JP3424118B2 - Bright molding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a synthetic resin portion for electric appliances, cosmetics, daily necessities, etc., with a pearly or metallic luster that is used as a product body or its parts, or as a decoration. And a glittering molded article having the same.

[0002]

2. Description of the Related Art In order to make the surface of a synthetic resin molded product pearly or metallic, a glittering material is produced by directly and uniformly mixing a synthetic resin material with a glittering material such as mica or aluminum and molding it by an injection molding method. Items are well known and are used in various fields such as main bodies and parts of home electric appliances, cosmetic containers and daily necessities.

In the conventional glittering molded article, the glittering material appears on the surface of the molded article and is poor in gloss and depth of gloss, and
At the time of molding, the glittering material was unevenly distributed along the flow direction of the molten resin, so that the pearls and metallic effects that appeared were not interesting, and they were flat and lacked in glittering and high-grade feeling.

Further, flow marks and weld lines are formed around the bosses and holes along the flow direction of the molten resin. However, when the glitter material is mixed in the synthetic resin material, the flow marks and weld lines are formed along the flow direction of the molten resin. Since the glittering material changes its direction around the boss and the hole, the flow mark and weld line of the molded product appear emphasized and the appearance of the molded product is significantly impaired.

Therefore, the product value and appeal could not be enhanced even when the product is used in a portion of electric products or daily necessities products where glittering decorative properties are required or in a cosmetic container where aesthetics are important.

Further, as an attempt to enhance the pearl effect, Japanese Patent Laid-Open No. 56-57406 discloses a body formed of a transparent synthetic resin in which a small amount of pearl essence (brightening material) is uniformly mixed. There is disclosed a pearl decoration body having an opaque coating applied to the back surface with an opaque paint.

[0007]

Since the main body of the transparent synthetic resin has a certain thickness in this decorative body, the pearl essence scattered causes a deep pearl feeling.
However, since the pearl essence is in a small amount, it has a drawback that it is poor in dense glitter and metallic feeling. Further, when a large amount of pearl essence is mixed, the reflected light due to the pearl essence cannot be visually recognized effectively, and the gloss becomes a flat one with no depth like the conventional glittering molded article. It can't be effective.

Further, the present invention requires a step of applying an opaque coating on the back surface of the transparent body, and a flat glittering molded article which is easy to coat like a plate has no problem in productivity, The production cost is high and it cannot be said to be an economically suitable means for producing a glittering molded article having unevenness, which is difficult to perform the painting work.

The present invention has been made in view of the above problems, and is excellent in deep glitter and metallic feeling suitable for products such as electric appliances and cosmetics for which glittering aesthetics are required and parts thereof. An object of the present invention is to provide a glittering molded product made of a synthetic resin with good productivity.

[0010]

According to the present invention, a synthetic resin material containing a glitter material is used to form a glitter layer having an uneven surface by an injection molding method, and the glitter layer has a surface coated with the uneven surface. A smooth transparent resin layer for forming the glitter layer
It is characterized in that it is formed integrally with the glitter layer by injection performed separately from the injection, by the change in the flow of the molten resin due to unevenness during molding of the glitter layer, the glitter material is formed in a random orientation, The bright layer diffusely reflects light in multiple directions. The synergistic effect of the diffused reflection of the glittering material and the diffused reflection of the uneven surface of the glittering layer enhances the brightness of the light, and the transparent layer provides a glittering molded article having a deep and unique glittering feeling.

Further, a bright layer in which a letter having a concave and convex surface and having a rounded periphery, a convex surface forming a pattern or a pattern are engraved higher than the concave and convex surface is mixed with a bright material.
It is formed by an injection molding method using a resin material, a decorative layer is formed on the convex surface by transfer or printing, and the bright layer and
The transparent resin layer having a smooth surface that covers the decorative layer is
By integrally forming in the glitter layer, a glittering molded article in which a three-dimensional character, pattern, or pattern is lifted up from the uneven surface to be viewed can be obtained.

It is also possible to mix organic and inorganic particles in the transparent resin layer to complexly refract the light of the transparent resin layer to form a glittering molded article having a modulated visual glitter surface.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The glittering molded article of the present invention, as schematically shown in FIG. 1, has a glittering layer 3 having an uneven surface 2 formed by an injection molding method using a synthetic resin material mixed with a glittering material 1.
Is a two-layer synthetic resin molded product integrally formed with a transparent resin layer 4 having a smooth surface for covering the uneven surface 2, and is used in various fields such as home appliances and cosmetics, where glitter decoration is required. It is used for various parts of the product. Then, in order to form a two-layer integrally molded product, it is molded by well-known insert molding by an injection molding method or molding means by two-color molding.

As the synthetic resin material forming the glitter layer 3, polystyrene, acrylonitrile butadiene styrene, acrylonitrile styrene, polyethylene terephthalate, polycarbonate, polymethylmethacrylate, polypropylene, polyethylene, etc. are used, and the glitter material is mixed. Aluminum-based or mica-based materials are used, and aluminum-based glittering materials are preferable. Then, as the synthetic resin material, a material appropriately colored in a desired color is used.

The uneven surface 2 of the glitter layer 3 is formed by a mold. When the above molten synthetic resin is injected into a mold having irregularities to form the glitter layer 3, the irregularity in the mold causes turbulent flow of the molten resin forming the irregular surface 2, and the change in the flow causes the glitter material to change. 1 are formed by being arranged in random directions.

Therefore, the incident light on the glitter layer 3 is diffusely reflected by the glitter material 1 in random directions in multiple directions, and due to the synergistic effect of the irregular reflection by the uneven surface 2, a glitter surface having a varying brightness is obtained. Form.

Further, since the glittering materials 1 of the glittering layer 3 are arranged in random directions, when bosses or holes are provided in the glittering molded product (not shown), flow marks and weld lines appearing in the glittering layer 3 are Will be alleviated.

Further, the glitter layer 3 is formed by varying the height of the unevenness of the uneven surface 2 and the shape and size of the unevenness,
It is possible to diversify the light reflection pattern.

The transparent resin layer 4 transfers the above-mentioned glitter layer 3 to a mold for forming the transparent resin layer 4 and injects a molten transparent resin on the surface side of the glitter layer 3 so that the uneven surface 2 of the glitter layer 3 is formed. It is formed by covering the surface smoothly.

The thickness of the transparent resin layer 4, that is, the distance K between the convex vertex 2a of the uneven surface 2 and the smooth surface 4a of the transparent resin layer 4.
Is preferably at least 0.6 mm from the viewpoint of imparting depth to the glitter and the moldability of the transparent resin layer 4. Further, the transparent resin layer 4 may be a colored transparent layer that is slightly colored so as not to lose transparency.

Polystyrene, acrylonitrile styrene, polycarbonate, and polymethylmethacrylate having high transparency are suitable as the synthetic resin material forming the transparent resin layer 4, and are compatible with the synthetic resin material forming the bright layer 3. It is more preferable to select a synthetic resin material. Even if a synthetic resin material that is not compatible with the glitter layer 3 is selected, the glitter layer 3 and the transparent resin layer 4 can be held integrally by a bonding means such as undercut.

In the present embodiment configured as described above, the light brightness is high due to the synergistic effect of the diffuse reflection by the glitter material 1 and the diffuse reflection by the uneven surface 2 formed on the glitter layer 3, and the light has a predetermined thickness. With the transparent resin layer 4, a synthetic resin molded product having a deep and unique luster feeling can be obtained.

The injection-molding method by the well-known insert molding or two-color molding can be easily molded, so that it can be provided at a low cost, and since the surface of the glittering molded article is smooth, stains can be cleaned by wiping. Easy to do.

Therefore, many household appliances and hairdressing equipment,
It is suitable as a member that requires bright decoration for products that are often touched by hand, such as residential lighting equipment, personal information equipment, environmental equipment equipment, cosmetics and makeup containers, and has a new sensation. The decorative effect can enhance the appeal of these products.

FIG. 2 shows a second embodiment of the glittering molded article according to the present invention. In the figure, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and their description is omitted. Omit it.

As shown in the figure, this embodiment is basically the same as the previous embodiment, and an uneven surface 2 formed by an injection molding method using a synthetic resin material mixed with a glitter material 1. Is a two-layer synthetic resin molded product in which a transparent resin layer 4 having a smooth surface covering the uneven surface 2 is integrally formed on the glitter layer 3 having Then, on the uneven surface 2, a convex surface 6 forming a character, a pattern, or a pattern having a rounded edge 5 is engraved higher than the uneven surface 2, and the convex surface 6 is rounded by means of transfer or printing. The decorative layer 7 extending to the peripheral edge 5 of the transparent resin layer 4 is formed, and the convex surface 6 is located below the transparent resin layer 4.

According to the glittering molded article according to this embodiment, the letters, patterns, and patterns beautifully decorated with the transfer foil or the printing ink give a three-dimensional effect from the deep glittering uneven surface 2. It looks as if it is floating.

Therefore, the formed characters, designs, and patterns have an appealing power, and the product value can be increased by designing the convex surface 6 as a product name or a product pattern.

FIG. 3 shows a third embodiment of the glittering molded article according to the present invention, which is basically the same as the above-mentioned embodiment and has a fine heat-resistant plastic. A transparent granular material 8 such as beads and glass beads, which adds decorativeness, is uniformly mixed in the transparent resin layer 4.

According to the glittering molded product of this embodiment, the light passing through the transparent resin layer 4 is complicatedly refracted by the transparent granular material 8 to further amplify the irregular reflection of light.

Accordingly, a new visual bright surface is formed with a modulation different from that of the simple transparent resin layer 4, and a new appeal of the product can be created.

[0033]

EFFECTS OF THE INVENTION The glittering molded article of the present invention, which is embodied as described above, has the effects described below.

According to the glittering molded article according to claim 1,
Due to the synergistic effect of diffuse reflection by the randomly oriented glitter material and diffuse reflection by the uneven surface of the glitter layer, the brightness of the light is high, and the transparent layer having a smooth surface can produce a deep and unique glitter feeling. Further, since the glittering material of the glittering layer is arranged in random directions, even when the glittering molded product is provided with bosses or holes, the flow marks and weld lines appearing in the glittering layer can be made inconspicuous.

Therefore, the product made of such a glittering molded article has a higher appealing power than the product made of the conventional glittering molded article, and the commercial value can be increased.

Further, since it can be easily molded by a known injection molding method such as insert molding or two-color molding, the surface is smooth and the cleaning property is excellent, so that it has many parts that are easily touched by hand. It can be used for household and industrial products.

In the glittering molded article according to claim 2, in addition to the above effects, letters and patterns beautifully decorated on the convex surface,
Since the pattern is visualized as it rises from the deep glittering uneven surface with a three-dimensional effect, an appealing power peculiar to the characters, patterns, and patterns is added.

Therefore, by designing the convex surface as the product name or the pattern of the product, the product can be made more individual and more appealing.

In addition to the above effects, the glittering molded article according to claim 3 further amplifies diffused reflection of light to form a new visual glittering surface by modulation, so that a new sensation design is provided. Can be formed, and new appealing products can be developed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a glittering molded article according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the glittering molded article according to the present invention.

FIG. 3 is a sectional view showing a glittering molded article according to a third embodiment of the invention.

[Explanation of symbols]

1 bright material, 2 uneven surface, 3 bright layer, 4 transparent resin layer, 5 peripheral edge, 6 convex surface, 7 decorative layer, 8 granular material,

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takanori Nishiyama Inventor Takanori Nishiyama 1-280, Higashi Koikeku, Kokubunji, Tokyo (72) Inventor, Tetsuo Ishikawa 1-1-1, Higashitaga-cho, Hitachi, Ibaraki Hitachi, Ltd. Electric Appliances Division (72) Inventor Hiroaki Iwase 263-1-1104 Yamabukicho, Shinjuku-ku, Tokyo Inside C & J Co., Ltd. (72) Inventor Tomio Tahara 5-23-6 Asakusabashi, Taito-ku, Tokyo Kama (56) Reference JP-A-7-32548 (JP, A) JP-A-61-219643 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 1/00-35/00 B29C 45/00-45/84

Claims (3)

(57) [Claims] [Claim 1] with a synthetic resin material mixed with glittering material to form a shiny layer having an irregular surface by an injection molding method, the bright and synovial transparent resin layer surface covering the concave-convex surface on the brilliant layer By injection separately from injection for layer formation
A glittering molded article formed integrally with the glitter layer . 2. A synthetic resin in which a glitter material is mixed with a glitter layer in which a letter having a concave and convex surface and having a rounded periphery, a convex surface forming a pattern or a pattern is engraved higher than the concave and convex surface.
The material is formed by an injection molding method, a decorative layer is formed on the convex surface by transfer or printing, and the glitter layer and the
The transparent resin layer with a smooth surface that covers the decorative layer
A glittering molded article characterized by being formed integrally with a layer . 3. The glittering molded article according to claim 1 or 2, wherein organic and inorganic particles are mixed in the transparent resin layer.