JPH0761109A - Emboss forming transfer sheet - Google Patents

Abstract

PURPOSE:To provide the title transfer sheet capable of forming a design consisting of two or more kinds of emboss recessed parts different in depth on the surface of the foamable resin layer of vinyl chloride type foamed leather. CONSTITUTION:In a transfer sheet 1 constituted of a transfer base material 1, a release layer 2, printing patterns printed using two or more kinds of printing inks different in the content of a foaming suppressing agent and an adhesive layer 4, transfer is applied to the foamable resin layer of vinyl chloride type foamed leather to stably form a design consisting of two or more kinds of patterns different in the depth of recessed parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emboss-forming transfer sheet for forming recesses on the surface of a material to be transferred having an expandable resin layer by suppressing foaming.

[0002]

2. Description of the Related Art Conventionally, a vinyl chloride foamed leather in which an embossed concave portion is formed in a foamable resin layer made of polyvinyl chloride by a transfer sheet using an ink containing a foaming inhibitor has been used for bags, shoes and furniture interiors such as bags. Used for wood materials and interior materials. However, the embossed recesses formed by the foam-suppressing ink of these conventional products are those in which recesses having a constant depth are formed in a pattern, or the ink containing the foam-suppressing agent is used in a printing plate having gradation. Of the continuous tone concave portion formed by the transfer sheet printed by the above method, the former one has only a certain depth of the concave portion and only a monotonous design effect can be obtained, and the latter one has a foam suppressing ink. Since it is composed of an ink layer printed in halftone dots and having gradation, it has the drawback that the foaming suppression effect becomes unstable, the reproducibility of recess formation is poor, and a highly decorative design cannot be obtained stably. Atsuta

[0003]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a vinyl chloride foamed leather having a foamable resin layer whose surface is made of polyvinyl chloride and having embossed recesses formed in the foamable resin layer. A transfer sheet for forming embossing for forming two or more types of patterned recesses. By using the transfer sheet, a combination of a pattern of deep recesses and a pattern of shallow recesses allows a polyvinyl chloride foam leather to be formed. Is to enhance the design effect of the surface.

[0004]

[Means for Solving the Problems] A transfer substrate, a release layer, a pattern printing layer, and an adhesive layer are laminated in this order, and the pattern printing layer has two or more types of printing with different contents of a foaming inhibitor. It is a transfer sheet for embossing formation, which is composed of a printed pattern printed with ink.

The pattern printing layer is composed of a printing pattern printed with two or more kinds of printing inks having different foaming inhibitor contents and a printing pattern printed with a printing ink containing no foaming inhibitor. The above-mentioned transfer sheet for embossing.

[0006]

In the present invention, a transfer sheet composed of a transfer base material, a peeling layer, a printed pattern printed with two or more kinds of printing inks having different contents of the foaming inhibitor, and a transfer sheet composed of an adhesive layer is used. By transferring to the foamable resin layer of the system foam leather,
It is possible to stably form a design including two or more types of patterns having different recess depths. Furthermore, by adding a printing pattern printed with a printing ink that does not contain a foaming inhibitor to the pattern printing layer of the transfer sheet, it becomes possible to diversify the design, and thus a PVC foam leather having a more excellent design effect. Is obtained.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a laminated structure of a first embodiment of the present invention, and FIG.
Is a cross-sectional view showing a laminated structure of the second embodiment of the present invention, FIG. 3 is a cross-sectional view showing a state in which the transfer sheet shown in FIG. 2 is a cross-sectional view of a transfer material having a foamable resin layer on which the transfer sheet shown in FIG. 2 is transferred, and FIG. 5 is a cross-sectional view of the transfer-completed material shown in FIG. 4 is a cross-sectional view of the transfer-completed transfer material shown in FIG. 4 in a foamed state. 1 is a transfer sheet substrate, 2 is a release layer, 3 is a pattern printing layer, and 3a is a high content of a foaming inhibitor. A printed pattern, 3b is a printed pattern having a low content of a foaming inhibitor, 3c is a printed pattern containing no foaming inhibitor, 4 is an adhesive layer, 5 is a foamable resin layer, and 6 is a transfer substrate.

The transfer sheet substrate 1 used in the present invention is a plastic film having excellent heat resistance such as polyethylene terephthalate or biaxially oriented polypropylene, or a laminate obtained by extrusion laminating a polyolefin resin such as polypropylene on paper. The body etc. can be used.
A 12-25 micron thick polyethylene terephthalate film is suitable.

As the release layer 2, an acrylic resin, a cellulose resin, polyvinyl chloride, a vinyl chloride-acrylic copolymer resin or the like can be used. Since the peeling layer 2 becomes a layer that forms the transfer surface of the transfer target when it is transferred to the foamable resin layer 5 using the transfer sheet of the present invention, it adheres to the protective layer provided on the transfer surface of the transfer target. It is necessary to select the resin in consideration of the property. Considering the above points, acrylic resins and cellulose resins are suitable. The release layer 2 is generally composed of a non-colored transparent layer, but it may be a transparent colored layer if necessary in order to enhance the design.

The ink for forming the pattern printing layer 3 is a usual polyvinyl chloride printing ink made of urethane resin, acrylic resin, vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-acrylic copolymer resin, etc. However, when physical properties are particularly required, isocyanate is preferably added to use as a two-component curing type ink. When used as an ink for suppressing foaming, a known foaming inhibitor such as trimellitic anhydride is added to the above ink before use. The foaming inhibitor is added to the ink in a range of up to 15 parts by weight with respect to 100 parts by weight of the ink. The depth of the foam suppression recesses in the final product can be arbitrarily adjusted by the addition amount of the foam suppression agent.

The adhesive layer 4 has good adhesiveness to vinyl chloride resin, modified vinyl resin, acrylic resin, vinyl chloride-acrylic copolymer resin, vinyl chloride-vinyl acetate copolymer resin, and other vinyl chloride resins. Any resin can be used. When transferred to the surface of the foamable resin layer 5 by the transfer sheet, the adhesive layer 4 becomes a layer interposed between the printed pattern 3 containing the transferred foaming inhibitor and the foamable resin layer 5, and the adhesive layer 4 becomes If it becomes thicker, the effect of suppressing foaming will be hindered. Therefore, a suitable thickness of the adhesive layer 4 is 2 to 5 microns.

The transfer sheet of the present invention comprises a transfer sheet substrate 1
The release layer 2, the pattern printing layer 3, and the adhesive layer 4 are usually produced by in-line printing with a solid pattern plate for gravure printing, but the release layer 2 and the adhesive layer 4 are roll coated. It may be performed in a separate step depending on the conditions. It is suitable to use a solid plate having a plate depth of 30 to 50 μm for gravure printing. The adhesive layer 4 is preferably printed using a relatively shallow solid plate for gravure printing with a plate depth of about 30 microns. By thinning the adhesive layer 4,
When transferred to the surface of the foamable resin layer 5, the foaming inhibitor in the printed pattern layer 3 easily acts on the foamable resin layer 5 through the adhesive layer 4.

The printed pattern 3a having a high content of the foaming inhibitor and the printed pattern 3b having a low content of the foaming inhibitor are both 30-5.
Printing is performed using a solid pattern plate having a plate depth of 0 micron. The degree of foaming suppression, that is, the depth of the recess after foaming can be adjusted by the amount of the foaming inhibitor added to the ink.
It is a weight part, and the addition amount can be arbitrarily set in accordance with the required depth of the recess within the range. By using the ink to which the foaming inhibitor is added, it is possible to stably reproduce the foaming concave portions having different depths.

The transfer sheet shown in FIG. 1 is composed only of a printed pattern 3a having a high content of a foaming inhibitor and a printed pattern 3b having a low content of a foaming inhibitor, and does not contain a foaming inhibitor. 3c is not provided. In the case of the transfer sheet, a solid pattern plate having a plate depth of 30 to 50 microns causes a portion printed with a printing ink having a high content of a foaming inhibitor to be a printed pattern 3a having a high content of a foaming inhibitor. Similarly, with a solid pattern plate having patterns with different plate depths of 30 to 50 microns, the portion printed with the printing ink having a low content of the foaming inhibitor is the printed pattern 3b having a low content of the foaming inhibitor. The ink containing the foaming inhibitor for printing the printed pattern may be a colored ink or a non-colored ink, and is arbitrary.

In the transfer sheet shown in FIG. 2, the above-mentioned pattern printing layer 3 is formed by a printing pattern 3a having a high content of a foaming inhibitor, a printing pattern 3b having a low content of a foaming inhibitor, and a printing pattern containing no foaming inhibitor. It is composed of 3c. The printing pattern 3c containing no foaming inhibitor may be printed with a solid pattern plate having a plate depth of 30 to 50 microns or with a gradation pattern plate. Further, the printed pattern 3c not containing the foaming inhibitor may be a pattern on the entire surface of the transfer sheet, or only in a portion without the printed pattern 3a having a high content rate of the foaming inhibitor and the printed pattern 3b having a low content rate of the foaming inhibitor. You may print it.

FIG. 3 shows a state in which the transfer sheet shown in FIG. 1 is used to transfer to the expandable resin layer 5 of the transferred substrate 6, and FIG. 5 shows a state in which the transferred expandable resin layer 5 is foamed. It is shown. The expandable resin layer 5 is usually colored in a color suitable for the intended design, and when transfer and foaming is performed using the transfer sheet, a pattern consisting of deep recesses on a flat colored background. A design is obtained which is a combination of a pattern consisting of the above and a shallow recess. By designing the pattern of the deep recess and the pattern of the shallow recess with different colors or with the same color, the depth and color tone of the recess can be combined to diversify the design. Since all the printed patterns containing the foaming inhibitor are solid patterns, the depth of the recesses can be stably reproduced and the design effect can be further enhanced.

FIG. 4 shows a state in which the transfer sheet shown in FIG. 2 is used for transferring to the expandable resin layer 5 of the transferred substrate 6, and FIG. 6 shows a state in which the transferred expandable resin layer 5 is foamed. It is shown. When the above-mentioned transfer sheet is used, in addition to the effect of the combination of the color tone and the pattern of the deep recesses and the pattern of the shallow recesses on the flat colored background, the foaming inhibitor printed with the printing ink containing no foaming inhibitor is used. Printed patterns that do not include can also be used, which makes it possible to reproduce even more diverse designs and enhances designability. The print pattern 3c that does not contain a foaming inhibitor can be arbitrarily set to be a solid pattern or a gradation pattern.

In order to produce a synthetic leather having on the surface thereof a foamable resin layer 5 having irregularities made of polyvinyl chloride using the transfer sheet of the present invention, an adhesive is applied to a base cloth,
A vinyl chloride resin, a plasticizer, a stabilizer, a filler, a colorant, a foaming agent, and other materials are kneaded therewith using a Banbury mixer or a mixing roll, and a foamable resin layer 5 formed by a calendar method is laminated. To do. The foamable resin layer 5 may be formed by a paste cast method. The surface of the transfer sheet shown in FIGS. 1 and 2 on which the pattern printing layer 3 is present is superposed on the surface of the foaming resin layer 5, and the transfer layer including the pattern printing layer 3 is bonded by thermocompression bonding to the foaming resin layer. Transfer to 5 sides.
By providing a protective layer on the surface of the transfer layer including the transferred pattern printing layer 3 and heating the expandable resin layer 5 to complete the expansion, a vinyl chloride foam leather having concave portions on the surface can be obtained.

Example 1 A release layer having a composition of (1) was applied to one side of a 25-micron polyethylene terephthalate film by a gravure printing with a solid plate having a plate depth of 30 microns, and then the release layer surface was coated with ( A pattern printing layer consisting of a check pattern was formed by gravure printing on a solid plate having a plate depth of 40 microns using the foam suppression ink 1 and the foam suppression ink 2 having the composition shown in 2), and the plate depth was 30 microns on the printed pattern layer surface. A transfer sheet was prepared by providing an adhesive layer by gravure printing with the adhesive composition having the composition shown in (3) in the solid plate of No. 3. On the other hand, the surface of the fabric was coated with the undercoating agent composition shown in (4) at a solid content of 15 g / m ² and the expandable vinyl chloride composition shown in (5) was applied at 280 g / m ^{2 on} the surface of the undercoating layer. A post-gelation was carried out to prepare a transferred substrate having a foamable resin layer on the surface.
The foamable resin layer surface of the transfer base material and the adhesive layer surface of the transfer sheet are overlapped and passed between a heat roller and a rubber roller at 150 ° C. under the conditions of a linear pressure of 5 kg / cm and a speed of 5 m / min. After that, the transfer sheet substrate was peeled off, and the pattern ink layer was transferred onto the foamable resin layer surface of the substrate to be transferred. Then 2
By heating at 00 ° C. for 60 seconds to complete the foaming of the foamable resin layer, a vinyl chloride foam leather having a two-step depth recess and excellent in design was obtained. (1) Release agent (parts by weight) Ethylcellulose 1 Methylethylketone 99 (2) Foam suppression ink 1 PVC-vinyl acetate copolymer resin (polymerization degree 650) 15 Pigment 5 Trimellitic anhydride 15 Methylethylketone 65 Foam suppression ink 2 PVC-vinyl acetate Copolymer resin (Polymerization degree 650) 15 Pigment 3 Trimellitic anhydride 5 Methyl ethyl ketone 77 (3) Adhesive Methyl methacrylic acid resin 30 Toluene 70 (4) Undercoating agent Polyvinyl chloride latex 53 Carboxyl vinyl polymer 35 Ammonia water ( PH7-8) 12 (5) Foamable vinyl chloride composition Polyvinyl chloride 50 Dioctyl phthalate 46 Stabilizer (ZnO) 1.0 Stabilizer (Ba-Zn) 0.5 Azodicarbonamide 2.5 Pigment Suitable amount

[0020]

EFFECTS OF THE INVENTION A printed pattern printed with two or more kinds of printing inks having different contents of a transfer base material, a release layer, and a foaming inhibitor,
A transfer sheet composed of an adhesive layer, or the above transfer consisting of a print pattern printed with two or more printing inks having different foaming inhibitor contents and a print pattern printed with a printing ink containing no foaming inhibitor By using a sheet to transfer the foamed resin layer of PVC-based foamed leather by providing a pattern printing layer and foaming, two or more types of embossed concave portions with different color tones and depth can be stably reproduced. Therefore, a vinyl chloride foamed leather having an excellent design effect can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a laminated structure of a first embodiment of the present invention.

FIG. 2 is a sectional view showing a laminated structure of a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state in which the transfer sheet shown in FIG. 1 is used to transfer the transfer target material having a foamable resin layer on the surface.

FIG. 4 is a cross-sectional view showing a state in which the transfer sheet shown in FIG. 2 is used for transfer onto a transfer target material having a foamable resin layer on its surface.

FIG. 5 is a cross-sectional view showing a state in which the transfer-completed transfer-completed material shown in FIG. 3 is foamed.

FIG. 6 is a cross-sectional view showing a state in which the transfer-completed transfer material shown in FIG. 4 is foamed.

[Explanation of symbols]

 1 Transfer sheet substrate 2 Release layer 3 Pattern printing layer 3a Printed pattern with high content of foam suppressor 3b Printed pattern with low content of foam suppressor 3c Printed pattern without foam suppressor 4 Adhesive layer 5 Foaming property Resin layer 6 Transferred substrate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tetsuya Fukuda, Tetsuya Fukuda, 10 Uzumasa Shangbu-cho, Ukyo-ku, Kyoto, Japan Within Dai Nippon Prinetex Co., Ltd. Within Printex Co., Ltd.

Claims (2)

[Claims] 1. A transfer sheet substrate, a release layer, a pattern printing layer,
For embossing, characterized in that the adhesive layer is laminated in order, and the pattern printing layer is composed of a printed pattern printed with two or more kinds of printing inks having different foaming inhibitor contents. Transfer sheet. 2. The pattern print layer is composed of a print pattern printed with two or more kinds of printing inks having different foaming inhibitor contents and a print pattern containing no foaming inhibitor. The transfer sheet for embossing according to claim 1.