US20140141182A1 - Identification device having antimicrobial properties - Google Patents
Identification device having antimicrobial properties Download PDFInfo
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- US20140141182A1 US20140141182A1 US14/165,918 US201414165918A US2014141182A1 US 20140141182 A1 US20140141182 A1 US 20140141182A1 US 201414165918 A US201414165918 A US 201414165918A US 2014141182 A1 US2014141182 A1 US 2014141182A1
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- Prior art keywords
- identification device
- silver
- direct thermal
- layer
- antimicrobial
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0208—Tissues; Wipes; Patches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/337—Additives; Binders
- B41M5/3377—Inorganic compounds, e.g. metal salts of organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/41—Base layers supports or substrates
-
- 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
- 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
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
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- 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
-
- 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
- G09F3/005—Identification bracelets, e.g. secured to the arm of a person
-
- 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
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
- G09F7/02—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/04—Direct thermal recording [DTR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/40—Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/32—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers one component being a heavy metal compound, e.g. lead or iron
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
Definitions
- the present invention is directed to an identification device, preferably a wristband or an adhesive label, comprising a direct thermal printable surface having antimicrobial properties.
- the identification device is configured for receiving identification information by means of a direct thermal printer and having antimicrobial properties without the use of a protective layer or overcoat on top of the direct thermal layer.
- Direct thermal printable media is used in printers and in other applications requiring permanent imaging such as wristbands, tags, labels and other identification media.
- direct thermal printing uses a special printable media that incorporates a color developing mechanism. Images are formed by exposing the color developing mechanism to concentrations of heat that produce localized chemical reactions involving a change of color (usually light to dark).
- the color developing mechanism is provided by a thermosensitive imaging material containing heat reactive chemicals such as leuco dyes or metallic salts.
- thermosensitive imaging material is typically applied as a layer on top of a substrate surface. Printing takes place by exposing the coating to a pattern of heat conducted from a thermal print head located adjacent to the substrate surface containing the coating of thermosensitive imaging material.
- Silver-containing inorganic microbiocides have recently been developed and utilized as antimicrobial agents on and within a plethora of different substrates and surfaces.
- microbiocides have been adapted for incorporation within plastic compositions and fibers in order to provide household and consumer products which inherently exhibit antimicrobial characteristics.
- silver-based agents provide suitable antimicrobial properties within thermoplastic articles, and other types of articles, there are certain limitations as to the potential antimicrobial efficacy of such thermoplastic articles. Such limitations are apparently due to relatively low amounts of surface-available silver within and/or on such thermoplastic articles. Without intending to be bound to any specific scientific theory, it is believed that such low surface-available amounts of silver are the result of the inability of a sufficient amount of the integrated silver compounds to migrate to the thermoplastic surface.
- thermoplastics comprising silver-containing antimicrobials.
- silver-containing antimicrobial agents within thermoplastic compositions that exhibit such heretofore unattainable high levels of surface-available silver compounds, thereby providing more effective antimicrobial activity, among other potential desirable characteristics as a result thereof.
- Past plastic compositions and articles comprising silver-containing antimicrobial agents include U.S. Pat. No. 5,405,644 to Ohsumi et al., which includes the addition of certain triazoles; U.S. Pat. No. 4,938,955 to Niira, et al. (also including benzotriazole stabilizers); U.S. Pat. No. 5,750,609 to Nosu et al., which discloses an ultraviolet protective agent for incorporation within a variety of compositions, such as films, fibers, cosmetics, and the like, comprising a zinc-based hydrotalcite which acts solely as an ultraviolet absorber.
- Another such prior art product includes the Zebra antimicrobial wristband.
- the Zebra product has the antimicrobial material within a varnish applied on top of the direct thermal material in a secondary process as disclosed in U.S. Patent Publication No. 2006/0248767.
- There are several disadvantages to using an antimicrobial varnish as in the Zebra product including: inconsistent printing due to variation in the varnish thickness, discoloration of the varnish when exposed to UV light, shorter print head life, build-up of the varnish on printer rollers, and relatively lower speeds/higher heat energy requirement for the printing process.
- an identification device configured for receiving identifying indicia by means of a direct thermal printer and that exhibits antimicrobial properties without the associated disadvantages of an overcoat or varnish.
- the present invention fulfills these needs and provides other related advantages.
- the present invention is directed to an identification device such as a label or a wristband that has a direct thermal reactive layer with inherent antimicrobial properties achieved without the use of a coating or varnish over the direct thermal reactive layer.
- the inherent antimicrobial properties are achieved by embedding an antimicrobial additive into the direct thermal reactive layer itself. In this way, the direct thermal reactive layer does not require a varnish or overcoat to protect the identification device by inhibiting bacterial growth on the surface of the label or wristband.
- the identification device includes a wristband or a label having a direct thermal face stock that has antimicrobial properties without the requirement of an additional coating or varnish layer to protect against microbial growth.
- the antimicrobial properties are achieved by embedding an antimicrobial additive directly into the direct thermal layer chemistry during manufacture of the direct thermal face stock.
- the antimicrobial additives may include an aqueous dispersion of silver chloride-coated titanium dioxide particles. The inorganic nature, small particle size, and high temperature tolerance of this “non-nano silver” antimicrobial chemistry makes it ideal for use in a wide range of printing applications.
- the antimicrobial direct thermal layer of an inventive identification device such as a wristband or label provides for a release of silver ions on demand, which safely inhibit bacterial growth on the identification device.
- inventive configuration such as: no need for a varnish or overcoat to provide antimicrobial protection, a longer print head life, lower energies and higher speeds for printing processes, no buildup on the printer rollers, as well as consistent printability, scanability and readability.
- An identification device has an exposed direct thermal layer with inherent antimicrobial properties.
- “exposed” means that the direct thermal layer is the top most layer on the identification device, without a varnish or overcoat, such that it is exposed to the environment. Because the direct thermal layer is exposed, it comes into direct contact with environmental elements, i.e., air, water, fluids, dust, dirt, etc.
- the identification device such as a bracelet or a label, has a substrate and an exposed direct thermal layer bonded to the substrate by an adhesive.
- An antimicrobial material is embedded within the direct thermal layer so as to impart antimicrobial properties thereto.
- the antimicrobial material preferably comprises an inorganic silver-containing compound, which may include silver chloride-coated titanium dioxide, silver zirconium phosphate, a silver substituted zeolite, or silver-containing glass particles. In the case of the silver chloride-coated titanium dioxide, it is preferably prepared in an aqueous dispersion.
- the antimicrobial material preferably comprises 0.01% to 10% by weight of the identification device, and more preferably 0.5% to 2% by weight of the identification device.
- the direct thermal layer preferably includes, from bottom to top: a base layer, an under layer, a thermal reactive layer; and a barrier layer, wherein the antimicrobial material is dispersed throughout the barrier layer.
- the base layer may be paper, face stock, label stock, or polymer material, such as polypropylene, polyethylene, or polyester.
- the substrate of the identification device may be made from glassine, polycoated kraft, calendared kraft, a thermoplastic elastomer, polypropylene, polyethylene, polyethylene terephthalate, polystyrene or a multilayer combination thereof.
- a release coating may be included between the substrate and the adhesive so as to make the substrate separable from the direct thermal layer.
- FIG. 1 illustrates the laminated construction of the wristband of the present invention
- FIG. 2 illustrates the laminated construction of an adhesive label of the present invention
- FIG. 3 illustrates the layered construction of the direct thermal layer of the present invention.
- the present invention is directed to an identification device, preferably a bracelet or an adhesive label, having an exposed direct thermal layer configured for receiving identifying indicia by means of a direct thermal printer.
- the direct thermal layer also contains an antimicrobial additive that inhibits the growth of bacteria on the surface of the identification device.
- antimicrobial additives preferably increase the surface available silver on the identification device.
- “bracelet” means a looped device configured to encircle a wrist, ankle or other appendage of a person. Examples include wristbands, anklets and similar devices.
- any plastic in which a silver-based antimicrobial agent may be properly incorporated can be utilized in this invention.
- polyolefins such as polyethylene, polypropylene, and polybutylene, styrenics, such as polystyrene, ABS, and the like, and polyesters, such as polyethylene terephthalate, may be utilized within this invention.
- the plastic is a thermoplastic that can be molded into different shapes and sizes upon extrusion with the silver-containing antimicrobial.
- polyolefins, particularly polypropylene, and styrenics, particularly polystyrene are preferred.
- plastics preferably may be colored to provide other aesthetic features for the end user.
- the plastic may also comprise colorants, such as, for example, poly(oxyalkylenated) colorants, pigments, dyes, and the like, too.
- Other additives may also be present, including antistatic agents, brightening compounds, nucleating agents, clarifying agents, lubricants, flame retardants, antioxidants, UV stabilizers, fillers, and the like.
- the identification device 10 of the present invention is a laminated structure as generally depicted in FIGS. 1 and 2 and may come in the form of a wristband 12 or an adhesive label 18 .
- the identification device 10 may be embodied in other structures besides the wristband and label as described herein.
- the laminated layers of the various figures are illustrated in exaggerated thicknesses for clarity and ease of explanation. In actual construction, the layers have thicknesses typical in laminated constructions of the type described herein.
- the wristband 12 is illustrated with a substrate layer 14 with an adhesive layer 16 disposed thereon and an exposed direct thermal layer 30 on top of that.
- the direct thermal layer 30 is exposed means that it is not covered by a varnish or overcoat and capable of coming into contact with environmental contaminants.
- the adhesive layer 16 secures the direct thermal layer 30 to the substrate layer 14 forming the described laminate.
- the substrate 14 may take the form of a synthetic monolayer comprising thermoplastic elastomers (TPEs), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or polystyrene (PS).
- the substrate 14 may comprise a synthetic multilayer or a prelaminated polymeric structure including a combination of TPE, PP, PE, PET, and/or PS.
- the adhesive layer 16 may comprise a water-based adhesive, a UV-based adhesive, or a hot melt adhesive. The construction of the direct thermal layer 30 will be described more fully below.
- FIG. 2 illustrates a sample construction for a label 18 .
- the label 18 includes, in order from bottom to top, a liner layer 20 , a release coating 22 , an adhesive layer 24 and the direct thermal layer 30 .
- the liner layer 20 may comprise a synthetic material, such as PP, PET, PE or similar materials, glassine, polycoated kraft, or calendared kraft.
- the release coating 22 may comprise a solventless silicone, an emulsion silicone, or a solvent silicone.
- the adhesive layer 24 of the label 18 may comprise a water-based adhesive, a UV-based adhesive, or a hot melt adhesive.
- the direct thermal layer 30 of the label 18 is as described below.
- FIG. 3 illustrates the construction of the novel direct thermal layer 30 of the present invention.
- the direct thermal layer 30 starts with a base layer 32 that may comprise paper material, synthetic material, face stock, or label stock.
- the synthetic material may comprise PP, PE, polyester, or similar polymeric compounds.
- An under layer 34 is deposited on top of the base layer 32 .
- the under layer 34 provides heat insulation and bonding enhancement for the construction of the direct thermal layer 30 and is the primary layer responsible for providing a smooth surface.
- a thermal reactive layer 36 is deposited on top of the under layer 34 .
- the thermal reactive layer 36 is the portion of the direct thermal layer 30 that provides the imaging in response to the thermal print head.
- the thermal reactive layer 36 includes thermal imaging particles and thermal image preservation materials.
- the thermal imaging layer 36 is a construction known in the art and includes color formers, co-reactants, desensitizers, dispersants, defoamers, lubricants, and such other compounds as are known to those skilled in the art.
- the thermal image preservation materials include pigments, binders and such other materials as are known to aid in image preservation.
- a barrier layer 38 is deposited on top of the thermal reactive layer 36 .
- the barrier layer 38 preserves the direct thermal layer 30 against moisture, hand sanitizer, alcohol and other such solvents.
- the barrier layer 38 also acts as a thermal printer head matching layer to achieve even and uniform imaging on the underlying thermal reactive layer 36 .
- the barrier layer 38 has embedded therein antimicrobial particles 40 configured to release silver ions as described herein.
- the antimicrobial particles 40 are dispersed throughout the barrier layer 38 and preferably comprise an aqueous dispersion of silver chloride-coated titanium dioxide particles.
- Another preferred silver-containing antimicrobial is an inorganic silver-containing compound, including, without limitation, inorganic compounds such as silver zirconium phosphates available from Milliken & Company under the tradename ALPHASAN® RC-2000, RC-5000, and RC-7000, although any silver-containing inorganic antimicrobial agent may also be utilized within the inventive plastic article (for instance, as mere examples, a silver substituted zeolite available from Shingawa under the tradename ZEOMIC®, and silver-containing glasses, such as IONPURE® from Ishizuka Glass under the tradename IONPURE®, as well as AMP® T558 and MICROFREE®, both available from DuPont, as well as JMAC®, available from Johnson Mathey).
- such an antimicrobial is added in an amount of from about 0.01 to 10% by total weight of the target plastic composition; more preferably from about 0.05 to about 2.0%; and most preferably from about 0.5 to about 2.0%.
Abstract
An identification device, preferably a wristband or adhesive label, is configured to receive identifying indicia by means of a direct thermal printer. A direct thermal layer includes antimicrobial particles embedded therein and is exposed, i.e., does not have a protective overcoat or varnish covering the direct thermal layer. The antimicrobial particles increase the surface available silver ions and are preferably formed of an aqueous dispersion of silver chloride-coated titanium dioxide particles. The antimicrobial particles may also be formed of an inorganic silver-containing compound such as silver zirconium phosphates or a silver substituted zeolite.
Description
- The present invention is directed to an identification device, preferably a wristband or an adhesive label, comprising a direct thermal printable surface having antimicrobial properties. Specifically, the identification device is configured for receiving identification information by means of a direct thermal printer and having antimicrobial properties without the use of a protective layer or overcoat on top of the direct thermal layer.
- Direct thermal printable media is used in printers and in other applications requiring permanent imaging such as wristbands, tags, labels and other identification media. In contrast to printing technologies that involve the transfer of ink from one location to another, direct thermal printing uses a special printable media that incorporates a color developing mechanism. Images are formed by exposing the color developing mechanism to concentrations of heat that produce localized chemical reactions involving a change of color (usually light to dark). The color developing mechanism is provided by a thermosensitive imaging material containing heat reactive chemicals such as leuco dyes or metallic salts.
- Since direct thermal printing only involves the transfer of heat, printing of direct thermal media is simple and clean. Other advantages include low cost, low noise, and high speed. The thermosensitive imaging material is typically applied as a layer on top of a substrate surface. Printing takes place by exposing the coating to a pattern of heat conducted from a thermal print head located adjacent to the substrate surface containing the coating of thermosensitive imaging material.
- There has been a great deal of attention in recent years given to the hazards of bacterial contamination from potential everyday exposure. Noteworthy examples of such concern include the fatal consequences of food poisoning due to certain strains of Eschericia coli being found within undercooked beef in fast food restaurants; Salmonella contamination causing sicknesses from undercooked and unwashed poultry food products; and illnesses and skin infections attributed to Staphylococcus aureus, yeast, and other unicellular organisms. With such an increased consumer interest in this area, manufacturers have begun introducing antimicrobial agents within various products and articles.
- Silver-containing inorganic microbiocides have recently been developed and utilized as antimicrobial agents on and within a plethora of different substrates and surfaces. In particular, such microbiocides have been adapted for incorporation within plastic compositions and fibers in order to provide household and consumer products which inherently exhibit antimicrobial characteristics. Although such silver-based agents provide suitable antimicrobial properties within thermoplastic articles, and other types of articles, there are certain limitations as to the potential antimicrobial efficacy of such thermoplastic articles. Such limitations are apparently due to relatively low amounts of surface-available silver within and/or on such thermoplastic articles. Without intending to be bound to any specific scientific theory, it is believed that such low surface-available amounts of silver are the result of the inability of a sufficient amount of the integrated silver compounds to migrate to the thermoplastic surface. Such a result is observed for standard thermoplastics comprising silver-containing antimicrobials. Thus, there exists a need to provide efficacious amounts of silver-containing antimicrobial agents within thermoplastic compositions that exhibit such heretofore unattainable high levels of surface-available silver compounds, thereby providing more effective antimicrobial activity, among other potential desirable characteristics as a result thereof.
- Past plastic compositions and articles comprising silver-containing antimicrobial agents include U.S. Pat. No. 5,405,644 to Ohsumi et al., which includes the addition of certain triazoles; U.S. Pat. No. 4,938,955 to Niira, et al. (also including benzotriazole stabilizers); U.S. Pat. No. 5,750,609 to Nosu et al., which discloses an ultraviolet protective agent for incorporation within a variety of compositions, such as films, fibers, cosmetics, and the like, comprising a zinc-based hydrotalcite which acts solely as an ultraviolet absorber. However, these particular methods and plastics have proven to be costly (with the high expense of benzotriazoles initially), particularly since relatively high concentrations of the expensive stabilizing compounds are required, and do not provide any appreciable increase of available silver on the surface of such articles. Also, as these stabilizers are not thermally stable, they introduce additional processing complications. As such, there is no teaching or fair suggestion within the prior art which pertains to the needed improvement in increasing the amounts of surface-available silver compounds on target thermoplastics.
- Another such prior art product includes the Zebra antimicrobial wristband. The Zebra product has the antimicrobial material within a varnish applied on top of the direct thermal material in a secondary process as disclosed in U.S. Patent Publication No. 2006/0248767. There are several disadvantages to using an antimicrobial varnish as in the Zebra product, including: inconsistent printing due to variation in the varnish thickness, discoloration of the varnish when exposed to UV light, shorter print head life, build-up of the varnish on printer rollers, and relatively lower speeds/higher heat energy requirement for the printing process.
- Accordingly, there is a need for an identification device configured for receiving identifying indicia by means of a direct thermal printer and that exhibits antimicrobial properties without the associated disadvantages of an overcoat or varnish. The present invention fulfills these needs and provides other related advantages.
- The present invention is directed to an identification device such as a label or a wristband that has a direct thermal reactive layer with inherent antimicrobial properties achieved without the use of a coating or varnish over the direct thermal reactive layer. The inherent antimicrobial properties are achieved by embedding an antimicrobial additive into the direct thermal reactive layer itself. In this way, the direct thermal reactive layer does not require a varnish or overcoat to protect the identification device by inhibiting bacterial growth on the surface of the label or wristband.
- In a particular embodiment, the identification device includes a wristband or a label having a direct thermal face stock that has antimicrobial properties without the requirement of an additional coating or varnish layer to protect against microbial growth. The antimicrobial properties are achieved by embedding an antimicrobial additive directly into the direct thermal layer chemistry during manufacture of the direct thermal face stock. The antimicrobial additives may include an aqueous dispersion of silver chloride-coated titanium dioxide particles. The inorganic nature, small particle size, and high temperature tolerance of this “non-nano silver” antimicrobial chemistry makes it ideal for use in a wide range of printing applications. The antimicrobial direct thermal layer of an inventive identification device such as a wristband or label provides for a release of silver ions on demand, which safely inhibit bacterial growth on the identification device. There are numerous advantages to this inventive configuration, such as: no need for a varnish or overcoat to provide antimicrobial protection, a longer print head life, lower energies and higher speeds for printing processes, no buildup on the printer rollers, as well as consistent printability, scanability and readability.
- An identification device according to the present invention has an exposed direct thermal layer with inherent antimicrobial properties. In reference to the direct thermal layer, “exposed” means that the direct thermal layer is the top most layer on the identification device, without a varnish or overcoat, such that it is exposed to the environment. Because the direct thermal layer is exposed, it comes into direct contact with environmental elements, i.e., air, water, fluids, dust, dirt, etc.
- The identification device, such as a bracelet or a label, has a substrate and an exposed direct thermal layer bonded to the substrate by an adhesive. An antimicrobial material is embedded within the direct thermal layer so as to impart antimicrobial properties thereto. The antimicrobial material preferably comprises an inorganic silver-containing compound, which may include silver chloride-coated titanium dioxide, silver zirconium phosphate, a silver substituted zeolite, or silver-containing glass particles. In the case of the silver chloride-coated titanium dioxide, it is preferably prepared in an aqueous dispersion. The antimicrobial material preferably comprises 0.01% to 10% by weight of the identification device, and more preferably 0.5% to 2% by weight of the identification device.
- The direct thermal layer preferably includes, from bottom to top: a base layer, an under layer, a thermal reactive layer; and a barrier layer, wherein the antimicrobial material is dispersed throughout the barrier layer. The base layer may be paper, face stock, label stock, or polymer material, such as polypropylene, polyethylene, or polyester. The substrate of the identification device may be made from glassine, polycoated kraft, calendared kraft, a thermoplastic elastomer, polypropylene, polyethylene, polyethylene terephthalate, polystyrene or a multilayer combination thereof. A release coating may be included between the substrate and the adhesive so as to make the substrate separable from the direct thermal layer.
- Other features and advantages of the present invention will become apparent from the following more detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.
- The accompanying drawings illustrate the invention. In such drawings:
-
FIG. 1 illustrates the laminated construction of the wristband of the present invention; -
FIG. 2 illustrates the laminated construction of an adhesive label of the present invention; and -
FIG. 3 illustrates the layered construction of the direct thermal layer of the present invention. - The present invention is directed to an identification device, preferably a bracelet or an adhesive label, having an exposed direct thermal layer configured for receiving identifying indicia by means of a direct thermal printer. The direct thermal layer also contains an antimicrobial additive that inhibits the growth of bacteria on the surface of the identification device. Such antimicrobial additives preferably increase the surface available silver on the identification device. In this invention, “bracelet” means a looped device configured to encircle a wrist, ankle or other appendage of a person. Examples include wristbands, anklets and similar devices.
- Nowhere within the prior art has such a specific plastic article or method of making thereof been disclosed, utilized, or fairly suggested to produce a thermoplastic article with such desirable increased surface-available silver characteristics.
- Any plastic in which a silver-based antimicrobial agent may be properly incorporated can be utilized in this invention. For instance, and without intending any limitations therein, polyolefins, such as polyethylene, polypropylene, and polybutylene, styrenics, such as polystyrene, ABS, and the like, and polyesters, such as polyethylene terephthalate, may be utilized within this invention. Preferably, the plastic is a thermoplastic that can be molded into different shapes and sizes upon extrusion with the silver-containing antimicrobial. Thus, polyolefins, particularly polypropylene, and styrenics, particularly polystyrene, are preferred. Furthermore, such plastics preferably may be colored to provide other aesthetic features for the end user. Thus, the plastic may also comprise colorants, such as, for example, poly(oxyalkylenated) colorants, pigments, dyes, and the like, too. Other additives may also be present, including antistatic agents, brightening compounds, nucleating agents, clarifying agents, lubricants, flame retardants, antioxidants, UV stabilizers, fillers, and the like.
- The
identification device 10 of the present invention is a laminated structure as generally depicted inFIGS. 1 and 2 and may come in the form of awristband 12 or anadhesive label 18. Theidentification device 10 may be embodied in other structures besides the wristband and label as described herein. The laminated layers of the various figures are illustrated in exaggerated thicknesses for clarity and ease of explanation. In actual construction, the layers have thicknesses typical in laminated constructions of the type described herein. - In
FIG. 1 , thewristband 12 is illustrated with a substrate layer 14 with anadhesive layer 16 disposed thereon and an exposed directthermal layer 30 on top of that. To say that the directthermal layer 30 is exposed means that it is not covered by a varnish or overcoat and capable of coming into contact with environmental contaminants. In this construction, theadhesive layer 16 secures the directthermal layer 30 to the substrate layer 14 forming the described laminate. The substrate 14, may take the form of a synthetic monolayer comprising thermoplastic elastomers (TPEs), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or polystyrene (PS). Alternatively, the substrate 14 may comprise a synthetic multilayer or a prelaminated polymeric structure including a combination of TPE, PP, PE, PET, and/or PS. Theadhesive layer 16 may comprise a water-based adhesive, a UV-based adhesive, or a hot melt adhesive. The construction of the directthermal layer 30 will be described more fully below. -
FIG. 2 illustrates a sample construction for alabel 18. In this construction, thelabel 18 includes, in order from bottom to top, aliner layer 20, a release coating 22, anadhesive layer 24 and the directthermal layer 30. Theliner layer 20 may comprise a synthetic material, such as PP, PET, PE or similar materials, glassine, polycoated kraft, or calendared kraft. The release coating 22 may comprise a solventless silicone, an emulsion silicone, or a solvent silicone. As with thewristband 12, theadhesive layer 24 of thelabel 18 may comprise a water-based adhesive, a UV-based adhesive, or a hot melt adhesive. The directthermal layer 30 of thelabel 18 is as described below. -
FIG. 3 illustrates the construction of the novel directthermal layer 30 of the present invention. In this construction, the directthermal layer 30 starts with abase layer 32 that may comprise paper material, synthetic material, face stock, or label stock. The synthetic material may comprise PP, PE, polyester, or similar polymeric compounds. An underlayer 34 is deposited on top of thebase layer 32. The underlayer 34 provides heat insulation and bonding enhancement for the construction of the directthermal layer 30 and is the primary layer responsible for providing a smooth surface. - A thermal
reactive layer 36 is deposited on top of theunder layer 34. The thermalreactive layer 36 is the portion of the directthermal layer 30 that provides the imaging in response to the thermal print head. The thermalreactive layer 36 includes thermal imaging particles and thermal image preservation materials. Thethermal imaging layer 36 is a construction known in the art and includes color formers, co-reactants, desensitizers, dispersants, defoamers, lubricants, and such other compounds as are known to those skilled in the art. The thermal image preservation materials include pigments, binders and such other materials as are known to aid in image preservation. Finally, abarrier layer 38 is deposited on top of the thermalreactive layer 36. - The
barrier layer 38 preserves the directthermal layer 30 against moisture, hand sanitizer, alcohol and other such solvents. Thebarrier layer 38 also acts as a thermal printer head matching layer to achieve even and uniform imaging on the underlying thermalreactive layer 36. Thebarrier layer 38 has embedded thereinantimicrobial particles 40 configured to release silver ions as described herein. Theantimicrobial particles 40 are dispersed throughout thebarrier layer 38 and preferably comprise an aqueous dispersion of silver chloride-coated titanium dioxide particles. - Another preferred silver-containing antimicrobial is an inorganic silver-containing compound, including, without limitation, inorganic compounds such as silver zirconium phosphates available from Milliken & Company under the tradename ALPHASAN® RC-2000, RC-5000, and RC-7000, although any silver-containing inorganic antimicrobial agent may also be utilized within the inventive plastic article (for instance, as mere examples, a silver substituted zeolite available from Shingawa under the tradename ZEOMIC®, and silver-containing glasses, such as IONPURE® from Ishizuka Glass under the tradename IONPURE®, as well as AMP® T558 and MICROFREE®, both available from DuPont, as well as JMAC®, available from Johnson Mathey). Generally, such an antimicrobial is added in an amount of from about 0.01 to 10% by total weight of the target plastic composition; more preferably from about 0.05 to about 2.0%; and most preferably from about 0.5 to about 2.0%.
- Although several embodiments have been described in detail for purposes of illustration, various modifications may be made without departing from the scope and spirit of the invention.
Claims (16)
1. An identification device having an exposed direct thermal layer with inherent antimicrobial properties, comprising:
a substrate;
an exposed direct thermal layer bonded to the substrate by an adhesive and configured to receive identifying indicia by direct thermal printing; and
an antimicrobial material embedded within the direct thermal layer so as to impart antimicrobial properties thereto.
2. The identification device of claim 1 , wherein the identification device comprises a bracelet or a label.
3. The identification device of claim 2 , wherein the direct thermal layer comprises a base layer of paper, face stock, label stock, or polymer material.
4. The identification device of claim 3 , wherein the substrate comprises glassine, polycoated kraft, calendared kraft, a thermoplastic elastomer, polypropylene, polyethylene, polyethylene terephthalate, polystyrene or a multilayer combination thereof.
5. The identification device any of claims 1 -4, wherein the antimicrobial material comprises an inorganic silver-containing compound.
6. The identification device of claim 5 , wherein the inorganic silver-containing compound comprises silver chloride-coated titanium dioxide, silver zirconium phosphate, a silver substituted zeolite, or silver-containing glass particles.
7. The identification device of claim 6 , wherein the silver chloride-coated titanium dioxide is an aqueous dispersion.
8. The identification device any of claims 1 -4, wherein the antimicrobial material comprises 0.01% to 10% by weight of the identification device.
9. The identification device of claim 8 , wherein the antimicrobial material comprises 0.5% to 2% by weight of the identification device.
10. An identification device having an exposed direct thermal layer with inherent antimicrobial properties, comprising:
a substrate;
an exposed direct thermal layer bonded to the substrate by an adhesive and configured to receive identifying indicia by direct thermal printing; and
an inorganic silver-containing compound embedded within the direct thermal layer so as to impart antimicrobial properties thereto, wherein the inorganic silver-containing compound comprises 0.01% to 10% by weight of the identification device.
11. The identification device of claim 10 , wherein the silver chloride-coated titanium dioxide is an aqueous dispersion.
12. The identification device of claim 11 , wherein the inorganic silver-containing compound comprises silver chloride-coated titanium dioxide, silver zirconium phosphate, a silver substituted zeolite, or silver-containing glass particles.
13. The identification device of claim 11 , wherein the inorganic silver-containing compound comprises 0.5% to 2% by weight of the identification device.
14. The identification device of claim 11 , wherein the direct thermal layer comprises a base layer of paper, face stock, label stock, or polymer material.
15. The identification device of claim 11 , wherein the substrate comprises glassine, polycoated kraft, calendared kraft, a thermoplastic elastomer, polypropylene, polyethylene, polyethylene terephthalate, polystyrene or a multilayer combination thereof.
16. The identification device of claim 11 , wherein the identification device comprises a bracelet or a label.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/165,918 US20140141182A1 (en) | 2011-10-24 | 2014-01-28 | Identification device having antimicrobial properties |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161550685P | 2011-10-24 | 2011-10-24 | |
US13/658,197 US8840978B2 (en) | 2011-10-24 | 2012-10-23 | Identification device having antimicrobial properties |
US14/165,918 US20140141182A1 (en) | 2011-10-24 | 2014-01-28 | Identification device having antimicrobial properties |
Related Parent Applications (1)
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US13/658,197 Continuation US8840978B2 (en) | 2011-10-24 | 2012-10-23 | Identification device having antimicrobial properties |
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US20140141182A1 true US20140141182A1 (en) | 2014-05-22 |
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US13/658,197 Active US8840978B2 (en) | 2011-10-24 | 2012-10-23 | Identification device having antimicrobial properties |
US14/165,918 Abandoned US20140141182A1 (en) | 2011-10-24 | 2014-01-28 | Identification device having antimicrobial properties |
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US13/658,197 Active US8840978B2 (en) | 2011-10-24 | 2012-10-23 | Identification device having antimicrobial properties |
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US (2) | US8840978B2 (en) |
EP (1) | EP2771875B1 (en) |
AU (1) | AU2012329005B2 (en) |
CA (1) | CA2853096C (en) |
ES (1) | ES2662037T3 (en) |
PL (1) | PL2771875T3 (en) |
WO (1) | WO2013063026A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107225883A (en) * | 2017-06-22 | 2017-10-03 | 河南卓立膜材料股份有限公司 | One kind decoration antibacterial type heat transfer film and preparation method thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9954461B1 (en) | 2017-06-12 | 2018-04-24 | Power Integrations, Inc. | Multiple stage gate drive for cascode current sensing |
US11699362B2 (en) | 2020-05-18 | 2023-07-11 | Precision Dynamics Corporation | Self-expiring identification bands and methods of use thereof |
CN113386421B (en) * | 2021-06-26 | 2022-09-23 | 苏州星辰排版印刷有限公司 | Glass panel and production process thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6361839B1 (en) * | 1995-07-31 | 2002-03-26 | National Ink Incorporated | Hot stamping foil and process |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4260677A (en) | 1976-03-12 | 1981-04-07 | Minnesota Mining And Manufacturing Company | Thermographic and photothermographic materials having silver salt complexes therein |
US4504575A (en) | 1983-10-31 | 1985-03-12 | E. I. Du Pont De Nemours And Company | Heat-developable film containing silver sulfonate physical developer |
GB8616294D0 (en) | 1986-07-03 | 1986-08-13 | Johnson Matthey Plc | Antimicrobial compositions |
JPS63265958A (en) | 1987-04-22 | 1988-11-02 | Shinagawa Nenryo Kk | Antibacterial resin composition |
US5536696A (en) | 1992-11-16 | 1996-07-16 | Agfa-Gevaert N.V. | Direct thermal imaging material |
JP3201023B2 (en) | 1992-11-17 | 2001-08-20 | 東亞合成株式会社 | Manufacturing method of antibacterial synthetic fiber |
AU701182B2 (en) | 1995-04-10 | 1999-01-21 | Kyowa Chemical Industry Co., Ltd. | Ultraviolet protective agent |
JPH09274435A (en) | 1996-04-03 | 1997-10-21 | Dynic Corp | Label for antimicrobial clothes |
KR100475421B1 (en) | 1996-05-10 | 2005-05-16 | 도요 보세키 가부시키가이샤 | Antimicrobial composition and antimicrobial laminate |
US6641842B2 (en) | 2001-12-12 | 2003-11-04 | Milliken & Company | Thermoplastic articles exhibiting high surface-available silver |
JP2006502029A (en) * | 2002-10-02 | 2006-01-19 | ジェネラル・データ・カンパニー・インコーポレイテッド | Thermosensitive recording material and method for producing and using the same |
EP1677595B1 (en) | 2003-10-24 | 2013-03-27 | Avery Dennison Corporation | Antimicrobial composites, films, labelstocks and labels |
US10251392B2 (en) | 2004-07-30 | 2019-04-09 | Avent, Inc. | Antimicrobial devices and compositions |
WO2006116670A2 (en) | 2005-04-28 | 2006-11-02 | Zih Corp. | Antimicrobial coating for identification devices |
US9247736B2 (en) | 2005-12-14 | 2016-02-02 | 3M Innovative Properties Company | Antimicrobial adhesive films |
US20070141125A1 (en) | 2005-12-16 | 2007-06-21 | Bourdelais Robert P | Thermal image with antimicrobial property |
FR2912417A1 (en) | 2007-02-08 | 2008-08-15 | Hexis Sa | METHOD FOR ANTIMICROBIAL PROTECTION OF A SURFACE OF AN OBJECT USING AN ANTIMICORBIAL ADHESIVE PLASTIC FILM |
US20080242794A1 (en) | 2007-03-30 | 2008-10-02 | Sandford David W | Color stabilized antimicrobial polymer composites |
WO2009036310A1 (en) | 2007-09-12 | 2009-03-19 | Shawmut Corporation | Polyurethane upholstery |
WO2009140267A1 (en) | 2008-05-13 | 2009-11-19 | Precision Dynamics Corporation | Printable form having durable resistant wristband and labels |
US8343437B2 (en) | 2008-06-04 | 2013-01-01 | Jp Laboratories, Inc. | Monitoring system based on etching of metals |
KR20110106269A (en) | 2008-08-07 | 2011-09-28 | 마디코, 인크. | Method of manufacturing antimicrobial coating |
JP5471210B2 (en) | 2008-09-16 | 2014-04-16 | 株式会社リコー | Thermosensitive recording medium having antibacterial properties |
JP5782736B2 (en) | 2010-03-16 | 2015-09-24 | 株式会社リコー | Thermal recording medium |
-
2012
- 2012-10-23 US US13/658,197 patent/US8840978B2/en active Active
- 2012-10-24 WO PCT/US2012/061566 patent/WO2013063026A1/en active Application Filing
- 2012-10-24 PL PL12844060T patent/PL2771875T3/en unknown
- 2012-10-24 ES ES12844060.9T patent/ES2662037T3/en active Active
- 2012-10-24 AU AU2012329005A patent/AU2012329005B2/en active Active
- 2012-10-24 CA CA2853096A patent/CA2853096C/en active Active
- 2012-10-24 EP EP12844060.9A patent/EP2771875B1/en active Active
-
2014
- 2014-01-28 US US14/165,918 patent/US20140141182A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6361839B1 (en) * | 1995-07-31 | 2002-03-26 | National Ink Incorporated | Hot stamping foil and process |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107225883A (en) * | 2017-06-22 | 2017-10-03 | 河南卓立膜材料股份有限公司 | One kind decoration antibacterial type heat transfer film and preparation method thereof |
Also Published As
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PL2771875T3 (en) | 2018-07-31 |
EP2771875A1 (en) | 2014-09-03 |
US8840978B2 (en) | 2014-09-23 |
CA2853096C (en) | 2016-08-16 |
CA2853096A1 (en) | 2013-05-02 |
EP2771875B1 (en) | 2018-01-17 |
EP2771875A4 (en) | 2015-12-09 |
AU2012329005A1 (en) | 2014-05-15 |
ES2662037T3 (en) | 2018-04-05 |
WO2013063026A1 (en) | 2013-05-02 |
AU2012329005A2 (en) | 2014-07-10 |
US20130101758A1 (en) | 2013-04-25 |
AU2012329005B2 (en) | 2014-09-25 |
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