JPH0611423B2 - Method for manufacturing decorative sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a synthetic resin sheet used as a so-called decoration material such as interior materials for automobiles, interior materials for various buildings, furniture pasting materials, and materials for bags. The present invention relates to a method for producing a decorative sheet by printing a pattern by pressure bonding (pressing).

<Prior Art and Problems> Conventionally, the printing of a synthetic resin sheet has a smooth synthetic resin sheet between a printing roll (gravure roll) obtained by engraving the surface of a metal roll and a backup roll (rubber roll or metal roll). The so-called gravure printing method, in which the printing ink applied to the engraved concave portion of the printing roll is transferred and printed on the surface of the synthetic resin sheet, is mainly used. In the case of a synthetic resin sheet having a squeezing pattern, it has been performed by a method such as a head stain method or a wiping (valley stain) method.

However, all of these prints are limited to the provision of a single print pattern. That is, in the case of the gravure printing method using the gravure printing roll, only the engraved pattern printed on the gravure printing roll is printed, and the head stain method and the wiping (valley stain) method are applied in advance. The printing effect was limited by the shaped squeezing pattern, and it was impossible to apply the double printing effect.

<Means for Solving the Problem> The present invention has been made in view of the above circumstances, and the means is to use a synthetic resin sheet having an uneven pattern as a backup sheet, and the uneven surface has the back surface of the sheet to be decorated. It is superposed and supplied between the printing roll and the backup roll, or an uneven pattern is formed on the backup roll, and the uneven surface is brought into contact with the back surface of the sheet to be decorated so as to contact the printing roll and the backup roll. A sheet is supplied and printing is performed on the surface of the sheet to be decorated with the printing roll while pressing the backup sheet and the sheet to be decorated or the decorative sheet between both rolls.

<Operation> According to the present invention, the surface of the sheet to be decorated, which is pressed by the convex portion of the backup sheet or the concave portion of the backup roll by the above means, becomes an indentation, and the printing ink is not transferred or is very small even if transferred. The printing ink is transferred in a shade on the surface of the sheet pressed by the portions other than the convex portions according to the degree of pressure bonding.

<Example> An example of the present invention will be described with reference to the drawings. The sheet (A) to be decorated is a soft vinyl chloride resin, an ethylene-vinyl acetate copolymer, polyethylene, a vinyl chloride-ethylene copolymer, or the like. A soft synthetic resin known in this technical field, such as a copolymer resin with the above component, or a vinyl chloride resin mixed with a rubber component such as NBR or another resin component having an affinity with the resin. Is formed into a sheet by any means such as a calendar method, an extrusion method, or a doctor blade method.If necessary, a woven cloth such as linen or vinylon woven cloth or a nonwoven cloth such as polyester is A backing material such as a blanket or paper may be used, and the sheet is not limited to non-foaming and may be a foamed sheet, or may be non-foaming and foaming. It is also possible to use a laminated sheet of, leather-like squeezing on the surface of such a colored or colorless synthetic resin sheet,
A lattice pattern, a geometric pattern pattern, a gauze pattern pattern, a woven pattern pattern, or a pattern with an arbitrary pattern (1), or a monochromatic or multicolor printed pattern with a smooth surface, or the printed pattern. And each of the above-mentioned squeezing patterns are applied, and the surface of the sheet (A) to be decorated, that is, the squeezing pattern (1) or the smooth surface is further provided with a light and shade pattern (2) (3) (4). A sheet (A) to be decorated together with a backup sheet (B) for printing is supplied between a printing roll (C) as a printing device and a backup roll (D), and between the rolls (C) and (D). The sheet (A) is subjected to solid printing while applying a pressing force with. In this case, the printing ink does not adhere to the convex portion (5) of the backup sheet (B) or the convex portion (6) of the backup roll (D), and a small amount of the printing ink does not adhere to the convex portion (the convex portion (5)). 5)
The pattern of (6) remains as the ground color of the sheet (A) to be decorated (2) or becomes a state in which a very thin printing ink is adhered, and it becomes the concave portion (5 ′) of the backup sheet (B) or the backup roll (D). Printing ink is printed in dark (3) and light (4) shapes on the portion corresponding to the concave portion (6 ') according to the degree of pressure pressed by the roll.

The backup sheet (B) is formed into a sheet using a soft synthetic resin similar to the sheet (A) to be decorated, or a hard or semi-hard synthetic resin, and an arbitrary uneven pattern (5) is formed on the surface thereof. (5 ') is engraved, and this sheet (B) may be foamed, non-foamed or a laminated sheet of foamed and non-foamed, or lined with a backing material. Concavo-convex pattern of (B) (5)
The sheet (A) to be decorated is superposed on the surface (5 ′) and supplied to the printing apparatus.

The printing device comprises a printing roll (gravure roll) (C) and a backup roll (D), which are well known in the technical field of this type, and a backup roll (when using the above-mentioned backup sheet (B)). D) is an ordinary smooth surface, but when the sheet (B) is not used, the backup roll (D) is engraved with an arbitrary uneven pattern (6) (6 ′) or an uneven sheet. It is made up of two rolls (C) and (D)
Solid sheet printing is performed on the surface of the sheet (A) while supplying and pressing the sheet (A) to be decorated or only the sheet (A) to be decorated on the backup sheet (B). In this case, the printing roll (C) is, as is well known, a solid printing roll called a metal normal mesh roll or a hard rubber roll for drawing up, and the backup roll (D) corresponds to the printing roll (C). When using a backup roll (D) engraved as a rubber or metal roll, a normal embossing roll or a roll obtained by engraving a rubber roll is actually used.

The printing ink (8) is located in the ink tray (9) and is transferred to the surface of the sheet (A) to be decorated by adjusting the scraping application amount with the printing roll (C) and the doctor blade (10). Yes, when printing is performed by applying a slight pressing force between the printing roll (C) and the backup roll (D), the convex portion (5) of the backup sheet (B) or the convex portion (6) of the backup roll (D) corresponds. Due to the impression, the ink is not transferred to the portion or is applied only very slightly, and the convex pattern becomes the pattern (3) in which the background color of the sheet (A) remains as it is, the backup sheet (B) or the backup roll. The portions corresponding to the recesses (5 ′) and (6 ′) in (D) are transferred in the shades (3) and (4) depending on the degree of pressing force. The light and shade are transferred to the sheet (B) or the roll (D) in a portion close to the convex portions (5) and (6) from the indentation portion and the printing ink adheres to the dark portion (3), and the convex portion (5) is transferred.
(6) The larger the area of the recessed portion, that is, the larger the center of the recessed portion, the lighter (4) the transfer sheet is pressed by the backup sheet and the backup roll, and the pattern corresponding to the uneven pattern of the backup sheet or the backup roll has a slightly unclear contour. It becomes a shaded pattern.

The uneven pattern (5), (5 '), (6), (6') of the backup sheet (B) or the backup roll (D) is a leather pattern, a lattice pattern, or a geometric pattern similar to the diaphragm pattern of the sheet (A) to be decorated. Although it is an arbitrary pattern such as a pattern, a relatively large pattern is preferable to the tie pattern, and it is desirable to be a different pattern from the tie pattern in order to further enhance the decorative effect.

Next, examples of specific embodiments will be shown.

Example 1 Using a calender, roll to a 0.4 mm sheet, line a 0.2 mm plain woven cloth, and obtain a soft brown soft vinyl chloride sheet that has a basket (not printed) on the surface.

A diamond-shaped geometric pattern concavo-convex diaphragm pattern was formed on the surface rolled into a 0.6 mm sheet by a calendar.

(3) Printing The plain woven fabric surface of the sheet (A) to be decorated is brought into contact with the diamond-shaped irregular surface of the backup sheet (B) and overlapped with each other, and a metal mesh roll (C) of 80 mesh and a flat backup rubber roll (D) ) And a dark brown ink is applied at a printing speed of 5 m / min to the basket diaphragm surface by solid coating and transfer, and then the backup sheet (B) and the printing sheet (A) are separated and dried. A decorative sheet having a diamond-shaped light brown geometric pattern and a basket pattern of dark brown around the diamond-shaped geometric pattern and light brown inside the diamond was obtained. In this case, the printed pattern on the surface was a blurred pattern at the boundary between the background color portion and the light and shade portion, and a decorative sheet having a unique decorative effect which could not be obtained by conventional printing was obtained.

Example 2 (1) Structure of the sheet (A) to be decorated A calcining method was used to prepare a foamable composition obtained by adding 6 parts by weight of azodicarbonamide to the formulation of the sheet to be decorated in Example 1.
A 0.45 mm sheet was rolled and lined with a backing material in the same manner as in Example 1, placed in a foaming furnace at 210 ° C. and heated for 1 minute to obtain 1 mm of colorless foam leather.

(2) Configuration of Backup Sheet (B) The backup sheet having the same configuration as that of the backup sheet of Example 1 was used, except that the surface was a concave-convex pattern in which semicircular convex and convex patterns were regularly oriented vertically and horizontally.

(3) Printing The back surface of the foamed leather is brought into contact with and superposed on the uneven surface of the backup sheet (B) and supplied to the printing apparatus of Example 1,
After blue ink was solidly applied and transferred on the surface of the foamed sheet, both sheets were separated and dried, and an extremely slight amount of blue ink was attached to the corners of the semicircular convex portion due to the impression. However, most of the indentation is white close to the ground color and becomes dark blue along the outer edge of the semi-circle, and the outer part, that is, the recess of the backup sheet and the inner part of the semi-circle, that is, the convex ridge, are both pale blue, The ground color portion and the contours of dark blue and light blue were a blur-like pattern with a very high decorative effect.

Example 3 (1) Structure of the sheet (A) to be decorated In place of the plain woven cloth of the sheet to be decorated of Example 1, a double-sided brushed cloth of plain woven cloth is lined, and the surface of the surface is printed with a snake skin stopper. To obtain a light brown soft sheet subjected to.

(2) Printing The mesh roll in the printing apparatus of Example 1 should be a flat rubber roll, the backup roll should be an engraving roll with a metal crocodile skin pattern, and the backup roll with the uneven pattern should be decorated so that the raised fabric surface abuts. The sheet is fed in, and the brown ink is solidly applied and transferred onto the snake skin diaphragm surface, and the part where the head stains and the convex part of the roll does not contact is dark, and the other parts are dark depending on the degree of pressing force on the snake skin diaphragm surface. The light and shade pattern of the crocodile skin was stained and a very unique decorative sheet double printed on the snake skin pattern was obtained.

<Effect> In the present invention, a synthetic resin sheet having an uneven pattern is used as a backup sheet, and the uneven surface is overlapped with the back surface of the sheet to be decorated and supplied between the printing roll and the backup roll. By printing on the surface of the sheet to be decorated with the printing roll while pressing the both sheets, the printing ink is not transferred or only a slight amount is attached to the portion imprinted by the convex portion of the backup sheet. The background color of the sheet to be decorated becomes the printing part, and the same pattern as the uneven pattern of the backup sheet remains as it is as if it touched from the surface, and the other parts are printed in dark and light depending on the degree of pressure bonding. Is transferred, and the shades are blurred, so it is possible to give a different pattern to the first pattern of the sheet to be decorated, especially It is possible to add arbitrary patterns compared to conventional expressions by printing on pressed sheets with squeezing patterns and double printing with head stains (or valley stains). The effect of decoration can be greatly increased by. Further, such a method can use the conventional printing apparatus as it is, and the backup sheet can be easily prepared by the conventional method, so that the economical burden is small. Further, the backup roll is provided with an uneven pattern, and the sheet to be decorated is supplied between the printing roll and the backup roll so that the uneven surface is in contact with the back surface of the sheet to be decorated, and the printing roll is pressed while pressing between both rolls. By printing on the surface of the sheet, the convex portion of the backup roll will express the same decorative pattern as when the previous backup sheet was used, and by replacing the conventional backup roll with an engraving roll, It is possible to provide a sheet having a novel pattern that cannot be seen before.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a perspective view of a manufactured state, FIG. 2 is a plan view of a part of a manufactured sheet, FIG. 3 is a sectional view thereof, and FIG. 4 is before printing. FIG. 5 is a plan view of a sheet to be decorated, FIG. 5 is a perspective view of a sheet having another printed pattern, FIG. 6 is a perspective view of the backup sheet, FIG. 7 is a sectional view in a printed state, and FIG. It is sectional drawing of other printing states, (A) is a sheet to decorate, (B) is a figure.
Is a backup sheet, (C) is a printing roll, (D) is a backup roll (5), (5 ') is an uneven pattern of the backup sheet, and (6) (6') is an uneven pattern of the backup roll.

Claims (2)

[Claims] 1. A synthetic resin sheet having an uneven pattern is used as a backup sheet, and the uneven surface is overlapped with the back surface of the sheet to be decorated and supplied between a printing roll and a backup roll. A method for producing a decorative sheet, comprising printing on the surface of the sheet to be decorated with a printing roll while pressing the both sheets. 2. A backup roll having an uneven pattern,
The uneven surface is brought into contact with the back surface of the sheet to be decorated so that the sheet to be decorated is supplied between the printing roll and the backup roll, and the printing roll is pressed while pressing the sheet to be decorated between both rolls. The method for producing a decorative sheet, wherein the surface of the sheet is printed.