JP2002052568A - Method for producing molding decorated simultaneously with molding, and decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a molding decorated simultaneously with molding which is excellent in appearance and can decorate in good positional precision and a decorative sheet. SOLUTION: The decorative sheet 1 in which a pattern layer 3 is formed on one surface of a substrate sheet 2 which can be molded at a heat deterioration temperature (a temperature where a Young's modulus by JIS K7127-1989 is 80% of a Young's modulus at 25 deg.C) or below, and a moldable protective sheet 6 is laminated totally peelably on the pattern layer 3 is pre-molded at the heat deterioration temperature or below in a shape close to the outside shape of the molding, the protective sheet 6 is peeled off from the decorative sheet 1, the decorative sheet 1 is set in a molding mold 8, a molten resin is injected into the mold so that the resin contacts the surface on the pattern layer 3 side of the decorative sheet 1, and the molding in which the decorative sheet 1 and the resin are integrated is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a simultaneously-decorated molded article having a three-dimensional surface having a decorative sheet integrated on a surface thereof, and more particularly, to an automobile interior part and a home appliance decoration. Used for decoration of display parts, display panels, operation panels, operation parts and housings for amusement equipment, operation parts for communication equipment and housings, etc., and requires that the symbols be accurately arranged at arbitrary positions. TECHNICAL FIELD The present invention relates to a method for producing a molded simultaneous decorative molded product and a decorative sheet suitable for obtaining a simultaneously decorative molded product.

[0002]

2. Description of the Related Art As a method of decorating the surface of a resin molded product, a decorative sheet having a pattern layer or the like formed on a base sheet is sandwiched in a molding die, and a molten resin is injected into the die.
There is a simultaneous molding and decorating method in which a decorative sheet is adhered to the surface of a molded article at the same time as cooling to obtain a resin molded article and decorate. The simultaneous molding and decorating method has a feature that a pattern can be formed even in a molded product having a shape in which it is difficult to directly form a pattern by a printing method.

In the simultaneous molding and decorating method, when a molded article having a three-dimensional surface is decorated with a decorative sheet, a preforming mold having the same shape as the surface of the molded article is used in advance, and a vacuum molding method or the like is used. There is a method in which after a decorative sheet is preformed by a pressure forming method, the decorative sheet is mounted on a molding die and integrated with the decorative sheet simultaneously with injection molding.

[0004] As described above, by preforming the decorative sheet, the decorative sheet can be adhered to the surface of the molded product without causing wrinkling or tearing of the decorative sheet.

[0005]

However, the preforming is
The decorative sheet is heated to a temperature higher than the softening temperature, and the drawing is performed in a so-called draw-down state. In this state, the decorative sheet is very easily stretched, so the stretch of the decorative sheet during pre-forming is not uniform. Becomes

When a decorative layer is formed on a decorative sheet, and it is necessary to align the shape of the molded article with the decorative layer, if the decorative sheet has non-uniform elongation as described above, the pattern of the decorative layer may be reduced. Deformation and distortion occur, and it is difficult to align the pattern of the design layer at a desired position.

Normally, the elongation of the decorative sheet at the time of such preforming is predicted, and the pattern of the design layer is corrected in advance so that positioning can be performed. Unless the conditions of the pressure means are stable, precise alignment cannot be performed.

In order to prevent the elongation of the decorative sheet from becoming uneven, there is a method in which the decorative sheet is heated at a temperature lower than the softening temperature of the decorative sheet and preformed at a high pressure. Is heated, the uneven deformation of the decorative sheet is not completely eliminated. In addition, when the heating temperature is lowered, there is a case where a problem occurs in appearance in which a crack occurs in the design layer or the design layer is peeled off due to stress during preforming.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a method for manufacturing a simultaneously-decorated molded article which can be decorated with excellent appearance and position accuracy, and a decorative sheet. And

[0010]

Means for Solving the Problems A method for manufacturing a decorative sheet and a simultaneously decorated decorative molded article according to the present invention is constituted as follows in order to achieve the above objects.

In other words, the method for producing a simultaneously decorated and molded article according to the present invention employs a heat deterioration temperature (JIS K7127-1989).
The pattern layer is formed on one surface of a base sheet that can be formed at a temperature of not more than 80% of the Young's modulus at an environmental temperature of 25 ° C. when a tensile test is carried out based on the measurement method described above. The decorative sheet, on which a protective sheet that can be molded, is laminated so that it can be completely peeled off, is preformed into a shape that approximates the outer shape of the molded product at a temperature below the heat deterioration temperature, and then from the decorative sheet The protective sheet was peeled off and removed, and then the decorative sheet was placed in a molding die, and the molten resin was injected into the die so that the molten resin was in contact with the surface of the decorative sheet on the side of the design layer, and the decorative sheet was heated. It was configured to obtain a molded product in which the decorative sheet and the resin were integrated.

In the above invention, the preforming method may be any one of a pressure forming method, a hydraulic forming method, a mold press forming method, and a rubber press forming method.

[0013] In the above invention, the molding pressure of the preliminary molding may be 0.8 MPa or more.

Further, in the above invention, the test piece of the base sheet having a width of 20 mm and a thickness of 0.1 to 0.3 mm is placed in a test environment of a thermal denaturation temperature at a chuck-to-chuck distance of 150 mm and a mark-to-mark line. The test piece may be fixed at a distance of 100 mm, and the elongation at break may be 50% or more when one end of the test piece is subjected to a tensile test while applying a load at a constant speed of 200 mm / min.

In the above invention, the protective sheet may be made of an olefin resin, a urethane resin or a fluorine resin.

Further, in the above invention, a configuration may be adopted in which the peeling load between the base sheet and the protective sheet is 1 to 50 N / m.

Further, the decorative sheet of the present invention has a Young's modulus of 80% of the Young's modulus at an environmental temperature of 25 ° C. when a tensile test is carried out based on a heat deterioration temperature (JIS K7127-1989). The pattern layer is formed on one surface of the base sheet that can be molded at a temperature below or below, and the protective sheet that can be molded is laminated on the pattern layer so as to be completely peelable.

Further, in the above invention, the test piece of the base sheet having a width of 20 mm and a thickness of 0.1 to 0.3 mm is placed under a test environment of a thermal denaturation temperature by a chuck distance of 150 mm and a mark line. The test piece may be fixed at a distance of 100 mm, and the elongation at break may be 50% or more when one end of the test piece is subjected to a tensile test while applying a load at a constant speed of 200 mm / min.

Further, in the above invention, the protective sheet may be constituted of an olefin resin, a urethane resin or a fluorine resin.

Further, in the above invention, the peeling load between the base sheet and the protective sheet may be 1 to 50 N / m.

[0021]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the decorative sheet of the present invention. 2 to 5 are cross-sectional views showing one process of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention. FIG. 6 is a cross-sectional view showing one embodiment of a simultaneously molded and molded article obtained by the method for producing a simultaneously decorated and molded article of the present invention. FIG. 7 is a perspective view showing an apparatus for measuring the tensile strength at break and the elongation at break of the base sheet. FIG. 8 is a plan view showing a portion for fixing a test piece of an apparatus for measuring tensile strength at break and elongation at break. FIG. 9 is a cross-sectional view showing a portion for fixing a test piece of an apparatus for measuring tensile strength at break and elongation at break. In the drawing, 1 is a decorative sheet, 2 is a base sheet, 3 is a pattern layer, 4 is an adhesive layer, 5 is an adhesive layer, 6 is a protective sheet, 7 is a preforming mold, 8 is a forming mold, 9 Is a molded resin, 10 is a simultaneously molded decorative molded product, 2
0 is a test piece, 21 is a screw, 22 is a chuck, 23 is a chuck, and 24 is a movable member.

The method of manufacturing the simultaneously decorated decorative molded article 10 according to the present invention is characterized in that the thermal deformation temperature (the Young's modulus when a tensile test is carried out based on the measuring method of JIS K7127-1989) is under an environmental temperature of 25 ° C. The pattern layer 3 is formed on one surface of the base sheet 2 that can be molded at a temperature equal to or lower than 80% of the Young's modulus), and the moldable protective sheet 6 is laminated on the pattern layer 3 so as to be completely peelable. Decorative sheet 1
Is preformed into a shape approximating the outer shape of the molded product at a temperature not higher than the heat deterioration temperature, the protective sheet 6 is peeled off from the decorative sheet 1, and then the decorative sheet 1 is placed in the molding die 8. Then, the molten resin is injected into the mold so that the molten resin comes into contact with the surface of the decorative sheet 1 on the side of the design layer 3 to obtain a molded product in which the decorative sheet 1 and the resin are integrated (FIG. 1 to 6).

The decorative sheet 1 has a design layer 3 formed on one surface of a base sheet 2 that can be formed at a temperature not higher than the thermal deterioration temperature, and a protective sheet 6 that can be formed on the design layer 3 can be completely peeled off. (See FIG. 1).

As the base sheet 2, a sheet that can be formed at a temperature lower than the thermal deterioration temperature is used. The term "thermal alteration temperature" in the present invention means J
The Young's modulus of the base sheet 2 when subjected to a tensile test based on the measurement method of IS K7127-1989 is 25
A temperature at which the Young's modulus becomes 80% at an environmental temperature of ° C. That is, the heat deterioration temperature is used as an index indicating a limit at which a specific portion is not extremely elongated or the elongation does not suddenly change due to a slight temperature difference when the decorative sheet 1 is preformed. Things.

The environmental temperature in the tensile test corresponds to the temperature of the decorative sheet 1 at the time of preforming. By performing the tensile test at various environmental temperatures, the behavior of the decorative sheet 1 at the time of preforming is determined. Can be simulated.

As one of the objects of the present invention, the decorative sheet 1 having the design layer 3 exhibits stable elongation at the time of preforming, so that the pattern of the design layer 3 and the shape of the molded product do not shift. Sometimes. For that purpose, it is important that the Young's modulus of the base sheet 2 is not less than 80% of the Young's modulus at an environmental temperature of 25 ° C., that is, not more than the thermal deterioration temperature. In this range, the decorative sheet 1 at the time of preforming shows a high elongation rate at which the positioning of the symbol layer 3 becomes difficult or a low elongation rate at which the symbol layer 3 is cracked. No, the stability of the repeat accuracy with respect to the elongation in the preforming is secured,
Industrially, the yield is high.

As those having such properties, polycarbonate (PC) resin, ABS resin, urethane resin, olefin resin, polyethylene terephthalate (P
ET) resin, polybutylene terephthalate (PBT) resin, nylon resin, and other films or mixtures thereof, alloy films, and laminated films. The thickness of the base sheet 2 may be selected in consideration of moldability, printability, economy, and the like, and generally a thickness of about 50 to 500 μm is suitable. Further, as the base sheet 2, a transparent sheet may be used.

In particular, the base sheet 2 has a width of 20 mm and a thickness of 0.1 to 0.3 mm in a test environment of a thermal denaturation temperature.
Of the test piece 20 of the base sheet 2 of 150 m
m, the distance between the marked lines is fixed at 100 mm, and one end of the test piece 20 is subjected to a load at a constant speed of 200 mm / min.
It is preferable because it has excellent moldability at a temperature lower than the thermal deterioration temperature.

The width of the test piece 20 is set to 20 mm in accordance with JIS K7127-1989. The reason why the thickness of the test piece 20 is set to 0.1 to 0.3 mm is that it is easy to handle at the time of preforming and forming, and the design layer 3
Consideration is given to the easiness of formation. In addition, the reason why the heat altering temperature is set to the environmental temperature is that the decorative sheet 1 is preformed at a temperature lower than the heat alteration temperature, so that the heat altering temperature which is the highest value is adopted. Further, the test piece 20 was pulled at a speed of 200 mm / min because the vacuum forming method is a general-purpose method for processing into a three-dimensional shape. It is.

In FIGS. 7 to 9, the upper chuck 22 is fixed by screws 21 with the upper end of the test piece 20 sandwiched therebetween. Further, the lower chuck 23 is used for the test piece 2.
0 is fixed by the screw 21 with the lower end thereof sandwiched therebetween. As shown in FIG. 7, the upper chuck 22 is fixed to the test apparatus, while the lower chuck 23 is moved downward by the movable member 24 at a speed of 3 mm / sec to exert a tensile force on the test piece 20. .

The term "elongation at break" as used herein means a width of 20 mm and a thickness of 0.
A test piece 20 of the base sheet 2 of 1 to 0.3 mm is fixed at a distance between chucks of 100 mm, and one end of the test piece 20 is 3 mm.
Elongation obtained when a tensile test is performed in which a load is applied at a constant speed of / sec, that is, the elongation when the test piece 20 breaks. The elongation at break is preferably 50% or more. If it is less than 50%, it will be difficult to form a shape conforming to a molded product having a three-dimensional surface. The elongation percentage in the present invention is [(distance between chucks at break-distance between chucks before test) / distance between chucks before test] × 100 (%).

Specific examples of the base sheet 2 meeting the above conditions include a film made of urethane resin, P
Non-stretched or low-stretched film made of ET resin, PC
Alloy film of resin and PBT resin, PC resin and PET
There are resin alloy films and the like.

The design layer 3 is usually formed on the base sheet 2 as a printing layer. The printing layer may be provided entirely or partially depending on the design to be expressed. The printing layer needs to have moldable flexibility. The material of the printing layer is urethane resin, PC
It is preferable to use a colored ink containing a resin, vinyl resin, polyester resin, or the like, particularly a urethane-based resin, and an elastomer thereof as a binder and containing a pigment or dye of an appropriate color as a coloring agent. As a method for forming the printing layer, a 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 employed. If the adhesion between the design layer 3 and the base sheet 2 is insufficient, the surface of the base sheet 2 may be subjected to a corona treatment, a plasma treatment, a chemical etching treatment or the like in advance to improve the adhesion.

The design layer 3 may be made of a metal thin film layer or a combination of a printed layer and a metal thin film layer. The metal thin film layer is for expressing metallic luster as the design layer 3, and is formed by a vacuum evaporation method, a sputtering method, an ion plating method, a plating method, or the like. Depending on the metallic gloss color you want to express, aluminum,
Metals such as nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, and zinc, and alloys or compounds thereof are used. The metal thin film layer may be partially formed. When providing the metal thin film layer, a front anchor layer or a rear anchor layer may be provided in order to improve the adhesion between another transfer layer and the metal thin film layer.

An adhesive layer 4 may be provided on the design layer 3. The adhesive layer 4 is for bringing the decorative sheet 1 into close contact with a molded product made of a molten resin to integrate it.
In consideration of a post-process in which the protective sheet 6 is further laminated, it is preferable to use an adhesive layer 4 having no tack at or below the heat deterioration temperature.

As the adhesive layer 4, a heat-sensitive or pressure-sensitive resin suitable for the material of the molded product is appropriately used. For example, when the material of the molded article is an acrylic resin, an acrylic resin may be used. When the material of the molded article is a polyphenylene oxide / polystyrene resin, a polycarbonate resin, a styrene copolymer resin, or a polystyrene blend resin, an acrylic resin, a polystyrene resin, or a polyamide resin having an affinity for these resins. Resin or the like may be used. Further, when the material of the molded product is a polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, deepened rubber, and coumarone indene resin can be used. As a method for forming the adhesive layer 4, there are a gravure code method, a roll coating method, a coating method such as a comma coating method, and a printing method such as a gravure printing method and a screen printing method. Alternatively, the adhesive layer 4 can be formed by laminating an adhesive sheet made of the above-mentioned material by a laminating method or the like.

The protective sheet 6 is laminated on the pattern layer 3 or the adhesive layer 4 so as to be entirely peelable. Protection sheet 6
A material which is excellent in moldability and can be stuck and peeled on the design layer 3 or the adhesive layer 4 is used. Examples of the protective sheet 6 having such properties include an olefin resin,
Urethane resin, nylon resin, vinyl chloride resin,
There is a sheet made of a fluororesin or the like. In particular, it is preferable that the protective sheet 6 is made of an olefin-based resin, a urethane-based resin, or a fluorine-based resin because the moldability at a temperature not higher than the heat deterioration temperature is excellent. The thickness of the protective sheet 6 may be selected in consideration of formability, economy, etc.
Generally, those having a thickness of about 20 to 200 μm are preferable.

The protective sheet 6 is applied to the pattern layer 3 or the adhesive layer 4
In order to laminate the protective sheet 6 on the one side of the protective sheet 6, the adhesive layer 5 may be formed on one side of the protective sheet 6, or the surface of the protective sheet 6 may be charged.

In order to form the adhesive layer 5, an adhesive obtained by dissolving or dispersing an acrylic resin or a vinyl resin in a solvent or the like is used. It is desirable that the pressure-sensitive adhesive adheres to the protective sheet 6 and does not transfer to the design layer 3 after peeling. Apply a pressure-sensitive adhesive to one side of the protective sheet 6 using a gravure coater, reverse coater, lip coater or the like to a thickness of 0.1 to 3
The adhesive layer 5 can be formed by coating to a thickness of about 0 μm. The protective sheet 6 on which the adhesive layer 5 is formed may be laminated on the base sheet 2 on which the design layer 3 and the like are formed by pressing using a laminator or the like. Since it is necessary to remove the unnecessary protective sheet 6 after the preforming, the peeling load between the base sheet 2 and the protective sheet 6 is 1 to 4
00 N / m may be used. Particularly desirable is 1 to 50 N /
m. If the peeling load is less than 1 N / m, it is easy to peel off in the preforming step, and it becomes difficult to handle.
On the other hand, if the peeling load exceeds 400 N / m, it is difficult to peel off the protective sheet 6 after preforming, and the shape of the preformed decorative sheet 1 may be lost.

As the charging process, it is preferable to pass the protection sheet 6 between the high-voltage electrodes and perform a charging process of about 10 kV. Since the charging effect is attenuated with the passage of time, it is desirable to laminate the protective sheet 6 quickly. When the protective sheets 6 are stacked in this manner, the protective sheets 6 come into close contact with the base sheet 2 due to the action of static electricity.

Thus, the decorative sheet 1 can be obtained.

In order to obtain the simultaneously decorated decorative molded product 10,
First, the decorative sheet 1 is preformed into a shape that approximates the outer shape of the molded article at a temperature below the heat deterioration temperature (see FIGS. 2 to 3).

The preforming is performed at a temperature not higher than the thermal transformation temperature. By performing pre-forming at a temperature below the heat deterioration temperature, the decorative sheet 1
Of the pattern layer 3 becomes highly reproducible. Therefore, by correcting the pattern of the design layer 3 in advance, the alignment accuracy with the molded product can be improved.

As the preforming method, it is preferable to use a pressure forming method, a hydraulic forming method, a mold press forming method, and a rubber press forming method. These preforming methods are the decorative sheet 1
In addition, the deformation of the design layer 3 due to the elongation of the base sheet 2 accompanying the molding can be suppressed as much as possible.
In addition, when heating is performed in the preforming, not only the base sheet 2 but also the design layer 3 is softened, so that it is considered that a state in which the pattern sheet 3 easily follows local elongation. Further, when the decorative sheet 1 is preformed by a vacuum forming method or the like having a large element of heat softening, the protective sheet 6 is also softened, and there is a possibility that peeling off from the design layer 3 becomes difficult after the preforming. Therefore, in the present invention, in the preforming, the decorative sheet 1
It is important that the preforming be performed at a temperature not higher than the thermal deterioration temperature without performing heating to soften the material.

The forming pressure of the preforming is 0.8MP.
It is preferably at least a. When the thickness is within this range, the decorative sheet 1 can be formed into a shape similar to the shape of the molded product using the preforming mold 7. 0.8MPa
If it is less than, the preforming may be insufficient due to the repulsive force of the decorative sheet 1.

Next, the protective sheet 6 is peeled off from the decorative sheet 1 and removed (see FIG. 4).

When removing the protective sheet 6, the protective sheet 6
If the decorative sheet 1 is fixed to a suction jig and the decorative sheet 1 is fixed to the suction sheet, the protective sheet 6 may be peeled off. That is, a jig having the same shape as the preformed decorative sheet 1 and having a suction hole is prepared, the sheet is arranged so that the base sheet 2 side is in contact with the jig, and the decorative sheet 1 is suction-fixed. If the protective sheet 6 is peeled off, it is possible to prevent the preformed shape from being broken.

Next, the decorative sheet 1 is set in a mold,
The molten resin is injected into the mold to obtain a molded product in which the decorative sheet 1 and the resin are integrated (see FIGS. 5 and 6).

First, the decorative sheet 1 is placed in the mold such that the base sheet 2 side of the decorative sheet 1 contacts the cavity surface of the mold. If necessary, the decorative sheet 1 is brought into close contact with the cavity surface of the mold by vacuum suction and / or air pressure.

Next, the molding die 8 is clamped, and the molten resin is injected into the die (see FIG. 5).

As the molten resin, a polystyrene resin,
General-purpose resins such as polyolefin resins, ABS resins, AS resins, and AN resins can be given. In addition, polyphenylene oxide polystyrene resin, polycarbonate resin, polyacetal resin, acrylic resin,
General-purpose engineering resins such as polycarbonate-modified polyphenylene ether resin, polybutylene terephthalate resin, polybutylene terephthalate resin, ultrahigh molecular weight polyethylene resin, polysulfone resin, polyphenylene sulfide resin, polyphenylene oxide resin, polyarylate resin, polyetherimide resin, A super engineering resin such as a polyimide resin, a liquid crystal polyester resin, or a polyallyl heat-resistant resin can also be used. Further, a composite resin to which a reinforcing material such as glass fiber or inorganic filler is added can be used.

When the mold is opened, a molded product in which the decorative sheet 1 and the molding resin 9 are integrated can be obtained (FIG. 6).
reference).

In the present invention, since the base sheet 2 can be formed at a temperature lower than the heat deterioration temperature and is preformed at the temperature lower than the heat deterioration temperature, the decorative sheet 1 is brought into a drawdown state by heating during the preforming. And the positional accuracy of the symbols is not impaired. In addition, since the preforming is performed at a temperature lower than the heat deterioration temperature, the decorative sheet 1 is deformed by physical stress at the time of the preforming. However, since the pattern layer 3 is covered with the protective sheet 6, the pattern layer 3 is There is no risk of damage.

[0055]

EXAMPLE A 150 μm-thick polypropylene film was used as a base sheet, and a corona treatment was applied to one side of the base sheet so as to increase the adhesion, and a 8 μm-thick print pattern was formed thereon by screen printing using a urethane-based ink. Was formed into a design layer, and a vinyl-based non-colored adhesive layer was formed thereon by a screen printing method to a thickness of 4 μm.

A 50 μm-thick polyethylene film was used as a protective sheet, and an acrylic adhesive layer was provided on one side of the protective sheet. ,
A decorative sheet was obtained. The heat deterioration temperature of the base sheet used in this example was 80 ° C., and the peeling load of the protective sheet was 2 N / m.

The decorative sheet is heated at a temperature not higher than the heat deterioration temperature of 40.
Under an atmosphere at a temperature of 1 ° C., pressure forming was performed at a pressure of 1 MPa to preform into a three-dimensional shape.

Next, the preformed decorative sheet was punched into a molded product shape to remove extraneous parts around it, and then the protective sheet was peeled off and removed.

Next, the decorative sheet was attached to an injection molding die, and after clamping, ABS resin was injected to obtain a simultaneously molded decorative molded product.

The simultaneously molded decorative product obtained in this manner was beautiful without any positional deviation between the molded product and the design layer, and without any appearance defects such as pattern distortion and cracks in the design layer. .

[0061]

Since the present invention has the above-described structure, it has the following effects.

According to the method of manufacturing a simultaneously decorated decorative molded article of the present invention, a pattern layer is formed on one surface of a base sheet that can be molded at a temperature not higher than the heat deterioration temperature, and a moldable protective sheet is entirely formed on the pattern layer. The decorative sheet laminated so that it can be peeled off is preformed into a shape similar to the outer shape of the molded article at a temperature below the heat deterioration temperature, and then the protective sheet is peeled off from the decorative sheet and removed, and then the decorative sheet Is placed in a molding die, and the molten resin is injected into the mold so that the molten resin comes into contact with the surface of the decorative sheet on the design layer side, to obtain a molded product in which the decorative sheet and the resin are integrated. Since the preform is preformed at a temperature below the heat deterioration temperature without depending on heating in the preforming, the decorative sheet does not stretch unevenly, and the positioning of the pattern of the pattern layer and the shape of the molded product can be accurately performed. Can do well. In addition, the presence of the protective sheet can prevent cracks in the design layer or peeling of the design layer.

In the decorative sheet of the present invention, a pattern layer is formed on one surface of a base sheet that can be formed at a temperature not higher than the heat deterioration temperature, and the protective sheet that can be formed on the pattern layer can be completely peeled off. The decorative sheet can be preformed at a relatively low temperature, and cracks do not occur in the symbol layer or the symbol layer peels off during the preforming.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a decorative sheet used in the method for producing a simultaneously decorated decorative molded article of the present invention.

FIG. 2 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 3 is a cross-sectional view showing one step of the method of manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 4 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded article according to the present invention.

FIG. 5 is a cross-sectional view showing one step of the method for manufacturing a simultaneously decorated decorative molded product according to the present invention.

FIG. 6 is a cross-sectional view showing one embodiment of a simultaneously-decorated molded article obtained by the method for producing a simultaneously-decorated molded article of the present invention.

FIG. 7 is a perspective view showing an apparatus for measuring a tensile strength at break and an elongation at break of a base sheet.

FIG. 8 is a plan view showing a portion for fixing a test piece of an apparatus for measuring tensile strength at break and elongation at break.

FIG. 9 is a cross-sectional view showing a portion for fixing a test piece of an apparatus for measuring tensile strength at break and elongation at break.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative sheet 2 Base sheet 3 Pattern layer 4 Adhesive layer 5 Adhesive layer 6 Protective sheet 7 Pre-molding die 8 Molding die 9 Molding resin 10 Simultaneous decorative molding 20 Test piece 21 Screw 22 Chuck 23 Chuck 24 Movable member

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F206 AA13 AD03 AD05 AD09 AD20 AG03 AH26 AH33 JA07 JB11 JF05 JF23 JL02 JN25 JN41 4F208 AD03 AD05 AD09 AD20 AG03 AH26 AH33 MA02 MA04 MA10 MB01 MB22 MC03 MG04 MW02

Claims (10)

[Claims] 1. A heat alteration temperature (JIS K7127-19)
A pattern layer is formed on one surface of the base sheet that can be molded at a temperature of not more than 80% of the Young's modulus at an environmental temperature of 25 ° C. when a tensile test is performed based on the measurement method of 89, and A decorative sheet, in which a protective sheet that can be molded on the pattern layer is laminated so that it can be completely peeled off, is preformed into a shape that approximates the outer shape of the molded article at a temperature below the heat deterioration temperature, and then the decorative sheet The protective sheet is peeled and removed from the mold, then the decorative sheet is placed in a molding die, and the molten resin is injected into the mold so that the molten resin comes into contact with the surface of the decorative sheet on the design layer side, A method for producing a simultaneously decorated decorative molded article, characterized by obtaining a molded article in which a decorative sheet and a resin are integrated. 2. The method for producing a simultaneously decorated decorative molded product according to claim 1, wherein the preforming method is any one of a pressure forming method, a hydraulic forming method, a die press forming method, and a rubber press forming method. 3. The method according to claim 1, wherein the forming pressure of the preforming is 0.8 MPa or more. 4. A test piece of a base sheet having a width of 20 mm and a thickness of 0.1 to 0.3 mm is fixed at a distance between chucks of 150 mm and a distance between marked lines of 100 mm in a test environment in which the base sheet is at a thermal deterioration temperature. 4. The simultaneous molding and decorating method according to any one of claims 1 to 3, wherein an elongation at break is 50% or more when a tensile test is performed by applying a load at a constant speed of 200 mm / min to one end of the test piece. Manufacturing method of molded article. 5. The method according to claim 1, wherein the protective sheet comprises an olefin-based resin, a urethane-based resin, or a fluorine-based resin. 6. The method for producing a simultaneously decorated decorative molded product according to claim 1, wherein a peeling load between the base sheet and the protective sheet is 1 to 50 N / m. 7. Thermal transformation temperature (JIS K7127-19)
A pattern layer is formed on one surface of the base sheet that can be molded at a temperature of not more than 80% of the Young's modulus at an environmental temperature of 25 ° C. when a tensile test is performed based on the measurement method of 89, and A decorative sheet, characterized in that a formable protective sheet is laminated on a design layer so as to be completely peelable. 8. A test piece of a base sheet having a width of 20 mm and a thickness of 0.1 to 0.3 mm is fixed at a distance between chucks of 150 mm and a distance between marked lines of 100 mm in a test environment in which the base sheet is at a thermal denaturation temperature. The decorative sheet according to claim 7, wherein an elongation at break is 50% or more when a tensile test is performed by applying a load at a constant speed of 200 mm / min to one end of the test piece. 9. The decorative sheet according to claim 7, wherein the protective sheet is made of an olefin resin, a urethane resin or a fluorine resin. 10. The decorative sheet according to claim 7, wherein a peeling load between the base sheet and the protective sheet is 1 to 50 N / m.