JPH0260601A - Heat insulation rubber-soled 'tabi' (socks) - Google Patents

Abstract

PURPOSE:To obtain an excellent heat insulating effect and to maintain the delicate feel on the sole of a foot by using a non-woven fabric consisting of at least hollow fibers and thermally welded fibers as a part of a sole constituting material. CONSTITUTION:The heat insulating rubber-soled 'Tabi' (socks) for working in an elevated place are produced by using a sole type rubber sheet, the non-woven fabric consisting of the hollow polyester fibers and the thermally welding type polyester/ polyethylene core/sheath fibers and having 2.8mm thickness and 185g/m<2> (METSUKE) and further the Swedish woven cotton fabric having 290g/m<2> (MESTUKE) in combination as the sole material and using the materials for the rubber-soled 'Tabi' (socks) for the other parts. Namely, the air capacity in the non-woven fabric is increased further by as much as the quantity of the air contained in the hollow parts by using the hollow fibers. A good air retaining property is obtd. and the max. possible heat insulating effect is exhibited. The use of the thermally welded fibers as the binder to enhance the intertwining property of the non-woven fabric is advantageous in that the filling of the gaps among the fibers by the binder is obviated and that the elasticity to withstand the body weight is imparted to the sheet. The air volume per unit volume of the sheet is, therefore, maximized.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a jikatabi with excellent heat insulation effect, which uses a nonwoven fabric made of specially structured hollow fibers and heat-fused fibers in the bottom part.
By wearing the insulating jikatabi, you can comfortably work for long periods of time in places where heat is generated under your feet, such as high-altitude steel frame work or asphalt paving work.

Here, the term "bottom" refers to all bottoms other than the main sole, such as the midsole and so-called intermediate soles located between the midsole and the mainsole.

<Prior Art> Conventionally, methods for preventing high heat from the outside world from being transmitted to the sole of footwear include a method of improving the sole of footwear and a method of improving the sole. As an example of the improvement of the bottom, for example, Utility Model 51-4
9638, Utility Model 158801, and Utility Model 59
-49QH etc. There is a method of providing air holes for heat insulation in a part of the outsole. However, because the sole of this method is required to be thicker and harder than necessary due to its structure, it cannot be used for jikatabi, which requires delicate sensation on the soles of the feet, such as when working at heights, from a safety point of view.

Also, as an example of bottom improvement, for example, Utility Model 55-1094
There are methods such as using felt or rubber sponge with a special structure as in No. 02, or using a thin heat-reflecting metal sheet as a part of the structure as in Japanese Utility Model Application No. 61-51002.

However, both methods are still insufficient to block high heat from the outside world.

<Problem to be Solved by the Invention> The problem to be solved by the present invention is to use a non-woven fabric made of specially structured hollow fibers and heat-fused fibers for the bottom, which is different from the conventional non-woven fabric made of ordinary fibers and a resin binder. These insulated jikatabi have a better insulation effect than the sole, while still maintaining a delicate sensation in the soles of the feet.

<Means for Solving the Problems> The present invention is a heat-insulating jikatabi using a nonwoven fabric made of at least hollow fibers and heat-fused fibers as a part of the sole constituent material. The present invention will be explained in more detail below.

As described in the prior art section, as a method for improving soles to prevent high heat from the outside from being transmitted to the soles of footwear, sheet materials containing air layers such as felt, nonwoven fabrics made of ordinary fibers, cork, rubber sponges, or polyurethane sponges are used. There are two methods: using a heat-reflecting metal thin-layer sheet material such as aluminum foil. The former has countless voids inside these sheet materials, and the air layer filling these voids acts as a heat insulator that blocks heat from the outsole. However, the heat insulating effect of the lever is more effective as the air capacity per unit volume of the seat under weight is larger.

In the present invention, a nonwoven fabric made of a special fiber material that maximizes the above-mentioned air layer insulation effect is applied to the bottom. That is, the nonwoven fabric used in the present invention consists of hollow fibers and heat-fusible fibers. By using hollow fibers, the air capacity inside the nonwoven fabric increases by the amount of air contained in the hollow part, and since the air in this hollow part is difficult to escape from the hollow part, it has good air retention and maximizes the insulation effect. It is demonstrated to the maximum extent. Hollow fibers used in the present invention include polyester 1M fibers, nylon fibers, and the like. Furthermore, in the present invention, heat-fusible fibers are used as a binder to enhance the entangling properties of the nonwoven fabric made of hollow fibers. Since it is possible to impart elasticity that can withstand this, it is possible to maximize the air capacity per unit volume of the seat under the weight of the seat. The heat-fusible fibers used in the present invention include polyolefin fibers, heat-fusible polyester fibers, polyester core polyolefin sheath type core-sheath fibers, and the like. The ratio of hollow fibers and heat-fusible fibers constituting the nonwoven fabric in the present invention is 3-7:7-3, preferably 4-6:6-4. If the hollow fiber ratio is less than the above range, the heat insulating effect will be poor, and if the heat-fusible fiber ratio is less than the above range, the number of bonding points will be small and the morphological stability of the nonwoven fabric will be poor. In addition, the thickness and basis weight of the nonwoven fabric is 2.0~3.4ffilL 140~230g/+ for work at high places where the feeling of the soles of the feet is important.
' is optimal, and 4.0 to 7.0 mm and 300 to 500 gem' are optimal for asphalt pavement where emphasis is placed on the heat insulation effect.

In addition to using at least the above-mentioned nonwoven fabric for the sole used in the present invention,
Cotton cloth, sweat-absorbing synthetic fiber knitted fabric, polymer sponge sheet, rubber sheet, heat-reflecting metal thin-layer sheet, and other conventionally used bottom constituent materials are used in appropriate combinations. An example of the structure of the bottom is shown in FIGS. 2 and 4. Second
The figure shows an example of a combination of the above-mentioned nonwoven fabric, a cotton fabric or a sweat-absorbing synthetic fiber knitted fabric, and a rubber sheet. By placing cotton cloth or sweat-absorbing synthetic fiber knitted fabric on top of the non-woven fabric, it is possible to further prevent heat from being transmitted from the bottom, and at the same time, it absorbs sweat from the feet and releases it to the non-woven fabric underneath, eliminating stuffy feet. . Of course, it also has the effect of improving foot contact.The rubber sheet at the bottom of the nonwoven fabric also has the effect of preventing heat transfer from the bottom outsole.Figure 4 shows that the nonwoven fabric and the above This is an example of a combination sole using a cotton cloth or a sweat-absorbing synthetic fiber knitted fabric, a heat ray reflective metal thin layer sheet, and a rubber sheet. It works to prevent heat from entering.Any sheet-like material can be used as the heat ray reflective metal thin layer sheet as long as it has the effect of reflecting heat rays and has a certain degree of flexibility as a bottom constituent material.Especially A sheet prepared by coating a woven or knitted fabric made of polyester fiber, nylon fiber, cotton, etc. with aluminum powder or vapor-deposited aluminum foil, or a sheet laminated with a vapor-deposited aluminum film is effective.

EXAMPLES The present invention will be explained below using Examples, but the present invention is not limited to the Examples.

<Example 1> The bottom material consists of a bottom rubber sheet, hollow polyester fibers and heat-fused polyester-polyethylene core-sheath fibers, thickness 2.8+++m, basis weight 185g/I1.
1' non-woven fabric and a Swedish woven cotton cloth with a basis weight of 290 g/n'' on top of it, and the other parts are made of conventional jikatabi materials to create insulated jikatabi for high-altitude work. I built it.

Next, the above-mentioned insulating jikatabi of the present invention, a conventional jikatabi without non-woven fabric as a control, and a conventional non-woven fabric using ordinary fibers other than hollow fibers and a rubber latex binder as a control were used for the soles. When we tested three types of Jikatabi, alternating the left and right sides, on an iron plate under the hot summer sun, the insulated Jikatabi of the present invention could be worn even after 60 minutes, while the conventional Jikatabi could be worn even after 60 minutes. After 10 minutes with Jikatabi, and 20 minutes with conventional Jikatabi using non-woven fabric, the soles of the feet became so hot that it was impossible to continue wearing them.

<Example 2> The bottom material consists of a rubber sheet, an aluminum powder-coated polyester fiber fabric, a hollow polyester fiber, and a heat-sealable polyester-polyethylene core-sheath fiber, with a thickness of 5.5 mm.
(2) A non-woven fabric with a basis weight of 400 g/m'' and a sweat-absorbing polyester knitted fabric were used in this order, and the other parts of the jikatabi were made of conventional materials to make an insulating jikatabi for asphalt pavement.

Next, we tested the insulating jikatabi of the present invention and the conventional jikatabi that do not use non-woven fabric as a control, alternating the left and right sides, at an asphalt pavement construction site under the scorching midsummer sun. The right foot wearing the invented insulated jikatabi has less heat and can be continued to be worn even 15 minutes after wearing it, while the left foot wearing the conventional jikatabi can be worn for 5 minutes.
After a few minutes, the heat became so intense that it was difficult to continue wearing it any longer.

<Effects of the Invention> The insulated jikatabi of the present invention can effectively block the hot air from the outside world from entering the bottom part, so even if you work in a place where heat generation is intense, intense heat will not accumulate inside the jikatabi. , it can be worn continuously for a long time, and work can be continued for a long time.

In winter or in cold places, the insulation effect will conversely keep your feet warm.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the insulating jikatabi of the present invention, Fig. 2 is an enlarged sectional view showing the material composition of the bottom portion thereof, and Fig. 3 is a cross-sectional view showing an example of the insulating jikatabi of the present invention. FIG. 4 is a sectional view showing an example, and FIG. 4 is an enlarged sectional view showing the material composition of the bottom portion thereof. 1...Nonwoven fabric made of hollow fibers and heat-fused fibers 2...Cotton fabric or polyester knitted fabric 3
......Heat ray reflective metal thin layer sheet 4...
・・・・・・Bottom comunto 5・・・・・・・・・・Comm bottom 6・・・・・・・・・・Remarks on the drawings above Yoshifu (No change in content) Figure 1 Figure 2 Patent applicant Nissin Rubber Co., Ltd. Procedural amendment (method) Display of the case Japanese Patent Application No. 1983 212835 2, Name of the invention Relationship with the case of the person who corrects insulated jikatabi

Claims (3)

[Claims] (1) A heat-insulating jikatabi using a nonwoven fabric made of at least hollow fibers and heat-fused fibers as a part of the sole constituent material. (2) The insulating jikatabi according to claim 1, wherein a nonwoven fabric made of hollow fibers and heat-fused fibers and a thin heat-reflecting metal sheet are used in combination as a part of the sole constituent material. (3) The insulating jikatabi according to claim 1 or 2, wherein the hollow fibers are hollow polyester fibers, and the heat-fusible fibers are polyolefin fibers, heat-fusible polyester fibers, or polyester-polyolefin core-sheath fibers.