JPH10258443A - Decorating sheet for simultaneous decoration with injection molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a mold and a device in the neighborhood of a portion to be fused from corroding by a method wherein no inclusion of a resin, as the monomer component of which maleic acid is included as well as a vinyl chloride-vinyl acetate copolymer, is realized in a layer itself including the vinyl chloride-vinyl acetate copolymer and in a layer adjacent to the above-mentioned layer. SOLUTION: A decorating sheet S is formed by laminating a decorative layer 32 and an adhesive layer 33 on a base material 31 in the order named. The cutting of the decorating sheet S by one shot may well be carried out after the band-like decorating sheet S is fed between a pair of molds as for a time when the decorating sheet S is cut by one shot. The reason why the employment of the resin, as the monomer component of which no laleic acid is included in the decorative sheet having a vinyl chloride-vinyl acetate copolymer, is effective for the anticorrosion of the neighborhood at the fusion of the decorating sheet, free maleic acid is estimated to accelerate the dehydrochlorination of the monomer unit of the vinyl chloride of the vinyl chloride- vinyl acetate copolymer under the condition that the monomer unit of the maleic acid or an unreacted matter is present in the resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painted sheet for simultaneous painting by injection molding.

[0002]

2. Description of the Related Art Various injection molding simultaneous painting methods for providing a pattern or the like on the outer surface of a molded article at the same time as molding the molded article have been conventionally performed. In Japanese Patent Publication No. 50-19132, a painted sheet made of a thermoplastic resin is vacuum-formed using a female mold provided with a vent hole for vacuum molding, and then both the male and female molds are clamped to form a molten resin. A method is disclosed in which a paint sheet is integrated with the outer surface of a molded article by injecting the paint sheet into a cavity formed by the method. Thus, the simultaneous injection molding painting method is a method combining vacuum molding and injection molding,
It is possible to pattern complex curved shapes. In addition, Japanese Unexamined Patent Publication No.
In 315950 gazette, after feeding a strip-shaped painted sheet wound from a roll between the male and female molds and supplying the painted sheet between the two molds so that the periphery is fixed to the female parting surface with a sheet holding frame, Move the hot platen from the retracted position outside the mold between both molds, heat and soften the painted sheet, mold the painted sheet with an injection mold, and fit it along the cavity surface,
Thereafter, a technique is disclosed in which the hot platen is retracted to a retracted position outside the mold, the molds are clamped, and a molten resin is injected into a cavity formed by the molds. When using a band-shaped painted sheet, the ease of handling after injection molding, and the heat and stress of the pre-molding step and the injection molding step are traced back to the sheet for the next shot upstream (sheet supply side). From the viewpoint of prevention and the like, there is a method of cutting the picture-coated sheet into one shot size before clamping. JP-A-6-315950
Also in the publication, a cutting means made of a heating line is provided on a hot plate,
Disclosed is a technique in which after a painted sheet is fixed to a female mold by a sheet holding frame, which is a sheet holding means, and when the hot plate approaches the painted sheet to heat and soften the painted sheet, the painted sheet is cut off by a heating line. . In Japanese Patent Publication No. 4-9647, a picture sheet is adsorbed on a heating surface of a hot platen at a retreat position outside a mold, and the picture sheet is cut by one cutting unit such as an ultrasonic cutter. A technique is disclosed in which the sheet is cut into pieces and the painted sheet is held on a hot plate and supplied between the male and female molds by the hot plate. Further, as a technique for cutting the painted sheet, a cutting blade or a heating wire is provided on the mold side, or the painted sheet is pressed against the mold by a cutting blade provided in the sheet pressing means, and the cutting blade and the mold are cut. There is also a method of cutting a sheet with a picture by joint work. Above all, the method of fusing the painting sheet with a heating wire such as a nichrome wire is a preferable form in that the structure is simpler than a blade cut by mechanical driving and the painting apparatus can be inexpensive.

[0003]

However, if the painted sheet is repeatedly melted and cut (cut by heating and melting) using heating filaments for cutting the painted sheet, the surface of the surrounding mold and the surface of equipment parts are corroded. I knew it would be done. In particular, when the cavity surface of the mold is corroded, it is a problem to be concerned because it directly affects the surface quality of the molded product. In addition, the problem of corrosion occurred in a painted sheet using a vinyl chloride-vinyl acetate copolymer for a resin such as an adhesive layer and a decorative layer. Moreover, since the vinyl chloride-vinyl acetate copolymer has good physical properties such as adhesiveness, ABS
It is an excellent resin that is frequently used in various types of molded sheets, such as ABS, vinyl chloride resin, and polypropylene resin, and is used in painting sheets using a vinyl chloride-vinyl acetate copolymer. It was desired to solve the problem.

FIGS. 3 and 4 show an example of a simultaneous injection molding painting apparatus in which a heating wire 20 is provided on a hot platen 10 for cutting a painting sheet S. FIG. In these figures, the heating filament 20
Is attached to the hot platen 10 with a support 21. Further, as shown in the figure, the heating wire extends in a direction perpendicular to the supply direction of the painting sheet at a position where the heating wire advances toward the front of the painting sheet from the heating surface of the hot platen. Thus, when the hot platen approaches the painting sheet and moves to the heating position, the heating line comes into contact with the painting sheet, and the painting sheet supplied between the two dies in the form of a strip is moved by one shot at the leading end side. Cut to size and separate from the rest. FIG. 3 shows an example in which the heating wire is provided above the outer edge 22 on the upper side of the hot platen, that is, on the upstream side of the hot platen in the painting sheet supply direction, and FIG. This is an example provided below the outer edge 22 on the upper side of the board, that is, on the downstream side in the painting sheet supply direction.
In particular, as shown in FIG. 4 rather than in FIG. 3, the heating filament is provided on the downstream side in the painting sheet supply direction (however, on the upstream side from the clamp 5), and if the painting sheet is blown, the painting sheet is accordingly reduced. Can be reduced, but as shown in FIG.
It was closer to the cavity surface of the mold, and the corrosion of the cavity surface was feared.

Therefore, in the present invention, when the above-mentioned problems are solved and the mold-fixed sheet is blown to the size of one shot by using a heating wire, and then the mold-clamping is performed, the paint-fixed sheet is coated with vinyl chloride. It is an object of the present invention to provide a painted sheet which does not corrode a metal mold or a part of an injection molding simultaneous painting apparatus or an injection molding machine around a fusing portion even when a vinyl acetate copolymer is used.

[0006]

Therefore, in order to solve the above-mentioned problems, in the present invention, a painting sheet is supplied between both molds composed of a pair of molding dies, and both the molds are clamped. When resin is injected into the cavity to be formed and the surface of the molded article is painted by transfer or lamination with a painted sheet at the same time as molding, the band-shaped painted sheet is blown to the size of one shot and then clamped. A sheet containing at least one layer made of a vinyl chloride-vinyl acetate copolymer, which is used in a simultaneous painting method for injection molding in a form, wherein the layer containing the vinyl chloride-vinyl acetate copolymer of the painted sheet Injection molding at the same time, and at least in a layer adjacent to the layer, does not contain a resin having maleic acid as a monomer component, including the vinyl chloride-vinyl acetate copolymer. It was a decorative sheet for the put. As a result, corrosion of the mold and the device around the portion to be blown is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a painting sheet for simultaneous painting by injection molding according to the present invention will be described with reference to the drawings.

First, the painting sheet for simultaneous painting by injection molding of the present invention may be in the form of a transfer sheet or a laminate sheet. FIG. 1 is a cross-sectional view showing one embodiment of the painted sheet of the present invention. The painted sheet S in FIG. 1 has a configuration in which a decorative layer 32 and an adhesive layer 33 are sequentially laminated on a base material 31. FIG. 2 shows an example of another embodiment, and the painted sheet S in FIG. 2 has a configuration including a base material 31 and a decorative layer 32. As shown in FIG. 2, in a case where the painted sheet has an adhesive property without the adhesive layer, the adhesive layer may be omitted. In the case where the painting sheet is a transfer sheet, a releasable base material is used as the base material, and the decorative layer and the adhesive layer on the base material are transfer layers to be transferred. Further, in the form of a laminate sheet, there is also a configuration having only a base material. This is a form in which the base material itself forms a decorative layer by mixing and mixing a pigment into the base material. Usually, the base sheet is not composed of the vinyl chloride-vinyl acetate copolymer itself as the painting sheet, and the vinyl chloride-vinyl acetate copolymer is used as the binder resin of the decoration layer 32 or the adhesive layer 3.
Used as 3 resin. However, a vinyl chloride-vinyl acetate copolymer may be present in other layers. For example, a vinyl chloride-vinyl acetate copolymer is added to the resin of the base material. In addition, as the simultaneous injection molding painting method using the painted sheet of the present invention, any method of preforming the painted sheet with an injection molding die or another mold, and any method of not performing the preforming of the painted sheet Applicable. Further, the timing for cutting the painted sheet into one shot may be a method in which a strip-shaped painted sheet is supplied between a pair of dies and then cut into one shot, or one outside the mold.
It may be a method of cutting into shots and supplying between the two molds as a single sheet of a painted sheet.

In the painted sheet of the present invention, the layer containing the vinyl chloride-vinyl acetate copolymer itself or at least a layer adjacent to the layer contains the vinyl chloride-vinyl acetate copolymer. In addition, it does not contain a resin having maleic acid as a monomer component. The base material used does not contain any monomer components of vinyl chloride, vinyl acetate, and maleic acid, and the constituent monomers of each layer when the base material has a decorative layer and an adhesive layer as shown in FIG. Are shown in Table 1.

[0010]

[Table 1]

More specifically, for example, when a vinyl chloride-vinyl acetate copolymer is used for the decorative layer and an adhesive layer is provided adjacent to the decorative layer, the resin in the adhesive layer includes:
A resin having maleic acid as a monomer component is not used. For example, if the adhesive is made of acrylic resin,
Maleic acid is not used as a copolymer monomer of the acrylic resin. Although maleic acid is a monomer component for improving the adhesive property, it is advisable to take measures not to use maleic acid, such as using another monomer component, for improving the adhesive property. Alternatively, it is preferable to take measures such as using a resin system which does not require maleic acid as a monomer component.

Further, maleic acid is not used as a copolymer monomer of the vinyl chloride-vinyl acetate copolymer itself in the decorative layer. That is, a vinyl chloride-vinyl acetate-maleic acid copolymer is not used. Usually, maleic acid is used as a third component, for example, at 10% by weight or less as an adhesiveness improving component. Therefore, conventionally, the use of a vinyl chloride-vinyl acetate copolymer as a resin for a binder of an ink for a decorative layer or a resin for an adhesive generally means that at least the main component and the monomer of the second component are used.
This means that a resin using vinyl chloride and vinyl acetate (also referred to as a vinyl chloride-vinyl acetate copolymer resin) is used, and in practice, maleic acid is often used as the third component. . That is, if the resin used is simply referred to as a vinyl chloride-vinyl acetate copolymer, it is scientifically a pure binary copolymer, but in a practical field where it is used, there is no explicit description. This is because a resin containing maleic acid as a copolymerizable monomer for adjusting the physical properties of the resin can be very large.

In the case of a layer not adjacent to the layer containing the vinyl chloride-vinyl acetate copolymer, even if the resin in that layer contains maleic acid as a monomer component, it does not act directly. In this regard, it is preferable that the layer containing the vinyl chloride-vinyl acetate copolymer of the picture-coated sheet itself and at least the layer adjacent to the layer do not contain a resin having maleic acid as a monomer component. However, when the painted sheet is blown off, all the layers in the thickness direction are mixed by melting, so it is more preferable that the non-adjacent layers also contain no maleic acid.

It is not clear why the use of a resin that does not contain maleic acid as a monomer component in a painted sheet having a vinyl chloride-vinyl acetate copolymer is effective against the surrounding corrosion when the painted sheet is blown. It is presumed that the maleic acid monomer unit contained therein and the free maleic acid when there is an unreacted substance accelerate the dehydrochlorination reaction of the vinyl chloride monomer unit of the vinyl chloride-vinyl acetate copolymer. Various stabilizers have been known for vinyl chloride resins from the past, and they are used for suppressing the dehydrochlorination reaction. In addition, the vinyl chloride-vinyl acetate copolymer has a point that the dehydrochlorination reaction proceeds several times more easily than the vinyl chloride resin which is a homopolymer of vinyl chloride. This seems to be the reason why the problem becomes apparent.

Each layer of the painting sheet for simultaneous painting by injection molding according to the present invention having the above-mentioned features, except for the above-mentioned points,
Various materials used for conventionally known painted sheets can be used.

For example, if it is necessary to form the painted sheet during preforming or resin molding and follow the shape of the molded product, a stretchable substrate is used. Of course, if stretchability of the painted sheet is not required, non-stretchable paper or metal sheet may be used. As the stretchable substrate, for example, a stretchable resin film is used. For example, a biaxially stretched polyethylene terephthalate film can also obtain sufficient stretchability under heating and pressing conditions depending on the shape, but easily develops stretchability at low temperature and low pressure, for example, polybutylene terephthalate,
Or low-stretch or non-stretch of thermoplastic copolymer polyester resin such as terephthalate isophthalate copolymer, polyolefin resin such as polypropylene, polyethylene, polymethylpentene, olefin thermoplastic elastomer, vinyl chloride resin, nylon, etc. Films and the like are preferred. If sheet formability is unnecessary, a strongly stretched film can be used. Also, polyvinylidene chloride, vinyl acetate-vinyl chloride copolymer (of course, in this case, there are restrictions on the maleic acid monomer as described above), vinyl polymers such as polyvinyl butyral, polystyrene,
Acrylonitrile-styrene copolymer, styrene resin such as ABS (acrylonitrile-butadiene-styrene copolymer) resin, cellulose resin such as cellulose acetate and nitrocellulose, fluorine resin such as polyvinylidene fluoride, polyvinyl fluoride, polycarbonate, A film such as an acrylic resin or a urethane thermoplastic elastomer can also be used. In the case of a transfer sheet, a rubber film that can be stretched even at room temperature can be used. The substrate is used as a single layer of these films or as a laminate of two or more layers. The thickness of the substrate depends on the material and application, but is usually 20 to 300 μm.
It is about. 50-100 from the point that it is suitable for sheet molding
μm is preferred. If the sheet is too thin, it tends to break or wrinkle when the sheet is stretched, and if it is too thick, the formability of the sheet deteriorates.

In the form of a laminate sheet, when the base material itself is used as a decorative layer, a coloring agent such as a pigment is kneaded into the resin of the base material to decorate the base material, and the base material is colored transparent, colored opaque, or colorless. Opaque or colored opaque. Known pigments are used as in the case of the decorative layer described below.

In the form of a transfer sheet, a release layer may be provided on the base of the transfer layer, if necessary, in order to improve the releasability from a transfer layer such as a decorative layer. The release layer is removed together with the substrate from the transfer layer when the substrate is released. For the release layer, for example, a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, a wax or the like is used alone or as a mixture of two or more.

The decorative layer is formed on a part or the whole surface by a conventionally known method such as gravure printing, silk screen printing, offset printing, etc., a pattern layer on which a pattern or the like is printed with a material, or a metal such as aluminum or chromium by a known vapor deposition method or the like. It is a formed metal thin film layer or the like. The pattern is a stone pattern such as marble or granite, a tile pattern, a brick pattern, a cloth pattern, a character, a geometric pattern,
Arbitrary, such as solid on the entire surface, is optional. The picture layer ink comprises a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto. Binders include thermoplastic resin such as acrylic resin, chlorinated polyolefin resin, chlorinated polypropylene, vinyl acetate, vinyl chloride-vinyl acetate copolymer, cellulose resin, polyurethane resin, epoxy resin, etc. at room temperature or thermosetting. A resin, an ionizing radiation curable resin such as an acrylic resin, or the like is used in the form of a simple substance or a mixture of these resins. As a coloring agent such as a pigment or a dye, metal pigments such as titanium white, carbon black, red iron oxide, cobalt blue, graphite, phthalocyanine blue, isoindolinone, quinacridone, and aluminum powder, and pearlescent (pearl) pigments are used. Can be

In the form of a transfer sheet, a transparent or translucent release layer which is transferred together with the decorative layer and covers the surface of the decorative layer is used to adjust the releasability between the substrate or the release layer and the decorative layer. In order to protect the surface of the decorative layer or the like, it may be provided between these layers. As the binder for the release layer, the same binder as the binder for the picture layer ink can be used. The thickness of the release layer is 0.5 to 30 μm, usually about 2 to 10 μm.

In order to further improve weather resistance (light resistance), one or both of an ultraviolet absorber and a light stabilizer can be added to the release layer. Both the agent and the light stabilizer are usually about 0.5 to 10% by weight, but it is generally preferable to use an ultraviolet absorber and a light stabilizer in combination. If the amount is less than this, the effect of improving the weather resistance cannot be sufficiently obtained, and if it is more than this, coloring occurs, and even if it is contained in a large amount, there is no effective change, which is not preferable. Examples of the ultraviolet absorber include benzotriazole-based, benzophenone-based, salicylic acid-based and other organic ultraviolet absorbers, and fine particles of zinc oxide and cerium oxide having a particle size of 0.2 μm or less.
An inorganic substance such as titanium oxide can be used. As the light stabilizer, a hindered amine radical scavenger such as bis- (2,2,2,6,6-tetramethyl-4-piperidyl) sebacate can be used.

In order to improve the adhesiveness with the resin to be formed on the back side of the painted sheet, the sheet surface is easily adhered by corona discharge treatment, known primer coating or the like, or adhered by heat-sensitive type or the like. The formation of the agent layer may be appropriately performed according to the molding resin. For the adhesive layer, a resin such as a thermoplastic resin, a thermosetting resin, or an ionomer is used. Specific examples of the resin include cellulose derivatives such as ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose, and cellulose acetate propionate; styrene resins or styrene copolymers such as polystyrene and poly-α-methyl retine; and poly (meth) acryl. Acrylic resin such as methyl acrylate, poly (ethyl meth) acrylate, poly (butyl meth) acrylate, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-
Vinyl alcohol copolymer, vinyl polymer such as polyvinyl butyral, rosin, rosin modified maleic resin, rosin modified phenol resin, rosin ester resin such as polymerized rosin, polyisoprene rubber, polyisobutyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber Polyurethane resins such as rubber resins, such as rubber resins, coumarone resins, vinyltoluene resins, polyamide resins, chlorinated olefin resins, two-component curable polyurethanes using blocked isocyanates as crosslinking agents, epoxy resins, phenolic resins, etc., and natural resins Alternatively, it is formed by coating with a coating solution comprising one or more of synthetic resins and various ionomers.

By using the painted sheet for simultaneous simultaneous injection molding of the present invention having the above-described configuration, the simultaneous painting and painting apparatus attached to the injection molding machine cuts the painted sheet for every one shot. Even if you repeat
Corrosion of the mold, the mold cavity surface, the components of the painting apparatus, and the like located around the fusing is prevented.

The resin material to be injection-molded using the painting sheet for simultaneous simultaneous injection molding of the present invention is not particularly limited, and conventionally known various resins can be used. For example,
If it is a thermoplastic resin, a polyolefin resin such as polyethylene and polypropylene, a vinyl chloride resin, an acrylic resin, an ABS (acrylonitrile-butadiene-styrene copolymer) resin, a polycarbonate resin, a styrene resin, and an AS (acrylonitrile-styrene copolymer) There are resins and the like, and as the curable resin, there are an unsaturated polyester resin, a curable acrylic resin, a two-part curable urethane resin, an epoxy resin and the like.

Next, as an example of the simultaneous injection-molding and painting method using the painted sheet of the present invention, an example in which a painted sheet is preformed by an injection mold will be described with reference to FIGS.

First, the front end of the band-shaped picture sheet S unwound from the roll is gripped from the front and back by the chuck 3 and the picture sheet is supplied between the molds before cutting the sheet shown in FIG. 3 or FIG. State. That is, the chuck 3 moves downward while holding the painting sheet S, and conveys the painting sheet to a position where the chuck 4 located below the outside of the mold can grip the leading end of the painting sheet. When the chuck 4 completes the gripping of the tip of the painting sheet, the chuck 3 releases the gripping of the painting sheet, moves upward outside the mold, returns to the original position, and grasps the painting sheet in preparation for the next shot.
Next, the clamp 5 always located between the molds moves forward (to the left in the drawing) toward the mold 1 to press and fix the painted sheet against the parting surface of the mold 1 and to move the painted sheet between the molds. Supply is completed. The clamp 5 has, for example, a rectangular frame shape so as to surround the cavity of the mold 1 and press the painted sheet. Then, the hot platen 10 moves from the retracted position outside the mold to between the molds, and moves to a position facing the painting sheet to be heated. This state is shown in FIG. 3 or FIG.

Next, as shown in FIG. 5, cutting and heating softening of the painting sheet S are performed. The hot platen 10 moves forward (to the left in the drawing) and moves to a position where it contacts the clamp 5. Then, the heating surface of the hot platen is heated at a predetermined distance from the painted sheet, and the heating wire 20 provided on the hot plate also comes into contact with the painted sheet to melt and cut the painted sheet. At this time, no corrosive gas is generated. The parting surface of the mold 1 is provided with a receiving groove 6 on the surface facing the cutting means 20 so as not to hinder the cutting operation of the heating wire. FIG. 5 shows a state immediately before these or the painting sheet is cut.

Then, after heating or softening the painting sheet, or at the same time, air is sucked in from a ventilation hole (not shown) provided in the mold 1 to form the painting sheet and bring it into close contact with the cavity surface of the mold 1. After molding, the hot platen 10 is moved and retracted from between the two dies to a retracted position outside the dies. Thereafter, both dies 1 and 2 are clamped. On the parting surface of the mold 2, a receiving groove 7 which is a concave portion capable of accommodating the clamp so that the clamp 5 does not disturb the mold clamping is provided on a surface portion facing the clamp. Then, if the resin is injected into the cavity formed by both molds and the mold is opened, a molded article whose surface is painted by the painted sheet is obtained at the same time as molding.

The term "painting" as used in the present invention means, in addition to simply giving a visible pattern such as a picture, a character, or a figure to a molded product, a pattern that is not visible, or a hard coating film or a conductive film. And the like. In addition, injection molding in the present invention means, besides injecting "thermoplastic thermoplastic resin" usually used in general injection molding, "thermosetting or two-component reaction-curing resin in a molten state at room temperature". Injecting is also included.

[0030]

According to the present invention, when a painted sheet prepared as a strip is cut by fusing in a length of one shot in the longitudinal direction, the painted sheet contains a vinyl chloride-vinyl acetate copolymer. Even if it is, the mold around when cutting,
Does not corrode parts of the injection molding simultaneous painting device or injection molding machine. In particular, even in the case where the fusing is performed with less waste of the painted sheet at a position closer to the cavity surface which affects the surface quality of the molded product in the mold, the painted sheet can be cut without corroding the cavity surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of a painting sheet for simultaneous painting by injection molding of the present invention.

FIG. 2 is a cross-sectional view of an example of another embodiment of a painting sheet for simultaneous painting by injection molding according to the present invention.

FIG. 3 is a conceptual explanatory view of an example of fusing a painted sheet with a heating wire (before cutting the sheet).

FIG. 4 is a conceptual explanatory view of another example in which a painted sheet is blown off by a heating filament (before cutting the sheet).

FIG. 5 is a conceptual explanatory view when the painting sheet is blown off by a heating wire in FIG. 4;

[Explanation of symbols]

 Reference Signs List 1 type (female type) 2 type (male type) 3 chuck (sheet gripping and conveying means) 4 chuck (sheet gripping means) 5 clamp (sheet fixing means) 6 receiving groove 7 receiving groove 10 hot platen 20 heating wire 21 support 22 Outer edge of the hot plate on the upstream side of the painted sheet supply direction 31 Base material 32 Decorative layer 33 Adhesive layer S Painted sheet

Claims (1)

[Claims] 1. A painted sheet is supplied between two molds composed of a pair of molding dies, the two molds are clamped, and a resin is injected into a cavity formed by both the molds. Or, when painting the surface of a molded article by lamination, a vinyl chloride-vinyl acetate used in a simultaneous injection molding painting method in which a band-shaped painting sheet is blown to a size of one shot and then clamped. In a painted sheet having at least one layer made of a copolymer, the vinyl chloride-vinyl acetate copolymer-containing layer itself of the painted sheet and at least a layer adjacent to the layer contain the vinyl chloride- A painting sheet for simultaneous painting by injection molding, which does not contain a resin containing maleic acid as a monomer component, including a vinyl acetate copolymer.