JPS63236571A - Vein pattern moldings - Google Patents

Abstract

PURPOSE:To obtain vein pattern moldings with fine profundity and superior wooden touch by applying wood coloring agent and coating agent to moldings consisting of a composition of styrene resins and pulverized vegetable fiber. CONSTITUTION:The 100 weight parts of styrene resin, a copolymer between styrene and other monomers which can be copolymerized and styrene resins containing rubber as styrene resins and 10-400 weight parts of crushed materials such as timber, bamboo, cereal husk and pulp as vegetable fibers are compounded. After addition of stabilizer, antioxidant, filler, etc., if necessary, the mixture is molded by extrusion molding technique. The moldings thus obtained are ground to the surfacial depth of about 0.005-2.0mm and then a wood coloring agent and/or a coating agent are applied to a color the moldings. Consequently, the moldings with superior qualitative look and vein feeling are available as suitable materials for furniture and architecture.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a decorated wood-like molded body suitable for furniture, crafts, architecture, light electrical appliances, vehicle interiors, and the like.

"Prior Art and Problems" Conventionally, wood-like molded objects have been made of thermoplastic resin, thermosetting resin, etc. with wood grain patterns printed directly on them, wood grain patterns transferred by hot stamping, and wood grain patterns printed in advance. There are molded products laminated with paper or plastic film, and molded products with a woodgrain pattern on the surface or painted. However, all of these methods have flat decorative patterns, which not only do not allow for the delicate wood grain patterns that wood inherently has, but also include the problem of lacking the warmth, softness, and texture of wood that is unique to wood. ing.

"Means for Solving the Problems" In view of the above circumstances, the present invention improves the above-mentioned drawbacks and provides a wood-like molded article that has a delicate deep taste, a warm taste, and a feeling of wood texture. .

That is, the present invention involves decorating a molded article obtained by molding a mixture consisting of 100 parts by weight of styrene resin and 10 to 400 parts by weight of vegetable fiber powder with a wood coloring agent and/or a paint agent. The content is a wood-like molded body.

The styrenic resin used in the present invention includes styrene resin, a copolymer of styrene and other copolymerizable polymers, and a rubber-containing styrenic resin. The monomer copolymerizable with styrene used in styrenic copolymer resin is α
- Substituted styrenes such as methylstyrene, vinyltoluene, dimethylstyrene, chlorostyrene; unsaturated nitrites such as acrylonitrile and methacrylonitrile; methyl methacrylate, ethyl methacrylate, butyl methacrylate,
Methacrylic acid esters such as octyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate,
Examples include acrylic acid esters such as octyl acrylate; methacrylic acid, acrylic acid, maleic anhydride, etc., and these may be used singly or in combination of two or more. The rubber-containing styrenic resin used in the present invention includes polybutadiene or 0 to 30% by weight of butadiene copolymer rubber containing 50% by weight or more of butadiene, and 100 to 30% by weight of the styrene resin.
Examples include resins containing 70% by weight.

These styrenic resins and rubber-containing styrenic resins are
You may use 1 type or in combination of 2 or more types.

The plant fibers used in the present invention include wood, bamboo, grain shells,
Powder such as fruit pulp, pulp, and other crushed materials containing plants. The average particle size is 2000 to 20 μm, preferably 700 to 60 μm. Average particle size is 20μ
If it is less than m, the effect will be small, and if it exceeds 2000 μm, the appearance of the molded product will be poor. These plant fiber powders may be treated with bleaching, defatting, coloring, etc., or may be treated with chemicals such as neutralizing agents, or may be treated with chemicals in advance, and may be one type or two or more types. You may use a mixture of different plant fiber powders.

The blending amount of the vegetable fiber powder in the formulation used in the present invention is 10 to 400 parts by weight based on 100 parts by weight of the styrene resin. If the amount of Ii textile fiber powder blended is less than 10 parts by weight, a molded article with a satisfactory wood texture cannot be obtained. On the other hand, the amount of vegetable fiber j5) is 4
If the amount exceeds 0.00 parts by weight, sufficient mechanical strength necessary to maintain the shape of the molded article cannot be obtained, and moldability becomes extremely difficult.

The compound used in the present invention includes a known stabilizer and a single oxidizing agent that are commonly used when molding styrene resin.
Antistatic agents, colorants, flame retardants, inorganic fillers, metal powders,
Modifiers and the like can be added as appropriate. Preferred inorganic fillers and metal powders include CaC01-MgCO3, BaC
Carbonates such as 0t; CaO, MgO1BaO18lzo
:+ - Oxide such as Ti0z, ZnO; Ca(01()
2, Mg (Oll)z, [la (Off)z, AI
Hydroxide such as (011)3; Cu5Oa, Mg5
Examples include sulfur W salts such as O, BaSO4; talc, clay, Miz J, +5'J, aluminum powder, lead book 51, stainless steel powder, iron powder, etc. The preferred blending amount is 100 parts by weight of styrene resin. 0 to 200 parts by weight. 200
If the thickness exceeds the heavy layer, not only the molding processability will decrease, but also the mechanical strength of the molded article will decrease, and the appearance will deteriorate. Further, preferred modifiers are M[3S resin, ABS resin, SBS resin, SBR, etc.

The molded article of the present invention can be produced by extrusion molding, injection molding,
These include pipes, sheets, films, irregularly shaped articles, molded articles, etc. that are molded by known methods used for molding thermoplastic resins, such as calendar molding, compression molding, stamping molding, and transfer molding. The molded body in the present invention has a surface portion with a depth of 0.05 to 2.5 mm. It is preferable to use a molded body ground by OB, preferably about 0.01 to 0.51. This is because coloring and paint properties are improved by grinding. In particular, the coloring agent easily penetrates into the molded product, improving the colorability, and the texture is also improved, making it easier to create a wood texture feeling. The molded body can be ground by known methods such as shot blasting, brush sanding, belt sanding, and disk sanding. When using a belt sander, the particle size of the abrasive is 30 to 400, preferably 60 to 240. In the present invention, it is preferable to use a molded article with a drawing pattern. This is because adding a shibori pattern improves the coloring and paint properties, and also improves the texture due to the unevenness, giving it a wood grain feel. It is particularly preferable to use a molded product whose surface has been ground as described above and then has a drawing pattern attached to it. This is because the coloring, paint properties, texture, and feel of wood grain are further improved. As a method for attaching the crests, there are methods such as pressing a crimped roll, crested plate, embossed mold, etc. onto the molded body, and a method of injecting the molding material into the crested mold. There are no restrictions on the material of the mold, and known materials such as metal, ceramic, resin, and other materials can be used.In the present invention, the term "wood coloring or decoration with paint" refers to the material used for wood. It means applying a coloring agent and/or a coating agent to a molded object.In the present invention, it is possible to use only a coloring agent or only a coating agent, but a combination of a coloring agent and a coating agent can accommodate various variations. It is more preferable because it can be done.

The wood coloring and coating agents used in the molded article of the present invention include sealants and sealers.The coloring agents used in the present invention include water-based colorants, oil-based colorants, and alcoholic youth coloring agents. All known colorants used for wood, such as , NCR stain, and pigment stain, can be used. Also,
As the sealant, all known sealants used for wood, such as water-based sealants, oil-based sealants, and synthetic resin fillers, can be used. Furthermore, all known paints and sealers used for wood such as nitrocellulose lacquer, aminoalkyd resin, polyester resin, polyurethane resin, acrylic resin, urea resin, polyvinyl chloride resin, and shellac varnish are used as paints and sealers. Can be used.

In the present invention, the wood coloring and coating agent are applied to the molded article by known methods such as spraying, brushing, dipping, and wiping. In addition, regarding wood colorants, Toppan Printing,
Coloring may be performed by a known method such as intaglio printing, screen printing, or pad printing.

If necessary, after applying the wood colorant and/or paint, remove any excess wood colorant or paint from the molded object with a brush.
It may be wiped off using a cloth or the like, or dry sanding, wet sanding, compound sanding, puff sanding, etc. may be performed depending on the purpose.

"Examples" Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited by these in any way.

Examples 1 to 4, Comparative Examples 1 to 5 77s1) Polystyrene resin 100 of 1.6 (30°C, toluene volume 7 nights, agricultural degree 0.1g/100m1)
The ffiFtt part was mixed with 0.5 parts of liquid paraffin and wood flour obtained by crushing coniferous trees (Subruce) with an average particle size of 100 μm according to Table 1, and the jacket temperature was 110°.
The mixture was placed in a ribbon blender (C) and mixed for 20 minutes.

This mixed material was put into a pressurized Nigu with a jacket temperature of 110°C, kneaded for 15 minutes, and then a mold temperature of 170°C.
, compression molded at a pressure of 50 kg/aJ for 15 minutes to a thickness of 5
A molded body with a flat surface of 150 mm in diameter and 150 fl in width was obtained.Next, the molded body was polished to 0.5 mm without grinding, or by using a belt sander with an abrasive cloth of No. 100 grain size on the top surface. After the depth grinding, the molded body was heated to 170° C., and the wood grain pattern was transferred onto the upper surface of the molded body using a compression molding machine whose upper die had a wood grain pattern.

These molded articles with wood grain patterns were subjected to a coloring test using a wood coloring agent and their texture when touched with bare skin was evaluated.

Coloring test (1) (oil-based coloring agent); After applying an oil-based wood coloring agent (oil stain mahogany color, manufactured by Nippon Paint 0ren) to the wood grain pattern surface of the molded object with a brush,
The excess coloring agent was gently wiped off with a rag, and the colorability was determined.

Coloring test (2) (water-based colorant): After applying a water-based wood colorant (Boarstin mahogany color, manufactured by Wasshin Chemical Industry 9@) to the wood grain pattern surface of the molded object with a brush, remove the excess colorant. The coloring property was determined by wiping it off with a cloth.

Colorability was evaluated according to the following criteria: ◎: Evenly colored on the entire surface △: Slightly colored ×: Hardly colored and texture evaluated; Oak wood polished with a sander with a grain size of No. 100 was used as a standard product. The texture of the molded product was evaluated by touching the woodgrain pattern surface with bare hands.

The texture was evaluated according to the following criteria: ◎ - Has almost the same wood texture as standard oak wood Δ: Slightly cold and inferior wood texture ×: Wood lacks warmth and soft feel From Table 1, which has no texture,
In Examples 1 to 4 of the present invention, both the water-based colorant and the oil-based colorant had good coloring properties, and the texture of the surface of the molded product was also good. In particular, Examples 2 and 4, in which the surface of the molded product was ground, had better coloring properties and texture, and were rich in wood texture.

On the other hand, Comparative Examples 1 to 4 had poor colorability and poor texture on the surface of the molded product. Comparative Example 5 had poor mechanical strength and could not maintain the shape of the molded article.

"Action/Effect" As mentioned above, according to the present invention, it is possible to provide a synthetic resin molded article that has good colorability and has a woody feel.

Patent applicant Kanebuchi Kagaku Kogyo Co., Ltd. Procedural amendment seal button November 17, 1988 Patent application No. 72155 of 1988 2 Title of invention Wood-like molded article 3 Person making the amendment Relationship to the case: Patent Applicant Address: 3-2-4 Nakanoshima, Kita-ku, Osaka Name (094)
) Kanebuchi Chemical Industry Co., Ltd. Representative Representative Director Niino
Makoto 4, agent address: 3-2-4 Nishitenma, Kita-ku, Osaka' o, o
Correct it to "os~".

Claims (1)

[Claims] 1. 100 parts by weight of styrene resin and 10 to 10 parts by weight of vegetable fiber powder
A wood-like molded product obtained by molding a mixture containing 400 parts by weight and decorating the molded product with a wood coloring agent and/or a paint agent. 2. The wood-like molded article according to claim 1, which uses a molded article whose surface portion is ground to a depth of 0.005 to 2.0 mm. 3. A wood-like molded article according to claim 1, which uses a molded article whose surface portion is ground to a depth of 0.005 to 2.0 mm and then has a drawing pattern. 4. A wood-like molded article according to claim 3, which uses a molded article with a drawing pattern such as wood grain, leather, or seam pattern.