the lateral suture section 4. Thus, the lateral suture section can more easily be torn, as along a cut line.

Preferably, three or more and more preferably five or more high density regions 15 are present in one side suture section 4, and preferably twenty or less and more preferably fifteen or less regions of high density 15, and preferably three to twenty and more preferably five to fifteen regions of high density 15 (the number of regions of low density 14 is determined similarly).

[0064]

The aforementioned diaper 1 can be manufactured by, for example, implementing the manufacturing method described below.

This method of manufacturing a diaper 1 includes a step of compressing or compressing a section 10c, on which a side suture section is to be formed in the continuous outer coating 3, and on which the outer coating on the front side of the body surface and the outer coating on the back side of the body surface are layered; and the step of forming a lateral suture section in which the lateral suture section 4 in the garment is formed by applying laser radiation to the aforementioned section, where the lateral suture section is to be formed, which is in a compressed state, and then the cutting and separation of the continuous outer coating 3 and connection by melting the trimmed edge sections of the layered outer coatings, which are formed by cutting / separation. This method also includes, before the compression step, the step of forming a continuous outer cover 3 and the step of fixing the body, in which the absorbent elements 2 are attached to the outer cover 3 (sheet of the outer layer 31, the sheet of the inner layer 32).

[0065]

More specifically, according to this manufacturing method of diapers 1, as illustrated in FIG. 9, in the compression step, by folding the ribbon-like outer coating 3 (sheets of the outer layer 31 and the sheets of the inner layer 32) in the direction of its width, the front side and the rear side of the ribbon-like outer coating 3 to which the absorbent elements 2 are attached, and thus, a “continuous strip of diapers 10 is obtained in which blanks of stretchable disposable diapers, in which there are no lateral suture sections formed therein, are connected continuously in one direction”. Thereafter, at the stage of forming the lateral suture section, as illustrated in FIG. 10, laser tape 30 acts on the ribbon-like outer coating 3 in a continuous strip of diapers 10, and it is cut and divided (melted and cut) into individual objects, and at the same time, the trimmed edge sections that are formed by cutting / separation in multiple layered outer coatings are fused 3 (sheets of the outer layer 31 and sheets of the inner layer 32), and as a result of this, stretchable disposable diapers 1 are continuously manufactured, each of which includes an outer rytie 3 having a pair of side seam sections 4, 4.

[0066]

More specifically, first, in the tine / groove machining step, each of the two sheets 31A ″, 31B ″ of the tape-like outer layer enters in such a way that it engages between the pair of tine / groove rollers 12A, 12B, and each of the sheets 31A ’ ', 31B' 'of the outer layer is machined on the teeth / grooves. As a result of this, sheets 31A, 31B of a ribbon-like outer layer are formed, each of which has alternately formed in the direction of movement low density regions that stretch to a large extent in the direction of travel, and high density regions that do not stretch in the direction of travel, or which stretch, but the degree of stretching is relatively small. In each of the sheets 31A, 31B of the outer layer, low-density and high-density regions extend in a direction perpendicular to the direction of movement.

According to the present embodiment, this stretching operation is carried out by using a stretching device 120 including pairs of teeth having grooves / grooves of the rollers 12A, 12B, each roller having teeth and grooves arranged alternately in the circumferential direction; the composite material is stretched in the direction of its movement, i.e. in the direction in which the elastic fibers 13 pass.

[0067]

It should be noted that in each pair of teeth / grooves of the rollers 12A, 12B, the teeth and grooves are formed alternately in the circumferential direction, and the rollers are combined so that the teeth on one tooth / groove of the roller 12A are freely inserted between the teeth on the other tooth / the grooves of the roller 12B, and the teeth on the other serrated / grooved roller 12B are freely inserted between the teeth on the first serrated / grooved roller 12A. In this state, the composite material in which the elastic fibers 13 are located between the sheets 11, 12 is inserted between the rollers 12A, 12B and is subjected to a stretching process so that it stretches in the direction in which the elastic fibers 13 pass.

[0068]

From the point of view of making a more visible pattern and making the side suture section, which is easier to tear after using the diaper, it is preferable to make a large thickness (i.e. the length in the circumferential direction of the roller) each tooth on the teeth / grooves of the rollers 12A, 12B, as well as the manufacture of a large amount of engagement (i.e., the maximum length of overlapping teeth on the teeth having grooves / grooves 12A, 12B), i.e. increase in tensile coefficient.

From the aforementioned point of view, the thickness of each tooth on the teeth / grooves of the rollers 12A, 12B is preferably 0.4 mm or more and more preferably 0.7 mm or more, and preferably 2.0 mm or less and more preferably 1.7 mm or less , and more specifically, preferably from 0.4 mm to 2.0 mm, and more preferably from 0.7 mm to 1.7 mm. In addition, from the same point of view, the tooth engagement amount on the teeth / grooves of the rollers 12A, 12B is preferably 1.0 mm or more and more preferably 1.5 mm or more, and preferably 4.0 mm or less and more preferably 3, 5 mm or less, and more specifically, preferably from 1.0 mm to 4.0 mm, and more preferably from 1.5 mm to 3.5 mm.

[0069]

Further, in the step of forming the continuous outer coating 3, the tape-shaped outer layer sheets 31A, 31B, 31C are integrated by connecting both side sections of the outer layer sheet 31C with the side section of each of the outer layer sheets 31A, 31B, and as a result, they form a wide ribbon-like sheet 31 outer layers. After that, as illustrated in FIG. 9, the numerous elastic elements of the 5 sections of the waist that form the assemblies on the waist and the numerous elastic elements of the 7 sections of the legs that form the assemblies on the legs are located in their stretched state in which they are stretched to a predetermined coefficient of stretching, between the continuously incoming sheet 31 of the outer ribbon layer and sheet 32 of the ribbon-like inner layer, which continuously come from the coil of the original textile material (not illustrated in the drawing). Here, the elastic elements of the 7 sections of the legs are arranged so that they form a predetermined pattern around the legs by means of a known rocking guide (not illustrated in the drawing), which performs a reciprocating movement in the perpendicular direction to change the direction of the sheets. In addition, before the sheet 31 of the ribbon-like outer layer and the sheet 32 of the ribbon-like inner layer are superimposed (layered), a hot-melt binder material is applied using a device for applying a binder material (not illustrated in the drawing) to predetermined surface sections (surfaces) of one or both sheets 31, 32. It should be noted that in cases where elastic elements, such as elastic elements 5 of the waist section, are located in their stretched state so that they intersect the section in sheets 31 32, which are to be cut and separated by means of laser radiation (ie, “the section where the lateral suture section 4 should be formed;” and the section to be cut and divided is illustrated by the conditional number 1 ° C in FIG. 11) it is preferable to apply a binder material to this section or its vicinity in order to eliminate disadvantages, such as loss or significant reduction of elastic elements after cutting / separation.

[0070]

After that, as illustrated in FIG. 9, when the sheet 31 of the ribbon-like outer layer and the sheet 32 of the ribbon-like inner layer, between which the elastic elements 5 of the waist section and the elastic elements of the 7 sections of the legs are located in their stretched state, pass between the pair of pressure rollers 110, 110 that compress the sheets, a continuous a ribbon-like outer coating 3, which includes numerous elastic elements 5, 7 located in their stretched state between the ribbon-like sheets 31, 32.

After that, if necessary, through the use of pre-cutting the elastic elements of the device (not illustrated in the drawing), the numerous elastic elements of the 7 sections of the legs are compressed in places corresponding to the locations of the above absorbent elements 2, and are cut and divided into numerous individual objects in this way that their compression function is not performed. An exemplary device that previously cuts the elastic elements includes a block cutting elastic elements used in the method of manufacturing composite elastic elements, as described in Japanese patent application JP 2002-253605 A.

[0071]

Further, as illustrated in FIG. 9, a binder material, such as a hot-melt binder, is applied in advance to each of the multiple absorbent elements 2 that were manufactured in a separate step, each absorbent element 2 rotates 90 degrees, and the absorbent elements 2 periodically arrive and are fixed on the sheet of the inner layer 32 which constitutes the ribbon-like outer coating 3 (casing fixing step). After that, as illustrated in FIG. 9, a leg hole LO 'is formed inside each annular section, which is surrounded by ring-shaped elastic elements 7 of leg sections in a ribbon-like outer cover 3 on which absorbent elements 2 are located. The step of forming leg openings can be carried out using a method / device similar to traditional methods / devices, such as a rotating knife or a laser knife, for the manufacture of this type of product.

[0072]

Next, the ribbon-like outer coating 3 is folded in the direction of its width (a direction perpendicular to the direction in which the outer coating 3 is moved). More specifically, as illustrated in FIG. 9, both side sections 3a, 3a in the direction of movement of the ribbon-like outer cover 3 are folded back so that they cover both end sections of each absorbent element 2 in its longitudinal direction and are fixed to the end sections in the longitudinal direction of the absorbent element 2 ', and after that the outer coating 3 is folded in half in the direction of its width together with absorbent elements 2 (stage overlapping (layering) at the stage of compression). Thus, a continuous strip of diapers 10 is obtained.

[0073]

Further, as illustrated in FIG. 10, a continuous strip of diapers 10 made in this way is exposed to laser radiation during the use of the laser coupler 20, and a pair of side suture sections 4, 4 is formed (the formation of side suture sections), and as a result stretchable disposable diapers 1 are continuously manufactured each of which has an outer coating 3 having a pair of lateral suture sections 4.

[0074]

Next, a laser coupler 20 will be described. As illustrated in FIG. 10, the laser coupler 20 includes a hollow cylindrical roller 23 that is rotated in the direction of arrow A; the irradiating head 25, which is located in the hollow section of the cylindrical roller 23 and which directs the laser beam 30 to the cylindrical (ring) support element 21, which forms a section of the peripheral surface of the cylindrical roller 23; and a belt-type pressure device 26, which includes an endless pressure belt 24 (pressure element).

The laser coupler 20 includes a tension control mechanism (not illustrated) that can increase / decrease and adjust the tension of the pressure tape 24, which is passed over the outer peripheral surface of the annular support member 21 (section of the peripheral surface of the cylindrical roller 23). By varying the tension, the pressure that is applied to the continuous strip of diapers 10 (laminated sheets) of the support member 21 and the pressure tape 24 can be adjusted accordingly.

[0075]

The supporting element 21 forms a section of the peripheral surface (a section that abuts the workpiece) of the cylindrical roller 23 and is located and fixed between the pair of annular ring frame elements 22, 22, from which the corresponding end sections of the cylindrical roller 23 are formed in the direction of rotation of its axis. The support member 21 constitutes a metallic material, such as iron, aluminum, stainless steel or copper, or a heat-resistant material, such as a ceramic material.

[0076]

The support member 21 has translucent sections 27 through which a laser beam can pass. As illustrated in FIG. 10, the support member 21 has, as translucent sections, slit-like openings 27 that penetrate the support member 21 in the thickness direction. Each hole 27 is a rectangle in a plan view, and its longitudinal direction coincides with a direction that intersects with the direction of movement A of the continuous strip of diapers 10 (ribbon-like outer cover 3), more specifically, this direction is parallel with respect to the axial direction of the axis of rotation of the cylindrical a roller 23, and numerous holes 27 are formed at predetermined intervals between them in the circumferential direction of the cylindrical support member 21. The support member 21 allows Let the laser beam pass through holes 27, but passing (passing) the laser beam is not possible in sections that are not holes 27. Methods for making holes 27 in support member 21 include: (1) a method for making holes 27, according to which, for example, etching, punching or laser processing in predetermined sections of the support element 21, which is a single annular element having the same length as the circumference of the annular frame elements 22; or (2) a method in which numerous curved rectangular elements are used as a supporting element 21 instead of a single annular element, and these elements are located between the pair of frame elements 22, and between them there are predetermined gaps in the circumferential direction of the frame elements 22. According to the method ( 2), the gap between two adjacent elements turns into a slit-like opening 27.

[0077]

In this laser coupler 20, the slit-like opening 27 that pierces the support member 21 in the thickness direction is a translucent section through which the laser beam can pass in the cylindrical roller 23. Thus, the continuous strip of diapers 10 that covers the opening 27, t .e. the cut-off / detachable section 10C is pressed by the clamping tape 24, but is not located between the support member 21 and the clamping tape 24 (clamping member). Thus, strictly speaking, the cut-off / detachable section 1 ° C is not affected by the clamping force created by placing between the elements 21, 24. Even though the cut-off / detachable section 10C, which covers the opening 27, is not located between the elements 21 , 24, its surroundings, i.e. sections of the continuous strip of diapers 10 that overlap the vicinity of the opening 27 are located between the elements 21, 24. Thus, the cut-off / detachable section 1 ° C does not move before and after exposure to laser radiation, and thus, the cut-off edge sections that are formed by cutting / separating a continuous strip of diapers 10 by means of laser radiation. In other words, the 1 ° C cut-off / detachable section in the continuous strip of diapers 10 is a section that limits the clamping force generated by the interposition between the elements 21, 24, and the clamping force actually acts on this section.

[0078]

The belt type pressing device 26 includes an endless pressure tape 24 (pressure element) and three rollers 25a, 25b, 25c that rotate in a state in which the pressure tape 24 is looped over them. The rollers 25a, 25b, 25c can be drive rollers that drive a power source, such as a motor, or they can be driven rollers that follow the rotation of the cylindrical roller 23. When one or more of the rollers 25a, 25b, 25c begin to rotate, or when the rollers follow the rotation of the cylindrical roller 23, the clamping tape 24 moves at the same speed as the cylindrical roller 23 (support member 21). It turns out that the support member 21 and the pressure strip 24 are in a predetermined temperature range by air cooling, water cooling, and the like.

[0079]

As the clamping tape 24 (clamping element) can be used made of metal or polymer tape having heat resistance, which is able to withstand the heat produced during processing, and, for example, it is possible to use a tape that makes up a metal material, such as iron, aluminum or stainless steel. In addition, as the clamping tape 24, as a rule, a tape is used that is not permeable to laser radiation directed onto the workpiece (ribbon-like outer coating 3), but instead a tape having such a permeability can be used.

[0080]

As illustrated in FIG. 10, an irradiation head 25 is located in the hollow section of the hollow cylindrical roller 23, which directs the laser beam 30 to the support element 21 forming a section of the peripheral surface of the cylindrical roller 23. The irradiation head 25 is a galvanic scanner (a device with a mirror on the motor shaft), which can provide free scanning of the laser beam 30 and includes, for example, a mechanism that causes the laser beam 30 to move forward and backward in a direction parallel to the axis of rotation of the cylindrical shaft ka 23; the mechanism by which it moves in the circumferential direction of the cylindrical roller 23, the position (point of irradiation), where the laser beam 30 enters a continuous strip of diapers 10 on the support element 21; and a mechanism that keeps the diameter of the spot of the laser beam 30 constant on the peripheral surface of the cylindrical roller 23. In this configuration, the laser irradiation mechanism can move the point of action of the laser beam 30 in a predetermined manner simultaneously in the circumferential direction of the cylindrical roller 23 and in a direction perpendicular to the circumferential direction.

[0081]

As illustrated in FIG. 10, a continuous strip of diapers 10 enters the outer surface of the support member 21, which forms a section of the peripheral surface of the cylindrical roller 23, rotated in the direction of arrow A, in a state in which a predetermined tension is applied to it by guide rollers, etc. (not illustrated in the drawing). The continuous strip of diapers 10 is then moved a predetermined distance by rotating the cylindrical roller 23 in its circumferential direction so that it passes over the supporting member 21. After that, the continuous strip of diapers 10 is separated from the supporting member 21 by exhaust rollers and pressure rollers (not illustrated in the drawing) ) Since the continuous strip of diapers 10 is moved so that it extends above the support member 21, which forms a section of the peripheral surface of the cylindrical roller 23, with a predetermined tension applied thereto and so that it is pressed against the pressure tape 24, sections of the continuous strip of diapers 10, which are located between the support element 21 and the clamping tape 24 and their surroundings are brought into a state in which they are compressed (compressed) in the thickness direction before they are cut and separated by means of laser irradiation. Thus, in cases where, for example, the continuous strip of diapers 10 includes a nonwoven fabric, the continuous strip of diapers 10 can be compressed more efficiently, and as a result, when the continuous strip of diapers 10 is in its compressed state, it is affected by laser radiation , it is cut and separated, and the trimmed edge sections of the multiple sheets (outer coatings 3) that make up the cut / separated section can be fused with greater reliability, increasing Braz, fusion bonding strength of the side seam sections 4.

[0082]

The angle at which the support element 21 (cylindrical roller 23) is rotated from the moment the continuous strip of diapers 10 enters the support element 21, until it is separated from it, can be, for example, from 90 degrees to 270 degrees inclusive and preferably from 120 degrees to 270 degrees inclusive. In addition, the angle range for pressing the continuous strip of diapers 10 in contact with the support member 21 of the pressing tape 24 is preferably 90 degrees or more and more preferably 120 degrees or more, and preferably 270 degrees or less and more preferably 270 degrees or less, and more specifically preferably from 90 degrees to 270 degrees inclusive and more preferably from 120 degrees to 270 degrees inclusive, and the case in which a cylindrical support element is pressed in contact with a continuous strip of diapers 10 ent 21 (cylindrical roller 23) all around in a circumferential direction of the circumference, is considered as 360 degrees.

[0083]

According to an embodiment, which is illustrated in FIG. 10, during continuous movement of the continuous strip of diapers 10, one surface 10a of the continuous strip of diapers 10 is adjacent to the outer surface of the support member 21, which forms a section of the peripheral surface of the cylindrical roller 23 and which has slit-like openings 27 (translucent sections) through which the laser beam can pass 30, and by irradiating a section 10c where lateral suture sections 4 are to be formed in a continuous strip of diapers 10, which is supported in a compressed state by the support element 21 and pressure tape 24 (pressure element), by means of a laser beam 30 passing through the hole 27 from the side of the support element 21, the continuous strip of diapers 10 is cut and divided, and at the same time, the trimmed edge sections that are formed as a result of cutting and separation into numerous sheets (outer coatings 3) in the aforementioned compressed state. Thus, the lateral suture sections 4 are obtained (the stage of formation of the lateral suture sections).

[0084]

FIG. 11 illustrates how a continuous strip of diapers 10 (ribbon-like laminate) is cut and separated, and side suture sections 4 are formed at the same time, each of which has a bonded edge section 41 by using a laser coupler 20. FIG. 11 (a) schematically illustrates a 1 ° C cut-off / detachable section (a section in which lateral suture sections 4 are to be formed) in a continuous strip of diapers 10 by means of laser radiation 30, as well as its surroundings. The cut-off / detachable section 1 ° C in the continuous strip of diapers 10 according to the illustrated embodiment is located in the center, in the longitudinal direction (direction of movement A) of the region in the continuous strip of diapers 10 in which there are no absorbent elements 2. The cut-off / detachable section 1 ° C comprises : having an eight-layer structure section, in which eight sheets are layered, in the end section of the hole for the waist 8 (see Fig. 1) and its surroundings; and having a four-layer structure section, in which four sheets are layered, in other sections. As illustrated in FIG. 11 (a) having a four-layer structure, the section consists of two sheets (a sheet of the outer layer 31 and a sheet of the inner layer 32) constituting a single outer cover 3 in the abdominal section 1A, and two sheets 31, 32 constituting a single outer cover 3 in the located on the back of section 1B, and the four layers are layered. On the other hand, in the section having an eight-layer structure, since both side sections 3a, 3a of the ribbon-like outer cover 3 are folded back so that they cover both end sections in the longitudinal direction of each absorbent element 2 during the manufacture of a continuous strip of diapers 10, as described above (see Fig. 9), two outer covers 3 are located in each of the abdominal sections 1A and the back sections 1B, and this means that the four outer covers 3, 3 are layered, and thus layered eight sheets 31, 32 are provided. It should be noted that both in the section having a four-layer structure and in the section having an eight-layer structure, elastic elements, such as elastic elements of the waist 5 section or elastic elements of the 7 foot sections, can be placed and placed between overlapping each other by sheets 31, 32. In the description below, a section having a four-layer structure is mainly considered, but unless another condition is defined having an eight-layer structure, the section is similar in structure to it having a four-layer structure and comprises a section formed therein seaming section 4 side.

[0085]

In a cut-off / detachable section having a four-layer structure of 1 ° C in a continuous strip of diapers 10, one or all sheets, including a sheet of the outer layer 31 of which one surface 10a (a surface adjacent to the support member 21) of the continuous strip of diapers 10 is made, and sheets (sheets of the inner layer 32) not constituting a sheet constituting the aforementioned single surface 10a are sheets that produce heat by absorbing laser radiation 30. According to the illustrated embodiment, ia, all four sheets 31, 32 that make up the cut-off / detachable section 10C are sheets (nonwoven webs) that produce heat by absorbing laser radiation 30, two sheets superimposed on each other, including a sheet of the outer layer 31 and the sheet of the inner layer 32, in the cut-off / detachable section 1 ° C and its surroundings can be connected by a binder material, etc., or they are not connected at all.

[0086]

As illustrated in FIG. 11 (b), a continuous strip of diapers 10 enters the support member 21, which rotates in the direction of arrow A, so that the aforementioned one surface 10a adjoins the support member 21, and the cut-off / detachable section 1 ° C (section in which lateral suture sections 4) are formed, located on the slit-like opening 27. In addition, the continuous strip of diapers 10 is compressed (compressed) in the direction of thickness as it moves in the direction of arrow A, since the pressing tape 24 presses the other surface 10b ( clamping element). After that, the cut-off / detachable section 10C, which moves in this compressed state, is irradiated by the laser beam 30 through the hole 27 from the side of the support member 21. As described above, the point of influence of the laser beam 30 is positioned so that it has the possibility of a predetermined movement in the circumferential direction a cylindrical roller 23, and is set so as to follow the movement of the hole 27 in the circumferential direction. Thus, during the movement, the cut-off / detachable section 10C located on the hole 27 is continuously irradiated by the laser beam 30 for a predetermined period of time. It turns out that the laser beam 30 moves in a direction that intersects the direction of travel of the continuous outer coating 3 and should extend in the longitudinal direction over the high density regions 15 and the low density regions 14 located alternately in a direction perpendicular to the direction of movement, thus that at one stage, sections are formed that are formed by fusion bonding of high density regions 15, and sections that are formed by bonding pla leniem low density regions 14.

[0087]

When a 1 ° C cut-off / detachable section having a four-layer structure is irradiated with a laser beam 30, the materials (fibers, etc.) that form the sheets 31, 32 in the cut-off / detachable section 10C produce heat as a result of direct exposure to the laser beam 30 and, thus, evaporate and disappear from the continuous strip of diapers. In this case, the aforementioned sheet forming materials in the vicinity of the cut-off / detachable section 1 ° C are indirectly heated by the laser beam 30 and melted. As a result of this, as illustrated in FIG. 11 (c) having a four-layer structure, the cut-off section 1 ° C is melted and cut, and thus the continuous strip of diapers 10 is cut and divided so that one multilayer sheet (blank of the diaper) is separated from the continuous strip of diapers 10, and at the same time by fusion, the trimmed edge sections of the four sheets 31, 32 in the separated multilayer sheet that is formed by cutting / separation, as well as the trimmed edge sections of the four sheets 31, 32 in a continuous strip of diapers 10, about t which separates the multilayer sheet. These trimmed edge sections are brought into a compressed state (squeezed state) when they are placed between the support member 21 and the pressure tape 24, even before they are formed (i.e. before the continuous strip of diapers 10 is cut and separated by means of laser radiation 30). According to the illustrated embodiment, in the method of manufacturing a diaper, cutting / separating the ribbon-like outer coating 3 and fusing the trimmed edge sections of the outer coating 3, which are formed in two places by cutting / separation and which are in a compressed state, are carried out simultaneously by a single exposure to laser radiation. Thus, in comparison with the methods in which two fusion joints are formed by double exposure to laser radiation, fusion bonding and cutting / separation can be carried out at the same stage with almost half the laser output, and thus, diapers 1 can be manufactured effectively .

[0088]

As illustrated in FIG. 11 (c), the cut off edge sections of the sheets 31, 32 are in a molten state due to heat generation during and immediately after the exposure to laser radiation 30. However, after the irradiation is stopped, the cut off edge sections are quickly cooled by ambient air and solidify, and the compressed state under the action of the reference element 21 and the pressure tape 24 is stored in a continuous strip of diapers 10, and one blank of the diaper is separated from the continuous strip of diapers 10 by exposure to a laser radiation 30. Thus, the cut edge sections in turn are connected by melting section 40, in which materials (fibers, etc.) from which the cut edge sections are formed, are melted and joined to each other. By forming a fusion-connected section 40, one side seam section is formed from a pair of side seam sections 4, 4 in one diaper 1. It should be noted that, if necessary, the trimmed edge sections of the sheets 31, 32 can be forcedly cooled using a known cooling device, such as a suction device or an air evacuation device to facilitate the formation of fusion-connected sections 40.

[0089]

After one 1 ° C cut-off / detachable section (the section in which the lateral suture sections 4 are to be formed) is cut and separated, the laser beam 30 is moved so that the corresponding irradiation point hits another hole 27 adjacent to the first hole, in the opposite direction with respect to the direction of movement A, and the laser beam 30 is directed through the aforementioned other hole 27 to another cut / detachable section 10C, which is located on it. Thus, this other 1 ° C cut-off / cut-off section is cut / separated and fused in the same manner, and another side suture section 4 (fusion-connected section 40) is formed, which is paired with the previously formed side suture section 4. Then repeated the same operation, and as a result of this, stretchable disposable diapers 1 are continuously manufactured, each of which has an outer cover 3 in which a pair of side suture sections 4, 4 are present.

[0090]

In order to form a strip pattern that is inclined with respect to the side suture sections 4, it is preferable to apply the laser radiation 30 by applying an outer coating 3 to the translucent section 27, which extends in a direction perpendicular to the direction in which the continuous outer coating 3, in a state in which regions of high density 15 and regions of low density 14 are inclined with respect to the translucent section 27.

In order for the high density regions 15 and low density regions 14 to be inclined with respect to the translucent section 27, various methods can be used, such as the method according to which, during the formation of a wide ribbon-like sheet of the outer layer 31 by joining together numerous sheets of the outer layer 31A , 31B, and 31C, sheets of the outer layer 31A, 31B, which include regions of high density 15 and regions of low density 14 extending in a direction perpendicular to the direction of movement, rast laminate by moving their one side section at a speed faster than the speed of moving their other side section, and as a result, an inclined orientation of the high density regions 15 and the low density regions 14 is formed, and then these sheets are connected to the outer layer sheet 31C in this state ; the method according to which, after the formation of openings for the legs, the Central section of the outer cover 3 in the direction of its width moves at a different speed than the speeds of both respective side sections, and as a result of this forms an oblique orientation of the areas of high density 15 and areas of low density 14; and a method according to which the teeth / grooves are machined in such a way that the high density regions 15 and the low density regions 14 are inclined with respect to a direction perpendicular to the direction of movement. However, not limited to the foregoing, you can use other various methods.

The diaper 1, comprising a pair of lateral suture sections 4, 4, which are obtained by the step of simultaneously cutting / separating and fusing the outer cover 3, has excellent softness and texture in the lateral suture sections 4 and is comfortable to wear. As a method for simultaneously cutting / separating and fusing the outer coating 3, it is possible to use a method according to which a heated cutting blade is pressed against a continuous outer coating 3 and the outer coating 3 is cut simultaneously with the fusion connection of the edge sections that are formed by cutting instead of the above method using laser radiation.

[0091]

Next, laser radiation will be described. Laser radiation that has such a wavelength that it is absorbed by the sheet (sheet of the outer layer 31; sheet of the inner layer 32) constituting the outer coating 3, and which causes the sheet to produce heat, is used as laser radiation, which is sent to a continuous strip of diapers 10 (ribbon-like outer coating 3). Here, the “sheet constituting the outer coating” is not limited to a sheet (for example, a sheet of the outer layer 31 according to the aforementioned embodiment), which is one surface (the surface that abuts the support member 21) of the outer coating, but it can be any sheet constituting the outer coating. The fact that the laser radiation that is directed onto the outer coating has such a wavelength that it is absorbed by each sheet constituting the outer coating and that it causes the sheet to produce heat is determined by the ratio between the sheet material and the wavelength of the used laser radiation. In those cases where non-woven webs or films made of synthetic polymer are present as the sheet constituting the outer coating, which are commonly used to make absorbent products (hygiene products), such as disposable diapers and sanitary napkins, it is preferable to use laser radiation, such as carbon dioxide lasers, YAG-based lasers (YAG), LED lasers (semiconductor lasers), lasers based on yttrium vanadate (YVO ₄₎ or olokonnye lasers. In those cases where the sheet constituting the outer coating includes, for example, polyethylene, polyethylene terephthalate or polypropylene as a synthetic polymer, it is preferable to use radiation whose wavelength is, for example, in the range from 8.0 μm to 15.0 μm inclusive , as radiation that can be absorbed by the sheet and cause the sheet to produce heat in a satisfactory manner. It turns out to be more preferable if the wavelength of the vibrations of the carbon dioxide laser when a high power laser device is present is from 9.0 μm to 11.0 μm inclusive. The diameter of the laser beam spot, the laser output power and other parameters can be selected accordingly, taking into account the material, thickness and other properties of the sheet constituting the outer coating.

[0092]

The present utility model has been described above according to the embodiments, but the present utility model can be modified accordingly without limiting the aforementioned embodiments.

[0093]

For example, a ribbon-like outer coating (multilayer sheet) can be made by layering two, three, five or more sheets instead of four sheets, as illustrated in FIG. 11 (a).

In addition, as illustrated in FIG. 3, the outer cover 3 according to the aforementioned embodiment (aspect) has a continuous hourglass shape formed by the abdominal section 1A, the crotch section 1C and the supine section 1B, and in which there is no separation between the abdominal section 1A and located on back section 1B. However, the outer cover according to the present utility model is not limited to the aforementioned continuous shape, and for example, an element of a sheet located on the abdomen, which is located on the abdomen (front side) of the user, and an element on the back of the sheet, which is on the back side, can be separated in it. (back of the user), and the absorbent element can be fixed so that it connects the elements of these two sheets. According to a method of manufacturing a stretchable disposable diaper that includes this type of separate outer coating, a compressed state is achieved in the compression step in the section where the side suture section should be formed in the ribbon-like outer coating having a structure in which the front side of the surface overlaps (ribbon-like sheet element on the side the abdomen) of a ribbon-like outer covering containing absorbent elements fixed on it, and the rear side of the surface (ribbon-like fox element the one on the side of the back).

[0094]

Furthermore, according to the aforementioned embodiment, before the aforementioned compression step, both side sections 3a, 3a in the direction of movement of the ribbon-like outer covering 3, i.e. the side sections in the direction of movement of the sheet 31 of the ribbon-like outer layer and the sheet 32 of the ribbon-like inner layer are folded back so that they cover both end sections of each absorbent element 2 in its longitudinal direction, as illustrated in FIG. 9. However, a sheet having a larger size in the width direction (a direction perpendicular to the longitudinal direction) than the sheet of the ribbon-like inner layer 32 can be used as the sheet 31 of the ribbon-like outer layer, and only the protruding section of the outer layer sheet 31 that extends outward from the side edge of the sheet 32 of the inner layer 32, when two sheets 31, 32 are stacked on top of each other, can be folded back so as to cover both end sections of each absorbent element 2 in its longitudinal a systematic way. In this case, the cut-off / detachable section 1 ° C of the continuous strip of diapers 10 comprises a six-layer structure section in which six sheets are layered in the end section of the waist opening 8 and its surroundings; and having a four-layer structure section, in which four sheets are layered, in other sections. Alternatively, both side sections 3a, 3a should not be folded in the direction of movement of the ribbon-like outer covering 3, i.e. side sections in the direction in which the sheet 31 of the ribbon-like outer layer and the sheet 32 of the ribbon-like inner layer move.

[0095]

In addition, in the drawable garment according to the present utility model, a stripes pattern on the front side F of the body surface and a stripes pattern on the rear side R of the body surface can be formed, taking, for example, the shapes that are illustrated in FIG. 13. In the example illustrated in FIG. 13 (a), the orientation of the stripes in the strip pattern on the front side F of the body surface is inclined with respect to the longitudinal direction of the side seam section and the direction perpendicular to it, but the orientation of the stripes in the strip pattern in the back side R of the body surface corresponds to the longitudinal direction of the side suture section 4. In the example illustrated in FIG. 13 (b), the angle of inclination of the strips in the strip pattern in the front side F of the body surface is different from the angle of inclination of the strips in the strip pattern in the back side R of the body surface. In the example illustrated in FIG. 13 (c), the outer coating in the abdominal section 1A includes a sheet having regions of high density 15 and the region of low density 14 and has a strip pattern, while the outer coating in the back section of 1B does not include a sheet having areas of high density 15 and areas of low density 14, and are missing here have a striped pattern. In the example illustrated in FIG. 13 (d), the outer coating in the back section 1B includes a sheet having a high density region 15 and a low density region 14 and has a strip pattern, while the outer coating in the abdominal section 1A does not include a sheet having areas of high density 15 and areas of low density 14, and there is no pattern in stripes.

[0096]

In addition, the sheet of outer layer 31C may be a sheet in which tensile ability is present or absent. In addition, the sheet of the outer layer 31C may not be present in the sheet of the outer layer 31, and the sheet of the outer layer 31 may comprise only the sheet of the outer layer 31A and the sheet of the outer layer 31B. Alternatively, the sheet of outer layer 31 may be a single sheet.

[0097]

In addition, the stretchable garment according to the present utility model is not limited to the stretchable disposable diaper, and may be, for example, a stretchable sanitary napkin or a diaper cover that includes an outer cover forming an outer surface of the garment but without an absorbent element.

Distinctive features according to certain embodiments that have not been described, or distinguishing features specific to specific embodiments only, may be considered applicable to other embodiments, and features according to various embodiments are interchangeable with respect to the embodiments, as far as appropriate .

[0098]

With respect to the above-mentioned embodiments (aspects) of the present utility model, the following additional conditions are described (pull-on garments).

[0099]

<1> A stretchable garment comprising an outer cover that forms the outer surface of the garment in which a pair of side seam sections, a waist hole and a pair of leg holes are formed when both side edge sections of the outer cover on the front side of the body and both side edge sections of the outer coating on the back of the body, wherein:

at least one coating of the outer coating on the front side of the body and the outer coating on the back side of the body includes a sheet having regions of high density and regions of low density alternating and parallel to each other, wherein regions of high density and low density create a striped pattern on the surface that forms the outer surface of the garment;

at least one of the side suture sections includes a bonded edge section, which is formed by connecting the edge section of the outer coating on the front side of the body and the edge section of the outer coating on the back side of the body through a fused section that runs in a continuous linear shape in the longitudinal direction side suture section; in a cross section that is perpendicular to the direction in which the side suture section extends, the length of the fused section from the inside to the outside, which is the direction from the side closer to the skin of the wearer of the garment to the side further from the skin, less than the width of the high density region and the width of the low density region in the transverse direction of the garment; and

in the strip pattern, the direction in which the strips pass is oblique with respect to the longitudinal direction of the side seam section and the direction perpendicular to it.

[0100]

<2> A stretchable garment according to condition <1>, in which the high-density and low-density regions extend alternately in the longitudinal direction of the side seam section.

<3> A stretchable garment according to condition <1> or <2>, in which there is a density difference between the low density region and the high density region, at least in the stretched state.

<4> A stretchable garment according to any one of the conditions <1> to <3>, wherein the sheet is a sheet having a tensile ability.

<5> A stretchable garment according to any one of the conditions <1> to <3>, wherein the sheet is a stretch composite sheet including a stretch sheet and a non-stretch sheet that is layered on the stretch sheet.

<6> A stretchable garment according to condition <5>, in which the stretch sheet and the non-stretch sheet are connected to each other on respective opposite surfaces; and the stretchable composite sheet generally has the ability to stretch at least in a direction perpendicular to a predetermined direction E in which regions of high density and region of low density pass.

<7> A stretchable garment according to condition <5> or <6>, in which the stretchable composite sheet contracts in its natural state; and numerous first long narrow bulges that extend in a predetermined direction E, in which high density and low density regions extend, are formed on the surface on the side of the non-stretch sheet, a region in which the stretch sheet and the non-stretch sheet are joined over almost the entire area of the region .

<8> A stretchable garment according to any of the conditions <5> to <7>, in which numerous second long narrow bulges, each of which has a lower height than the height of the first long narrow bulge, are formed on the surface from the side of the stretch sheet.

<9> A stretchable garment according to any one of the conditions <5> to <8> in which the stretchable composite sheet is capable of stretching in a direction D perpendicular to a predetermined direction E in which regions of high density and low density are passed, until until the non-stretch sheet becomes almost flat; and in this state the first long narrow bulges disappear.

<10> A stretchable garment according to any one of the conditions <5> to <9>, wherein the stretchable sheet includes first regions having elasticity and tensile ability, and second regions having lower tensile properties than the first regions; moreover, the first and second regions are formed so that they extend in a predetermined direction E, in which regions of high density and low density regions pass, and are formed alternately in a direction D perpendicular to a predetermined direction E.

<11> A stretchable garment according to any one of the conditions <5> to <10>, in which a stretch sheet is formed when multiple elastic fibers are joined to the stretch nonwoven web so that they extend in the same direction without intersecting each other moreover, the elastic fibers are attached to the stretchable nonwoven fabric throughout its entire length in a practically unstretched state.

[0101]

<12> A stretchable garment according to any one of the conditions <1> to <11>, in which, in a cross section that is perpendicular to the direction in which the lateral suture section extends, when the garment is worn, a fastened edge section in the lateral the suture section has a shape in which the outer edge, which is formed by the fusion-connected section, is deepened toward the inside of the stretchable garment.

<13> A stretchable garment according to any one of the conditions <1> to <12> in which, in a cross section that is perpendicular to the direction in which the lateral suture section extends, is a small width W4 of a fusion-connected section that is in a bonded edge section in a side seam section that is on the outer surface of the stretchable garment, the width W4 being preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less.

<14> A stretchable garment according to any one of the conditions <1> to <13>, wherein, in the cross-sectional image in the transverse direction Y of the stretchable garment, the width of the fusion-connected section gradually increases as it approaches its central section in the thickness direction.

<15> A stretchable garment according to any one of the conditions <1> to <14>, wherein the outer cover on the front side of the body and the outer cover on the back side of the body include elastic elements of the waist section that form assemblies at the waist, or elastic elements of the hip section that form the assemblies on the hip; and the elastic elements of the waist section or the elastic elements of the hip section are fixed with a binder between the sheets that make up each of the outer coatings located on both sides of the side suture section.

<16> A stretchable garment according to any of the conditions <1> to <15>, wherein the outer coating on the front side of the body and the outer coating on the back side of the body in each case has a striped pattern; and the directions in which the strips in the respective stripe patterns on both sides of the side seam section are distinguished are distinguished.

<17> A stretchable garment according to any of the conditions <1> to <15>, in which the outer coating on the front side of the body and the outer coating on the back side of the body in each case has a striped pattern; and the direction of the stripes in the strip pattern in the front side of the body surface is inclined with respect to the longitudinal direction of the side suture section and the direction perpendicular to it, while the direction of the stripes in the strip pattern in the back side of the body surface is the longitudinal direction of the side suture section .

[0102]

<18> A stretchable garment according to any of the conditions <1> to <15>, in which the outer coating on the front side of the body and the outer coating on the back side of the body in each case has a striped pattern; and the angle of inclination of the strips in the striped pattern on the front side of the body surface is different from the angle of inclination of the strips in the striped pattern on the back side of the body surface.

<19> A stretchable garment according to any one of the conditions <1> to <15>, wherein the outer cover in the abdomen section includes a sheet having high density and low density regions and has a strip pattern, while in the outer the coatings on the back section are missing include a sheet having areas of high density and areas of low density, and there is no strip pattern.

<20> A stretchable garment according to any one of the conditions <1> to <15>, wherein the outer coating in the back section includes a sheet having high density and low density regions and has a strip pattern, while in the outer the coating in the abdominal section is missing a sheet having a high density region 15 and a low density region 14, and there is no strip pattern.

<21> A stretchable garment according to any of the conditions <2> to <20>, in which preferably three or more, and more preferably five or more, high density regions are located in the side suture section (similarly for the number of low density regions).

<22> A stretchable garment according to any of the conditions <2> to <21> in which there are preferably twenty or less and more preferably fifteen or less high density regions located in the side suture section (similarly for the number of low density regions).

<23> A stretchable garment according to any one of the conditions <1> to <22>, wherein the sheet having regions of high density and regions of low density, alternating and parallel to each other, is a sheet in which the tensile capacity is created or increases by machining on the teeth / grooves.

<24> A stretchable garment according to any one of the conditions <1> to <23>, wherein the length of the fusion-connected section from the inside out is 2.5 mm or less.

<25> A method of manufacturing a stretchable garment according to any of the conditions <1> to <24>, the method comprising:

the stage of formation of the side suture section, on which the side suture section in the garment is formed by applying laser radiation to the section where the side suture section should be formed in the continuous outer coating, in which the outer coating on the front side of the body surface and the outer coating on the back side of the surface are layered body, and then cutting and separation of the continuous outer coating and fusion of the trimmed edge sections of the layered outer coatings, to orye formed by cutting / separation, wherein

at the stage of formation of the lateral suture section, laser radiation is applied by introducing a continuous outer coating into the translucent section, which extends in a direction perpendicular to the direction in which the continuous outer coating is moved, wherein the continuous outer coating is introduced in a state in which high density regions and low density regions are inclined with respect to the translucent section.

<26> A method of manufacturing a stretchable garment according to any of the conditions <1> to <24>, the method comprising:

a compression step in which a section is brought into a compressed state where a side seam section is to be formed in a continuous outer coating, in which the outer coating on the front side of the body surface and the outer coating on the back side of the body surface are layered; and

the stage of formation of the lateral suture section, on which the lateral suture section in the garment is formed by means of laser radiation on the section where the lateral suture section is to be formed, and which is in a compressed state, and then the cutting and separation of the continuous outer coating and fusion of the trimmed edge sections of layered outer coatings that are formed by cutting / separation, and

at the stage of formation of the lateral suture section, laser radiation is applied by introducing a continuous outer coating into the translucent section, which extends in a direction perpendicular to the direction in which the continuous outer coating is moved, wherein the continuous outer coating is introduced in a state in which high density regions and low density regions are inclined with respect to the translucent section.

<27> A method of manufacturing a stretchable garment according to condition <25> or <26>, wherein, during the formation of a wide ribbon-like sheet, which constitutes a continuous outer coating, when multiple ribbon-like sheets are joined together, one of the ribbon-like sheets, which include areas of high density and areas of low density extending in a direction perpendicular to the direction of movement are stretched by moving one side section of the ribbon-like sheet with a higher Oka speed than moving it to another side section, and thereby orientation is inclined regions of high density and regions of low density, and the band-shaped sheet in this state is connected to another band-shaped sheet.

<28> A method of manufacturing a stretchable garment according to condition <25> or <26>, in which, after the formation of leg openings in a continuous outer covering, the central section of the outer covering in its width direction moves at a different speed than the speeds of both respective side sections , and as a result, the orientation of the high density and low density regions is oblique.

<29> A method of manufacturing a stretchable garment according to any of the conditions <25> - <28>, in which it is preferable that the wavelength of the laser radiation is 8.0 μm or more; and it is more preferred that the wavelength of the carbon dioxide laser when a high power laser device is present is 9.0 μm or more.

<30> A method of manufacturing a stretchable garment according to any of the conditions <25> - <29>, in which it is preferable that the wavelength of the laser radiation is 15.0 μm or less; and it is more preferable that the wavelength of the carbon dioxide laser when a high power laser device is present is 11.0 μm or less.

[0103]

<31> A method of manufacturing a stretchable garment according to any of the conditions <25> - <30>, in which:

a stretch sheet obtained by the stage in which the sheet is introduced into the stretching process when the sheet is moved so that it engages between the pair of serrated / grooved rollers, or the stretch composite sheet obtained when the stretch sheet and another sheet are joined at their opposite surfaces used as one or both of the outer coating on the front side of the body surface and the outer coating on the back side of the body surface; and

the thickness of each tooth in a pair of serrated / grooved rollers is preferably 0.4 mm or more and more preferably 0.7 mm or more, and preferably 2.0 mm or less and more preferably 1.7 mm or less, and more particularly preferably from 0.4 mm to 2.0 mm and more preferably from 0.7 mm to 1.7 mm.

<32> A method of manufacturing a stretchable garment according to any of the conditions <25> - <31>, in which:

a stretch sheet obtained by the stage in which the sheet is introduced into the stretching process when the sheet is moved so that it engages between the pair of serrated / grooved rollers, or the stretch composite sheet obtained when the stretch sheet and another sheet are joined at their opposite surfaces used as one or both of the outer coating on the front side of the body surface and the outer coating on the back side of the body surface; and

the gear engagement value of the pair of serrated / grooved rollers is preferably 1.0 mm or more and more preferably 1.5 mm or more, and preferably 4.0 mm or less and more preferably 3.5 mm or less, and more particularly preferably 1.0 mm to 4.0 mm and more preferably 1.5 mm to 3.5 mm.

<33> A stretchable garment made by a manufacturing method according to any of the conditions <25> - <32>.

Industrial applicability

[0104]

The stretchable garment according to the present utility model includes lateral suture sections that are soft and which only slightly protrude from the outer surface of the garment, and which also have excellent tearing tendency and sufficient bond strength for practical use.

Using the manufacturing method of the stretchable garment according to the present utility model, it is possible to efficiently produce the stretchable garment.

Claims (26)

1. A stretchable garment comprising an outer cover that forms the outer surface of the garment, wherein a pair of side seam sections, a waist hole and a pair of leg openings are formed by connecting both side edge sections of the outer cover on the front side of the body and both side edge sections of the outer coatings on the back of the body, with: at least one of the outer coating on the front of the body and the outer coating on the back of the body includes a sheet having regions of high density and regions of low density alternating and parallel to each other, wherein regions of high density and low density create a striped pattern on the surface that forms the outer surface of the garment; at least one of the side suture sections includes a bonded edge section formed by connecting the edge section of the outer cover on the front side of the body and the edge section of the outer cover on the back side of the body through a fused section that runs along a continuous line in the longitudinal direction of the side suture sections; wherein, in a cross section that is perpendicular to the direction in which the side seam section extends, the length of the fusion-connected section is from the inside to the outside, which is the direction from the side closer to the skin of the wearer of the garment to the side further from skin less than the width of the high density region and the width of the low density region in the transverse direction of the garment; and in the strip pattern, the direction in which the strips pass is oblique with respect to the longitudinal direction of the side suture section and to the direction perpendicular to the longitudinal direction of the side suture section. 2. A stretchable garment according to claim 1, wherein the high-density and low-density regions extend alternately in the longitudinal direction of the side suture section. 3. The stretchable garment according to claim 1, wherein there is a difference in density between the low density region and the high density region, at least in the stretched state. 4. A stretchable garment according to claim 1, wherein the sheet is a sheet having a tensile ability. 5. A stretchable clothing item according to claim 1, wherein the sheet is a stretchable composite sheet including a stretchable sheet and a stretchable sheet that is layered on a stretchable sheet. 6. A stretchable garment according to claim 5, in which the stretch sheet and the non-stretch sheet are connected to each other on respective opposite surfaces; and the stretchable composite sheet generally has the ability to stretch at least in a direction perpendicular to a predetermined direction in which the high density and low density regions pass. 7. A stretchable garment according to claim 5, wherein the stretchable composite sheet is compressed in its natural state; and numerous first long narrow bulges that extend in a predetermined direction in which the high density and low density regions extend are formed on the surface on the side of the non-stretch sheet, a region in which the stretch sheet and the non-stretch sheet join substantially over the entire area area. 8. The stretchable garment according to claim 7, in which numerous second long narrow bulges, each of which has a lower height than the height of the first long narrow bulge, are formed on the surface from the side of the stretch sheet. 9. The stretchable garment according to claim 5, wherein the stretchable composite sheet is capable of stretching in a direction perpendicular to a predetermined direction in which the high density and low density regions extend until the stretchable sheet becomes substantially flat; and in this state the first long narrow bulges disappear. 10. The stretchable garment according to claim 5, in which the stretchable sheet includes first areas having elasticity and tensile ability, and second areas having less stretching ability than the first areas; and the first regions and second regions are configured to extend in a predetermined direction in which the high density and low density regions extend, and are alternately formed in a direction perpendicular to said predetermined direction. 11. The stretchable clothing item according to claim 5, in which the stretchable sheet is formed by attaching to the stretchable nonwoven fabric numerous elastic fibers that extend in the same direction without intersecting with each other, the elastic fibers attached to the stretchable nonwoven fabric along its entire length in being unstretched. 12. The stretchable garment according to claim 1, in which, in a cross section that is perpendicular to the direction in which the side suture section extends, the width W4 of the fusion-connected section, which is in the fastened edge section in the side suture section, which located on the outer surface of the stretchable garment, is 5 mm or less. 13. The stretchable garment according to claim 1, wherein, in a cross-section that is perpendicular to the direction in which the side suture section extends, the width W4 of the fusion-connected section, which is in the fastened edge section in the side suture section, which visible on the outer surface of the stretchable garment, is 2 mm or less. 14. The stretchable garment according to claim 1, in which, in a cross section made in the transverse direction Y of the stretchable garment, the width of the fused section gradually increases as it approaches its central sections in the direction of thickness. 15. A stretchable garment according to claim 1, wherein both the outer coating on the front side of the body and the outer coating on the back side of the body have a striped pattern; and the directions in which the strips in each stripe pattern go are different on both sides of the side seam section. 16. A stretchable garment according to claim 1, in which both the outer coating on the front side of the body and the outer coating on the back side of the body have a striped pattern; and the angle of inclination of the strips in the strip pattern in the front side of the body surface is different from the angle of inclination of the strips in the strip pattern in the back side of the body surface. 17. A stretchable garment according to claim 2, in which there are three or more areas of high density located in the side suture section. 18. A stretchable garment according to claim 2, in which there are five or more areas of high density located in the side suture section. 19. A stretchable garment according to claim 2, in which there are twenty or less areas of high density located in the side suture section. 20. A stretchable garment according to claim 2, in which there are fifteen or less areas of high density located in the side suture section. 21. The stretchable clothing item according to claim 1, in which the sheet having areas of high density and areas of low density, passing alternately and parallel to each other, is a sheet whose tensile ability is created or increased by processing to form protrusions / recesses . 22. A stretchable garment according to claim 1, in which the length of the fused section in the direction from the inside out is 2.5 mm or less.

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