JP2003113315A - Resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin molded article which exhibits a quite new design effect. SOLUTION: This resin molded article is formed by injection-molding as a raw material a polypropylene resin composition containing a pigment emitting an interference color with incident light and a coloring agent exhibiting fluorescent color with the incident light. The above-described pigment in the resin molded article exhibits a prescribed interference color, when irradiated with light. The coloring agent is also exited with the pigment-transmitted light to exhibit brilliant fluorescent color. Thereby, the resin molded article has a design effect quite different from conventional resin molded articles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product suitable for daily necessities, and more particularly to a resin molded product suitable for use in a hand such as a stationery such as a ballpoint pen and having a strong hobby element. Is.

[0002]

2. Description of the Related Art A stationery such as a ball-point pen shaft or a cap is often formed by injection molding using a thermoplastic resin such as polypropylene resin or polystyrene resin. From a practical point of view, resin molded articles such as stationery exhibit sufficient performance if they are injection-molded by adding the above-mentioned polypropylene resin with additives necessary for functions such as an antioxidant. However, since polypropylene resin is originally a milky white translucent resin and polystyrene resin is a colorless and transparent resin, a molded article obtained by injection molding of these resins as they are lacks in design fun.

Therefore, in particular, for resin molded articles such as stationery that are used by hand, in order to exert a design effect, pigments such as red and blue are blended to color the molded article in a specific color. Measures are taken. Alternatively, there is also a method in which resin pellets used for injection molding are mixed with different colors to expose a flow pattern or spot pattern on the surface of the molded product.
As another method, a method is known in which a metal powder such as aluminum is mixed with a resin to form a metallic-like molded product.

[0004]

As a measure for adding a design interest to a resin molded product, a method of coloring the molded product in one specific color as described above or forming a mottled pattern, or a metal such as aluminum. Only the method of mixing powder is adopted. Then, this invention aims at providing the resin molded product which can exhibit a completely new design effect.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the following technical means were taken.

[0006] The present invention is a resin molded product characterized by being formed by molding a resin composition containing a pigment exhibiting an interference color with respect to incident light and a colorant exhibiting a fluorescent color with respect to incident light. is there.

The resin molded product of the present invention contains a coloring agent exhibiting a fluorescent color. Furthermore, the resin molded product of the present invention contains a pigment exhibiting an interference color with respect to incident light. Therefore, the resin molded article of the present invention, the brightness of the interference light is outstanding,
The fluorescent color of the colorant is more distinct. The reason for this is
It is expected to be as follows. Usually, a coloring agent used for coloring a resin molded product reflects only a light wave having a specific wavelength in incident light and exhibits a color unique to the coloring agent. On the other hand, the colorant compounded in the resin molded product of the present invention reflects a light wave of a specific wavelength in the incident light, and most of the light waves of other wavelengths in the incident light have the same phase as the reflected light. Emitted as light of wavelength. Therefore, the colorant contained in the resin molded product of the present invention is excited by reflected light and exhibits a bright fluorescent color.

In the resin molded product of the present invention, a pigment exhibiting an interference color with respect to incident light is mixed, but the light interference is caused by reflection on both the surface and the inside of the pigment. . A pigment exhibiting an interference color is generally one in which a thin film 6 is provided on the surface of a base substance 5 as shown in FIG. A part of the light wave of the incident light is reflected by the surface of the pigment itself. Other incident light passes through the film on the surface of the pigment. The light that has passed through the coating on the surface of the pigment is reflected between the coating 6 and the basic substance 5 (first interlayer reflection). Then, the surface reflection and the first interlayer reflection interfere with each other to generate an interference color.

Further, part of the light also enters the inside of the basic substance 5 as shown in FIG. 1 and is reflected at the boundary between the back surface side of the basic material 5 and the film 6 on the back surface side (second interlayer reflection). ).
Further, light is reflected also on the back surface side of the film 6 (back surface reflection). The above-mentioned second interlayer reflection and back surface reflection also interfere with each other and emit interference light.

However, in reality, all of the incident light is the above-mentioned “surface of the pigment itself (surface reflection)”, “boundary between the film 6 and the basic substance 5 (first interlayer reflection)”, and “back side of the basic substance 5”. The light is not completely reflected by the boundary portion with the film 6 on the back surface side (second interlayer reflection) and the “back surface side of the film 6 (back surface reflection)”, and a large amount of light penetrates the pigment. Then, it collides with some substance in the resin to cause reflection (reflection inside the resin). However, the light reflected after passing through this pigment (reflection inside the resin) does not contribute to interference. Therefore, the reflected light in the resin obscures the interference light at a sharp angle, and the brightness of the interference light becomes dull.

On the other hand, according to the first aspect of the invention, the resin molded product contains a coloring agent that exhibits a fluorescent color with respect to incident light. Therefore, the light passing through the pigment is incident on the colorant contained in the resin molded product, the light wave of a specific wavelength is reflected, and most of the light waves of other wavelengths in the incident light are reflected. It is emitted as light of the same phase as the light. Therefore, in the present invention, the light that has passed through the pigment not only does not interfere with the interference of the reflected light on the pigment, but also excites the reflected light of the colorant to make the fluorescent color clearer. Therefore, the resin molded article of the present invention is one in which the brilliance of interference light stands out and exhibits a clear fluorescent color, and the design is clearly different from the conventional single-color resin molded article and the flow pattern resin molded article. The effect is obtained.

The resin molded product of the present invention may be formed by molding a resin composition containing a pigment that reflects incident light and a colorant that exhibits a fluorescent color with respect to the incident light ( Claim 2).

The above-mentioned resin-molded product has innumerable dot-like brilliance due to the pigment in the resin of clear fluorescent color, and is more brilliant than the conventional resin-molded product. A design effect that is clearly different from that obtained is obtained.

As the above-mentioned pigment, a glass flake pigment obtained by coating glass with a metal and / or a metal oxide can be used (claim 3).

It is also possible to use a metal-coated pigment having a resin film coated with a metal as the pigment (claim 4).

The pigment may be a metal-coated pigment obtained by coating an inorganic substance with a metal and / or a metal oxide (claim 5).

The pigment may be a metal-coated pigment obtained by coating an inorganic substance with a metal and / or a metal oxide and an organic pigment (claim 6).

Further, it is desirable that the coating thickness of the pigment is a thickness that produces an interference color (claim 7).

The pigment may be a metal powder that exhibits an interference color with respect to incident light. (Claim 8).

It is desirable that the above-mentioned pigment is capable of transmitting a part of light (claim 9).

The resin molded product may be semitransparent as a whole (claim 10).

The average particle size of the pigment is recommended to be 5.0 to 500 μm. Further, it is desirable that the pigment is contained in an amount of 1.0 to 5.0% by weight in the total amount of the resin composition (claim 11).

In the pigments such as the glass flake pigments and the metal-coated pigments described above, the particles have a flat shape and often have individual variations. Therefore, it is appropriate to use the average particle diameter or the median particle diameter to represent the particle size. The average particle size of the pigment contained in the resin molded product of the present invention is preferably 5.0 to 500 μm. When the average particle size of the pigment is less than 5.0 μm, the flake particles are too small and the glitter is poor. If the average particle size of the pigment exceeds 500 μm, the dispersibility in the resin will be poor.

As described above, it is preferable that the pigment is contained in an amount of 0.5 to 10.0% by weight based on the total amount of the resin composition used for the resin molded product. When the amount of the pigment is less than 0.5% by weight based on the total amount of the resin composition, the luster is not sufficient. When the amount of the pigment exceeds 10.0% by weight based on the total amount of the resin composition, the fluidity of the resin is poor and the moldability is reduced, and the entire resin molded product is filled with the pigment, which is exhibited by the combination of the pigment and the colorant. The design effect is diminished. Therefore, the optimum blending amount of the pigment is 1.0 to 5.0% by weight.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION In the resin molded product of the present invention, a pigment or metal powder that reflects incident light is mixed with a specific colorant. Glass flake pigments and metal-coated pigments are known as pigments that exhibit reflected light when light enters. The pigment and colorant will be described below. (Glass flake pigment) A glass flake pigment is a mirror-like object in which a metal or a metal oxide is coated on glass,
The pigment reflects incident light. Further, a glass flake pigment obtained by coating glass with a specific metal or metal oxide shines with a predetermined interference color. That is, the glass flake pigment used in the present invention is defined as a pigment having a brilliant sensation, which has a structure in which flaky glass is coated with a metal or a metal oxide. The resin molded product containing the glass flake pigment exhibits a unique design effect due to the interference color that is reflected by the pigment and is full of glitter.

The metal or metal oxide for coating the glass may be any one as long as it reflects incident light, but silver, nickel, titanium, chromium, molybdenum, brass, silver alloy, titanium oxide, etc. It is preferable that when it is coated on glass, it exhibits reflected light of a predetermined interference color with respect to incident light. Further, any method such as an electroless plating method or a sputtering method may be used for coating the glass with the metal or the metal oxide.

Among the above-mentioned glass flake pigments, those in which the metal coating the glass is silver or nickel have particularly high light reflectance and strong brilliance. Further, the pigment obtained by coating the glass with titanium exhibits a unique color with respect to incident light or interference color of rainbow due to light interference. Further, a pigment obtained by coating glass with titanium oxide exhibits a unique color or an iridescent interference color. Further, the reflected light emitted by the above-mentioned various pigments has a strong glittering feeling because the surface smoothness of the glass is high. Among glass flake pigments, glass coated with silver, nickel, titanium, or titanium oxide has a particularly high glittering feeling, and a resin molded product containing the glass flake pigment has a more unique design effect.

Among the glass flake pigments, there is one in which flake-shaped glass is coated with a metal by an electroless plating method. To give an example, silver-coated glass manufactured by Nippon Sheet Glass Co., Ltd. under the trade name "Metashine RCFSX" is used. -5480PS, Metashine RCFSX-5230PS, Metashine RCFSX-51
50PS "(above company code 9023 to 9025)," Metashine RCFSX -5090PS02 "," Metashine RCFSX "
-5090PS06 "and" Metashine RCFSX-5030PS "are available. Also made by Nippon Sheet Glass Co., Ltd., a glass flake pigment coated with nickel, trade name "Metashine RCFSX-5480NS or NB", "Metashine RCFS".
X-5230NS or NB '', `` Metashine RCFSX-5150
NS or the same NB "," Metashine RCFSX-5090NS or the same NB "," Metashine RCFSX-5030NS or the same NB "
(Company code 9041 to 9045 9050 to 9
054) can be adopted. Glass flake pigment further coated with titanium, trade name "Metashine RCFSX-509
0RC "(Company code 8052, 8053 8069-8
071) can be adopted. Further, as an example of a pigment in which flake glass is coated with titanium oxide, the trade name “Metashine RC9555 or 9548 or 9548” can be adopted.

Further, a glass flake pigment in which flake glass is coated with a metal by a sputtering method can also be used. For example, product names "Crystal Color GF2125", "Crystal Color GF2125-M", and "Crystal Color GF214" manufactured by Toyo Aluminum Co., Ltd., which are coated with silver.
0 "and" Crystal Color GF2140-M "are available. Also,
The product name "Crystal Color GF2525", which is coated with nickel, chromium and molybdenum, "Crystal Color"
GF2525-M "," Crystal Color GF2540 "and" Crystal Color GF2540-M "are available. In addition, there is a product name "GF250" manufactured by the company coated with brass, a product name "GF1345" manufactured by the company coated with silver alloy, and a product name "GF1445" manufactured by the company coated with titanium. Incidentally, those exemplified as the glass flake pigment whose surface is coated with a metal or a metal oxide in the above all have an interference effect, and shine in a peculiar color or a rainbow color in the resin molded product, but have a more interference effect. Pigments obtained by coating high glass with silver or titanium oxide are suitable as the pigment used in the present invention.

In the present invention, the average particle size of the glass flake pigment is preferably 5.0 to 500 μm. When the average particle size of the glass flake pigment is less than 5.0 μm, the flake particles are small and the glitter is poor, and when it exceeds 500 μm, the dispersibility in the resin is poor.

The glass flake pigment of the present invention is 0.5 to 20.% of the total amount of the resin composition used for molding a resin molded product.
It is preferably contained in an amount of 0% by weight. If the glass flake pigment is less than 0.5% by weight in the total amount of the resin composition, the glitter is not sufficient. When the glass flake pigment exceeds 20.0% by weight in the total amount of the resin composition forming the molded article,
The fluidity of the resin is poor and the moldability is reduced. The optimum blending amount of the glass flake pigment is 1.0 to 10.0% by weight.
In particular, when the transparency of the resin molded product is required, the optimum blending amount of the glass flake pigment becomes a lower value. In other words,
When the pigment exceeds 10.0% by weight in the total amount of the resin composition,
The entire area of the resin molded product is filled with the pigment, and the permeability is reduced. The optimum blending amount of the pigment is 1.0 to 5.0% by weight.

(Metal-Coated Pigment) The metal-coated pigment is a resin film or an inorganic substance coated with a metal and / or a metal oxide. The metal-coated pigment is a pigment that emits reflected light when light enters. In addition, a metal-coated pigment obtained by coating a resin film or an inorganic substance with a specific metal or metal oxide emits reflected light having high glitter and an interference color. Therefore, the resin molded product containing the pigment has a unique design effect full of glitter. The coating surface that covers the surface of the resin film or the inorganic substance may be a single layer or a multilayer of two or more layers. In the case where the coated surface is a multilayer, the reflected light is further emphasized because each coated surface exhibits reflected light. Also,
When the reflected light on the coated surface interferes, the interference color is further enhanced by forming the coated surface in multiple layers.

The resin film used for the metal-coated pigment is
Polyethylene resin, polypropylene resin, polystyrene resin, ABS resin, methacrylic resin, vinyl chloride resin, polyethylene terephthalate resin, polybutylene terephthalate resin, AS resin, EVA resin, cellulose acetate resin, polycarbonate resin, polyamide resin, polyacetal resin, modified polyphenylene oxide Any resin such as resin or polysanphone resin may be formed into a film shape. The metal coating the resin film may be any metal, but aluminum can be preferably used. The metal-coated pigment obtained by coating the resin film with aluminum exhibits reflected light having high brilliance with respect to incident light, and the resin molded product of the present invention containing the pigment has a unique design effect.

Mica is preferably used as the inorganic substance used in the metal-coated pigment. Titanium, titanium oxide, iron oxide and the like can be preferably used as the metal and / or metal oxide coating the inorganic substance. In particular, a metal-coated pigment obtained by coating mica with titanium oxide and iron oxide exhibits a peculiar color or an iridescent interference color due to interference of reflected light due to the coating surface formed of titanium oxide. Further, since the pigment has a coated surface composed of iron oxide, the interference color is further emphasized by the coated surface. Therefore, the resin-molded product of the present invention containing the pigment has an interference color emphasized and a glittering feeling.

As one type of metal-coated pigment, a pigment having a coating layer of a metal or metal oxide and a coating layer of an organic pigment is known.

A metal-coated pigment having a coating layer of a metal oxide or the like and a coating layer of an organic pigment produces reflected light having a high interference and a specific interference color on the coating surface composed of a metal and / or a metal oxide. Present. Further, the reflected light is further emphasized by the coating surface composed of the organic pigment. Therefore, the resin molded product of the present invention has a remarkable interference color and a bright feeling.

Mica is also suitable as the inorganic substance in the metal-coated pigment having a coating layer of a metal oxide or the like and a coating layer of an organic pigment. Further, in particular, a metal-coated pigment obtained by coating mica with titanium oxide and an organic pigment has a coating surface composed of titanium oxide that has a high brilliance and emits reflected light of a specific interference color, and a coating surface composed of an organic pigment , Further enhance the interference color of the reflected light. Therefore, the resin molded product of the present invention containing the above-mentioned pigment has a strikingly bright glittering interference color.

[0038] Of the metal-coated pigments, examples of inorganic pigments coated with metal and / or metal oxide by metal vapor deposition include aluminum coated with iron oxide (III), For example, product names "Paliocrom Gold L2000 / L2002" and "Paliocrom" manufactured by BASF Ltd.
Gold L2020 / L2022, Paliocrom Gold L2025, Pa
There is liocrom Gold L2800 ”. Further, mica coated with iron (III) oxide can be used. For example, trade names "Paliocrom Red Gold L2500" manufactured by BASF Ltd., "Pa
liocrom Red L4000 ”is available. Further, aluminum-manganese-coated mica-like iron oxide (III) can be used.
For example, the product name “Paliocrom Copper” manufactured by BASF Ltd.
There are "L3000" and "Paliocrom Copper L3001". Further, mica coated with reduced titanium dioxide can be used. For example, the product name "Paliocro" manufactured by BASF Ltd.
m Blue Silver L6000, Paliocrom BlueSilver L60
There is "01". Further, mica coated with titanium dioxide can also be used.

As the pigment contained in the resin molded product of the present invention, mica coated with reduced titanium dioxide can be used. For example, the product name "Pas manufactured by BASF Ltd.
liocrom Blue Silver L6000, Paliocrom Blue Sil
ver L6001 "is available. Also, a pigment whose mica is coated with titanium oxide and iron oxide, manufactured by Engelhard Co., Ltd. under the trade name "Santa Fe Desert Blush" (Company code 9
362Z), "Santa Fe Plum" (company code 9663)
Z), "Santa Fe KiwiGreen" (company code 986)
2Z), "Santa Fe Adobe Green" (Company code 98
63Z) can also be used. In addition, Engelhard's product name "Dynacolor BB" (Company code 96
39ZB15C), "Dynacolor GB" (Company code
Pigments in which titanium oxide and organic pigments are coated with mica, such as 9639ZG7C) and "Dynacolor RB" (Company code 9639ZV19A), can be preferably used as the pigment contained in the resin molded product of the present invention.

The average particle size of the above-mentioned metal-coated pigment is preferably 5.0 to 500 μm, like the glass flake pigment. When the average particle size is less than 5.0 μm, the above-mentioned inorganic pigment particles are too small and the glitter is poor, and the average particle size is 500 μm.
If it exceeds, the dispersibility in the resin will be poor.

Like the glass flake pigment, the amount of the metal-coated pigment is preferably 0.5 to 20.0% by weight based on the total amount of the resin composition for molding the resin molded article. 0.5% by weight of the above inorganic pigment in the total amount of the resin composition
If it is less than 1, the glittering property is not sufficient. When the above-mentioned inorganic pigment exceeds 20.0% by weight in the total amount of the resin composition, the fluidity of the resin is poor and the moldability is deteriorated. The optimum amount of the above metal-coated pigment is 1.0 to 10.0% by weight. In addition, when the resin molded product is required to have transparency, the optimum amount of the metal-coated pigment blended is a lower value. That is, when the pigment exceeds 10.0 wt% in the total amount of the resin composition, the entire area of the resin molded product is filled with the pigment, and the permeability is reduced. The optimum amount of the metal-coated pigment is 1.0 to 5.0% by weight.

(Metallic Powder) The metallic powder used as a pigment in the resin molded article of the present invention may be any metal powder as long as it exhibits reflected light with respect to incident light.
Specific examples include aluminum, silver, nickel, titanium, chromium, molybdenum, brass and silver alloys, and among these, aluminum can be most preferably used. In addition,
The metal powder may have any shape, but it is preferable that the metal powder is in a flake shape so as to increase the light reflection area. In addition, the surface of the metal powder is mirror-finished, and the metal powder colored with a dye or the like gives a stronger glittering feeling. As an example of the metal powder used in the present invention, silver of product number “H25” of product name “ELGY” series manufactured by Oike Kogyo, product number DG G
old, same part number Green, same part number Blue, same part number Red, same part number
Examples include Maroon and the same product number Black.

(Colorant) The colorant used in the resin molded product of the present invention exhibits a fluorescent color with respect to incident light. As an example, as a colorant that exhibits an orange hue when sunlight is incident light, there is a trade name “FX-304” manufactured by Shin Roihi Co., Ltd. Similarly, as a colorant exhibiting a yellow fluorescent color, there are a trade name “FX-305” manufactured by Shin Roihi Co., Ltd. and a trade name “Epocolor FP-3000H” manufactured by Nippon Shokubai. The pink fluorescent color is produced by the product name "FX-307" manufactured by Shin Roihi and the product name "Epocolor" manufactured by Nippon Shokubai.
FP-2050N "etc. can be adopted. In addition, as a coloring agent exhibiting a red fluorescent color, a trade name “FX-30” manufactured by Shin Loihi Co., Ltd.
3 ”etc.

As the resin forming the resin molded article of the present invention, any of thermoplastic resins capable of injection molding and extrusion molding can be used. Specifically, polyethylene resin, polypropylene resin, polystyrene resin, ABS resin, methacrylic resin, vinyl chloride resin, polyethylene terephthalate resin, polybutylene terephthalate resin, AS resin, EVA resin, cellulose acetate resin, polycarbonate resin, polyamide resin, polyacetal. Resins, modified polyphenylene oxide resins, polysanfon resins and the like can be mentioned.

(Other Additives) In the present invention, if necessary, in the resin composition to be molded, a weather resistance stabilizer, a heat resistance stabilizer, an antistatic agent, a foaming agent, a release agent, a lubricant, Nucleating agents, plasticizers, antioxidants, hydrochloric acid absorbents, antioxidants and the like can be added. Further, other pigments can be added.

[0046]

Example 1 Polypropylene (trade name MG03B manufactured by Nippon Polychem Co., Ltd.) was adopted as a resin, and 0.3% by weight of this resin was coated with silver-coated glass flake pigment (trade name Metashine RCFS5090PS02). Nippon Sheet Glass Co., Ltd.) and an orange fluorescent colorant (trade name “FX-304”) equivalent to 1.2% by weight of the whole.
(Manufactured by Shin-Roi Co., Ltd.) was mixed, measured, mixed with a blender, and further melt-kneaded with an extruder to form pellets. Then, this was further injection-molded to mold the cap 3 and the main body shaft 4 of the ball-point pen as shown in FIG. The main body shaft 4 of the ball-point pen is a member arranged outside the ink core 3 filled with ink, and is a member held by a user by hand during writing. The cap 3 and the main body shaft 4 of the molded ballpoint pen are specifically "Ballsign" (trade name) made by Sakura Crepas, and the top of the cap 3 is spherical.

The cap 3 and the main body shaft 4 have a fluorescent color of orange when viewed from the direction in which light is reflected,
Due to interference, it had innumerable minute, point-like brilliance. The orange fluorescent color of the cap 3 and the main body shaft 4 was brighter than that of the conventional resin molded product containing only the colorant (trade name “FX-304” manufactured by Shin Roihi Co., Ltd.). In addition, the cap 3 and the main body shaft 4 of the present embodiment are more prominent in the interference color than the conventional resin molded product in which the coloring agent that is orange and does not exhibit a fluorescent color and the silver-coated glass flake pigment are mixed. there were. Therefore, the resin molded product of the present example exhibited a bright fluorescent color due to the bright brilliance of the interference light.

(Example 2) In Example 1, the cap flake 4 and the body shaft 4 similar to those described above were injection-molded by changing the glass flake pigment and the colorant. The pigment used is a glass flake pigment coated with titanium oxide (trade name RC9555
Made by Nippon Sheet Glass Co., Ltd., titanium coating, average particle size of about 90μ
m). As the colorant, a product name "FX-305" manufactured by Shin Loihi Co., which exhibits a yellow fluorescent color, was adopted. In this example, when the cap 3 and the main body shaft 4 are viewed from the direction in which light is reflected, innumerable point-like brilliance is recognized, and the interference color is more prominent and brighter than the conventional resin molded product. It was
In addition, the resin molded product of this example had a brighter yellow fluorescent color than the conventional resin molded product.

(Example 3) As a pigment, glass flake pigment (trade name: Metashine RCFSX5090RC, product number 805
2 Titanium coating manufactured by Nippon Sheet Glass Co., Ltd. Average particle size of about 9
0 μm) was used as the colorant, and the trade name “FX-307” manufactured by Shin Loihi Co., which exhibits a pink fluorescent color, was adopted, and the cap 3 and the main body shaft 4 were injection-molded in the same manner as in the above example. In this example, when the cap 3 and the main body shaft 4 are viewed from the direction in which light is reflected, innumerable minute gold-colored spots are recognized, and the interference color is more prominent and brighter than the conventional resin molded product. It was a thing. In addition, the resin molded product of this example was more vivid in fluorescent color than the conventional resin molded product.

The difference in the brilliant color from that of Example 1 is because the coating thickness of titanium of the glass flake pigment is different. As described above, the present invention utilizes light interference. That is, by changing the thickness of titanium coated on the glass flakes, the wavelength enhanced by interference is different, which causes different hues to shine.

(Example 4) As a pigment, a product obtained by crushing an aluminum vapor deposition film "Olgae # 500" manufactured by Oike Kogyo Co., Ltd. was used, and as a coloring agent, a product name "FX manufactured by Sinlohi Co., Ltd." -303 "was adopted and the cap 3 and the main body shaft 4 were injection-molded in the same manner as in the above-mentioned embodiment. In the resin molded product of this example, compared with the conventional resin molded product, the reflected light due to the aluminum vapor deposition film was conspicuous, and the fluorescent color of the resin molded product body was clear.

(Example 5) Polypropylene (trade name MG03B manufactured by Nippon Polychem Co., Ltd.) was used as a resin, and a pigment (trade name) in which mica was coated with titanium oxide and iron oxide corresponding to 1% by weight of the whole resin Santa Fe
9863Z Engelhard, average particle size of about 17μm) and yellow fluorescent colorant (trade name "FP-3000H")
(Manufactured by Nippon Shokubai Co., Ltd.) was mixed, measured, mixed with a blender, and melt-kneaded with an extruder to form pellets.
Then, this was injection-molded to form the ball-point pen cap 3 and the main body shaft 4 as shown in FIG.

In the cap 3 and the main body shaft 4 of this embodiment, countless pigments in which mica is coated with titanium oxide and iron oxide are scattered. The pigment used in this example is a pigment whose interference color is green, and when it is irradiated with light, the reflected light interferes with it and emits a green light with a high brilliance. Further, the resin molded product of this example exhibited a clear fluorescent color as compared with the conventional resin molded product.

(Example 6) Polypropylene (trade name MG03B manufactured by Nippon Polychem Co., Ltd.) was adopted as a resin, and this resin was coated with titanium oxide and an organic pigment corresponding to 1% by weight of the whole pigment (trade name). Dynacolo
r BB Engelhard) and a colorant exhibiting a pink fluorescent color (trade name "FP-2050N" manufactured by Nippon Shokubai Co., Ltd.) were mixed, and a ballpoint pen as shown in FIG. The cap 3 and the main body shaft 4 were molded.

A pigment in which titanium oxide and an organic pigment are coated on mica is a blue pigment, and when irradiated with light, the reflected light interferes with each other and emits a glittering and highly glittering light. Therefore, the cap 3 and the main body shaft 4 of the present embodiment, in which the pigment is scattered innumerably, emits a point light having a high brilliance in the blue color when irradiated with light. Further, in the resin molded product of this example, the pink fluorescent color exhibited by the colorant itself was more distinct.

(Example 7) Furthermore, as a pigment, flaky aluminum (trade name "ELGY" manufactured by Oike Kogyo Co., Ltd.)
Part No. H25 Silver) and a colorant exhibiting a yellow fluorescent color (Nippon Shokubai's trade name "FP-300H") are blended, and the ball-point pen cap 3 as shown in FIG. The body shaft 4 was molded.

The cap 3 and the body shaft 4 of this embodiment are
Aluminum, which is a pigment, emits reflected light with a high brilliance. Further, the cap 3 and the main body shaft 4 are
A bright yellow fluorescent color is exhibited due to the incorporated coloring agent. Therefore, the resin molded product of this example had a completely different design effect from the conventional resin molded product.

[0058]

The resin molded product of the present invention is a resin molded product containing a pigment exhibiting reflected light with respect to incident light and a coloring agent exhibiting a fluorescent color with respect to incident light. Since the incident light that has been reflected and transmitted through the pigment further emphasizes the fluorescent color exhibited by the colorant, it has a unique design effect that has never existed before.

When the reflected light exhibited by the pigment compounded in the resin molded product of the present invention exhibits an interference color, the interference color exhibited by the pigment is conspicuous, and the incident light transmitted through the pigment is a coloring agent. Since it further emphasizes the fluorescent color exhibited by, it has an unprecedented unique design effect.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing how light is incident and reflected in the vicinity of a pigment contained in a resin molded product of the present invention.

FIG. 2 is a perspective view showing an example of a resin molded product of the present invention.

[Explanation of symbols]

1 Resin molded product 2 pigments 3 caps 4 body axis 5 Basic substances 6 film

Continued front page    F-term (reference) 4F071 AA20 AB07 AB09 AB18 AB28                       AD05 AE09 AH16 AH19 BA01                       BB05 BC07                 4J002 AB021 BB021 BB061 BB111                       BC021 BC061 BD031 BG051                       BN151 CB001 CF061 CF071                       CG001 CH071 CL001 CN031                       DA076 DA086 DA096 DA116                       DC006 DL006 FA016 FB076                       FB086 FD096 FD097 GC00

Claims (11)

[Claims] 1. A pigment exhibiting an interference color with respect to incident light,
A resin molded article, which is obtained by molding a resin composition containing a colorant that exhibits a fluorescent color with respect to incident light. 2. A resin molded product obtained by molding a resin composition containing a pigment that reflects incident light and a colorant that exhibits a fluorescent color with respect to the incident light. 3. The resin molded article according to claim 1 or 2, wherein the pigment is a glass flake pigment obtained by coating glass with a metal and / or a metal oxide. 4. The pigment according to claim 1, wherein the pigment is a metal-coated pigment obtained by coating a resin film with a metal.
The resin molded product described in. 5. The resin molded article according to claim 1 or 2, wherein the pigment is a metal-coated pigment obtained by coating an inorganic substance with a metal and / or a metal oxide. 6. The resin molded article according to claim 1, wherein the pigment is a metal-coated pigment obtained by coating an inorganic substance with a metal and / or a metal oxide, and an organic pigment. 7. The resin molded product according to claim 3, wherein the coating thickness of the pigment is a thickness that produces an interference color. 8. The resin molded product according to claim 1, wherein the pigment is a metal powder. 9. The resin molded product according to claim 1, wherein the pigment is capable of transmitting a part of light. 10. The resin molded product according to claim 1, which is semitransparent as a whole. 11. The average particle diameter of the pigment is 5.0 to 500.
μm, and the pigment is 1.
The resin molded product according to any one of claims 1 to 10, wherein the resin molded product is contained in an amount of 0 to 5.0% by weight.