JPH0625128Y2 - Insole for footwear - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is laid on the inner surface of the sole of footwear such as men's shoes, women's shoes or sports shoes, and has heat-retaining property, anti-wetting property, quick-drying property and The present invention relates to an insole for footwear capable of satisfying the improvement of slip resistance at the same time.

[Conventional technology]

As a conventional insole for footwear, a two-layer structure having an upper layer and a lower layer is known. Some two-layer footwear insoles have an upper layer made of a water-impermeable woven fabric such as polyvinylidene chloride and a lower layer made of a material having relatively low slip resistance. However, since the upper layer of this product is a water impermeable layer, sweat is not absorbed and remains as water droplets on the insole, which makes the sole feel wet and stuffy, and lowers heat retention. Although it takes time to dry the insole with sweat after removing it, the lower layer is made of a material with relatively low slip resistance, so the footwear insole may be misaligned when wearing shoes. Had occurred.

As a conventional technique for solving such a problem, there is an insole for footwear in which a water-absorbent knitted fabric such as cotton or hemp is used as the upper layer. This product absorbs and retains sweat in an upper layer having good water absorption, thereby reducing the feeling of wetting and stuffiness of the sole of the foot and deterioration of heat retention.

In addition, a material having relatively poor slip resistance is still used in the lower layer, and therefore, when the shoes are worn, the footbed insole is displaced.

[Problems to be solved by the device]

By the way, since the footwear insole having the water-absorbing upper layer has the two-layer structure as described above, the surface of the upper layer directly contacts the sole of the user.

Therefore, although this upper layer is not as water-impermeable as
It had a relatively damp and damp feeling on the soles of the feet, had low heat retention, and was also poor in quick-drying sweat attached to the insole.

Further, as described above, the lower layer is made of a material having a relatively poor anti-slip property, so that the footwear insole is displaced when the shoe is worn.

The present invention has been made in view of the above-mentioned conventional problems, and at the same time, it is possible to satisfy the requirements of preventing the foot from getting wet and damp, improving heat retention and quick drying, and preventing displacement of the laying position. The purpose is to provide.

[Means for Solving the Problems]

The present invention relates to a hydrophobic surface layer made of porous fibers having a large number of fine pores, through which sweat can easily permeate, a water-absorbing intermediate layer for adsorbing sweat that has permeated from the hydrophobic surface layer, and an insole footwear. The present invention provides an insole for footwear, which is obtained by sequentially laminating a non-slip base material layer for preventing slipping.

[Action]

When the insole for footwear of the present invention is laid and used in footwear,
The sweat on the sole of the foot passes through the hydrophobic surface layer composed of the porous fibers which come into contact therewith, permeates into the water absorbent intermediate layer, and is diffused and adsorbed there. At this time, a part of this sweat is transmitted through the gaps between the porous fibers and the surface of the fibers, and the rest is transmitted through a large number of fine pores formed inside the porous fibers by the capillary phenomenon to the water-absorbing intermediate layer. Penetrate.

For this reason, sweat does not easily adhere to the hydrophobic surface layer where the sole of the foot comes into contact, so that it is possible to maintain a dry feel at all times, thus improving the prevention of wetting and stuffiness of the sole of the foot, and more hydrophobic than the water absorbent intermediate layer. Since the elastic surface layer is dry, it dries quickly after taking off the footwear and has good quick-drying properties.

In addition, since a large number of fine small holes are formed inside the porous fiber as described above, heat retention can be improved by holding air in the small holes.

Furthermore, since the anti-slip base material layer has anti-slip properties, the insole for footwear placed during walking does not slip and move on the bottom surface of the shoe.

The present invention is an insole for footwear that can satisfy all of these requirements at the same time.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples.

In describing this embodiment, an insole for footwear for men's shoes will be taken as an example.

First, the insole for footwear according to the first embodiment of the present invention shown in FIGS. 1 to 3 will be described.

The insole A for footwear of the first embodiment is an insole having a foot shape as shown in FIG. 1, and as shown in FIG. 2, a hydrophobic surface layer 10, a water-absorbing intermediate layer 20 and The non-slip base material layer 30 is provided.

The hydrophobic surface layer 10 is a layer which is an upper layer of the insole A for footwear, and is made of a material such as porous fiber 11 having many fine small holes 11a as shown in FIG. Layered or multi-layered.

Examples of the material of the hydrophobic surface layer 10 include wool, acrylic fiber, polyester fiber (polyethylene terephthalate, polybutylene terephthalate, etc.),
A porous fiber 11 made of a material such as polyamide fiber (nylon 6, nylon 6,6, etc.) and a blend thereof can be used. In the first embodiment, a porous acrylic fiber (for example, manufactured by Kanebo Ltd.) is used. , Aquaron) is used.

The porous fiber 11 referred to here has a large number of small holes inside and on the surface of the fiber, and indicates that it has a structure that easily absorbs and disperses moisture and water vapor by a capillary phenomenon.

Further, in the hydrophobic surface layer 10 of the first embodiment, the bore is adopted as the fiber assembly structure in order to improve the heat retaining property, but the structure is not necessarily limited to this, and for example, high pile, French pile or brushed. Other napped fiber materials such as tricot and other woven fabrics, knitted fabrics and non-woven fabrics can be used, but napped fiber materials are preferably used from the viewpoint of heat retention.

Moreover, the length of the porous fiber 11 of the first embodiment is 0.5.
.About.20 mm, especially 2 to 10 mm is preferred, and if it is less than 0.5 mm, short hair becomes short and the heat retaining property is reduced, and the distance between the water absorbent intermediate layer 20 and the sole is shortened. Sweat retained on 20 easily transfers to the soles of the feet, making it easier to feel wet. On the other hand, if it exceeds 20 mm, it will be uneconomical because of too long hair, and the size of the inside of the shoe due to its thickness when laid inside the shoe. There is a risk of becoming smaller.

Further, the hydrophobic surface layer 10 shown in FIG.
Antibacterial / sanitary processing that suppresses the generation of various bacteria and odors can be performed, and this antibacterial / sanitary processing is performed in the first embodiment.

Further, in order to improve the transfer of sweat to the water absorbent intermediate layer 20, a multi-layer type in which porous fibers 11 having high hygroscopicity and water absorption are laminated from the front surface side to the bottom surface side of the hydrophobic surface layer 10 is adopted. You can also In this case, in order to increase the water absorption,
For example, the porous fiber 11 may be subjected to known chemical or physical water absorption processing.

Further, the basis weight of the porous fiber 11 of the hydrophobic surface layer 10 is 70 to 1,000 g / m ² , preferably 150 to 8
Was 00g / m ^2, easily sweat is water retention in the water-absorbent intermediate layer is shifted to the sole is less than 70 g / m ^2, whereas 1,000 g /
If it exceeds m ² , the footwear becomes heavy.

Furthermore, in the first embodiment, the pile is made of Aqualon 32 /
2. The back is made of polyester fiber of 150 de, and the basis weight is 420 g / m ² , and the bore with a pile length of 6 mm is adopted.

The water-absorbent intermediate layer 20 is an intermediate layer of the insole A for footwear that absorbs sweat that has permeated the hydrophobic surface layer 10, and is, for example, rayon, water-absorbent polyester fiber, water-absorbent polyamide fiber, rayon / polyester blended fiber, A layer of woven fabric, knitted fabric, non-woven fabric, etc. made of water-absorbent fibers such as cotton and hemp. The material is particularly polyester / rayon (for example, polyester / rayon (weight ratio) = 40/60] It is preferable to use needle-punched mixed-spun fibers, or a multi-layered structure in which polyester fibers are combined on the front surface side and rayon fibers on the bottom surface to form a double structure, and this is needle-punched. In this first embodiment, a water-absorbent nonwoven fabric made by impregnating needle-punched polyester fibers with a synthetic polymer is adopted.

In addition, the material of the water absorbent intermediate layer 20 may be a synthetic fiber such as polyester fiber or polyamide fiber that has been subjected to known chemical or physical water absorption processing.

The degree of water absorption of the water absorbent intermediate layer 20 is preferably about 3 cc / hr or more, which is the amount of perspiration of a general adult male, and the water absorbent intermediate layer 20 has the hydrophobic surface layer 1
As with No. 0, antibacterial / sanitary processing can be applied to suppress the generation of mold, bacteria and odor. Further, in order to improve the adsorption of sweat, the intermediate layer 20 is made into a multilayer by using fibers having high hygroscopicity and water absorption from the surface side to the bottom side, or gradually absorbs water from the surface side to the bottom side. It is also possible to mix other fibers having high properties.

Furthermore, by appropriately impregnating the water-absorbing intermediate layer 20 with a synthetic rubber, a starch-based grafted product, a cellulose-based grafted product, a synthetic polymer such as polyacrylic acid, polyvinyl alcohol, polyethylene oxide, or the like, this layer The hardness, hygroscopicity, and water absorbency can be adjusted appropriately, and the water absorbent intermediate layer 20 can be made to have an appropriate hardness to give the footwear insole A shape retention and cushioning properties.

The thickness of the water absorbent intermediate layer 20 is 0.5 to 4 mm, preferably 1 to 2 mm. If it is less than 0.5 mm, the cushioning property and rigidity are poor, and the water absorbing amount is saturated in a short period of wear. On the other hand, if it exceeds 4 mm, the size of the shoe becomes small, which is inconvenient to wear.

Further, the weight per unit area of the fibers of the water absorbent intermediate layer 20 is 200
~600g / m ^2, preferably from 300 to 500 g / m ^2, is less than 200 g / m ² may be deformed when wearing insufficient hardness and rigidity, whereas only heavy exceeds 600 g / m ² It is uneconomical in terms of cost.

As mentioned above, the amount of human sweating is about 3 for adult males.
Since it is considered to be about cc / hr, it is also effective to adjust the basis weight in consideration of the use of the footwear to be used.

Further, the thickness of the filament of the fiber of the water absorbent intermediate layer 20 is 1 to 10 de, preferably 3 to 6 de.

As shown in FIG. 2, the slip-resistant base material layer 30 is a single-layer or multi-layer footwear insole A made of, for example, synthetic rubber, natural rubber, polyurethane foam, polyvinyl chloride foam or the like having slip resistance. In the first embodiment, the sweat that has migrated from the water absorbent intermediate layer 20 is further diffused to the lower layer, and the drying speed is increased. In addition, the cushioning property, the heat retaining property, the slip resistance, and the like are taken into consideration. It adopts polyurethane foam with open cells.

In addition, at least the bottom portion of the non-slip base material layer 30 that comes into contact with a shoe sole (not shown) has anti-slip properties. For example, polyurethane, polyvinyl chloride, ethylene-vinyl acetate may be provided on the bottom surface of a woven fabric or a non-woven fabric. It may be formed by fusion-bonding protrusions made of a synthetic resin such as a copolymer or synthetic rubber.

The anti-slip base material layer 30 preferably has a large friction coefficient in order to provide good anti-slip properties.

The thickness of the anti-slip base material layer 30 is 1 to 5 mm, preferably 2 to 4 mm. If the thickness is less than 1 mm, the anti-slip property is poor and the heat retaining property is poor. The size will be reduced.

The hydrophobic surface layer 10, the water-absorbent intermediate layer 20, and the anti-slip base material layer 30 may be laminated, for example, by partial or point adhesion with an adhesive, laminating by frame lamination, sewing, or needle punching. It is appropriately implemented by a laminating means such as.

In using the footwear insole A of the first embodiment, the footwear insole A shown in FIG. 1 is inserted into a shoe (not shown) and laid on the bottom of the shoe, and then the shoe is put on. When walking, sweat on the sole of the foot passes through the contacting hydrophobic surface layer 10 shown in FIG. 2 and permeates into the water absorbent intermediate layer 20, where it is diffused / adsorbed and retained.

At this time, a part of this sweat is transmitted through the gaps between the porous fibers 11 and the surface of the fibers 11, and the rest is the porous fibers 1.
1. A large number of fine small holes 1 shown in FIG.
1a penetrates into the water-absorbing intermediate layer 20 through the capillary phenomenon.

Therefore, the hydrophobic surface layer 1 shown in FIG.
In 0, sweat is hard to adhere to and can maintain a smooth touch at all times, and therefore, it is possible to improve the prevention of wetting and stuffiness of the sole of the foot, and since the hydrophobic surface layer 10 is dry rather than the water absorbent intermediate layer 20, It also dries quickly after taking off the shoes and has good quick-drying properties.

Furthermore, as described above, inside the porous fiber 11, the third
Since many fine small holes 11a shown in the figure are formed, heat retention can be improved by holding air in the small holes 11a.

Furthermore, since the anti-slip base material layer 30 shown in FIG. 2 has anti-slip properties, the footwear insole A laid during walking does not slip and move on the bottom surface of the shoe.

As described above, in the insole A for footwear of the first embodiment, the hydrophobic surface layer 10 made of porous fiber 11 having a large number of fine small holes 11a, through which sweat can easily pass, and the hydrophobic surface layer 10. Since the water-absorbing intermediate layer 20 that absorbs sweat that has permeated from the elastic surface layer 10 and the slip-resistant base material layer 30 that prevents the slipping of the insole A for footwear in the shoe are sequentially laminated, the soles of the foot are wet and damp. At the same time, it is possible to satisfy the requirements for prevention, heat retention and quick-drying, and prevention of displacement of the laid position.

Further, in the first embodiment, since the bore is adopted in the fiber aggregate structure of the hydrophobic surface layer 10, the heat retaining property is further excellent.

Next, a second embodiment of the insole for footwear of the present invention will be described.

As shown in FIG. 4, the footwear insole B of the second embodiment has an adhesive layer 40 made of polyurethane foam laminated between the hydrophobic surface layer 10 and the water absorbent intermediate layer 20. However, without being limited to this, other adhesive layers such as a solvent type whose base is made of rubber or urethane prepolymer may be used.

Further, the thickness of the adhesive layer 40 is preferably 0.3 to 2.0 mm, particularly preferably 0.3 to 1.0 mm. If it is less than 0.3 mm, the adhesive force is weak, while if it exceeds 1.0 mm, it is uneconomical. .

At this time, the method for laminating the porous fibers 11 constituting the hydrophobic surface layer 10 is as follows. The adhesive layer 40 is placed on the water-absorbing intermediate layer 20 laminated on the anti-slip base material layer 30 by a well-known method. Then, these are heated from the side of the adhesive layer 40 to bring the adhesive layer 40 into a molten state, and then a predetermined amount of the porous fiber 11 is placed on the adhesive layer 40 in the molten state and this is applied. It is done by pressure pressing.

The other configurations and operations of the footwear insole B of the second embodiment are the same as those of the footwear insole A of the first embodiment, and the description thereof will be omitted.

The embodiment of the present invention has been described above. However, the specific configuration is not limited to this embodiment, and even if there is a design change within the scope of the present invention, the present invention is included.

For example, in the examples, an insole for footwear for men's shoes is shown as an example, but the invention is not limited to this, and can be used for other insoles for footwear such as women's shoes, sports shoes, or boots. Is.

[Effect of device]

According to the present invention, by laying and using it in the footwear, the sweat on the sole of the foot passes through the hydrophobic surface layer which comes into contact therewith and permeates into the water absorbent intermediate layer, where the sweat is diffused and adsorbed. However, at this time, part of the sweat permeates the water-absorbing intermediate layer through a large number of fine pores formed inside the porous fiber by capillary action, so that the hydrophobic surface layer with which the sole of the foot comes into contact. The sweat is less likely to adhere to the skin, and the dry feel can be maintained at all times. Therefore, it is possible to improve the prevention of wetness and stuffiness of the sole of the foot.

In addition, since the hydrophobic surface layer is drier than the water-absorbing intermediate layer, it is possible to obtain an effect that the material dries quickly after taking off the footwear and has a good quick-drying property.

Furthermore, since a large number of fine small holes are formed inside the porous fiber as described above, heat retention can be improved by holding air in these small holes.

Furthermore, since the anti-slip base material layer has anti-slip properties, it is possible to prevent the footbed insole placed during walking from slipping and moving on the bottom surface of the shoe.

The present invention can satisfy these at the same time.

[Brief description of drawings]

1 to 3 show an insole for footwear according to a first embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is an enlarged vertical sectional view, and FIG. 3 is for footwear according to the first embodiment. FIG. 4 is an enlarged perspective view of the porous fiber used for the insole, and FIG. 4 is an enlarged vertical sectional view of the insole for footwear according to the second embodiment of the present invention. 10; Hydrophobic surface layer 11; Porous fiber 11a; Small pores 20; Water-absorbing intermediate layer 30; Anti-slip base material layer

Claims (1)

[Scope of utility model registration request] 1. A hydrophobic surface layer made of porous fibers having a large number of fine pores for easily permeating sweat, a water-absorbing intermediate layer for adsorbing sweat that has permeated from the hydrophobic surface layer, and footwear for an insole. An insole for footwear, comprising an anti-slip base material layer for preventing internal slippage, which is sequentially laminated.