Patent Application
20230097764
This disclosure relates to clothes.
Conventionally, a technique of joining fabrics together by an adhesive instead of join-ing fabrics together by using a sewing machine to compose clothes has been known. For example, in Japanese Patent Application Laid-open No. 2005-264394, a related technique of composing the hem part of a swimsuit or the like by bonding outer fabrics together with a hot-melt sheet when the outer fabrics such as the hem of a swimsuit or the like are folded has been developed.
On the other hand, as a technique of providing elongation properties to a joined part where fabrics are joined together using an adhesive, a technique of joining fabrics composing clothes together using an adhesive attached in the form of dots has been known. For example, in Japanese Patent No. 6249821, a technique of bonding fabrics together with an adhesive repeatedly provided in a dot or zigzag shape has been developed when the body and sleeves of an undershirt are joined.
Even for clothes composed using those techniques, however, the joined part between the fabrics is felt to be relatively difficult to stretch when the clothes are actually touched and worn, and thus uncomfortable feeling to the sense of touch and wearing feeling remains, although the numerical elongation properties are provided to the joined part where fabrics are joined together. This is because the conventional techniques focused only on the elongation properties at the joined part, whereby the essence of the uncomfortable feeling has not been completely captured when the clothes have been actually touched and worn. In other words, the cause of the uncomfortable feeling felt when the product is actually touched and worn is that the difference in elongation properties between the joined part and the fabrics adjacent to the joined part is so large that the difference in the outstanding elongation properties of the joined part and the fabrics adjacent to the joined part is felt as the uncomfortable feeling. Even when the elongation properties of the joined part are excellent, the sense of touch and wearing feeling have not been always satisfactory. In particular, not only when the closes are worn but also in the sense of resistance and hand feeling in a relatively low-stretch region such as when the clothes are held by hands and lightly stretched, the elongation properties of the adjacent fabrics usually have a further better state even if the elongation properties of the joined part are excellent. Consequently, the outstanding difference between the joined part and the adjacent fabrics has caused uncomfortable feeling to be generated. In particular, when the edge of the opening part is folded back and fixed with an adhesive, the difference in the elongation properties between the joined part and the fabrics adjacent to the joined part is easily felt when the clothes are worn and thus this difference has caused deterioration in the wearing feeling.
It could therefore be helpful to provide clothes that can improve an uncomfortable feeling when the joined part is actually touched and the clothes are worn, even when fabrics are joined using an adhesive to compose the clothes.
We thus provide clothes including: fabrics having a stretchability; and a joined part where the fabrics are fixed together using an adhesive. A difference between a stress of the joined part at 50% elongation in a longitudinal direction of the joined part and a stress of the fabrics fixed by the joined part at 50% elongation in a direction parallel to the longitudinal direction of the joined part is within 30%.
The joined part is fixed by a dot adhesive arranged in a single row or multiple rows, and a ratio of an area occupied by the adhesive at the joined part is 35% or less.
A peeling force at time of opening and peeling the joined part in the longitudinal direction is 10 N/cm or more.
A peeling force of the joined part in the longitudinal direction after high temperature washing at 92° C. is 75% or more of the peeling force before the washing.
The joined part is an opening part through which a wearer's human body part passes; and the opening part has a structure in which a fabric edge is folded in two, and the opening part is formed by fixing the fabric edge and a fabric body with a dot adhesive attached in a single row or multiple rows along the fabric edge.
We thus provide the clothes that can improve uncomfortable feeling when the joined part is actually touched and the clothes are worn, even when fabrics are joined using an adhesive to compose the clothes.
Hereinafter, our clothes (hereinafter, referred to as “examples”) will be described with reference to the attached drawings. The drawings are merely schematic.
The clothes 1 are made of stretchable fabrics. For example, a circular knitting material and a warp knitting material have a required stretchability and thus materials are not particularly limited as long as the materials are knitted materials provided as the materials for general clothes. Even when the materials are textile materials, materials for clothes have suitable stretchability. The clothes 1 can be applied to materials for general underwear and innerwear having cups, and in addition, for outerwear such as T-shirts and cut-and-sews and are not limited thereto.
In addition, in the opening parts 2, 3, and 4, the joined part composed of a structure in which the fabric edge is folded in two and the formed by fixing the fabric edge and the fabric body with the dot adhesive 9 attached in a single row or multiple rows along the fabric edge is also composed so that the difference between a stress of the joined part at 50% elongation in the longitudinal direction of the joined part and a stress of the fabrics fixed by the joined part at 50% elongation in a direction parallel to the longitudinal direction of the joined part is within 30%.
With respect to the clothes 1, the stress at 50% elongation is important. In general, as an index representing the elongation ratio of the clothes materials, elongation properties are frequently represented by an elongation ratio at a load of 1.5 kg. However, the elongation load to this level is rarely applied when the clothes 1 are actually worn or light exercise is performed. The elongation required for actually wearing the clothes 1 is an elongation ratio of about 50% and thus the difference in the stresses in this region is important.
As the direction of stretch of a single fabric, stretching the single fabric in a direction parallel to the longitudinal direction of the comparing joined part 5 in the state of the clothes 1 is important. In other words, the direction of elongation is not always a warp direction or a weft direction of the fabric. The direction differs depending on the cut shape of the fabric composing the clothes 1 and the direction where the fabric is taken.
The measurement method of the stress at 50% elongation is performed in accordance with the grab method of elongation rate described in JIS-L-1096 (2010). When a sample having a desired size cannot be taken depending on the design of the clothes 1, the measurement may be performed by reducing the sample size to 5 cm in width and 10 cm in length and setting the gripping spacing to 5 cm. For the stress measurement at the joined part, the sample may be taken by joining the joined part and the fabric region connecting to the joined part. In an aspect in which fabric edges are overlapped and joined, the sample is taken so that the joined part is centered. On the other hand, in an aspect in which the fabric edge is folded and connected, the same is true for collectively taking the sample the joined part and the fabric region connecting to the joined part. It is important that the adhesive region is gripped when the sample is gripped with a tensile tester. The sample is gripped at the position where the edge of the grip and the folded edge are aligned as much as possible and the measurement is performed.
In addition, in the stress measurement of the single fabric, a sample may be taken at any part of the same fabric as long as the part is in a direction parallel to the longitudinal direction of the joined part. It is important that the sample does not include other components including the joined part that worsen the elongation properties.
In the joined part 5 of the clothes 1, the adhesive 9 is arranged in two rows of dots along the edge of the fabric 8 or 8a. The preferable size of the adhesive 9 is different depending on the structure and thickness of the fabrics 8 and 8a composing the clothes 1. Dots having a diameter of about 1.0 mm to about 2.0 mm can easily provide relatively strong adhesive strength. However, in a thin fabric, the adhesive may seep through to the front side of the fabric and stand out and thus appearance may deteriorate. Consequently, the dots are preferably smaller in a range where required bonding strength is achieved. In an inner fabric having a fabric thickness of about 0.5 mm to about 0.8 mm, an adhesive having a diameter of 1.0 mm or less is preferable because the adhesive is less likely to seep through to the front side of the fabric. In further thinner fabrics having a fabric thickness of about 0.3 mm to about 0.5 mm, an adhesive having a diameter of 0.6 mm or less is preferable because the seepage of the adhesive is less likely to stand out. The adhesive 9 is in the shape of a circle in the first example but is not limited to this shape. The shape of the adhesive 9 may be any shape as long as the adhesive 9 can be repeatedly attached in a separated state. The shape may be a linear shape as long as the linear shape is not continuous. The shape may also be geometric shapes such as triangular, square, oval, or the like and may also be a combination of these shapes.
Synthetic resins are more preferable than natural resins as the resins that compose the adhesive 9 used in the clothes 1. Of these resins, thermoplastic resins are more preferable. For example, the resins are not particularly limited as long as the resins are made of macromolecule compounds such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl ace-tate, polyurethane, polytetrafluoroethylene, polyacrylic, polyamide, polyacetal, polycarbonate, polyphenylene ether, polyester, polyphenylene sulfide, polysulfone, polyethersulfone, poly-etheretherketone, polyimide, and polyamideimide and various macromolecule compounds can be used.
The resin composing the adhesive 9 is preferably a reactive hot melt. When the resin is the reactive hot melt, an adhesive structure having excellent heat resistance, solvent resistance and the like can be formed by softening or melting the resin to penetrate between structures at the bonding sites, cooling and solidifying the resin, and thereafter developing cross-linking by reacting the resin with the surrounding moisture.
In the clothes 1, it is important that the ratio of an area where the adhesive 9 is attached at the joined part is 35% or less. The area is preferably 30% or less and more preferably 25% or less. This allows the difference between the stress of the joined part at 50% elongation in the longitudinal direction and the stress of the fabrics fixed by the joined part at 50% elongation in the direction parallel to the joined part to be easily retained within 30% and thus the uncomfortable feeling can be reduced. The ratio of the area where the adhesive is attached at the joined part is preferably 5% or more from the viewpoint of retaining the bonding strength at the joined part. The ratio is more preferably 10% or more and further preferably 15% or more.
Ratio of area of adhesive in joined part=((Area of adhesive between unit pitches)/(Width 12 of joined part x Pitch 13 at which adhesive is attached))×100%.
In addition, when the pitch at which the adhesive 9 is attached at the joined part is not uniform can be considered. In such an example, the ratio can be produced from the area of adhesive attached in the gripping spacing in the stress measurement method at 50% elongation described above and is determined to be an average value measured at any five positions. Namely, as follows:
Ratio of area of adhesive in joined part=((Area of adhesive attached in gripping spacing)/(Width 12 of joined part x Gripping spacing))×100%.
With respect to the clothes 1, it is important that the peeling force when the joined part is opened and peeled off in the longitudinal direction is 10 N/cm or more. The peeling force is more preferably 20 N/cm or more. To reduce the stress of the joined part at 50% elongation described above, reduction in the area occupied by the adhesive at the joined part may be exemplified. However, this results in also reducing the peeling force at the joined part and causing peeling after repeated wear and washing and thus may easily cause a problem. From this result, to secure durability as the clothes 1, the peeling force is preferably 10 N/cm or more and preferably 20 N/cm or more in terms of per 1 cm width of the joined part.
In general, as an indicator of the strength of the joined part represented by sewing with a sewing machine, the strength when the joined part is pulled in the direction orthogonal to the longitudinal direction of the joined part is used. However, the desired pulling test may not be reproducible depending on the design of the clothes. Consequently, it is suitable that the peeling force when the joined part is opened and peeled in the longitudinal direction of the joined part is evaluated as the bonding strength. The method of measurement is performed in accordance with the test method for peeling strength described in JIS-L-1086 (2013) and the obtained results are represented by converting the peeling strength per width of the joined part into the peeling strength per 1 cm.
With respect to the clothes 1, peeling force measured by opening and peeling the joined part in a longitudinal direction after high-temperature washing at 92° C. is preferably 75% or more of the peeling force before the washing. This ratio is more preferably 80% or more and further preferably 90% or more. The washing method is equivalent to 5-times washing of the 9N method specified in JIS-L-1930 (2014). This allows sufficient durability to be secured even when the repeated wear and washing are performed when the area occupied by the adhesive 9 is reduced to reduce the above-described stress at 50% elongation. In addition, the clothes 1 can secure sufficient durability to the high temperature washing that is commonly performed in Europe.
The examples for implementing our concepts have been described above. This disclosure should not be limited by the examples described above. For example, the same effect may be provided to openings and other joined parts of clothes such as hats, arm covers, and clothes with cups.
In a clothes 1 that was a common underwear as illustrated in
The obtained test specimen was evaluated for an elongation ratio at 1.5 Kg load, stress difference at 50% elongation between the joined part and the fabric, peeling force, peeling force retention ratio after high temperature washing, and resistance feeling when the joined part was stretched. The results are listed in Table 1. The resistance feeling when the joined part is stretched is the uncomfortable feeling when a fabric including the joined part is stretched by hand “o” means that the joined part is stretched together with the fabric when the fabric is stretched and no resistance exists, whereas “x” means that resistance exists at the joined part when the fabric is stretched.
In a clothes 1 that was a common underwear as illustrated in
The test specimen of Example 3 was obtained by the same manner as the manner in Example 2 except that the pitch of the application of the adhesive 9 in the longitudinal direction was set to 1.6 mm. The results that were evaluated in the same manner as the manner in Example 1 are listed in Table 1.
The test specimen of Example 4 was obtained by the same manner as the manner in Example 1 except that the diameter of the adhesive 9 was set to 0.4 mm (0.5 mm after bonding). The results that were evaluated in the same manner as the manner in Example 1 are listed in Table 1.
In a commonly sold underwear as illustrated in
In a pair of commonly sold shorts as illustrated in
In Comparative Example 3, in a commonly sold underwear as illustrated in
In Comparative Example 4, the specimen was obtained in the same manner as the manner in Example 1 except that the pitch of the adhesive application in the longitudinal direction was set to 1.0 mm. The results that were evaluated in the same manner as the manner in Example 1 are listed in Table 1.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2020-036129 | Mar 2020 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2021/007375 | 2/26/2021 | WO |
