JP2019202515A - Method for manufacturing decorative molded product - Google Patents

Abstract

To provide a method for manufacturing a decorative molded product capable of obtaining a decorative molded product that is less susceptible to the influence of surface roughness of a base material and a quality of the base material, and excels in smoothness of the surface.SOLUTION: A method for manufacturing a decorative molded product in which a decorative film is pasted on a surface of a base material includes: a decoration step for vacuum pressure molding in a state in which the base material, the decorative film, and a resin plate are piled up in this order; and a step for removing the resin plate placed on the decorative film and pasted on the base material after the decoration step. The resin plate has an arithmetic average roughness of a surface in contact with the decorative film of 0.1 μm or less, and an elastic modulus at a molding temperature of the vacuum pressure molding of 30 MPa or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for producing a decorative molded product.

Conventionally, by attaching a film having a design surface to a molded product, a design such as a color, a pattern, a design, or a character is imparted to the molded product and decorated. As a method for producing a decorative molded product, a method of attaching a decorative film using vacuum forming, vacuum pressure forming, or the like is known (for example, Patent Document 1).

In Patent Document 1, an adhesive sheet in which an adhesive layer is disposed on one surface of a stretchable release film is subjected to vacuum forming, pressure forming, or vacuum / pressure forming so that the adhesive layer is placed on the uneven molded product side. A method for manufacturing a laminated molded product is disclosed, which includes a laminating step (1) of laminating on the surface of the uneven molded product so as to be arranged.

Japanese Patent Application Laid-Open No. 2015-196289

When a decorative film is manufactured by attaching a decorative film to the surface of a molded product (base material), the surface of the base material is rough depending on the degree of roughness of the base material surface. Depending on the unevenness, the surface of the decorative molded product also has unevenness, which may impair the appearance design. In order to reduce the roughness of the substrate surface, it is possible to increase the finishing accuracy of the mold for forming the substrate, or to apply a decorative film after smoothing the surface of the substrate Although conceivable, there are restrictions such as an increase in manufacturing process and cost.

In addition, a molding plate such as a medium density fiberboard (MDF) made of wood fiber may be used as a building material for a kitchen or the like, but even if the surface of the MDF is smooth, Because of the softness and the difference in density, when the pressure is applied, the portion with low density is recessed, and the surface of the base material is uneven, which may impair the design of the appearance of the decorative molded product.

The present invention has been made in view of the above-mentioned present situation, and is a decorative molded product that is hardly affected by the roughness of the substrate surface and the material of the substrate, and that provides a decorative molded product with excellent surface smoothness. An object is to provide a manufacturing method.

The present inventors laminated the base material and the decorative film, and when performing vacuum / pressure forming to apply the decorative film to the base material by applying pressure in a vacuum state, the surface is smooth on the decorative film. Since it is possible to apply pressure uniformly to the surface of the decorative film by the resin plate surface by forming the resin plate having a predetermined elastic modulus at the molding temperature, The present invention has been completed by finding that a decorative molded product having excellent surface smoothness can be obtained regardless of the roughness and the material of the substrate.

The method for producing a decorative molded product of the present invention is a method for producing a decorative molded product in which a decorative film is attached to the surface of a base material, and the base material, the decorative film and the resin plate are arranged in this order. In a state of being stacked in a vacuum pressure-air forming process, and after the decoration process, the process of removing the resin plate placed on the decorative film affixed to the base material The resin plate has an arithmetic average roughness of a surface in contact with the decorative film of 0.1 μm or less, and an elastic modulus at a molding temperature of the vacuum / pressure forming of 30 MPa or more.

The resin plate preferably contains an acrylic resin.

The molding temperature of the vacuum / pressure forming is preferably 60 to 120 ° C.

The maximum height roughness of the decorative molded product after removing the resin plate is preferably 2.0 μm or less.

The decorative film preferably has a resin film containing polyvinyl chloride.

ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the decorative molded product which is hard to be influenced by the roughness of a base-material surface and the material of a base material, and can obtain the decorative molded product excellent in surface smoothness can be provided. .

It is a schematic diagram for demonstrating the decorating process which performs vacuum / pressure forming. It is a schematic diagram for demonstrating the decorating process which performs vacuum / pressure forming.

The method for producing a decorative molded product of the present invention is a method for producing a decorative molded product in which a decorative film is attached to the surface of a base material, and the base material, the decorative film and the resin plate are arranged in this order. In a state of being stacked in a vacuum pressure-air forming process, and after the decoration process, the process of removing the resin plate placed on the decorative film affixed to the base material The resin plate has an arithmetic average roughness of a surface in contact with the decorative film of 0.1 μm or less, and an elastic modulus at a molding temperature of the vacuum / pressure forming of 30 MPa or more.

The decoration process is performed by vacuum / pressure forming. Vacuum / pressure forming is a method in which a decorative film is adsorbed to a molded product while being pressurized under vacuum conditions, and can be performed using, for example, a vacuum / pressure forming apparatus. An example of vacuum / pressure forming will be described. First, a film and a molded product are set in a molding chamber under atmospheric pressure. Next, after the molding chamber is airtight, vacuum suction is performed using a vacuum tank, and the molding chamber is vacuumed. Subsequently, while maintaining the vacuum state, the film is heated to a desired temperature using a heater to soften the film. After bringing the molded product into contact with the softened film, the vacuum in the molding chamber is released to atmospheric pressure, and compressed air is introduced from the pressurized air tank into the molding chamber to press the film against the molded product. Paste along. Thereafter, the compressed air can be released and the decorative molded product can be taken out.

Below, the specific example of the decorating process of this invention is demonstrated using FIG.1 and FIG.2. FIG.1 and FIG.2 is a schematic diagram for demonstrating the decorating process which performs a vacuum pressure forming. A vacuum / pressure forming apparatus 100 shown in FIGS. 1 and 2 includes upper and lower forming chambers (upper forming chamber 110 and lower forming chamber 120). In these forming chambers, the surface of the substrate 10 is formed by vacuum / pressure forming. The decorative film 20 is laminated.

First, in a state where the upper molding chamber 110 is raised (not shown), the base material 10 is set on the table 130 in the lower molding chamber 120, and the decorative film 20 laminated on the base material 10 is placed on the upper surface of the lower molding chamber 120. set. Thereafter, the upper molding chamber 110 is lowered by the driving device 140, and the upper and lower molding chambers are respectively airtight (see FIG. 1A). Next, each of the upper and lower molding chambers is vacuumed from the vacuum tank 150 through the pipe 160 to be in a vacuum state (very low pressure state) (see FIG. 1B). Thereafter, the infrared heater 170 is turned on to heat the decorative film 20 (see FIG. 1C). As a result, the decorative film 20 is softened and can be attached along the surface shape of the substrate 10. Next, the table 130 in the lower molding chamber 120 is raised by the driving device 140, and the base material 10 is brought into contact with the softened decorative film 20 (see FIG. 2D). Subsequently, the vacuum on the upper molding chamber 110 side is released to an atmospheric pressure state (the inside of the lower molding chamber 120 is in a vacuum state), and further compressed air is put into the upper molding chamber 110 from the pressurized air tank 180, thereby decorating the film. 20 is pressed against the base material 10 and laminated along its shape (see FIG. 2 (e)). Thereby, the decorative film 20 is laminated on the surface of the substrate 10. The decorative film 20 may be laminated on the base material 10 while being stretched. Thereafter, the inside of the upper molding chamber 110 and the lower molding chamber 120 are returned to the atmospheric pressure state, the upper molding chamber 110 is raised, and the base material 10 covered with the decorative film 20 is taken out (see FIG. 2 (f)). . By using such a method, the base material 10 on which the decorative film 20 is attached can be obtained.

In the decoration process, vacuum / pressure forming is performed in a state where the base material 10, the decoration film 20, and the resin plate 30 are stacked in this order. The resin plate 30 is at least when the base material 10 and the decorative film 20 are brought into contact with each other (FIG. 2D) and when the decorative film 20 is pressed against the base material 10 (FIG. 2E). As long as it is piled up on the decorative film 20, as shown in FIG. 1 (a), it is piled up when the base material 10 and the decorative film 20 are carried into the vacuum / pressure forming apparatus. Also good.

In the decorating step, the decorative film is pressed on the surface by the weight of the resin plate by overlapping the resin plate on the decorative film. Thereby, even when a decorative film having high flexibility is used for the reason of following the curved shape of the base material, the uneven surface shape of the base material surface is prevented from appearing on the surface of the decorative molded product. It becomes possible. Therefore, irrespective of the surface roughness of the substrate, the surface smoothness of the resulting decorative molded product can be improved, and the design can be improved. Moreover, in the said decoration process, when a base material is pressurized, it can suppress that an unevenness | corrugation generate | occur | produces on the surface of a decorative molded product resulting from the density difference of a base material. Although the said resin board should just be arrange | positioned so that it may overlap with at least one part of a base material, it is preferable to arrange | position so that it may overlap with the whole area | region which wants to decorate a base material.

The resin plate is not a member provided in a vacuum / pneumatic forming apparatus, but is added separately in the decoration process. By introducing the resin plate, a decorative molded product having excellent smoothness can be produced without changing the specifications of the conventional vacuum / pressure forming apparatus. Moreover, it is preferable that the said resin board is heated with a base material and a decorating film by the heating for softening a decorating film in a decorating process, and is separately heated at the temperature different from the said molding temperature. Preferably not. Since the design property of the resin plate is impaired, it is preferable that a vacuum hole for removing air between the decorative film and the resin plate in vacuum / pressure forming is not provided.

The material of the resin plate is preferably higher in heat resistance than vinyl chloride suitable as a material for the decorative film, and examples thereof include acrylic resin, polycarbonate, and polyethylene terephthalate. Especially, it is more preferable that the said resin board contains an acrylic resin. Further, when heating is performed by a far infrared heater in the decoration step, the resin plate is preferably transparent and preferably not colored so as not to disturb the heating of the decoration film. Especially, it is more preferable that it is colorless and transparent.

The resin plate has an arithmetic average roughness of a surface in contact with the decorative film of 0.1 μm or less, and an elastic modulus at a molding temperature of the vacuum / pressure forming of 30 MPa or more. In the said decoration process, the surface shape of the surface which contact | connects the said decoration film of the said resin board is transcribe | transferred to a decoration film by overlapping a resin board on a decoration film. Therefore, it is important that the surface of the resin plate in contact with the decorative film is smooth. Further, it is important that the resin plate is not easily deformed at the molding temperature of vacuum / pressure forming and maintains a certain degree of hardness.

By setting the arithmetic average roughness (Ra) of the surface in contact with the decorative film of the resin plate to 0.1 μm or less, the surface of the resulting decorative molded product can be smoothed. If the Ra exceeds 0.1 μm, the smoothness of the surface of the decorative molded product obtained will be insufficient. A preferable upper limit of the Ra is 0.05 μm. The lower Ra is better, and the lower limit is not particularly limited, but is, for example, 0.005 μm. In this specification, “arithmetic mean roughness (Ra)” can be measured by a method based on JIS B 0601: 2001.

Since the elastic modulus at the molding temperature of the vacuum pressure forming of the resin plate is 30 MPa or more, the resin plate maintains a certain degree of hardness at the molding temperature. Can be smooth. Moreover, a base material can be protected from local pressurization and generation | occurrence | production of the unevenness | corrugation of the base material surface resulting from the density difference of a base material can be suppressed. When the elastic modulus is less than 30 MPa, the resin plate is deformed when the decorative film is heated and softened in vacuum / pressure forming, so that the surface of the decorative molded product cannot be smoothed. The occurrence of unevenness on the substrate surface cannot be suppressed. The elastic modulus refers to a 5% strain elastic modulus. In this specification, the “5% strain elastic modulus” can be measured by a method based on the ASTM standard (ASTM D-638).

The thickness of the resin plate is preferably 0.4 to 1.0 mm. If the thickness of the resin plate is less than 0.4 mm, the resin plate is likely to be deformed in vacuum / pressure forming, and the surface smoothness of the resulting decorative molded product may not be improved. On the other hand, when the thickness of the resin plate exceeds 1.0 mm, energy loss increases even when a transparent resin that hardly absorbs energy emitted by the far-infrared heater is used, and it takes time to heat the decorative film. There is a risk that it will take over or not fully heated.

The shape of the resin plate is not particularly limited, and can be a shape that matches the shape of the substrate. For example, in the case of imparting smoothness to the flat surface of the substrate, the resin plate may be flat, and in the case of imparting smoothness to the surface of the substrate having a curved surface, the resin plate is a substrate. It may be curved along the curved surface.

The molding temperature of the vacuum / pressure forming is preferably 60 to 120 ° C. By setting the molding temperature to 60 to 120 ° C., in particular, when the decorative film is a resin film containing polyvinyl chloride, the decorative film can be appropriately softened and processed. If the molding temperature is less than 60 ° C., the decorative film is not sufficiently softened, and the decorative film may not be attached along the shape of the molded product. On the other hand, when the molding temperature exceeds 120 ° C., the decorative film is excessively softened and the workability may be lowered. Moreover, when the said shaping | molding temperature is too high, there exists a possibility that the smoothness of the decorative molded product obtained by the said resin plate deform | transforming may fall. A more preferable lower limit of the molding temperature is 70 ° C, and a more preferable upper limit is 110 ° C. In addition, the heating of the said decoration film is not performed by making a resin plate contact. The decorative film is preferably heated by infrared rays such as far infrared rays.

In the method for producing a decorative molded product according to the present invention, the resin plate placed on the decorative film attached to the base material is removed after the decorative process. For example, the resin plate 30 may be taken out when the base material 10 covered with the decorative film 20 is taken out in FIG. The decorative molded product manufactured by the method for manufacturing a decorative molded product of the present invention has a decorative film attached to the surface of a base material.

The arithmetic average roughness (Ra) of the decorative molded product after removing the resin plate is preferably 60 μm or less. A more preferable upper limit of (Ra) is 40 μm. The Ra should be low, and the lower limit thereof is not particularly limited, but is 2 μm, for example.

The base material is not particularly limited, and includes, for example, bicycles, motorcycles and other motorcycles, automobiles, buses and other four-wheeled vehicles, building parts such as kitchens and washstands, etc .; tablet terminals, mobile phones And a cover of an electronic terminal such as a smartphone. The said base material may have a three-dimensional shape in the surface (decoration surface) on which a decorating film is affixed.

The arithmetic average roughness (Ra) of the surface on which the decorative film of the substrate is attached is preferably 0.2 μm or more and 0.8 μm or less. According to the method for producing a decorative molded product of the present invention, even if a decorative film is attached to a substrate having a rough surface as described above, the uneven shape of the substrate surface is on the surface of the decorative molded product. It can be prevented from appearing.

The density of the base material is preferably 0.35 g / cm ³ or more and 0.8 g / cm ³ or less. A more preferred upper limit of the density is 0.65 g / cm ^3, still more preferred upper limit is 0.45 g / cm ^3. According to the method for producing a decorative molded product of the present invention, vacuum / pressure forming can be performed even on a soft substrate as described above without generating irregularities on the surface of the decorative molded product.

Examples of the material of the substrate include resin, metal, and wood. The resin is not particularly limited. For example, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyvinyl alcohol, polyvinyl chloride, polyamide, polyacetal, polycarbonate, acrylonitrile / butadiene / styrene (ABS), ionomer resin, inorganic resins such as these Examples thereof include resin compositions to which various additives such as fibers are added. It does not specifically limit as said metal, For example, iron, aluminum, copper, SUS etc. are mentioned. Examples of the wood include a solid material, a laminated material formed of a plurality of plate materials, a molded plate formed of wood fibers, and the like. Examples of the molded board include a hard board (JIS A 5905), a medium density fiber board (MDF) (JIS A 5905), an insulation board (JIS A 5905), and a particle board (JIS A 5908). Can be mentioned.

The decorative film may be a single-layer resin film, a laminate of a plurality of resin films, or a laminate of a resin film and another layer. The resin film is not particularly limited as long as it is a stretchable film. Examples of the material for the resin film include polyvinyl chloride; polyolefins such as polyethylene, polypropylene, polybutene, and polybutadiene; polyurethanes; poly (meth) acrylic acid esters, and the like. It may be used in the form of a mixture of two or more.

Especially, it is preferable that the said decorative film has a resin film containing a polyvinyl chloride. Since polyvinyl chloride softens when heated, it is suitable as a material for a decorative film used for vacuum / pressure forming. In addition, since polyvinyl chloride has a good elongation when formed into a film and is not easily broken, a resin film containing polyvinyl chloride is suitable for application to a three-dimensional curved surface.

Examples of the polyvinyl chloride include a homopolymer of vinyl chloride and a copolymer of vinyl chloride and other monomers. Examples of the other monomer include vinyl esters such as vinyl acetate and vinyl propionate; olefins such as ethylene, propylene and styrene; (meth) acrylic acid esters such as methyl acrylate, ethyl acrylate and methyl methacrylate. Maleic acid diesters such as dibutyl maleate and diethyl maleate; fumaric acid diesters such as dibutyl fumarate and diethyl fumarate; vinyl cyanides such as acrylonitrile and methacrylonitrile; vinyl halides such as vinylidene chloride and vinyl bromide; Examples thereof include vinyl ethers such as methyl vinyl ether and ethyl vinyl ether. These may be used alone or in combination of two or more.

The content of the other monomer in the copolymer is usually 50% by weight or less, preferably 10% by weight or less. Among the polyvinyl chlorides, a homopolymer of vinyl chloride is preferable from the viewpoint of obtaining dimensional stability.

The average degree of polymerization of the polyvinyl chloride is not particularly limited, and is adjusted according to the required film hardness and the amount of plasticizer used for adjusting the hardness, and the average degree of polymerization of the polyvinyl chloride. Is preferably 800-1200. By setting it as such an aspect, workability can be improved. In the present specification, the average degree of polymerization of polyvinyl chloride means the average degree of polymerization measured in accordance with JIS K6721 “Testing methods for vinyl chloride resin”.

The resin film may contain a plasticizer in addition to polyvinyl chloride. Specific examples of the plasticizer include phthalic acid diesters such as octyl phthalate (di-2-ethylhexyl phthalate (DOP)), dibutyl phthalate, dinonyl phthalate, diisononyl phthalate (DINP), and the like; cyclohexane dicarboxylic acid ester , Aliphatic dibasic acid diesters such as dioctyl adipate and dioctyl sebacate; phosphate triesters such as tricresyl phosphate and trioctyl phosphate; epoxy plasticizers such as epoxidized soybean oil and epoxy resins; Agents and the like.

Examples of the polymer polyester plasticizer include polyalkylene glycol diesters such as polyethylene glycol diester, polypropylene glycol diester, and polyethylene glycol polypropylene glycol diester of phthalic acid; polyethylene glycol diesters of aliphatic dibasic acids such as adipic acid and sebacic acid. Polyalkylene glycol diesters such as polypropylene glycol diester and polyethylene glycol polypropylene glycol diester; These may be used alone or in combination of two or more.

The blending amount of the plasticizer is preferably 5 parts by weight or more and 30 parts by weight or less with respect to 100 parts by weight of the polyvinyl chloride.

The resin film can be produced using calendar molding. Here, calendar molding refers to a method of rolling and molding a raw material resin with a pair of rolls. Examples of the calendar format used for the calendar molding include an inverted L shape, a Z shape, an upright two shape, an L shape, and an inclined three shape.

The decorative film may have an adhesive layer on the side to be bonded to the base of the resin film. By having the said adhesive layer, the adhesiveness of a decorating film and a base material can be improved more. The type of the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include an acrylic pressure-sensitive adhesive layer, a polyester-based pressure-sensitive adhesive layer, a urethane-based pressure-sensitive adhesive layer, a rubber-based pressure-sensitive adhesive layer, and a silicone-based pressure-sensitive adhesive layer. Can be mentioned.

The pressure-sensitive adhesive layer may be a layer made of a hot-melt adhesive (hot-melt pressure-sensitive adhesive layer). Since the hot-melt pressure-sensitive adhesive layer does not contain a solvent, it is suitably used when a decorative film is laminated by vacuum / pressure forming. Examples of the hot-melt pressure-sensitive adhesive layer include a polyester-based hot-melt pressure-sensitive adhesive layer, an acrylic-based hot-melt pressure-sensitive adhesive layer, a rubber-based hot-melt pressure-sensitive adhesive layer, and a silicone-based hot-melt pressure-sensitive adhesive layer. An acrylic hot melt pressure-sensitive adhesive layer is preferred.

The resin film may be a colored film, or may be printed on the surface. The decorative film may have a design layer on which a pattern is printed with ink or the like. Furthermore, the decorative film may have an overcoat layer that protects the design on the outermost surface.

The decorative film preferably has an elongation rate at 100 ° C. of 200% or more. If the expansion ratio is 200% or more, it is suitable for attachment to a three-dimensional curved surface. The upper limit of the expansion rate is not particularly limited, but is 400%, for example. The elongation rate can be obtained from the following equation by performing a tensile test using a tensile tester in accordance with JIS K 7162. In the following formula, La is the length of the test piece before the tensile test is performed, and Lb is the length of the test piece when the test piece is broken in the tensile test.
Elongation rate (%) = {(Lb−La) / La} × 100

EXAMPLES Hereinafter, although an Example is hung up and demonstrated in more detail about this invention, this invention is not limited only to these Examples.

Example 1
8 parts by weight of diisononyl phthalate (DINP) was added to 100 parts by weight of polyvinyl chloride having an average degree of polymerization of 800, melt-kneaded with a Banbury mixer, and then a PVC film having a thickness of 0.15 mm was prepared by calendering. . Two sheets of the above PVC film were laminated by heat lamination to produce a decorative film having a thickness of 0.3 mm.

A flat medium density fiber board (MDF) (density: 0.55 g / cm ³ ) having a length of 150 mm, a width of 150 mm, and a thickness of 18 mm was prepared as a substrate, and the flat plate shape shown in Table 1 below was used as a resin board. A resin plate A made of acrylic resin was prepared.

The decorative film obtained above and the resin plate A were layered in this order on the MDF, and vacuum / pressure forming was performed at a molding temperature of 80 ° C. The vacuum / pressure forming was performed using a TOM molding machine (NGF-0406-T) manufactured by Fuse Vacuum Co., Ltd.

(Example 2)
In vacuum / pressure forming, the same base material and decorative film as in Example 1 were used except that the flat acrylic resin plate B shown in Table 1 below was used as the resin plate. Similarly, vacuum / pressure forming was performed to produce a decorative molded product.

(Comparative Example 1)
Except that the resin plate was not used in the vacuum / pressure forming, the same substrate and decorative film as in Example 1 were used, and vacuum / pressure forming was performed in the same manner as in Example 1 to produce a decorative molded product.

(Comparative Example 2)
In vacuum / pressure forming, the same base material and decorative film as in Example 1 were used except that a flat-plate polyvinyl chloride (PVC) resin plate C shown in Table 1 below was used as the resin plate. In the same manner as in Example 1, vacuum-compression molding was performed to produce a decorative molded product.

(Comparative Example 3)
In vacuum / pressure forming, the same base material and decorative film as in Example 1 were used, except that a flat stainless steel plate D shown in Table 1 below was used instead of the resin plate. Vacuum-pressure forming was performed to produce a decorative molded product.

As surface properties of the resin plates A to C and the stainless steel plate D, arithmetic average roughness (Ra) and elastic modulus (5% strain elastic modulus) were measured by the following methods. The results are summarized in Table 1 below.

The arithmetic average roughness (Ra) was measured under the following measurement conditions by a method based on JIS B 0601: 2001.
(Measurement condition)
Curve: R
Filter: GAUSS
Cut-off value λc: 0.8 mm
Cut-off value λs: 25 μm
Number of sections: 15mm
Run-up: Before and after Measurement speed: 0.5 mm / sec

The elastic modulus (5% strain elastic modulus) was measured under the following measurement conditions by a method based on the ASTM standard (ASTM D-638).
(Measurement conditions of elastic modulus)
Test speed: 5 mm / min Sample length: 150 mm
Sample width: 20mm
Distance between marked lines: 50 mm
Initial distance between chucks: 100mm ± 5mm

As a surface property of the surface to which the decorative film of the base material (MDF) before the decorative molding obtained in the above examples and comparative examples is attached, Ra is the same method as the above resin plate Measured with For each, Ra was measured at any three points. The results are summarized in Table 2 below.

In the decorating step, an example using an acrylic resin resin plate having an arithmetic average roughness of a surface in contact with the decorating film of 0.1 μm or less and an elastic modulus at a molding temperature of vacuum pressure forming of 30 MPa or more. In 1 and 2, the surface of the decorative molded product was smooth, and the dent of the base material was not confirmed.

On the other hand, in Comparative Example 1 in which the resin plate was not used in the decoration process, Ra was reduced as compared with the base material (MDF) before the decoration molding, but the surface smoothness was insufficient and the MDF A dent due to the density difference was confirmed. Further, Comparative Example 2 using a PVC resin plate in which the arithmetic average roughness of the surface in contact with the decorative film is larger than 0.1 μm and the elastic modulus at the molding temperature in vacuum / pressure forming is 30 MPa or less, In Comparative Example 3 using a stainless steel plate having an arithmetic average roughness of the surface in contact with the decorative film larger than 0.1 μm, the effect of reducing Ra as compared with the base material before the decorative molding was not obtained.

10: Base material (molded product)
20: Decorative film 30: Resin plate 100: Vacuum / pressure forming device 110: Upper forming chamber 120: Lower forming chamber 130: Table 140: Drive device 150: Vacuum tank 160: Piping 170: Infrared heater 180: Pressured air tank

Claims (5)

A method for manufacturing a decorative molded product in which a decorative film is attached to the surface of a substrate,
In a state where the base material, the decorative film and the resin plate are stacked in this order, a decoration process for performing vacuum / pressure forming,
And after the decoration step, removing the resin plate placed on the decorative film affixed to the base material,
The resin plate has an arithmetic average roughness of a surface in contact with the decorative film of 0.1 μm or less, and an elastic modulus at a molding temperature of the vacuum / pressure forming of 30 MPa or more. Production method. The method for producing a decorative molded product according to claim 1, wherein the resin plate contains an acrylic resin. The method for producing a decorative molded product according to claim 1 or 2, wherein a molding temperature of the vacuum / pressure forming is 60 to 120 ° C. The method for producing a decorative molded product according to any one of claims 1 to 3, wherein a maximum height roughness of the decorative molded product after removing the resin plate is 2.0 µm or less. . The said decorative film has a resin film containing a polyvinyl chloride, The manufacturing method of the decorative molded product in any one of Claims 1-4 characterized by the above-mentioned.

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