JPH0151337B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing artificial wood grain decorative veneer,
The objective is to obtain an artificial wood-grained veneer that visually closely resembles the grain pattern of natural wood.

Conventionally, in the manufacturing method of artificial wood grain decorative veneer,
When trying to reproduce a desired wood grain pattern on the surface of a decorative veneer, it is necessary to dye the raw material veneer to see if there is no wood grain pattern between a pair of complementary male and female templates of the desired shape, or to dye the raw material veneer so that it is hardly noticeable. , without dyeing, laminated and press-bonded using only colored or colorless adhesive to create a veneer laminated fritchi, and then the fritchi was peeled off so that the adhesive layer had a wood grain pattern. .

However, since the adhesive layer interposed between the raw material veneers is of a single color, it is possible to express a wood grain pattern in a color different from other wood grain colors in places of the wood grain pattern unique to natural woods such as teak and rosewood. Moreover, since the adhesive layers forming the wood grain pattern were all of the same thickness, the boundaries of the wood grain pattern were too clearly visible, giving it an unmistakable artificial feel.

Furthermore, it was not possible to express the subtle luster of the wood grain pattern characteristic of natural wood, and its appearance was inferior to that of natural wood.

Therefore, the present inventor investigated various methods for manufacturing artificial wood-grained decorative veneers that have an appearance extremely similar to natural wood, and finally completed the present invention.

That is, in the present invention, raw veneers are laminated and pressure-bonded between templates having a desired shape via an adhesive to form a veneer laminated frit, and then the frit is peeled off so that the adhesive layer has a wood grain pattern. In the method of manufacturing artificial wood grain decorative veneers, the thickness and color of the adhesive layer interposed between the raw material veneers are varied at arbitrary positions, and the adhesive layer at arbitrary positions has gloss. The present invention relates to a method for producing an artificially grained board, which comprises mixing.

The present invention will be explained in more detail below.

Fig. 1 is a schematic diagram of one embodiment of the raw material veneer used to manufacture laminated veneer fritsch, Fig. 2 is an enlarged cross-sectional view of the artificial wood grain decorative veneer according to the present invention, and Fig. 3 is the book. FIG. 1 shows a perspective view of an artificial wood grain decorative veneer according to the invention.

1 is raw material veneer, which is obtained by peeling wood such as lauan, agathis, or ramin, which has no or almost invisible grain pattern.

The thickness is approximately 0.5 mm to 2.0 mm, and it can be colored in any desired color by dyeing. 2
In the adhesive layer, a pigment or dye having a desired color is added to a commonly used cold-curing or thermosetting wood adhesive such as urea resin, amino resin, or urethane resin.

The first feature of the present invention is that a pigment or dye having a desired color is added to the adhesive.

For example, teak has black grain patterns in some places, so if you want to manufacture something similar to this, you can add black pigments or dyes in the adhesive to the required places on the raw material veneer 1 to be laminated. Insert a veneer coated with adhesive mixed with

Of course, if the wood grain pattern is more complex, you can insert an appropriate combination of raw material veneers coated with three or four types of adhesive in different colors on the adhesive layer at any position in the raw material veneers to be laminated. It's okay.

The amount of these pigments and dyes added to the adhesive is determined to approximate the desired grain pattern color of natural wood, but in general, the adhesive (resin solid content is 25%
~55%) It may be within the range of 0.1 to 10% based on the weight.

Furthermore, in addition to the above matters, the present invention has a second feature:
By varying the thickness of the adhesive layer 2 interposed between the raw material veneers 1 as required, the width of the wood grain can be subtly changed.

As a method of varying the thickness of the adhesive layer 2,
This can be done by varying the number of times the adhesive is applied, or by adjusting the viscosity and viscosity of the adhesive to adjust the amount remaining as an adhesive layer between the raw material veneers.

An example of how to combine raw material veneers 1 with adhesive layers 2 of different thicknesses is as follows: coating amount: 70g/
Laminate one thin veneer with a coating weight of 150 g/m ² for every three raw veneers of m ² . Of course, raw material veneers with different coating amounts may be combined regularly as described above, but they may also be combined irregularly.

Furthermore, if you want to create a wood grain pattern that is more complex, you can use three raw material veneers 1 with different thicknesses of the adhesive layer 2.
Four types may be prepared and these may be combined as required.

The third feature of the present invention is that a glossy substance 3 is added to the adhesive layer 2 to express the gloss unique to natural precious wood.
At this time, the glossy substance 3 added to the adhesive
Gold powder, silver powder, copper powder, pearl powder, mica, fish phosphorus,
Refers to powders such as aluminum powder and glass powder. These glossy substance 3 adhesives (resin solid content
25-55%) is preferably approximately 10% by weight to 100% by weight, but is not particularly limited to this range.

Note that it is not necessary to add the glossy substance 3 to all of the adhesive layer 2 interposed between each raw material veneer 1. For example, when 300 raw material veneers 1 are stacked and pressed together, only 100 of them are coated with an adhesive containing the glossy substance 3, and the remaining 200 are coated with an adhesive containing the glossy substance 3. These may be laminated in desired combinations using adhesives that are not used. Alternatively, several types of adhesives with different amounts of the glossy substance 3 added may be prepared, and the raw material veneers 1 coated with these may be combined and laminated as required, and furthermore, the above 300 raw material veneers 1 may be laminated. 100 of the sheets are coated with an adhesive mixed with pearl powder as the lustrous substance 3, and the remaining 200 sheets are coated with an adhesive mixed with gold powder, and these are combined and laminated as required. good. In the present invention, as described above, the thickness and color of the adhesive layer 2 interposed between the raw material veneers 1
A frit is made by combining veneers in which a glossy substance 3 is mixed into a required adhesive layer 2 and bonding them together by pressing with a pair of complementary male and female templates 4.

The pressing conditions are 10 to 50 kg/cm ² pressure for 2 to 16 hours, and the number of laminated raw material veneers 1 is usually 100 or more.
Approximately 1000 pieces.

The thickness of the veneer laminated fritchi, which has been laminated and pressure-bonded under the above conditions, is cut using a peeling machine such as a slicer or half rotary so that the adhesive layer 2 has a wood grain pattern.
By stripping to about 0.2 mm to 2.0 mm, the desired artificial wood grain decorative veneer 5 can be obtained.

As described above, in the present invention, since the color of the adhesive layer 2 is changed from that of other layers as required, it is possible to express a change in the wood grain pattern that closely resembles the appearance of natural wood, and the pigments and dyes in the adhesive can be applied to the surface of the veneer. It penetrates into minute depressions and pipe grooves, and the color of the adhesive layer changes from dark to light between raw veneers, and the difference between the adhesive layer and raw veneers changes. The boundaries are vague and the grain pattern resembles that of natural wood.

Furthermore, since the thickness of the adhesive layer 2 is different from other layers, it is possible to express complex and subtle changes in the width of the wood grain, and since the glossy substance 3 is mixed into the adhesive layer 2, it is possible to express natural The unique luster of wood appears in the wood grain pattern that corresponds to the autumn wood, and the luster varies depending on the viewing direction, creating a three-dimensional effect similar to that of natural precious wood.

In the present invention, the above-mentioned individual effects come together to exert a synergistic effect, and it is possible to obtain an artificial wood grain decorative veneer that closely resembles the appearance of natural precious wood, which has never been seen before.

Examples of the present invention will be described below.

Thickness 0.5mm created by rotary lace
Agathis veneer was dyed yellow-brown and coated with an adhesive of the following composition to prepare a veneer.

(a) Compounded urea resin (resin solids content 50%) 50 parts by weight Vinyl acetate resin emulsion (resin solids content 30%)
%) 20 parts by weight Pearl powder 25 parts by weight Pigment (yellow) 2 parts by weight Coating amount 75 g/m ² (one side) (b) Compounded urea resin (resin solid content 45%) 50 parts by weight Vinyl acetate resin emulsion (resin solid content) Type 30
%) 20 parts by weight of wheat flour 20 parts by weight of pigment (black) 2 parts by weight Application amount 100g/m ² (one side) (c) Compounded urea resin (resin solid content 50%) 40 parts by weight of vinyl acetate resin emulsion (resin solid content) minutes 30
%) 20 parts by weight of wheat flour 20 parts by weight Application amount 200g/m ² (one side) Next, the veneer coated with each of the above (a), (b), and (c) compound adhesives was coated with (a), (b), (a)・(c)・(a)・(b)・(a)・(c)・(a)・(
b)…
Assemble 300 pieces in sequence and stack them between a pair of concave and convex mold plates, applying a pressure of 25 kg/cm ² and a pressing time of 16 hours.
A veneer laminated frit was obtained by pressing under certain conditions. Thereafter, the laminated surface of the fritchi was adjusted so that the desired wood grain pattern appeared, and then it was peeled off using a slicer to obtain an artificial wood grain decorative veneer with a desired thickness of 0.3 mm and an appearance that closely resembles natural teak wood. .

[Brief explanation of drawings]

Fig. 1 is a structural diagram of one embodiment of the raw material veneer when manufacturing a laminated veneer fritsch, Fig. 2 is an enlarged explanatory diagram of the artificial wood grain decorative veneer according to the present invention, and Fig. 3 is an illustration of the structure of the artificial wood grain decorative veneer according to the present invention. A perspective view of such an artificial wood grain decorative veneer is shown. 1... Raw material veneer, 2... Adhesive layer, 3... Glossy substance, 4... Template, 5... Artificial wood grain decorative veneer.

Claims (1)

[Claims] 1 Raw veneers are laminated and pressure bonded between templates of a desired shape via an adhesive to form a laminated veneer frit, and then the frit is peeled off so that the adhesive layer has a wood grain pattern to create an artificial wood grain decoration. In the method of manufacturing boards, the thickness and color of the adhesive layer interposed between the raw material veneers are varied depending on the adhesive layer at any position, and a glossy substance is mixed into the adhesive layer at any position. A method for manufacturing an artificial wood grain decorative veneer characterized by: