JPH07186352A - Shaped sheet - Google Patents

Abstract

PURPOSE:To provide a shaped sheet strong against heat and tension and capable of being subjected to fine emboss processing. CONSTITUTION:Either one of glassine paper, parchment paper, vegetable parchment, coated paper and art paper is used as a base material sheet and a thermoplastic polyolefinic resin layer is laminated to the base material sheet to form a sheet and emboss patterns are provided to the polylefinic resin layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaped sheet for forming a concavo-convex pattern on the surface of a thermosetting decorative board or the like when it is manufactured.

[0002]

2. Description of the Related Art Conventionally, a heat-resistant film such as PET (polyethylene terephthalate) or a heat-resistant film is used as a shaping sheet for forming an uneven pattern on the surface of a thermosetting decorative plate or the like when it is manufactured. If not, films such as polyvinyl chloride, polypropylene, polyethylene, vinylon were used. In addition, Japanese Patent Publication Sho 61-280
No. 00 discloses a shaped film obtained by laminating a polyolefin resin on paper such as high-quality paper and kraft paper.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When a heat-resistant film such as is used as a shaped sheet, it has the advantage that the sheet does not deform even when subjected to heat pressure, but it has the drawback that it cannot be finely embossed because it is too hard. It was Further, when polyvinyl chloride, polypropylene, polyethylene, vinylon, etc. are used, embossing is easy, but there is a drawback that the sheet is stretched and deformed when heat pressure is applied. Further, it has a drawback that the film is easily broken due to its low strength. Further, these films are suitable or unsuitable for the mold release property depending on the type of the resin constituting the decorative board to be processed, and the use range is limited. Further, when a plastic film substrate is used, there are general defects such as difficulty in releasing after molding due to electrification, suction of dust, and curling due to lamination with polyolefin.

In the case of the conventional laminated shaped film of paper and polyolefin, it has good curl, antistatic property, and releasability, but when it is used for a thermosetting decorative board, the texture of the paper and the traces of fibers are left on the decorative board by heat and pressure. However, there was a defect that the unevenness of the surface was not faithful to the unevenness of the shaped film and could not be reproduced cleanly. The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and an object thereof is to provide a shaped sheet having a wide range of application, capable of fine embossing, less susceptible to deformation by heat and pressure. To do.

[0005]

Means for Solving the Problems As a result of repeated studies to achieve the above object, the present inventor has found that a base material sheet that is less likely to be deformed by heat and various tensions and a heat that enables fine embossing. It has been found that by laminating a plastic film and a shaped sheet, a shaped sheet having a wide range of application can be obtained by utilizing the advantages of both.

That is, in the shaped sheet of the present invention, any one of glassine paper, parchment paper, sulfuric acid paper, coated paper and art paper is used as a base sheet, and the base sheet is a polyolefin resin having thermoplasticity. A sheet is formed by laminating layers, and an embossed pattern is provided on the polyolefin resin layer. The thickness of the base sheet used in the present invention is preferably 3 to 250 μm, more preferably 12 to 100 μm. In the present invention, the use of glassine paper, parchment paper, sulfuric acid paper, coated paper, or art paper as the base sheet means that the polyolefin resin layer is deformed by heat and pressure, especially when used for a thermosetting decorative board. Is to control.

As the polyolefin resin layer, polymethylpentene, polypropylene, polyethylene or the like can be used. The thickness of the resin layer is
It is set according to the depth of the emboss to be processed. Further, the surface of the resin layer may be coated with a coating material (including silicone, wax, fluorine resin, etc.) having a releasing property for the thermosetting decorative board to be processed.

Further, as a method of laminating the base material sheet and the polyolefin resin layer as shown in FIG. 1, generally used dry lamination, wet lamination, extrusion coating of polyolefin resin, and hot pressure embossing are used. At the same time, it is possible to use a so-called doubling emboss or the like that is fused by heat and pressure. A known embossing method can be used as the embossing method applied to the polyolefin resin side of the shaped sheet formed by stacking. That is, a hot pressure embossing method using a flat plate or a roll plate, a method of transferring the uneven shape on the cooling roll used at the time of extrusion coating, a method of casting a molten resin, or the like can be used. As the embossed shape to be formed, a precision embossed pattern as shown in FIG. 2 is desirable. That is, it is an aggregate of patterns consisting of a group of irregularities or grooves forming parallel straight lines or curves and a closed boundary line surrounding it, and the parallel straight lines or straight lines of adjacent patterns sharing the boundary line. The direction of the group is different,
The line depth and the interval are 0.1 to 100 μm, and the direction difference between the line groups adjacent to each other across the boundary line is 5 ° or more. This type of pattern has a design feature in that the gloss of each closed region changes depending on the parallax. To make the directions of adjacent line groups all different, use "4" in Topology.
From the theorem of color problem, it is necessary and sufficient that there are four or more types of direction difference.

The thermosetting decorative board referred to in the present invention is made of titanium paper mixed with titanium oxide pigment, and melamine, diallyl phthalate, phenol, guanamine, urea resin, polyester, etc., whose surface is optionally printed. One or more sheets impregnated with the above resin, and if necessary, overlay a transparent paper on the printing side with the above resin impregnated on it, and core paper on the side opposite to the printing side. It is prepared by curing the above resin. At this time, the shape-imparting sheet of the present invention is laminated between the printing paper or the overlay paper and the heating plate or mirror surface plate, and after molding, the shape-imparting sheet is released.

[0010]

[Operation] According to the present invention, by using, as the base material sheet, a base material sheet such as glassine paper, parchment paper, sulfuric acid paper, coated paper, art paper, which is less likely to be deformed by heat and various tensions, Prevents deformation of the shaped film during press molding of the thermosetting decorative board, and by using a thermoplastic film that can be finely embossed on the embossed surface side, it has a three-dimensional effect and is excellent in design. Can be embossed.

In particular, when a glass sheet such as glassine paper having a fine texture and a good flatness is used as the base sheet, there is no difficulty in releasing the shape-forming sheet due to curl electrification and no dust suction. Excellent embossing for a thermosetting decorative board can be performed such that a faithful embossed pattern can be reproduced without formation of texture and fiber traces on the decorative board due to heat and pressure.

[0012]

EXAMPLES The specific contents of the present invention will be described in detail below with reference to examples. [Example 1] OPP on parchment paper (manufactured by Daio Paper Co., Ltd.)
(Nimura Chemical's FOR 20 μ) is dry laminated and OP
Heat is applied to the P side (150 ° C.), and a flat plate press is used to perform the precision embossing pattern of FIG.
4 types (°, 90 °) embossed.

Next, a balance sheet, a modified phenol core paper (manufactured by Ota Sangyo Co., Ltd.), a melamine resin-impregnated titanium paper, a melamine resin impregnated overlay (OL-25 manufactured by Ota Sangyo), and the shaping sheet (so that the embossed surface contacts the overlay)
Are sequentially laminated, and a hot press (80 kg / cm ² , 135
After 15 minutes (° C., 15 minutes), since the sheet itself does not curl and static electricity is not generated, workability at the time of mold release is good, and no dust is sucked, so that a clean molded product can be obtained. Also, due to the heat pressure of the press molding, unevenness of the paper texture and fiber traces do not transfer to the molded product.Because of the backing of the paper, there is no stretch or distortion of the embossed uneven pattern due to the heat pressure during press molding, and it is faithful. The unevenness of the shaping sheet could be shaped on the high-pressure melamine decorative board.

[Example 2] SK coated paper (Sanyo Kokusaku Pulp (manufactured) 104.7 g / m ² ) was coated with OPP (Nimura Chemical F
OR 20μ) is dry-laminated, and Example 1 is applied to the OPP side.
Apply the same emboss as. Next, balance sheet, modified phenol core paper (Ota Sangyo), melamine resin-impregnated titanium paper, melamine resin-impregnated overlay (Ota Sangyo OL-
25) The above shaped sheets (in which the embossed surface is in contact with the overlay) are sequentially laminated, and hot pressed (80 kg / cm
⁽² , 135 ° C, 15 minutes), the sheet itself does not curl and does not generate static electricity, so workability at mold release is good,
Since there is no suction of dust, we were able to obtain a clean molded product.
Also, due to the heat pressure of the press molding, unevenness of the paper texture and fiber traces do not transfer to the molded product.Because of the backing of the paper, there is no stretch or distortion of the embossed uneven pattern due to the heat pressure during press molding, and it is faithful. The unevenness of the shaping sheet could be shaped on the high-pressure melamine decorative board.

[0015]

As described above, according to the present invention, there is provided a shaped sheet which can be used during the molding of various decorative boards, is resistant to heat and tension, and can be finely embossed. Can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a shaped sheet of the present invention.

FIG. 2 is a plan view showing an example of a precision embossing pattern formed on the shaped sheet of the present invention.

Claims (3)

[Claims] 1. Glassine paper, parchment paper, sulfuric acid paper,
Either coated paper or art paper is used as a base sheet, a polyolefin resin layer having thermoplasticity is laminated on the base sheet to form a sheet, and an embossed pattern is provided on the polyolefin resin layer. Shaped sheet characterized by 2. The shaped sheet according to claim 1, wherein the shaped sheet is for a thermosetting decorative board. 3. The base sheet has a thickness of 3 to 250 μm.
m, more preferably 12 to 100 μm, the shaped sheet according to claim 1 or 2.