JPH0152513B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing patterned suede leather, which maintains the clarity of the colored pattern even when subjected to surface friction, surface scratching, pulling, and other abrasive forces, and maintains a suede-like appearance.
The purpose of the present invention is to provide suede leather that does not deteriorate in feel. Various kinds of suede leather have been commercially available for a long time, and they are being used for a wide range of applications, including general accessories such as clothing, furniture, footwear, bags, and bags, as well as interior materials for automobiles and other vehicles. In recent years, with the diversification of living environments, there has been a strong demand for suede-like wall coverings as indoor wall coverings, in addition to the uneven wall coverings for Western rooms that have traditionally been the mainstream, and the development of this material is urgently needed. . However, conventional suede leather is produced by processing the surface of a microporous material such as vinyl chloride or polyurethane by grinding such as buffing or sanding, or peeling such as slicing, and then printing an arbitrary color pattern on the surface. or embossed. However, the surface of suede leather is porous and has minute irregularities, so even if colored patterns are printed on this surface using gravure printing, etc., the colored layer is superficial and lacks depth. , it is not possible to obtain a clear color pattern because it is mesh-like. In addition, since the colored layer is superficial, when abrasion forces such as friction, scratching, and tension are applied to the surface, it is inevitable that the colored pattern will partially deform or wear out. Scratches caused by the doctor knife may occur due to unexpected contaminants during printing.
There are disadvantages such as high product defect rate. Recently, in order to improve these drawbacks, methods such as screen printing and letterpress printing have been proposed in place of intaglio printing methods such as gravure. If you try to make the best use of it, you will inevitably have the disadvantages that the color pattern will be unclear and the scratch strength of the printed layer will be weak.On the other hand, if you make the color pattern clear and increase the scratch strength, The drawback is that the suede-like appearance and feel are inevitably diminished. In view of the above-mentioned current situation, the inventors of the present invention have conducted intensive research to create a suede that does not reduce the suede-like appearance and feel, and that does not cause deformation of the color pattern or wear even when the surface is subjected to abrasion force. I was able to get leather. That is, in the present invention, as a first step, a bulky printed layer with a desired color pattern is formed on a substrate using one or more foamable synthetic resin colored paints of different hues,
Next, as a second step, another foamable synthetic resin colored paint having a different hue is applied and filled into the gap where the bulky printing layer has been applied to form a coating layer of the matrix portion, and then as a third step, the above-mentioned The bulky printed layer in the first step and the coating layer in the second step are simultaneously heated and foamed to form a microporous body, and as a fourth step, the surface of the microporous body obtained in the third step is ground. This is a unique manufacturing method for patterned suede leather. FIGS. 1 to 4 show an example of patterned suede leather obtained in the order of the manufacturing process of the present invention. Next, the present invention will be explained with reference to illustrated examples. As a first step, a desired color pattern is applied onto the surface of the base material 1 using a gravure printing machine, a rotary screen printing machine, an American D&S type printing machine, etc. with a foamable synthetic resin colored paint to a thickness of 200 mm to 200 mm.
After forming a bulky printing layer 2 of 220 μm, it is dried and gelled. The base material 1 mentioned above is a sheet-like material such as paper, woven fabric, knitted fabric, non-woven fabric, or synthetic resin film or sheet. In addition, the foamable synthetic resin colored paint is prepared by blending plasticizers and stabilizers into polyvinyl chloride resin (PVC) in accordance with conventional methods, and further blending pigments to impart a desired color, as well as azodicarbonate resin. It is formulated with general-purpose foaming agents such as amide and azobisisobutylnitrile, but the synthetic resin used in the colored paint is not limited to PVC, and can include polyurethane and other various types used in foamable synthetic resin sheets. Synthetic resins can be used, and various general-purpose blowing agents can be used. Next, after forming the bulky printed layer 2 with the desired color and pattern as described above, as a second step, a color having a different hue from that of the foamable synthetic resin colored paint is applied to the gap A of the bulky printed layer 2. Another foamable synthetic resin colored paint is applied and filled to the same thickness as the bulky printing layer 2 using a knife coater, a roll coater, etc. to form the coating layer 3 of the matrix portion, and then dried and gelled. The foamable synthetic resin colored paint forming the coating layer 3 may be a synthetic resin different from that used in the bulky printed layer 2 with the colored pattern described above, but it is possible from the viewpoint of ease of compatibility between the two. Furthermore, it is preferable to use the same synthetic resin, the same proportion of the blowing agent, and only different hues. As described above, the bulky printing layer 2 with a colored pattern and the coating layer 3 serving as a matrix portion are coated on the surface of the base material 1, and after drying and gelling, the bulky printing layer 2 with the colored pattern is applied in a heating chamber as a third step. The microporous bodies 4 and 5 are formed by simultaneously heating and foaming the printing layer 2 and the coating layer 3, which is a matrix portion, at a foaming ratio of 5 to 6 times. After forming the microporous bodies 4 and 5 as described above, the product 6 is obtained by grinding with a sanding roll or a buffing machine as a fourth step. Of course, in the fourth step, in addition to a sanding roll, a buffing machine, etc., any method such as stripping with a slicer, sandblasting, etc. may be used, and these may be used in combination as appropriate. In the third step, the bulky printed layer 2 with the colored pattern and the coating layer 3 serving as the matrix portion are expanded in the thickness direction by heating and foaming to form the microporous material 5 into a matrix, and the microporous material 5 is formed into a matrix. Microporous material 4 with a colored pattern having two or more different hues
Suede leather is obtained as a product that is integrated into a mosaic shape, and the surface is scraped off in the fourth step to form fine irregularities on the surface and has a clear color pattern. is obtained. In addition, the color pattern of the suede leather obtained as described above has the same hue and pattern in the thickness direction of the suede leather up to the bottom of the matrix part, and therefore, the surface of the suede leather is not affected by friction, scratches, or tension. Even when abrasion force is applied, there is no partial deformation or wear of the colored pattern unlike in the conventional case. In addition, since the color is directly applied to the microporous material 4 with the colored pattern, there is no need to separately print the colored pattern on its surface, so it is possible to avoid defects caused by defects caused by contaminants in conventional printing ink. etc., and the desired clear color pattern can be maintained for a long period of time without impairing the appearance and feel of suede leather. FIG. 5 shows another embodiment of the present invention (in FIG. 5, the same reference numerals as in FIGS. 1 to 4 indicate the same members). The reinforcing layer 7 is laminated. The reinforcing layer 7
By laminating them, the suede leather according to the present invention can also be used for flooring materials that particularly require strength. Furthermore, the present invention provides the above-mentioned bulky printed layer 2 with a colored pattern.
The thickness of the product 6 may be changed, the foam may be formed with two or more different hues, the foaming ratio may be appropriately selected, or the surface of the obtained product 6 may be further printed, embossed, or flame-retardant in accordance with conventional methods. ,
This does not preclude post-processing such as water repellency or forming a rewetting or pressure-sensitive adhesive layer on the back surface. It goes without saying that the present invention can be applied not only to patterned suede leather, but also to general non-foamable and foamable synthetic resin sheets. As described above, the patterned suede leather obtained by the present invention has a color pattern of a desired hue formed within the matrix of the suede leather, so
Even if abrasive forces such as surface friction, scratching, or tension are applied, there is no partial deformation or abrasion of the colored pattern, so it can be used as an interior material for vehicles such as automobiles, or as an indoor wall covering material or flooring material. When used, it is possible to obtain high-class suede leather vehicle interior materials, wall covering materials, and flooring materials that do not undergo deformation or wear in color patterns or wear over a long period of time, and do not deteriorate in appearance or feel. In addition, the method of the present invention does not require a separate printing process on the surface of suede leather as in the conventional production of suede leather. Can be easily manufactured like suede leather,
There are great industrial benefits. Example 1 Foamable synthetic resin colored paint: (1) Colored paint for colored patterns PVC for paste (manufactured by Mitsubishi Monsanto Chemical Co., Ltd., trade name P-455) 100 parts by weight Plasticizer (DOP) 60 parts by weight (chlorinated Parafine) 8 parts by weight Stabilizer (manufactured by Adeka Argus, trade name: FL#
25) 3 parts by weight Foaming agent (manufactured by Otsuka Chemical Co., Ltd., trade name AZ-H)
5 parts by weight Filler (manufactured by Shiraishi Calcium Co., Ltd., trade name Whiten SB) 30 parts by weight Flame retardant (Sb ₂ O ₃ ) 5 parts by weight Colorant (TiO ₂ , white) 9 parts by weight 〃 (Begara, brown) 0.5 Part by weight 〃 (Carbon black, black) 0.1 part by weight (2) Colored paint for matrix PVC for paste (P-455) 100 parts by weight Plasticizer (DOP) 60 〃 〃 (Chlorinated paraffin) 8 〃 Stabilizer (FL# 25) 3 〃 Foaming agent (AZ-H) 5 〃 Filler (Whiten SB) 30 〃 Flame retardant (Sb ₂ O ₃ ) 5 〃 Coloring agent (TiO ₂ , white) 10 〃 Basis weight 80g/m on the base material Using paper No. ² , the colored paint for colored patterns (1) is printed in bulk to a thickness of 200 μm on the surface using a rotary screen, and then dried and gelled in a heating chamber. Next, in the gap of the bulky printing of the colored pattern,
The colored paint for the matrix (2) was applied and filled with a knife coater to a thickness of 200 μm, dried and gelled in the same manner as above, and then heated and foamed at 220°C in a heating chamber at a foaming ratio of 6 times to a thickness of 1.2 mm. After expanding the foam, the surface is ground using a sanding machine using #150 sandpaper.
Obtain suede leather with a thickness of 1 mm. The above-mentioned suede leather has a very clear beige color pattern in the white matrix,
Moreover, it has an excellent appearance and feel as suede leather. Example 2

【table】

[Table] (2) Colored paint for matrix PVC for paste (PX-QL) 100 parts by weight Plasticizer (DOP) 60 〃 〃 (Chlorinated paraffin) 8 〃 Stabilizer (KV80A-10) 2.5 〃 Foaming agent (AZ- H) 4 〃 Filler (Whiten SB) 30 〃 Flame retardant (Sb ₂ O ₃ ) 5 〃 Colorant (TiO ₂ , white) 9 parts by weight 〃 (Begara, brown) 0.5 〃 〃 (Carbon black, black) 0.1 〃 Using the same base material as in Example 1, the colored paint for the two colors A and B was printed on the surface using a rotary screen to a thickness of 220 μm, and then dried. After gelling, the above (2) matrix coloring paint is applied and filled with a knife coater, heated and foamed in a heating chamber at a foaming ratio of about 5 times to a thickness of 1.1 mm, and the surface is further coated with a slicer. Peel it off to obtain 1mm thick suede leather. The above-mentioned suede leather has a clear color pattern of two colors, white and ivory, in a beige matrix, and is beautiful without impairing the appearance and feel of suede leather in any way.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a state in which a colored pattern is printed, Figure 2 is a cross-sectional view of a state in which the gap between the colored patterns is filled and coated, and Figure 3 is a state in which the material in Figure 2 is heated and foamed. FIG. 4 is a cross-sectional view showing the surface of FIG. 3 after being sanded, and FIG. 5 is a cross-sectional view showing another embodiment of the suede leather of the present invention. 1: Base material, 2: Bulky printed layer with colored pattern, 3: Coating layer in matrix portion, 4: Microporous material with colored pattern, 5: Microporous material in matrix portion, 6: Suede leather, 7 : Reinforcement layer.

Claims (1)

[Claims] 1 In the first step, a bulky printed layer with a desired color pattern is formed on the substrate using one or more foamable synthetic resin colored paints of different hues, and then in the second step, the bulky printed layer is applied. After forming a coating layer of the matrix portion by applying and filling another foamable synthetic resin coloring paint with a different hue into the gap formed by the printing process, as a third step, the bulky printing layer in the first step and the second step are applied. A method for producing patterned suede leather, characterized by simultaneously heating and foaming the applied layer to form a microporous body, and further, as a fourth step, grinding the surface of the microporous body obtained in the third step. .