JPS5923527Y2 - shoe insole - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the insole of shoes.

There is a known shoe insole in which a film sheet having a heat-reflective metal thin film layer is attached to the back side of a urethane rubber sheet in order to improve heat retention.

However, as the material for the insole, it is preferable to use foamed vulcanized rubber, such as latex sponge, which has better elastic recovery and cushioning properties than urethane rubber, and requires fewer production steps.

However, it is very difficult to properly adhere a thin film sheet to a foamed vulcanized rubber sheet, and therefore, there is no insole in which this type of sheet is provided with a heat reflective layer.

The reason for this is that the foam vulcanized rubber sheet has good cushioning properties, so if there is a part that is compressed when the film is bonded, the surface area of that part changes, and as a result, the film does not align accurately with the bonding surface. Furthermore, even if the adhesion is successful, there is a difference in the elastic recovery force between the two, so only the film will be stretched afterwards, resulting in wrinkles in the film or areas with poor adhesion.

Here, it is possible to form the metal thin film layer directly on the back surface of the insole by vapor deposition, but in this case, the foamed vulcanized rubber sheet has a highly uneven surface, so a smooth surface cannot be obtained.
Moreover, as described above, since the metal thin film layer has good cushioning properties, it is easy to destroy the metal thin film layer at an early stage after vapor deposition.

Therefore, it is not possible to obtain something that is highly practical.

Therefore, the object of this invention is to provide an insole for shoes that eliminates these drawbacks.

This invention will be explained below with reference to the attached drawings.

The insole 1 of this invention shown in FIG. 1 consists of a foamed vulcanized rubber sheet 2 cut into a predetermined shape, and an activated carbon layer 3 for odor removal on the top surface of the foamed vulcanized rubber sheet 2 as shown in FIG. or third
As shown in the figure, the reinforcing sheet 4 is directly laminated, and the heat reflecting layer 5 formed on the back surface of the sheet 2 is separated.

As the foamed vulcanized rubber sheet 2, for example, latex sponge is used.

In addition, for the reinforcing sheet 4 on the upper surface, a non-woven fabric having the same function as a hygroscopic and/or breathable woven fabric is used, and these sheets are attached to the rubber sheet 2 through an adhesive layer (not shown). is attached to.

Next, the heat-reflecting layer 5 is formed by, for example, coating an acrylic resin solution with a paint containing fine particles of aluminum or other metals, and drying and solidifying the coating, which is a feature of the present invention.

In other words, when a heat reflective layer is formed by coating with paint, the unevenness caused by air bubbles on the surface of the foamed vulcanized rubber sheet becomes
Since the heat-reflecting layer is fully filled with paint, it has increased fracture resistance against deformation of the insole and can maintain its function for a long time.Furthermore, by applying the paint and rolling it, the surface of the heat-reflecting layer can be improved. Since it becomes possible to increase the smoothness, a heat reflective layer having a desirable shape for improving heat retention can be obtained.

The amount of metal powder mixed in the paint is, for example, acrylic resin 6
With respect to 0 volume %, it is sufficient that the remaining metal powder is about 40 volume %.

As explained above, in this invention, the heat reflective layer is formed by a paint coating containing fine metal particles, so the insole is made of a foamed vulcanized rubber sheet and has good elastic recovery and cushioning properties. However, it is possible to form a highly durable heat-reflecting layer and improve its heat retention properties.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the insole of this invention, Figures 2 and 3.
The figure is a sectional view showing a different example of the same as above. 1... Insole, 2... Foamed vulcanized rubber sheet, 3... Activated carbon layer, 4... Reinforcement sheet, 5... Heat reflective layer.

Claims (1)

[Scope of utility model registration request] A heat reflective layer is formed by coating a paint containing fine metal particles on the back side of a foamed vulcanized rubber sheet on which a reinforcing sheet with breathable and/or hygroscopic properties is laminated directly or via an activated carbon layer. The insole of the shoe.