JPH0725136B2 - Method for manufacturing sheets with grain pattern - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a sheet having a textured pattern which is used as a table cloth, a table mat, a place mat, a kitchen mat, a desk mat, a shower curtain and the like.

[Prior Art and Problems to be Solved by the Invention] In recent years, table cloths, table mats, place mats, kitchen cloths, desk mats, shower curtains, etc. made of thermoplastic resin sheets such as polyvinyl chloride sheets have been widely used. As such sheets, there are also known sheets having a grain on one side for the purpose of preventing slippage and the like.

Conventionally, in order to provide a texture pattern on one side of this kind of sheet, a method of heating and softening a thermoplastic resin sheet such as a polyvinyl chloride sheet to pass it between a rubber roll and an embossing roll and pinching with both rolls is adopted. Has been done.

However, since the surface of the rubber roll is not a mirror surface and the surface of the thermoplastic resin sheet is softened by heating, if a grain pattern is applied by such a method, the surface of the sheet on the side in contact with the rubber roll becomes poor in smoothness and becomes transparent. There was a drawback that the property deteriorated.

As a method of solving these drawbacks, a method of conventionally supplying water to the rubber roll side to fill the fine irregularities on the rubber roll surface with water and performing a graining process so that the rubber roll surface becomes close to a mirror surface, the surface of butyl rubber etc. as a rubber roll A method of using a material made of rubber having a high smoothness has been proposed.

However, this method requires a facility to discharge the supplied water, and the heated and softened sheet is rapidly cooled by water, which reduces the texture of the grain and makes it easier to plate out, causing a change in the grain pattern. It has the drawback of being easy. In addition, in the method, although it is possible to obtain a material having higher transparency than using a normal rubber roll, it is difficult to say that it has sufficient transparency, and the sheet softened by heating adheres to the rubber roll and peels off (roll removal). Phenomenon), and the sheet surface is likely to be rough.

[Means for Solving the Problems]

As a result of intensive studies conducted by the present inventors in view of the above points, by providing an ultraviolet-crosslinking resin layer on the surface on which the embossed pattern is not formed, it is possible to perform embossing with a device including a normal rubber roll and an embossing roll. , It is possible to impart a texture pattern without lowering the transparency of the sheet, and the obtained sheets have stain resistance on the surface, and the texture pattern on the opposite side from the non-texture surface side. The inventors have completed the present invention by finding that they show a beautiful appearance that is transparent.

That is, the gist of the present invention is to heat and soften a laminate having an ultraviolet-crosslinking resin layer provided on one surface of a sheet base material made of a thermoplastic resin, and then the ultraviolet-crosslinking resin layer side is in contact with the rubber roll side,
The method for producing a sheet with a grain pattern is characterized in that the sheet is provided with a grain pattern by passing it between an embossing roll and a rubber roll so that the other surface side is in contact with the embossing roll, and pinching it by both rolls.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows sheets with a grain pattern obtained by the method of the present invention. In the figure, 1 is a sheet substrate, 2 is a UV-crosslinking resin layer, and 3 is a grain pattern.

The sheet substrate 1 is made of a thermoplastic resin, and examples of the thermoplastic resin include polyvinyl chloride, polystyrene, polyethylene, polypropylene, ethylene-vinyl acetate copolymer and the like. Although the thickness of the sheet base material 1 varies depending on the application, it is preferably about 0.1 to 5.0 mm. The ultraviolet cross-linking resin constituting the ultraviolet cross-linking resin layer 2 includes polyether acrylate type, epoxy acrylate type, urethane acrylate type, polyester acrylate type, thiol.
A diene reaction type or the like is used. The thickness of the ultraviolet-crosslinking resin layer 2 is preferably 1 to 50 μm, particularly preferably 5 to 20 μm.

FIG. 2 shows a method for producing patterned sheets of the present invention,
1a is a thermoplastic resin sheet, 1b is a thermoplastic resin sheet provided with an ultraviolet-crosslinking resin layer on one side, and the sheets 1a and 1b are laminated so that the ultraviolet-crosslinking resin layer is on the outside to form the sheet substrate 1. Is heated and softened by the heat drum 4 and the heater 5. The heat-softened sheet base material 1 is passed between both rolls 6 and 7 so that the ultraviolet-crosslinking resin layer side is in contact with the rubber roll 6 and the opposite side is in contact with the embossing roll 7, and is sandwiched between the rolls 6 and 7 to form the ultraviolet-crosslinking resin layer. A texture pattern is formed on the surface on the non-open side, and the sheets 1a and 1b are completely laminated and integrated. The textured sheet is cooled by the cooling roll 8. Incidentally, 9
Is a rolled product, and 10 is a surface winding roll.

In the above-mentioned embodiment, the case where the sheet base material 1 is formed by laminating 1a and 1b has been described, but it is also possible to use one laminated in advance or to use 1b alone. Further, not only the case where the ultraviolet-crosslinking resin layer is formed in advance is used, but the embossing process may be performed while the ultraviolet-crosslinking resin is applied and cured.

Next, the present invention will be described in more detail with reference to specific examples.

Example 1 A polyvinyl chloride sheet (thickness: 1.0 mm) and a polyvinyl chloride sheet (thickness: 1.0 mm) having a UV-crosslinking resin layer (thioldiene reaction type, thickness: 10 μ) formed on one side thereof are UV-crosslinked. The resin layers were overlapped and heated so that the resin layers were on the outside, and then the UV-crosslinked resin layer side was brought into contact with the rubber roll, and the rubber roll and the embossing roll were passed between a pair of rolls to give a grain pattern. Table 1 shows the workability in forming the texture pattern and the properties of the obtained sheet.

Comparative Example 1 A polyvinyl chloride sheet having a thickness of 2.0 mm was heated and softened in the same manner as in Example 1 and then passed through a pair of rolls similar to those in Example 1 to give a grain pattern. Table 1 shows the workability in forming the texture pattern and the properties of the obtained sheet.

Comparative Example 2 The same polyvinyl chloride sheet as in Comparative Example 1 was provided with a wrinkle pattern in the same manner as in Comparative Example 1 while supplying water at 2 per minute on the rubber roll side. Table 1 shows the workability in forming the texture pattern and the properties of the obtained sheet.

Evaluated as.

〔The invention's effect〕

As described above, the textured sheets obtained by the method of the present invention have a surface-smooth UV-crosslinking resin layer formed on the surface thereof, and thus have excellent surface stain resistance and stains are less likely to adhere, and a sheet substrate. Even if a soft polyvinyl chloride sheet or the like containing a plasticizer is used as the plasticizer, the plasticizer does not bleed out to the surface. No problems such as adhesion to the sheet occur.
Further, the sheets of the present invention have a surface-smooth ultraviolet cross-linking resin layer on one side, and since the grain pattern is formed on the other side, the transparency is excellent, and the transparency and grain pattern are in harmony, It shows a beautiful appearance in which the texture pattern on the opposite side is seen through from the surface on which the texture pattern is not formed. Further, the method of the present invention, when imparting a texture pattern by pressing the sheet with a rubber roll and an embossing roll, using a sheet provided with an ultraviolet cross-linking resin layer on one surface, and the rubber roll so that the ultraviolet cross-linking resin layer is in contact with the rubber roll. Since the method of pinching with the embossing roll is adopted, the smoothness of the surface on which the grain pattern is not formed does not deteriorate, it is excellent in transparency, and the beautiful textured sheet with transparency and texture pattern is harmonized. Has the effect that can be provided.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a vertical cross-sectional view of the textured sheets obtained by the method of the present invention, and FIG. 2 is a schematic diagram showing the method for producing the textured sheets of the present invention. is there. 1 ... Sheet base material, 2 ... UV cross-linking resin layer, 3 ... Texture pattern, 4 ... Heat drum, 5 ... Heater, 6 ... Rubber roll, 7 ... Embossing roll

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Claims (1)

[Claims] 1. A laminate in which an ultraviolet-crosslinking resin layer is provided on one surface of a sheet base material made of a thermoplastic resin to heat and soften it, and then the ultraviolet-crosslinking resin layer side contacts the rubber roll side and the other surface side contacts the embossing roll. As described above, a method for producing a sheet with a grain pattern, which comprises passing a space between an embossing roll and a rubber roll and pinching the both rolls to impart a grain pattern.