JPH0311269B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a decorative backing veneer to which a relatively thin backing material is attached.

In the past, lined decorative veneers have been proposed and some have been commercially available, but all of these have used thick backing materials, and very few have used thin backing materials. This is due to unresolved manufacturing problems, one of which is the adhesive seeping out to the back side. If the adhesive seeps to the back side, the product will stick to the conveyor table during hot pressing, making it difficult to peel off.
If you try to force it off, the product will tear. In order to improve this problem, it is possible to use an aluminum plate treated with fluororesin or silicone resin as a transport platform, but with this method, the moisture contained in the adhesive cannot escape during hot pressure, resulting in punctures when the pressure is released. This causes an adhesion failure called. In the past, in order to avoid this puncture, it was necessary to use a thick backing material to prevent the adhesive from seeping out.

The present invention provides a method for producing a backing decorative veneer that does not cause any trouble in production even if the adhesive seeps onto the back side.Hereinafter, embodiments of the present invention shown in the drawings will be described. .

In the present invention, a backing material 3 is temporarily pasted on a hygroscopic conveying table 2 covered with an air-permeable release sheet 1, a dried decorative veneer 5 is layered via an adhesive 4, and the entire surface is heated and pressed. The veneer 5 and the backing material 3 are integrated to form a backing decorative veneer A, which is taken out from the heat press machine 6 while being placed on a hygroscopic conveyance table, and the surface finish is applied to the decorative veneer 5 as necessary. The gist of the present invention is a method for producing a decorative backing veneer A, which is characterized in that the backing decorative veneer A is peeled off from the transport table 2.

The decorative veneer 5 used in the present invention is made of various precious woods such as cherry, oak, and teak with a thickness of 0.2 to 3.0 mm.
Use a piece that has been cut as thin as possible. After cutting, it is preferable that these be dried to a moisture content below the air-dried moisture content and used in a relatively dimensionally stable state. In addition, dimensional stabilization treatment, flame retardant treatment, etc. may be applied as necessary.

As the backing material 3, paper, nonwoven fabric, or woven fabric using natural or artificial fibers is selected and used as necessary. Specifically, a nonwoven fabric having a weight of 15 to 150 g/m ² can be suitably used. To temporarily attach the backing material to the air-permeable release sheet, it is sufficient to fasten several points around the backing material with cellophane tape or the like.

As the adhesive 4 for bonding the decorative veneer 5 and the backing material 3, a known adhesive is selected depending on the intended use of the invention. For example, when used for surface materials such as furniture, acrylic resin or vinyl urethane resin adhesives are preferably used because they are often adhered to curved substrates. When used on walls, etc., it may be hardened by adding urea resin or the like. These adhesives are formulated to minimize leaching from the surface of the veneer or the backing material during curing, and are dried in the latter half of application (air-dried for about 1 hour or heated with an infrared lamp, etc. for about 20 seconds to 1 minute) to evaporate the moisture contained. It is preferable to allow the curing reaction to proceed to a certain extent, as this will further reduce leaching. It is easier to apply the adhesive to the backing material side.

As the air-permeable release sheet 1, a woven fabric treated with a fluororesin is suitable. Other substances with the same efficacy may be used. Care should be taken when using silicone resin-based products, as they will inhibit painting if they adhere to the product. Non-breathable materials such as polyester film cannot be used because they will cause punctures.

As the hygroscopic transport platform 2, a hygroscopic plate-like material such as plywood, hardboard, particle board, cardboard, etc. can be used. Since it is used as a transport platform, mechanical strength is required, and the lower surface of the plate-like body may be reinforced with an aluminum plate or the like. After being used under heat and pressure, it goes through a cooling and dehumidification process before being reused. The air-permeable release sheet is attached to the conveyor table using double-sided adhesive tape or adhesive.

The heat press machine 6 may be one for manufacturing decorative plywood, and the heat pressure conditions will vary depending on the thickness of the veneer and the adhesive, but in the case of a veneer with a thickness of about 0.3 mm and an acetic acid-vinyl acrylic resin adhesive, the temperature is 110℃. , 5Kg/cm ² for about 1 minute.
When taken out from the hot press and peeled off from the release sheet,
Since the product of the present invention is soft, it is kept flat and cooled to prevent it from becoming curly.

Since the present invention is manufactured by the method described above, the effect is that the moisture contained in the decorative veneer 5 and the adhesive 4 is transferred to the hygroscopic conveyor table 2 through the breathable release sheet 1. The so-called flat tire phenomenon does not occur. Furthermore, even if the adhesive blows out to the back side, it can be peeled off because there is an air-permeable release sheet, and there is no difficulty in peeling off as in the past. This has the effect of allowing the use of a relatively thin backing material.

In addition, when the product of the present invention is taken out from the hot press, it is fixed to the conveyor table 2 via the release sheet 1 due to the anchoring effect of the adhesive, so it can be left as it is.
If necessary, various finishing treatments such as chemical treatment, polishing, painting, and film overlay can be applied. Therefore, most of the processes after heat pressing can be carried out on the decorative plywood production line.
In other words, the product is not a sheet-like product that is difficult to handle, but a plate-like product that is suitable for production lines, so productivity is extremely high.

[Brief explanation of the drawing]

The drawings show the embodiment of the present invention in the order of the steps, and FIG. 1 is an explanatory diagram of the hot pressing process, FIG. 2 is a side view of the state taken out from the hot pressing machine, and FIG. 3 is an explanatory diagram of the surface finishing process. FIG. 4 is an explanatory diagram of the peeling process of the backing decorative veneer, and FIG. 5 is a side view of the product. DESCRIPTION OF SYMBOLS 1... Breathable mold release sheet, 2... Hygroscopic conveyance table, 3... Backing material, 4... Adhesive, 5... Decorative veneer, 6... Heat press machine, A... Backing decorative veneer.

Claims (1)

[Claims] 1. Temporarily paste the backing material on a hygroscopic conveyance table covered with an air-permeable release sheet, layer the dried decorative veneer with adhesive, and heat-press the whole to integrate the decorative veneer and the backing material. A method for manufacturing a lined decorative veneer, which comprises: preparing a lined decorative veneer by removing the lined decorative veneer from a heat-pressing machine while placed on a hygroscopic conveyance table, and peeling the lined decorative veneer from the conveyance table.