JPH0320116Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (industrial application field) This invention relates to synthetic resin leather, and is particularly applicable to automobile seats, inner layer materials for automobiles, fabrics for clothing, leather for furniture, etc. It is widely used for wall coverings and other interior decoration purposes.

(Prior art) Most of the synthetic resin leathers conventionally used for the above-mentioned purposes are woven or knitted fabrics made of natural fibers such as rayon, cotton, and hemp, and synthetic resin fibers such as polyester.
It is known that fibers of this type are laminated with polyvinyl chloride resin foam 2, but since this type of fiber lacks compatibility with vinyl chloride, it cannot be strongly laminated just by heat-sealing. This adhesion can be achieved by using fabrics coated with adhesive in advance before lamination, or by applying adhesive 3 to the surface of the foam layer (including the unfoamed layer) and laminating the fabrics in a wet state. In most cases, the two are bonded together using a binder (see Figure 3).

However, this known product requires an adhesive application step, and if the adhesive used is a solvent type, the working environment will be degraded by its volatile gas. Furthermore, it is dangerous due to the risk of ignition, and when a water-soluble adhesive is used, a special drying process is required, which significantly increases manufacturing costs. Particularly when such adhesives are used, they not only impair the feel of the product by penetrating into the fabric and fixing the weave, but also impair the feel of the product by filling the voids between the fibers. It loses its moisture permeability. As a result, dew condensation occurs in the wall layer material, and the drying of the glue used during processing is delayed. Furthermore, the product sometimes curls, making subsequent cutting and sewing difficult.

In addition, Utility Model Publication No. 57-13360 is known as a wall covering material made of vinyl chloride that has moisture permeability, but this prior art has one layer of paper on one side of the sackcloth.
4, and put synthetic resin in stripes from the other side,
Paper and synthetic resin are fused together to provide moisture permeability through the parts without synthetic resin, and because they are not entirely made of synthetic resin, they are inferior in strength and have significant design limitations (see Figure 4). Problems to be Solved by the Invention) This invention solves the drawbacks of the prior art by changing the structure and composition of the foam layer,
No undercoat adhesive is used, giving a rich texture and exterior color.
The purpose of the present invention is to obtain a sheet-like material laminate that can freely express a design such as an uneven pattern, is strong against moisture, has excellent resistance to rubbing on the fabric surface, and has moisture permeability.

B. Structure of the invention (means for solving the problem) In order to achieve the above-mentioned problem, this invention is a vinyl chloride composition containing the above three components, which is a vinyl chloride resin, a plasticizer, and an elastomer that is compatible with these. A coarse cloth-like material is pressed against a foam layer in a melted and softened state immediately after foaming, and some of the fiber threads of the cloth-like material sink into the foam layer and form on the front and back sides of the foam layer. A polyvinyl chloride resin foam sheet-like laminate is characterized in that the exposed portions are evenly distributed.

(Embodiment) Now, an embodiment of this invention including the invention described in the claims 1 to 5 of the utility model registration claims will be described.

Example 1 In FIG. 1, reference numeral 10 is a coarse cloth such as cheesecloth or cloth, and a foamed composition layer 11 made of vinyl chloride is adhered to the surface of this cloth without using an adhesive or the like. While it is heated and melted, the coarse cloth 10 is sunk into the foam layer,
After cooling, a product is formed, and a part of the threads or fibers of the coarse cloth 10 are exposed on both the front and back sides of the laminate, and the exposed portions 12 are formed on each of the front and back surfaces of the laminate. Average distribution 13
has an uneven pattern.

The composition and manufacturing method of the vinyl chloride composition of this invention will now be explained.

Example 1. Compounding components Parts by weight Vinyl chloride resin (average degree of polymerization 900) 50 parts Elastomer 60 parts Breakdown Vinyl chloride-vinyl acetate copolymer...50 parts NBR...10 parts C Plasticizer DOP 50 parts D Other Additives Calcium carbonate 30 parts Foaming agent: Azodicarbonamide 3 parts Stabilizer: Ba-Zn type 3 parts The above formulation was thoroughly mixed with a mixer, and the composition was molded into a film with a thickness of 0.22 mm. Next, the film was laminated onto backing paper (80 g/m ² on a rice scale) 14, and a predetermined pattern was printed on the film surface by gravure printing. Next, using a laminating machine, cheesecloth (warp 30 denier, number of threads 20/2.54cm, weft yarn hemp single yarn count 10, number of threads 20/2.54cm) is placed on the film surface, which is a type of coarse cloth 10. ) were placed in a stacked state and the two were pressed together at a temperature of 150 to 160° C. to laminate the film surface. Then in a foaming oven at a temperature of 200-210℃ for 60 seconds-90
Heat for seconds to foam, and immediately after exiting the foaming furnace,
While the foam layer is still in a molten and soft state, it is pressed between an embossing roller and a rubber roller on which a predetermined uneven pattern has been engraved to form an uneven pattern 13 on the surface of the foam layer 11 made of polymerized cheesecloth, and at the same time, the foam layer 11 and cheesecloth 1
0 and the backing paper 14 are integrated by pressure bonding. The pressure by this uneven roller was applied at a linear pressure of 1 ton. In this device manufactured in this manner, the thickness of the convex portions 15 of the uneven pattern is 0.60 to 0.80 mm, and the thickness of the concave portions 16 is 0.25 to 0.25 mm.
0.35mm, and in this recess, coarse cloth 10
Some of the threads or fibers are exposed on the uneven pattern side.

The bond between the foam layer 11 and the cloth 10 is not only a physical bond, but also a strong bond due to the adhesive force of the vinyl chloride composition. but,
Even in the melted and softened state, the composition has a higher viscosity than adhesives (emulsion, solvent type) and has a lower wettability, so it does not fill the voids in the fibers of the fabric, and the moisture permeability of the fibers is maintained.

In particular, since the composition contains an elastomer that is compatible with vinyl chloride resin and a plasticizer, these elastomers are bonded during heating to increase the adhesive strength after cooling, and are even more strongly bonded to fabrics. It's glued.

Embodiment 2 In FIG. 2, unlike the embodiment shown in FIG. 1, the surface of the coarse-grained cloth 10 is roughened, and the surface opposite to the cloth 10 has a lining paper 14 that is breathable and moisture permeable.
is attached. Other parts are the same as those in FIG.

An example of a vinyl chloride composition and a method for producing the same is as follows.

Example 2. Compounding components Parts by weight Vinyl chloride resin (average degree of polymerization 1100) 50 parts Elastomer 60 parts Breakdown Vinyl chloride-vinyl acetate copolymer...50 parts Chloroprene rubber...10 parts C Plasticizer DOP 50 parts D Other additives Calcium carbonate 30 parts Foaming agent: Azodicarbonamide 3 parts Stabilizer: Ba-Zn type 3 parts The above formulation was thoroughly mixed with a mixer to form a composition, and a film with a thickness of 0.50 mm was made using a calendar. This film is then laminated with non-fabric (68 warp and weft yarns/2.54cm each) at a film temperature of 150-160℃, and then heated in a foaming oven at a temperature of 200-220℃. Then, while the foam layer 11 taken out from the foaming furnace is still in a melted and soft state, a textured roller is applied to the back side of the fabric, a rubber roller is applied to the front side, and the fabric is heated for 80 to 120 seconds to foam. 10 and the foam layer 11 are pressed together, the cloth 10 is reduced into the foam layer 11, and a part of the threads or fibers of the cloth 10 are exposed on both the front and back of the foam layer.

Then, the product was brought into contact with a cooling drum and cooled down to room temperature one after another to obtain a product.

The foam laminate had a thickness of 1.0 mm at the protrusion 15.

C. Effect In this device constructed as described above, the cloth 10 and the foam layer 11 are adhesively laminated on the entire surface, and in particular, the cloth 10 is fitted into the foam layer 11 to physically connect them.
Combined with the adhesive strength of the elastomer, it has peel resistance that does not cause discoloration compared to conventional adhesive-based leather, and is also durable.

In addition, since no adhesive is used for the cloth, it has a rich texture.
In particular, since the fibers or threads of coarse cloth have exposed portions on both the front and back sides, moisture passes through the fibers or threads in this laminate or through gaps formed around the fibers. Alternatively, when these fibers are used as wall covering materials and bonded to the wall with an adhesive, moisture is vaporized through these fibers, drying quickly, and layer 1
Due to the heat insulating effect of No. 1, there is almost no condensation.

Furthermore, due to this excellent moisture permeability, even when used for chairs or clothes, the degree of skin irritation is far less than that of known glued laminates.

Also, because it is durable, it is suitable for places where heavy loads are repeatedly applied, such as car seats.

(Effects Unique to the Example) When the material of Example 1 was used as an actual wall covering material, the glue dried faster during construction than the leather using adhesive, and no knots occurred.

In addition, a moisture permeability test was conducted according to JISZ-0208, and the following results were obtained.

Conventional product 1 (without fabric) 120g/m ² /24 hours Conventional product 2 Foam layer formed after applying adhesive to fabric 350g/m ² /24 hours Invented product 1992g/m ² /24 hours Moisture permeability was almost the same as Example 1, and when the peel strength was tested, the following results were obtained.

Average peel strength (Kg/3cm) Conventional product (using adhesive) Vertical 2.5 Horizontal 2.2 Invented in this case Vertical 2.7 Horizontal 2.5

[Brief explanation of drawings]

The drawings relate to this invention, and FIG. 1 is an enlarged view showing Embodiment 1 of this invention, FIG. 2 is an enlarged sectional view of Embodiment 2, and FIG. 3 is an enlarged sectional view of a known example.
FIG. 4 is also an enlarged sectional view of another known example. Main symbols in the figure: 10... cloth, 11... foam layer, 12... exposed portion, 13... uneven pattern.

Claims (1)

[Claims for Utility Model Registration] 1. Foaming in a melted and softened state immediately after foaming a sheet-like material made of a vinyl chloride composition containing the above three components, which is a mixture of a vinyl chloride resin, a plasticizer, and an elastomer that is compatible with these. A coarse cloth-like material is pressed against the layer, and some of the fiber threads of the cloth-like material sink into the foam layer, so that the exposed parts on the front and back of the foam layer are distributed evenly. PVC resin foam sheet-like laminate. 2. The vinyl chloride resin according to claim 1, wherein the elastomer is made of at least one of NBR (acrylonitrile butadiene rubber), CR (chloroprene rubber), and chlorinated polyethylene. Foam sheet laminate. 3 As the elastomer, at least one of the NBR, CR, and chlorinated polyethylene;
The polyvinyl chloride resin foam sheet laminate according to claim 1, further comprising a copolymer of vinyl chloride and other monomers. 4. The polyvinyl chloride resin foam sheet laminate according to claim 1, wherein the foam layer has an uneven pattern on its surface. 5. The polyvinyl chloride resin foam sheet-like laminate according to claim 1, wherein the foam layer is provided with an uneven pattern together with the cloth on one side.