JP2006142698A - Manufacturing method of mulyilayer molded article and multilayer molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a multilayer molded article, which, in producing the multilayer molded article by arranging a decorative sheet inside a cavity and injecting a resin into the cavity to make a resin molded body solid with one surface of the decorative sheet, does not bring about molding defects on the surface, such as scratches and smudges, and also restrains the optical design of the surface from deteriorating. <P>SOLUTION: Using a laminate sheet 15 which has a protective film 16 provided on one surface of a decorative sheet 14, there is conducted an integral molding process wherein, on one surface of the decorative film 14, a resin molded body is integrated, and then a release process to release the protective film is conducted. At that time, as the protective film 16 there is used one formed with a material whose contact face 16a with the decorative sheet 14 has a lower Vicat softening point than the outer face 13a of the surface layer 13 of the decorative sheet 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a multilayer molded article such as an automobile interior / exterior component, and a multilayer molded article obtained by the production method.

For interior parts such as console panels, center clusters, and switch bases, and exterior parts such as bumpers, side mat guards, wheel caps, and moldings, decorative sheets with patterns such as woodgrain and metallic tones, A multilayer molded body integrated with a molded body made of resin is widely used.
As a method for producing such a multilayer molded body, there is a method of integrating a decorative sheet and a resin molded body by placing a decorative sheet in a cavity of a mold and injecting a molten resin into the cavity. is there. At this time, the decorative sheet may be three-dimensionally formed in advance so as to conform to the shape of the cavity and disposed in the cavity, or may be disposed in the cavity while remaining flat. In the case where they are arranged in a flat shape, the three-dimensional molding of the decorative sheet and the integration of the decorative sheet and the resin molded body are simultaneously performed by injecting the molten resin.

As a decorative sheet used in this way, for example, in Patent Document 1, a pattern printing ink layer and a transparent acrylic resin sheet layer are sequentially laminated on a layer (sheet layer and backer layer) made of ABS resin. A sheet is disclosed.
In addition, some of these decorative sheets exhibit optical design properties by giving the surface a glossy specular tone or a matte tone with no gloss. As a method of manufacturing a mirror-like decorative sheet, there is a method of pressing and molding the surface of the decorative sheet with a mirror-finished metal surface. On the other hand, as a method for producing a matte decorative sheet, a method of providing a surface sheet with a matting agent made of transparent light diffusing particles or the like added to the transparent sheet on the surface of the decorative sheet, There is a method of physically forming irregularities on the surface by embossing. Furthermore, some decorative sheets have a three-dimensional surface to exhibit three-dimensional design. As a specific method, there is a method of printing a resin on the surface in a dot shape or a dome shape in addition to embossing.

However, when a multilayer molded body is produced by the above-described method using the decorative sheet having the optical design and the three-dimensional design provided on the surface as described above, a cavity is formed on the treated surface thus treated. Because the inner surface of the surface is in direct contact with and pressed under heating conditions, the surface state of the inner surface of the cavity is transferred to the processing surface, and the optical designability and three-dimensional designability of the processing surface are reduced. There was a problem that.
Furthermore, the surface of the decorative sheet is likely to be attached with foreign matters such as dust due to electrification, and the inner surface of the cavity may be contaminated with dirt, stains, etc. due to such foreign matters or oils and fats. In the case of producing a multilayer molded body, foreign matter, dirt, etc. may adhere to the surface of the obtained multilayer molded body, or scratches may occur, resulting in molding defects.

Therefore, for example, as described in Patent Documents 2 and 3, the protective film is provided on the surface of the decorative sheet and molded as described above, and then the protective film is peeled off to remove the decorative sheet. There are methods for suppressing deterioration of the optical design of the treated surface and molding defects such as scratches and dirt.
JP 2001-334609 A JP-A-10-329170 JP 2002-059452 A

  However, when the conventional protective film is formed on the surface of the decorative sheet in this way, even if molding defects such as scratches and dirt can be suppressed, the optical design and three-dimensionality of the treated surface of the decorative sheet In some cases, the deterioration in designability could not be sufficiently suppressed.

  The present invention has been made in view of the above circumstances, and arranges a decorative sheet in a cavity and injects resin into the cavity to produce a multilayer molded body in which a resin molded body is integrated on one side of the decorative sheet. In this case, an object of the present invention is to provide a method for producing a multilayer molded article that does not cause molding defects such as scratches and dirt on the surface, and also suppresses deterioration of the optical designability and three-dimensional designability of the surface.

The method for producing a multilayer molded body according to the present invention includes a laminated sheet having a protective film provided on one surface of a decorative sheet, in a flat shape or after being three-dimensionally molded and disposed in the cavity, An integral molding step of injecting resin into the decorative sheet and integrating the molded body made of the resin on the other surface side of the decorative sheet, and a peeling step of peeling the protective film after the integral molding step A method for producing a multilayer molded article, wherein the contact surface of the protective film with the decorative sheet is formed of a material having a smaller Vicat softening point than one surface of the decorative sheet, To do.
This method is suitable when the one surface of the decorative sheet has been subjected to a matte treatment or a mirror finish treatment.
Moreover, it is suitable also when the said one surface of the said decorating sheet is three-dimensionally processed.
Further, the decorative sheet is a laminate in which a base material layer, a pattern layer, and a surface layer are sequentially laminated, and the one surface of the decorative sheet is composed of the surface layer, and the other surface is the base layer. What consists of a material layer is preferable.
The multilayer molded article of the present invention is manufactured by any one of the methods described above.

  According to the method for producing a multilayer molded article of the present invention, a decorative molded sheet is placed in a cavity and a resin is injected into the cavity to produce a multilayer molded article in which the resin molded article is integrated on one side of the decorative sheet. In this case, it is possible to produce a multilayer molded article that is free from molding defects such as scratches and dirt on the surface and is excellent in surface optical design and three-dimensional design.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an example of a multilayer molded body 10 manufactured by the manufacturing method of the present invention, and includes a decorative sheet 14 composed of a base layer 11, a picture layer 12, and a surface layer 13, and a molded body composed of a resin (hereinafter referred to as a molded body). , Which is a resin molded body). In this multilayer molded body 10, as shown in the figure, the resin molded body 20 is integrated on the base material layer 11 side of the decorative sheet 14. The outer surface 13a of the surface layer 13 is provided with irregularities (not shown) by embossing to give a matte design.

When manufacturing such a multilayer molded body 10, first, a multilayer sheet 15 as shown in FIG. 2 is used, and the multilayer sheet 15 and the resin molded body 20 are integrated in a cavity of a mold. An integral molding process for manufacturing the molded body 10 is performed.
The laminated sheet 15 includes a decorative sheet 14 in which a base layer 11, a pattern layer 12, and a surface layer 13 are sequentially laminated, and a protective film 16 laminated on the outer surface 13 a of the surface layer 13 of the decorative sheet 14. It is.
There is no restriction | limiting in particular as a material of the base material layer 11 which comprises the decorating sheet 14, For example, olefin resin, such as polypropylene (PP) and polyethylene (PE) other than ABS resin and polyvinyl chloride (PVC), is illustrated. And a sheet made of these resins can be used. Moreover, the base material layer 11 may be a laminate of a plurality of resins such as PP / PET, and in that case, a multilayer sheet composed of a plurality of resin layers can be used for the base material layer 11. Although the thickness of the base material layer 11 can be appropriately set according to the type of the resin and the like, 0.2 to 1.0 mm is preferable because of excellent shape followability when the multilayer molded body 10 is formed.

  The pattern layer 12 is usually provided by a method of forming a pattern on the base material layer 11 by, for example, various printing methods or image forming methods. Examples of printing methods include gravure printing method, gravure offset printing method, offset printing method, dry offset printing method, flexographic printing method, letterpress printing method, screen printing method, inkjet printing method, electrostatic printing method, etc. Examples of the method include various coating methods such as a roll coating method, a gravure coating method, a knife coating method, a lip coating method, a die coating method, and a comma coating method, a photolithographic method, an electrophotographic method, and a transfer method. Although there is no restriction | limiting in particular in the thickness of the pattern layer 12, Usually, it is 1-30 micrometers.

As shown in FIG. 1, the surface layer 13 is the outermost layer of the multilayer molded body 10, and in this example, the outer surface 13a is formed with unevenness by embossing to give a matte design. Has been.
Examples of the material of the surface layer 13 include various thermoplastic resins, and a sheet made of these can be used for the surface layer 13. The surface layer 13 may be a laminate of a plurality of resins. In that case, a multilayer sheet composed of a plurality of resin layers can be used. Examples of the thermoplastic resin include acrylic resins, PVC, polyvinylidene fluoride (PVDF), olefin-based resins, polyesters, and the like that have transparency that allows the pattern layer 12 to be visually recognized.
In these, since it is excellent in the balance of a weather resistance, transparency, surface hardness, workability, etc., the sheet | seat which consists of an acrylic resin and a polyvinylidene fluoride resin can be used conveniently.
Moreover, although there is no restriction | limiting in particular in the thickness of the surface layer 13, Usually, it is 20-150 micrometers.

The protective film 16 laminated on the outer surface 13a of the surface layer 13 is peeled off in a peeling step performed after the integral molding step, and is a contact surface 16a with the decorative sheet 14, that is, the outer surface 13a on which irregularities are formed. It is necessary that the contact surface 16a is made of a material having a smaller Vicat softening point than the outer surface 13a.
By using the laminated sheet 15 provided with such a protective film 16 on the surface layer 13 side of the decorative sheet 14, the surface of the multilayer molded body 10 (the outer surface 13 a of the surface layer 13) in an integral molding step described later. It is possible to suppress molding defects that cause scratches, dirt, etc., a decrease in optical design properties of the surface, and a decrease in three-dimensional design properties.

As a specific method of manufacturing the multilayer molded body 10 using the laminated sheet 15 of FIG. 2, as schematically shown in FIG. 3, a mold 30 comprising a pair of male mold 31 and female mold 32 is used. After the laminated sheet 15 is disposed at a predetermined position of the cavity 33 and clamped, the molten resin is injected from the resin injection gate 34 formed in the male mold 31. Thus, the laminated sheet 11 is three-dimensionally molded, and the resin molded body 20 is molded and integrated on the base material layer 11 side of the laminated sheet 11 (integral molding step). Examples of the resin to be injected include polyethylene resin, polypropylene resin, polycarbonate resin, ABS (acrylonitrile-butadiene-styrene) resin, vinyl chloride resin, acrylic resin olefin-based thermoplastic elastomer, and the like.
Thereafter, the mold 30 is cooled, the molded body in which the laminated sheet 15 is integrated on the surface of the resin molded body 20 is taken out from the cavity, and the protective film 16 is peeled from the laminated sheet 15 (peeling step), whereby the multilayer shown in FIG. A molded body 10 is obtained.
In addition, the trimming process which cuts out the unnecessary part of the lamination sheet 15 or the decorating sheet 14 is suitably performed between an integral formation process and a peeling process, or after a peeling process.
Further, in addition to the method of arranging the laminated sheet 15 in a predetermined position while maintaining a flat shape as described above, the laminated sheet 15 is preliminarily formed so as to conform to the shape of the cavity 33 by vacuum forming or the like before the integral forming step as necessary. A three-dimensionally formed laminated sheet 15 may be disposed at a predetermined position by performing a three-dimensionally formed machining process. Furthermore, you may perform the trimming process of excising the unnecessary part of the lamination sheet 15 previously before an integral formation process.

  According to such a method, the laminated sheet 15 in which the protective film 16 is provided on the outer surface 13a of the surface layer 13 in the decorative sheet 14 is used as a sheet used when the resin molded body 20 is integrated. Therefore, in the integral molding process, molding failure of the surface of the multilayer molded body 10, a decrease in optical design property, and a decrease in three-dimensional design property do not occur.

That is, by providing such a protective film 16, it is possible to prevent foreign matters such as dust from adhering to the outer surface 13a of the surface layer 13 during transportation and storage of the decorative sheet 14, and as a result, This prevents molding defects such as scratches and dirt. Further, since the protective film 16 is provided in this way, the outer surface 13a of the surface layer 13 and the inner surface of the cavity 33 are not in direct contact with each other in the integral molding process. Therefore, even if dirt, stains, or the like due to foreign matters or oils or fats adhere to the inner surface of the cavity 33, molding defects due to this can be suppressed.
Furthermore, since the protective film 16 used here is formed of a material having a smaller Vicat softening point than the outer surface 13a of the surface layer 13 of the surface layer 13 of the decorative sheet 14, the contact surface 16a with the decorative sheet 14 is integrated. In the molding process, even if the outer surface 13a of the surface layer 13 is pressed by the inner surface of the cavity 33 via the protective film 16, the irregularities formed on the outer surface 13 are absorbed without being crushed. Therefore, the optical design of the outer surface 13a of the surface layer 13 can be maintained.
Here, the Vicat softening point is measured by the JIS K 7206 B50 method.

As long as the contact surface 16a of the protective film 16 is formed of a material having a specific Vicat softening point as described above, the material is not particularly limited. However, the protective film 16 has a surface layer during transportation and storage of the laminated sheet 15, in an integral molding process, and in a machining process of the laminated sheet 15 that is performed as necessary on the upstream side of this process. 13 is not required to be peeled off. On the other hand, it is required that the laminated sheet 15 and the resin molded body 20 can be easily peeled from the surface layer 13 after being integrated. Furthermore, the protective film 16 is also required to have heat resistance that can withstand heat processing in the cavity 33.
Therefore, as a preferred specific example of the protective film 16, the contact surface 16a is formed by a self-adhesive layer made of an ethylene-vinyl acetate copolymer or the like, and this self-adhesive layer and an olefin layer such as polyethylene are laminated. A two-layer film by two-layer extrusion can be mentioned. According to such a protective film composed of a two-layer film, it is possible to achieve both adhesion and releasability that firmly adheres to the surface layer 13 before the peeling step and easily peels off in the peeling step. It becomes. Further, since such a two-layer film also has transparency, the surface state of the multilayer molded body 10 can be inspected through the film between the integral molding step and the peeling step.

Other suitable materials for forming the contact surface 16a of the protective film 16 are low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-α olefin copolymer, ethylene-ethyl acrylate. Examples thereof include thermoplastic resins typified by olefin resins such as copolymers, ethylene-butyl acrylate copolymers, ethylene-methyl methacrylate copolymers, and polypropylene.
Low-density polyethylene includes linear low-density polyethylene (LL) and branched low-density polyethylene (LD), which may be used alone or in a blend of two or more. From the viewpoint of safety, it is preferable to use a high pressure LD. Linear low density polyethylene (LL) is a homopolymer of ethylene or a copolymer of ethylene and an α-olefin in the range of 4 to 10 carbon atoms. You may use the above mixed composition.
Examples of the α-olefin include 1-butene, 1-pentene, 1-hexene, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-heptene, 1-octene, and 1-decene. .

In addition to the thermoplastic resin described above, the protective film 16 may include an ultraviolet absorber, an anti-aging agent, an antioxidant, an antifogging agent, a pigment, a flame retardant, a filler, a reinforcing material, and a blocking agent as necessary. Various additives such as an agent, a lubricant, an antistatic agent, a plasticizer, and a tackifier can be added.
Examples of tackifiers include terpene resins, rosins, rosin derivatives, and the like, and these are appropriately mixed with a thermoplastic resin to form the protective film 16, thereby allowing adhesion and peeling of the surface layer 13 to the outer surface 13 a. Can be adjusted.

Further, the protective film 16 is an adhesive in a 180 ° C. peeling test with a bonding pressure of 3 MPa and a peeling speed of 500 mm / min in a test environment of 26 ° C. and 40% RH with respect to the outer surface 13a of the surface layer 13 of the contact surface 16a. When the force is in the range of about 2 to 350 g / 25 mm, both adhesiveness and peelability are exhibited, which is preferable.
Although there is no restriction | limiting in particular in the thickness of the protective film 16, Usually, it is 0.025-0.1 mm. Moreover, when the outer surface 13a of the surface layer 13 is embossed and various three-dimensional processed, and the difference between the highest part and the lowest part is Δh, the thickness of the protective film 16 is It is preferably at least twice as large as Δh.

  In the above example, as the decorative sheet 14 to be used, an example in which the outer surface 13a of the surface layer 13 is embossed and has a matte design is given. Is not limited to embossing. As other matting treatment methods, a matting agent containing fine particles is coated on the outer surface 13a of the surface layer 13, or the matting agent is mixed in advance with the resin of the sheet material forming the surface layer and then the sheet. There is a method of forming into a shape. According to these methods, the fine particles contained in the matting agent form irregularities on the outer surface 13a of the surface layer 13 and develop a matte feeling. Examples of the fine particles contained in the matting agent include inorganic particles such as silica, alumina, calcium carbonate, barium sulfate, aluminosilicate, mica, and resin particles such as polyethylene, polycarbonate, polyamide, and polyurethane.

Further, as the decorative sheet 14, in addition to the sheet having the matte design, the outer surface 13 a of the surface layer 13 may be mirror-finished to provide the mirror-like design. Even in that case, the laminated sheet 15 provided with the protective film 16 is disposed in the cavity 33, and the above-described integral molding process is performed, whereby the specular design on the surface of the obtained multilayer molded body 10 is achieved. Can be maintained.
There is no particular limitation on the method of mirror surface treatment that imparts a specular design, and examples thereof include a method of pressing the outer surface 13a of the surface layer 13 with a pressing means having a mirror-finished pressing surface made of stainless steel.
Further, the decorative sheet 14 may be one in which various three-dimensional processes are applied to the outer surface 13a of the surface layer 13 to impart a three-dimensional design. Examples of a method for imparting three-dimensional design properties include a method of printing a resin in a dot shape or a dome shape by screen printing or the like in addition to embossing. There is no limitation on the type of resin used here, as long as it is in close contact with the surface layer 13, for example, vinyl chloride / vinyl acetate copolymer resin, acrylic resin, polyester resin, polyurethane resin, Examples include epoxy resins, chlorinated polyolefin resins, and acrylic urethane resins. According to the manufacturing method described above, such a three-dimensional design can be maintained.
Furthermore, the decorative sheet 14 does not necessarily have the pattern layer 12 formed, and in that case, a non-transparent sheet may be used for the surface layer 13.

  According to such a manufacturing method, it is possible to suppress a decrease in surface optical design and a three-dimensional design as well as molding defects such as dirt and scratches on the surface of the multilayer molded body 10 in the integral molding step. The multilayer molded body 10 having excellent appearance and good design can be produced. The specific use of the multilayer molded body 10 is not particularly limited. For example, the multilayer molded body 10 can be used in the fields of architecture, home appliances, and the like, and particularly, automobile interiors such as console panels, center clusters, and switch bases that require high designability. It is suitable for automobile exterior parts such as parts, bumpers, side mat guards, wheel caps, and moldings.

Hereinafter, the present invention will be specifically described with reference to examples.
[Example 1]
After heating both surfaces of the laminated sheet with the protective film laminated to the surface layer of the decorative sheet in which the base material layer, the pattern layer, and the surface layer are laminated in sequence, the mold at 40 ° C. is heated to 150 ° C. with a halogen heater. Then, it was vacuum formed with a vacuum suction force of 1.8 atm to obtain a three-dimensional laminated sheet. Furthermore, this was punched into a desired shape with a press die with a cutting blade to obtain a three-dimensional laminated molded body.
Next, this insert was placed in the cavity of the insert molding die so that the protective film of the three-dimensional laminated molded body was in close contact with the cavity surface. Next, an ABS resin is injection-molded at a molding temperature of 220 to 230 ° C. and a mold temperature of 65 ° C. in a cavity formed by clamping the fixed mold and the movable mold, and the three-dimensional laminated molded article and the ABS resin are brought into close contact with each other. (Integral molding process). After cooling, the multilayer molded body with a protective film was taken out from the mold, and the protective film was peeled off (peeling step) to obtain a multilayer molded body.
On the surface of the obtained multilayer molded article, there were no molding defects such as scratches and dirt, and no reduction in matte design was observed.

The following were used for each layer and protective film of the decorative sheet.
1) Base material layer: ABS sheet (F975BR448) manufactured by Shin-Etsu Polymer Co., Ltd., thickness 0.36 mm
2) Pattern layer: transferred from a printed PET sheet manufactured by Nippon Decor Co., Ltd. to a base material layer by a transfer method. The pattern layer thickness is 2.3 μm, and the PET thickness is 0.025 mm.
3) Surface layer (matte tone); Sumitomo Chemical Co., Ltd. acrylic resin sheet (S001 M20), thickness 0.125 mm, outer surface coated with matting agent, outer surface (contact surface with protective film) The Vicat softening point is 95-100 ° C. Here, the Vicat softening point is measured by the JIS K 7206 B50 method.
4) Protective film: Masking film made by Daio Kagami Kogyo Co., Ltd. The contact surface with the outer surface of the decorative sheet consists of an ethylene-vinyl acetate copolymer layer (15 μm) having a Vicat softening point of 60 to 65 ° C. A laminate of polyethylene layers (35 μm) with a Vicat softening point of 75-80 ° C. In addition, when the 180 degree peeling test from the surface layer of the protective film was performed by the pasting pressure of 3 MPa and the peeling speed of 500 mm / min under the test environment of 26 ° C. and 40% RH, the adhesive strength was 25 g / 25 mm.

[Example 2]
On the outer surface of the same surface layer as in Example 1, a dome-shaped solid having a diameter of 5 mm at a pitch of 10 mm and a height of 0.02 mm was screen-printed with a solvent-type acrylic urethane resin-based screen ink (VAR) manufactured by Teikoku Ink. 3D processing was applied.
Moreover, as a protective film, the Vicat softening point of the contact surface with the outer surface of a decorating sheet consists of an ethylene-vinyl acetate copolymer layer (20 micrometers) of 55-60 degreeC, and this has a Vicat softening point of 70-75 degreeC. A polyethylene layer (60 μm) was used. In addition, when the 180 degree peeling test from the surface layer of the protective film was performed by the pasting pressure of 3 MPa and the peeling speed of 500 mm / min under the test environment of 26 ° C. and 40% RH, the adhesive strength was 70 g / 25 mm.
Other than this, a multilayer molded body was obtained in the same manner using the same laminated sheet as in Example 1.
On the surface of the obtained multilayer molded article, there were no molding defects such as scratches and dirt, and no deterioration in design properties due to three-dimensional processing was observed.

[Comparative Example 1]
A decorative sheet was produced in the same manner as in Example 1 except that a decorative sheet without a protective film was used, and a multilayer molded body was obtained. However, the surface of the decorative sheet was uneven and unsatisfactory. And the design was poor. Several scratches were also observed.

[Comparative Example 2]
As a protective film, the contact surface with the outer surface of the decorative sheet is made of an acrylic pressure-sensitive adhesive (thickness 2 μm), and a polypropylene layer (thickness 45 μm) is laminated thereon, and the Vicat softening point of the contact surface is 120 to 130 ° C. A multi-layer molded body was obtained in the same manner as in Example 2 except that one was used. The dome-shaped solid provided on the surface layer was held by vacuum molding and pressed from the cavity surface during injection molding. Sinking into the surface layer, the three-dimensional design was lost.

It is sectional drawing which shows an example of the multilayer molded object manufactured with the manufacturing method of this invention. It is sectional drawing which shows the lamination sheet used with the manufacturing method of this invention. It is explanatory drawing of the manufacturing method of the multilayer molded object of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Multilayer molded object 11 Base material layer 12 Image layer 13 Surface layer 13a Outer surface of surface layer 14 Decorating sheet 15 Laminated sheet 16 Protective film 16a Contact surface with decorative sheet in protective film 33 Cavity

Claims (5)

The laminated sheet having a protective film provided on one surface of the decorative sheet is placed in a cavity in a flat shape or after being three-dimensionally molded, and a resin is injected into the cavity, thereby the decorative sheet An integrated molding step of integrating the molded body made of the resin on the other surface side of the step, and a method of manufacturing a multilayer molded body comprising a peeling step of peeling the protective film after the integral molding step,
The method for producing a multilayer molded body, wherein the contact surface of the protective film with the decorative sheet is formed of a material having a smaller Vicat softening point than the one surface of the decorative sheet.   The method for producing a multilayer molded article according to claim 1, wherein the one surface of the decorative sheet is subjected to a matting process or a mirror surface process.   3. The method for producing a multilayer molded article according to claim 1, wherein the one surface of the decorative sheet is subjected to three-dimensional processing.   The decorative sheet is a laminate of a base material layer, a pattern layer, and a surface layer sequentially, wherein the one surface of the decorative sheet is composed of the surface layer, and the other surface is the base material layer. The manufacturing method of the multilayer molded object in any one of Claim 1 thru | or 3 characterized by these. A multilayer molded article produced by the production method according to claim 1.

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