JPS5995108A - Decorative plate and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a flat decorative plate hard to deform and with high impact resistance such as a mural or the like by a structure wherein a hard patterned core sheet is pinched between two pliable plastic sheets. CONSTITUTION:A decorative plate is a laminate A consisting in closely contacting transparent pliable sheets 31 and 32 on both sides of a hard core sheets 2, on the surface of which patterns 1 are applied by printing or the like. The closely contact lamination is an apparent adhesion obtained by only extracting the air in the space between the plastic sheets 31 and 32, between which the core sheet 2 is held without being bonded with one another. The circumferences of the plastic sheets 31 and 32 are bonded air-tight at the outer periphery of the laminate A by heat sealing or the like so as to form a bonded part 4 in order to eliminate the tendency for parting the plastic sheets under the state laminated only by closely contacting from each other. The edge of the core sheet 2 is effectively protected from external shocks, resulting in preventing cracks from developing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated decorative board and a method for manufacturing the same.

The purpose of the present invention is to provide a decorative board that is strong against impact and is flat and hard to deform, such as a wall hanging. A laminate of flexible plastic sheets is formed by closely contacting the plastic sheets, at least the patterned side of the plastic sheets is transparent, and a decorative plate (212 sheets) is formed by fully adhering the flexible plastic sheets to each other around the outer periphery of the laminate. The hard core sheet is sandwiched between the flexible plastic sheets and passed through nip rolls to deaerate both sides of the flexible plastic sheet and the core sheet to closely laminate them. This method of manufacturing a decorative board is characterized in that the two flexible plastic sheets are bonded together by pressurizing and heating at the outer periphery of the body.

Hereinafter, a more detailed description will be given based on the attached drawings.

FIG. 1 is a schematic cross-sectional view showing an example of a decorative board according to the present invention, and FIG. 2 is a schematic cross-sectional view showing an example of an apparatus for manufacturing the decorative board.

The decorative board of the present invention is a hard core sheet with a pattern/printed etc. on the surface as shown in Fig. 1! A transparent and flexible plastic sheet '3/, 3.2f is placed closely on both sides of the laminate A to form a laminate A.

This close lamination is the core sheet! and plastic sheet 31
, 32f, without adhering, simply remove all the air between the two to make them appear close to each other.

If laminated with adhesive, etc., completely interposed, the transparency of the adhesive itself will be poor, and the adhesive will completely penetrate the plastic sheet 3 and deteriorate the transparency, which will completely impede the decorative properties, and if heat fused, printing will be impaired. This is undesirable because the parts may collapse or the entire board may warp due to heat.

1, the above core sheet λ and plastic sheet 31, 3.
2 is a laminated state simply due to close contact and will easily peel off if left undisturbed. Therefore, it is necessary to airtightly adhere the periphery of the plastic sheets 31 and 32 to each other by heat sealing or the like on the outer periphery of the laminate A to form a bonded area.

Because this adhesive part is flexible, it is a core sheet! Effectively protect the edges from external impact and prevent cracking.

In the present invention, the core sheet 1 may be made of hard polyvinyl chloride, polyethylene terephthalate, cardboard, or the like, with a pattern printed on it, as long as the double-sided plastic sheets (J/, 32) are also hard. .

In addition, the flexible plastic sheets 31 and 32 may be made of soft polyvinyl chloride, ethylene-vinyl acetate copolymer, polyethylene, etc., as long as they are more flexible than the core sheet 2 and can be brought into close contact with the core sheet. Seatra can be used. Also, the flexible sheet on the pattern side of the core sheet I-3
'/It is necessary to use transparent materials for the closure so that it can be seen through.

Especially the core sheet! Hard polyvinyl chloride sheet T4 with excellent printability is used as a flexible plastic sheet 3/,
As the material 32, it is preferable to use an ethylene-vinyl acetate copolymer that can be brought into close contact with the hard polyhinyl chloride under pressure and has excellent heat sealability between the sheets 3/32.

Furthermore, if the flexible plastic sheet layer is fully impregnated with aromatic compounds, this will combine with the visual effect of the pattern 1 provided on the core sheet λ to appeal to the sense of smell, resulting in an excellent decorative effect. Even when completely impregnated with a fragrance agent, ethylene-vinyl acetate copolymer is suitable for the plastic sheet.

Next, a method for manufacturing a decorative board according to the present invention will be explained.

As shown in FIG. 2, first, a hard core sheet 2 is sandwiched between two flexible plastic sheets 3/32.

Here, a plastic sheet 3/32 td long may be used, and it may be heated to make it more flexible and easier to degas and seal.

Further, it is preferable that the core sheet 2 is cut to a regular length. Next, in this state and state, nip rolls jl, J-, 2 (
j, and gradually press the plastic sheet 3/, 32 from both sides by 1°] and remove the condensation nip roll t/, j
, 2 d heating 0-/lz and plastic sheet 3
The plastic sheet 3/, 32'il may be further softened to enhance the close contact effect, but in this case, if the roll temperature is excessive, the plastic sheet 3/, 32 may stick to the roll, melt, and roughen the pattern. Since the core sheet may be thermally deformed, it is set to, for example, below toC.

1, nip roll! It is also possible to improve the close contact effect by passing through three stages.

Next, the laminated body Ai formed in close contact with each other is placed on a sealing device consisting of, for example, a pedestal A and a heating plate 7, and is attached to the outer peripheral shape of the core sheet 2 attached to the lower surface of the heating plate 7 equipped with a heater button. The matching sealer 7-2 is lowered to seal the flexible plastic sheet 3/ on the outer periphery of the laminate A.

32 is bonded by applying a heating power of 0 pressure. At this time, the cutting blade 73 formed integrally with the sealer 72 is used to cut around the reed fitting part. After trimming, a decorative board as shown in FIG. 1 is obtained.

In this way, when the sealer 7.2 that matches the outer circumferential shape of the core sheet 2 is bonded, the core sheet! Even if the bonding part is long, it is possible to form the adhesive part ≠ sound without any gaps up to the end face.

In this example, trimming is performed at the same time as adhesion using the cutting blade 73 integrated with the sealer 72, but trimming may be performed in a separate process after adhesion.

As described in detail above, the decorative plate of the first invention is strong against impact and has rigidity, is difficult to deform, and has excellent decorative properties.

In addition, in the method for manufacturing a decorative board according to the second invention, a core sheet and a flexible plastic sheet are closely tied together, and then the flexible sheets are bonded together at a sufficient temperature by heating and pressing the flexible sheets together at a sufficient temperature. Because it is something that
This is an excellent invention that has never been seen before, as the layers are laminated at a relatively low temperature and are brought into close contact without causing thermal deformation, and the surrounding area is heated and pressurized at a sufficient temperature to bond, so there is no possibility of peeling. .

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of the decorative board of the present invention, and FIG. 2 is a schematic cross-sectional view of an apparatus for carrying out the method for manufacturing the decorative board of the present invention. /······pattern !・・・・・・Core sheet 3/,
3.2...Flexible plastic sheet A...
...Laminated body patent applicant Sunstar Co., Ltd.

Claims (1)

[Scope of Claims] (1) A laminate is formed by closely adhering flexible plastic sheets to both sides of a hard core sheet on which various patterns are printed, etc., and at least the side with the pattern is transparent among the plastic sheets. and a decorative board in which the flexible plastic sheets are adhered to each other on the outer periphery of the laminate. (21) Passing a hard core sheet between two flexible plastic sheets through nip rolls to deaerate the space between the flexible plastic sheet and both sides of the core sheet and laminate them closely; A method for manufacturing a decorative board, characterized in that the two flexible plastic sheets are then bonded together by applying pressure and heating to the outer periphery of the laminate.