JPH09285305A - Rubber out sole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an appearance closer to the skin and a moist feel by forming a skin like coating of specified thickness after having got foamed by heating up the foaming coating material on the surface of a rubber out sole. SOLUTION: Apply specified quantity of transparent foaming coating material adjusted in advance on the surface of a pointed rubber sheet using a role coater and heat it up in an oven to get foamed. Thus, a processed rubber sheet composed of a foaming layer of 15-1000μm thickness having a skin like surface is now used as finished product looking like a skin thanks to a printed surface looked through the transparent surface layer as well as a shape of the foaming layer. Further thanks to a flexible rugged face, a moist feel proper to a shoe out sole is given here, An out sole 1 is obtained by cutting it out to an out sole shape. Thus fabricated rubber sheet is glued on to a shoe and whole the surface of the out sole 1 is made to a foaming material coating surface 4. It appropriately fits to ladies' pumps likely to have various designs on outer skins 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber sheet for shoe soles, and more particularly to a rubber sheet for shoe soles that has an appearance resembling leather, has a soft feel, and has gripping properties.

[0002]

2. Description of the Related Art Conventionally, rubber sheets used for shoe soles have been required to have high fashionability appealing to consumers' willingness to purchase. In particular, women's shoes have a wide variety of designs and materials on the skin side. Rubber sheets for shoe soles are also required to have various designs that can match them.

As a conventional rubber sheet for shoe soles manufactured from such a point of view, a vulcanization mold surface is molded with a pattern such as a mirror surface, a textured surface, or a textured surface, and a foreign substance is contained in the rubber. It is known that a mixture obtained by molding and mixing, and a product printed on the surface of a rubber sheet.

However, the leather-like surface layer formed on the above-mentioned conventional rubber sheet for shoe soles has a visually flat surface and is cold in appearance.
The skin had a smooth feel like a resin surface, and was insufficient as a leather-like surface layer of a shoe sole.

In order to solve this problem, for example, a film is attached to the surface of a rubber sheet so as to eliminate the smooth feel of the resin surface (Japanese Patent Publication No. 55-7).
No. 243), and a proposal in which the top coat layer is provided with irregularities, etc., but it has not been sufficient.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides a rubber sheet for shoe soles, which has an appearance very similar to leather and is soft to the touch. It was made for the purpose.

Another object of the present invention is to provide a rubber sheet corresponding to the design and material of the epidermis side, in particular a novel rubber sheet for shoe soles which can correspond to the epidermis side design of a wide variety of women's shoes. It is in the place of providing.

[0008] Another object of the present invention is to provide a rubber sheet for shoe soles, which satisfies the above high fashionability and has gripping property.

[0009]

One of the features of the rubber sheet for shoe soles according to the present invention, which has been made to achieve the above object, is to form a coating on a part or the entire surface of the rubber sheet for shoe soles. The foamable paint layer is heated and foamed to give a film thickness of 15 to 10.
It is characterized by having a leather-like surface layer of 00 μm.

The above-mentioned foamable coating layer is generally preferably formed by coating the foamable coating layer with 5 to 100 g / m ² (dry weight).

In the above construction, the rubber sheet used for the shoe sole can be used without particular limitation as long as it is a conventionally used rubber sheet. For example, NR, SBR, BR, EPDM, EV
A and the like can be exemplified, and NR and SBR are particularly preferable.

The "foaming paint" applied to the rubber sheet is a mixture of an elastic urethane resin binder having a skeleton of polyester, polyether, polybutadiene, etc. and a thermally expandable foam capsule, or What is further added with urethane beads and mixed therein, generally, a mixture of 10 to 500 parts by weight, preferably 50 to 200 parts by weight of the foam capsule is used with respect to 100 parts by weight of the urethane resin binder. In the case of mixing urethane beads with 10 to 400 parts by weight, preferably 5 parts by weight, per 100 parts by weight of the urethane resin binder.
The mixture is a mixture of 0 to 300 parts by weight. The foaming paint may be colored, colorless, transparent, or the like, but a colorless or colored transparent or semi-transparent paint is preferably used to make the most of the underlying print pattern. An opaque material is used to make the most of it.

In the above-mentioned foamable coating composition, if the blending ratio of the foam capsule is small, there is a problem that the cushioning feeling is insufficient. Is preferred.
Further, it is not necessary to add the urethane beads, but in the case of adding, if the compounding ratio exceeds 400 parts by weight, the tendency of deterioration of the sticking strength and the physical properties of the film becomes large, so that it is preferable to set it within the above range. . The urethane beads are preferably transparent or translucent, but may be colored.

[0014] The foamable paint foamable coating layer formed by using, in general 5 to 100 g / m ^2, preferably as a coating amount of 10 to 60 g / m ^2, heating foamed allowed to leathery The thickness of the film used as the surface layer is 15 to 1000 μm, preferably 15 to 500 μm. If the amount of paint adhered or the film thickness is small, the amount of foaming will be small, which will cause the problem that the entire area of the foamable paint layer cannot be made uniform. Conversely, if it is too large, the coating strength will be weak and scratches will occur during the shoe manufacturing process. Since it is not preferable because it is easy to do so, the above range is set.

As the coating method, a conventionally known method such as a spray method, a roll coater method or a flow coater method can be appropriately selected and adopted.

The foaming treatment of the foamable paint is not particularly limited, and may be oven heating, infrared heating, press heating,
A method such as roll heating can be appropriately adopted.

The above-mentioned "leather-like surface layer" in the present invention may be buffed after foaming by heating. By doing so, the foamed cells can be destroyed and a raising effect can be obtained, and a suede tone can be obtained. The advantage is that the surface of The "buffing" in the present invention can be carried out by rotating roll type cloth buffing, brush polishing and the like. Further, the "leather-like surface layer" that has been buffed can be further pressed to form uniform unevenness on the surface. Pressing is performed at a relatively low temperature (20-1
It is carried out by heating and compressing at (00 ° C.).

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a rubber sheet for shoe soles of the present invention will be described below with reference to production examples thereof.

Embodiment 1 For example, NR which is vulcanized and molded by pressurizing and heating in a predetermined mold
The surface of the rectangular rubber sheet (generally about 4 mm in thickness) (the surface that will be the surface of the shoe sole) is treated with a roll coater, followed by a ground coat treatment with a flow coater and a print treatment with offset printing to obtain a predetermined A rubber sheet on which a pattern is printed is obtained.

Next, a predetermined amount of the colorless and transparent foamable coating material prepared in advance is coated on the printed surface of the rubber sheet by using a roll coater and placed in an oven to heat and foam.

The obtained rubber sheet having a leather-like surface layer consisting of a foam layer having a film thickness of 15 to 1000 μm can be directly used as a product, and can be used as a printed surface printed on a rubber sheet observed through a transparent surface layer. A rubber sheet for a shoe sole, which has an appearance resembling leather due to the shape of the foamed layer, and has a leather-like surface layer with soft irregularities, is soft to the touch. The rubber sheet obtained as described above is cut into a shoe sole shape and used as a shoe sole.

Further, the above foamed layer can be buffed by a cloth buffing device to obtain a product, and in this case, a suede-like feel can be obtained in the surface layer.

Further, the surface layer after the buffing is subjected to press working using a low temperature press machine or the like to obtain a product, and in this case, the suede-like surface unevenness is constantly obtained.

1 and 2 show a state in which the rubber sheet for shoe soles manufactured in this manner is attached to a shoe, and FIG. 1 shows the sole 1
The entire surface of the above is designated as the foamable coating surface 4. In addition, 2 is the epidermis of the shoe and 3 is the heel.

FIG. 2 shows a part of the shoe sole 1 having a foamed coating surface 4, and the bottom surface of the shoe on the front end side is a mold rubber surface 5 which is not coated with the foaming coating material.

Reference Example As a reference, an example of manufacturing a conventional rubber sheet for shoe soles, which is printed on a rubber sheet, will be described. As described in Embodiment 1, pressure and heat are applied in a predetermined mold. The surface of an NR rectangular rubber sheet that has been vulcanized and molded by priming is subjected to a primer treatment with a roll coater, followed by a ground coat treatment with a flow coater and then a print treatment by offset printing to protect the printed surface. A coat layer is applied to form a rubber sheet having a printed pattern.

[0027]

【Example】

Examples 1 to 4 Using the materials shown in Table 1 below, rubber sheets for shoe soles having a leather-like surface layer were prepared under the processing conditions shown in Table 1 below.

In addition, coating of foamable paint, heat foaming treatment,
Buffing, pressing and printing were performed as follows.

(Painting of foamable coating material) A roll coater was used.

(Heat foaming treatment) Condition 1: High temperature foaming was performed at 180 ° C. for 5 minutes by heating in an oven.

Condition 2: 140 ° C., 5 by press heating
Heated at medium temperature for minutes.

(Buffing) Cloth buffing was performed.

(Pressing) Using a textured surface die, 10
Heating was performed at 0 ° C. for 1 minute.

(Print) Offset printing was performed.

[0035]

[Table 1]

Comparative Examples 1 and 2 For comparison, a rubber sheet for a sole for comparison was prepared in the same manner as in Example except that the materials and processing conditions shown in Table 1 were used.

The rubber sheets for shoe soles of Examples 1 to 4 and Comparative Examples 1 and 2 produced as described above were evaluated by a sensory test according to the custom in the art.
That is, 10 adult men and women conducted a sensory test of visual evaluation and tactile evaluation by touch, and the results are shown in Table 2 below.

[0038]

[Table 2]

As can be seen from Table 2 above, a rubber sheet for shoe soles, which is soft to the eye and soft to the touch, was obtained by the foamed coated surface of the example of the present invention.

On the other hand, even if the urethane beads were added and mixed, the evaluation of the sensory test was unsuitable for the non-foamed ones.

[0041]

EFFECTS OF THE INVENTION According to the inventions of the claims of the present application, it is possible to provide a rubber sheet for shoe soles, which has an appearance very similar to leather and is soft to the touch.

Further, there is an effect that it is possible to provide a rubber sheet that matches the design and material of the outer skin side, and in particular, a novel rubber sheet for soles suitable for use in women's shoes having various designs on the outer skin side.

Further, since the surface of the rubber sheet has soft irregularities on the surface, there is an effect that a rubber sheet for shoe sole having gripping property can be obtained.

Further, according to the inventions of claims 2 to 4, a part of the broken cell foam film remains in a raised state on the surface of the buff-polished rubber sheet, and a suede-like pattern and feel can be obtained. Is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a shoe in which a rubber sheet having a leather-like surface layer of the present invention is attached to the entire surface of a shoe sole.

FIG. 2 is a perspective view showing the appearance of a shoe in which a rubber sheet having a leather-like surface layer of the present invention is attached to a part of the shoe sole.

[Explanation of symbols]

1 ... shoe sole, 2 ... shoe skin, 3 ... heel, 4 ...
・ Foam coating surface, 5 ... type rubber surface.

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[Procedure amendment]

[Submission date] May 13, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

[0035]

[Table 1]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location C08K 9/10 C08K 9/10 C08L 75/04 NGE C08L 75/04 NGE C09D 5/00 PPH C09D 5 / 00 PPH 7/12 PSM 7/12 PSM

Claims (5)

[Claims] 1. A shoe sole having a leather-like surface layer having a film thickness of 15 to 1000 μm formed by heating and foaming a foamable paint layer formed by coating on a part or the whole surface of a rubber sheet for a shoe sole. Rubber sheet for. 2. The foamable paint layer according to claim 1, wherein the foamable paint layer formed by coating on a part or the whole surface of the rubber sheet for shoe sole is formed by applying a foamable paint in an amount of 5 to 100 g / m ² (dry weight). A rubber sheet for shoe soles, which is characterized by being present. 3. The rubber sheet for a shoe sole according to claim 1, wherein the leather-like surface layer is buffed after being foamed by heating. 4. The rubber sheet for a shoe sole according to claim 1, wherein the leather-like surface layer is buffed and pressed after heat foaming. 5. The foamable coating material according to claim 1, wherein the foamable coating material is 10 to 500 parts by weight of a foam capsule, and optionally 400 parts by weight of urethane beads to 100 parts by weight of a urethane resin binder. A rubber sheet for shoe soles, which is a mixture of: