JP4017554B2 - Fluid resistance reduced swimsuit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a swimsuit for swimming, and not only reduces surface friction resistance in water by providing a water repellent part on the surface of the swimsuit, but also provides water by providing a non-water repellent part or a hydrophilic part. The present invention relates to a novel fluid resistance-reducing swimsuit that also ensures the ability to pull out.
[0002]
[Prior art]
Conventionally, in order to reduce the surface friction resistance in water that is most required in swimsuits for swimming, there are not a few examples of applying water-repellent print processing or sticking water-repellent sheets to the swimsuit surface, For example, the technique disclosed in Japanese Patent Laid-Open No. 9-49107 is a typical example, and the resistance is reduced by dividing the water-repellent part and the non-water-repellent part in a stripe shape on the surface of the swimsuit.
[0003]
In addition, there is a conventional technique in which a water repellent finish is applied to the entire surface of the swimsuit, but among these, water that has entered from the opening of the swimsuit collar or the like cannot be removed to the outside, that is, Even if the surface frictional resistance reducing function can be sufficiently exerted, the disadvantage in terms of water drainage will be noticeable as described above, and on the contrary, the resistance will increase. In many cases, it was actually unsuitable for use.
[0004]
In addition, there is a conventional technique in which water repellent processing is applied to the entire swimsuit surface while at the same time ensuring water drainage.
In other words, this is a technique in which the knitting structure is roughened by means of needle removal to provide a water flow effect. However, according to this technique, not only a troublesome process of needle removal is indispensable, but also the case where the needle removal is not uniform is likely to occur, or the knitting structure is bothered to roughen the overall swimsuit. The weak point that a weak part was inevitably made from a strong point of view still occurred.
[0005]
FIG. 3 shows a typical example of the prior art in an enlarged cross-sectional view (Japanese Patent Laid-Open No. 9-49107). The water repellent 52 is partially (this surface only) on the upper surface (only the surface) of the fabric 51. The portion that is printed (in the case of stripes) and the water repellent 52 is not printed is a non-water-repellent portion 53.
However, this type of conventional technology only uses a water-repellent agent such as silicon or fluorine on the surface of the swimsuit, and only forms a water-repellent portion by a printing process that is generally industrialized. Therefore, due to natural deterioration over time or deterioration due to external causes such as friction in washing, peeling, etc., sufficient water repellency cannot be expected. The problem of becoming a water repellent part still remained.
Furthermore, in terms of water repellency, since the non-water-repellent part generally uses polyester or the like, it has been a result that water does not easily escape due to the characteristics of these materials.
[0006]
In addition, the water-repellent agent often oozes out in the water-repellent printing process, and it cannot be denied that the non-water repellency of the non-water-repellent part cannot be secured sufficiently ( That is, the non-water repellent part also results in a water repellent function).
[0007]
In particular, it was extremely difficult to form the non-water repellent part as a thin line. That is, the non-water-repellent function is almost lost because the water-repellent oozes into the narrow non-water-repellent portion.
[0008]
In the case of deterioration over time, i.e. deterioration of water repellency function due to long-term wearing, or deterioration due to external factors, i.e. deterioration of water repellency function due to washing, etc. The result was that it was difficult to distinguish, and there was a serious problem that resistance did not decrease.
[0009]
[Problems to be solved by the invention]
In order to eliminate the drawbacks of the prior art described above, the present invention has not only a small number of steps (for example, needle removal), but also no unevenness in strength, and a narrow non-repellency. As a swimsuit that does not lose its non-water repellent function even when a water part is provided, even if the water repellent part is subject to natural deterioration over time or deterioration due to some external cause, the fluid resistance is reduced. We have developed an epoch-making fluid resistance-reducing swimsuit that can sufficiently maintain water drainage and at the same time function well.
[0010]
【means】
In the present invention, first, a hydrophilic process is first applied to an arbitrary position of a swimsuit fabric having elasticity as appropriate, and then a water repellent process is performed over the entire upper surface of the surface of the swimsuit fabric subjected to the hydrophilic process. This is the gist.
The formation of the hydrophilic processed portion may be performed by conventional techniques, but the gist of the present invention is that the hydrophilic processed portion is preferably printed by using an appropriate synthetic resin such as acrylic or urethane as a binder.
In addition, the entire water-repellent process is not a print process as in the prior art but is performed by immersing the entire fabric in a water-repellent agent.
[0011]
In addition, the hydrophilic processed portion is also characterized by having an arbitrary shape such as a stripe or an arbitrary size.
The binder is also a hydrophilic part that always absorbs a certain amount of water and contains the water. In this case, water exceeding the water content limit or a predetermined amount of the hydrophilic part, that is, the absorption capacity of the hydrophilic agent. Water exceeding the range is no longer contained in the hydrophilic part and is excluded outside the swimsuit, and is not contained in the hydrophilic part.
[0012]
As used herein, the term “water repellent or water repellent layer for the entire swimsuit” means that the entire circumference or substantially the entire circumference of the warp and weft itself constituting the fabric is water repellent. (To be more precise, only in the case of a thread in which a partially provided hydrophilic portion does not exist on the surface, see this point drawing).
That is, it does not mean that a thin film layer is formed on the entire knitted surface (as if the cloth is completely covered by the presence of the layer).
In other words, the water repellent finish is applied only to the entire circumference of the yarn itself, to be exact only the entire circumference, and the gap of the knitting structure still remains. I want to clarify here.
[0013]
【Example】
An exemplary embodiment of the invention will now be described with reference to FIG.
First, reference numeral 1 is a swimsuit fabric that has been appropriately stretched and has been widely adopted as a conventional swimsuit. Examples of the material include synthetic fiber multifilament yarns such as polyamide, polyester, and polypropylene, or their synthesis. It consists of a knitted fabric made by knitting fiber multifilament yarn and polyurethane elastic yarn.
[0014]
Reference numeral 2 denotes a hydrophilic processed portion that appropriately exhibits a stripe shape or other arbitrary shape or size at an arbitrary position of the fabric 1 itself.
[0015]
For the formation of the hydrophilic processed portion 2, printing processing is adopted from among hydrophilic processing that has been widely performed in general.
That is, according to this processing means, for example, a synthetic roller can be applied and processed by using a general roller machine, an auto screen machine, a hand screen machine, etc., using acrylic or urethane as a binder as appropriate, It will be closely integrated with 1 ′, 1 ′.
Of course, a so-called hydrophilic agent appropriately selected is mixed in the binder.
As the hydrophilic agent, a solution such as a commonly used water-soluble polymer is appropriately adopted.
[0016]
The hydrophilic processed portion 2 is an acrylic or urethane synthetic resin, and not only the water repellent layer 3b described below that covers the entire hydrophilic portion is extremely thin. Water that has entered from the outside (the body surface side) always contains water, and the water that has entered from the outside and accumulated in the middle between the swimsuit and the body is the gap between the yarns, that is, the gap between the knitted tissues. All the water is sucked up to the hydrophilic processed portion 2 by the so-called capillary phenomenon (as if the hydrophilic processed portion 2 becomes priming water) and flows out of the portion 2 (water repellent as described later) Since the thin portion 3b of the layer 3 is extremely thin, this does not hinder the outflow), that is, the water draining action is sufficiently generated, so that the water drainage from the back surface of the fabric 1 is also sufficiently secured. (I.e., if the hydrophilic processed part 2 is not present, By capillary action, although once through the gap of the yarn and the yarn is sucked up, the equivalent amount rather than necessarily all sucked up is from being naturally becomes possible thereby Shitachi.)
[0017]
Next, reference numeral 3 denotes a water repellent layer formed on the entire circumference of the fabric 1 (or on the exact whole circumference of each yarn as described above, see FIGS. 1 and 2). To form the layer 3, the above (
[0005] In accordance with the process of immersing the entire fabric 1 that has undergone the above-mentioned first process in the water-repellent liquid as it is, regardless of the printing process or coating process that has been adopted by the prior art (as described above). Done.
[0018]
As a material for the water repellent liquid, a commonly used silicon-based or fluorine-based water repellent is arbitrarily selected. As long as it is a treatment agent to be generated, the name is not limited, so it is not listed one by one.
[0019]
The water repellent layer 3 includes a thick coating layer 3a and an extremely thin coating layer 3b.
That is, normally, the well-known anchor effect and grip effect allow the water repellent agent to enter the yarns 1 ′, 1 ′,... Since the binder and the water repellent agent are in a so-called incompatible relationship, that is, because they are not hydrophilic, both the anchor effect and the grip effect are less likely to occur, Therefore, the water repellent is less likely to get entangled with the fibers in the yarn 1, and as a result, the hydrophilic processed portion 2 is compared with the coating layer 3 a of the other portion (which is of course very thin). As a result, only a very thin coating layer 3b is formed.
[0020]
According to the swimsuit of the present invention thus formed,
The disadvantages of the prior art as described above, that is, the non-water-repellent part due to the knitted fabric of polyester and polyurethane is inferior in water permeability due to the characteristics of the material itself, and the repellent property due to printing. In water processing, the water repellent is only attached to a part of the surface of the yarn (only the upper surface, not the entire circumference) and is poor in the first place (in the present invention,
As described above, the water repellent adheres to all or almost the entire surface of the yarns 1 ', 1'. When the print part deteriorates or peels off, the water-repellent function is immediately lost, and the water is immediately and directly infiltrated into the swimsuit fabric itself, thereby eliminating the disadvantage that the function of reducing fluid resistance is immediately lost. Further, even when the non-water-repellent part is narrow, the water-repellent liquid does not ooze into the non-water-repellent part, so that the narrow non-water-repellent part is sufficiently maintained and functions. The advantage that the hydrophilicity of the part can be maintained can be exhibited.
[0021]
In other words, even if the surface water-repellent processing function of this example is deteriorated due to an external reason such as the above, for example, washing, the lowered portion becomes hydrophobic. The hydrophilic part can maintain the hydrophilicity as it is, and the difference between the hydrophobic part and the hydrophilic part is maintained.
[0022]
Unlike the prior art, the entire swimsuit is subjected to water repellent treatment by immersing the entire swimsuit partially hydrophilically processed as the first process in the water repellent liquid at the stage of the second process. However, the ultrathin portion 3b in the water-repellent layer is of course also thicker than 3b, but the thickness is only a few microns at most. Since it is formed only as a thin film or layer, the weight of the entire swimsuit does not increase to the extent that the wearer cares, i.e., the wearer is not particularly aware of the weight. .
[0023]
In the above process, a water-repellent layer is formed not only on the swimsuit surface but also on the entire back face of the swimsuit. As described above, the accumulated water is caused by the capillary phenomenon between the yarns (gap in the knitted structure). It is sucked up to the hydrophilic processed part 2 (see that the surface water-repellent film of the hydrophilic processed part 2 is extremely thin) and flows out from the part further to the outside, that is, sufficient drainage is ensured. It will be. In other words, it is possible to ensure water drainage through the gaps in the knitted structure, and the presence of the water-repellent thin film layer on the back surface has the advantage of being excellent in quick-drying, but there are drawbacks in terms of frictional resistance and water drainage. There is practically no such thing.
[0024]
【The invention's effect】
As described above, according to the present invention, the water repellent agent does not permeate into the non-water repellent part having a particularly narrow width, and the function of the non-water repellent part is not lost. Even when the water-repellent function as a whole decreases due to factors, the hydrophilic portion can still maintain hydrophilicity, whereas the decreased portion becomes hydrophobic. Differences in parts will remain. Therefore, as a result, especially in the current swimming race competing for 1 / 100th of a second, the fluid resistance reducing function is sufficiently exerted, so that it has an extremely excellent influence.
[Brief description of the drawings]
FIG. 1 shows a state in which a swimsuit according to the present invention is enlarged in cross section.
FIG. 2 is a cross-sectional view showing a further enlarged main part of a swimsuit according to the present invention.
FIG. 3 shows the same state of a conventional typical water repellent swimsuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cloth 1 ', 1' ... Yarn 2 Hydrophilic part 3 Water repellent layer 3a Thick water repellent layer 3b Thin water repellent layer

Claims (5)

Provide a partial hydrophilic processing part made of any shape such as stripes on the surface of the swimsuit fabric having elasticity,
Water-repellent treatment was applied over the entire top surface of the swimsuit fabric provided with the partially hydrophilic processed portion;
Featuring reduced fluid resistance swimsuit. Water-repellent treatment was performed on the entire surface of the swimsuit fabric by means of penetrating the entire water-repellent fabric with the partially hydrophilic processing portion into the water-repellent agent;
The fluid resistance-reducing swimsuit according to claim 1. The formation of the hydrophilic processing portion is performed by printing using a synthetic resin as a binder, or by applying and processing using a synthetic resin as a binder,
The fluid resistance-reducing swimsuit according to claim 1. The synthetic resin binder forming the hydrophilic processed part is acrylic or urethane,
The fluid resistance-reducing swimsuit according to claim 3. The hydrophilic processed part is not only a stripe shape but also an arbitrary shape or an arbitrary size,
The fluid resistance-reducing swimsuit according to claim 1, wherein the fluid resistance is reduced.

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