JPH11277708A - Decorative sheet with protecting film and decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet with a protecting film which enables the protecting film to be tightly attached to the decorative sheet stably and the protecting sheet to be surely released from the decorative sheet, and also to provide a decorative material with the protecting film for protecting against a scratch which can be released. SOLUTION: A protecting film 7 has a coarse face 6 formed physically on at least, the face which comes into close contact with a decorative sheet 2 and also has at least, the face which comes into close contact with the decorative sheet 2, formed of a material which hardly generates a chemical bond with the decorative sheet 2. This protecting film 7 is attached under pressure to the decorative sheet 2 to obtain a decorative sheet 1 with the protecting film 7 composed of said film 7 laminated on at least, part of the decorative sheet 2 in a freely peelable manner. Further, the decorative sheet 1 with the protecting film 7 is laminated on at least, part of a resin molding in such a manner that the decorative sheet 2 side is integrally fused to the resin molding to obtain the decorative material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet with a protective film and a decorative material, and more particularly to a decorative sheet with a protective film having excellent adhesion and peelability of the protective film to the decorative sheet, and a peelable sheet for preventing damage. The present invention relates to a decorative material provided with a protective film.

[0002]

2. Description of the Related Art Conventionally, a decorative sheet on which a pattern is printed is fused and integrated with a resin molded product to produce a decorative material (Japanese Patent Publication No. 50-19132, Japanese Patent Application Laid-Open No. H05-19532).
24166). As a decorative sheet used for this purpose, there are a decorative sheet in which a desired pattern is printed on a flexible base film such as polyvinyl chloride, and a decorative sheet in which a transparent resin layer is further laminated on the pattern.

In a decorative material provided with such a decorative sheet, in order to prevent the surface of the decorative sheet from being damaged during a manufacturing stage or a transport stage, a protective film is provided on the decorative sheet surface in a releasable manner. ing. When the protective film is provided in this manner, (1) a method of temporarily bonding the protective film to the surface of the decorative sheet by electrostatic force, heat fusion, or the like after forming the decorative material, and (2) a decorative sheet using an electrostatic force or an adhesive in advance. There is a method in which a decorative sheet with a protective film, in which a protective film is temporarily adhered to the design surface, is used, and the above-mentioned decorative sheet with a protective film is fused and integrated simultaneously with the formation of the resin molded article.

[0004]

However, in the case of the above (1), after the decorative sheet is fused and integrated with the resin molded article to form the decorative material, the decorative sheet is applied to the decorative sheet before the protective film is temporarily bonded. There has been a problem that scratches occur and temporary adhesion of the protective film becomes difficult depending on the shape of the decorative material.

[0005] In the case of the above (2), it is difficult to adjust the adhesive strength (peeling strength) of the protective film on the decorative sheet temporarily by electrostatic force.
There has been a problem that the shearing stress acting on the interface between the protective film and the decorative sheet causes the interface peeling between the protective film and the decorative sheet. On the other hand, when the protective film is temporarily bonded to the decorative sheet using an adhesive, by setting the adhesive force of the adhesive to be used appropriately, the protective film and the decorative sheet at the time of molding the resin molded article as described above. Separation at the interface can be prevented. However, when the cosmetic material is used, the protective film does not peel off cleanly, and the adhesive remains on the decorative material (the surface of the decorative sheet), and furthermore, the adhesive and the decorative sheet are chemically bonded to each other. There was a problem that peeling could not be performed.

[0006] The present invention has been made in view of the above circumstances, and a decorative sheet with a protective film such that the protective film stably adheres to the decorative sheet and can be reliably peeled off from the decorative sheet. An object of the present invention is to provide a decorative material provided with a protective film for preventing scratches in a detachable manner.

[0007]

In order to achieve the above object, a decorative sheet with a protective film according to the present invention comprises a decorative sheet with a protective film in which a protective film is detachably attached to at least a part of the decorative sheet. A protective film formed of a material that is provided with a physically rough surface at least on a surface that is in close contact with the decorative sheet, and that is at least a surface that is in close contact with the decorative sheet and that does not chemically bond to the decorative sheet. , And a decorative sheet.

Further, the decorative sheet with a protective film of the present invention has a structure in which the rough surface has irregularities such that the surface roughness based on a 10-point average roughness of JIS-B-0601 is in the range of 1 to 100 μm. The rough surface has a surface roughness of 100 to 1000 μm based on 10-point average roughness of JIS-B-0601.
Was formed so as to partially have irregularities in the range of

[0009] The decorative material of the present invention comprises a resin molded article and a decorative sheet with a protective film provided on at least a part of the resin molded article. The decorative sheet with a film was configured such that the decorative sheet side was fused and integrated with the resin molded body.

In the present invention, the rough surface of the protective film pressed on the decorative sheet has an anchoring effect on the decorative sheet, and the protective film is stably detachably mounted on the decorative sheet. The protective film has a protective effect on the surface, and the protective film is reliably peeled from the decorative sheet at the time of peeling.

[0011]

Next, an embodiment of the present invention will be described. (Cosmetic Sheet with Protective Film) FIG. 1 is a schematic sectional view showing one embodiment of a decorative sheet with a protective film of the present invention. In FIG. 1, decorative sheet 1 with a protective film
Comprises a decorative sheet 2 and a protective film 7 detachably attached to a design surface of the decorative sheet 2. The decorative sheet 2 includes a base film 3 and the base film 3
It has a pattern layer 4 formed thereon, and a transparent protective layer 5 laminated on the base film 3 so as to cover the pattern layer 4.

The base film 3 of the decorative sheet 2 constituting the decorative sheet 1 with the protective film has a high adhesiveness to the picture layer 4 and the transparent resin layer 5 and a resin of a decorative material described later. There is no particular limitation as long as it has a heat-fusing property with respect to the molded body. Specifically, a single material such as a vinyl chloride resin film, a polyethylene resin film, a polypropylene resin film, a polystyrene resin film, an ABS resin film, a polyamide resin film, an acrylic resin film, a polyester resin film, a cellulose resin film, or a laminate From among the materials,
The thickness can be appropriately determined in consideration of the thickness, transparency, coloring degree, thermal stretchability, and the like.

The thickness of the base film 3 is 50 to 50.
It can be appropriately set in the range of 500 μm in consideration of the material, strength and the like. The base film 3 can be subjected to a corona discharge treatment as needed. By this corona discharge treatment, the adhesive strength between the picture layer 4 and the transparent resin layer 5 can be further improved.

The picture layer 4 is formed by adding a coloring agent such as a pigment and a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, an ultraviolet absorber, a light stabilizer and the like to the vehicle as needed. It can be formed using a mixture.
There is no particular limitation on the ink used, and any ink used for forming a picture layer in a conventional decorative sheet can be used. Printability, weather resistance, adhesion to the base film 3 and the transparent protective layer 5 can be used. It can be appropriately selected in consideration of properties and the like.

As the vehicle constituting the ink, known thermoplastic resins, thermosetting resins, and ionizing radiation-curable resins can be used. As the thermoplastic resin, a cellulose derivative, a styrene resin, a styrene copolymer, an acrylic resin, a vinyl copolymer, a rosin ester resin, a coumarone resin, a vinyl toluene resin, a polyamide resin, or the like can be used. Further, as the thermosetting resin, phenol resin, urea resin, diacryl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, amino alkyd resin, melamine-urea co-condensation resin, Silicon resin, polysiloxane resin, or the like can be used. As the ionizing radiation-curable resin, an ultraviolet or electron beam-curable resin can be used.For example, acrylates such as urethane acrylate, epoxy acrylate, silicon acrylate, siloxane, unsaturated polyester, etc. It is preferable to use a monomer having a polyfunctional monomer having a polymerizable unsaturated bond such as an acryloyl group as a main component or a prepolymer having a high crosslinking density. When irradiating ultraviolet rays to cure such an ionizing radiation-curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, α-aminoxime ester, tetramethylthiuram monosulfide, thioxanthone are used as photopolymerization initiators. Kind,
As a photopolymerization accelerator (sensitizer), n-butylamine, triethylamine, tri-n-butylphosphine, or the like can be mixed and used.

The transparent protective layer 5 of the decorative sheet 2 constituting the decorative sheet 1 with the protective film is formed by laminating a colored or colorless transparent synthetic resin film on the base film 3 so as to cover the picture layer 4, It can be formed by applying a colorless transparent synthetic resin paint with a gravure roll coater, curtain flow coater or the like. The transparent synthetic resin to be used is appropriately selected according to the required surface properties, but particularly when wear resistance and stain resistance are required,
Ionizing radiation-curable resin composed of urethane acrylate, polyester acrylate, epoxy acrylate, etc.
Thermosetting resins such as epoxy, polyurethane and polysiloxane, and fluororesins such as polytetrafluoroethylene and polyvinylidene fluoride can be used. When weather resistance is required, a fluororesin such as polytetrafluoroethylene and polyvinylidene fluoride, an acrylic resin such as polymethyl methacrylate, a polysiloxane resin, and the like can be used. The thickness of such a transparent protective layer 5 is 50 to 500 μm.
It can be set appropriately within the range of m.

The protective film 7 constituting the decorative sheet 1 with the protective film has at least a surface which is in close contact with the decorative sheet 2 and has a rough surface 8 which is physically formed. This is a protective film formed of a material that is unlikely to be bonded. In the illustrated example, the protective film 7
Since the protective film 7 comes into contact with the transparent protective layer 5 of the decorative sheet 2, a protective film 7 formed of a material that is hardly chemically bonded to the transparent protective layer 5 is used.

There is no particular limitation on the protective film 7 as long as it can withstand the heat applied during fusion bonding with a resin molded body described later. Usually, from the viewpoint of moldability, polyester resin films such as polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate isophthalate copolymer, etc .; Among the resin films, a material (a material having no adhesiveness or compatibility) that is hardly chemically bonded to the decorative sheet 2 is used. The thickness of the protective film 7 depends on the design surface (the transparent protective layer in FIG. 1) of the decorative sheet 2 due to an external force applied during the production and processing of the decorative sheet 1 with the protective film and during the production and transportation of the decorative material described later. (The surface of No. 5) must have such a thickness as to have a protective action so as not to be damaged, and is preferably as thin as possible in terms of cost. Usually, the thickness of the protective film 7 is preferably set in the range of 10 to 120 μm in consideration of workability and the like.

FIG. 2 is a view showing various aspects of the rough surface 8 of the protective film 7. In FIG. 2, as an example of the rough surface 8,
The protective film 7 is formed by forming concave and convex portions 8a on the protective film 7 (FIG. 2A), and the protective film 7 is formed by forming fine convex portions 8b on the protective film 7 (FIG. 2A).
(B)), a projection formed by forming fine projections 8c and slightly large projections 8c 'on the protection film 7 (FIG. 2 (C)). The projections and depressions formed by forming the fine projections 8d (FIG. 2)
(D)).

The rough surface 8 composed of the fine concave portions 8a shown in FIG. 2A can be provided by etching the protective film 7 by sandblasting or the like to form the fine concave portions 8a. The concavities and convexities formed by the concave portions 8a are JIS
-B-0601 having a surface roughness of 1 to 10 point average roughness
It is set to be in the range of 100 μm. When the surface roughness of the unevenness is less than 1 μm, the adhesive strength between the protective film 7 and the decorative sheet 2 when pressed against the decorative sheet 2 is reduced, and the protective film 7 and the decorative sheet are formed at the time of molding a resin molded body described later. The interface between the protective film 7 and the decorative sheet 2 is separated by the shear stress acting on the interface with the decorative sheet 2. Further, if the surface roughness of the irregularities exceeds 100 μm, the adhesive strength between the protective film 7 and the decorative sheet 2 becomes too high when pressed against the decorative sheet 2, and the protective film is peeled off when using a decorative material as described later. However, it is slightly difficult and is not preferable. The shape and density of the concave portion 8a are within the range where the surface roughness is in the range of 1 to 100 μm as described above, and the peel strength between the protective film 7 and the decorative sheet 2 (peeling speed 100 mm)
/ Peeling strength at 90 ° peeling per minute) is 50 to 300.
It can be set appropriately so as to be about g / inch. As described above, the rough surface 8 composed of the concave and convex portions formed of the fine concave portions 8a serves as an anchoring function for detachably attaching the protective film 7 to the decorative sheet 2 and peels the protective film 7 from the decorative sheet 2. Sometimes, it also has the effect of matting the design surface of the decorative sheet 2.

The rough surface 8 composed of the fine projections 8b shown in FIG. 2B is obtained by forming the fine projections 8b on the surface of the protective film 7 using an ionizing radiation curable resin or a thermosetting resin. Can be provided. The irregularities formed by the convex portions 8b are also set such that the surface roughness based on the 10-point average roughness of JIS-B-0601 is in the range of 1 to 100 μm as described above. The shape and the formation density of the projections 8b are within the range where the surface roughness is 1 to 100 μm as described above.
The peel strength between the protective film 7 and the decorative sheet 2 (peel strength at 90 ° peel at a peel speed of 100 mm / min) is 5
It can be appropriately set so as to be about 0 to 300 g / inch. As described above, the rough surface 8 composed of the unevenness composed of the fine projections 8b is used to cover the protective film 7 with the decorative sheet 2.
In addition to the anchoring function of detachably attaching the decorative film to the decorative sheet 2, when the protective film 7 is peeled from the decorative sheet 2, the decorative surface of the decorative sheet 2 is matted.

The rough surface 8 shown in FIG. 2C is obtained by forming fine convex portions 8c and slightly large convex portions 8c 'on the surface of the protective film 7 using an ionizing radiation curable resin or a thermosetting resin. Can be provided. As described above, the irregularities formed by the fine projections 8c also conform to JIS-B-0601-1.
It is set so that the surface roughness based on the zero point average roughness is in the range of 1 to 100 μm. Of the rough surface 8, the rough surface composed of the irregularities composed of such fine projections 8 b serves as an anchoring action for detachably attaching the protective film 7 to the decorative sheet 2, and the protective film 7 is provided with a decorative film. When peeled from the sheet 2, the decorative sheet 2 has an effect of matting the design surface. The somewhat large convex portion 8c 'is intended to perform various embossing processes such as wood grain, leather tone, and geometric pattern on the design surface of the decorative sheet 2, and is JIS-B-0601. Is set so that the surface roughness based on the 10-point average roughness is in the range of 100 to 1000 μm. The shape and the formation density of the fine projections 8c and the slightly large projections 8c 'are such that the surface roughness is within the above range, and the peel strength between the protective film 7 and the decorative sheet 2 (at a peeling speed of 100 mm / min). The peel strength at 90 ° peeling) can be appropriately set so as to be about 50 to 300 g / inch.

The rough surface 8 in FIG. 2D can be provided by forming fine projections 8d in a plurality of regions on the surface of the protective film 7 using an ionizing radiation curable resin or a thermosetting resin. it can. The irregularities formed by the convex portions 8d are also set such that the surface roughness based on the 10-point average roughness of JIS-B-0601 is in the range of 1 to 100 μm as described above. Further, the number of the regions where the convex portions 8d are provided to form the uneven rough surface, the occupancy ratio of the rough surface region occupying the surface of the protective film 7, the shape and the forming density of the convex portions 8d are as follows.
Within the range of 100 μm, the peeling strength between the protective film 7 and the decorative sheet 2 (90 ° at a peeling speed of 100 mm / min)
(Peeling strength in peeling) can be appropriately set so as to be about 50 to 300 g / inch. As described above, the rough surface 8 composed of the irregularities composed of the fine projections 8d serves as an anchoring function for detachably attaching the protective film 7 to the decorative sheet 2 and also allows the protective film 7 to be attached to the decorative sheet 2.
When peeled from the decorative sheet 2, the corresponding area of the design surface of the decorative sheet 2 is matted.

The slightly rough projections 8c 'shown in FIG. 2C are formed on the rough surface 8 composed of the fine recesses 8a shown in FIG.
2D may be formed on the rough surface 8 composed of the fine projections 8d of FIG. 2D, and a projection such as a slightly larger projection 8c 'shown in FIG. 2C. A part may be formed.

The ionizing radiation curable resin or the thermosetting resin for forming the projections 8b, 8c, 8c ', 8d on the surface of the protective film 7 as described above is mentioned in the description of the decorative sheet 2 described above. From the ionizing radiation-curable resin and the thermosetting resin, a material (a material having no adhesive property or compatibility) that is hardly chemically bonded to the decorative sheet 2 can be selected and used. The projections 8b, 8c, 8c ', and 8d are formed on the surface of the protective film 7 by using an ink obtained by appropriately mixing an additive with an ionizing radiation-curable resin or a thermosetting resin as necessary. Print and then
It can be performed by curing.

As the stencil printing on the protective film 7,
For example, JP-A-57-87318, JP-B-57-22
755, JP-B-63-50066, JP-A-7-32
476 can be used. That is, (1) the surface has the same shape as the target unevenness,
In addition, a cylindrical plate cylinder provided with the concavo-convex shape of the reverse concavo-convex is prepared and rotated around the axis, and (2) the long strip-shaped protective film 7 is rotated at the same speed as the peripheral speed of the plate cylinder. Supply,
(3) The plate cylinder and the protective film 7 are overlapped and adhered to each other with an ink containing an ionizing radiation-curable resin therebetween (at this time, the concave portion of the plate cylinder is filled with the ink). In this state, ionizing radiation is irradiated to crosslink and cure the ink, and (5) the protective film 7 on which the fine projections are formed is peeled off from the plate cylinder and removed.

The plate cylinder of the above (1) is usually made of iron,
A metal such as copper is used. When ionizing radiation is applied to the ink from the inside of the plate cylinder in (4), a plate cylinder made of a transparent material such as glass or quartz is used. Also, (3)
In order to obtain a close contact state through the ink, a method of applying the ink on the supplied protective film 7, a method of applying the ink on the plate cylinder, and applying the ink on the supplied protective film 7 and the plate cylinder Any method of coating may be used. Furthermore, the irradiation of the ink with ionizing radiation in (4)
As described above, any of a method performed from the inside of the transparent plate cylinder and a method in which a film transparent to ionizing radiation is selected as the protective film 7 and irradiated from the protective film 7 side may be used.

The ionizing radiation is an electromagnetic wave or a charged particle beam having energy quanta capable of polymerizing and crosslinking molecules, such as ultraviolet rays, visible rays, X-rays, electron beams, α rays, and the like.
Although there are rays and the like, ultraviolet rays and electron beams are usually used. As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a black light lamp, and a metal halide lamp can be used. Further, as the electron beam source, various electron beam accelerators such as Cockloft-Walton type, Bande graph type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, and high frequency type can be used. 100-1000ke
An electron beam having an energy of V, preferably 100 to 300 keV is irradiated.

In the above embodiment, the decorative sheet 2 is composed of the base film 3, the picture layer 4 and the transparent protective layer 5, but the decorative sheet constituting the decorative sheet with the protective film of the present invention is the However, the present invention is not limited to this. FIG. 3 is a view showing another embodiment of the decorative sheet. The decorative sheet 2 is a decorative sheet 2 having a pattern layer 4 provided on a base film 3 (FIG. 3A), and a base film 3. A decorative sheet 2 (FIG. 3 (B)) in which a pattern layer 4 is provided on the back surface (a transparent protective layer 5 is provided if necessary), and a protective film 7 is removably mounted on the front side of the base film 3. ))
And so on. And in each case,
As the protective film 7, at least a surface that is in close contact with the decorative sheet 2 has a physically formed rough surface 8, and this surface is formed of a material that is hardly chemically bonded to the decorative sheet 2. Use film.

The protective film 7 having the rough surface 8 as described above
For example, as shown in FIG. 4, the rough surface 8 of the protective film 7 is brought into contact with the design surface of the softened decorative sheet 2 by heating and softening, and the pressure is applied by a roller. Pressing can be performed. Thereby, the convex part of the rough surface 8 of the protective film 7 bites into the decorative sheet 2, and the decorative sheet with the protective film of the present invention in which the protective film is detachably mounted can be obtained. (Cosmetic Material) FIG. 5 is a perspective view showing an embodiment of the cosmetic material of the present invention, and FIG. 6 is a sectional view of the cosmetic material shown in FIG. 5 and 6, the decorative material 11 includes a resin molded body 12 having a predetermined shape and the decorative sheet 1 with a protective film of the present invention integrally provided on the surface of the resin molded body. In the decorative material 11, the design surface of the decorative sheet 2 is reliably protected from external force in a manufacturing stage, a transportation stage, and the like by the protective film 7, and when the decorative material 11 is used, the protective film 7 is easily and reliably peeled off. The decorative sheet 2 can be removed, and a beautiful design surface of the decorative sheet 2 can be obtained.

The decorative material 11 of the present invention can be manufactured by simultaneously forming the resin molded body 12 and fusing and integrating the decorative sheet 1 with the protective film on the surface thereof on the decorative sheet 2 side. . FIG. 7 is a view for explaining a method of manufacturing such a decorative material 11. First, as shown in FIG. 7A, the female mold 2 for injection molding is used.
The decorative sheet 1 with a protective film is placed on the inner surface of the base 1 so that the protective film 7 side is in contact with the mold. Then, the decorative sheet 1 with the protective film is heated and softened, and is brought into close contact with the inner surface of the female mold 21 for injection molding. In this case, a vacuum suction hole is provided in the female mold 21 for injection molding,
The decorative sheet 1 with the protective film may be brought into close contact with the inner surface of the female mold 21 for injection molding by the suction force of the vacuum suction holes.

Next, as shown in FIG. 7 (B), the female mold 21 for injection molding in which the decorative sheet 1 with the protective film 1 is closely adhered to the inner surface is closed with the male mold 22 for injection molding. The molten synthetic resin is pressed into the space 24 between the molds through the injection path 23 of the mold 22. Thereby, the resin molding 1
2 is molded, and the molten synthetic resin and the decorative sheet 2 of the decorative sheet 1 with the protective film are fused and integrated. Then, after cooling and solidifying, the male mold 22 for injection molding is opened, the resin molded body 12 is taken out, and finishing is performed, whereby the decorative material 11 is obtained.

In such a series of manufacturing steps, even if a shear stress acts on the interface between the protective film 7 and the decorative sheet 2 constituting the decorative sheet 1 with the protective film, the protective film 7 pressed against the decorative sheet 2 Since the protective film 7 is stably and detachably attached to the decorative sheet 2 by the anchoring effect on the decorative sheet 2 by the rough surface 8 of the surface, the interface peeling occurs between the protective film 7 and the decorative sheet 2. Is prevented.

As the molten synthetic resin for molding the resin molded body 12, a general synthetic resin used for injection molding may be used. For example, polystyrene resin, ABS resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, acrylic resin, A polyamide resin, a cellulosic resin, a polyurethane resin, and the like, and foams thereof can be appropriately selected in consideration of the required physical properties of the resin molded body 12, the physical properties of the decorative sheet 2 to be integrated, and the like.

[0035]

Next, the present invention will be described in more detail with reference to examples. (Example 1) Preparation of a decorative sheet with a protective film First, as a base film, a polyvinyl chloride resin film having a thickness of 80 µm (Vinivan manufactured by Bando Chemical Co., Ltd.)
Was prepared, and a grain pattern was printed on one surface of the surface by gravure printing using a pattern layer ink. As a result, FIG.
A decorative sheet having a configuration as shown in (A) was obtained. still,
The ink for the picture layer is a mixed binder of a vinyl chloride-vinyl acetate copolymer and an acrylic resin (mixing ratio = 1: 1).
An ink containing quinacridone red, isoindolinone yellow, and carbon black as pigments was used.

Next, a polyethylene terephthalate film (Lumimat Torres (38 μm thick) manufactured by Panac Co., Ltd.) having one surface subjected to sandblasting was prepared as a protective film. JIS-B-0601-1 on the sandblasted surface (rough surface) of this protective film
The surface roughness based on the zero point average roughness was 1 μm. This surface roughness measurement is performed using a surface roughness meter (SE, manufactured by Kosaka Laboratory Co., Ltd.)
-30K).

Then, immediately after the decorative sheet was heated to 80 ° C. and softened, the protective film was overlaid so that the sandblasted surface (rough surface) of the protective film was in contact with the decorative sheet, and the metal roller was heated to 80 ° C. To obtain a decorative sheet with a protective film of the present invention (Sample 1). The peel strength between the protective film and the decorative sheet of the decorative sheet with the protective film (Sample 1) was measured by 90 ° peeling at a peeling speed of 100 mm / min using a tensile tester (RTC-1250A manufactured by Orientec Co., Ltd.). The result was 50 g / inch.

A polyethylene terephthalate film (38 μm thick) having one surface subjected to sandblast treatment to form a rough surface having a surface roughness of 10 μm according to JIS-B-0601 10-point average roughness is used as a protective film. A decorative sheet with a protective film (Sample 2) was obtained in the same manner as in Sample 1 except for using. The peel strength of the decorative sheet with the protective film (sample 2) between the protective film and the decorative sheet was measured using a tensile tester (RTC-1250A manufactured by Orientec Co., Ltd.) at a peeling rate of 100 mm /
It was 80 g / inch as measured by 90 ° peeling per minute.

Further, one side is sandblasted.
Table of 10 points average roughness of JIS-B-0601
Polyethylene having a rough surface with a surface roughness of 0.5 μm
Protect film for terephthalate film (38μm thick)
Except that it was used as a sample
A decorative sheet with a film (sample 3) was obtained. This protection
Protective film and makeup for decorative sheet with film (Sample 3)
Peeling strength between sheet and tensile tester (Oriente Co., Ltd.)
Peeling speed 100m using RTC-1250A)
As a result of measuring by 90 ° peeling at m / min, 7 g / a
It was an inch. Production of cosmetic materials Each of the decorative sheets with protective films described above (samples 1 to 3)
A cosmetic material was prepared using the same. This is first injection for vacuum molding
The protective film side is brought into contact with the mold on the inner surface of the molded female mold
Place the decorative sheet with the protective film
Heat the decorative sheet with protective film to 100 ° C to soften it
And suction through the vacuum suction hole of the injection-molded female mold for vacuum molding.
To make the decorative sheet with the protective film adhere to the inner surface of the mold.
Was.

Next, the male mold is closed, and a melt (180 ° C.) of the polyvinyl chloride resin is pressed into the gap between the two molds through the injection path of the male mold for injection molding, and cooled and solidified. The male mold for injection molding was opened, the resin molded body was taken out, and finished to obtain a decorative material.

Decorative sheet with protective film (Sample 1,
In the above series of production of the decorative material using 2), no interfacial peeling between the protective film and the decorative sheet occurred.
Also, when the protective film was peeled from the cosmetic material by hand,
It could be peeled off neatly, and the design surface of the decorative sheet was good without any scratches and matte.

On the other hand, in the production of a series of decorative materials using the decorative sheet with the protective film (Sample 3), interface peeling between the protective film and the decorative sheet occurred. Example 2 Preparation of a Decorative Sheet with a Protective Film First, a 100 μm-thick polyvinyl chloride resin film (Lenoplus manufactured by C-I Kasei Co., Ltd.) was prepared as a base film, and an ink for a pattern layer was applied to one surface of the polyvinyl chloride resin film. Grain printing was used to print a grain pattern. This allows
A decorative sheet having a configuration as shown in FIG. 3 (A) was obtained.
In addition, the ink for the pattern layer is a mixed binder of a vinyl chloride-vinyl acetate copolymer and an acrylic resin (mixing ratio = 1: 1).
In 1), an ink containing quinacridone red, isoindolinone yellow, and carbon black as pigments was used.

Next, one surface of a polyethylene terephthalate film (Lumirror T-70 (38 μm thickness) manufactured by Toray Industries, Inc.) was subjected to sandblasting and JIS-B-
A rough surface having a surface roughness of 10 μm based on a 10-point average roughness of 0601 was formed. Next, a pattern of a wood grain conduit was formed on the rough surface using an unsaturated acrylic ultraviolet curable ink (Seika Beam 301-G, manufactured by Dainichi Seika Co., Ltd.) to form a protective film. This wood grain conduit pattern is formed by using a plate cylinder made of a transparent material manufactured by Asahi Kasei Kogyo Co., Ltd., applying ink on the above-mentioned rough surface, and superimposing and adhering to the plate cylinder to form a transparent It was cured by irradiating ultraviolet rays from inside the plate cylinder. JI of such wood grain conduit pattern
The surface roughness according to 10 point average roughness of SB-0601 is as follows:
It was 100 μm.

Then, immediately after the decorative sheet was heated to 80 ° C. to soften it, the protective film was overlaid so that the rough surface of the protective film was in contact with the design surface of the decorative sheet, and heated with a metal roller heated to 80 ° C. By pressing, a decorative sheet with a protective film of the present invention was obtained. The peel strength between the protective film and the decorative sheet of the decorative sheet with the protective film was measured by a tensile tester (RTC-125 manufactured by Orientec Co., Ltd.).
OA) was 100 g / inch as measured by 90 ° peeling at a peeling speed of 100 mm / min. Conversion
Using the decorative sheet with a protective film described above,
A decorative material was produced in the same manner as in Example 1.

In the production of this series of decorative materials, no interfacial peeling between the protective film and the decorative sheet occurred. In addition, when the protective film was peeled off from the decorative material by hand, the protective film could be peeled cleanly, and the decorative sheet had a good design surface with no scratch and wood grain emboss.

[0046]

As described above in detail, according to the present invention, at least the surface in close contact with the decorative sheet is provided with a physically rough surface, and at least the surface in close contact with the decorative sheet is chemically bonded to the decorative sheet. By press-bonding a protective film formed of a material that is unlikely to cause bonding to a decorative sheet, the decorative film is attached to at least a part of the decorative sheet so that the protective film is detachably attached to the decorative sheet. Due to the anchoring effect on the decorative sheet due to the roughened surface of the protective film, the protective film is stably detachably attached to the decorative sheet. The protective film protects the design surface of the decorative sheet and does not chemically bond to the decorative sheet. Therefore, the protective film can be peeled off neatly when using the decorative material, and by appropriately setting the uneven shape of the rough surface of the protective film, not only the matte surface of the decorative sheet but also the decorative surface Thus, various embossing processes such as wood grain, leather tone, and geometric pattern can be performed. Also,
In a decorative material in which such a decorative sheet with a protective film is provided on at least a part of the resin molded body by fusing and integrating the decorative sheet side, the design surface of the decorative sheet is subjected to an external force applied in a manufacturing stage, a transportation stage, and the like. In addition to being reliably protected by the protective film, when using the decorative material, the protective film can be easily and surely peeled off and removed, and a clean design surface of the decorative sheet can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a decorative sheet with a protective film of the present invention.

FIG. 2 is a view showing various aspects of a rough surface of a protective film constituting a decorative sheet with a protective film of the present invention.

FIG. 3 is a view showing another embodiment of the decorative sheet constituting the decorative sheet with a protective film of the present invention.

FIG. 4 is a view showing an example of pressure bonding of the protective film and the decorative sheet constituting the decorative sheet with the protective film of the present invention.

FIG. 5 is a perspective view showing one embodiment of the decorative material of the present invention.

6 is a cross-sectional view of the decorative material shown in FIG. 5 taken along line AA.

FIG. 7 is a diagram for explaining an example of a method for producing a decorative material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Decorative sheet with protective film 2 ... Decorative sheet 3 ... Base film 4 ... Picture layer 5 ... Transparent protective layer 7 ... Protective film 8 ... Rough surface 11 ... Cosmetic material 12 ... Resin molding 21 ... Female mold for injection molding 22 ... Male mold for injection molding

Claims (4)

[Claims] Claims: 1. A decorative sheet with a protective film in which a protective film is releasably attached to at least a part of a decorative sheet, wherein at least a surface closely contacting the decorative sheet is provided with a physically rough surface, and A decorative sheet with a protective film, characterized in that at least a surface in close contact with the decorative sheet is formed by pressing a protective film formed of a material that is unlikely to chemically bond to the decorative sheet and a decorative sheet. 2. The rough surface according to JIS-B-0601.
The decorative sheet with a protective film according to claim 1, wherein the decorative sheet has irregularities having a surface roughness based on zero point average roughness in a range of 1 to 100 µm. 3. The rugged surface according to JIS-B-0601-1.
The decorative sheet with a protective film according to claim 2, wherein the decorative sheet with a protective film according to claim 2, wherein a part of the unevenness has a surface roughness based on a zero point average roughness of 100 to 1000 μm. 4. A resin molded article, and a decorative sheet with a protective film provided on at least a part of the resin molded article, wherein the decorative sheet with a protective film is any one of claims 1 to 3. A decorative material, characterized in that the decorative sheet with the protective film according to any one of the preceding claims, wherein the decorative sheet side is fused and integrated with a resin molded body.