JPS625804A - Manufacture of moire finishing surface-reinforced decorativematerial - 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 Object of the Invention (Field of Industrial Application) The present invention relates to a method for manufacturing decorative wood materials used for the interior and exterior of houses.

(Prior art) In general, there is a difference in color tone between soft tissue (wood tissue) and wood fibers in very limited tree species among South American hardwood, South American hardwood, and African hardwood, which are called tropical hardwood. In cases where the parenchyma cells are noticeably shaded or shaded, or where the parenchyma cells develop into a band-like or combined wing-like shape and have light and shade, they generally exhibit a tree-ring-like striped pattern. Typical examples include teak and rosewood. It is found in plants such as , Bubinga, etc., and is prized as a high-quality cosmetic material.

On the other hand, tropical woods such as capo, ole, abiton, and lauan have well-developed soft tissue, but the difference in tone and shading between the soft tissue and the wood fibers are unclear, making them difficult to heat. It has almost no use as a high-grade decorative surface material, and is often used as a light and heavy structural material for building materials. In addition, even when these tropical materials are used as flooring materials, wall materials, ceiling materials, interior materials such as fittings, decorative materials for furniture and cabinets, it is necessary to use enamel painting that does not remove any fabric, or coloring or dyeing the base material. However, in any case, no method has yet been found to emphasize the wood grain of these wood species and obtain a beautiful appearance.

The reason for this is that in areas that produce tropical wood, there are no four seasons, no spring wood and summer wood are formed, and there are no tree rings or growth rings. For this reason, compared to inland materials, flooring materials, and northern ocean materials, it is far inferior in beauty, color tone, and density, and its value as a decorative material is extremely low.

On the other hand, when oil finishing, which is used for finishing teak, etc., is applied to these tropical woods such as Kapor, Avitone, and Lauan, the heather effect can be obtained due to the difference in the permeability of the oil depending on the wood structure. However, drying oils such as linseed oil, cottonseed oil, tung oil, and soybean oil, which are the main components of oil, are difficult to work with due to slow drying, poor abrasiveness, poor chemical resistance, and easy discoloration. There are some drawbacks in terms of practicality. Furthermore, it has the disadvantage that it tends to absorb dust and dirt after drying and hardening, and is not easy to maintain.

(Problems to be Solved by the Invention) Therefore, the present invention aims at impregnating a synthetic resin liquid by using a tree species whose axial soft tissue has a specific arrangement pattern among tropical timbers with unclear grains. When treated, the difference in permeability between the axial soft tissue and the wood fibers is utilized to obtain a heathering effect, as well as improve dimensional stability, moisture absorption/water absorption resistance, surface hardness, durability/weather resistance, etc. The purpose of this invention is to obtain a method for producing a surface-reinforced decorative material with improved physical properties.

"Structure of the invention" (Means for solving problems) The manufacturing method according to the present invention will be explained below.

First, even if the grain is unclear, the axial soft tissue may be a reticular soft tissue, a stepped soft tissue, a band-like soft tissue, an initial soft tissue,
Decompression method is applied to solid wood of tropical hardwood, which is terminal soft tissue and associated wing-like soft tissue, or to plywood made by laminating and bonding veneers thereof with the fiber directions perpendicular to each other, or to LVL made by laminating and bonding the fiber directions parallel to each other. The synthetic resin liquid is impregnated by a method such as , vacuum pressurization method, or other commonly used impregnation method.

Next, the tropical hardwood impregnated with this synthetic resin liquid is cured. The curing method is not particularly limited, but from the viewpoint of workability and cost, heat curing using a dryer, hot press, etc. is preferable.

In addition, when using this tropical hardwood material as a decorative veneer, the decorative veneer may be impregnated and cured after being adhered to an appropriate base material such as plywood, LVL, particle board, or the like, or it may be impregnated and cured in advance. Alternatively, only the decorative veneer may be impregnated with a synthetic resin liquid, and then bonded to the base material under heat and pressure and simultaneously cured.

The synthetic resin liquid used here is a single substance or a composite of each resin usually used for impregnating water materials, such as styrene, methyl methacrylate, diallyl phthalate, polyester, melamine, and phenol.
Furthermore, there is no problem in adding penetration aids, plasticizers, and other additives.

In the thus obtained synthetic resin-impregnated and hardened tropical hardwood, even though the grain before treatment is unclear, the axial soft tissue that is the constituent structure of the wood is more permeable and diffusible to synthetic resin liquid than wood fibers. Because of this, the amount of injection into the axial soft tissue increases, and a so-called "wetting color" appears, causing a difference in color tone, with the axial soft tissue becoming darker and the wood fibers becoming lighter.
The soft tissue exhibits an annual ring pattern similar to the summer wood of temperate hardwoods, and appears as a striped pattern on straight-grained surfaces and as a heathered pattern on wood-grained surfaces. Here, the arrangement form of the axial soft tissue is particularly limited because even if the axial soft tissue exists and is darkened by the synthetic resin liquid, it cannot be seen with the naked eye if it is scattered in dots. This is because it is not emphasized as a heathered grain and requires a certain arrangement form.

Furthermore, this synthetic resin-impregnated and hardened tropical hardwood wood is
Because it is impregnated and hardened with a synthetic resin liquid, it has the effect of improving various physical properties such as dimensional stability, moisture absorption/water absorption resistance, surface hardness, durability, and weather resistance. In particular, when using untreated LVL, which is made by laminating and bonding solid wood or veneer with the fiber directions parallel, only one side expands and contracts because the moisture content on the surface and back side of the material differs depending on the usage conditions. However, when solid wood or LVL is impregnated and cured in one piece, there is no need to worry about warping because there will be no uneven moisture content.

Although this synthetic resin-impregnated hardened tropical hardwood material may be used as is, it is preferable to grind the surface and then apply an appropriate coating in order to protect the surface and improve the aesthetic appearance. In particular, if the synthetic resin liquid used is colorless and transparent or very light-colored, the color tone after curing will be a bright hue, so by applying a clear coating or color clear coating, the color of the tropical hardwood material used can be improved. Depending on the case, it is possible to finish it to look like a precious wood such as teak or rosewood. Alternatively, by adding a coloring agent to the synthetic resin liquid used, it is possible to adjust the color to have any hue.

In this way, the heathered surface-reinforced decorative material obtained by the present invention not only has high design properties when used as interior materials such as flooring materials, wall materials, ceiling materials, fittings, and decorative materials for furniture and cabinets. It can be applied to the interior of shipping containers, exterior materials, flooring materials for shoes on feet, etc.

(Example) 5-ply LVL material of lauan rotary lace single plate (thickness 12-5fflfX@150jffX length 200011
1B) was impregnated with a synthetic resin liquid containing unsaturated polyester resin (100 parts), styrene (10 parts), and benzoyl peroxide (2 parts) under a reduced pressure of 10 [Hg] for 3 hours. After thoroughly draining the resin-impregnated LVL material thus obtained, it was heated at 100°C for 1 hour to completely cure the resin. The amount of resin impregnated at this time was 25 to 30%.

Furthermore, after surface polishing, undercoat, and intermediate polishing, a teak color topcoat was applied. As a result, a teak-colored, precious wood-like, heathered, surface-reinforced LVL material was obtained.

"Effects of the Invention" As explained above, the present invention provides the following effects when impregnated with a synthetic resin liquid on tropical hardwood, which originally had unclear grains and low cosmetic value, and had a limited field of use. By utilizing the difference in permeability due to the wood structure, it is possible to obtain a heathered grain effect that resembles a precious wood, which gives it a high design quality, and improves various physical properties by impregnating and hardening the synthetic resin liquid. This has the effect that

Claims (5)

[Claims] (1) In synthetic resin-impregnated wood obtained by impregnating and curing a synthetic resin liquid, among tropical hardwoods having an axial soft tissue, the axial soft tissue is a reticular soft tissue or a stepped soft tissue. A surface-strengthening cosmetic with heathered grains characterized by obtaining synthetic resin-impregnated wood with emphasized heather grains by using wood species of , band-like soft tissue, initial soft tissue, terminal soft tissue, and combined wing-like soft tissue as materials. Method of manufacturing wood. (2) A method for manufacturing a heathered surface-reinforced decorative material according to claim 1, which comprises curing tropical hardwood impregnated with a synthetic resin liquid and then adhering it to a wood base material. . (3) A heathered surface-reinforced decorative material according to claim 1, characterized in that an uncured tropical hardwood material impregnated with a synthetic resin liquid is cured at the same time as it is adhered to a wooden base material. manufacturing method. (4) A method for producing a decorative material with a heathered surface reinforcement as claimed in claim 1, which comprises adhering tropical hardwood to a wooden base material, and then impregnating and curing a synthetic resin solution. (5) A heathered surface-strengthening decorative material according to claim 1, characterized in that tropical hardwood veneers are laminated and bonded as plywood or LVL, and then impregnated with a synthetic resin liquid and cured. manufacturing method.