JP3456701B2 - Manufacturing method of synthetic resin pattern material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic resin pattern material containing a decorating material which is easily broken and pulverized by blending with a synthetic resin component.

[0002]

2. Description of the Related Art When a synthetic resin molded article is decorated, a speckled pattern is provided for the purpose of obtaining a texture of a stone pattern (JP-A-49-17831). Including these inventions, the following methods have been conventionally known for forming a spot pattern on a synthetic resin molded product. That is, a method of adding flakes (scales) obtained by cutting organic short fibers generally called piles, or a film of cellophane, polyester, vinylon, etc., a method of adding granular or flake-like inorganic substances, thermosetting A method of adding a pulverized product of a resin and a method of adding a colored polymer.

Of these, organic short fibers, flake-shaped organic substances, or granular or flake-shaped inorganic substances are superior as decorative materials because they are easily available and have a beautiful pattern, and are widely used. It is used. However, for example, among the above decorative materials, some of the inorganic materials such as short fiber or flake-shaped organic material having a large diameter of 100 to 300 denier, aluminum, glass, mica, etc. Blended with synthetic resin pellets,
After mixing with a mixer such as a tumble mixer, through a step of kneading with an extruder, it is crushed by being impacted when producing a masterbatch or a colored pellet of a patterning material, and the spot pattern becomes smaller or becomes finer. There is a problem in terms of design, such as a loss of clarity due to the decoration material, and a blurred texture.

More specifically, in the case of organic short fibers having a larger diameter, since fibers having a smaller diameter are simply bundled, a mechanical shock is exerted during the blending work with the pellet-shaped synthetic resin component. When it is received, it is disentangled, and it falls into a state in which only small spots can be formed. In the case of an organic substance processed into a flake form from a film, the film is cut by a mechanical impact from a pellet-shaped synthetic resin component during the blending work, and the film is also in a disjointed state. In addition, the inorganic granular or flake-shaped decorating material is destroyed by mechanical impact during blending with the pellet-shaped synthetic resin component and becomes fine powder, and the spots are small and the whole is blurred. In particular, granular or flake-like inorganic decorating materials having the purpose of imparting metallic luster or pearly luster, when the decorating material is crushed, the surface reflection that should originally occur is significantly reduced, resulting in a dull feeling. , Unable to reach the goal.

[0005]

DISCLOSURE OF THE INVENTION The present inventor diligently studied the above-mentioned problems relating to the decorative material, and as a result of repeating experiments, as a result, the decorative material and the synthetic resin which is a component of the synthetic resin pattern material are blended. The present invention has been completed based on the knowledge that the problem can be overcome by mitigating the impact of the blending work on the decorating material in the work. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for producing a synthetic resin pattern material containing a decorative material which is easily broken or pulverized by a blending operation while keeping its original shape.

[0006]

In order to solve the above-mentioned problems, the present invention includes a powdery thermoplastic resin and a pellet-shaped thermoplastic resin as synthetic resin components, and a decoration material and a powdery thermoplastic resin. or blending the thermoplastic resin, or first-Perret
Tsu shall adding decorative material itself and bets shaped thermoplastic resin and powdered thermoplastic resins blended, and overall heat weight ratio of the powdered thermoplastic resin occupying in plastic resin ratio 5 The measure is taken to be in the range of 100%.

As shown above, the decorating material is protected by being blended with the powdery thermoplastic resin by being blended with the powdery thermoplastic resin. On the other hand, first, when pelletized thermoplastic resin and powdered thermoplastic resin are blended, it is necessary to prepare pellets beforehand.
Since the thermoplastic resin in the shape of a worm is wrapped in the thermoplastic resin in the form of powder, mechanical impact is not directly applied to the decorating material. That is, in the blending work, the decoration material is wrapped with the powdery thermoplastic resin, or the powdery thermoplastic resin wraps the pellet-shaped thermoplastic resin, thereby preventing the decoration material from being broken by the pellets. Becomes

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As is apparent from the above, the method for producing a synthetic resin pattern material according to the present invention handles a decorative material which is easily broken or pulverized by the blending operation with the synthetic resin component.

The decorative materials applicable to the present invention are roughly classified into flake-shaped ones made by processing a film made of organic short fibers or organic substances generally called piles, and granular or flake-shaped ones made of an inorganic substance. To be done. In any case, the effect of the decorative material used in the present invention can be easily confirmed if the decorative material belongs to a relatively large shape.

When the decorating material is an organic short fiber, the fiber diameter is 1
It is desirable that the length is 100 decitex or more and the length is 0.1 to 3 mm. The base material of the short fiber can be selected from cotton, acetate, rayon, polyester, nylon and the like, and rayon is particularly preferable. As the organic flake-shaped decorating material, a film obtained by cutting a film of cellophane, polyester, vinylon or the like by a mechanical method is suitable, and the diameter is preferably 0.05 mm or more and 2 mm or less.

When the decorating material is inorganic and granular, aluminum, gold, brass, glass beads, etc. can be used, and the size is preferably 0.03 mm or more and 0.2 mm or less. In the case of inorganic flake-shaped decoration material,
Mica can be used in addition to aluminum, gold, brass, and glass, and the size is preferably 0.03 mm or more and 2 mm or less.

The decorating material used in the present invention is used as it is or without coloring, depending on the purpose.
When the resin product (molded product) has a light color tone, a colored decorative material is advantageous, and when the resin product (molded product) has a dark color tone, a non-colored decorative material is advantageous. Coloring of organic short fibers and flake-shaped decorating materials can be done by dyeing with dyes (post-dyeing) after processing into fibers or films, or by adding dyes and pigments when processing into fibers or films. Do (Moving).

The coloring of the inorganic granular or flake-like decorating material is carried out by a method of producing a decorating material by blending a coloring component such as glass beads, an organic material such as a dye or a pigment such as colored granules or colored flakes. It is carried out by a method of mixing the components and the resin component, coating and hardening, and a method of coating an inorganic vapor deposition film of aluminum, gold, silver, titanium or the like such as a pearlescent material and metallic luster.

The synthetic resin pattern material in the present invention is in the form of a masterbatch or a pattern material colored pellet. In the case of a masterbatch, the decorative material is mixed with a synthetic resin component prepared by blending the same or different powdery thermoplastic resin as the resin product (molded product), and in the case of a colored pellet, the decorative material and the resin are mixed. It can be produced by mixing a synthetic resin component formed by blending the same powdery thermoplastic resin as the product (molded product) and kneading with an extruder.

As described above, it is an essential condition to mix the powdery thermoplastic resin in the masterbatch of the synthetic resin pattern material or in the mixing of the pattern material colored pellet. When the thermoplastic resin in the form of powder is not blended and the thermoplastic resin in the form of pellets alone is used, the thermoplastic resin in the form of pellets is heavy and rigid, so that the decorating material is broken and pulverized during the blending operation. The fragility of the decorating material in the blending work depends on the blending ratio of the decorating material, the mechanical strength of the decorating material (fragility), the bulk specific gravity of the powdery thermoplastic resin, the type of blending machine, and the blending. Conditions (time, rotation speed)
It is greatly affected by. Therefore, it is difficult to uniquely determine the blending ratio (amount of powdered thermoplastic resin / amount of pelletized thermoplastic resin) in the powdery synthetic resin component used in the blending operation.

However, since a rough guideline for the mixing ratio can be grasped from the experimental results, the lower limit of the mixing ratio is the minimum amount of the powdery thermoplastic resin that can wrap the decoration material. Can be expressed as a value of several weight percent. On the other hand, the upper limit is 100% by weight of the powdered thermoplastic resin, but in reality, it is 10 due to a trade-off of the feeder screw.
A more desirable range that would rarely be 0 weight percent is considered to be 10 to 60 weight percent.

In the present invention, the pellet-shaped thermoplastic resin compounded in the decorating material is a resin used in injection molding and extrusion molding, and includes polyethylene, polypropylene, polystyrene, acrylonitrile / styrene copolymer, acrylonitrile / butadiene. Various resins such as / styrene copolymer, polymethylmethacrylate, polycarbonate, polyacetal, polybutylene terephthalate, polyethylene terephthalate, polyarylate, polyamide, polyphenylene ether, polyphenylene sulfide, polyether sulfone can be mentioned, depending on the purpose of use. You can choose arbitrarily. The powdery thermoplastic resin used in the present invention is a resin used for the above pelletized thermoplastic resin and is available as a powdery product.

In the production of the masterbatch of the synthetic resin pattern material or the pattern material colored pellet according to the present invention, a dye or a pigment may be added when coloring is required. The pigment is appropriately selected from inorganic pigments, organic pigments and the like. Specifically, monoazo, disazo, condensed azo, naphthol, anthraquinone, quinacridone, perylene, isoindolinone, phthalocyanine, dioxazine organic pigments and titanium oxide, titanium yellow, red iron oxide, Examples include inorganic pigments such as ultramarine blue, chromium oxide, molybdenum red, and carbon black.

In the present invention, an antioxidant, an ultraviolet absorber, an antistatic agent, a lubricant, a surfactant, a flame retardant, a foaming agent, etc. may be used according to the purpose of use, as long as the effects of the present invention are not impaired. Additives and fillers such as talc, mica, barium sulfate and calcium carbonate, and materials such as glass fiber, inorganic fiber and metal fiber can be added.

With respect to the present invention, the contents of the invention have been disclosed for the short fiber or granular or flake-shaped decorating material which is easily broken and pulverized in the blending work with the synthetic resin component. Does not exclude the production of a masterbatch or a resin compound in which microcapsules such as pesticides, medicines, functional dyes, inks, adhesives, etc., which are easily destroyed and pulverized, are compounded. Less than,
The present invention will be specifically exemplified. However, the contents of the present invention should not be limitedly interpreted by the following specific examples.

[0021]

[Examples] Example-1 Production of masterbatch containing aluminum (MB-1) Aluminum particles with a particle size of 0.03 mm (trade name: Alpaste J, fine particle type) manufactured by Toyo Aluminum Co., Ltd. as a decorating material 1
Powder polypropylene resin manufactured by Sumitomo Chemical Co., Ltd. (trade name: Sumitomo Noblene AZ-
630V4) 10 kg and pelletized polypropylene resin manufactured by Sumitomo Chemical Co., Ltd. (trade name: Sumitomo Noblene AZ-1).
61) A raw material of MB-1 containing aluminum using a mixture of 30 kg was put in a 100 kg tumble mixer, and stirred and mixed for 1 minute. The mixture was charged into the hopper of a 55 mm extruder, the cylinder temperature was kept at 200 ° C., and pelletization was performed to produce a master batch containing aluminum having a diameter of 2.5 mm and a length of 3 mm.

Comparative Example-1 Production of a masterbatch containing aluminum (MB-2) This was carried out except that 100% of polypropylene resin in pellet form was used in place of the mixture of powdered polypropylene resin and polypropylene resin in pellet form as the synthetic resin component. A master batch containing aluminum was manufactured under the same conditions as in Example-1.

Example 2 Production of colored pellets containing pile (CP-1) A pile having a fiber diameter of 170 decitex and a length of 0.5 mm (trade name: pile 150 denier black 0.5 mm) manufactured by Kyoto Pile Co., Ltd. as a decorating material. 0.4 kg of powder ABS resin (trade name: Ube Cycon ABS200N) manufactured by Ube Cycon Co., Ltd. as a synthetic resin component and pelleted ABS resin (trade name: Cebian ABS manufactured by Daicel Chemical Co., Ltd.)
660F) (30 kg), and 0.4 kg of titanium oxide was added to a 100 kg tumble mixer, and the mixture was stirred and mixed for 1 minute. The mixture was put into the hopper of a 55 mm extruder, the cylinder temperature was maintained at 230 ° C., and pelletization was performed to produce piled colored pellets having a diameter of 2.5 mm and a length of 3.3 mm.

Comparative Example-2 Production of Pile-containing Colored Pellet (CP-2) Powdered ABS resin as synthetic resin component and pelletized A
A piled colored pellet was prepared under the same conditions as in Example-2 except that 100% of ABS in pellet form was used instead of the mixture of BS resin.

Example 3 Production of Colored Pellet Containing Mica (CP-3) 0.6K of flake-shaped color mica (trade name: color mica 1M green) manufactured by Kawaguchi Sangyo Co., Ltd. having a particle size of 1 mm as a decorating material.
g as a synthetic resin component, a powder AS resin (trade name: Lightac-ALD-1) manufactured by Japan A & L Co., Ltd. 10K
g and 10 kg of pelletized AS resin (trade name: Stylak AB 767) manufactured by Asahi Kasei Kogyo Co., Ltd., and 0.4 kg of titanium oxide was added to a 100 kg tumble mixer and stirred for 1 minute to mix. Stirring,
After mixing, 20 kg of pellet-shaped AS resin (trade name: Stylak AB 767) was further added, followed by stirring and mixing for 30 seconds. The mixture was put into the hopper of a 55 mm extruder, the cylinder temperature was maintained at 230 ° C., and pelletization was performed to produce mica-containing colored pellets having a diameter of 2.5 mm and a length of 3.3 mm.

Comparative Example-3 Production of Colored Pellets Containing Mica (CP-4) Powder AS resin as synthetic resin component and AS in pellet form
Colored pellets containing mica were produced under the same conditions as in Example-3, except that 100% AS in pellet form was used instead of the resin mixture.

Example 4 Preparation of Injection Plate / Evaluation of Appearance Using the master batch and the colored pellets produced in Examples 1 to 3 and Comparative Examples 1 to 3, an injection plate of 50 mm × 90 mm × thickness 3 mm was prepared. It was created and the appearance of each injection plate was evaluated. The injection plate was molded using a 1 ounce injection molding machine manufactured by Yamashiro Seiki. The evaluation of the masterbatch was performed by using the masterbatch 1 manufactured in Example 1 and Comparative Example 1.
Parts to 10 parts of a pelletized polypropylene resin (trade name Sumitomo Noblen AZ-161) manufactured by Sumitomo Chemical Co., Ltd., mixed, then put into an injection molding machine, and injected.
This was done by molding the plate. Table 1 shows the evaluation results.

[Table 1] As can be understood from Table 1, in Example 1 (MB-1), Example 2 (CP-1), and Example 3 (CP-3), clear spot patterns were obtained. It can be seen that the decorative material according to the present invention maintains the original shape and exhibits the intended effect. On the other hand, Comparative Example 1 (MB-2), Comparative Example 2
It can be seen that in (CP-2) and Comparative Example 3 (CP-4), a clear spot pattern cannot be obtained, or even if the spot pattern is obtained, it is so small that the desired effect cannot be exhibited.

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Claims (3)

(57) [Claims] 1. A method for producing a synthetic resin pattern material containing a decorating material, which is easily broken or pulverized by blending with a synthetic resin component, wherein a powdery thermoplastic resin and pellets are used as the synthetic resin component. Kakazarizai of viewing contains a thermoplastic resin, to be blended and a decorative material and powdery thermoplastic resin, or by first blending the pellets of the thermoplastic resin and the powdered thermoplastic resin itself in particular the addition of
Wrap the decoration material with powdered thermoplastic resin,
Alternatively, the powdered thermoplastic resin may be pelletized thermoplastic resin.
A method for producing a synthetic resin pattern material, characterized in that it encloses fat and the ratio of the powdery thermoplastic resin to the total thermoplastic resin is in the range of 5 to 100% by weight. 2. The method for producing a synthetic resin pattern material according to claim 1, wherein the decorating material which is easily broken or pulverized by the blending operation is an organic material and has a form of short fibers or flakes of 100 decitex or more. . 3. The method for producing a synthetic resin pattern material according to claim 1, wherein the decorating material that is easily broken or pulverized by the blending operation is an inorganic material and has a powdery or flake-like form.