JPH06286290A - Manufacture of transfer film and multi-colored plastic molded form - Google Patents

Abstract

(57) [Abstract] [Purpose] A pattern can be easily formed on the surface of a translucent plastic molded product having a surface that cannot be formed by printing, and a pigment ink layer, a light-shielding dyeing part, a metal layer and a hard coat layer are combined. It is possible to obtain a multicolored plastic molded product in which the pattern having a rich design property can be formed on the surface of the translucent plastic molded product, and the patterns of three or more different colors are accurately registered. [Structure] The transfer film 4 is brought into close contact with the surface of the translucent plastic molded product 1, heated and pressed, and a transfer product 6 in which the pigment ink layer 43 and the masking layer 42 are transferred to the translucent plastic molded product 1 is obtained. After obtained, a light-shielding dyeing ink layer is formed on the surface of the light-transmissive plastic molded product 1, heated to form a light-shielding dyeing portion, and then the light-shielding dyeing ink layer and the masking layer 42 are removed, thereby performing light-shielding dyeing. A multicolor plastic molded product in which the pigment ink layer 43 appears in the blank character pattern of the part is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer film and a multicolor plastic molded product for producing a multicolor plastic molded product such as a front panel and a switch button of an AV device, a key top of a personal computer and an instrument panel of an automobile. It relates to a manufacturing method.

[0002]

2. Description of the Related Art In multi-colored plastic molded products such as front panels and buttons for AV equipment, key tops for personal computers, and instrument panels for automobiles, the pattern itself such as letters and symbols on the front side emits light when illuminated from the back side. Some other portions are configured to block light. Further, in order to improve the designability and handleability, there are many molded products having a rounded shape and a raised shape, and there is an increasing demand for characters and patterns to be attached to the surface of such molded products. Conventionally, this type of multicolor plastic molded product is manufactured as follows.

(1) A transparent pigment ink layer having a pattern such as characters and symbols is formed on a flat surface of the surface of a transparent plastic molded product by a printing method such as tacho printing or screen printing, It is manufactured by forming a light-shielding pigment ink layer on a portion other than the pigment ink layer.

(2) An undercoat layer is formed on the surface of a light-transmitting plastic molded product with a light-transmitting pigment ink, a metal layer is formed on the undercoat layer, and a light-shielding paint is applied on the entire surface. In order to form a pattern of characters, symbols, etc., a predetermined portion of the light-shielding paint and the metal layer is removed by laser etching, and the undercoat layer is exposed in a pattern of characters, symbols, etc. to manufacture.

(3) A light-transmissive plastic molding portion in which only a pattern portion such as letters and symbols is projected is injection-molded,
Next, the light-shielding plastic molding part is injection-molded so as to cover all but the protruding part of the light-transmitting plastic molding part, and the light-transmissive plastic molding part and the light-shielding plastic molding part are overlapped to manufacture.

In addition, in (1) to (3), in order to improve the designability of the multicolored plastic molded product, a metal layer is formed to form a glossy pattern, and the wear resistance of the pattern is improved. Therefore, a hard coat layer is formed on the pattern.

(4) On the surface of the light-transmissive plastic molded product, first, a dye-proof and dyeing ink layer, which is a mixture of a heat transferable dye and a dye-proof resin, is formed by printing and heated to form a light-transmitting dyed portion. Then, a light-shielding dyeing ink layer containing a heat transferable dye is formed on the surface of the light-transmitting plastic molded product by printing, and heated to form a light-shielding dyeing part. It is manufactured by removing the dye-proof and dyeing ink on the surface of the product. On the surface of the translucent plastic molded product covered with the dye-proof and dye-ink, the dye-proof function of the dye-proof and dye-ink works, and the light-shielding dye part is not formed.

[0008]

In (1), since the light-transmitting pigment ink layer having a pattern of characters and symbols is formed by a printing method, the pattern of characters and symbols can be formed only on a flat surface. For example, concave curved surface or uneven surface with large undulations,
Since it is impossible to print on a plurality of surfaces of a three-dimensional molded product having a polyhedral shape, it is difficult to form a light-transmitting pigment ink layer having a pattern of characters or symbols. Therefore, this is a manufacturing method in which only a product having a limited shape capable of forming a pattern can be obtained.

The method (2) is a manufacturing method in which an extra layer such as an undercoat layer or a metal layer is formed or laser etching is performed, which takes time and labor and is poor in productivity. Further, it was a manufacturing method in which only a plastic molded product having two different colors (color tone and color), that is, the color of the light-shielding paint and the color of the undercoat layer, was obtained, and only a product with poor design was obtained.

In (3), only a plastic molded product having two different colors, that is, the color of the light-transmissive plastic molded part and the color of the light-shielding plastic molded part, can be obtained. Further, in the two-color molding apparatus, it was a manufacturing method in which a fine line portion was difficult to be expressed and only a product having a poor design was obtained. In addition, two kinds of molds, a mold for injection-molding the light-transmissive plastic molding part and a mold for injection-molding the light-shielding plastic molding part, and an injection device must be prepared. It was a manufacturing method in which each time the number increased to 3 colors and 4 colors, costs such as equipment costs were required.

In addition, in (1) to (3), in order to provide a metal layer, a hard coat layer, and the like, in addition to the formation of patterns such as characters and symbols, extra processing is performed by a vacuum vapor deposition device or a coating device. Must be given. Therefore, it is a manufacturing method that requires much labor and time to complete a multicolor plastic molded product on which a metal layer and a hard coat layer are formed.

In (4), a metal layer or a hard coat layer cannot be provided in the light-transmitting dyed portion. This is because when a metal layer or a hard coat layer is provided on the dye-proof and dyeing ink layer, it is removed together with the dye-proof and dyeing ink layer. Also, when a metal layer or a hard coat layer is provided between the dye-proof and dyeing ink layer and the light-transmissive plastic molded product, the heat-transfer dye is translucent because the heat-transferable dye is disturbed by the metal layer or the hard coat layer. This is because heat cannot be transferred to the surface layer of the plastic molded product. Therefore, it is a manufacturing method in which a product in which a metal layer or a hard coat layer and a light-transmitting dyeing part are combined cannot be formed and only a product having no design is obtained.

Further, when a plastic molded product of three or more different colors is obtained, since the plates are changed for each different color and printing is performed one by one, it is difficult to register the patterns of different colors. It was a manufacturing method that was likely to result in a multicolor plastic molded product with poor registration accuracy between patterns of different colors.

According to the present invention, a pattern can be easily formed even on the surface of a light-transmissive plastic molded product having a surface that cannot be formed by printing, and a pigment ink layer, a light-shielding dyed portion, a metal layer and a hard coat layer are combined. Aims to obtain with high productivity a multicolored plastic molded product in which a pattern with rich design can be formed on the surface of a transparent plastic molded product, and patterns of three or more different colors are accurately registered. .

[0015]

The transfer film of the present invention comprises a base film having releasability, on which a patterned masking layer composed of characters or symbols is formed, and further, a larger area than the masking layer is colored. The formed pigment ink layer was formed so as to cover the masking layer.

Further, the transfer film of the present invention is such that a patterned masking layer consisting of characters and symbols is formed on a base film having releasability, and the pigmented ink has a larger area than the masking layer. A layer was formed so as to cover the masking layer, and an adhesive layer was further formed.

In the transfer film of the present invention, a metal layer may be formed so as to be sandwiched between at least a part between the masking layer and the pigment ink layer.

In the transfer film of the present invention, the hard coat layer may be formed so as to be sandwiched between at least a part between the masking layer and the pigment ink layer.

In the method for producing a multicolored plastic molded article of the present invention, the pigment ink layer or the adhesive layer located at the outermost layer of any one of the transfer films is brought into close contact with the surface of the translucent plastic molded article, and heated and pressed. Then, the substrate film is peeled off to obtain a transfer product in which the pigment ink layer and the masking layer are transferred to the translucent plastic molded product, and then the light-shielding dyeing ink layer containing the heat transferable dye is formed on the surface of the transfer product. After forming and heating, the heat transferable dye in the light-shielding dyeing ink layer is heat-transferred to the surface layer of the portion requiring light-shielding, and then the light-shielding dyeing ink layer and the masking layer are removed to shield the blank character pattern from light. By forming the dyed portion, a multicolor plastic molded product in which the pigment ink layer appears in the blank character pattern of the light-shielding dyed portion was configured.

In the method for producing a multicolored plastic molded article of the present invention, any one of the transfer films described above is sandwiched between a pair of injection molding dies, and a light-transmissive molding resin is injected into the cavity of the dies, followed by cooling. After that, the substrate film is peeled off to obtain a molding simultaneous transfer product in which the pigment ink layer and the masking layer are transferred to the translucent plastic molding product, and then the surface of the simultaneous molding transfer product is shielded from light containing a heat transferable dye. Form a dyed ink layer,
After heating, heat-transferring the heat transferable dye in the light-shielding dyeing ink layer to the surface layer of the portion requiring light-shielding, remove the light-shielding dyeing ink layer and the masking layer, and remove the light-shielding dyeing part of the blank character pattern. By forming it, a multicolor plastic molded product in which the pigment ink layer appears in the blank character pattern of the light-shielding dyed portion was obtained.

In the method for producing a multicolored plastic molded article of the present invention, a light-shielding dyeing ink layer containing a water-soluble or alcohol-soluble resin is used, and the light-shielding dyeing ink layer and the masking layer are removed by washing with water or alcohol. It may be configured to do so.

[0022]

According to the present invention, a masking layer and a pigment ink layer are formed on the surface of a translucent plastic molded product by a transfer method using a transfer film or a simultaneous molding transfer method, and then the transferred product or the simultaneous molding transfer product is formed. By forming a light-shielding dyed portion on the surface layer by an appropriate method, it is difficult to print a light-transmissive plastic molded product, for example, a surface having a concave curved surface (see FIGS. 6 to 8) or a plurality of polyhedral solid molded products. Patterns such as characters and symbols are formed on the surface (see FIGS. 11 to 15).

Further, according to the present invention, since the masking layer is formed in a smaller area than the pigment ink layer, a portion of the surface of the pigment ink layer where the masking layer is not formed, such as an end portion of the pigment ink layer, is formed. The heat transferable dye in the light-shielding dyeing ink layer transfers heat. Therefore, at the end of the pigment ink layer, it is formed so as to overlap the light-shielding dyeing portion,
Since the color of the light-shielding dyed portion is darker than the color of the pigment ink layer, it becomes the color of the light-shielding dyed portion (see FIGS. 7 and 8).

Further, by removing the light-shielding dyeing ink layer and the masking layer, the pigment ink layer is exposed on the surface of the light-transmissive plastic molding covered with the light-shielding dyeing ink layer in the same pattern as the masking layer. Exhibits the color of the pigment ink layer. In this manner, the portion of the light-shielding dyed portion and the portion of characters and symbols showing the color of the pigment ink layer appear on the surface of the multicolor plastic molded product (see FIGS. 8 and 14). That is, the registration of the patterns of the pigment ink layers having different colors is regulated by the pattern of the masking layer previously formed on the transfer film.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. The transfer film 4 of the present invention will be described (see FIGS. 1 to 5). The base film 41 has releasability, and for example, there is a film such as polyethylene terephthalate coated with a release agent such as wax on the surface thereof.

The masking layer 42 is a layer which prevents the heat transferable dye in the light-shielding dyeing ink layer 5 described later from dyeing the pigment ink layer 43 which is also described later. For example, it may be formed by a screen printing method using an ink mixed with an extender pigment such as a cellulose resin or calcium carbonate. The masking layer 42 is formed in a pattern of characters and symbols. Masking layer 42
With this pattern, a blank character pattern of the light-shielding dyeing section 3 described later is formed.

The pigment ink layer 43 is a layer containing a coloring pigment and colored. The pigment ink layer 43 may be colored so as to have a light blocking property or may be colored so as to have a light transmitting property. The pigment ink layer 43 includes, for example, a coloring pigment such as metal powder or an organic pigment, an acrylic resin,
It may be formed by a screen printing method using an ink in which a resin binder such as polyester resin and a solvent are mixed.

The pigment ink layer 43 has a larger area than the masking layer 42 and is formed so as to cover the masking layer 42.
The pigment ink layer 43 may be formed in such a size that it is formed on the entire surface of the light-transmitting plastic molded product 1. When forming the pigment ink layers 43 of different colors, for example, the first pigment ink layer 47 and the second pigment ink layer 48, the first pigment ink layer 47 and the second pigment ink layer are formed on one masking layer 42. Either one of the pigment ink layers 43 of 48 may be formed, or both the first pigment ink layer 47 and the second pigment ink layer 48 may be formed adjacent to each other on one masking layer 42. May be (Fig. 2
(See (b)).

The pigment ink layer 43 is the first pigment ink layer 4
7 and the second pigment ink layer 48, a third color different from the first pigment ink layer 47 and the second pigment ink layer 48.
A pigment ink layer (not shown) may be formed.

When a resin having adhesiveness is used in the pigment ink layer 43, the pigment ink layer 43 is adhered to the translucent plastic molded product 1. However, when the pigment ink layer 43 does not have adhesiveness, it is advisable to separately provide the adhesive layer 44 (see FIG. 2A).

In the transfer film 4 of the present invention, the metal layer 45 may be formed so as to be sandwiched between at least a part between the masking layer 52 and the pigment ink layer 53 (see FIG. 3 (a)). . The first pigment ink layer 47, the metal layer 45, and the second pigment ink layer 48 may be sequentially formed on the masking layer 52 (see FIG. 3B).
The metal layer 45 includes a layer formed by a vacuum vapor deposition method, a sputtering method, an ion plating method, a layer on which gold foil or silver foil is attached, a layer on which a metallic pigment ink is printed, or the like. The metal layer 45 may be formed so as to completely reflect light and have a gloss, or may be a semitransparent material that partially transmits light.

In the transfer film 4 of the present invention, the hard coat layer 46 may be formed so as to be sandwiched between at least a part of the masking layer 42 and the pigment ink layer 43 (see FIG. 4). The hard coat layer 46 is a layer formed by a printing method or the like using a photocurable resin that is cured by being irradiated with an electron beam or an ultraviolet ray, or a thermosetting resin that is heated.

In the transfer film 4 of the present invention, the metal layer 4
5 and the hard coat layer 46 are both masking layers 42.
It may be formed so as to be sandwiched between at least a part between and the pigment ink layer 43 (see FIG. 5). In this case, since the metal layer 45 is protected by the hard coat layer 46, the resistance of the metal layer 45 is improved.

In the transfer film 4 of the present invention, the ultraviolet shielding layer may be formed between the masking layer 42 and the pigment ink layer 43 (not shown). The ultraviolet shielding layer is
Organic UV absorbers such as salicylic acid UV absorbers,
Alternatively, it is a layer formed by a printing method or the like using an ink in which an ultraviolet absorber composed of inorganic fine particles such as titanium oxide or zinc oxide is mixed in a resin binder.

A method for producing a multicolored plastic molded product using the transfer method will be described (see FIGS. 6 to 8 and 15). First, the pigment ink layer 43 of the transfer film 4 is brought into close contact with the surface of the light-transmissive plastic molded product 1, heated and pressed, and then the base film 41 is peeled off to remove the pigment ink layer 43.
And the masking layer 42 are transferred from the transfer film 4 to the translucent plastic molded product 1 to obtain a transfer product 6 in which the pigment ink layer 43 and the masking layer 42 are formed on the surface of the translucent plastic molded product 1 ( (See FIG. 6).

The light-transmissive plastic molded product 1 is a molded product which has a light-transmitting property and is molded from a plastic material which is heated and dyed with a heat transfer dye, such as polybutylene terephthalate resin. The shape of the translucent plastic molded article 1 is, for example, a shape having a surface such as a concave curved surface that cannot be printed by a printing method (see FIG. 6), a polyhedral shape (see FIG. 11), or a printed shape. Some of the shapes have possible flat surfaces.

The heating and pressurization may be carried out at a temperature of about 200 to 250 ° C. with a heated rubber roll or silicon pad. By heating and pressurizing, the adhesive resin of the pigment ink layer 43 softens and adheres to the surface of the light-transmissive plastic molded product 1. When the adhesive layer 44 is formed on the transfer film 4, the adhesive layer 44 adheres to the surface of the translucent plastic molded product 1.

Next, the light-shielding dyeing ink layer 5 containing the heat transferable dye is formed on the surface of the transfer product 6 (see FIG. 7). As the light-shielding dyeing ink layer 5, any color can be used as long as it contains a heat-transfer dye having a color capable of blocking light. For example, using black disperse dye, water-soluble or alcohol-soluble resin, water, ink mixed with isopropyl alcohol,
It is formed by a screen printing method, a spraying application method, a dipping method, a printing method, or the like. Examples of the water-soluble or alcohol-soluble resin include acrylic resin, cellulose resin, vinyl alcohol resin and the like.

Next, the heat transferable dye in the light-shielding dyeing ink layer 5 is heat-transferred to the surface layer of the light-transmissive plastic molded article 1 where light-shielding is required by heating to form the light-shielding dyeing portion 3 ( (See FIG. 8). The surface layer of the translucent plastic molded article 1 means, among the inside of the translucent plastic molded article 1,
It is a portion close to the surface of the translucent plastic molded product 1. The heating is performed at a temperature at which the heat transferable dye in the light-shielding dyeing ink layer 5 transfers heat to the surface layer of the light-transmissive plastic molded product 1 to dye it. The temperature and the heating time are adjusted depending on the combination of the material of the heat transferable dye and the material of the translucent plastic molded product 1. For example, when a polybutylene terephthalate resin is used as the light-transmissive plastic molded product 1 and a black disperse dye is used as the light-shielding dyeing ink layer 5, it is preferable to perform heating at about 150 ° C. for 5 minutes.

The heat transferable dye in the light-shielding dyeing ink layer 5 is
Of the surface layer of the translucent plastic molded product 1, heat is transferred to a portion where the masking layer 42 is not formed, and heat is not transferred to a portion where the masking layer 42 is formed. End 4 of pigment ink layer 43 where masking layer 42 was not formed
The heat transferable dye in the light-shielding dyeing ink layer 5 also transfers heat to 31. The dyeing depth of the light-shielding dyeing part 3 is 10 μm from the surface of the light-transmissive plastic molded product 1 in order to obtain sufficient light-shielding property.
m or more is preferable.

Next, the light-shielding dyeing ink layer 5 and the masking layer 42 are removed to form the light-shielding dyeing portion 3 having a blank character pattern (see FIG. 8).

Removal of the light-shielding dyeing ink layer 5 and the masking layer 42 to which the heat-transferring dye has transferred heat is carried out by removing the pigment ink layer 43.
However, use a liquid that does not dissolve. For example,
It may be performed by washing with water or alcohol. When the hard coat layer 46 is formed so as to be sandwiched between at least a part of the masking layer 42 and the pigment ink layer 43, the pigment ink layer 4 is protected by the hard coat layer 46. The resin forming the layer 4 is not limited to the water-soluble or alcohol-soluble resin.

A method for producing a multicolored plastic molded product using the molding simultaneous transfer method will be described (see FIGS. 9 to 15). First, the transfer film 4 is sandwiched between a pair of injection molding dies 71 (see FIG. 9), and the light-transmissive molding resin 72 is injected into the cavities 73 of the dies (see FIG. 10). After cooling, the substrate is cooled. The material film 41 is peeled off (see FIG. 11), and the pigment ink layer 43 and the masking layer 42 are transferred from the transfer film 4 to the transparent plastic molded product 1 at the same time when the transparent plastic molded product 1 is molded. A molded simultaneous transfer product 7 in which the pigment ink layer 43 and the masking layer 42 are formed on the optical plastic molded product 1 is obtained (see FIG. 12).

A cavity 73 is formed by closing the pair of injection molding dies 71 (see FIG. 9). A resin injection hole 74 through which the light-transmissive molding resin 72 is injected is formed in one of the injection molding dies 71. Examples of the molding resin 72 include polybutylene terephthalate resin and the like.

When the molding resin 72 is injected into the cavity 73 and comes into contact with the pigment ink layer 43, the adhesive resin of the pigment ink layer 43 is softened and adheres to the surface of the light-transmissive plastic molded product 1. (See Figure 10). When the adhesive layer 44 is formed on the transfer film 4, the adhesive layer 44 adheres to the surface of the translucent plastic molded product 1.

Next, a light-shielding dyeing ink layer 5 containing a heat transferable dye is formed on the surface of the molded simultaneous transfer product 7 (see FIG. 13). Various conditions such as components and size of the light-shielding dyeing ink layer 5 and a forming method are the same as those in the manufacturing method by the transfer method.

Next, the heat transferable dye in the light-shielding dyeing ink layer 5 is heat-transferred to the surface layer of the portion requiring light shielding by heating (see FIG. 14). Various conditions such as the heating temperature, the pattern of the light-shielding dyeing portion 3 and the depth of dyeing are the same as those in the manufacturing method by the transfer method.

Next, the light-shielding dyeing ink layer 5 and the masking layer 42 are removed to form the light-shielding dyeing portion 3 having a blank character pattern (see FIG. 15).

When the number of colors of the pigment ink layer 43 is increased as a transfer film using the above-mentioned transfer method or simultaneous molding transfer method, one transfer film is used or only simultaneous transfer molding is performed. It is possible to easily obtain a multicolor plastic molded product in which a pattern is drawn in a color different from that of the color and which is rich in design.

When the transfer film used in the transfer method or the molding simultaneous transfer method has the pigment ink layer 43, the metal layer 45 and the hard coat layer 46 as constituent layers, one transfer film is used. A transparent plastic molded product that has various functions such as protection of the pigment ink layer 43 or various designs such as colored glossy colors such as gold and silver by simply transferring or using simultaneous transfer. It can be easily formed on the surface of 1. Therefore, it is not necessary to subject the light-transmissive plastic molded product 1 to an extra process using a vacuum vapor deposition device, a coating device, or the like, which saves labor and time.

Further, as a transfer film used in the transfer method or the molding simultaneous transfer method, the pigment ink layer 43 and the masking layer 42 are divided, and the metal layer 4 is formed on the pigment ink layer 43.
5 and the hard coat layer 46 are used.
Therefore, the pigment ink layer 43 is a layer that remains on the surface of the translucent plastic molded product 1 without being removed together with the removal of the masking layer 42. Therefore, the metal layer 45 and the hard coat layer 46 is not removed together with the pigment ink layer 43. Therefore, a combination of the designable metal layer or the hard coat layer and the pigment ink layer can be formed, and a product with excellent designability can be obtained.

[0052]

In the method for producing a transfer film and a multicolored plastic molded product of the present invention, the transfer film is used to form the pigment ink layer, and the light-shielding dyeing ink is used to form the light-shielding dyeing portion. It is possible to easily form a pattern with the pigment ink layer even on a surface that is difficult to form by printing, and it is possible to obtain a product whose shape is not restricted.

Further, according to the present invention, since the pigment ink layer is patterned by using the masking layer, it is easy to register the patterns of the pigment ink layers of different colors, and a pattern formed by dyeing with high registration accuracy is formed. Multicolored plastic moldings are obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a transfer film used in the method for producing a multicolor plastic molded product of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of a transfer film used in the method for producing a multicolor plastic molded product of the present invention.

FIG. 3 is a cross-sectional view showing another embodiment of the transfer film used in the method for producing a multicolor plastic molded product of the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the transfer film used in the method for producing a multicolor plastic molded product of the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of a transfer film used in the method for producing a multicolor plastic molded product of the present invention.

FIG. 6 is an explanatory cross-sectional view showing that the pigment ink layer and the masking layer are transferred to the translucent plastic molded product and the base film is peeled off in the method for producing a multicolored plastic molded product of the present invention. .

FIG. 7 is an explanatory cross-sectional view in which a light-shielding dyeing ink layer is formed in the method for producing a multicolor plastic molded product of the present invention.

FIG. 8 is an explanatory cross-sectional view in which the masking layer is removed by thermally transferring the heat transferable dye of the light-shielding dyeing ink layer to the translucent plastic molded product in the method for producing a multicolor plastic molded product of the present invention. .

FIG. 9 is an explanatory cross-sectional view of a transfer film sandwiched between a pair of injection molds in the method for producing a multicolor plastic molded product of the present invention.

FIG. 10 is an explanatory cross-sectional view of a molding resin injected into a cavity of an injection molding die in the method for manufacturing a multicolor plastic molded product of the present invention.

FIG. 11 is an explanatory cross-sectional view in which the pigment ink layer and the masking layer are transferred to the translucent plastic molded product and the base film is peeled off in the method for producing a multicolored plastic molded product of the present invention. .

FIG. 12 is an explanatory cross-sectional view of a molded simultaneous transfer product.

FIG. 13 is an explanatory cross-sectional view in which a light-shielding dyeing ink layer is formed in the method for producing a multicolor plastic molded product of the present invention.

FIG. 14 In the method for producing a multicolored plastic molded product of the present invention, the heat transferable dye in the light-shielding dyeing ink layer is heat-transferred to the surface layer of the translucent plastic molded product to form a masking layer and a light-shielding dyeing ink layer. It is explanatory cross-sectional view of the removed part.

FIG. 15 is a perspective view of a multicolor plastic molded product obtained by the method for manufacturing a multicolor plastic molded product of the present invention.

[Explanation of symbols]

 1 Light-transmissive plastic molded product 3 Light-shielding dyeing part 4 Transfer film 41 Base film 42 Masking layer 43 Pigment ink layer 431 Edge part 44 Adhesive layer 45 Metal layer 46 Hard coat layer 47 First pigment ink layer 48 Second pigment ink layer 5 Light-shielding dyeing ink layer 6 Transfer product 7 Simultaneous molding transfer product 71 Injection mold 72 Mold resin 73 Cavity 74 Resin injection hole

Claims (7)

[Claims] 1. A patterned masking layer composed of characters and symbols is formed on a base film having releasability, and a pigmented pigment ink layer having a larger area than the masking layer covers the masking layer. A transfer film, which is formed on. 2. A patterned masking layer composed of characters and symbols is formed on a base film having releasability, and a pigmented pigment ink layer having a larger area than the masking layer covers the masking layer. The transfer film, which is formed on the substrate and further has an adhesive layer formed thereon. 3. The transfer film according to claim 1, wherein a metal layer is formed so as to be sandwiched between at least a part of the masking layer and the pigment ink layer. 4. The transfer film according to claim 1, wherein a hard coat layer is formed so as to be sandwiched between at least a part of the masking layer and the pigment ink layer. 5. A pigment ink layer or an adhesive layer positioned on the outermost layer of the transfer film according to any one of claims 1 to 4 is brought into close contact with the surface of the translucent plastic molded article,
After heat and pressure, the substrate film is peeled off to obtain a transfer product in which the pigment ink layer and the masking layer are transferred to the translucent plastic molded product, and then the light-shielding dyeing containing the heat transferable dye on the surface of the transfer product. After forming an ink layer and heating it, the heat transferable dye in the light-shielding dyeing ink layer is heat-transferred to the surface layer of the portion that needs light-shielding, and then the light-shielding dyeing ink layer and the masking layer are removed, and the extracted characters A method for producing a multicolor plastic molded product, which comprises forming a light-shielding dyed part of a pattern to obtain a multicolored plastic molded product in which a pigment ink layer appears in a blank character pattern of the light-shielding dyed part. 6. The transfer film according to claim 1 is sandwiched between a pair of injection molding dies, a translucent molding resin is injected into a cavity of the dies, and after cooling,
Light-shielding dyeing ink containing heat transferable dye on the surface of the simultaneous molding transfer product after peeling the base material film to obtain a simultaneous molding transfer product in which the pigment ink layer and the masking layer are transferred to the transparent plastic molding product. After forming a layer and heating, the heat transferable dye in the light-shielding dyeing ink layer is heat-transferred to the surface layer of the portion that needs light-shielding, then the light-shielding dyeing ink layer and the masking layer are removed, and the character pattern is extracted. A method for producing a multicolored plastic molded article, characterized in that a multicolored plastic molded article in which a pigment ink layer appears in a blank character pattern of the light-shielded dyed section is formed by forming the shaded dyed section. 7. The light-shielding dyeing ink layer and the masking layer are removed by washing with water or alcohol as the light-shielding dyeing ink layer containing a water-soluble or alcohol-soluble resin. Manufacturing method of colored plastic moldings.