JPH05104628A - Production of decorative sheet having embossed pattern surface - Google Patents

Abstract

PURPOSE:To produce a decorative sheet having an embossed pattern surface without interposing an air bubble between respective laminated films even in emboss processing due to the irradiation with high frequency waves using an embossing plate having a deep embossed pattern. CONSTITUTION:Two or more thermoplastic resin films 1 are laminated in such a state that an adhesive 3 is interposed between the films and covered with an embossing plate having a deep embossed pattern to be subjected to emboss processing while irradiated with high frequency waves. By laminating the films through the adhesive 3, the formation of an air bubble between the films can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative sheet having an uneven surface suitable for interior and exterior of buildings, finishing of furniture, and other surface decoration of articles.

[0002]

2. Description of the Related Art Various attempts have been made as conventional methods for producing a decorative sheet having an uneven surface, for example, a base PVC film, a colored PVC film, a patterned PVC film, a transparent PVC film. That is, there is a method of stacking the films constituting the PVC floor tile in the order of constitution, embossing the transparent PVC film on the surface with a high frequency using an embossing plate, and simultaneously laminating each sheet.

However, in the prior art as described above, air bubbles are mixed between the laminated films, and particularly in the embossing using a deep embossing plate, the degree of the inclusion of the air bubbles is great. Met.

Therefore, in order to prevent the inclusion of air bubbles, there is a method of providing a hole for removing air bubbles in a laminated film, but even with this method, the air bubbles between the sheets cannot be completely removed.

[0005]

The object of the present invention is to produce an embossed plate with a deep plate depth without embedding air bubbles between the laminated films even in the embossing process by irradiating with high frequency. The present invention provides a method for producing a decorative sheet having an uneven surface, which can be used.

[0006]

The method for producing a decorative sheet having an uneven surface according to the first aspect of the present invention comprises laminating two or more thermoplastic resin films with an adhesive agent between the films, It is characterized in that an embossing plate having a deep plate depth is put on and embossing is performed by irradiating a high frequency.

The method for producing a decorative sheet having a textured surface according to the second aspect of the present invention is the same as the method for producing a decorative sheet having a textured surface according to the first aspect of the invention, wherein an adhesive is applied between the films at the same time as embossing. It is characterized by being laminated through.

The method for producing a decorative sheet having a textured surface according to the third aspect of the present invention is the method for producing a decorative sheet having a textured surface according to the first or second aspect, wherein at least one surface of the thermoplastic resin film or It is characterized by printing on both sides.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 illustrates the basic structure of a decorative sheet having an uneven surface obtained by the manufacturing method of the present invention.
The thermoplastic resin films 1 and 2 are laminated with an adhesive 3 therebetween to form an embossed pattern 4.

Examples of the thermoplastic resin films 1 and 2 include a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl alcohol film, a polyolefin resin film, a polyester resin, and an acrylic resin film, but high frequency dielectric heating is easy. It is desirable to use a polyvinyl chloride film, an acrylic resin film, or the like, which can be obtained.

As the adhesive 3, phenol resin, furan resin, urea resin, melamine resin, polyester resin, polyurethane resin, epoxy resin, etc.
If necessary, isocyanate, a crosslinking agent such as amine, methyl ethyl ketone peroxide, hydroperoxide, a polymerization initiator such as azobisisobutyronitrile,
The one to which a polymerization accelerator such as cobalt naphthenate or dimethylaniline is added is used.

FIG. 2 shows an example of a decorative sheet having an uneven surface to be used as a floor tile, which is obtained by the manufacturing method of the present invention. A printing pattern 8 is provided on the lower side of the transparent printing film 5. An embossed pattern 4 is formed by laminating a colored film 6, a backing film 7 and a colored film 6 in this order with adhesives 3 interposed between the films.

In the embodiment of FIG. 2, the transparent printing film 5 is the same as the above-mentioned thermoplastic resin film. The transparent printing film 5 may be colorless and transparent or colored and transparent. The printed pattern 8 may be printed (reverse printing) on the lower side of the printing film 5 as shown in FIG. 2, or may be printed on the upper side of the colored film 6 as shown in FIG. Furthermore, as shown in FIG. 3, printing (back printing) may be performed on the lower side of the printing film 5 and on the upper side of the colored film 6. Furthermore, as shown in FIG. 4, the transparent thermoplastic resin film 9 may be printed on the upper side of the transparent printing film 5 as a protective film, and the transparent thermoplastic resin film 9 may be laminated thereon with the adhesive 3 interposed. As a printing ink for providing the printed pattern 8, a known one can be used, and the printing method is also a known method such as gravure printing, offset printing, flexographic printing, silk screen printing and the like.

The colored film 6 is made of the same material as the above-mentioned thermoplastic resin film and mixed with a coloring agent. Alternatively, the above-mentioned thermoplastic resin film coated with a coloring paint may be used as the coloring film.

The backer film 7 is the lowermost layer of the decorative tile, and reduces expansion and contraction of the entire decorative tile.
Moreover, it is for giving a required thickness to a decorative tile. As the backer film 7, one similar to the above-mentioned thermoplastic resin film and mixed with a large amount of a filler is used, but in consideration of dimensional stability and heat resistance, one made of polyvinyl chloride (often used as a recycled product) Is preferred).

In the decorative sheet having an uneven surface according to the present invention, the number of films to be laminated may be two or more. In addition to the embodiments shown in FIGS. 1, 2, 3 and 4,
Various film laminated configurations are conceivable, and may be appropriately configured according to each application. Further, the pattern print pattern 8 may be further provided in the lower layer, or a plurality of colored films may be used.

Next, embossing in the method for producing a decorative sheet having an uneven surface according to the present invention will be described. Examples of the embossing plate used in the present invention include those produced by etching, mill extrusion, electroforming, shaping with silicon resin, thermosetting resin, ionizing radiation curing method, etc. Examples include those copying various uneven shapes of natural products such as wood grain, stone grain, and cloth grain, character symbols, abstract patterns, and combinations of these patterns. The embossing plate used in the present invention has a relatively deep plate depth, and the plate depth is 1 to 10
It is about mm. Using the above embossing plate, embossing is performed by a high frequency embossing method. The embossing may be performed only from the outermost surface side, the back surface side, or both front and back surfaces.

As a method for producing a decorative sheet having an uneven surface according to the present invention, the films are stacked in the order of constitution via an adhesive and nipped by a nip roll or the like,
After laminating and integrating the films, a method of embossing with high frequency using the embossing plate, or alternatively, stacking the films in order of constitution with an adhesive, and then embossing with high frequency using the embossing plate There is a method of integrating each film at the same time as applying, but the former method is excellent in stability of the laminated state of each film and processability of embossing.

Example 1 A wood grain pattern was printed by gravure printing on a colored vinyl chloride film (W type, made by Riken Vinyl) having a thickness of 80 μm,
On top of that, urethane resin adhesive (U-23, made by Dainichi Seika)
0) was applied by the kiss roll coating method so that the thickness would be 10 μm. Then, a 200 μm thick transparent vinyl chloride film (FC-018, manufactured by Riken Vinyl) was stacked on the adhesive surface of the colored vinyl chloride film, and laminated with a nip roll (nip temperature 55 ° C., nip pressure 7 kg). The obtained laminated film was embossed using a silicon embossing plate with a plate depth of 5 mm from the transparent vinyl chloride film side by high frequency (welding current 7 A, 15 seconds, cooling time 30 seconds). The obtained decorative sheet was free from bubbles between the transparent vinyl chloride film and the colored vinyl chloride film.

Example 2 A transparent vinyl chloride film having a thickness of 200 μm (manufactured by Riken Vinyl, FC-018) and a colored vinyl chloride film having a thickness of 80 μm (manufactured by Riken Vinyl, W type) were each gravure-printed to give a grain pattern. Printed. Then, a urethane resin adhesive (U-230, manufactured by Dainichiseika Co., Ltd.) was applied to the printed surface of the colored vinyl chloride film to a thickness of 1 by a kiss roll coating method.
The coating was performed so as to be 0 μm. Next, the adhesive surface of the colored vinyl chloride film and the printed surface of the transparent vinyl chloride film were overlapped so as to be in contact with each other, and laminated with a nip roll (nip temperature 55 ° C., nip pressure 7 kg). Further, a urethane resin adhesive (U-230, manufactured by Dainichiseika Co., Ltd.) was applied on the colored vinyl chloride film side by a kiss roll coating method so as to have a thickness of 15 μm, and then the backer film for vinyl chloride flooring was applied as described above. The colored vinyl chloride film was laminated on the outer adhesive surface and laminated with a nip roll (nip temperature 55 ° C., nip pressure 7 kg). The obtained laminated film was embossed using a silicon embossing plate with a plate depth of 5 mm from the transparent vinyl chloride film side by high frequency (welding current 7 A, 15 seconds, cooling time 30 seconds). The obtained decorative sheet was free of air bubbles between the transparent vinyl chloride film and the colored transparent film and between the colored vinyl chloride film and the flooring backer film.

[0021]

As described above, according to the present invention, since each film to be laminated is laminated with an adhesive agent between the films, each laminated film in the conventional decorative sheet having an uneven pattern surface. It is possible to prevent air bubbles from being mixed between the films. Further, by using the adhesive, it is possible to prevent air bubbles from being mixed between the laminated films even when high-frequency embossing is performed using an embossing plate having a deep plate depth.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a decorative sheet having an uneven pattern surface, which is obtained by the manufacturing method of the present invention.

FIG. 2 is a cross-sectional view showing another example of a decorative sheet having an uneven surface obtained by the manufacturing method of the present invention.

FIG. 3 is a cross-sectional view showing still another example of a decorative sheet having an uneven surface obtained by the manufacturing method of the present invention.

FIG. 4 is a cross-sectional view showing still another example of a decorative sheet having an uneven pattern surface obtained by the manufacturing method of the present invention.

[Explanation of symbols] 1 thermoplastic resin film 2 thermoplastic resin film 3 adhesive 4 embossed pattern 5 transparent printing film 6 colored film 7 backer film 8 pattern printed pattern 9 transparent thermoplastic resin film

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Claims (3)

[Claims] 1. A method in which two or more thermoplastic resin films are laminated with an adhesive agent between the films, covered with an embossing plate having a deep plate depth, and subjected to high-frequency irradiation for embossing. And a method for producing a decorative sheet having an uneven surface. 2. The method for manufacturing a decorative sheet having a textured surface according to claim 1, wherein the films are laminated together with an adhesive between the films at the same time as embossing, and the decorative sheet having a textured surface. Manufacturing method. 3. The method for producing a decorative sheet having an uneven surface according to claim 1 or 2, wherein at least one surface or both surfaces of the thermoplastic resin film is printed. A method for manufacturing a decorative sheet having the same.