JP7129175B2 - Upper body disposable swimwear - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disposable swimsuit for the upper body that is excellent in preventing slippage during wear.

Currently, disposable swimsuits (also called swimming pants) intended for use in infant pools and the like are commercially available. This disposable swimsuit is for the lower body and is intended to prevent excreta such as urine and feces from diffusing into the water (see Patent Documents 1 and 2, for example).

On the other hand, for girls, an upper-body disposable swimsuit that hides the breasts has been proposed to emphasize femininity (Patent Document 3).

However, conventional upper-body disposable swimsuits tend to slip up due to body movements during wearing, especially when the arms are frequently raised and lowered during water play and swimming.

JP 2005-296372 A Japanese Unexamined Patent Application Publication No. 2005-537 JP 2009-84735 A

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a disposable swimsuit for the upper body that suppresses slipping up during use.

A disposable swimsuit for the upper body that solves the above problems is as follows.

<First Aspect>
Equipped with a front body covering the front part of the upper body and a back body covering the rear part of the upper body,
A torso opening formed in the lower part, a neck opening formed in the upper part, a pair of shoulders positioned on both sides in the width direction of the neck opening, a pair of arm openings opening to the sides of the pair of shoulders, and lower ends of the arm openings Having a waist portion located between the width direction imaginary line passing through and the waist opening,
On both sides of the torso part, there are side seal parts where the joints between both sides of the front body and both sides of the back body are arranged,
An elastic region that elastically expands and contracts in the width direction is provided on the inner side of the side seal portion in at least one of the front body and the back body in the width direction.
A disposable swimsuit for the upper body,
At least part of the range in the front-rear direction of the waist portion has an elastic region, and is a space reduction portion in which the width direction space between the left and right side seal portions narrows stepwise or continuously toward the side of the waist opening. be,
A disposable swimsuit for the upper body, characterized by:

(Effect)
In this upper-body disposable swimsuit, the waist size is determined by the widthwise interval between the left and right side seal portions. In other words, the space reduction portion of the present upper-body disposable swimsuit has an elastic region and a portion where the waist circumference dimension becomes tighter in a stepwise or continuous manner toward the waist opening side. With such a reduced interval portion, even if a force is applied to the disposable upper body disposable swimsuit while wearing it, the reduced interval portion is in tighter contact with the skin. It acts as a resistance, and slippage is suppressed.

<Second Aspect>
Above the space decreasing portion, there is a space increasing portion where the space between the left and right side seal portions in the width direction widens toward the body opening side.
A disposable swimsuit for upper body according to the first aspect.

(Effect)
In this case, the change in the size of the waist portion in the front-rear direction is close to that of a child's body, which is preferable because the effect of suppressing slipping up is further improved.

<Third Aspect>
The interval change rate in the interval decreasing portion is 8 to 31%,
A disposable swimsuit for the upper body according to the first or second aspect.

(Effect)
Although the extent of the interval change in the interval decreasing portion can be determined as appropriate, it is preferably within this range in normal cases.
Note that the gap change rate is defined by the following formula (1), where Dmax is the maximum value of the gap in the width direction, Dmin is the minimum value of the gap in the width direction, and Z is the length of the side seal portion in the front-rear direction. It is determined.
{(Dmax−Dmin)/Z}×100 (1)

<Fourth Aspect>
The left and right side seal portions are composed of a main side seal portion positioned on the outermost side in the width direction and extending over the entire length of the waist in the front-rear direction, and a portion positioned on the inner side in the width direction of the main side seal portion to reduce the gap. Auxiliary side seal portions provided only in the
The widthwise interval between the left and right side seal portions in the portion having the auxiliary side seal portion is narrower than the widthwise interval between the left and right side seal portions in the portion not having the auxiliary side seal portion.
A disposable swimsuit for the upper body according to any one of the first to third aspects.

(Effect)
Side seals can also be provided obliquely to form the reduced spacing, which can consist of a single continuous joint or a row of joints. In this case, however, large surplus portions of the front body and the back body remain separately outside the side seal portions at the portion where the interval is reduced, resulting in an unattractive appearance. Although this surplus portion can be cut off, waste material is generated. On the other hand, when the main side seal portions and the auxiliary side seal portions are provided as in this aspect, although the surplus portions of the front body and the back body remain outside the side seal portions, they are covered by the main side seal portions. Since it is bonded, the appearance does not deteriorate as compared with the non-bonded case. Furthermore, this surplus part can also be used as a knob when pulling down this upper body disposable swimsuit (if the surplus parts of the front body and the back body are left separately, if only one of them is pulled, (The main side seal may come off.)

<Fifth Aspect>
The auxiliary side seal portions are provided in one row or in multiple rows at intervals in the width direction,
The junction of each auxiliary side seal is detachable,
A disposable swimsuit for the upper body of the fourth aspect.

(Effect)
If the joining portion of the auxiliary side seal portion can be peeled off in this way, for example, when the auxiliary side seal portions are arranged in a row, the user can select whether or not to peel off the auxiliary side seal portion. It is possible to select whether or not there is an uplink suppression function. In addition, when there are multiple rows of auxiliary side seals, the user can peel off only some rows of the auxiliary side seals according to the size of the wearer's body, thereby reducing the waist circumference at the reduced interval. You can adjust the tightness of the

<Sixth Aspect>
A gathered elastic member is provided on the shoulder portion along the front-rear direction,
At least part of the shoulder shrinks in the front-rear direction due to contraction of the gathers elastic member, and can extend in the front-rear direction together with the gathers elastic member.
A disposable swimsuit for the upper body according to any one of the first to fifth aspects.

(Effect)
In this upper-body disposable swimsuit, at least a part of the shoulder shrinks in the front-rear direction due to the contraction of the gathering elastic member, and can be stretched in the front-rear direction together with the gathering elastic member, so that the structure is very simple. However, the fit of the shoulder is improved.

ADVANTAGE OF THE INVENTION According to this invention, the advantage of being able to suppress the shifting up at the time of use etc. is brought about.

FIG. 4 is a plan view showing the inner surface of the upper body disposable swimsuit in an unfolded state; Fig. 10 is a plan view showing the outer surface of the upper body disposable swimsuit in an unfolded state; 3 is a cross-sectional view taken along line 3-3 of FIG. 1; FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1; FIG. (a) 5-5 cross-sectional view of FIG. 1, (b) 6-6 cross-sectional view of FIG. 1, (c) and 7-7 cross-sectional view of FIG. 1 is a perspective view of the front side of a disposable swimsuit for the upper body; FIG. 1 is a perspective view of the back side of the upper-body disposable swimsuit. FIG. 4(a) and 4(b) are both front views schematically showing a mounted state. FIG. (a) A front view schematically showing a disposable swimsuit for the upper body in an unfolded state, (b) an enlarged view of the Q portion, and (c) an enlarged view of the Q portion in another example. 4(a) and 4(b) are both plan views showing the inner surface of the interior body in the unfolded state. FIG. FIG. 2 is a cross-sectional view corresponding to the 3-3 cross section of FIG. 1; FIG. 2 is a cross-sectional view corresponding to the 4-4 cross section of FIG. 1; FIG. 2 is a cross-sectional view corresponding to the 3-3 cross section of FIG. 1; FIG. 2 is a cross-sectional view corresponding to the 4-4 cross section of FIG. 1;

The upper body disposable swimsuit will be described in detail below with reference to the accompanying drawings. Figures 1-7 show a disposable upper body swimsuit. This upper-body disposable swimsuit includes a front body F covering the front part of the upper body, a back body B covering the rear part of the upper body, and a body opening WO formed in the lower part, a neck opening NO formed in the upper part, and a neck opening. A pair of shoulders S positioned on both sides in the width direction WD, a pair of arm openings AO opening to the sides of the pair of shoulders S, and a virtual line in the width direction WD passing through the lower ends of the arm openings AO and the waist opening WO. It has a torso portion T located therebetween.

As shown in FIG. 6 and FIG. 7 in addition to FIG. 1, it is one preferred form that the shoulder portion S is provided with a gathered elastic member 63 along the front-rear direction LD. At least a portion of the shoulder portion S is contracted in the front-rear direction LD due to the contraction of the gathers elastic member 63 and is expandable in the front-rear direction LD together with the gathers elastic member 63 . As a result, this disposable swimsuit for the upper half of the body has a very simple structure, but the fit of the shoulders S is good.

The structure of each part is not particularly limited. The illustrated example is preferable in that the technology for manufacturing pants-type disposable diapers can be used. That is, the illustrated upper-body disposable swimsuit includes an outer body 100 forming the outer surface (back side) of the product, and an inner body 200 attached to the outer body 100 . Symbol Y indicates the total length of the product in the unfolded state (the length in the longitudinal direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the symbol X indicates the total width of the product in the unfolded state. is shown.

Each component is joined to an adjacent member on at least one of the front and back sides as required. The joining between the members can be performed by a hot-melt adhesive applied to either one or both members. A dot pattern portion in the cross-sectional view indicates a hot-melt adhesive as a bonding means for bonding each component located on the front side and the back side. The hot melt adhesive is applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral or Z-shaped spray coating, or pattern coating (transfer of hot melt adhesive by letterpress method). can be applied. Alternatively or additionally, at the fixing portion of the elastic member, a hot melt adhesive can be applied to the outer peripheral surface of the elastic member to fix the elastic member to the adjacent member. Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), olefin-based, and polyester-polyamide-based adhesives, and can be used without particular limitation. As a joining means for joining each constituent member, a means by material welding such as heat sealing or ultrasonic sealing can be used.

(Exterior body)
The outer body 100 extends from the front body F to the back body B through a pair of shoulders S located on both sides in the width direction WD of the neck opening NO. B has side seal portions 13 joined to both side portions of the exterior body 100 respectively. 6 and 7, the formation of the side seal portions 13 forms a body opening WO at the lower portion, a neck opening NO at the center of the upper portion in the width direction WD, and a pair of shoulder portions S. A pair of arm openings AO are formed that open to the sides of the .

The outer body 100 includes a waist circumference portion T defined as a front-back direction range from the waist opening WO to the lower ends of the arm openings AO, and a front-back direction range of the portion forming the arm openings AO (front and back portions having the side seal portions 13 of the front body F). and a middle portion M defined as a direction region and a front-rear direction region of the back body B having the side seal portions 13 . The waist portion T can be conceptually divided into a “lower waist portion” W that forms the edge of the waist opening and a “chest portion” U that is above this. Normally, when there is a boundary where the stretching stress in the width direction WD changes in the waist circumference portion T (for example, the thickness or elongation rate of the elastic member changes), the waist is closer to the waist opening WO side than the boundary closest to the waist opening WO side. If there is no such boundary, the lower end portion W will be the portion extending from the inner body 200 toward the trunk opening WO side. These dimensions in the front-rear direction LD differ depending on the size of the product and can be determined as appropriate. For example, the waist lower end W can be 15 to 40 mm, and the chest U can be 65 to 120 mm.

Both side edges of the intermediate portion M of the exterior body 100 are constricted in a U-shape or a curved line along the circumference of the wearer's arm. The degree of constriction of the exterior body 100 can be determined appropriately, and in order to have a neat appearance, it is preferable that the width of the exterior body 100 is narrower than the width of the interior body 200 at the narrowest portion. The width of the narrow portion may be equal to or greater than the width of the inner body 200 .

Although not shown, the outer body 100 is separately provided on the front body F and the back body B, and these are spaced apart in the front-rear direction LD as necessary, and the front outer body 100 and the rear outer body 100 are attached via the inner body 200. Bodies 100 can also be connected.

The exterior body 100 can also be formed of a single sheet layer. However, in order to improve fit, it is preferable to incorporate the elastic members 15 to 19 into the exterior body 100 as will be described later. In addition, it may be difficult to secure rigidity with a single layer, or different materials may be used for the inner surface and the outer surface. Therefore, as shown in FIGS. 1 to 5, the exterior body 100 preferably has a laminated structure in which the outer sheet layer 12S and the inner sheet layer 12H are bonded together. The sheet material forming the outer sheet layer 12S and the inner sheet layer 12H may be a common sheet material, or may be individual sheet materials. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12S are formed by the inner portion and the outer portion of a single sheet material folded back at the edge of the waist opening WO or the like in part or all of the exterior body 100. formed respectively. The former mode has the advantage that the number of sheet materials is small, and the latter mode has the advantage that the inner sheet layer 12H and the outer sheet layer 12S are less likely to be misaligned when they are bonded together. The illustrated example corresponds to the latter. The sheet material forming the inner sheet layer 12H extends only to the edge of the waist opening WO, but the sheet material forming the outer sheet layer 12S extends only to the inner sheet layer 12H. The waist side edge of the sheet material is wrapped around and folded back inward. Further, this folded portion serves as a cover sheet layer 12r that extends over the entire width direction WD of the exterior body 100 to a position where it overlaps the end portion of the interior body 200 on the waist opening WO side. Instead of forming the cover sheet layer 12r by folding the sheet material of the outer sheet layer 12S, a dedicated sheet material may be attached to the inner side of the inner sheet layer 12H.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H is not particularly limited as long as it is in the form of a sheet. Here, the nonwoven fabrics that can be used for this upper-body disposable swimsuit, including the outer sheet layer 12S and the inner sheet layer 12H, are as follows. That is, as the constituent fibers of the nonwoven fabric, for example, synthetic fibers such as olefin-based, polyester-based, polyamide-based synthetic fibers such as polyethylene, polypropylene or their copolymers (for example, polyethylene and copolymers blended with ethylene as a copolymerization component) (single-component fibers) In addition, composite fibers such as core and sheath are also included), regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc. can be selected without particular limitation, and these can also be mixed and used. In order to increase the softness of the nonwoven fabric, it is preferable to use crimped fibers as the constituent fibers. In addition, even if the constituent fibers of the nonwoven fabric are hydrophilic fibers (including those made hydrophilic by a hydrophilic agent), they may be hydrophobic fibers or water-repellent fibers (water-repellent fibers made water-repellent by a water-repellent agent). including). In addition, nonwoven fabrics are generally classified into short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bonded (air-through) nonwoven fabrics, and needle punched nonwoven fabrics, depending on the fiber length, sheet forming method, fiber bonding method, and laminate structure. Nonwoven fabrics are classified into nonwoven fabrics, point-bonded nonwoven fabrics, laminated nonwoven fabrics (such as SMS nonwoven fabrics and SMMS nonwoven fabrics in which a meltblown layer is sandwiched between spunbond layers), and any of these nonwoven fabrics can be used.

When non-woven fabric is used for the outer sheet layer 12S and the inner sheet layer 12H, the fineness, basis weight and thickness of the constituent fibers can be determined as appropriate. It is preferably about m ² and about 0.1 to 1.3 mm.

In order to improve the fit around the waist, at least one of the front body F and the back body B is provided with a stretchable region elastically stretchable in the width direction WD inside the side seal portion 13 in the width direction WD. In the illustrated example of the exterior body 100, elongated elastic members 15 to 19 are provided between both sheet layers 12S and 12H. A portion of the portion M) is an elastic region that elastically expands and contracts in the width direction WD. As the elastic members 15 to 19, elongated ones (thread-shaped, cord-shaped, band-shaped, etc.) are used in the illustrated example, but net-shaped or sheet-shaped ones can also be used. Also, the elastic members 15 to 19 may be made of synthetic rubber or natural rubber. Hot-melt adhesives by various coating methods can be used for laminating both sheet layers 12S and 12H of the exterior body 100 and fixing the elastic members 15 to 19 sandwiched between them. Ultrasonic bonding) can also be used.

To explain the illustrated example in more detail, between the inner surface of the inner sheet layer 12H and the outer surface of the cover sheet layer 12r formed by folding back the outer sheet layer 12S at the waist lower end portion W of the back body B and the front body F. , a plurality of torso lower end elastic members 17 are provided so as to be continuous across the entire width direction, spaced apart in the front-rear direction LD, and stretched along the width direction WD at a predetermined elongation rate. there is One or more of the torso lower end elastic members 17 disposed in the region adjacent to the chest U may overlap the inner body 200, or may overlap with the inner body 200 at the central portion in the width direction. , may be provided on both sides in the width direction. The trunk lower end elastic member 17 has a thickness of about 155 to 1880 dtex, especially about 310 to 1240 dtex ⁽ for synthetic rubber. .0 mm ² ) are fixed at intervals of 4 to 12 mm, with an elongation rate of 150 to 400%, particularly 220 to 320%. Further, it is not necessary for all of the waist bottom end elastic members 17 to have the same thickness and elongation rate.

In addition, except for the central portion in the width direction that overlaps the inner body 200, the upper side and A plurality of chest elastic members 15 and 19 are spaced apart in the front-rear direction LD and stretched along the width direction WD at a predetermined elongation rate so as to be continuous across the width direction at each portion on both sides in the width direction. fixed in place.

The chest elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially 310 to 1240 dtex ⁽ for synthetic rubber). It is preferable to fix about 5 to 30 rubber threads of 1 to 15 mm, especially ³ to 8 mm, at an elongation rate of 200 to 350%, especially about 240 to 300%.

In addition, except for the central portion in the width direction overlapping with the inner body 200, the width A plurality of intermediate elastic members 16 and 18 are provided on both sides in the width direction so as to be continuous throughout the width direction, and are spaced apart in the front-rear direction LD and stretched along the width direction WD at a predetermined elongation rate. fixed in place.

The intermediate elastic members 16, 18 have a thickness of 155 to 1880 dtex, especially 310 to 1240 dtex ⁽ for synthetic rubber). .0 mm ² ) are fixed at intervals of 5 to 40 mm, particularly 5 to 20 mm, at an elongation rate of 150 to 300%, particularly 180 to 260%.

As shown in the figure, the chest elastic members 15 and 19 and the intermediate elastic members 16 and 18 overlap the inner body 200 in the width direction WD. If the inner body 200 is provided on both sides in the width direction except for the entire joint area with the outer body 100, the inner body 200 does not shrink more than necessary in the width direction WD, and the appearance is poor. I have nothing to do. In this form, elastic members are present only on both sides in the width direction. In the central portion, the elastic member is finely cut at one or a number of locations, so that the contractile force does not act (substantially, it is equivalent to not providing the elastic member), and only both sides in the width direction are contractive force acting portions. The form configured as is also included. Of course, the arrangement of the chest elastic members 15, 19 and the intermediate elastic members 16, 18 is not limited to the above example. Part or all of the intermediate elastic members 16 and 18 can also be provided across the inner body 200 from one side to the other side in the width direction.

(Side seal part)
The side seal portion 13 is a portion where the joint portion 14 between the side portion of the front body F and the side portion of the back body B is disposed, as shown in enlarged view in FIGS. 9(b) and 9(c). The joint 14 can be joined by material welding such as heat sealing or ultrasonic sealing, or by hot-melt adhesive. The side seal portion 13 may be a single continuous joint portion 14, but is preferably a portion in which a large number of joint portions 14 are arranged at intervals. The patterns of the joints 14 in the left and right side seal portions 13 are generally the same, but may be different.

When the side seal portion 13 is formed by arranging a large number of joint portions 14, the shape of each joint portion 14 can be appropriately determined, and may be a polygon such as a triangle, particularly a regular polygon, a semicircle, a star, a circle, or the like. There is no particular limitation, such as an elliptical shape. Moreover, all of the joints 14 may have the same shape and the same size, or a plurality of types of joints 14 different in at least one of the shape and size may be combined. The dimensions of each joint 14 can be determined as appropriate. In a normal case, the longitudinal dimension 14y of each joint 14 can be about 0.6 to 2.5 mm. The width dimension 14x of each joint 14 can be about 0.6 to 7.0 mm. Also, the distance 14d between the joints 14 in the front-rear direction can be about 0.5 to 5.0 mm.

Characteristically, as shown in FIGS. 1, 2, and 6 to 9, at least a partial range in the front-rear direction of the waist portion T has an elastic region, and the width of the left and right side seal portions 13 is increased. The gaps D1 and D2 in the direction WD form a gap reduction portion 101 that narrows step by step (in addition to being one step as shown in the figure, it may also be in a plurality of steps or continuously) toward the side of the waist opening WO. there is In this upper-body disposable swimsuit, the waist size is determined by the intervals D1 and D2 between the left and right side seal portions 13 in the width direction WD. Therefore, when the interval reduction portion 101 is provided, as can be seen from the wearing state schematically shown in FIG. Even if this works, the reduced space portion 101 that is in closer contact with the skin acts as a resistance, and slipping up is suppressed. As can be seen from the intervals D1 and D2 shown in FIG. 9A, the interval in the width direction WD between the left and right side seal portions 13 is It means the interval at the innermost (central side) joint 14 .

The position of the interval reduction portion 101 can be determined as appropriate. Normally, it is preferable that the space reduction portion 101 is positioned on the waist opening WO side of the waist portion T. As shown in FIG. As a specific example, as shown in FIG. 9A, the position of the intersection of the side seal portion 13 and the waist opening WO is set to 0%, and the position of the intersection of the side seal portion 13 and the arm opening AO is set to 100%. In this case, it is preferable that the entire area below the 15% to 40% position (on the side of the trunk opening WO) is the space reduction portion 101. FIG. The upper side of the space reduction portion 101 (arm opening AO side) can be a portion where the space D1 in the width direction WD between the left and right side seal portions 13 is constant.

In addition, a portion 102 above the space decreasing portion 101 (arm opening AO side) has a space increasing portion 103 in which the space D3 in the width direction WD between the left and right side seal portions 13 widens toward the waist opening WO side. can also This example is preferable in that the change in the size of the waist portion T in the front-rear direction is close to that of a child's body, and the effect of suppressing slipping up can be further improved.

Although the extent of the gap change in the gap reduction portion 101 can be determined as appropriate, it is generally preferred that the gap change rate α defined below is 8 to 31%. That is, the interval change rate α referred to here is the maximum value of the interval in the width direction (D1 in the example of FIG. 9A), Dmax, and the minimum value of the interval in the width direction WD (D2 in the example of FIG. 9A). ) is Dmin, and the length of the side seal portion 13 in the front-rear direction is Z, it is determined by the following formula (1).
α = {(Dmax−Dmin)/Z}×100 (1)

The side seal portion 13 is not particularly limited as long as it can form the interval reduction portion 101 . For example, as shown in FIG. 8A, the side seal portion 13 may have a shape in which linear portions along the front-rear direction LD are arranged in a stepped manner. Also, although not shown, the joint portions 14 forming the side seal portions 13 may be arranged in a straight line along an oblique direction, or the joint portions 14 forming the side seal portions 13 may be arranged as shown in FIG. It is also possible to form a curved line along the surface of the body.

In this way, in order to form the space reduction portion 101, the side seal portion 13 composed of the joint portions 14 arranged in a line can be obliquely provided. However, in this case, at the space reduction portion 101, the front body F and the back body B are separately left over in the outer side of the side seal portion 13, resulting in a poor appearance. Although this surplus portion can be cut off, waste material is generated. Therefore, as shown in the illustrated example, main side seal portions 13a, which are located on the outermost sides in the width direction WD and are provided over the entire waist circumference portion T in the front-rear direction LD, and main side seal portions 13a It is preferable to provide an auxiliary side seal portion 13b which is located inside in the width direction WD from the portion 13a and which is provided only in the interval reduction portion 101, respectively. In this case, the portion having the auxiliary side seal portions 13b becomes a reduced interval portion 101 where the interval in the width direction WD between the left and right side seal portions 13 is narrower than the portion having no auxiliary side seal portions 13b. As a result, although the surplus portions 105 of the front body F and the back body B remain outside the side seal portions 13, since they are joined by the main side seal portions 13a, the appearance does not deteriorate as compared to the case of non-joining. . Furthermore, this surplus portion 105 can also be used as a knob when pulling down the upper body disposable swimsuit (if the surplus portions of the front body F and the back body B remain separately, only one of them can be used). If pulled, the main side seal portion 13a may come off).

The auxiliary side seal portions 13b may be provided in one row on each side as shown in FIG. 9B and the like, or may be provided in multiple rows at intervals in the width direction WD as shown in FIG. 9C.

It is preferable that the joint portion 14 of the auxiliary side seal portion 13b is detachable. For example, when the auxiliary side seal portions 13b are arranged in a single row, the user can select whether or not the auxiliary side seal portions 13b are peeled off, thereby enabling selection of whether or not there is a slip-up suppression function. When there are a plurality of rows of the auxiliary side seal portions 13b as shown in FIG. 9(c), the user can select a row of the auxiliary side seal portions 13b (one row or By peeling off only the multiple rows, the tightness of the waist circumference at the reduced spacing portion 101 can be adjusted.

(inner body)
The inner body 200 extends from the front side of the shoulder portion S to the rear side of the shoulder portion S through the shoulder portion S, and can take any shape. A neck opening NO is formed in the middle of WD. The inner body 200 can also be formed of a single sheet layer. However, it is difficult to ensure rigidity with a single layer, and it is conceivable that attachment of the rising gathers 60 described later and attachment to the exterior body 100 will be difficult. Therefore, as shown in FIGS. 3 to 5, the inner body 200 preferably has a laminated structure including the top sheet 30 on the body side and the back sheet 11 on the outer body 100 side. Various nonwoven fabrics can be suitably used as the top sheet 30 and the back sheet 11 . Further, as in the examples shown in FIGS. 3 to 5, both side portions of at least one of the top sheet 30 and the back sheet 11 may be folded back to improve the rigidity of the side portions. Furthermore, as in the example shown in FIGS. 11 and 12, another reinforcing sheet 40 can be incorporated between the top sheet 30 and the back sheet 11 to improve the rigidity of the interior body 200 as a whole. The reinforcing sheet 40 can be incorporated in a state in which it is folded multiple times, such as in two, as shown in the drawing. As the reinforcing sheet 40, for example, a nonwoven fabric having a bending resistance of 0.4 to 10 mN·cm by the cantilever method specified in JISL1913 (for example, an air-through fabric having a fineness of 1.8 to 6.0 dtex and a basis weight of 5 to 40 g/m ² ) is used. Nonwoven fabrics (thermal bonded nonwoven fabrics), spunbonded nonwoven fabrics, laminated nonwoven fabrics such as SMMS nonwoven fabrics in which a meltblown nonwoven fabric layer is sandwiched between spunbonded nonwoven fabric layers, etc.) can be used.

The dimensions of the inner body 200 are not particularly limited. Normally, the width dimension 200X of the inner body 200 can be about 30 to 50% of the overall product width X, and the front-rear dimension 200Y of the inner body 200 can be about 50 to 100% of the total product length Y. can. The position of the inner body 200 in the front-rear direction LD is not particularly limited, and it may be arranged at the center of the product in the front-rear direction LD, or it may be arranged at the front or rear side of the product.

(Getting up gathers)
It is one preferred form to provide rise gathers 60 that rise on the skin side on both sides of the inner body 200 and to provide gather elastic members 63 on the rise gathers 60 as shown in the illustrated example. That is, the rising gathers 60 are formed by folding a strip-shaped gather sheet 62 having a length equal to the length of the inner body 200 in the front-rear direction LD in the width direction WD and folding it in two. In addition, a plurality of elongated gather elastic members 63 are fixed in a stretched state along the longitudinal direction at intervals in the width direction WD. A base end portion of the rising gathers 60 located on the opposite side to the tip portion (the end portion on the side opposite to the sheet folded portion in the width direction WD) is a root portion 65 fixed to the back surface of the side edge portion of the inner body 200 . ing. The portion other than the base portion 65 is a main body portion 66 (a portion on the side of the folded portion) that is folded back from the base portion 65 to the front side of the inner body 200 on the side of the inner body 200 . Of the main body portion 66, the portion positioned on the front side of the inner body 200 has a root side portion directed toward the center in the width direction and a tip side portion folded back from the tip of the root side portion to the outside in the width direction. there is A portion of the front side of the main body portion 66 becomes a lodged portion 67 formed by being fixed to the side surface of the top sheet 30 by hot-melt adhesive or heat sealing in the laid-down state, and a portion of the rear side of the main body portion 66 is formed. are laid down portions 67 formed by being fixed to the side surface of the top sheet 30 in the laid down state by means of a hot-melt adhesive or heat sealing. A portion of the main body portion 66 positioned between the front and rear fallen portions 67 is a non-fixed raised portion 68, and at least a tip portion of the raised portion 68 is provided with a gather elastic member 63 extending in the front-rear direction LD. It is fixed in the extended state.

When the gathering elastic member 63 is provided together with the rising gathers 60 in this way, it is difficult for the gathering elastic member 63 to rise from the wearer's shoulder, and a particularly good fit can be obtained.

The size and position in the front-rear direction LD of the gathered stretchable region E1 by the gathered elastic member 63 may be appropriately determined. For example, as in the example shown in FIG. If the inner body 200 has a gather stretchable region E1 formed by the gather elastic member 63 from the front end to the rear end in particular, the fit becomes good. However, in this case, contraction wrinkles can be seen in the shoulder portion S when viewed from the front side when worn. In addition, since shrinkage wrinkles are formed at the top of the shoulders S where the load is most applied to the skin, there is a possibility that the texture may deteriorate and the skin may be left with traces of the shrinkage wrinkles. Therefore, as in the example shown in FIG. 1 and the like, in the natural length state, the disposable upper-body swimsuit has a gathered stretchable region E1 formed by the gathered elastic members 63 behind the center of the upper-body disposable swimsuit in the front-rear direction LD. It is also preferable that there is no gather stretchable region E1 by the gather elastic member 63 in the center of the front-rear direction LD and on the front side thereof. In this way, by arranging the gather elastic member 63 biased toward the back body B side, in the worn state, the gathered stretchable region E1 on the back body B side contracts, thereby reducing the gathered non-stretchable region on the front body F side. E2 is positioned at the top of the shoulder S. As a result, when viewed from the front side at the time of wearing, shrinkage wrinkles are not visible on the shoulder portion S, so that the appearance is improved. In addition, since contraction wrinkles are not formed at the top of the shoulders S where the load is most applied to the skin, the skin feels good and the marks of contraction wrinkles are less likely to be left on the skin.

The gather stretchable region E1 by the gather elastic member 63 is contracted in the front-rear direction LD due to the contraction of the gather elastic member 63 in the natural length state, and is stretched in the front-rear direction LD together with the gather elastic member 63 by being pulled in the front-rear direction LD. possible area. Therefore, the area in which the gather elastic member 63 is provided but whose stretchability is reduced is not the gather stretchable area E1, but the gather non-stretchable area E2. As long as the front end of the gathered stretchable region E1 formed by the gathered elastic members 63 is positioned on the rear side of the center of the upper-body disposable swimsuit in the front-rear direction LD in the natural length state, the front end extends in the front-rear direction of the upper-body disposable swimsuit in the unfolded state. It may be located at the same position as the center of the LD or on the front side. In the normal case, the front end of the gathered stretchable region E1 formed by the gathered elastic members 63 is positioned in the center of the upper-body disposable swimsuit in the front-rear direction LD in the unfolded state, or is positioned further rearward (for example, in a range of about 10% of the total length). ).

The dimensions and positions of the front and rear fallen portions 67 in the front-rear direction LD and the dimensions and positions of the raised portions 68 in the front-rear direction LD can be determined as appropriate, but as in the normal case, the gather stretchable region E1 by the gather elastic member 63 can be determined. is preferably provided only on the rising portion 68, not on the falling portion 67. Therefore, as in the example shown in FIG. When the center and the front side thereof are the non-stretchable gathered region E2, the entire stretchable gathered region E1 is the raised portion 68, and substantially the entire front-to-rear direction LD of the non-stretchable gathered region E2 is the front side. It is desirable that the lodged portion 67 of the Moreover, it is desirable to provide the rear fallen portion 67 only at the rear end portion of the body portion 66 .

As the gather sheet 62, nonwoven fabric such as spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), meltblown nonwoven fabric, etc., which is soft and excellent in uniformity and concealability, is water-repellent with silicone or the like as necessary. A treated nonwoven fabric can be preferably used, and the basis weight of the nonwoven fabric in this case can be about 10 to 30 g/m ² . As the gather elastic member 63, an elongated elastic member such as rubber thread having a thickness of about 470 to 1240 dtex, more preferably about 620 to 940 dtex can be used. The elongation rate of the gather elastic member 63 is preferably 150-350%, more preferably 200-300%.

The number of gathered elastic members 63 provided in the raised portion 68 is preferably 2-6, more preferably 3-5. An appropriate spacing 60d between the gathering elastic members 63 is 3 to 10 mm. The gather elastic member 63 can be arranged not only on the tip side of the raised portion 68 but also on the root side.

The attachment target of the base portion 65 of the rising gathers 60 is not particularly limited.

The dimensions of the rising gathers 60 can be determined as appropriate. Normally, as shown in FIG. 3, the standing height (the widthwise length of the body portion 66 in the unfolded state) W6 of the rising gathers 60 is preferably 15 to 60 mm, particularly preferably 20 to 40 mm. In addition, the separation distance W3 between the innermost creases in the state where the rising gathers 60 are folded flat so as to be parallel to the surface of the top sheet 30 is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

As in the example shown in FIGS. 13 and 14, a gather elastic member 63 extending in the front-rear direction LD may be built in between the sheets of the interior body 200 . In this case, the rising gathers 60 can be omitted. Alternatively, the inner body 200 in the illustrated example may be omitted, and only the gathered elastic members 63 extending in the front-rear direction LD may be attached to the outer body 100 .

(neck opening)
The neck opening NO can be formed by punching out with a hole cutter after attaching the inner body 200 to the outer body 100 . Also, an opening constituting the neck opening NO may be individually formed in the exterior body 100 and the interior body 200, and the interior body 200 may be attached to the exterior body 100 so that the two openings overlap. In the latter case, the opening of the outer body 100 and the opening of the inner body 200 can be different in size and shape, and in that case, the overlapping portion of the two openings becomes the neck opening NO of the upper-body disposable swimsuit.

The shape of the neck opening NO is not particularly limited. It can have an appropriate shape such as a rhombus along the front-rear direction LD. Further, the shape of the neck opening NO may be symmetrical in the front-rear direction, or may be asymmetrical in the front-rear direction. If both side edges of the neck opening NO overlap with the elastic gather region E1 of the elastic gather member 63 in the longitudinal direction LD and are not along the elastic direction (i.e., the longitudinal direction LD), the shoulder portion S may be deformed by the elastic gather member 63. Shrinkage wrinkles formed in the shoulder portion S tend to be irregular when the shoulder portion S is contracted to some extent. Therefore, as in the example shown in FIG. 10(a), both side edges of the neck opening NO form a straight line along the front-rear direction LD in the range where they overlap with the gather elastic region E1 of the gather elastic member 63 in the front-rear direction LD. A form is also proposed. As a result, the shrinkage wrinkles formed on the shoulder S become more regular, resulting in a more pleasing appearance. In this case, both side edges of the neck opening NO do not have to be linear in the front-rear direction LD as long as they do not overlap the gather stretchable region E1 of the gather elastic member 63 in the front-rear direction LD.

The positional relationship between the neck opening NO and the rising gathers 60 is not particularly limited, but as in the illustrated example, both side edges of the neck opening NO are positioned closer to the center in the width direction WD than the tips of the rising gathers 60 in the unfolded state. This is preferable because the neck opening NO can be easily cut during manufacturing.

Furthermore, as in the illustrated example, the front end of the neck opening NO is located at the same position as or forward than the rear end of the front lying portion 67, and the rear end of the neck opening NO is located at the rear lying portion 67. , the portion other than the shoulder portion S (especially the portion contracted in the width direction by the elastic members 15 to 19 in the illustrated example) does not contract in the front-rear direction LD. , looks better. However, the front end of the neck opening NO may be positioned on the rear side of the rear end of the front lying portion 67, and the rear end of the neck opening NO may be positioned on the front side of the front end of the rear lying portion 67. or both.

The specific dimensions of the neck opening NO may be determined as appropriate. Normally, the width dimension Xn of the neck opening NO can be about 0 to 40% of the total product width X, and the front-rear dimension Yn of the neck opening NO can be about 30 to 75% of the total product length Y. can. The case where the width dimension Xn of the neck opening NO is 0% of the total width X of the product means the case where the neck opening NO has no width in the unfolded state like a slit. If the width dimension Xn of the neck opening NO is larger than 0% of the total width X of the product, the neck opening NO will have a width even in the unfolded state. , the width dimension Xn of the neck opening NO is preferably larger than 10% of the overall product width X, more preferably larger than 20%. The position of the neck opening NO in the front-rear direction LD is not particularly limited, and it may be arranged at the center of the product in the front-rear direction LD, or it may be arranged at the front or rear side of the product.

<Description of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

・"Front-back direction" means the direction (longitudinal direction) indicated by symbol LD in the figure, and "width direction" means the direction (left-right direction) indicated by WD in the figure. are orthogonal.

・"Front side" means the side closer to the wearer's skin when wearing a disposable upper body swimsuit, and "back side" means the side farther from the wearer's skin when wearing a disposable upper body swimsuit. .

・"Front surface" means the side of the member that is closest to the wearer's skin when wearing the upper body disposable swimsuit, and the "back side" means that the upper body disposable swimsuit means the far side.

- "Elongation rate" means a value when the natural length is taken as 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.

- "Matsuke" is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1° C., relative humidity 50±2%) to a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.

- "Thickness" is automatically measured using an automatic thickness gauge (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N/cm ² and a pressurized area of 2 cm ² .

- "Unfolded state" means a flat unfolded state without contraction or slack.

・Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

・If there is no description about environmental conditions for testing and measurement, the test and measurement shall be performed in a laboratory or equipment under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%). do.

INDUSTRIAL APPLICABILITY The present invention is applicable to upper body disposable swimsuits.

DESCRIPTION OF SYMBOLS 100... Exterior body, 101... Distance reduction part, 11... Back sheet, 12H... Inner sheet layer, 12S... Outer sheet layer, 12r... Folding part, 13... Side seal part, 13a... Main side seal part, 13b... Auxiliary side Seal portion 14 Joint portion 200 Inner body 30 Top sheet 40 Reinforcement sheet 60 Rising gather 62 Gather sheet 63 Gather elastic member 65 Base portion 66 Body portion 67 ... Falling portion 68 ... Rising portion AO ... Arm opening B ... Back body D1, D2 ... Spacing E1 ... Gather stretchable area E2 ... Gathered non-stretchable area F ... Front body LD ... Front and back direction M ... Intermediate part, NO... neck opening, S... shoulder part, T... waist circumference part, U... chest part, W... waist lower end part, WD... width direction, WO... waist opening.

Claims (5)

Equipped with a front body covering the front part of the upper body and a back body covering the rear part of the upper body,
A torso opening formed in the lower part, a neck opening formed in the upper part, a pair of shoulders positioned on both sides in the width direction of the neck opening, a pair of arm openings opening to the sides of the pair of shoulders, and lower ends of the arm openings Having a waist portion located between the width direction imaginary line passing through and the waist opening,
On both sides of the torso part, there are side seal parts where the joints between both sides of the front body and both sides of the back body are arranged,
An elastic region that elastically expands and contracts in the width direction is provided on the inner side of the side seal portion in at least one of the front body and the back body in the width direction.
A disposable swimsuit for the upper body,
At least part of the range in the front-rear direction of the waist portion has an elastic region, and is a space reduction portion in which the width direction space between the left and right side seal portions narrows stepwise or continuously toward the side of the waist opening. Yes,
The left and right side seal portions are composed of a main side seal portion positioned on the outermost side in the width direction and extending over the entire length of the waist in the front-rear direction, and a portion positioned on the inner side in the width direction of the main side seal portion to reduce the gap. Auxiliary side seal portions provided only in the
The widthwise interval between the left and right side seal portions in the portion having the auxiliary side seal portion is narrower than the widthwise interval between the left and right side seal portions in the portion not having the auxiliary side seal portion .
A disposable swimsuit for the upper body, characterized by: Above the space decreasing portion, there is a space increasing portion where the space between the left and right side seal portions in the width direction widens toward the body opening side.
A disposable swimsuit for the upper body according to claim 1. The interval change rate in the interval decreasing portion is 8 to 31%,
A disposable swimsuit for the upper body according to claim 1 or 2. The auxiliary side seal portions are provided in one row or in multiple rows at intervals in the width direction,
The junction of each auxiliary side seal is detachable,
A disposable swimsuit for the upper body according to any one of claims 1 to 3 . A gathered elastic member is provided on the shoulder portion along the front-rear direction,
At least part of the shoulder shrinks in the front-rear direction due to contraction of the gathers elastic member, and can extend in the front-rear direction together with the gathers elastic member.
The upper body disposable swimsuit according to any one of claims 1 to 4 .

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