EA023844B1 - Printing material and method for production thereof - Google Patents

Abstract

The invention is related to polygraphy, in particular, it is used for decoration of binding cases, book jackets, labels and packages, and in production of job printing products where operations of blind relief stamping are used. The objects of the present invention are expansion of the printing toolbox, provision of a simple and efficient method of production of printing material and an innovational printing material with altered reflective power (dispersion of the index of reflection - imparting a "diamond" shine). The method of production of the printing material in the form of fabric of flexible sheet material comprises relief stamping of the main side of the web of flexible sheet material, the named main side being metallised. Relief stamping of the flexible sheet material is performed using a die and a counter die at a temperature of 1-150°C and a force of 0.01 to 50 t till microcracks are formed at point elements of the raised impression. Disclosed also is printing material comprising a fabric of flexible sheet material with embossing applied to at least part of its metallised main side by the hot stamping method, the metallised layer on point elements of the raised impression having microcracks.

Description

The invention relates to the printing industry, in particular, it is used for decorating book covers, covers, labels and packaging, as well as in the production of display products, where the operations of colorless relief stamping are used. Such a finishing operation gives printed products great attractiveness and improves its appearance.

A known method of manufacturing a printed material [1], selected as the closest to the claimed method. The known method includes the operation of printing an embossed coating on at least one portion of the surface of the main side of the sheet web of sheet material; embossing an embossed coating printed on said main side with a device that changes optical properties; and metallizing at least one portion of said surface of said major side with a metal coating. This method is quite complicated and to create products with altered optical properties requires additional operations performed using special equipment.

Printed articles made with relief stamping are widely known, see, for example, [2], [3]. From the point of view of relief stamping performed on them, these products are quite monotonous and do not have special optical properties.

Closest to the claimed printed material is printed material [1], which is a sheet of flexible sheet material coated with at least a portion of the metallized main side stamping. This product is laborious and difficult to manufacture.

The objectives of the present invention are the expansion of the arsenal of technical means, the creation of a simple and effective method for the manufacture of printed material and a new printed material with a modified reflectivity (dispersion of the reflection index - giving a diamond shine).

The problem in the method of manufacturing a printed material, which is a sheet of flexible sheet material, which includes stamping the main side of the sheet of flexible sheet material, and the specified main side is metallized, solved due to the fact that the stamping of the flexible sheet material is carried out by means of a stamp and counter-stamp at a temperature of 1-150 ° C and a force of from 0.01 to 50 tons until the formation of microcracks on the point elements of relief heating.

The inventive method preferably uses a stamp with a deep pattern located on the main side of the material, and a convex counter-stamp located on the other side of the material.

The embossing operation is performed as embossing without foil on metallized self-adhesive paper.

The problem in the printed material, which is a sheet of flexible sheet material with at least a portion of its metallized main side stamping, is solved due to the fact that the metallized layer on the relief hot-spot elements is made with microcracks.

The hot-spotting elements can be made in any form, preferably in the form of hemispheres, or truncated cylinders, or cones.

The hot-spotting elements can be made with maximum transverse dimensions of 0.1-1.0 mm, a height of 0.01-1.0 mm at a distance from the center to the center of 0.1-1.0 mm.

The flexible sheet material is preferably a metallized, self-adhesive paper with a substrate thickness of 5 to 150 microns.

The drawings show non-limiting examples of the implementation of the present invention.

In FIG. 1 schematically shows a device for implementing the inventive method; in FIG. 2 shows a plot of printed stamping material of the present invention at a scale of 1:10, FIG. 3 schematically shows a relief stamping element of the present invention at a scale of 1:30.

A device for bezelless stamping (see Fig. 1) consists of a stamp 1 with a working surface 2 with a deep pattern and a counter stamp 3 with a convex working surface 4, located opposite the working surface of the stamp 2. This device can be implemented in any of the available on the market cars. The stamp is installed on the punch of the press 5, and the counter-stamp 3 on the table of the press 6.

In this example, foil-free stamping is carried out on metallized self-adhesive paper on a ΝοΜοίΙ 5500 England machine.

As a rule, the operation of applying the paint layer on the surface of the main side of the web of the specified sheet material is performed before the embossing operation, in those areas where embossing should not be carried out. However, it is possible to apply a paint layer on the surface of the main side of the web of said sheet material and after the relief stamping operation.

The claimed method is implemented as follows.

The material 7 to be processed is placed on the working surface 4 of the counter-stamp 3. After that, 1 023844 is stamped stamping the material 7 with a stamp 1 with a relief image 2 by drawing the stamp and the counter-stamp together and applying force (arrow P in Fig. 1).

When carrying out this technological operation, the equipment, depending on the type of machine and the material being processed, develops a force (P) from 0.01 to 50 tons, in this particular example about 30 tons.

The temperature of the heating station during the operation can be selected from 1 to 150 ° C, depending on the type of machine and the material being processed. In this particular example, embossing is carried out at temperatures from 70 to 100 ° C.

The pressure strength of the press during stamping should be approximately twice as high as the pressure required for blind embossing, and approximately four times greater than that required for foil stamping. The temperature of the stamp should be the maximum allowable for the material used and the stamping speed. This allows, to the extent possible, to minimize equipment wear and at the same time to prevent deterioration in the quality of embossing and adhesion of the material to the stamp.

In this case, the material 7 begins to deform and take the form of a relief surface 2 of the stamp 1, forming on the main metallized surface the dot elements of relief 8, as a result of which the image rises above the surface of the material. In this case, the image elements lie in different planes. Therefore, such embossing is called multi-level. Relief relief stamping is clearly distinguishable only on materials with a fine-relief texture, smoothing well under a hot stamp, therefore, stamping is recommended to be used on traditional binding materials - kneechens, liderins, materials with a nitro-polyamide coating, on papers.

In this example, the relief elements 8 are made in the form of hemispheres, with diameters of 0.4 mm, a height of 0.2 mm at a distance from the center to the center of 0.8 mm. The amount of applied force is selected depending on the thickness of the starting material and the thickness of the metallization layer so that by applying pressure the material metallizing the main surface is torn to form microcracks 9 (see Fig. 3).

When such a surface is illuminated with white light (arrows C in Fig. 3), microcracks 9 change the direction of reflection of light rays (arrows O in Fig. 3), i.e. change the reflectivity of the surface, giving it a play of light, diamond shine. The volumetric effect formed on the surface of the material is most often used for labeling and packaging.

Information sources.

1. Eurasian patent No. EA 006404, publ. 12/29/2005 (prototype).

2. Russian patent for utility model No. 94745, publ. 05/27/2010.

3. Patent of Russia for utility model No. 114391, publ. 03/20/2012.

Claims (6)

CLAIM 1. Printing material, which is a sheet of flexible sheet material, where at least on the part of its main side the metallized layer is made with relief stamping, in which microcracks are made on the convex elements of the metallized layer. 2. The printing material according to claim 1, in which the convex elements are made with a maximum transverse dimension of 0.1-1.0 mm, a height of 0.01-1.0 mm at a distance from the center to the center of 0.1-1.0 mm . 3. The printing material according to claim 1, in which the flexible sheet material is a metallized self-adhesive paper with a thickness without a substrate of from 5 to 150 microns. 4. A method of manufacturing a printed material according to claims 1 to 3, in which the relief stamping of the main side of the sheet of flexible sheet material containing the metallized layer is performed, wherein the stamping of the flexible sheet material is stamped and counter stamped at a temperature of 1-150 ° C and the force from 0.01 to 50 tons to the formation of microcracks on the convex elements of the metallized layer. 5. The method according to claim 4, in which a stamp is used with an in-depth pattern located on the main side of the material, and a convex counter-stamp located on the other side of the material. 6. The method according to claim 4, in which the embossing operation is performed as embossing without foil on metallized self-adhesive paper.