Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
  • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • C09J7/385—Acrylic polymers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/02—Non-macromolecular additives
  • C09J11/04—Non-macromolecular additives inorganic
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/08—Macromolecular additives
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
  • C09J7/29—Laminated material

Definitions

• the present disclosure relates to a heat-stretchable decorative film for light projection and an article to which the same is bonded.
• Patent Document 1 JP 2005-014374 A describes a decorative film that is used as, for example, an interior material of an automobile, in which a glittering texture (unevenness) is formed on an upper surface of a transparent or opaque first synthetic resin film, and a transparent second synthetic resin film including one layer or multiple layers is laminated on the texture.
• a glittering texture unevenness
• Patent Document 2 JP 2015-167314 A describes a transport vehicle on which an image display device is mounted, the image display device including: an image projection unit that projects an image in an enlarged manner; a screen unit on which the image is projected; and an image processing substrate to which an image signal is input and that performs distortion correction of the image signal based on a dynamic relative position between the image projection unit and the screen unit and outputs the corrected image signal to the image projection unit, in which the image projection unit outputs a result of detecting a vibration or an acceleration of the image projection unit to the image processing substrate as an image projection unit sensor signal, the screen unit outputs a result of detecting a vibration or an acceleration of the screen unit to the image processing substrate as a screen unit sensor signal, the image processing substrate includes a distortion correction circuit, and the distortion correction circuit calculates the dynamic relative position based on the screen unit sensor signal and the image projection unit sensor signal to correct distortion of the image signal.
• Patent Document 3 JP 2017-074869 A describes a display device for a vehicle including: a passenger seat-side instrument panel that is provided on the front side of a passenger seat in a vehicle front-rear direction and does not include a glove compartment; a screen that is stored in the passenger seat-side instrument panel and is disposed on the rear side of the passenger seat-side instrument panel in the vehicle front-rear direction when pulled out; and a projector that is provided at a front end portion of a vehicle interior ceiling or a front pillar on the passenger seat side and projects an image on the screen.
• Patent document 1 JP 2005-014374 A
• Patent document 2 JP 2015-167314 A
• a screen used in a light projection display system exhibits decorativeness and conformability to a three-dimensional shape. Therefore, for example, in a case where this screen is applied to an instrument panel portion of an automobile, the design of a vehicle interior space may deteriorate.
• a portion called a hot spot where the brightness is extremely high may be generated. This hot spot may interfere with image uniformity, vehicle driving, and the like.
• the present disclosure provides a heat-stretchable decorative film for light projection that exhibits decorativeness when light is not projected, functions as a screen when light is projected, and can reduce the generation of hot spots, and an article to which the decorative film is bonded.
• a heat-stretchable decorative film for light projection including a decorative layer and an adhesive layer, in which at least one of the decorative layer and the adhesive layer includes light-diffusing particles, and a total amount of the light-diffusing particles per unit area in the decorative layer and the adhesive layer is about 2.0 g/m2 or greater.
• an article including: a base component; and the above-described decorative film that is bonded to the base component.
• a method of manufacturing an article including: a step of preparing the above-described decorative film and a base component; and a step of applying the decorative film to a surface of the base component using a three-dimensional overlay method to form an article in which the decorative film is bonded to the surface of the base component.
• a heat-stretchable decorative film for light projection that exhibits decorativeness when light is not projected, functions as a screen when light is projected, and can reduce the generation of hot spots; and an article to which the decorative film is bonded.
• the heat-stretchable decorative film for light projection according to the present disclosure can be applied to, for example, a curved surface portion of an instrument panel or the like that requires decorativeness and cannot be used as a screen in the related art.
• FIG. 1 is a cross-sectional view illustrating a heat-stretchable decorative film for light projection according to one embodiment of the present disclosure.
• FIG. 2 is a cross-sectional view illustrating a heat-stretchable decorative film for light projection according to another embodiment of the present disclosure.
• FIG. 3 is a graph illustrating a 7/10 value angle of brightness with respect to the total amount of light-diffusing particles in a decorative layer and an adhesive layer of the decorative film according to the embodiment of the present disclosure.
• FIG. 4 is a graph illustrating a 9/10 value angle of brightness with respect to the total amount of light-diffusing particles in the decorative layer and the adhesive layer of the decorative film according to the embodiment of the present disclosure.
• FIG. 5 is a graph illustrating a brightness value with respect to a viewing angle in a comparative decorative film.
• FIG. 6 is a graph illustrating a brightness value with respect to a viewing angle in the decorative film according to the embodiment of the present disclosure.
• FIG. 10 is a graph illustrating a brightness value with respect to a viewing angle in a decorative film according to still another embodiment of the present disclosure. DESCRIPTION OF THE PREFERRED EMBODIMENTS
• a 7/10 value angle of brightness may be about 20 degrees or greater.
• a heat-stretchable decorative film for light projection includes a decorative layer and an adhesive layer, in which at least one of the decorative layer and the adhesive layer includes light-diffusing particles, and a total amount of the light-diffusing particles per unit area in the decorative layer and the adhesive layer is about 2.0 g/m2 or greater.
• FIGS. 1 and 2 A cross-sectional view of the heat-stretchable decorative film for light projection according to the embodiment of the present disclosure is illustrated in FIGS. 1 and 2.
• the total amount of the light-diffusing particles per unit area in the decorative layer and the adhesive layer in the decorative film according to the present disclosure is preferably about 2.0 g/m2 or greater, about 2.5 g/m2 or greater, or about 3.0 g/m2 or greater.
• the total amount is preferably about 20 g/m2 or less, about 15 g/m2 or less, about 10 g/m2 or less, or about 8 g/m2 or less.
• At least one of the decorative layer and the adhesive layer includes a predetermined amount of light- diffusing particles. Therefore, the generation of hot spots caused by light from a light projection portion can be reduced.
• the degree to which the generation of hot spots is reduced can be quantified by a position (viewing angle from the starting point) where the brightness value is 7/10 of the maximum brightness value of light in the vicinity of the center of the light projection portion that has passed through the decorative film, that is, can be quantified by the 7/10 value angle of brightness (hereinafter, also simply referred to as“7/10 value angle”).
• the 7/10 value angle of brightness may be about 20 degrees or greater, about 25 degrees or greater, or about 30 degrees or greater.
• the upper limit value of the 7/10 value angle of brightness is not particularly limited and, for example, may be about 85 degrees or less, about 80 degrees or less, or about 75 degrees or less.
• the degree to which the generation of hot spots is reduced can be quantified by adopting a position where the brightness value is 9/10 of the maximum brightness value of light in the vicinity of the center of the light projection portion that has passed through the decorative film, that is, can be quantified by the 9/10 value angle of brightness (hereinafter, also simply referred to as“9/10 value angle”).
• the 9/10 value angle of brightness may be about 30 degrees or greater, about 32 degrees or greater, or about 35 degrees or greater.
• the upper limit value of the 9/10 value angle of brightness is not particularly limited and, for example, may be about 60 degrees or less, about 57 degrees or less, or about 55 degrees or less.
• the thickness of the decorative film may be about 25 ⁇ m or greater, about 50 ⁇ m or greater, or about 100 ⁇ m or greater and may be about 2 mm or less, about 1 mm or less, or about 500 ⁇ m or less.
• the decorative film is sufficiently conformable to an article having a complex shape such that a structure having a good external appearance can be provided.
• the thickness of the decorative layer may vary and may be about 0.1 ⁇ m or greater, about 1 ⁇ m or greater, or about 2 ⁇ m or graeter and may be about 30 ⁇ m or less, about 25 ⁇ m or less, or about 20 ⁇ m or less.
• the thickness of the adhesive layer may be about 5 m or greater, about 10 ⁇ m or greater, or about 20 ⁇ m or greater and may be about 200 ⁇ m or less, about 100 ⁇ m or less, or about 80 ⁇ m or less.
• the decorative layer and the adhesive layer includes light-diffusing particles.
• the adhesive layer is generally thicker than the decorative layer and is close to the light projection portion side. Therefore, from the viewpoint of light diffusion efficiency or the like, it is preferable that the adhesive layer includes the light-diffusing particles.
• the light-diffusing particles may be any particles having light diffusing properties, and organic or inorganic particles in which a difference in refractive index from the decorative layer or the adhesive layer that does not include the particles is about 0.05 or higher, about 0.06 or higher, or 0.07 or higher can be used.
• the difference in refractive index may be about 1.5 or lower, about 1.4 or lower, or about 1.3 or lower.
• the light-diffusing particles may be solid or hollow and may have a spherical shape or a non-spherical shape such as a plate shape or an elliptical shape.
• a material of the light-diffusing particles is not limited to the following example, for example, an inorganic material such as silica, mica, barium sulfate, titanium oxide, or glass or a resin material such as styrene can be used alone or in combination of two or more kinds thereof.
• a transparent material such as styrene or glass that is less likely to interfere with decoration of the color layer or the like and has high transparency is desirable as a single substance.
• particles having a small particle size for example, titanium oxide having a small particle size is desirable.
• the decorative film according to the present disclosure may further include at least one selected from the group consisting of the protective layer, the glittering layer, the support layer, the joining layer, and the release liner.
• a material of the protective layer that is applicable to the decorative film according to the present disclosure is not limited to the following example, for example, a (meth)acrylic resin such as polymethyl methacrylate (PMMA) or a (meth)acrylic copolymer, polyurethane, a fluororesin such as an ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), or a methyl methacrylate-vinylidene fluoride copolymer (PMMA/PVDF), a silicone resin, polyvinyl chloride (PVC), polycarbonate (PC), a polyolefin such as polyethylene (PE) or polypropylene (PP), a polyester such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), or a copolymer such as an ethylene/acrylic acid copolymer (EAA) and an ionomer thereof, an ethylene- ethyl
• the use of a (meth)acrylic resin, polyurethane, a fluororesin, or polyvinyl chloride is preferable from the viewpoint of chemical resistance and/or weather resistance, and the use of a (meth)acrylic resin or polyurethane is more preferable from the viewpoint of abrasion resistance and/or environmental load when the material is burned or buried as waste.
• the protective layer may have a multi-layer structure.
• the protective layer may be a laminate including films formed of the above-described resins or may be a multi-layer coating including the above- described resins.
• the protective layer may include a three-dimensional uneven shape such as an embossed pattern that is provided on a part or the entire area of the surface thereof.
• the protective layer may include the uneven shape.
• an image suitable for the uneven shape for example, an image conforming to the uneven shape
• the design can be further improved.
• the uneven shape is preferable, and the advantageous effect of projecting an image to a film having decorative performance as in the present disclosure is further improved.
• the protective layer can be formed by coating a resin composition to a region on or over the decorative layer directly or through the joining layer or the like.
• the coating of the protective layer can be performed before or after applying the decorative film to the base component that is an adherend.
• the resin composition may be coated to the release liner to form a protective layer film, and this film may be laminated on the decorative layer through the joining layer.
• the protective layer film can also be directly laminated on the decorative layer without going through the joining layer.
• the protective layer film can be formed, for example, by coating a resin material such as a curable (meth)acrylic resin composition or a reactive polyurethane composition to the release liner or the like using an knife coating method, a bar coating method, a blade coating method, a doctor blade coating method, a roll coating method, a cast coating method, or the like and optionally photocuring or thermally curing the composition.
• a resin material such as a curable (meth)acrylic resin composition or a reactive polyurethane composition
• the protective layer a layer that is formed in a film shape in advance by extrusion, drawing, or the like may also be used.
• This film can be laminated on the decorative layer through the joining layer.
• the decorative layer has adhesiveness to the film
• the film can also be directly laminated on the decorative layer without going through the joining layer.
• the protective layer can also be formed by multilayer extrusion together with another layer.
• a (meth)acrylic film can be used as the other layer.
• the (meth)acrylic film is mainly formed of PMMA.
• the (meth)acrylic resin having superior abrasion resistance and the like is used as the other layer and the fluororesin such as ETFE, PVDF, or PMMA/PVDF having superior chemical resistance is used as the protective layer, the formed protective layer can obtain the performances of the two layers.
• the protective layer according to the present disclosure may include an optional component such as a filler, an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a bar coating material, a gloss imparting agent, a dispersant, a plasticizer, a flow improver, a surfactant, a leveling agent, a silane coupling agent, a catalyst, a pigment, or a dye.
• an optional component such as a filler, an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a bar coating material, a gloss imparting agent, a dispersant, a plasticizer, a flow improver, a surfactant, a leveling agent, a silane coupling agent, a catalyst, a pigment, or a dye.
• an ultraviolet absorber such as benzotriazole or Tinuvin (trade name) 400 (available from BASF SE) and a hindered amine light stabilizer (HALS) such as Tinuvin (trade name) 292 (available from BASF SE)
• HALS hindered amine light stabilizer
• Tinuvin trade name 292
• the bar coating material may be included in the protective layer or may be separately coated and applied as a bar coating layer.
• the protective layer may be partially semi-transparent or opaque. From the viewpoint of display performance of an image or a video, it is preferable that the protective layer is transparent. From the viewpoint of the transparency and protective performance such as chemical resistance of the protective layer, it is preferable that a pigment, a filler, or the above-described light-diffusing particles having a particle size that can contribute to light scattering properties are included in the protective layer.
• the light-diffusing particles are included in the decorative layer and/or the adhesive layer that is closer to the light projection portion side of the light projection device than the protective layer and is protected by the protective layer, deterioration in the protective performance and decorativeness of the decorative film can be prevented, and the generation of hot spots can be further reduced as compared to the light-diffusing particles are included in the protective layer.
• the thickness of the protective layer may vary and may be, for example, about 1 ⁇ m or greater, about 5 ⁇ m or greaster, or about 10 ⁇ m or greater and may be about 200 ⁇ m or less, about 100 ⁇ m or less, or about 80 ⁇ m or less.
• the protective layer is thin from the viewpoint of shape conformability.
• the thickness of the protective layer is preferably about 100 ⁇ m or less or about 80 ⁇ m or less.
• the protective layer is thick.
• the thickness of the protective layer is preferably about 5 ⁇ m or greater or about 10 ⁇ m or greater.
• the storage modulus of the protective layer may be about 1.0 x 106 Pa or higher, about 1.5 x 106 Pa or higher, or about 2.0 x 106 Pa or higher, and may be about 1.5 x 108 Pa or lower, or about 1.3 x 108 Pa or lower when measured in a tension mode at a frequency of 10 Hz in a temperature range of 110°C to 150°C.
• the storage modulus of the protective layer refers to one value obtained by measuring the storage modulus of the multi-layer structure as a whole in which the storage modulus values of the respective layers are combined.
• the scratch resistance of the decorative film including the protective layer can be evaluated based on the pencil hardness defined by JISK 5600-5-4.
• the pencil hardness may be 6 B or higher, 5 B or higher, 4 B or higher, or 3 B or higher.
• the decorative film according to the present disclosure can also function as a screen when light is projected. Therefore, in a case where the glittering layer is applied, it is preferable that the glittering layer is a layer that can allow transmission of light emitted from the light projection portion.
• the support layer according to the present disclosure may include an optional component such as an antioxidant, an ultraviolet absorber, a filler, a light stabilizer, a heat stabilizer, a dispersant, a plasticizer, a flow improver, a surfactant, a leveling agent, a silane coupling agent, a catalyst, a pigment, or a dye.
• the support layer may be partially semi-transparent or opaque. From the viewpoint of display performance of an image or a video, it is preferable that the support layer is transparent. In consideration of the influence on decorativeness or glittering properties of the decorative layer or the glittering layer, it is preferable that the surface of the support layer is substantially flat.
• the joining layer (also referred to as“primer layer” or the like) may be used.
• the joining layer for example, a solvent type, an emulsion type, a pressure-sensitive type, a heat-sensitive type, a thermosetting type, or an ultraviolet curable type adhesive that is generally used and is formed of a (meth)acryl, a polyolefin, a polyurethane, a polyester, a rubber can be used.
• the joining layer can be applied using a well-known coating method.
• the joining layer according to the present disclosure may include an optional component such as an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a tackifier, a dispersant, a plasticizer, a flow improver, a surfactant, a leveling agent, a silane coupling agent, a catalyst, a pigment, or a dye.
• an optional component such as an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a tackifier, a dispersant, a plasticizer, a flow improver, a surfactant, a leveling agent, a silane coupling agent, a catalyst, a pigment, or a dye.
• the heat-stretchable decorative film for light projection according to the present disclosure exhibits decorativeness when light is not projected, and has performance of functioning as a screen when light is projected. Therefore, the heat-stretchable decorative film for light projection can be used for an interior or exterior member of a vehicle such as an automobile or a train, a ship, an airplane, or the like, a home electronic appliance, a building material, a show window, or a showcase.
• the heat- stretchable decorative film for light projection according to the present disclosure exhibits performance capable of reducing the generation of hot spots, and thus is particularly suitable for the use in an interior member such as an instrument panel of an automobile.
• the decorative film is applied to an instrument panel portion of an automobile having a curved surface shape
• information of an image or a video can be projected from a rear projection display system or the like to the instrument panel portion as necessary while maintaining the external appearance of the related as it is or preventing deterioration in the design of a vehicle interior space.
• an article in which a base component is covered with the decorative film can be formed by applying the decorative film to the base component using insert molding (IM) or a three-dimensional overlay method (TOM).
• IM insert molding
• TOM three-dimensional overlay method
• a thermoplastic material for forming the base component to the decorative film
• an article in which the decorative film and the extruded thermoplastic material are integrated can be formed.
• IM, TOM, and the extrusion method can be performed using a well-known method of the related art.
• the decorative film according to the present disclosure can be used in various forming techniques such as TOM, IM, or the extrusion method but can be preferably used particularly in TOM.
• the base component is not particularly limited to the following example, for example, polypropylene, polycarbonate, an acrylonitrile-butadiene-styrene copolymer or, a mixture thereof can be used.
• the base component may have various planes and/or three-dimensional shapes.
• the maximum area stretch rate of the decorative film after molding is about 50% or higher, about 100% or higher, or about 150% or higher and is about 500% or lower, about 400% or lower, or about 300% or lower.
• A the area of a portion of the decorative film before molding
• B the area of a portion of the decorative film corresponding to A after molding.
• the maximum area stretch rate refers to a value of a portion where the area stretch rate is the highest in the decorative film on the entire surface of the molded article.
• the maximum area stretch rate is a substantial index indicating the success or failure of the molded article.
• the maximum area stretch rate can be verified, for example, by printing 1 mm2 squares on the entire surface of the decorative film before molding and measuring a change in area after molding or by measuring the thickness of the decorative film before or after molding.
• part(s) and percent represent part(s) by mass and mass percent.
• Table 1 Materials shown in Table 1 were mixed with each other at a mixing ratio shown in Table 2 to prepare each of coating solutions for preparing a decorative layer and an adhesive layer.
• a pressure-sensitive acrylic adhesive in a coating solution for an adhesive layer a pressure-sensitive adhesive that was adjusted to have an acrylic resin theoretical refractive index of about 1.49 was used.
• Table 2 all the numerical values are represented by mass%.
• a coating solution G-3 for a decorative layer was coated to a release liner formed of a polyester resin and subsequently was heated and dried at 110°C for 5 minutes. As a result, a laminate A including a decorative layer having a thickness of about 6 ⁇ m was formed. Next, the decorative layer of the laminate A and a multilayer-extruded film (hereinafter, also simply referred to as “protective layer”) as a protective layer formed of PMMA and PVDF and having a thickness of about 105 ⁇ m were laminated at 120°C to form a laminate B.
• a multilayer-extruded film hereinafter, also simply referred to as “protective layer” as a protective layer formed of PMMA and PVDF and having a thickness of about 105 ⁇ m were laminated at 120°C to form a laminate B.
• the decorative layer of the laminate B and a polyurethane film (hereinafter also simply referred to as“support layer”) as a support layer having a thickness of 20 ⁇ m were laminated at 120°C to form a laminate C.
• a coating solution T-4 for an adhesive layer was coated to another release liner formed of a polyester resin using a knife coater and was heated and dried at 120°C for 10 minutes to form a laminate D including an adhesive layer having a thickness of about 40 ⁇ m.
• the support layer of the laminate C and the adhesive layer of the laminate D were laminated at 50°C to form a decorative film.
• a decorative film according to Example 2 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-1, the thickness of the decorative layer was changed to about 8 ⁇ m, and the coating solution for the adhesive layer was changed to T-3.
• a decorative film according to Example 3 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-2, and the thickness of the decorative layer was changed to about 8 ⁇ m.
• Example 4
• a decorative film according to Example 4 was prepared under the same conditions as those of Example 1, except that the thickness of the decorative layer was changed to about 8 ⁇ m, and the coating solution for the adhesive layer was changed to T-2.
• a decorative film according to Example 6 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-2, the thickness of the decorative layer was changed to about 10 ⁇ m, and the coating solution for the adhesive layer was changed to T-2.
• a decorative film according to Example 7 was prepared under the same conditions as those of Example 1, except that the thickness of the decorative layer was changed to about 10 ⁇ m, and the coating solution for the adhesive layer was changed to T-3.
• a decorative film according to Example 8 was prepared under the same conditions as those of Example 1, except that the thickness of the decorative layer was changed to about 10 ⁇ m.
• a decorative film according to Example 9 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-0, the thickness of the decorative layer was changed to about 8 ⁇ m, and the coating solution for the adhesive layer was changed to T-5.
• a decorative film according to Example 11 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-0, the thickness of the decorative layer was changed to about 8 ⁇ m, a support layer including a tin-deposited layer having a thickness of 300 to 700 nm corresponding to a glittering layer was adopted, and the coating solution for the adhesive layer was changed to T-6.
• the coating solution for the decorative layer was changed to G-0
• the thickness of the decorative layer was changed to about 8 ⁇ m
• a support layer including a tin-deposited layer having a thickness of 300 to 700 nm corresponding to a glittering layer was adopted, and the coating solution for the adhesive layer was changed to T-6.
• a decorative film according to Example 12 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-0, the thickness of the decorative layer was changed to about 8 ⁇ m, and the coating solution for the adhesive layer was changed to T-7.
• a decorative film according to Example 13 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-0, the thickness of the decorative layer was changed to about 8 m, the coating solution for the adhesive layer was changed to T-7, and the thickness of the adhesive layer was changed to about 60 ⁇ m.
• a decorative film according to Comparative Example 1 was prepared under the same conditions as those of Example 1, except that the coating solution for the decorative layer was changed to G-0, the thickness of the decorative layer was changed to about 8 ⁇ m, and the coating solution for the adhesive layer was changed to T-l .
• a sample of the decorative film was disposed between“EZ Contrast” (available from ELDIM) as a camera for measuring brightness and a light projection portion of“Camcorder Projector CP45R” (available from 3M) as a small projector such that a main surface of the decorative film was perpendicular to the light projection portion and the distance between the light projection portion and the decorative film was about 32 cm.
• the results relating to the 7/10 value angle, the 9/10 value angle, and the brightness value at each viewing angle are shown in Table 3 and FIGS. 3 to 10.
• FIG. 5 corresponds to the configuration of Comparative Example 1
• FIGS. 6 to 10 correspond to Examples 8 to 10, 12, and 13.
• the 7/10 value angle tended to be about 20 degrees or greater.
• the 7/10 value angle was less than 20 degrees, as can be seen from FIG. 5
• the generation of hot spots was poor.
• the decorative films according to Examples 1 to 13 in which the 7/10 value angle was about 20 degrees or greater as can be seen from FIGS. 6 to 10, the generation of hot spots was able to be significantly reduced.
• the 9/10 value angle tended to be about 30 degrees or greater.
• the generation of hot spots was able to be further reduced as compared to the decorative film (FIG. 7) according to Example 9 in which the 7/10 value angle was about 20 degrees or greater and the 9/10 value angle was less than about 30 degrees.

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• 2018
  • 2018-02-07 JP JP2018020295A patent/JP7071141B2/ja active Active
• 2019
  • 2019-02-06 WO PCT/IB2019/050923 patent/WO2019155361A1/en unknown
  • 2019-02-06 CN CN201980011595.1A patent/CN111684034B/zh not_active Expired - Fee Related
  • 2019-02-06 EP EP19709782.7A patent/EP3749728A1/en not_active Withdrawn

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