JPS6023001A - Manufacture of decorative veneer laminate sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a decorative veneer laminate sheet.

Decorative veneer is a thin plate with a thickness of 0.5 mm or less, which has a decorative surface and is used for various purposes.Today, it is an indispensable material in order to attract the attention of consumers in products made of board materials. It has become a thing.

Recently, decorative veneer laminate sheets (hereinafter referred to as sheets) have been proposed in which decorative veneers are arbitrarily combined and laminated to give various design patterns. Since the appearance characteristics are important in 1, when adhering decorative veneers to each other, or adhering decorative veneers to backing materials, etc., it is important to keep the contact agent in place so that it does not have a negative effect. Must be. Therefore, in the past, care has been taken to prevent the adhesive from seeping onto the surface of the decorative veneer, or so-called "staining".

In other words, for conventional decorative cleaning and temporary bonding, at least an adhesive that does not transfer to the surface of the decorative veneer is selected, or an additive that has an additive that prevents seepage is added to the adhesive. They adopted the method of using and doing.

However, according to the above conventional method, the following problems have occurred. In other words, when manufacturing a sheet by stacking a large number of decorative veneers, it is necessary to heat and pressure treat the adjacent decorative veneers each time to laminate them. There was a problem in that the number of heat-pressure treatment steps had to be correspondingly increased. Furthermore, when manufacturing a sheet that forms a pattern such as base stripes by combining two or more decorative veneers with different appearances, the decorative veneers are combined in advance to form the desired pattern. Since the adhesive can only be used after the adhesive has been applied, the entire decorative veneer of two or more types combined as described above is placed on the beaten material coated with the adhesive, and the decorative veneer is bonded together with the backing material. It is necessary to integrate the sheets by heat-pressure welding the entire sheet, and therefore, there is no adhesion between the decorative veneers that dry the sheet 1-, so the durability of the sheet is not very good. There was a problem.

In addition, since decorative veneers are thin as described above, they tend to dry out easily, causing external changes such as warping, twisting, cracking, cracking, or splitting. In order to prevent this drying, if the decorative veneer is allowed to absorb water and become damp, it will lead to contamination such as "stains", and therefore, it is not required as a decorative veneer in both dry and damp conditions. There is also the problem of not being able to provide the desired appearance.

Considering these circumstances, the present inventors conducted research on
(Even if a certain adhesive oozes out onto the surface of the decorative veneer as a result of soaking, it will not cause the appearance defects due to "glue seepage" as described above, and on the contrary, it will improve the appearance characteristics of the decorative JIL board. The present invention has been completed based on the discovery that the adhesiveness of the entire decorative veneer can also be strongly bonded.

That is, an object of the present invention is to provide a manufacturing method that allows a sheet to be obtained through an open process and in a good integrated state.

The feature of the present invention is that after applying a specific adhesive to the back of the decorative veneer, it is subjected to a first heat and pressure treatment, and then the decorative veneers treated in the same way are laminated to obtain a desired sheet. , a backing material was attached to the sheet and a second Atagawa treatment was performed.

The manufacturing method of the present invention will be explained in more detail below. In the present invention, either a wet decorative veneer with a moisture content of 20 or more or a dry decorative veneer with a moisture content of 20 or less can be used. First, adhesive is applied to the back side of the decorative veneer, and in this state it is subjected to relatively gentle heat and pressure treatment. The type of adhesive differs depending on the state, and in the former case, a film adhesive made of ionomer polyolefin-based tree I\1 is used,
In the latter case, the melamine resin should be added to the vinyl acetate resin by about 1'OmJ? t%~20! Water-soluble emulsion-like contact made by adding a large amount 75 nll
is used.

As the ionomer polyolefin-based citron fat adhesive, it is preferable to use a film-like one that satisfies either the melting point of 100° C. or lower or the softening point of 55° C. or lower. In addition, the film thickness is, for example, 02 m1 in thickness of the decorative veneer to be treated.
When it is +1, V( is preferably set to 20μ or less.

The amount of melamine resin added is IFJ car, t% to 20% by weight.
A range of is preferred.

Vinegar "A solution-like H4 adhesive made by blending a strong vinyl-based Tilt L1ir and a melamine resin is applied to the back side of the decorative veneer to be treated so that the film thickness (thickness of the decorative veneer is 0.2 (In case of swelling) It is best to apply it evenly so that the thickness is 20μ or less.

Heat-pressure treatment of decorative veneers coated with adhesive as described above,
That is, the temperature conditions in the first heat-pressure treatment are preferably in the range of 110°C to 120°C, and the pressure conditions are preferably in the range of 0.2/d to 0.5! /crJi range. The first heat-pressure treatment time is preferably in a range of 60 seconds to 60 seconds.

The decorative veneer obtained by heat-pressure treatment in this manner does not cause "stain" or the like during dry erosion, and can be stored stably for a long period of time.

Therefore, if such heat-pressure-treated decorative veneers are stored as they are, and when actually laminated, the desired decorative veneers are taken out at any time and the design pattern is applied to a pressure of about 8 kg/i or more. The surface of the decorative veneer was supposed to exhibit a so-called 1-tanme color, improving its appearance characteristics. This is due to the fact that the adhesive migrates within the decorative veneer and is impregnated throughout the decorative veneer.

Next, such decorative veneers are assembled into a design pattern, a backing material is adhered, and a heat pressure treatment is performed, that is, a second heat pressure treatment.
The temperature is in the range of 25°C to 150°C, and the pressure conditions are preferably in the range of 6 to 9/c, iA to 10 Kf/. The second heat-pressure treatment time is preferably in a range of 60 seconds to 90 seconds.

Hereinafter, the present invention will be explained based on the drawings.

As shown in Fig. 1, when a sheet is manufactured by laminating a large number of decorative veneers 1 (5 in the figure) together with a backing material 2, heat and pressure treatment is performed to integrate the sheets. The heat and pressure treatment process has been greatly simplified.

As shown in Fig. 2 and Fig. 6, when the sheet is manufactured by combining two types of decorative veneers with different appearances, the conventional method described above does not require the use of an adhesive. Adhesive can be present even in the areas where no adhesive was obtained, and therefore, the produced sheet is in an excellent integrated state. In particular, in the conventional method, the periphery of the decorative veneer on the side that is visible to the public is bent, and since the periphery is not bonded (during actual use), it may peel off and force may be applied. However, this drawback is also eliminated.

Furthermore, all of the manufactured sheets are wrapped in adhesive (this is due to the M-containing effect of the adhesive).

) Therefore, the initial state can be maintained regardless of changes in the outside air condition, leading to improved durability, and even when sanding before painting, the decorative veneer does not damage the sheet itself.

By the way, the makeup used to produce sheets! −
& refers to a strip-shaped body, and conventionally, in order to obtain this strip-shaped decorative veneer, both widthwise ends of a wider decorative veneer rough material were cut off uniformly. The strips are discarded as they are, but according to the present invention, the integrated state of the sheet can be improved.
ll long pieces can also be used as decorative veneers for forming sheets.

The adhesive may be used in a state where it is adhered to release paper or r)1 (mold film) as usual.

Furthermore, when manufacturing the sheet, the backing material may be reinforced or bonded at the same time.

According to the present invention, since the adhesive can be actively impregnated into the decorative veneer, all of the above-mentioned problems can be completely eliminated.

[Brief explanation of drawings]

Figure 1 is a cutaway diagram showing an example of the sheet; Figure 2 is a sectional view showing another example of the sheet, and FIG. 5 shows a flat Ij diagram showing another example. 1... Decorative veneer

Claims (5)

[Claims] (1) After applying an ionomer polyolefin resin adhesive or a water-based emulsion adhesive made by adding 10% to 20% by weight of a melamine resin to a vinyl acetate resin on the back side of the decorative veneer, a first heat-pressing treatment is performed. Then, the decorative veneers treated in this way are laminated to obtain a desired laminate sheet, a backing material is attached to the sheet, and a decorative veneer with a percentage of C is subjected to a second heat-pressure treatment. Method for manufacturing a board laminate sheet. (2) Claim 1 in which the first heat-pressure treatment is performed at a temperature of about 120° C. or less and a pressure of about 0.5 Kg/cm or less.
The method described in section. (3) The second heat-pressure treatment is performed at a temperature of about 125°C to 130°C;
2. The method of claim 1, wherein the method is carried out at a pressure of about 6 fm/cni to 10 fm/d. (4) Claim 1, wherein the decorative veneer has a moisture content of 20% or less, and the adhesive applied to the back surface of the decorative veneer is an ionomer polyolefin resin adhesive.
The method described in section. (5) The decorative veneer has a moisture content of 20% or more, and the adhesive applied to the back surface of the decorative veneer is made by adding 10 to 20 weight cfb of melamine resin to vinyl acetate resin. The method according to claim 1, which is an aqueous emulsion adhesive.