JPH0724986A - Production of polyester decorative panel - Google Patents

Abstract

PURPOSE:To efficiently produce a polyester decorative panel in reduced equipment space using an unsaturated polyester resin. CONSTITUTION:Decorative raw paper 4 having a pattern layer 5 provided thereto is laminated to the upper surface of a base material 2 through an adhesive 3 and, after an air drying type non-wax unsaturated polyester resin 6 is applied to the entire surface of the decorative raw paper 4, the polyester resin 6 is covered with a synthetic resin sheet to be solidified. After the synthetic resin sheet is peeled, the formed polyester decorative panel is perfectly cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a polyester decorative board used for various furnitures, building interior materials and the like.

[0002]

2. Description of the Related Art As a conventional method for manufacturing a decorative board of this type, a printed decorative base paper such as titanium paper on which a pattern layer such as wood grain is formed is laminated on a substrate such as plywood by an adhesive through a press. Further, the unsaturated polyester resin is applied to the entire upper surface of the printed decorative base paper having the above-mentioned pattern layer, and then the resin is cured by allowing to stand under heating to produce a decorative board. But,
Unsaturated polyester resins have the drawback that the curing reaction is hindered by oxygen in the air, so even if the interior is exposed to air, the surface may come in contact with air, but the curing may be delayed and the tackiness may remain for a long time, or the surface hardness may increase. Is insufficient, the surface is whitened when exposed to water, adhesiveness is caused by heat, and the resistance to chemicals and organic solvents is greatly reduced.

Conventionally, in order to solve such a drawback, a method of adding a wax to an unsaturated polyester resin or a physical method of covering a surface of a cured product with a synthetic resin sheet so as not to come into contact with air during curing has been proposed. Has been adopted. However, since the wax remains on the surface of the molded product in the former method, it is necessary to perform processing such as buffing and sanding, and it is also necessary to adjust the amount of wax added and the type of wax depending on the conditions of use. There is a drawback that it takes time. In the latter method, the synthetic resin sheet on the surface cannot be peeled off until the unsaturated polyester resin is cured. Therefore, it takes time to peel off the synthetic resin sheet. It is necessary to prepare a large amount of the body, and in terms of equipment space, a large space is required, so production efficiency is poor, and there is also a method of curing in a heated state to shorten the curing time, but in this case However, there is a problem that heating equipment is required and the water content of the wooden substrate decreases due to the heating, so that the decorative board is warped.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a polyester decorative board produced using an unsaturated polyester resin, The present invention provides a method for efficiently manufacturing with a small equipment space.

[0005]

In order to achieve the above-mentioned object, a method for producing a polyester decorative board of the present invention comprises applying an adhesive on a decorative board substrate, and applying a pattern layer on the adhesive. Laminated makeup base paper on which the picture layer is formed, the air-drying non-wax unsaturated polyester resin is applied on the upper surface of the picture layer, and then a synthetic resin film is formed.
In the process of laminating the sheet-shaped support so as to be in contact with the air-drying type non-wax unsaturated polyester resin and curing the same, the sheet-like support is formed when the surface of the air-drying type non-wax unsaturated polyester resin is solidified. The support is peeled off, and the polyester decorative plates from which the sheet-like support is peeled off are stacked and cured.

[0006]

In the above-mentioned method for producing a polyester decorative board of the present invention, since the air-drying type non-wax unsaturated polyester resin is used as the unsaturated polyester resin, the surface of the air-drying type unsaturated polyester resin is solidified. At this point, the sheet-shaped supports can be peeled off and the decorative plates can be piled up, so there is less equipment space and a small amount of sheet-shaped supports, making it easy to handle small-lot production.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a polyester decorative board of the present invention, and FIG. 2 is a schematic view showing a cross-section of a laminated structure of an embodiment of the polyester decorative board produced by the method of the present invention, wherein 1 is polyester A decorative board, 2 is a base material, 3 is an adhesive, 4 is a base paper for makeup, 5 is a pattern layer, 6 is an air-drying non-wax unsaturated polyester resin, and 7 is a synthetic resin film.

As the constitution of the polyester decorative board 1 of the present invention, as shown in FIG. 1, a decorative base paper 4 provided with a pattern layer 5 is laminated on an upper surface of a base material 2 with an adhesive 3 interposed therebetween.
An air-drying non-wax unsaturated polyester resin 6 is laminated on the entire surface of the base paper 4 for makeup.

The substrate 2 is made of wood, plywood, particle board, or the like in order to give the thickness and strength required for a decorative board.
Those such as MDF are used. The adhesive 3 used for adhering the substrate 2 and the cosmetic base paper 4 is a normal emulsion type adhesive such as urea resin, acrylic resin, vinyl acetate resin, etc., which is adhered using a hot press or a laminator device. To be done.

As the base paper 4 for makeup, it is preferable to use colored paper having a concealing property with respect to the substrate.
So-called titanium paper mixed with an opaque pigment such as titanium dioxide at 0 g / m ² or 20 to 50 g / m ² thin paper containing titanium for the purpose of concealing property is used, if desired. Is provided.

The pattern layer 5 is printed with an arbitrary pattern such as a wood grain pattern, an abstract pattern, a stone pattern, etc. As a method for forming the print layer, a usual printing method such as gravure printing, screen printing or offset printing is used. You can As the ink, it is preferable to use a cellulose acetate type or a cellulose acetate / nitrocellulose mixed type vehicle.

Next, the air-drying type non-wax unsaturated polyester resin 6 is applied onto the printing base paper 4 and impregnated,
It is formed by curing. When the unsaturated polyester resin liquid is applied and impregnated and then cured, a so-called non-wax type unsaturated polyester resin is applied, which has no effect of oxygen curing inhibition and can be surface-dried without using wax. Examples of the method include methods such as modification of the acid component in the unsaturated alkyd, modification of the glycol component in the unsaturated alkyd, modification of the monomer in the unsaturated alkyd, addition of a thermoplastic resin, and the like. This is due to the modification of the glycol component in the saturated alkyd. Unsaturated polyester resins, in which allyl ethers are used as a glycol component in combination with other glycols or used alone, exhibit extremely good air-curing properties, and are physically hard and wear resistant. Rich in heat resistance, weather resistance, and chemical resistance. A polymerization initiator and, if necessary, a polymerization accelerator are added to the resin liquid before use.

The polymerization initiator may be added in an amount of 0.5 to 3% by weight with respect to the resin, and a peroxide such as methyl ethyl ketone peroxide, benzoyl peroxide or hydroperoxide, or azobisisobutyronitrile may be added. The above-mentioned radical initiator is appropriately selected and used. Examples of the polymerization accelerator include cobalt compounds such as cobalt naphthenate, metal compounds such as vanadium compounds and manganese compounds, and amine compounds such as dimethylaniline, which are 0.1 to 2.0% by weight of the resin. It is preferable to add it. Further, a compound having a vinyl group such as a styrene monomer may be used for the purpose of crosslinking the resin and adjusting the viscosity, and may be added so as to account for 10 to 40% by weight of the resin liquid.

When the resin liquid is applied, impregnated and cured, the surface is covered with a synthetic resin film 7. This smoothes the surface after applying the resin liquid, facilitates roller application for making the coating film thickness uniform, and prevents foreign matter such as dust from adhering to the surface. The synthetic resin film 7 to be used may be any conventionally known synthetic resin film, for example, a polyester film such as polyethylene terephthalate or polybutylene terephthalate or a polyolefin film such as polyethylene or polypropylene, an ethylene / vinyl alcohol copolymer, polyvinyl chloride, A vinyl resin film such as vinylon, a silicone go film, or the like is used, and it is preferable that it has good releasability from an air-drying type non-wax unsaturated polyester resin cured product. The thickness of the synthetic resin film 7 is usually 25 to 10
Around 0 μm is often used. In addition, when the finish of the film surface is glossy and matte, and when the unevenness pattern is formed on the film surface, the cured unsaturated polyester resin surface is glossy, matte, and uneven pattern is formed. You can do it.

As a method for producing the polyester decorative board 1, as shown in FIG. 2, an adhesive 3 is applied on a substrate 2 and a base paper 4 for makeup is laminated on it by a press. Next, the air-drying non-wax unsaturated polyester resin 6 is applied to the surface of the base paper 4 for cosmetics, the synthetic resin film 7 is covered, and the surface is squeezed by a roller to deaerate the air and the surface is smoothed and then left for a while. Then, when the surface of the air-drying non-wax unsaturated polyester resin 6 is solidified, the synthetic resin film 7 is peeled off. The decorative plate from which the synthetic resin film 7 has been peeled off is removed from the production line and completely cured in a stacked state.

The time until the synthetic resin film 7 is peeled off is appropriately determined according to the type of the unsaturated polyester resin selected, the standing temperature and the like. Usually, in order to fully cure the resin and bring out the physical properties sufficiently, it is preferable to peel off the synthetic resin film 7 when the resin is sufficiently cured to the surface. For example, when using a normal unsaturated polyester resin, Generally, it is 15 to 20 minutes, but when an air-drying type non-wax unsaturated polyester resin is used, the surface of the synthetic resin film 7 is solidified in 7 to 8 minutes since the curing is sufficiently proceeded even in the presence of air. Can be peeled off

Example 1 A decorative base paper 4 was obtained by printing a wood grain pattern on a titanium paper having a basis weight of 80 g / m ² using an ink containing cellulose acetate as a vehicle with a conventional gravure printing machine. Then 2.5 mm
After the vinyl acetate adhesive 3 was roll-coated on the thick plywood 2, the decorative base paper 4 obtained above was laminated. The amount of adhesive applied at this time was 60 g / m ² . After that, on the surface of the decorative base paper 4 having the above-mentioned pattern layer 5, an air-drying type non-wax unsaturated polyester resin 6 containing 1.0% by weight of a curing catalyst (methyl ethyl ketone peroxide) 2 was applied.
It is applied at a rate of 30 g / m ² and is further transparent vinylon film 7
Then, after defoaming with a roller and smoothing it, and leaving it for 8 minutes at room temperature, the transparent vinylon film 7 was peeled off, removed from the conveyor line, and the transparent vinylon film 7 was peeled off. Overlapping veneer 24
After standing for a while, the polyester was completely cured to obtain a polyester decorative board.

[0018]

As described above, the present invention uses the air-drying type non-wax unsaturated polyester resin, and when the surface of the air-drying type non-wax unsaturated polyester resin is solidified, the surface of the synthetic resin film is solidified. As a result of adopting the peeling method, the in-line manufacturing time is shortened to 1/2, and the productivity is improved when a small lot is dealt with.

By using an air-drying type non-wax unsaturated polyester resin, and further covering the film on the surface and curing the resin, the surface of the decorative board is glossy, matte, or has a high design. A polyester decorative board can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a polyester decorative board of the present invention.

FIG. 2 is a schematic view showing a cross section of a laminated structure of one example of a polyester decorative board manufactured by the method of the present invention.

[Explanation of symbols]

 1 Polyester Decorative Board 2 Substrate 3 Adhesive 4 Decorative Base Paper 5 Picture Layer 6 Air Dry Non-Wax Unsaturated Polyester Resin 7 Synthetic Resin Film

Claims (1)

[Claims] 1. An adhesive agent is applied onto a decorative board substrate, and a decorative base paper having a picture layer formed thereon is laminated on the adhesive layer with the picture layer on top, and air is provided on the upper surface of the picture layer. In the process of applying a dry type non-wax unsaturated polyester resin, and then laminating a sheet-like support made of a synthetic resin film so as to be in contact with the air dry type non-wax unsaturated polyester resin, and curing the air, A polyester decorative board, characterized in that the sheet-like support is peeled off when the surface of the dry non-wax unsaturated polyester resin is solidified, and the polyester decorative boards from which the sheet-like support is peeled off are stacked and cured. Manufacturing method.