JP2020157671A - Decorative laminate with property of transmitting light from light source, and illumination display device comprising decorative laminate - Google Patents

Abstract

To provide a decorative laminate capable of providing design changed by light in an ambient environment and light from a light source disposed behind.SOLUTION: A decorative laminate includes a first concavo-convex layer disposed on a light source side, and a reflective layer disposed directly atop or at a distance above the first concavo-convex layer, on a side opposite to the light source with respect to the first concavo-convex layer, the reflective layer having an OD value from 0.7 to 1.7. The decorative laminate has a property of transmitting light from the light source.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a decorative laminate having the ability to transmit light from a light source, and an illumination display device including the decorative laminate.

Decorative films of various designs are used in automobile interior materials and a wide range of other fields. As one aspect of the design of the decorative film, the pattern of the translucent part is visually recognized when illuminated with a light source from behind, but the pattern of the translucent part is assimilated with the surrounding light-shielding part when not illuminated by the light source from behind. A decorative film that cannot be seen is proposed.

Patent Document 1 (Japanese Unexamined Patent Publication No. 2001-347539) states that "the insert film or transfer layer is integrated with the surface of a translucent molded product, and one or more translucent portions and light shielding adjacent to the translucent portions. The decorative molded product having a portion has a light-shielding layer formed only on the light-shielding portion, and a colored light-transmitting layer formed on at least the light-transmitting portion in at least one region around the light-transmitting portion. In the L ^* a ^* b ^* color system of CIE (International Lighting Committee) 1976, the light-transmitting part and the light-shielding part in the above-mentioned area are sequentially laminated from the visual side. Color difference ΔE when measured, value X ₁ (%) of light transmittance of all layers including the molded product located in the translucent part in the above region measured in JIS K 7105 and located in the light shielding part in the above region. Regarding the maximum value X ₂ (%) of the light transmittance of all layers including the molded product, the following relational expressions (1) to (3) hold, and the portion where the colored light transmitting layer is not formed is formed in the light shielding portion in the above region. In some cases, the decorative molded product that can be backlit is characterized in that the relational expression (4) holds. ΔE ≤ 50 ... (1) 3 ≤ X ₁ <70 ... (2) 4X ₂ ≤ X ₁ ... (3) X ₂ ≤ 10 ... (4) "is described.

Japanese Unexamined Patent Publication No. 2001-347539

The demand for design diversity for decorative films is increasing. In particular, the design changes depending on whether the product is placed in an environment where light is incident on the surface of the decorative film, such as under daylight without being illuminated by the light source from behind, or when it is placed in a dark place and illuminated by the light source from behind the decorative film. , There is a demand for a decorative film capable of providing a highly designed appearance.

The present disclosure provides a decorative laminate that can provide a design that changes with light from the ambient light and light from a light source located behind it.

According to one embodiment of the present disclosure, the first concavo-convex layer arranged on the light source side and the first concavo-convex layer are arranged directly or apart from the first concavo-convex layer on the opposite side of the light source. Provided is a decorative laminate comprising a reflective layer having an OD value of 0.7 to 1.7 and having the ability to transmit light from a light source.

According to another embodiment of the present disclosure, there is provided an illumination display device comprising a light source and the above-mentioned decorative laminate placed on the light source.

According to the present disclosure, there is provided a decorative laminate capable of providing a design that changes depending on the light of the ambient environment and the light from a light source arranged behind.

The above description should not be deemed to disclose all embodiments of the invention and all advantages relating to the invention.

It is a schematic sectional view of the illumination display device to which the decorative laminate according to one Embodiment of this disclosure is attached, and (a) shows the appearance when observed with the light source turned off. (B) shows the appearance when observed with the light source turned on. It is a photograph of the illumination display device to which the decorative laminate according to one embodiment of the present disclosure is attached, and (a) shows the appearance (first design) of the surface of the decorative laminate under daylight. b) shows the appearance (second design) when light is irradiated from behind the decorative laminate. It is the schematic sectional drawing of the illumination display device which attached the decorative laminate according to another embodiment of this disclosure, and (a) shows the appearance when observed with the light source turned off. , (B) show the appearance when observed in a state where the light source is lit. It is a photograph of the illumination display device to which the decorative laminate according to another embodiment of the present disclosure is attached, and (a) shows the appearance (first design) of the surface of the decorative laminate under daylight. (B) shows the appearance (second design) when light is irradiated from behind the decorative laminate.

Hereinafter, the present invention will be described in more detail with reference to the drawings for the purpose of exemplifying typical embodiments of the present invention, but the present invention is not limited to these embodiments. Regarding reference numbers in drawings, elements with similar numbers in different drawings indicate that they are similar or corresponding elements.

In the present disclosure, the "film" also includes an article called a "sheet".

In the present disclosure, for example, "above" in the "design layer arranged on the reflective layer" means that the design layer is arranged directly on the reflective layer, or the design layer is interposed via another layer. It is intended to be indirectly placed above the reflective layer.

In the present disclosure, for example, the "separation" in the "reflection layer arranged apart from the first uneven layer" means that the reflective layer is not directly arranged on the first uneven layer and is referred to from the first uneven layer. Intended to be located apart.

In the present disclosure, for example, "adjacent" in the "resin layer arranged adjacent to the first uneven layer" means that the resin layer is directly arranged on the first uneven layer or is for joining the resin layers. It is intended to be arranged with respect to the first uneven layer via a layer of, for example, a bonding layer.

In the present disclosure, "(meth) acrylic" means acrylic or methacrylic, and "(meth) acrylate" means acrylate or methacrylate.

In the present disclosure, when referring to the "total light transmittance" referred to for the decorative laminate and its constituent elements (for example, the first uneven layer, the reflective layer, the upper design layer, the lower design layer, etc.), each It means the maximum of the total light transmittance measured in the part of the component in which the decorative laminate functions effectively, that is, the region having one or both of the first design and the second design. For example, the total light transmittance of the decorative laminate means the maximum value measured in the region having both the first design and the second design. On the other hand, the total light transmittance of only the upper design layer and the reflective layer means the maximum value measured in the region having the first design. In the present disclosure, the wavelength range of the visible region is not particularly limited, but the "total light transmittance in the visible region" means the total light transmittance in the range of 400 nm to 700 nm.

In the present disclosure, "omitted" means that variations caused by manufacturing errors and the like are included, and it is intended that fluctuations of about ± 20% are allowed.

In the present disclosure, "transparent" means that the total light transmittance in the visible light region (wavelength 400 nm to 700 nm) is about 80% or more, preferably about 85% or more, or about 90% or more. The upper limit of the total light transmittance is not particularly limited, but can be specified as, for example, less than about 100%, about 99% or less, or about 98% or less.

In the present disclosure, "semi-transparent" means that the total light transmittance in the visible light region (wavelength 400 nm to 700 nm) is less than about 80%, preferably about 75% or less, and does not completely hide the substrate. Intended to be.

The decorative laminate according to one embodiment of the present disclosure has a first concavo-convex layer arranged on the light source side, and the first concavo-convex layer is directly or separated from the first concavo-convex layer on the opposite side of the light source. It contains a reflective layer having an OD value of about 0.7 to about 1.7, and has the ability to transmit light from a light source.

FIG. 1 illustrates a cross-sectional view of the decorative laminate 100 according to one embodiment of the present disclosure. The decorative laminate 100 of FIG. 1 includes a base material 114 having light transmission, a first bonding layer 112, a first resin layer 110, a reflective layer 108, a second bonding layer 106, and a first unevenness. Layer 104 and the like are included in this order. The decorative laminate may include, as arbitrary elements, a surface protective layer, a light-transmitting base material, a light-transmitting upper design layer, a light-transmitting lower design layer, a resin layer, and a decorative laminate. An additional layer such as a bonding layer (primer layer) for joining the layers constituting the above and a release liner may be further included. In FIG. 1, a base material 114 having light transmission, a first bonding layer 112, a first resin layer 110, and a second bonding layer 106 are shown as arbitrary elements.

In one embodiment, for example, when the light-transmitting base material 114 in FIG. 1 is in the form of a film, the decorative laminate 100 may be referred to as a decorative film. When the light-transmitting base material 114 has a shape other than a film such as a plate-shaped object or a three-dimensional object, the decorative laminate 100 may be referred to as a molded product. In this case, the decorative laminate 100 may be referred to as a molded product. The portion excluding the base material, for example, in FIG. 1, the configuration from the first uneven layer 104 to the first bonding layer 112 may be referred to as a decorative film.

FIG. 1 is a schematic cross-sectional view of an illumination display device including a decorative laminate 100 and a light source 102. In FIG. 1A, the light source 102 is turned off, and the light incident from the upper surface of the decorative laminate 100 under daylight is reflected by the substantially smooth reflective layer 108, and the metallic based on the reflective layer 108. The tone design (first design) is visually recognized by the observer. For example, as shown in FIG. 3A, in the case of the configuration in which the upper design layer 211 is applied on the reflective layer 208, it is incident from the upper surface of the decorative laminate 200 under daylight. The light is reflected by the reflective layer 208, and the design (first design) based on the reflective layer 208 and the upper design layer 211 is visually recognized by the observer.

When the light source 102 is turned on in a dark environment around the illumination display device, the amount of light incident on the upper surface of the decorative laminate 100 is small, and the amount of light incident on the lower surface of the decorative laminate 100 from the light source 102 is small. The amount is large. Therefore, the light from the light source 102 is transmitted through the first uneven layer 104 and the reflective layer 108, that is, in the presence of light that is transmitted through the first uneven layer 104 and the reflective layer 108 in this order, the first uneven layer. An observer can visually recognize an effect such as light dispersion based on 104, for example, a design (second design) as illustrated in FIG. 2 (b) based on a prismatic light dispersion effect. When the upper design layer having light transmission is arranged on the reflective layer, or when the lower design layer having light transmission is arranged between the first uneven layer and the reflective layer, the first unevenness is formed. The effect of light dispersion by the layers and the design (second design) due to the combination of the upper design layer and / or the lower design layer will be visually recognized by the observer.

The reflective layer 108 has an OD value of about 0.7 to about 1.7, reflects light incident from the upper surface of the decorative laminate 100 under daylight, and is a decorative laminate 100. It is designed to transmit at least part of the light incident from the underside of the. In this way, the decorative laminate has two types of high design, which change depending on whether it is placed in daylight without being illuminated by a light source from behind or when it is placed in a dark environment and illuminated by a light source from behind. The appearance can be provided.

Although the reflective layer 108 is shown in FIG. 1 as having a substantially smooth surface, the reflective layer may have an uneven surface as shown in FIG. In this embodiment, it is possible to obtain a more varied visual effect, for example, a gloss reducing effect, or an appearance having a sense of depth in daylight.

The first uneven layer is a light-transmitting layer arranged on the light source side as shown in FIG. 1, and causes light from the light source to be scattered, dispersed, or refracted, for example, to exhibit a unique design. It is a layer for.

The first uneven layer may be arranged in the decorative laminate in an exposed state as shown in FIG. 1, that is, in a state of being in contact with air, or may be the refractive index of the first uneven layer. The absolute value of the difference may be adjacent to a layer of about 0.20 or more, about 0.21 or more, or about 0.22 or more. The upper limit of the absolute value of such a layer is not particularly limited, but may be, for example, about 0.50 or less, about 0.45 or less, or about 0.40 or less. The layer having such a difference in refractive index may be applied to the concavo-convex shape side of the first concavo-convex layer, may be applied to the opposite side of the concavo-convex shape, or may be applied to both surfaces of the first concavo-convex layer. May be good. Here, when the layer having such a difference in refractive index may be applied to the opposite side of the concave-convex shape, for example, in FIG. 1, the first concave-convex layer 104 and the second bonding layer 106 are such a case. It may have a relationship of a refractive index difference, or a layer having such a relationship of a refractive index difference may be separately applied between the first uneven layer 104 and the second bonding layer 106.

The material of the layer having such a difference in refractive index is not particularly limited, and for example, an organic material (for example, a fluororesin) or an inorganic material (for example, a fluororesin) having a lower refractive index or a higher refractive index than the material constituting the first uneven layer is used. It may be either titanium oxide or zirconium), or it may be a composite material containing particles having a high refractive index such as titanium oxide or zirconia, particles having a low refractive index such as fluorine particles, and a binder resin.

The depth of the uneven shape of the first uneven layer can be appropriately adjusted according to the required design performance and is not particularly limited. For example, about 1 micrometer or more, about 5 micrometers or more, about 10 micrometers or more, It can be about 15 micrometers or more, about 20 micrometers or more, about 25 micrometers or more, or about 30 micrometers or more. The upper limit of the depth of the uneven shape is not particularly limited, but may be, for example, about 100 micrometers or less, about 80 micrometers or less, about 60 micrometers or less, or about 50 micrometers or less. Since the first uneven layer having such a depth easily scatters, disperses, or refracts the light from the light source, it is easy to exhibit unique design performance. Here, the depth of the concave-convex shape is determined as the height difference from the top of the convex shape to the continuous bottom of the concave shape, and is measured as an Rz value using a stylus type roughness meter conforming to JIS B 0601-2001. Can be done. The depth of the uneven shape may be uniform over the entire surface of the uneven shape, or may be non-uniform, that is, may have various values. The case where the depth of the uneven shape is not uniform over the entire surface of the uneven shape is, for example, the case where the region of the uneven geometric pattern formed by the etching method is set as one unit and the depth changes within the one unit. Alternatively, the depth may change over the entire surface without forming such a unit. The depth of the uneven shape is intended to be the average value of the Rz values measured at at least 10 points. When a concave-convex shape is formed with a region of an uneven geometric pattern as one unit, the depth of the concave-convex shape is intended to be the average value of Rz values measured at at least 10 points within the one unit.

The uneven shape of the first uneven layer is not particularly limited and may be regular or irregular, and can be appropriately adjusted according to the required design performance. For example, various uneven shapes that can exhibit a prism effect, a lens effect, and an effect combining these can be adopted. Such an uneven shape can be formed by, for example, embossing, scratching, laser processing, dry etching processing, or hot pressing processing. For example, it may be prepared by heat embossing with a roll having an uneven surface on the surface of the transparent resin sheet, or it may be melted between a roll having an uneven surface and a roll having a smooth surface while extruding the molten resin. It may be prepared by molding while sandwiching the resin, and if necessary, cooling and winding up. Alternatively, a thermosetting or radiation-curable resin such as a curable (meth) acrylic resin is applied onto a release film having an uneven shape, and the film is cured by heating or irradiation to remove the release film. An uneven layer can also be formed.

As the material of the first uneven layer, various resins such as a thermoplastic resin, a thermosetting resin and a radiation curable resin can be used. Specifically, for example, (meth) acrylic resin containing polymethylmethacrylate (PMMA), polyurethane, polyvinyl chloride, polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS), polyester such as polyethylene and polypropylene, and polyethylene terephthalate. Polyesters such as (PET) and polyethylene terephthalate (PEN), copolymers such as ethylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers and ethylene-vinyl acetate copolymers, or mixtures thereof can be used. .. From the viewpoints of strength, impact resistance, molding processability and the like, polyurethane, polyvinyl chloride, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer and polycarbonate can be advantageously used as the material of the first uneven layer.

The first uneven layer has optional components such as a filler, a reinforcing material, an antioxidant, a cross-linking agent, a curing agent, a curing accelerator, an ultraviolet absorber, a light stabilizer, and a heat stabilizer, as long as the effects of the present disclosure are not impaired. Agents, dispersants, plasticizers, flame retardants, flow improvers, surfactants, silane coupling agents, catalysts, pigments, dyes and the like can be included.

The reflective layer is a layer that is arranged on the first concavo-convex layer on the opposite side of the light source with respect to the first concavo-convex layer, but is based on the manufacturing stability of the reflective layer, the reflective layer, and the like. From the viewpoint of designing the design, it is preferable that the reflective layer is arranged on the first uneven layer at a distance.

The reflective layer is not particularly limited as long as it exhibits the above-mentioned performance. For example, the reflective layer is formed by vacuum deposition, sputtering, ion plating, plating, etc., aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, germanium, etc. It may be a metal selected from the above, or a metal-based thin film containing an alloy or compound thereof. From the viewpoint of productivity and the like, it is advantageous that the reflective layer is a vapor-deposited layer. By using a metal-based thin film, for example, when a base material having a three-dimensional shape is used, it is possible to obtain high reflection performance while reducing the total thickness of the decorative film to improve the followability to the base material. it can.

In one embodiment, the reflective layer is a vapor-deposited layer containing tin, indium or a combination thereof. In this embodiment, the metal constituting the reflective layer is highly stable, and deterioration such as corrosion and discoloration is unlikely to occur even when oxidized, so that the reflective performance of the reflective layer can be maintained for a long period of time. ..

The reflective layer may be aluminum flakes, vapor-deposited aluminum flakes, metal oxide-coated aluminum flakes, aluminum glitter materials such as colored aluminum flakes, flaky mica coated with metal oxides such as titanium oxide and iron oxide, and synthetic mica. A resin layer in which a bright pigment such as a pearl bright material is dispersed in a binder resin such as a (meth) acrylic resin or polyurethane may be used. The reflective layer can also be a metal leaf such as aluminum, nickel, gold, silver or copper.

When the reflective layer is a metal-based thin film or a metal foil, it is advantageous that the reflective layer is supported by a resin layer. By supporting the reflective layer on the resin layer, damage to the reflective layer can be prevented or reduced due to deformation of the decorative laminate, external impact, or the like. As shown in FIG. 1A, the resin layer 110 may be applied to one side of the reflective layer 108, or as shown in FIG. 3A, the resin layers 207, on both sides of the reflective layer 208. 210 may be applied. From the viewpoint of preventing or reducing damage to the reflective layer, it is preferable that the resin layer is applied to both sides of the reflective layer. In one embodiment, the upper design layer and the lower design layer, which will be described later, can function as the resin layer, and the resin layer can be arranged separately from these design layers.

The surface supporting the reflective layer of the resin layer may be a flat surface or a surface having irregularities. When the surface of the resin layer has irregularities, the reflective layer itself formed on the resin layer surface has irregularities, that is, a second uneven surface, which exhibits complex light reflection and has a varied visual effect. You can also play. The depth of the uneven shape on the second uneven surface of the reflective layer can be appropriately adjusted according to the required design performance and is not particularly limited, but in consideration of manufacturing stability, manufacturing cost, etc., the first concave-convex layer It is advantageous that it is shallower than the depth of the uneven shape.

In one embodiment, the resin layer supporting the reflective layer is at least one thermoplastic resin selected from the group consisting of a vinyl chloride-vinyl acetate copolymer, polyurethane, polyester, (meth) acrylic resin, and phenoxy resin. Including. In the present disclosure, the "phenoxy resin" means a thermoplastic polyhydroxypolyether synthesized using bisphenols and epichlorohydrin, and has a trace amount of epichlorohydrin-derived epoxy group in the molecule (for example, at the terminal). Things are also included. For example, the epoxy equivalent of a phenoxy resin is higher than that of a normal epoxy resin, for example, about 5,000 or more, about 7,000 or more, or about 10,000 or more.

It is advantageous that the resin layer supporting the reflective layer contains a phenoxy resin. The resin layer containing a phenoxy resin is particularly excellent in adhesiveness to a reflective layer containing a metal such as tin or indium. In one embodiment, the resin layer supporting the reflective layer comprises a phenoxy resin and polyurethane, particularly a polyester-based polyurethane having excellent compatibility with the phenoxy resin.

The OD (optical density) value of the reflective layer is about 0.7 or more and about 1.7 or less. In some embodiments, the OD value of the reflective layer is about 0.8 or greater, or about 0.9 or greater, and about 1.5 or less, or about 1.3 or less. By setting the OD value of the reflective layer in the above range, the light incident from the upper surface of the decorative laminate under daylight is reflected, and at least a part of the light incident from the lower surface of the decorative laminate is transmitted. can do. As a result, the decorative laminate has two types of highly designed appearance that change depending on whether it is placed in daylight without being illuminated by a light source from behind or when it is placed in a dark environment and illuminated by a light source from behind. Can be provided.

The thickness of the reflective layer may be set so as to have the above OD value, and even if the OD value is the same, the thickness differs depending on the material and the forming method of the reflective layer. For example, when a vapor-deposited layer containing tin, indium, or a combination thereof is used as the reflective layer, these films usually have a sea-island structure and do not have a continuous layer structure.

The decorative laminate of the present disclosure may have a light-transmitting upper design layer and a lower design layer as arbitrary elements. These design layers may include a light-transmitting region and may include one or more light-transmissive regions. The upper design layer is a layer arranged on the reflective layer, and the lower design layer is a layer arranged between the first uneven layer and the reflective layer.

In one embodiment, the entire upper design layer is translucent or transparent. In some embodiments, the total light transmittance in the visible region of the upper design layer is about 1% or more, about 2% or more, or about 3% or more, and about 70% or less, about 60% or less, or about. It is 50% or less. In the present disclosure, the total light transmittance is determined in accordance with JIS K 7361-1: 1997 (ISO 13468-1: 1996). When the total light transmittance of the upper design layer is within the above range, the visibility of the second design when illuminated from behind by a light source can be enhanced.

In some embodiments, the total light transmittance in the visible region of the combination of the upper design layer and the reflective layer is about 0.01% or more, about 0.02% or more, or about 0.05% or more, and is about 12% or less, about 10% or less, or about 8% or less. When the total light transmittance of the combination of the upper design layer and the reflective layer is within the above range, the visibility of the second design under daylight is effectively reduced, and the second design is illuminated from behind with a light source. Visibility can be maintained.

In some embodiments, the total light transmittance in the visible region of the lower design layer is about 1% or more, about 2% or more, or about 3% or more, and about 70% or less, about 60% or less, or about. It is 50% or less. When the total light transmittance of the lower design layer is within the above range, the sharpness of the second design when illuminated from behind by a light source can be enhanced.

As the upper design layer and the lower design layer, for example, a color layer exhibiting a paint color, a pattern such as wood grain, stone grain, geometric pattern, leather pattern, a pattern layer representing a logo, a pattern, etc., and an uneven shape are provided on the surface. Examples include a relief (relief pattern) layer and a layer containing a combination thereof.

As the color layer, for example, inorganic pigments such as titanium oxide, carbon black, yellow lead, yellow iron oxide, red iron oxide, red iron oxide, phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green, azolake pigments, indigo pigments and perinone pigments. Use a resin layer in which pigments such as pigments, perylene pigments, quinophthalone pigments, dioxazine pigments, and organic pigments such as quinacridone pigments such as quinacridone red are dispersed in a binder resin such as (meth) acrylic resin and polyurethane. be able to. In some embodiments, the upper design layer comprises a transparent chromosphere, and the total light transmittance of the upper design layer can be about 85% or more, about 90% or more, or about 95% or more.

As a pattern layer, for example, it is formed by printing such as gravure direct printing, gravure offset printing, inkjet printing, laser printing, screen printing, coating such as gravure coating, roll coating, die coating, bar coating, knife coating, punching, etching, etc. Layers with offset patterns, logos, patterns, etc. can be used.

The handle layer may be supported on the resin layer. As the resin layer, various resins such as (meth) acrylic resin containing polymethylmethacrylate (PMMA), polyurethane, polyvinyl chloride, polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene, polypropylene and the like polyolefin , Polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), copolymers such as ethylene-acrylic acid copolymers, ethylene-ethyl acrylic acid copolymers, ethylene-vinyl acetate copolymers or mixtures thereof. Can be used. From the viewpoint of strength, impact resistance and the like, polyurethane, polyvinyl chloride, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer and polycarbonate can be advantageously used as the resin layer. The resin layer may be in the form of a film, a sheet or the like.

The stalk layer may include multiple regions with different colors and / or light transmittances. The pattern layer may have different colors and light transmittances depending on the location. For example, the light from the light source may be transmitted in a certain region of the handle layer, partially transmitted in another region, and not transmitted in another region.

As the relief layer, a thermoplastic resin layer having a concavo-convex shape on the surface by a conventionally known method such as embossing, scratching, laser processing, dry etching processing, or heat pressing processing can be used. A thermosetting or radiation-curable resin such as a curable (meth) acrylic resin is applied onto a release film having an uneven shape, cured by heating or irradiation, and a relief layer is formed by removing the release film. You can also do it. The thermoplastic resin, thermosetting resin and radiation curable resin used for the relief layer are not particularly limited, but are limited to fluororesins, polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), and (meth) acrylic resins. Polyethylenes such as polyethylene and polypropylene, thermoplastic elastomers, polycarbonates, polyamides, acrylonitrile-butadiene-styrene copolymers (ABS), acrylonitrile-styrene copolymers, polystyrenes, polyvinyl chlorides, polyurethanes and the like can be used.

In one embodiment, the upper design layer has a chromosphere and the lower design layer has a handle layer. In this embodiment, an appearance of a uniform color (first design) is exhibited in an environment where light is incident from the upper surface of the decorative laminate such as under daylight, and for decoration using a light source or the like in a dark surrounding state. When light is incident from the lower surface of the laminate, the combination of the effects of the color of the upper design layer, the pattern of the lower design layer, the dispersion of light by the first uneven layer, and the like (second design) is visually recognized. In another embodiment, both the upper design layer and the lower design layer have a handle layer. In this embodiment, the pattern of the upper design layer (first design) is visually recognized in an environment where light is incident from the upper surface of the decorative laminate such as under daylight, and the decoration is performed using a light source or the like in a dark surrounding state. When light is incident from the lower surface of the laminated body, the combination of the effects of the pattern of the upper design layer, the pattern of the lower design layer, the dispersion of light by the first uneven layer, and the like (second design) is visually recognized.

The resin layer that can be used for the upper design layer or the lower design layer may have adhesiveness. In some embodiments, a reflective layer, a first concavo-convex layer, a substrate, or the like can be directly laminated to such a resin layer without a bonding layer. The adhesive resin layer may be formed by adding a tackifier to the above-mentioned resin material, or may be formed of the same material as the bonding layer described later.

The resin layer contained in the upper design layer may have, for example, a translucent metallic layer having a total light transmittance of about 10% or more and about 70% or less in the visible region. The presence of such a translucent metallic layer can also provide a design that exhibits flip-flop properties whose appearance changes depending on the viewing angle.

The translucent metallic layer is made from aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, germanium, etc. formed by vacuum deposition, sputtering, ion plating, plating, etc. It may be a metal of choice, or a metal-based thin film containing an alloy or compound thereof, or an aluminum glitter material such as aluminum flakes, vapor-deposited aluminum flakes, metal oxide-coated aluminum flakes, colored aluminum flakes, titanium oxide, etc. Flake-shaped mica coated with a metal oxide such as iron oxide and brilliant (metallic) pigments such as pearl glitter materials such as synthetic mica are dispersed in a binder resin such as acrylic resin and polyurethane resin. ) It may be a resin layer.

The thickness of the upper and lower design layers may vary and is generally about 0.1 micrometer or more, about 1 micrometer or more, or about 3 micrometers or more, about 300 micrometers or less, about 200 micrometers or less. , Or about 100 micrometers or less.

The upper design layer and the lower design layer may appropriately contain the optional components described in the first uneven layer as long as the effects of the present disclosure are not impaired.

The decorative laminate of the present disclosure may have, as an arbitrary element, a bonding layer for joining the layers constituting the decorative laminate. As a bonding layer (sometimes called a primer layer), commonly used acrylic type, polyolefin type, polyurethane type, polyester type, rubber type, etc., solvent type, emulsion type, pressure sensitive type, heat sensitive type, thermosetting type Alternatively, an ultraviolet curable adhesive can be used. The thickness of the bonding layer is generally about 0.05 micrometers or more, about 0.5 micrometers or more, or about 5 micrometers or more, about 100 micrometers or less, about 50 micrometers or less, or about 20 micrometers or less. can do.

The bonding layer may contain an optional component described in the first concavo-convex layer, the same colorants as those described for the upper design layer and the lower design layer, and a coloring material such as an organic pigment, as long as the effects of the present disclosure are not impaired. ..

The decorative laminate of the present disclosure may have, as an optional element, a light-transmitting base material, for example, a light-transmitting trim layer. The base material means a layer that can support a reflective layer, a first uneven layer, and the like. The form of the base material is not particularly limited, and is, for example, a film-like form (sometimes referred to as a "film-like base material") or a form other than a film such as a plate-like material or a three-dimensional shape (these may be referred to as "film-like base material"). It may be generically referred to as "three-dimensional shape base material"). Examples of the three-dimensional shape base material include various trim members used for the interior of a vehicle, for example, cabin trim such as door trim, roof trim, and body side trim, and luggage trim such as trunk trim and luggage side trim. Can be done.

When a film-like base material is adopted, the decorative laminate can be called a decorative film. When a three-dimensional shape base material is adopted, the decorative laminate can be called a molded product, and in this case, a portion excluding the base material, for example, in FIG. 1, the first uneven layer 104 to the first The structure up to the bonding layer 112 can be called a decorative film.

The substrate can be placed on top of the reflective layer, for example, on the top layer of the decorative laminate, as shown in FIG. Alternatively, the base material can be placed between the first uneven layer and the reflective layer.

The means for obtaining a decorative laminate by applying a reflective layer or the like to the base material is not particularly limited, and is a coating method, a laminating method, a transfer method, a printing method, a vapor deposition method, an extrusion method, an injection molding method, 3. It can be produced by appropriately combining conventionally known methods such as a three-dimensional heat drawing method (TOM). The following manufacturing method will be described as an example, but the manufacturing method of the decorative laminate is not limited to this.

When the base material is a film-like base material, for example, the bonding layer A is coated on the film-like base material formed by an extrusion method or the like to form the laminate 1.

A resin layer A is formed by coating on a release liner A such as a PET film, and tin, indium, or the like is vapor-deposited on the resin layer A to form a reflective layer supported on the resin layer A. The bonding layer B is coated on the reflective layer to form the laminated body 2.

A resin layer B is formed by coating on a release liner B such as a PET film, and embossing is performed to prepare a first uneven layer to form a laminate 3.

After that, the release liner A of the laminated body 2 and the release liner B of the laminated body 3 are removed, and the bonding layer A of the laminated body 1 and the resin layer A of the laminated body 2 are laminated and bonded, and then the bonding layer B is bonded. And the surface of the first concavo-convex layer of the laminate 3 on the release liner side are laminated and bonded to obtain a decorative laminate (decorative film). In the manufacturing method, the coating may be provided with a drying and / or curing step, if necessary, and may be replaced with a single-layer extrusion method, a multi-layer extrusion method, or the like.

When the base material is a three-dimensional base material, for example, a bonding layer C is coated on a release liner C such as a PET film to form a laminated body 4.

A resin layer C is formed by coating on a release liner D such as a PET film, and tin, indium, or the like is vapor-deposited on the resin layer C to form a reflective layer supported on the resin layer C. The bonding layer D is coated on the reflective layer to form the laminated body 5.

A resin layer D is formed by coating on a release liner E such as a PET film, and embossing is performed to prepare a first uneven layer to form a laminate 6.

After that, the release liner D of the laminated body 5 and the release liner E of the laminated body 6 are removed, and the bonding layer C of the laminated body 4 and the resin layer C of the laminated body 5 are laminated and bonded, and then the bonding layer D is bonded. And the surface of the first uneven layer of the laminated body 6 on the release liner side are laminated and bonded to form a decorative film.

Next, the release liner C of the decorative film is removed, and the bonding layer C and the three-dimensional shape base material are laminated and laminated to form a decorative laminate (molded product) in which the three-dimensional shape base material is located on the uppermost layer. ) Can be obtained.

When a molded product in which the three-dimensional shape base material is located between the first uneven layer and the reflective layer is obtained, the bonding layer D of the laminated body 5 and the three-dimensional shape base material are laminated and laminated to form a release liner. Remove D. Next, after removing the release liner E of the laminate 6, the bonding layer C of the laminate 4 and the surface of the first uneven layer of the laminate 6 on the release liner side are laminated and bonded, and then the liner C is removed. Then, the bonding layer C can be laminated and bonded to the surface opposite to the reflective layer application surface of the three-dimensional shape base material to obtain a molded product.

Additional layers, such as the upper design layer, the lower design layer, and the surface protective layer, which are arbitrary elements, can also be incorporated into the decorative laminate by appropriately combining the above-mentioned methods.

The substrate may include various materials such as polyethylene, polypropylene, (meth) acrylic resin, polycarbonate, acrylonitrile-butadiene-styrene copolymers, or blends thereof, or combinations thereof. The base material may be an inorganic material having light transmittance such as glass. The base material may contain the optional components described in the first concavo-convex layer.

The substrate may have various planar and three-dimensional shapes. The substrate is translucent or transparent. The first concavo-convex layer, and optionally, that the substrate is transparent, particularly that the total light transmittance of the substrate in the wavelength range of 400 to 700 nm is about 85% or more, about 90% or more, or about 95% or more. It is advantageous in that the second design provided by the upper design layer and the lower design layer of the above can be clearly seen. In some embodiments, the substrate comprises polycarbonate with excellent strength and transparency.

Similar to the upper design layer and the lower design layer, the base material is a color layer that exhibits a paint color, a pattern layer that represents a wood grain, a stone grain, a geometric pattern, a leather pattern, a logo, a pattern, etc. It may be a relief (relief pattern) layer provided with a shape, or a layer containing a combination thereof, and may include such a layer. The exemplified chromosphere, pattern layer, and relief layer are the same as those described for the upper design layer and the lower design layer. A decorative laminate provided with such a base material can provide a wider variety of designs.

In the decorative laminate of the present disclosure, a surface protective layer can be arranged on the outermost surface as an arbitrary element. The surface protective layer may have a substantially smooth surface, or may have an uneven shape such as an embossed pattern on the surface.

As the surface protective layer, various resins such as (meth) acrylic resin containing polymethylmethacrylate (PMMA), polyurethane, ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF), methylmethacrylate-foot Fluororesin such as vinylidene copolymer, silicone copolymer, polyvinyl chloride, polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene, polyolefin such as polypropylene, polyethylene terephthalate (PET), polyethylene naphthalate Polypolymers such as (PEN), ethylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-vinyl acetate copolymers and the like, or mixtures thereof can be used. From the viewpoint of transparency, strength, impact resistance, etc., (meth) acrylic resin, polyurethane, fluororesin, polyvinyl chloride, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer and polycarbonate can be advantageously used as the surface protective layer. .. The surface protective layer may function as a protective layer that protects other layers constituting the decorative laminate from external puncture, impact, and the like. The surface protective layer may be a multilayer laminate, for example, a multilayer extrusion laminate.

The surface protective layer may be, if necessary, an ultraviolet absorber such as benzotriazole, Tinuvin (trademark) 400 (manufactured by BASF), a hindered amine light stabilizer (HALS) such as Tinuvin (trademark) 292 (manufactured by BASF), or the like. May include. Deterioration of the layer located below the surface protective layer by using an ultraviolet absorber, a hindered amine light stabilizer, etc., for example, sensitivity to a coloring material (particularly, light such as ultraviolet rays) that can be contained in the upper design layer or the lower design layer. It is possible to effectively prevent discoloration, fading, deterioration, etc. of an organic pigment having a relatively high value. The surface protective layer may contain a hard coat material, a gloss imparting agent, and the like, and may have an additional hard coat layer. The surface protective layer is generally transparent in its entirety, but may be wholly or partially translucent or partially opaque in order to provide the desired appearance. In some embodiments, the total light transmittance of the surface protective layer in the visible region is about 85% or more, about 90% or more, or about 95% or more.

The thickness of the surface protective layer can be, for example, about 1 micrometer or more, about 5 micrometers or more, or about 10 micrometers or more, and can be about 200 micrometers or less, about 100 micrometers or less, or about 80 micrometers. It can be as follows.

In the decorative laminate of the present disclosure, any release liner can be applied as the release layer in order to protect the bonding layer, the adhesive resin layer, or the like as any element. Typical release liners include those prepared from paper (eg, kraft paper) or polymer materials (eg, polyolefins such as polyethylene and polypropylene, polyesters such as ethylene vinyl acetate, polyurethane and polyethylene terephthalate). The release liner may be coated with a silicone-containing material, a fluorocarbon-containing material, or the like, if necessary. The thickness of the release liner can generally be about 5 micrometers or more, about 15 micrometers or more, or about 25 micrometers or more, and about 300 micrometers or less, about 200 micrometers or less, or about 150 micrometers or less. be able to.

In some embodiments, the total light transmittance in the visible region of the decorative laminate can be about 3% or less, about 2.5% or less, or about 2% or less, about 0.01%. As mentioned above, it can be about 0.025% or more, about 0.03% or more, or about 0.04% or more. When the total light transmittance of the decorative laminate is within the above range, the visibility of the design provided by the first concavo-convex layer, the arbitrary lower design layer, etc. is effectively reduced in daylight, and the background is It is possible to maintain the visibility of the first concavo-convex layer, and the second design provided by a combination of an arbitrary upper design layer, lower design layer, and the like when illuminated with a light source.

In some other embodiments, the total light transmittance in the visible region of the decorative laminate can be about 12% or less, about 10% or less, or about 8% or less, about 0.01%. As mentioned above, it can be about 0.05% or more, or about 0.1% or more. When the total light transmittance of the decorative laminate is within the above range, the visibility of the design provided by the first concavo-convex layer, the arbitrary lower design layer, or the like in daylight is effectively reduced, and the background is It is possible to maintain the visibility of the second design provided by the combination of the first concavo-convex layer and any combination of the upper design layer and the lower design layer, especially when illuminated with a low-power light source.

According to one embodiment of the present disclosure, there is provided an illumination display device including a decorative laminate and a light source arranged below the first concavo-convex layer when viewed from the reflective layer of the decorative laminate. ..

The light source is not particularly limited, and various light sources such as LEDs, fluorescent lamps, incandescent lamps, and halogen lamps can be used. As a light source used in an illumination display device, it is advantageous to use an LED having high illuminance and small heat dissipation.

As the light source, a light source that emits a single color or two or more colors can be used, and examples of the colors include red (R), green (G), and blue (B). From the viewpoint of the expressiveness of the design due to the prism effect of the first uneven layer, it is preferable to use a light source that emits two or more colors, and an LED light source that emits three colors of RGB is particularly preferable.

Between the refractive index of the first concavo-convex layer and the first concavo-convex layer and the light source, from the viewpoint of facilitating the expression of a unique design by, for example, scattering, dispersing, or refracting the light from the light source by the first concavo-convex layer. The absolute value of the difference from the refractive index of the layer can be about 0.20 or more, about 0.21 or more, or about 0.22 or more, about 0.50 or less, about 0.45 or less, or It can be about 0.40 or less.

The material of the layer between the first uneven layer and the light source is not particularly limited, and may be, for example, an organic material or an inorganic material having a lower refractive index or a higher refractive index than the material constituting the first uneven layer. It may be a composite material containing well, particles having a high refractive index such as titanium oxide and zirconia, particles having a low refractive index such as fluorine particles, and a binder resin. From the viewpoint of productivity and manufacturing cost, it is advantageous that such a layer is an air layer.

From the viewpoint of facilitating the expression of a unique design by, for example, scattering, dispersing, or refracting the light from the light source by the first uneven layer, from the top of the protrusion on the light source side to the light source in the first uneven layer. The distance can be about 3 mm or more, about 5 mm or more, about 7 mm or more, or about 10 mm or more. The upper limit of the distance is not particularly limited, but may be, for example, about 30 cm or less, about 20 cm or less, about 10 cm or less, or about 5 cm or less.

The illuminance of the light source used in the illumination display device is, for example, about 0.5 lumen / m ² or more, about 0.6 lumen / m ² or more, or about 0, on a measurement surface 15 cm away from the light emitting surface of the light source. It can be 7 lumens / m ² or more, about 300 lumens / m ² or less, about 200 lumens / m ² or less, or about 100 lumens / m ² or less. The illuminance of the light source can be measured using a illuminometer in accordance with JIS C 7801: 2014 “Method of measuring the light source for general lighting”.

The illuminance of the illumination display device is, for example, about 5 lux (lp) or more, about 7 lux or more, or about 10 lux or more on the measurement surface perpendicular to the center of the surface of the decorative laminate (molded product). It can be about 32 lux or less, about 30 lux or less, about 25 lux or less, or about 20 lux or less.

The decorative laminate of the present disclosure is used for interior and / or exterior applications for decoration purposes, for example, interior or exterior members of vehicles such as cars, railways, aircraft, and ships (for example, various trim members, interior panel members). It can be used for various purposes such as home appliances and show displays.

In the following examples, specific embodiments of the present disclosure will be illustrated, but the present invention is not limited thereto. All parts and percentages are by mass unless otherwise stated.

<Example 1>
Technoroy (trademark) (manufactured by Sumitomo Chemical Co., Ltd., PMMA resin, thickness 125 micrometers) is heat-embossed with a prismatic uneven shape with a depth of 4 micrometers to form the first uneven layer. The laminated body 1 to be provided was formed. Next, a laminated film (# 7200J, manufactured by 3M Japan Ltd. (Shinagawa-ku, Tokyo, Japan)) having a release liner, a bonding layer, a polyurethane layer 1, and a tin vapor deposition layer (reflective layer) having an OD value of 1.2 in this order. )) Was prepared, and an adhesive film (# 2738, manufactured by 3M Japan Ltd. (Shinagawa-ku, Tokyo)) was applied to the tin vapor deposition layer to form the laminate 2. After applying the surface of the laminate 1 opposite to the first uneven layer to the adhesive film of the laminate 2, the release liner was removed to form the laminate 3. Here, the OD value was determined using a Gretag Macbeth D200-II densitometer.

A commercially available transparent plate was prepared, and a laminated body (molded product) was produced by applying a bonding layer of the laminated body 3 to one side of the plate.

<Example 2>
Laminated body 1 and laminated film (# 7200J, manufactured by 3M Japan Ltd. (Shinagawa-ku, Tokyo, Japan)) were prepared in the same manner as in Example 1. Polyurethane is coated on the tin-deposited layer of the laminated film and dried to prepare the polyurethane layer 2, and the tin-deposited layer is sandwiched between the polyurethane layers and has a depth of 4 to 5 micrometer from the side of the polyurethane layer 2. A second uneven layer was formed by heat embossing with an embossing type having an uneven shape. Next, polyurethane is coated on the uneven surface and dried to form a flattening layer, and then a transfer foil having an adhesive layer and a black layer (upper design layer) is applied to the flattening layer, and the black layer is further applied. An adhesive film (# 2738, manufactured by 3M Japan Ltd. (Shinagawa-ku, Tokyo, Japan)) was applied on top, and the release liner was removed to form the laminate 4. The surface of the laminated body 1 opposite to the first uneven layer was applied to the bonding layer of the laminated body 4 to form the laminated body 5.

A commercially available transparent plate was prepared, and an adhesive film of the laminate 5 was applied to one side of the plate to prepare a laminate (molded product).

<Comparative example 1>
A laminated film and a commercially available transparent plate were prepared in the same manner as in Example 1. The release liner of the laminated film was removed, and the bonding layer of the laminated film was applied to one side of the plate to prepare a laminated body (molded product) having no first uneven layer.

The laminates of Examples 1 and 2 and Comparative Example 1 were evaluated by the following procedure.

<Appearance under indoor light>
Each of the laminates of Examples 1 and 2 and Comparative Example 1 was observed under room light while being curved, and the metallic or matte tone as shown in FIG. 2 (a) or FIG. 4 (a) was determined by the reference of Table 1. Appearance under room light due to the visibility of the appearance (first design) and the prismatic appearance (second design) based on the first uneven layer as shown in FIG. 2 (b) or FIG. 4 (b). Was evaluated.

<Appearance when the LED in the dark room is lit>
An LED is arranged below the first uneven layer of the laminate of Examples 1 and 2 used for the appearance evaluation, or below the tin vapor deposition layer of the laminate of Comparative Example 1, and a dark room (simple tabletop dark room BBX-01, Entered AS ONE Corporation (Osaka City, Osaka Prefecture, Japan). As LED, LED tape light (trade name: Minger LED tape light for interior decoration, LED type 5050, output power 10W (2.5W x 4 tape), distributor: Shenzhen Minger E-comcerce Co., Ltd (People's Republic of China) (Shenzhen City, Guangdong Province)) or LED surface emitting light (LED trace stand, A4 size, output 1.8W, thickness 5mm, Minger (BestSavingBiz (People's Republic of China)) was used.

The laminated body is observed from directly above with the LED lit in a dark room, and the prismatic appearance based on the first uneven layer as shown in FIG. 2 (b) or FIG. 4 (b) is based on the reference in Table 2. The appearance of the LED in a dark room when the LED was lit was evaluated based on the clarity of (second design).

<Illuminance>
The illuminance of the light seen through the laminate when the LED was lit was determined as follows. An illuminometer (T-10M, Konica Minolta Japan Co., Ltd.) (T-10M, Konica Minolta Japan Co., Ltd.) was placed in a dark room at a position 15 cm vertically away from the center of the surface of the laminate to serve as a measurement surface. The value measured by (Minato-ku, Tokyo, Japan) was defined as the illuminance (lp).

Table 3 shows the evaluation results of Examples 1 and 2 and Comparative Example 1.

100, 200 Decorative laminate 102, 202 Light source 104, 204 First uneven layer 106, 206 Second bonding layer 207 Second resin layer 108, 208 Reflective layer 110, 210 First resin layer 211 Upper design layer 112, 212 First bonding layer 114, 214 base material

Claims (15)

0.7 to 1.7 of the first concavo-convex layer arranged on the light source side and 0.7 to 1.7 arranged on the first concavo-convex layer on the opposite side of the first concavo-convex layer to the light source. Includes a reflective layer with an OD value
A decorative laminate having the ability to transmit light from the light source. The decorative laminate according to claim 1, wherein the first uneven layer is exposed. The decorative laminate according to claim 1, wherein the first uneven layer is adjacent to a layer having an absolute value of difference from the refractive index of the first uneven layer of 0.20 or more. The decorative laminate according to any one of claims 1 to 3, wherein the depth of the uneven shape of the first uneven layer is 1 micrometer or more. The decorative laminate according to any one of claims 1 to 4, wherein the reflective layer is a vapor-deposited layer. The decorative laminate according to any one of claims 1 to 5, wherein the reflective layer has a second uneven surface. The decorative laminate according to claim 6, wherein the depth of the uneven shape on the second uneven surface is shallower than the depth of the first uneven layer. The decorative laminate according to any one of claims 1 to 7, which comprises a light-transmitting base material on the reflective layer. The decorative laminate according to any one of claims 1 to 7, further comprising a base material having light transmission between the first uneven layer and the reflective layer. The decorative laminate according to any one of claims 1 to 9, which includes an upper design layer having light transmission on the reflective layer. The decorative laminate according to any one of claims 1 to 10, further comprising a lower design layer having light transmission between the first uneven layer and the reflective layer. An illumination display device comprising a light source and a decorative laminate according to any one of claims 1 to 11 arranged on the light source. The illumination display device according to claim 12, wherein the absolute value of the difference between the refractive index of the first uneven layer and the refractive index of the layer between the first uneven layer and the light source is 0.20 or more. The illumination display device according to claim 12 or 13, which has an air layer between the first uneven layer and the light source. The illumination display device according to any one of claims 12 to 14, wherein the light source emits two or more colors.