Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
  • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
  • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
  • G09F3/02—Forms or constructions
  • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
  • G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
• • B42D2035/24—

Definitions

• the present disclosure relates to resin members including a color- shifting feature.
• Security tags or security labels are provided with characteristic appearance or semiconductor integrated circuit (IC) information, which makes the tags or labels difficult to be counterfeited or falsified.
• Some known examples of such characteristic appearance include color-shifting images, which change their color when viewed from different angles; special luminous images, which glow when exposed to light with a specific wavelength, such as ultraviolet rays and black light; and hologram images, which change their color (Japanese Patent Laid-open Publication No. H9(1997)-97011; Japanese Patent Laid-open Publication No. H8(1996)-95475; Japanese Patent Laid-open Publication No. Hl(1989)-23277).
• Fig. 1 is a sectional view showing one example of the structure of the resin member of the present disclosure.
• Fig. 2 is a sectional view showing one example of the structures of decorative films to be used in the present disclosure.
• Fig. 3 is a sectional view showing the structure of the security label of Example 1.
• the resin members of the present disclosure solve one or more of the above-mentioned existing problems.
• the resin members of the present disclosure may be used to provide security tags or security labels which excel in design and are difficult to be reproduced.
• the present disclosure provides a resin member comprising an elastic resin substrate having a three-dimensional structure in at least one surface thereof, and a decorative film comprising a color-shifting layer, the film being bonded to the surface having the three-dimensional structure.
• the resin member of the present disclosure has a three-dimensional structure, namely, a three-dimensional configuration. Therefore, a combination of the three-dimensional configuration and a color arrangement of a surface color-shifting layer can reproduce three-dimensional logo marks or the like easily and can realize a high design performance.
• the resin member of the present disclosure is an elastic article. It, therefore, can follow well to a surface of an object even if the surface is curved. Thus, it can be used in a variety of applications. Further, it is difficult to copy and analyze a three-dimensional shape. A forcible attempt of separation tends to result in fracture at the interface. It, therefore, is difficult to reproduce it.
• Fig. 1 is a sectional view showing one example of the structure of the resin member of the present disclosure.
• the resin member has a substrate 1 and a decorative film 2.
• the substrate has a three-dimensional structure 3 in its one side.
• the substrate used in the present disclosure is an article of elastic resin.
• the elastic resin excels in flexibility and is attached easily to products when being fabricated into security tags or security labels. Further, when a body comes into contact with the molded article, the article will give it only a weak impact.
• the elastic resin examples include polyurethane, polyurethane acrylate, polycarbonate, polyester, thermoplastic polyolef ⁇ n, and polyester-based thermoplastic elastomer.
• the elastic resin molded article is has a Shore A hardness of from 30 to 120, and, in some embodiments, from 40 to 100.
• the elastic resin substrate is in a sheet form and has a front surface and a back surface. At least one of the surfaces has a three-dimensional configuration with projections and/or depressions, such as patterns and sculptures.
• Typical examples of such patterns or sculptures include, but are not limited to, logo marks, brand marks, trademarks and seals of companies.
• the production of such substrates may be conducted in usual ways, for example, by pouring monomers into a mold and then polymerizing them.
• the size of the substrate varies according to the application.
• a substrate typically has a minimum thickness of about 0.5 millimeters (mm) and a maximum thickness of about 20 mm.
• a color-shifting layer for example, a color-shifting coating, is then formed on the surface having the three-dimensional structure of the molded article.
• a color-shifting coating is then formed on the surface having the three-dimensional structure of the molded article.
• such a layer enhances the beauty of the three-dimensional configuration and it has an excellent counterfeit prevention effect due to the complex color change.
• the color-shifting coating refers to a coating which forms a color-shifting layer which changes its color variously depending on the viewing angle or the incidence conditions of light.
• the color-shifting coating includes flake-shaped pigments with a multilayer structure. A spectral effect caused by the multilayer structure generates an interferential wavelength, as a result, the color of the coating changes. Examples of such a color-shifting coating include "MAZIORA
• a decorative film 2 containing the color-shifting coating is bonded onto the surface having the three-dimensional structure of the molded article as shown in Fig. 1.
• Fig. 2 is a sectional view showing one example of the structures of decorative films to be used in the present disclosure.
• the decorative film has a thermoplastic resin layer 4 and a color-shifting layer 5.
• the thermoplastic resin layer 4 may not be essential.
• the color-shifting layer 5 may further have thereon a decal layer or a protective layer.
• a uniform coated film is formed on the three-dimensional structure of the molded article.
• the thermoplastic resin layer can be shaped by heating to have a desired three-dimensional shape.
• the thickness of the decorative film is from 1 to 500 micrometers ( ⁇ m), and preferably from 5 to 300 ⁇ m. If the decorative film has a thickness less than 1 ⁇ m, the decorative effect may be insufficient or the film may have a reduced strength and, as a result, the film may easily peel off from the surface of the molded article.
• thermoplastic resin layer examples include films of polyethylene terephthalate, polyolefm, polyurethane, polyacrylate, polyurethane acrylate, polyvinyl chloride, nylon, EVA, polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), perfluoroalkoxyalkane (PFA), and polyvinylidene fluoride (PVDF).
• the thickness of the thermoplastic resin layer is from 50 to 250 ⁇ m.
• the method for bonding the decorative film to the molded article is not particularly limited.
• a layer of an adhesive or pressure-sensitive adhesive is provided on the contact surface of the decorative film beforehand and then the decorative film is stuck on the molded article.
• Another possible method includes molding a decorative film, and then filling an elastic resin in the molded decorative film, followed by solidification of the resin.
• the method of molding a decorative film including a thermoplastic film by use of a mold is disclosed, for example, in Japanese Patent Laid-open Publication No. H5(1993)-269883.
• the resulting resin member is used for security tags or security labels.
• a layer of a pressure-sensitive adhesive or adhesive is formed on the back surface of the resin member, if necessary.
• the resin member may also be provided with a film-shaped electronic circuit on its back surface and be used as an RFID tag or the like.
• Fig. 3 is a sectional view showing the structure of the security label of this example. After stirring of the materials given in Table 1, the resulting mixture was poured into a mold and subjected to polymerization by heating. Thus, a urethane resin molded article 6 with a logo on its surface was obtained. The molded article obtained is a sheet with a minimum thickness of 1.0 mm and a maximum thickness of 2.0 mm.
• a decorative film 7 ("color-shift PET film” manufactured by 3M, thickness 100 ⁇ m) was shaped in conformity with the form of the logo and then was attached onto the logo of the molded article 6.
• the security label obtained followed a curved surface well and adhered thereto.
• Example 1 On the adhesive surface of the security label obtained in Example 1, a non-contact film-like electronic circuit manufactured by FUJITSU, Ltd. was laminated to yield an RFID tag.
• the security labels and RFID obtained in Example 1 and 2 have great performances of design and security and are difficult to imitate.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

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Family Applications (1)

Country Status (3)

Cited By (1)

Citations (6)

• 2006
  • 2006-07-26 JP JP2006203166A patent/JP2008030226A/ja not_active Withdrawn
• 2007
  • 2007-07-24 TW TW096126965A patent/TW200812799A/zh unknown
  • 2007-07-24 WO PCT/US2007/074151 patent/WO2008057638A2/en active Application Filing

Patent Citations (6)

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