JPH09183136A - Insert film and manufacture of insert molding using the film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an aluminum flake to be scarcely exposed with high luminance and concealability by sequentially laminating a high luminance metallic layer containing a metal powder and a highly concealable metallic layer containing a metal powder on a light permeable transparent base sheet having a specific thickness. SOLUTION: A high luminance metallic layer 2 and a highly concealable metallic layer 3 containing a metal powder 3 are sequentially laminated on a transparent base sheet 1 having a thickness of 20μm or more and light permeability of 85% or more. The layer 2 is laminated by using a metallic ink containing a metal powder 6, a resin binder and a solvent by a normal printing method or a coating method. A relatively rough powder 6 having a mean particle size of 14 to 40μm is used for the layer 2, and a relatively fine powder having a mean particle size of 10 to 20μm is used for the layer 3, and the materials are all aluminum, brass, gold, silver, nickel, zinc sulfide or lead.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert film for applying a metallic luster pattern to the surface of automobile bodies and exterior parts (for example, side bumpers, wheel caps, etc.), home electric appliances, audio products, etc. The present invention relates to a method for manufacturing an insert molded product.

[0002]

2. Description of the Related Art Conventionally, in order to give a metallic luster pattern to an automobile body or exterior parts, a coating material containing aluminum flakes is coated on a metal or plastic base material, and then aluminum flakes are further coated thereon. A transparent lacquer paint was applied to protect the included painted surface (see FIG. 10). By the way, as shown in FIG. 10, aluminum flakes are exposed or protruded on the coating surface of the coating material containing aluminum flakes. Aluminum flakes are corroded by acids and alkalis, so in order to prevent this, transparent flake paint was applied. Moreover, the surface of an automobile body or exterior parts is easily scratched. The board paint had to be applied multiple times to prevent scratches from scraping the layer of clear board paint and reaching the layer of paint containing aluminum flakes.

[0003]

Since the coating is repeated coating and drying, the productivity is poor and the cost is high. Moreover, since it is difficult to apply the entire surface uniformly in coating, the variation in thickness becomes large. Therefore, a product having a metallic luster pattern applied by coating has a problem in that a uniform appearance cannot be obtained or quality is not stable. Further, since the coating surface has a large unevenness in thickness and fine irregularities on the coating surface, the transparent board paint easily peels off from the convex portion over time. In the part where the transparent board paint is peeled off, the painted surface of the paint containing aluminum flakes underneath is exposed,
Corrosion of aluminum flakes. Therefore, wax must be regularly applied so that the painted surface containing the aluminum flakes is not exposed.

An object of the present invention is to solve the above-mentioned drawbacks and to provide an insert film used for producing an insert-molded article having high brightness and a concealing property, and a method for producing the insert-molded article. Moreover, it aims at providing the insert film used for manufacture of the insert molding which aluminum flakes are hard to be exposed to the surface, and the manufacturing method of an insert molding. Furthermore, it aims at providing the manufacturing method of the insert molding with high productivity.

[0005]

In order to achieve the above objects, the insert film of the present invention has a thickness
A high-luminance metallic layer containing a metal powder and a highly concealing metallic layer containing a metal powder were sequentially laminated on a transparent base sheet having a light transmittance of 85% or more at 20 μm or more. Also, on a transparent base sheet with a thickness of 20 μm or more and a light transmittance of 85% or more, the average particle size is 14 to 40.
A high brightness metallic layer containing a metal powder of μm and a high concealing metallic layer containing a metal powder having an average particle size of 5 to 20 μm may be sequentially laminated. Also,
A high-brightness metallic layer containing aluminum flakes having an average particle size of 14 to 40 μm on a transparent base sheet having a thickness of 20 μm or more and a light transmittance of 85% or more, and an average particle size of 5 to 2
A high concealing metallic layer containing 0 μm aluminum flakes may be sequentially laminated. The aluminum flakes contained in the high brightness metallic layer may be non-leafing type aluminum flakes. The IV value of the high-luminance metallic layer may be 220 or more. Further, the high-luminance metallic layer may contain spherical fine particles. Alternatively, the high-luminance metallic layer may have a thickness of 5 μm or more. Further, the concealing layer may be laminated on the highly concealing metallic layer. Alternatively, the uppermost layer may have a structure in which an adhesive layer is laminated.

According to the method for producing an insert-molded article of the present invention, any one of the above-mentioned insert films is placed in an injection-molding die, the mold is closed, and then a molten resin is injected into the die to solidify the resin. As a result, the insert film is bonded to the resin molded product so that the base sheet becomes the surface of the insert molded product.

[0007]

Embodiments of the present invention will be described below in more detail with reference to the drawings. FIG.
FIG. 3 is a schematic cross-sectional view showing an example of the insert film of the present invention. FIG. 2 is a schematic sectional view showing another embodiment of the insert film of the present invention. FIG. 3 is a schematic cross-sectional view showing a state of aluminum flakes in the metallic layer. FIG. 4 is a schematic sectional view showing an embodiment of the high brightness metallic layer of the present invention. FIG. 5 is a schematic cross-sectional view showing another embodiment of the high brightness metallic layer of the present invention. FIG. 6 is a schematic cross-sectional explanatory diagram illustrating the state of aluminum flakes in the metallic layer and the reflection of light that has entered the metallic layer. FIG. 7 and FIG.
It is a schematic cross section which each shows 1 process of the manufacturing method of the insert molded article of this invention. FIG. 9 is a schematic cross-sectional view showing an embodiment of an insert-molded product manufactured by the method for manufacturing an insert-molded product of the invention, using the insert film of the invention. In the figure, 1 is a base sheet, 2 is a high-brightness metallic layer, 3 is a high-hiding metallic layer, 4 is a hiding layer, 5 is an adhesive layer, 6 is a metal powder, 7 is a spherical fine particle,
8 is an insert film, 9 is a resin molded product, 10 is a movable mold, 11 is a fixed mold, 12 is an injection port, and 13 is a molten resin.

As the base sheet 1, a transparent sheet having a thickness of 20 μm or more and a light transmittance of 85% or more is used. 20 μm thickness
The reason why the transparent sheet having a light transmittance of 85% or more is selected is that the base sheet 1 serves as a transparent port paint in conventional coating. That is, the base sheet 1
Is the surface of the insert-molded product after insert molding, and protects the high-luminance metallic layer and the high-concealing metallic layer containing the aluminum flakes thereunder. When the thickness of the base sheet 1 is less than 20 μm, when the surface is scratched, the scratches easily reach the high-intensity metallic layer or the highly concealable metallic layer containing aluminum flakes under the base sheet. In addition, the light transmittance of the base sheet 1 is
If it is lower than 85%, the luster of the metallic luster pattern below it will not appear.

The base sheet 1 exhibits a protective function as the thickness increases, but the light transmittance decreases as the thickness increases. That is, in order to keep the light transmittance above 85%,
The upper limit of the thickness of the base sheet 1 is necessarily limited depending on the material. For example, polypropylene film of 150 μm or less, acrylic film of 300 μm or less, fluorine film of 50 μm or less, polyvinyl chloride film of 200 μm or less, polycarbonate film of 200 μm or less, 200 μm
m or less polyester film, 200 μm or less cellulose derivative film, 200 μm or less T-die polyethylene film, 200 μm or less polystyrene film and the like can be used because the light transmittance is 85% or more. Also, a composite film composed of a 5 μm fluorine film and a 45 μm acrylic film, or a composite film composed of a 25 μm polyester film and a 30 μm polypropylene film is used because the overall thickness is 20 μm or more and the light transmittance is 85% or more. be able to.

The high-brightness metallic layer 2 exhibits a metallic luster pattern and exhibits high brightness due to the metal powder 6 contained therein, and gives a product made of an insert-molded product a high-class feeling and a unique three-dimensional effect. It is a thing.

The high-intensity metallic layer 2 uses a metallic ink composed of a metal powder 6, a resin binder, a solvent and the like, and is subjected to a usual printing method such as an offset printing method, a gravure printing method and a screen printing method, a gravure coating method and a roll. The base sheet is laminated by a coating method such as a coating method or a comma coating method.

In order to exhibit a desired high brightness in the high brightness metallic layer 2, it is preferable to use a relatively coarse metal powder 6 having an average particle size of 14 to 40 μm. Further, in order to exhibit a desired high brightness, IV of the high brightness metallic layer 2 is used.
It is more preferable that the value is 220 or more. for that purpose,
When the metal powder is made into a paste with an organic solvent or water,
The metal powder paste having an IV value of 220 or more may be selected. The IV (INTENSITY VALUE) value is an index for measuring the brightness, which is one of the parameters for evaluating the metallic luster. In the metallic luster pattern,
Generally, it is said that the smoother the surface, the more specularly reflected the incident light and the higher the IV value. As the metal powder 6, aluminum, brass, gold, silver, nickel, zinc sulfide, lead or the like can be used.

The metallic luster pattern of the body and exterior parts of automobiles has a three-dimensional effect, a flip-flop effect, and
It is required to exhibit uniform brightness. The flip tone is a decorative effect in which the amount of reflected light changes depending on the viewing angle. In addition, the flop tone is a decorative effect in which the color looks different depending on the viewing angle, and is called the iridescent phenomenon. The flop tone is attributed to the shape of the pigment used, and generally, most of the transparent organic pigments can exhibit the flop tone. The use of aluminum flakes as the metal powder 6 is effective for providing a three-dimensional effect, flip-flop tone, and uniform brightness.

The aluminum flakes are usually made into a paste with an organic solvent or water and used as an aluminum paste. Aluminum flakes are aluminum powders having a scaly particle shape. The aluminum paste can be roughly classified into a leafing type containing leafing type aluminum flakes and a non-leafing type containing non-leafing type aluminum flakes. The aluminum paste used for the high-luminance metallic layer 2 is preferably a non-leafing type. The reason for this is as follows.

When a metallic layer is formed with a metallic ink containing a leafing type aluminum paste, aluminum flakes are floated above the metallic layer and arranged parallel to the surface (see FIG. 3). In the insert-molded product, since the metallic layer is turned upside down, as shown in FIG. 6A, the aluminum flakes are collected at the bottom of the metallic layer and arranged in parallel with the bottom surface. That is, since the aluminum flakes are lined up on the same surface, all the light entering the metallic layer is reflected on the same surface and looks like a plane. On the other hand, when the layer is formed with the metallic ink containing the non-leafing type aluminum paste, the aluminum flakes are evenly distributed in the metallic layer as shown in FIG. The incoming light is reflected on the surface with different depths due to the ups and downs of the aluminum flakes to give a three-dimensional effect, and the amount of reflected light changes depending on the viewing angle to give a flip tone.

In order to make the high-luminance metallic layer 2 exhibit uniform brightness, a non-leafing type aluminum paste is used, and the degree of freedom of movement of the aluminum flakes is suppressed, so that the aluminum flakes are formed on the high-luminance metallic layer 2 surface. Should be arranged as parallel as possible to. That is, when the non-leafing type aluminum flakes randomly float on the surface of the metallic layer,
As shown in FIG. 6B, the light entering the metallic layer is diffusely reflected. On the other hand, when the non-leafing aluminum flakes are arranged in parallel with the surface of the metallic layer as much as possible, the light entering the metallic layer is specularly reflected as shown in FIG. It is bright and has a uniform brightness as a whole.

The aluminum flakes are transparent and can show a flop tone in which the color looks different depending on the viewing angle. Therefore, by using a non-leafing type aluminum paste and suppressing the freedom of movement of the aluminum flakes, and arranging the aluminum flakes as parallel as possible to the surface of the high-luminance metallic layer 2, a three-dimensional effect and a flip-flop are obtained. The tone and uniform brightness can be revealed.

In order to suppress the freedom of movement of the non-leafing type aluminum flakes, it is advisable to form a number of thin film layers when forming the high brightness metallic layer 2 (see FIG. 4). By forming the high-intensity metallic layer 2 as a thin film, most of the aluminum flakes are arranged substantially parallel to the surface of the high-intensity metallic layer 2. Further, it is more preferable that the high-intensity metallic layer 2 has a thickness of 5 μm or more by stacking several thin film layers. This is because if the thickness of the high-luminance metallic layer 2 is less than 5 μm, a sufficient three-dimensional effect cannot be obtained. That is, as shown in FIG. 6C, the light entering the metallic layer is reflected by the surface of the aluminum flakes having different depths, so that a three-dimensional effect is exhibited.

Further, in order to suppress the freedom of movement of the non-leafing type aluminum flakes, it is also effective to increase the solvent concentration in the metallic ink or select a solvent that easily scatters. Is. That is, the movement itself of the aluminum flakes can be suppressed by the rapid increase in viscosity when the solvent is scattered, and the aluminum flakes can be arranged substantially parallel to the surface of the high-luminance metallic layer 2. Acetone, methyl ethyl ketone, and toluene are examples of organic solvents that are easily scattered. Further, the solvent concentration is preferably about 70 to 85%. If the solvent concentration is lower than 70%, the solid content in the high-intensity metallic layer 2 after the solvent is scattered is too large to suppress the movement of the aluminum flakes itself, and if it is higher than 85%, it is further contained. Too little aluminum flakes make it difficult to obtain the desired metallic luster pattern. Furthermore, by selecting a resin binder having a high degree of polymerization, the solid content in the high-luminance metallic layer 2 can be reduced (20% or less).

Furthermore, in order to suppress the freedom of movement of the non-leafing type aluminum flakes, it is advisable to add spherical fine particles 7 to the metallic ink (see FIG. 5). The spherical fine particles 7 are spherical fine particles, and the spherical shape means that the length of the longest diameter is 10 times or less than the length of the shortest diameter, and is not angular or sharp (hence, Scale-like things are not included). The spherical fine particles 7 may be transparent or metallic. The spherical fine particles 7 may be any color that does not impair the metallic color, and is not limited to a transparent or metallic color. Examples of the spherical fine particles 7 include silica gel having a particle diameter of 10 μm or less, an extender pigment such as barium sulfate, spherical glass beads having a particle diameter of 20 μm or less, and spherical benzoguanamine resin particles. By adding the spherical fine particles 7 to the metallic ink, a certain distance is maintained between the aluminum flakes and the other aluminum flakes, or between the aluminum flakes and the surface or the bottom surface of the high-intensity metallic layer 2 so that It is possible to suppress the movement itself and to arrange the metal layers substantially parallel to the surface of the high-luminance metallic layer 2.

In order to suppress the freedom of movement of the non-leafing type aluminum flakes, the high-intensity metallic layer 2 is formed in a thin film and many layers are stacked, and
A combination of increasing the solvent concentration in the metallic ink, selecting a solvent that easily scatters as a solvent, and adding spherical fine particles 7 to the metallic ink may be combined.

As described above, the non-leafing type aluminum paste is used for the high-intensity metallic layer 2 and the aluminum flakes are arranged as parallel to the surface of the high-intensity metallic layer 2 as much as possible. A metallic layer 2 can be achieved very easily. In addition, an insert-molded product obtained by using a non-leafing type aluminum paste for the high-intensity metallic layer 2 and using an insert film in which aluminum flakes are arranged as parallel to the surface of the high-intensity metallic layer 2 as high as possible The aluminum flakes in the brightness metallic layer 2 are arranged in parallel to the surface of the high brightness metallic layer 2, and since the high brightness metallic layer 2 is covered and protected by the base sheet, the high brightness metallic layer 2 surface Aluminum flakes do not project (see FIG. 9).

The metallic powder 6 contained in the highly concealable metallic layer 3 reveals a metallic luster pattern and exerts concealing property, and after insert molding, conceals the surface of the resin molded product 9 as a base. However, the desired metallic color and luster are exhibited without being affected by the base.

The highly concealable metallic layer 3 is composed of a metal powder 6,
Using a metallic ink made of a resin binder, solvent, etc., high-brightness by ordinary printing methods such as offset printing, gravure printing, screen printing, and coating methods such as gravure coating, roll coating, comma coating, etc. It is laminated on the metallic layer 2.

In order to exhibit the desired hiding property in the high hiding property metallic layer 3, it is preferable to use a relatively fine metal powder having an average particle size of 10 to 20 μm. Aluminum, brass, gold, silver, nickel, zinc sulfide, lead, etc. can be used as the metal powder.

As the metal powder 6, similar to the high brightness metallic layer 2, aluminum flakes made into a paste with an organic solvent or water (hereinafter referred to as aluminum paste) can be used. As with the high-brightness metallic layer 2, non-leafing type aluminum flakes can be used. However, since the high concealing metallic layer 3 becomes the lower layer of the high brightness metallic layer 2 after insert molding, either the non-leafing type or the leafing type may be used.

Further, in order to further enhance the brightness and the hiding property, a white or gray pigment may be used on the high hiding metallic layer 3 to provide the hiding layer 4 (see FIG. 2).
The hiding layer 4 uses an ink composed of a white or gray pigment, a resin binder, a solvent, and the like, and is subjected to a normal printing method such as an offset printing method, a gravure printing method, a screen printing method, a gravure coating method, a roll coating method, or a comma coating method. The base sheet is laminated by a coating method such as a coating method.

The adhesive layer 5 is a highly concealable metallic layer 3 when the adhesiveness between the highly concealable metallic layer 3 and the resin molded product 9 or the adhesiveness between the concealing layer 4 and the resin molded product 9 is poor.
Provided on the surface or on the surface of the concealing layer 4 (see FIGS. 1 and 2).
An adhesive or an adhesive film can be used as the adhesive layer 5. As the adhesive, acrylic resin, urethane resin, polyester resin, polyamide resin, ethylene butyl alcohol resin, ethylene vinyl acetate copolymer, vinyl chloride / vinyl acetate copolymer and the like can be used. As a method for forming the adhesive layer 5 or the like, a usual printing method such as an offset printing method, a gravure printing method or a screen printing method, or a coating method such as a gravure coating method, a roll coating method or a comma coating method can be adopted. . Also,
As the adhesive layer 5, an adhesive film may be laminated on the surface of the highly concealable metallic layer 3 or the surface of the concealing layer 4 and used. As the adhesive film, for example, an unstretched polypropylene film can be used and laminated by a dry lamination method.

On the base sheet 1, the high brightness metallic layer 2, the high concealing metallic layer 3, the concealing layer 4 and the adhesive layer 5 are sequentially laminated to obtain an insert film 8.

The method for producing an insert-molded article of the present invention is a method for producing an insert-molded article using the above-mentioned insert film 8. That is, the insert film 8 is placed in the injection molding die, the molten resin 13 is injected into the die after the die is closed, and the resin is solidified, so that the base sheet 1 of the insert film 8 becomes an insert molded article. The insert film 8 is adhered to the resin molded product 6 so that it becomes the surface (FIGS. 7 and 8).
reference).

The injection mold used in this manufacturing method is
It is composed of a movable die 10 and a fixed die 11. When arranging the insert film in the injection molding die, the individual insert films may be fed and arranged one by one, or the necessary portion of the long insert film may be intermittently fed and arranged. Good. When using a long insert film, it is advisable to use a feeder (not shown) having a positioning mechanism so that the pattern layer of the insert film and the molding die are in register. Moreover, when the insert film is intermittently fed and arranged, if the position of the insert film is detected by a sensor (not shown) and then the insert film is fixed by the movable mold and the fixed mold, the position is always the same. The insert film can be fixed with, and it is convenient because there is no displacement of the pattern on the pattern layer. When the insert film 8 is placed in the molding die, the insert film 8 is placed on the injection port 12 side so that the surface of the insert film 8 opposite to the surface of the base sheet 1 faces. After disposing the insert film, the insert film is brought into close contact with the inner surface of the recess of the movable die 10 by vacuum suction, heating, or the like (see FIG. 7). Thereafter, the injection molding die is closed, and the molten resin 1 is injected through the injection port 12 provided in the fixed die.
3 is injected and filled in a mold to solidify the resin, and at the same time as forming the resin molded product 9, the insert film 8 is adhered to the surface thereof (see FIG. 8). After cooling the resin molded product 9, the molding die is opened and the insert molded product is taken out.

[0032]

【Example】

Example 1 A 200 μm thick methyl methacrylate film was used as a base sheet, and a high-intensity metallic layer, a highly concealing metallic layer, a concealing layer and an adhesive layer having the following compositions were sequentially laminated by a gravure printing method to obtain an insert film. It was The high-luminance metallic layer was a single layer having a thickness of 5 μm. High-brightness metallic layer Binder Polyvinyl chloride resin 13 parts Metal powder Average particle size 32 μm Non-leafing aluminum flakes 3.5 parts Spherical particles Average particle size 4 μm Fine powder silica 0.5 parts Solvent Methyl ethyl ketone / toluene = 1/1 83 parts High concealment metallic layer Binder poly Vinyl chloride resin 13 parts Metal powder Average particle size 14 μm Non-leafing aluminum flakes 4 parts Solvent methyl ethyl ketone / toluene = 1/1 83 parts Concealment layer binder Polyvinyl chloride resin 20 parts Pigment titanium oxide, carbon black 15 parts Solvent methyl ethyl ketone / toluene = 1 / 1 65 parts Adhesive binder Binder chlorinated polypropylene resin 25 parts Solvent Methyl ethyl ketone / toluene = 1/1 75 parts

Using this insert film, a resin wheel cap having a metallic luster pattern was obtained by an insert molding method. First, it was placed in an injection-molding die consisting of a movable die and a fixed die, and the insert film was vacuum sucked while being heated at 95 ° C. to be brought into close contact with the concave portion of the movable die. After closing the mold, keep the mold temperature at 40 ℃ ~ 60 ℃, 220
Molten resin made of polypropylene resin heated to ℃ to 250 ℃ was injected into the mold to solidify the resin, and the pattern layer surface of the insert film was adhered to the resin molded product (see Fig. 8).

Example 2 A 200 μm thick methyl methacrylate film was used as a base sheet, and a high-intensity metallic layer, a highly concealing metallic layer, and a concealing layer having the following compositions were sequentially laminated by a gravure printing method, and further an adhesive film was formed. An unstretched polypropylene film having a thickness of 30 μm was laminated on the hiding layer by a dry lamination method to obtain an insert film. For the high-intensity metallic layer, a 180-line three-color printing gravure printing machine was used, and three thin film layers each having a thickness of 2 μm were overprinted so that the total thickness was 6 μm. High-brightness metallic layer Binder Polyvinyl chloride resin 13 parts Metal powder Average particle size 32 μm Non-leafing aluminum flakes 3.5 parts Spherical particles Average particle size 4 μm Fine powder silica 0.5 parts Solvent Methyl ethyl ketone / toluene = 1/1 83 parts High concealment metallic layer Binder poly Vinyl chloride resin 13 parts Metal powder Average particle size 14 μm Non-leafing aluminum flakes 4 parts Solvent methyl ethyl ketone / toluene = 1/1 83 parts Concealment layer binder Polyvinyl chloride resin 20 parts Pigment titanium oxide, carbon black 15 parts Solvent methyl ethyl ketone / toluene = 1 / 1 65 copies

Using this insert film, a resin wheel cap having a metallic luster pattern was obtained by an insert molding method. First, it was placed in an injection-molding die consisting of a movable die and a fixed die, and the insert film was vacuum sucked while being heated at 95 ° C. to be brought into close contact with the concave portion of the movable die. After closing the mold, keep the mold temperature at 40 ℃ ~ 60 ℃, 220
Molten resin made of polypropylene resin heated to ℃ to 250 ℃ was injected into the mold to solidify the resin, and the pattern layer surface of the insert film was adhered to the resin molded product (see Fig. 8).

The resin wheel caps of Examples 1 and 2 were both provided with a metallic luster pattern having high brightness and hiding power.

[0037]

The insert film of the present invention has a structure in which a high-intensity metallic layer and a high-hiding metallic layer are sequentially laminated on a transparent substrate sheet having a thickness of 20 μm or more and a light transmittance of 85% or more. . In addition, the method for producing an insert-molded article of the present invention is such that the insert film is placed in an injection-molding die, the molten resin is injected into the die after the die is closed, and the resin is solidified to form a base sheet. The insert film is adhered to the resin-molded product so that the surface of the insert-molded product becomes. Therefore, using the insert film of the present invention, the insert molded article obtained by the method for producing an insert molded article of the present invention has a surface of the resin molded article which is concealed by the high concealing metallic layer, and when viewed from the surface, a substrate The bright metallic layer is visible through the sheet. That is, since the high-luminance metallic layer exhibits high luminance and the high-hiding metallic layer exhibits hiding, the insert-molded article obtained by the present invention has high luminance and hiding.

Further, the insert film of the present invention is
The transparent substrate sheet having a thickness of 20 μm or more and a light transmittance of 85% or more has a structure in which a high brightness metallic layer and a high hiding metallic layer are sequentially laminated. Further, the manufacturing method of the insert molded article of the present invention, the insert film,
The insert film is placed in a mold for injection molding, and after the mold is closed, the molten resin is injected into the mold and the resin is solidified so that the base sheet becomes the surface of the insert molded product and the insert film is molded into the resin molded product. It is configured to adhere to. Therefore, in the insert-molded article obtained by the method for producing an insert-molded article of the present invention using the insert film of the present invention, the metallic layer is covered with a thick base sheet having a thickness of 20 μm or more. The surface of is a flat surface without irregularities. That is, since the aluminum flakes are not exposed on the surface and the base sheet surface is a flat surface, the base sheet is hardly peeled off with time, the aluminum flakes are hardly exposed on the surface, and the surface is not scratched. Even when the scratches are generated, it is difficult for the scratches to reach the high brightness metallic layer and the high concealing metallic layer.

Further, in the method for producing an insert-molded article of the present invention, the insert film is placed in an injection-molding die, the mold is closed, and then a molten resin is injected into the die to solidify the resin. Since the insert film is bonded to the resin-molded product so that the base sheet is on the surface of the insert-molded product, it has good productivity and is suitable for mass production.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of an insert film of the present invention.

FIG. 2 is a schematic cross-sectional view showing another embodiment of the insert film of the present invention.

FIG. 3 is a schematic cross-sectional view showing a state of aluminum flakes in the metallic layer.

FIG. 4 is a schematic cross-sectional view showing an embodiment of the high-luminance metallic layer of the present invention.

FIG. 5 is a schematic cross-sectional view showing another embodiment of the high brightness metallic layer of the present invention.

FIG. 6 is a schematic cross-sectional explanatory diagram illustrating a state of aluminum flakes in the metallic layer and reflection of light that has entered the metallic layer.

FIG. 7 is a schematic cross-sectional view showing a step in the method for producing the insert-molded product of the present invention.

FIG. 8 is a schematic cross-sectional view showing a step in the method for producing an insert-molded product of the present invention.

FIG. 9 is a schematic cross-sectional view showing an example of an insert-molded article manufactured by the method for manufacturing an insert-molded article of the present invention using the insert film of the present invention.

FIG. 10 is a schematic cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Base Sheet 2 High Bright Metallic Layer 3 High Concealment Metallic Layer 4 Concealment Layer 5 Adhesive Layer 6 Metal Powder 7 Spherical Fine Particles 8 Insert Film 9 Resin Molded Product 10 Movable Type 11 Fixed Type 12 Injection Port 13 Molten Resin

Claims (10)

[Claims] 1. A high-brightness metallic layer containing a metal powder and a high concealing metallic layer containing a metal powder are sequentially formed on a transparent base sheet having a thickness of 20 μm or more and a light transmittance of 85% or more. An insert film characterized by being laminated. 2. A high-brightness metallic layer containing a metal powder having an average particle size of 14 to 40 μm on a transparent substrate sheet having a thickness of 20 μm or more and a light transmittance of 85% or more, and an average particle size of 5
An insert film, characterized in that a highly concealable metallic layer containing a metal powder of ˜20 μm is sequentially laminated. 3. A high-brightness metallic layer containing aluminum flakes having an average particle size of 14 to 40 μm on a transparent base sheet having a thickness of 20 μm or more and a light transmittance of 85% or more,
An insert film, characterized in that a highly concealing metallic layer containing aluminum flakes having an average particle size of 5 to 20 μm is sequentially laminated. 4. The insert film according to claim 3, wherein the aluminum flakes contained in the high-intensity metallic layer are non-leafing type aluminum flakes. 5. The insert film according to claim 1, wherein the high-luminance metallic layer has an IV value of 220 or more. 6. The insert film according to claim 1, wherein the high-intensity metallic layer contains spherical fine particles. 7. The insert film according to claim 1, wherein the high-luminance metallic layer has a thickness of 5 μm or more. 8. The insert film according to claim 1, wherein a hiding layer is laminated on the high hiding metallic layer. 9. The adhesive layer is laminated on the uppermost layer.
The insert film according to claim 8. 10. The insert film according to any one of claims 1 to 9 is arranged in an injection molding die,
Insert molding characterized by injecting a molten resin into the mold after the mold is closed and solidifying the resin to bond the insert film to the resin molded product so that the base sheet becomes the surface of the insert molded product. Method of manufacturing goods.