JPS63178045A - Thermal fused article of base material and vulcanized rubber sheet and thermal fusing method thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for thermally fusing a base material and a vulcanized rubber sheet. In the following, a case will be described in which the method of the present invention is mainly used for manufacturing shoes, but the present invention is not limited thereto.

Conventional technology and its problems In recent years, as the demand for high value-added shoes has increased, the requirements for the design of shoe covers have also become more sophisticated, and in addition to conventional lines, stitches, two-tone colors, etc. It has become extremely necessary to attach design pieces with colorful designs to shoe covers. For this purpose, various characters, figures, etc. are printed in multiple colors on thermoplastic resin materials such as PVC leather and PVC sheets, and then the outlines are embossed and a sponge core material is stuffed inside. Efforts have been made to create a feeling. However, since the above-mentioned materials are thermoplastic, it is difficult to perform precise three-dimensional molding using current resin molding methods, and the three-dimensional effect of the resulting design piece is not satisfactory, and moreover, it lacks a luxurious appearance. Poor.

In order to solve the above problems, attempts have been made to use vulcanized rubber sheets instead of thermoplastic resin materials. Vulcanized rubber has many advantages, such as a) precise three-dimensional patterns can be formed extremely easily by conventional press molding, b) it exhibits a soft texture unique to rubber, and c) it is inexpensive. Because of this, it is useful as a design piece for a priest. However, the conventional method of adhering a design piece of a vulcanized rubber sheet to a completely different material such as cloth, vinyl chloride, synthetic leather, leather, etc. has the following problems and is not preferred.

1) When bonding with adhesive, the adhesive must be applied to both the design piece and the pastoral material, which greatly reduces work efficiency. Moreover, the adhesive protrudes, reducing the three-dimensional effect of the design piece. Moreover, the adhesive strength is not sufficient, and it has not reached the point where it fully satisfies the qualities specific to shoes such as robustness.

2) When sewing with a sewing machine, automatic VJ sewing using a computer sewing machine, which aims to save labor, cannot be applied to design pieces with complex outlines, and hand sewing significantly reduces work efficiency.

3) Fusion by high frequency is almost impossible with a dissimilar combination of vulcanized rubber and pad material.

Means for Solving the Same Point As a result of extensive research in view of the problems of the prior art described above, the inventors of the present invention have discovered that after treating the surface of a vulcanized rubber sheet with a specific primer, a specific adhesive is applied to the surface of the vulcanized rubber sheet. By applying the agent and drying it to form a hot melt layer, and then heat-sealing this to a base material such as cloth, vinyl chloride, synthetic leather, or leather, the vulcanized rubber sheet and the base material are bonded extremely strongly. They discovered this and completed the present invention.

That is, the present invention provides synthetic leather, natural leather, and natural II fibers through a reaction layer of a primer containing at least one selected from cyanuric acid derivatives and triazine derivatives and a thermoplastic one-component polyurethane elastomer adhesive. A heat-fused product of a base material and a vulcanized rubber sheet, characterized in that the base material selected from cloth, recycled fiber cloth, and synthetic fiber cloth is heat-fused to the vulcanized rubber sheet;
and ■ When heat-sealing a vulcanized rubber sheet to a base material selected from synthetic leather, natural leather, natural fiber cloth, recycled fiber cloth, and synthetic fiber cloth, the vulcanized rubber sheet is heat-fused to the base material. After treating the surface with a primer containing at least one selected from cyanuric m derivatives and triazine derivatives,
The present invention relates to a method for heat-sealing a vulcanized rubber sheet to a base material, characterized in that a thermoplastic one-component polyurethane elastomer adhesive is applied to the surface, dried, and heat-sealed to the base material.

In the present invention, any material conventionally used as pastor's covering material can be used as the base material, and specific examples thereof include synthetic leather, natural leather, natural l1tdi cloth, recycled II fiber fabric, and synthetic m rag cloth. Can be done.

Examples of synthetic leather include polyurethane leather, PVC leather using polyvinyl chloride, etc.; examples of natural leather include cowhide, pigskin, etc.; examples of natural fiber cloth include vegetable fiber cloth such as cotton and linen; Animal mH cloths such as silk and wool can be used as recycled fiber cloths such as viscose, rayon, etc.
Cellulose-based recycled fiber cloth such as cupro, rayon, acetate, etc., as well as synthetic fiber cloth such as polyamide-based, polyester-based, polyurethane-based condensation type, vinylidene, vinylon, acrylic, Teviron (polyvinyl chloride-based ) etc., which are made of addition-polymerized synthetic resins, etc. can be mentioned. In the present invention, if necessary, these fibers may be coated with an adhesive made of polyurethane resin, for example, to improve the adhesive strength with the vulcanized rubber sheet.

In the present invention, the rubber used for the vulcanized rubber sheet is
Any ordinary general-purpose rubber can be used, such as natural rubber, S
Examples include synthetic rubbers such as BR and IR. Any conventional method can be used to form a vulcanized sheet from these rubbers.

In the present invention, if necessary, a three-dimensional design of an uneven pattern, a two-dimensional design, etc. may be applied to one side of the vulcanized rubber sheet by a conventional method such as press molding. Further, simultaneous vulcanization printing of various colors and designs may be performed by a conventional method such as press vulcanization.

In the present invention, one or more selected from cyanuric acid derivatives and triazine derivatives are used as the main components of the primer (hereinafter these compounds are referred to as primer compounds). Examples of cyanuric RFA derivatives include cyanuric chloride, trichloroisocyanuric acid, and cyanuric acid. In addition, as triazine derivatives,
For example, zirene, simazine, trietadine, atrazine,
Examples include propazine. In the present invention, the above primer compound is used after being dissolved in one or more suitable solvents for at least 2 seconds. Examples of the solvent include methyl ethyl ketone, acetone, ethyl acetate, and toluene. The amount of the primer compound to be blended is not particularly limited and may be selected as appropriate, but it is usually about 3.0 to 10 CII% of the total m of the primer. Further, when treating a vulcanized rubber sheet with a primer, the amount of primer is not particularly limited and may be selected as appropriate.

In the present invention, any known thermoplastic one-component polyurethane elastomer having a melting point of about 80 to 160°C can be used as the main component of the thermoplastic one-component polyurethane elastomer adhesive. Specific examples include polyether,
Examples include polyurethane resins manufactured from polyisocyanates blocked with polyols, polyester polyols, etc., and resins in which acrylic esters are polymerized with the polyurethane resins. In the present invention, the elastomer is also used after being dissolved in one or more suitable solvents in the same manner as the primer compound described above. As a solvent,
The same primers as mentioned above can be mentioned. The blending amount of the elastomer is not particularly limited and may be selected as appropriate, but it is usually 15 to 4 of the total 8 parts of the elastomer adhesive.
It may be about 0%. The amount of the elastomer adhesive applied to the vulcanized rubber sheet is not particularly limited and may be selected as appropriate.

In the present invention, the strong thermal bonding between the vulcanized rubber sheet and the dissimilar base material is not only due to the heat welding of the thermoplastic one-component polyurethane elastomer, but also due to the cyanuric groups in the primer on the vulcanized rubber surface. This is thought to be due to the reaction between the elastomer adhesive and the urethane polymer group in the elastomer adhesive, and the softening or melting of the fibers, resin, etc. on the surface of the base material.

In the present invention, the vulcanized rubber sheet and the base material may be bonded together in the following manner, for example. First, the surface of the vulcanized rubber sheet to be heat-sealed to the base material is treated with a primer. The treatment method is not particularly limited, and may be any conventional method such as dipping or coating. Next, a thermoplastic one-component polyurethane elastomer adhesive is applied to the primer-treated surface by a conventional coating method such as brush coating or roll coating, and is dried to form a hot melt layer. The hot melt layer of the vulcanized rubber sheet and the base material are heated under pressure at about 120 to 170° C. and 1.0 to 5.0 kg/ci. As the heat fusing device, any conventionally known device can be used, such as a hot plate press machine, a hot roll press machine, a high frequency fusing machine, and the like. In the present invention, if necessary, a three-dimensional design or a two-dimensional design may be applied to one side of the vulcanized rubber sheet as described above, and the sheet may be used as a sieving material for pastor's covering material. At that time, we used a vulcanized rubber sheet with a design on it.
It may be made into the desired size and shape before being bonded to the pastor covering material.
Alternatively, after adhesion, it may be cut into desired dimensions to make shoes.

Effects of the Invention The heat-fused product of the present invention includes vulcanized rubber sheets, synthetic leather, natural leather, natural 8M cloth, and recycled! ! It is extremely strongly fused with fiber cloth. Furthermore, when the method of the present invention is applied, for example, to the manufacture of shoes, 1) a vulcanized rubber sheet with a three-dimensional design can be extremely firmly adhered to the jacket, thereby producing a high-value-added product with a luxurious feel; 2) Since the bonding work is simple, the work efficiency can be significantly improved.

EXAMPLES Examples and comparative examples are given below to make the present invention even clearer.

Example 1 The following primers and polyurethane elastomer adhesives were used.

■Primer cyanuric chloride 5 parts by weight Methyl ethyl ketone 45 Ethyl acetate
50 〃■Polyurethane elastomer adhesive Tan elastomer methyl ethyl ketone 40 〃Ethyl acetate
20 〃Toluene
20 As the thermoplastic polyurethane elastomer, Bandex T-5205 (manufactured by Dainippon Ink ■) was used.

The back side of a rubber sheet (concavity thickness: 11+lI, protrusion thickness: 2 m), which has been vulcanized into an uneven pattern according to a conventional method, is treated with the primer (■), and then the adhesive (■) is applied with a brush and dried. I let it happen. The amount of adhesive applied is 1 in terms of solid content.
It was about 00 to 200 g/butt.

This and soft synthetic leather [trade name Cordley, Yujin Cordley (
Co., Ltd.) were heat-sealed using a hot plate press machine at a hot plate temperature of 150°C, a pressure of 2 K9/ci, and a pressure bonding time of 2 seconds. When the adhesive strength between the above rubber sheet and synthetic leather was measured in accordance with JISK-6301, the normal adhesive strength was 3.0 and 9/as.
, 'FA Water Wet Adhesive Strength 2 BA 5 (The bonded product of the rolled rubber sheet and synthetic leather was cut with a die and used as a shoe cover to manufacture shoes.

The resulting shoes had a luxurious feel due to the soft feel of the rubber and the three-dimensional effect of the rubber sheet, and had good flexibility. In addition, the adhesive strength between the rubber sheet and the synthetic leather was sufficient, and the shoes had excellent quality such as durability.

Comparative Example 1 Using the same rubber sheet, synthetic leather, and adhesive as in Example, the rubber sheet and synthetic leather were bonded together in the following manner according to the conventional method.

1. Application of the adhesive to the rubber sheet and drying were performed in the same manner as in Examples.

2. Applying adhesive to the synthetic leather surface and drying a) Creating a jig for drawing a wire Cut a semi-rigid transparent vinyl chloride sheet with a thickness of 0.5NR to a size slightly larger than the shape of the rubber sheet in 1 above to make a window opening shape. A wire drawing jig was created.

1) Application and drying of adhesive Apply the line drawing jig in ① to the surface of the synthetic leather, draw the application outline with a pencil in advance along the window, and apply the adhesive in ① above, being careful not to extend beyond the outline. The agent was applied with a brush. The coating amount was approximately 100 to 200 g/7rt in terms of solid content, and the coating was dried for approximately 10 minutes.

3. Measurement of Adhesion and Adhesive Strength The rubber sheet from 1 above was attached to the adhesive-applied surface of the synthetic leather from 2.0) with great care so as not to shift.
1 Pressed with a K9 roll, then left for one day and night, and then measured the adhesive strength in the same manner as in the example, and found that the normal adhesive strength was 2.
．． The water resistance adhesive strength was 2.0 to 9/an.

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Claims (2)

[Claims] (1) Through a reaction layer of a primer containing at least one selected from cyanuric acid derivatives and triazine derivatives and a thermoplastic one-component polyurethane elastomer adhesive, synthetic leather, natural leather, natural fiber cloth, and recycled fibers are produced. A heat-fused product of a base material and a vulcanized rubber sheet, characterized in that the base material selected from cloth or synthetic fiber cloth is heat-fused to the vulcanized rubber sheet. (2) A vulcanized rubber sheet that is heat-fused to a base material when heat-sealing the vulcanized rubber sheet to a base material selected from synthetic leather, natural leather, natural fiber cloth, recycled fiber cloth, and synthetic fiber cloth. After treating the surface with a primer containing at least one selected from cyanuric acid derivatives and triazine derivatives, a thermoplastic one-component polyurethane elastomer adhesive is applied to the surface, dried, and heat-fused with the base material. A method for heat-sealing a base material and a vulcanized rubber sheet, the method comprising the steps of: