HK1237220A1 - Swimsuit - Google Patents

Abstract

A swimsuit (1) comprising an elastic textile treated for water repellency, wherein at least a portion of the swimsuit includes a stripe pattern in the body length direction, the stripe pattern includes recessed stripe sections (2) and protruding stripe sections (3), and the protruding stripe sections (3) have independent recessed patterns (4). The bottom section of the independent recessed patterns (4) is preferably shallower than the bottom section of the recessed stripe sections (2). It is preferable for the independent recessed patterns (4) to be rectangular and be arranged so that the diagonal lines thereof are aligned with the body length direction, or for the independent recessed patterns (4) to be ellipsoidal or ovoid and be arranged so that the long axes thereof are aligned with the body length direction . The recessed stripe sections (2) and the independent recessed patterns (4) are preferably formed by embossing. This provides a swimsuit having low surface friction resistance.

Description

Swimming suit

Technical Field

The invention relates to swimming suit. More preferably swimsuits for swimming competitions.

Background

One function required of swimsuits and swimming caps is to reduce the surface frictional resistance of the swimsuit in the water during a swimming match. Various kinds of swimwear have been proposed in the past, and patent document 1 proposes swimwear in which a striped pattern is formed by embossing. The present applicant has proposed swimwear in which a striped pattern formed by embossing, a water repellent portion, and a non-water repellent portion are arranged in a striped pattern along the length direction in patent documents 2 to 4.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-212811

Patent document 2: japanese patent laid-open No. 2000-226709

Patent document 3: japanese patent laid-open No. 2000 and 314015

Patent document 4: japanese patent laid-open publication No. 2006-348398

Disclosure of Invention

However, the conventional swimwear has a problem of high surface friction resistance, and further improvement is required.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a swimsuit having a low surface frictional resistance.

The swimwear of the present invention is made of a stretchable water-repellent fabric, at least a part of which includes a stripe pattern in the longitudinal direction, the stripe pattern including a concave stripe portion and a convex stripe portion, and the convex stripe portion having an independent concave stripe pattern.

The swimwear of the present invention includes a striped pattern in the body length direction, and is subjected to water repellent treatment, wherein the striped pattern includes a concave striped portion and a convex striped portion, and the convex striped portion has an independent concave pattern, thereby providing swimwear having low surface friction resistance.

Drawings

Fig. 1 is a schematic plan view of a swimsuit fabric according to an embodiment of the present invention.

Fig. 2A is an enlarged plan view of the swimsuit fabric of fig. 1, and fig. 2B is an enlarged view of the concave pattern of fig. 2A in a case where corners of a diamond shape are trimmed to a circular shape.

Fig. 3 is a sectional view of the swimsuit fabric of fig. 2 taken along line I-I.

Fig. 4 is a schematic top view of the swimsuit.

Fig. 5 is a schematic back view of the swimsuit.

Fig. 6A is a schematic front view of a swimsuit according to another embodiment of the present invention, and fig. 6B is a schematic back view of the swimsuit.

Fig. 7A is a side view of a cylindrical base body used for measuring frictional resistance in water according to an embodiment of the present invention, and fig. 7B is a cross-sectional view taken along line I-I thereof.

Fig. 8 is an explanatory view showing an apparatus for measuring the time of dropping the cylindrical base body in water.

Fig. 9 is an explanatory view showing a method and an apparatus for measuring a time for which the cylindrical base body falls in water for a predetermined distance.

Fig. 10A is a perspective view when the cylindrical base body is developed, and fig. 10B is a plan view thereof.

Detailed Description

The swimsuit of the present invention is formed by sewing a cloth having a striped pattern in the body length direction and subjected to water repellent treatment. The stripe pattern of the fabric includes a concave stripe portion and a convex stripe portion, and the surface friction resistance can be reduced by forming an independent concave pattern in the convex stripe portion. That is, the convex stripe portion maintains the original fabric texture, but when a fine and independent concave pattern is formed, the surface friction resistance is reduced. The independent concave patterns are round, oval, long round, diamond, square and the like. The area of the independent concave pattern is preferably 0.05-5 mm²More preferably 0.1 to 4mm². The stripe pattern and the independent concave pattern in the convex stripe portion are preferably formed on the entire surface of the swimsuit, but may be formed locally. When the surface is locally formed, the area ratio is preferably 50% or more, more preferably 70% or more, and still more preferably 90% or more.

The widths of the concave portion stripe portion and the convex portion stripe portion are preferably 3 to 15mm, more preferably 5 to 12mm, respectively. Within this range, the surface frictional resistance is reduced. The width of the concave portion stripe portion may be the same as or different from that of the convex portion stripe portion, but the width of the concave portion stripe portion is preferably narrower. Further, the bottom of the isolated concave pattern is preferably shallower than the bottom of the concave stripe portion. This can further reduce the surface friction resistance.

The individual recessed pattern is rectangular, and is preferably arranged so that a diagonal line extends in the longitudinal direction. The rectangle is preferably a diamond. It is particularly preferable that the elongated diamond shape (square pattern) is arranged in the body length direction. The corners of the diamond are preferably trimmed to a circle. This can further reduce the surface friction resistance. The individual concave patterns may be elliptical or oval, and may be arranged such that the major axis extends in the longitudinal direction. This can further reduce the surface friction resistance.

The individual recess patterns are preferably arranged regularly. Thereby, it is possible to prevent the generation of turbulence and further reduce the surface friction resistance. The recessed stripe portion and the independent recessed pattern are preferably formed by embossing. By the embossing, an accurate pattern can be provided.

In the present invention, the fabric may be a woven fabric or a knitted fabric. As an example, there is a woven fabric having elasticity in both longitudinal and lateral directions based on a hybrid of synthetic fiber multifilament yarn and spandex fiber. As this knitting method, a single circular knitting fabric, a double circular knitting fabric, a tricot fabric as a warp knitting fabric, or a raschel fabric can be used, and a tricot fabric is more preferable from the viewpoint of stretchability, thinness, and the like, which affect the degree of easy movement.

In order to achieve a stronger supporting force, a woven fabric using a composite yarn in which a spandex fiber is covered with a synthetic multifilament yarn as a material is more preferable as the warp and weft yarns.

The fineness of the spandex fiber is preferably 22decitex or more and 156decitex or less. The spandex fiber used may be a known fiber, and for example, "ROICA" available from asahi chemical fiber corporation and "lycra" available from tokyo peyer corporation can be used. The kind of the spandex fiber causes a difference in stress, and thus is preferably selected appropriately according to the use area. In the case of swimwear, it is assumed that it is used in a swimming pool, and therefore, it is preferable to use spandex fibers having excellent chlorine resistance, such as "ROICA SP", "lycra 176B", "lycra 254B", and "lycra 909B".

Among the synthetic fiber multifilament yarns, synthetic fibers such as polyamide-based fibers and polyester-based fibers are preferable in terms of strength and processability. The fiber form and the cross-sectional shape of the synthetic fiber are not particularly limited, but in order to obtain a highly elastic fabric, it is preferable to apply false twist by a known method and impart crimp, and in order to obtain a fabric having a smooth surface, it is preferable to use a straight raw yarn.

The stretchable fabric preferably has an elongation of 30 to 250%, more preferably 60 to 180%, in both the longitudinal and transverse directions, as measured by the slitting method (17.7N (l.8k g) load, 5cm width) in JIS L1096A. If the stretchability is within the above range, the fabric has appropriate stretchability, is easy to wear, and is suitable for sportswear including swimwear.

In the case of a woven fabric, the stretch fabric is preferably a plain weave fabric, a twill weave fabric, or the like, and the knitted fabric is preferably a tricot weave fabric, a raschel weave fabric, or the like. The stretch fabric may be used for all or a part of the swimwear.

Swimwear for swimming competitions is preferably made from a model that is about 10% to 40% smaller than the human body. Thus, the garment can be worn snugly on the human body.

The following drawings are used for explanation. In the following drawings, like reference numerals denote like elements. Fig. 1 is a schematic plan view of a swimsuit fabric 1 according to an embodiment of the present invention. The swimwear fabric 1 includes a stripe pattern along a length direction (height direction) 5, the stripe pattern includes a concave stripe portion 2 and a convex stripe portion 3, and an independent concave stripe portion 4 is formed in the convex stripe portion 3. Fig. 2A is an enlarged plan view of the swimsuit fabric of fig. 1. The square piece pattern of the concave pattern 4 is formed along the body length direction (height direction) 5. Fig. 2B is an enlarged view of the recess pattern of fig. 2A in the case where the corners of the diamond shape are trimmed to be circular.

Fig. 3 is a sectional view of the swimsuit fabric of fig. 2 taken along line l-I. In this example, the bottom of the isolated concave pattern 4 is shallower than the bottom of the concave stripe portion 2.

Fig. 4 is a schematic front view of a swimsuit for women according to an embodiment of the present invention, and fig. 5 is a schematic back view of the swimsuit. The swimsuit 20 includes a stripe pattern 21 including a concave stripe portion and a convex stripe portion (individual concave patterns in the convex stripe portion are not shown).

Fig. 6A is a schematic front view of a male swimsuit according to another embodiment of the present invention, and fig. 6B is a schematic back view of the swimsuit. The swimsuit 22 includes a stripe pattern 23 composed of a concave stripe portion and a convex stripe portion (individual concave patterns in the convex stripe portion are not shown).

Examples

The present invention will be described in detail with reference to examples. The present invention is not limited to the following examples.

< elongation >

The measurement was carried out according to the slitting method of JIS L1096A. The width of the test piece was 5cm, and the holding interval was 20 cm. The initial load is a load corresponding to a gravity applied at a length of 1m under the width of the test piece. The drawing speed was 20 cm/min. The elongation (%) under a load of 17.7N (1.8k g) was measured. The elongation indicates the stretchability.

< frictional resistance in Water >

The measurement method and apparatus shown in FIGS. 7 to 9 were used. Fig. 7A is a side view of a cylindrical body (mold) used for the measurement, and fig. 7B is a cross-sectional view taken along line I-I of fig. 7A. The front end 33 of the cylindrical base (mold) 31 is spherical, and the rear end 34 is tapered. A cloth sample 39 of a swimsuit is attached to the cylindrical portion 32. The attachment means that the cloth sample 39 is wound around the cylindrical portion 32, pressed by the cylindrical jigs 38a and 38b, and inserted into the front end portion 33 and the rear end portion 34. The area of the fabric sample 39 attached to the cylindrical portion 32 was about 0.016mm². A weight 35 is inserted into the lower portion of the cylindrical portion 32. Further, a hollow portion (tube) 36 is inserted into the shaft portion of the cylindrical base (mold) 31, and a wire 37 is inserted therein as shown in fig. 8 to 9. CylinderThe weight of the matrix (model) 31 in water was 0.3N in the state of the swimsuit cloth attached, and the volume was 1.2 × 10^－3m³. The whole is made of resin. The diameter of the hollow portion 36 was set to 2.3 mm. The diameter of the model 31 is 30mm, the length is 300mm, and the portion for mounting the cloth is 200 mm. The mass was 88g including the cloth sample attached, and a spindle was attached to the inside of the base body in consideration of the buoyancy of the cloth and the model, and the weight in water was set to 0.3N.

Fig. 8 is an explanatory view showing an apparatus 40 for measuring the time of falling of the cylindrical base body in water. Water 42 is put into a transparent water tank 41 made of acrylic resin or the like. A shielding sheet 43 is attached to the back side of the water tank 41, a lamp 44 is disposed on the back side, and a high-speed camera 45 is disposed on the front side. The water tank 11 is made of transparent acrylic resin, and has a height (H) of 1.7m, a width (L) and a depth of 0.22m, respectively, and the high-speed camera 15 is disposed at a position 4.25m away from the water tank and at a height of 0.85m from the ground. The shooting speed of the high-speed camera 15 is 1900 fps. In this state, the cylindrical base (mold) 31 is allowed to fall quietly from above the water tank. The cylindrical base (mold) 31 falls along the line 37.

Fig. 9 is an explanatory view similarly showing a method and an apparatus for measuring a time for which the cylindrical base body falls in water by a predetermined distance. First, the rear end of the cylindrical base (mold) 31 is disposed on the water surface, and a laser spot 47 is set 200mm below the front end 46, a first measurement spot 48 is set 100mm below the laser spot, and a second measurement spot 49 is set 100mm below the laser spot. The laser spot 47 is formed by opening a hole in the mask 43 shown in fig. 8. The cylindrical base (mold) 31 is allowed to fall quietly in this state, and high-speed imaging by a high-speed camera is turned on when the tip 46 passes through the laser spot 47, and the time from the 1 st measurement point 48 to the 2 nd measurement point 49 is measured. Each sample was measured 10 times, and the average value thereof was used. The acceleration is obtained from the following calculation formula (formula 1).

[ formula 1]

u₁＝k₁/t₁

u₂＝k₂/t₂

Δt＝t₂

(wherein, k is₁Is the falling distance (mm), t, from the laser spot 47 to the 1 st measurement point 48 of FIG. 9₁Is the transit time (seconds), k, from the laser spot 47 to the 1 st measurement spot 48 of FIG. 9₂Is a falling distance (mm), t, from the 1 st measurement point 48 to the 2 nd measurement point 49₂Is the transit time (seconds) from the 1 st measurement point 48 to the 2 nd measurement point 49, and k in this example₁Set to 100mm, k₂Set to 200 mm. )

Coefficient of frictional resistance C of swimsuit fabric in water_fCalculated by the following formulas (formula 2) and (formula 3). Coefficient of frictional resistance C_fCan exhibit a value of 0.001.

[ formula 2]

[ formula 3]

Wherein W is gravity, and W ═ mg (m is the mass (kg) of the cylindrical substrate), g is the acceleration of gravity (m/s)²) B) is buoyancy, where B ═ ρ_wgV(ρ_wIs the density of water (kg/m)³) And V is the volume (m) of the cylindrical substrate³) D is resistance, and D ═ C)_f×(l/2)×ρu²A (ρ is density of water, u is falling speed, A is surface area of swimsuit cloth)

Fig. 10A is a perspective view of the cylindrical base body when it is expanded, and fig. 10B is a plan view thereof. To attach a cloth sample, a cloth is wound around the cylindrical portion 32, pressed by the cylindrical jigs 38a and 38b, and inserted into the front end portion 33 and the rear end portion 34.

(example 1)

< silk selection >

Polyester multifilament raw yarn (44decitex) and spandex ("lycra 254B" 44decitex) were used.

< knit fabric >

The warp pile-warp flat knit was knitted using a 32-needle count tricot knitting machine. The knitted fabric was dyed and subjected to water repellency treatment. The water repellent treatment is fixed to the woven fabric by using a known fluorine-based water repellent treatment agent. Next, embossing was performed. The embossing process is carried out at a roll temperature of 220 ℃, a linear pressure of 5500kgf and a roll speed of 6-10 m/min. The mass per unit area (basis weight) of the woven fabric was 230g/m². The frictional resistance value of the knitted fabric measured by the measuring apparatus of fig. 7 to 9 was 0.078. The dimensions in fig. 2 are as follows.

Total length al of concave portion stripe portion and convex portion stripe portion: 16mm

Width a2 of concave portion stripe portion 2: 7mm

Width a3 of convex stripe portion 3: 9mm

Lengths a4, a6 from both ends of the convex rib 3 to the end of the concave square rib 4: each 1mm

Width a5 of concave square pattern 4: 1mm

Length a7 of concave square pattern 4: 1.14mm

Length-wise interval a8 of concave square pattern 4: 2.3mm

Depth of concave portion stripe portion 2: about 0.05mm

Depth of concave square piece pattern 4: about 0.03mm

Thickness of the braid: 0.60mm

The elongation of the knitted fabric was 134% in the longitudinal direction (body length direction) and 123% in the transverse direction.

< swimming suit >

Swimwear for swimming match shown in fig. 4 to 6 was sewn using the obtained knitted fabric. When the wearing test was performed on this swimsuit, it was confirmed that the swimsuit was highly stretchable, easy to wear, good in close contact with the skin of the human body, low in sensory flow resistance, and suitable for swimming competitions.

(example 2)

< silk selection >

Covering the silk: raw nylon yarn (fineness 33decitex, number of yarn 10), core yarn: "Lycra 176B" (denier 44decitex) using Single Covered Yarn (SCY).

< textile >

The yarn is used to prepare the flexible textile. Using a rapier loom, longitudinal density: 180 roots/2.54 cm, transverse density: 178 pieces/2.54 cm, weight per unit area (basis weight) 135g/m²The thickness thereof was 0.28 mm. The fabric weave is plain weave. The textile fabric was subjected to water repellent processing and embossing processing in the same manner as in example 1. The elongation of the textile was 56.2% in the warp direction and 51.9% in the weft direction. Further, the coefficient of frictional resistance was 0.077. Swimwear for swimming match shown in fig. 4 to 6 was sewn using the obtained knitted fabric. When the wearing test was performed on this swimsuit, it was confirmed that the swimsuit was highly stretchable, easy to wear, good in close contact with the skin of the human body, low in sensory flow resistance, and suitable for swimming competitions.

Comparative example 1

A knitted fabric was produced in the same manner as in example 1, except that the concave square piece pattern 4 was produced. The coefficient of friction resistance of the obtained braid was 0.081. The swimsuit for swimming match shown in fig. 4 to 6 was sewn using the obtained knitted fabric. When this swimsuit was subjected to the wear test, the resistance to water flow was higher as compared with example 1.

Comparative example 2

A woven fabric was produced in the same manner as in example 2, except that the concave square piece pattern 4 was produced. The coefficient of frictional resistance of the obtained textile was 0.079. The swimsuit for swimming match shown in fig. 4 to 6 was sewn using the obtained knitted fabric. When the wearing test was performed on this swimsuit, the water flow resistance was perceived to be higher as compared with example 2.

Industrial applicability of the invention

The cloth for swimwear of the present invention can be exemplified by various sports clothes such as marathon or tights for cross-country running, tights, shirts, ice-skating clothes, ski clothes, jumpsuits, tights, soccer suits, baseball uniforms, and mountaineering clothes, as well as clothing such as sports underwear and underwear having a support function, and protectors, as well as swimsuits.

Description of the reference numerals

1 swimsuit cloth

2 concave stripe part

3 convex part stripe part

4 independent concave patterns

5 body length direction (height direction)

20. 22 swimming suit

21. 23 stripe pattern

31 cylindrical base (model)

32 swimsuit cloth

33. Front end of model 46

34 back end of the model

40 frictional resistance measuring device

41 sink

42 water

43 Shielding piece

44 Lamp

45 high-speed camera

47 laser spot

48 1 st measurement point

49 2 nd measurement point

Claims (13)

1. A swimsuit, which is made of a stretchable cloth subjected to water repellent treatment,

at least a part of the resin composition comprises a stripe pattern in the body length direction,

the stripe pattern includes a concave stripe portion and a convex stripe portion,

the convex rib portion has an independent concave pattern.

2. Swimsuit according to claim 1,

the bottom of the independent concave pattern is shallower than the bottom of the concave stripe portion.

3. Swimsuit according to claim 1 or 2,

the independent concave patterns are rectangular and arranged with diagonal lines along the length direction.

4. Swimsuit according to claim 1 or 2,

the independent concave patterns are elliptical or oblong, and are arranged such that the major axis extends in the longitudinal direction.

5. Swimsuit according to any one of claims 1 to 4,

the independent concave patterns are regularly arranged.

6. Swimsuit according to any one of claims 1 to 5,

the recessed rib portion and the independent recessed pattern are embossed patterns.

7. Swimsuit according to any one of claims 1 to 6,

one of the independent concave patterns has an area of 0.05 to 5mm²。

8. Swimsuit according to any one of claims 1 to 7,

the stripe pattern and the independent concave pattern in the convex stripe portion are formed over the entire surface of the swimsuit or in an area ratio of 50% or more.

9. Swimsuit according to any one of claims 1 to 8,

the widths of the concave stripe part and the convex stripe part are respectively 3-15 mm.

10. Swimsuit according to any one of claims 1 to 9,

the cloth of the swimwear is a woven fabric based on a blend of synthetic fiber multifilament yarn and spandex fiber and having stretchability in both longitudinal and lateral directions.

11. Swimsuit according to any one of claims 1 to 9,

the cloth of the swimwear is a textile fabric in which a composite yarn obtained by coating spandex fibers with a synthetic fiber multifilament yarn is used as warp yarns and weft yarns.

12. Swimsuit according to any one of claims 1 to 11,

the cloth of the swimsuit has elasticity, and has an elongation of 30 to 250% in both the longitudinal and transverse directions, as measured by a slitting method in JIS L1096A, wherein a load of 17.7N, i.e., l.8kg, and a width of 5cm are used in the slitting method.

13. Swimsuit according to any one of claims 1 to 12,

the swimsuit is a swimsuit for a swimming match, and is made of a model that is about 10% to 40% smaller than a human body.