JPS6036921B2 - Manufacturing method of architectural decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for attaching a needle veneer to a wooden base material by using a predetermined resin adhesive with the addition of another adhesive. The present invention relates to a method of manufacturing an architectural board that provides concealment properties between the board and the wood base material.

Traditionally, decorative veneer boards for construction have been pasted onto wooden base materials such as plywood, LVL, particle board, and laminated wood, but because ordinary wood-based adhesives are used, surfaced salmon veneers, especially needle mulberry horizontal boards, have been used. 〇As the existing veneer becomes thinner, the adhesive behind the press becomes transparent, so the dark-colored base material surface becomes transparent through the exposed sheath veneer, resulting in an unsightly appearance. Also, recently WPC
When using synthetic resin-injected veneer, which is said to be a synthetic resin injected veneer, the permeability of the veneer increases significantly compared to untreated veneer, and if it is a thin veneer, it will be very difficult to use. It could not be used as such. In order to take advantage of the cosmetic properties of thin surface veneers, the problem of transparency was generally solved by using highly opaque pigments and appropriately coloring them with dyes, etc., or by using colored sheets. .

However, when using this method, the amount of pigment or dye added is usually small, and if this variation in the amount added causes subtle color differences or uneven concealment, or if the rope is insufficient, the amount of pigment or dye added may be small. The problem was that the dyes were not easily and uniformly dispersed, forming partial clumps that could be seen through in spots. Further, when using a colored sheet, there are problems such as high cost and workability such as double pasting. In order to eliminate these drawbacks, we have created a complete product that does not use pigments, dyes, colored sheets, etc.
As a result of examining various methods, we discovered that even if adhesives are transparent after pressing, they can hide when mixed with certain types of adhesives.

That is, in this invention, when a melamine resin adhesive or a melamine mulcher cocondensable resin adhesive is added to a Q-olefin adhesive, the adhesive is cured after pressing to form a white concealing layer.

Further, even if a vinyl acetate resin adhesive that imparts plasticity to the above formulation is added, the hiding property does not change. However, Q
-The effects of this invention cannot be obtained even if only a vinyl acetate resin adhesive is added to an olefin resin adhesive. The reason why these phenomena occur is not clear, but the Q-olefin resin adhesive used in this invention is a commonly used Q-olefin resin adhesive made of a copolymer of isobutene and maleic anhydride.
An olefin resin emulsion (commonly known as Kuratatsuku) may be used, and the melamine resin adhesive or melamine melamine co-condensed resin adhesive may be a general plywood or secondary adhesive adhesive made of melamine or melamine fused with formalin. do not have. These compounding ratios allow 100 parts of Q-olefin resin adhesive to be mixed with other adhesives from 2 parts to about 40 parts, and since the mixing ratio is large, it is possible to freely mix from the viewpoint of workability and cost. you can choose,
It's convenient. In this way, since the adhesives are simply mixed together, a constant color and a constant opacity can always be obtained, and there will be no difference in color or uneven opacity. It should be noted that there is no problem in adding any of the commonly used curing agents, some water resistance improvers, weather resistance improvers, fillers, thickeners, etc. to the adhesive composition of the present invention. The purpose of limiting decorative veneers to softwood is that compared to hardwood veneers, softwood veneers have significantly higher permeability when made thinner, and furthermore, synthetic resin-injected veneers have even greater permeability. Therefore, it is effective to apply the present invention to these veneers.

Furthermore, if the decorative veneer is bleached, colored, or bleached, it is possible to finish the decorative veneer with almost no difference in color. Next, embodiments of this invention will be described.

(Example 1) Kuratac N-514 (manufactured by Ohshika Shinko Co., Ltd.) as a Q-olefin resin adhesive; KB-01 as a 0-10 base hardening agent; and PWP-15 (manufactured by Ohshika Shinko Co., Ltd.) as a 5-part melamine resin adhesive.
0-40 Flour as base bulking agent
An adhesive prepared by adding 15 parts of adhesive was applied to the surface of the plywood base material at a rate of 1 inch/2 inches, and a 0.4-rib sliced veneer of Japanese pine was placed thereon and pressed for 2 minutes at 120 mm/cm.

(Comparative example 1) PWP-15
10 foundation flour
Using an adhesive containing 15 parts hardening agent (ammonium chloride), 0.5 parts, and 4 parts pigment (titanium oxide), the same veneer as in Example 1 was hot-press pressed onto a plywood substrate under the same conditions.

(Example 2) Polyester resin was injected into a 0.5-side Japanese pine veneer using a normal vacuum method to make a synthetic resin-injected veneer, and the veneer was bonded to a plywood base material at 135°C using the adhesive blended in Example 1.
It was hot pressed for 10 minutes on 8k9' material.

(Comparative Example 2) Kuratak N-514 10 parts hardening agent (KB-01) 5 parts wheat flour
15 parts titanium pigment
Using an adhesive containing 4 parts, the synthetic resin injected veneer of Example 2 was made into a plywood substrate135
Hot pressure pressing was carried out at 8k9°C for 10 minutes.

The results shown in Table 1 were obtained from the above experiments.

The method of the present invention has the same hiding effect without using pigments, and it is possible to obtain extremely natural-looking boards that suppress the influence of the dark color of the base plywood.

Table-1 Concealability comparison

Claims (1)

[Scope of Claims] 1. When adhering a softwood decorative veneer to a wood base material, a melamine resin adhesive or a melamine-urea cocondensation resin adhesive is added to an α-olefin resin adhesive as an adhesive. A method for manufacturing decorative laminates for architectural use. 2. A method for manufacturing decorative veneers for architectural features as set forth in claim 1, characterized in that a synthetic resin-injected decorative veneer is used, which is a decorative coniferous veneer injected with a synthetic resin liquid. 3. A method for manufacturing decorative architectural veneers according to claim 1 or 2, characterized in that a bleached, colored, or bleach-colored decorative coniferous veneer is used.