US20060210700A1 - Flexible and plastic radiopaque laminate composition - Google Patents

Flexible and plastic radiopaque laminate composition Download PDF

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Publication number
US20060210700A1
US20060210700A1 US11083842 US8384205A US2006210700A1 US 20060210700 A1 US20060210700 A1 US 20060210700A1 US 11083842 US11083842 US 11083842 US 8384205 A US8384205 A US 8384205A US 2006210700 A1 US2006210700 A1 US 2006210700A1
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radiopaque
material
plastic
laminate
composition
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Abandoned
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US11083842
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Thomas Lachner
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Merit Medical Systems Inc
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Lachner Thomas F
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L29/00Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/04Macromolecular materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L29/00Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/14Materials characterised by their function or physical properties, e.g. lubricating compositions
    • A61L29/18Materials at least partially X-ray or laser opaque
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/13Hollow or container type article [e.g., tube, vase, etc.]
    • YGENERAL 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
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    • Y10T428/1352Polymer or resin containing [i.e., natural or synthetic]
    • YGENERAL 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
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    • Y10T428/1352Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393Multilayer [continuous layer]
    • YGENERAL 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
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    • Y10T428/13Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1397Single layer [continuous layer]
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322Composite web or sheet
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/256Heavy metal or aluminum or compound thereof
    • YGENERAL 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
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    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/30Self-sustaining carbon mass or layer with impregnant or other layer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • YGENERAL 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
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    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31551Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • YGENERAL 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
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    • Y10T428/31652Of asbestos
    • Y10T428/31663As siloxane, silicone or silane
    • YGENERAL 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
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    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/31786Of polyester [e.g., alkyd, etc.]
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
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    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31855Of addition polymer from unsaturated monomers
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31855Of addition polymer from unsaturated monomers
    • Y10T428/31935Ester, halide or nitrile of addition polymer

Abstract

A flexible laminate composition and methods for manufacturing same are provided. The flexible laminate composition includes one or more discrete and separate layers of a radiopaque material wherein the radiopaque layer is applied via a solvent to a layer that is composed of a plastic material. The laminate composition can be formed into a radiopaque marker band that can be used with a medical device, such as a catheter, for radiographic imaging. The laminate composition as an alternative can also be utilized to form the catheter or other suitable medical device.

Description

    BACKGROUND OF THE INVENTION
  • [0001]
    The present invention relates to laminate compositions. More specifically, the present invention relates to flexible and plastic laminate compositions that include a discrete and separate layer of a radiopaque material.
  • [0002]
    The use and manufacture of radiopaque materials compounded into plastic resins and then extruded into tubing or molded into shapes is well known. Radiopaque qualities are imparted to plastics through the dispersion of radiopaque materials into the thermoplastic resin. The resin is then extruded into tubes or molded into shapes that are desirable for use. In order for these resins to be radiopaque, the resins must be loaded with high percentages of radiopaque materials. This high percentage of loading can create structural and functional problems with the materials.
  • [0003]
    The use of a thin metal layer that can impart radiopaque qualities is also known. For example, ion implantation and vapor deposition processes can be utilized to deposit a thin layer of metal on the surface of medical devices. Electro-deposition processing techniques are also known that can apply a metal layer to the surface of medical devices. These types of processes are effective at producing a thin layer of radiopaque metal on the surface of the plastic. As a result, a high level of radiopacity for a given amount of material is expected. These types of processes are, however, costly and of limited use in the mass production of plastic medical devices.
  • SUMMARY OF THE INVENTION
  • [0004]
    The present invention relates to a flexible plastic laminate composition with radiopaque properties. The laminate composition includes a single or multiple layers of a plastic material and a single or multiple layers of radiopaque or conductive materials wherein the radiopaque or conductive material forms a discreet and separate layer applied via a solvent between the layers of a plastic material. The use of a solvent allows the radiopaque material to be adhered to a surface of the plastic material upon evaporation of the solvent. This results in the formation of a uniform and thin layer of radiopaque material within the laminate composition such that desired radiopaque properties can be achieved.
  • [0005]
    The laminate composition can be formed into various geometries, such as tubular parts that can be cut to desired lengths to form compliant radiopaque marker bands. The radiopaque marker bands are flexible and made, in part, from a plastic material. This allows the marker bands to be readily applied to medical devices, such as catheters, for radiographic imaging. Alternatively, the laminate compositions can be utilized to form the catheter or other suitable medical device.
  • [0006]
    In an embodiment, the present invention provides a flexible laminate composition that includes one or more discrete and separate layers of a radiopaque material. The composition includes one or more plastic layers composed of a plastic material and one or more radiopaque layers composed of a radiopaque material wherein at least one of the radiopaque layers is applied via a solvent to at least one of the plastic layers.
  • [0007]
    In another embodiment, the present invention provides a method of manufacturing a flexible laminate composition. The method includes forming a radiopaque solution including a radiopaque material; and applying the radiopaque material via a solvent to a plastic layer composed of a plastic material; and forming a uniform layer of the radiopaque material on the plastic material. As a result, a uniform and thin layer of the radiopaque material can be readily formed such that a desired level of radiopaque properties associated with the laminate can be achieved.
  • [0008]
    Additional features and advantages of the present invention are described in, and will be apparent from, the following Detailed Description of the Invention and the figures.
  • BRIEF DESCRIPTION OF THE FIGURES
  • [0009]
    FIG. 1 illustrates a laminate composition pursuant to an embodiment of the present invention.
  • [0010]
    FIG. 2 illustrates a radiopaque marker band pursuant to an embodiment of the present invention.
  • [0011]
    FIG. 3 illustrates a catheter with a radiopaque marker band pursuant to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0012]
    The present invention relates to laminate compositions. More specifically, the present invention relates to flexible and plastic laminate compositions that include a discrete and separate layer of a radiopaque material.
  • [0013]
    The laminate composition of the present invention includes a single or multiple layers of a plastic material and a single or multiple layers of radiopaque or conductive materials wherein the radiopaque or conductive material forms a discreet and separate layer applied via a solvent between the layers of plastic material. As a result, the laminate composition includes a uniform and thin layer of radiopaque material such that a desired and suitable level of radiopaque qualities can be achieved.
  • [0014]
    The laminate composition can be formed into various geometries, such as tubular parts that can be cut to desired lengths to form compliant radiopaque marker bands. The radiopaque marker bands are flexible and made, in part, from a plastic material. This allows the marker bands to be readily applied to medical devices, such as catheters, for radiographic imaging. Alternatively, the laminate compositions can be utilized to form the catheter or other suitable medical device.
  • [0015]
    The laminate composition can include any suitable type and amount of materials. As previously discussed, the laminate composition includes layers of radiopaque and plastic materials wherein the radiopaque material layers are applied via a solvent to the plastic material layers. The radiopaque material includes bismuth oxychloride, bismuth subcarbonate, bismuth trioxide, barium sulfate, tungsten, tantlium, platinum, silver, gold, copper, carbon, the like and combinations thereof.
  • [0016]
    The radiopaque material can include any suitable particle size such that it can be applied to the plastic material by adhering thereto with the use of a solvent, such as methyl ethyl ketone, tetrahydroform, dimethyl formamide, toluene, acetone, heptane, cyclohexane, the like and combinations thereof. Preferably, the radiopaque material has a particle size that ranges from about 2 microns to about 120 mesh screen size. In an embodiment, the radiopaque material is a perforated metal foil.
  • [0017]
    The plastic material can include any suitable type and amount of plastic material. In an embodiment, the plastic material includes a solution grade plastic coating resin, such as polyurethane, polyester, polyether, polycaprolactone, a copolymer of vinyl chloride and vinyl acetate, polyvinyl chloride, a silicone elastomer, the like and combinations thereof.
  • [0018]
    The plastic material can be made in any suitable manner. For example, the plastic material can be made from a solution grade plastic in a solvent that allows for the formation of different shapes. This can be conducted with the use of mandrels, forms or the like that are coated with the plastic solution. The solvent for the solution grade plastic can include, for example, methyl ethyl ketone, tetrahydrofuran, dimethylformamide, toluene, acetone, heptane, cyclohexane, the like, and combinations thereof.
  • [0019]
    As the solvent evaporates, the plastic is reconstituted on the form. When the form is removed, the plastic retains it shape and has the strength of the original material. The form can include any suitable type of shapes and sizes, such as a tubular part with a lubricous surface.
  • [0020]
    The radiopaque material is adhered through the application of an additional solvent or solvents to the surface of the formed plastic. The solvent or solvents create a tacky surface and thus cause the surface to flow and allow the adhesion and encapsulation of the radiopaque material. Once the solvent evaporates, the radiopaque material is retained on the surface of the plastic material thereby forming a uniform and thin layer of the radiopaque material.
  • [0021]
    Multiple applications of the plastic coating, solvent and radiopaque material result in a laminated plastic structure where the radiopaque material is not dispersed into the plastic. Instead, the radiopaque material is deposited as a uniform and thin layer lamination. The uniform thin layer of radiopaque material can enhance the ability of the laminate composition to block x-ray radiation as compared to conventional radiopaque materials, such as an aggregate of dispersed radiopaque materials in a molded or an extruded part. The use of the solvent allows the uniform thin layer of radiopaque material to be formed within the laminate composition with relative ease in operation, thus facilitating the manufacture of the radiopaque laminate in mass production.
  • [0022]
    FIGS. 1-3 provide graphical representations that illustrate various embodiments of the present invention. FIG. 1 illustrates a sectional view of a laminate composition 10 according to an embodiment. As shown, a radiopaque material 12 is applied between a first plastic layer 14 and a second plastic layer 16. As previously discussed, the radiopaque material is applied to the plastic layers with the use of a solvent. The solvent produces a tacky surface such that the radiopaque material can effectively adhere upon evaporation of the solvent. This results in a uniform thin layer of radiopaque material within the laminate composition. The laminate composition can include multiple layers of plastic material and radiopaque material depending on the type of application.
  • [0023]
    As previously discussed, the laminate compositions of the present invention can be formed into any suitable types of configurations. As shown in FIG. 2, the laminate composition 10 is formed into a radiopaque marker band 18. The marker band 18 can be applied to a catheter 20 via RF bonding 22, heat bonding, or other suitable technique to a part 24 of the catheter 20 as shown in FIG. 3. Alternatively, the laminate composition can be formed into the catheter or other suitable type of medical device in any suitable manner.
  • [0024]
    It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present invention and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.

Claims (20)

  1. 1. A flexible laminate composition including one or more discrete and separate layers of a radiopaque material, the composition comprising one or more plastic layers composed of a plastic material and one or more radiopaque layers composed of a radiopaque material wherein at least one of the radiopaque layers is applied via a solvent to at least one of the plastic layers.
  2. 2. The flexible laminate composition of claim 1, wherein the composition is formed into a medical device.
  3. 3. The flexible laminate composition of claim 2, wherein the medical device is a catheter.
  4. 4. The flexible laminate composition of claim 1, wherein the composition is formed into a radiopaque marker band.
  5. 5. The flexible laminate composition of claim 4, wherein the radiopaque marker band can be RF or heat bonded to a medical device.
  6. 6. The flexible laminate composition of claim 1, wherein the radiopaque material is selected from the group consisting of bismuth oxychloride, bismuth subcarbonate, bismuth trioxide, barium sulfate, tungsten, tantlium, platinum, silver, gold, copper, carbon and combinations thereof.
  7. 7. The flexible laminate composition of claim 6, wherein the radiopaque material has a particle size ranging from about 2 microns to about 120 mesh screen size.
  8. 8. The flexible laminate composition of claim 6, wherein the radiopaque material is a perforated metal foil.
  9. 9. The flexible laminate composition of claim 1, wherein the plastic material includes a solution grade plastic coating resin.
  10. 10. The flexible laminate composition of claim 9, wherein the plastic material is selected from the group consisting of polyurethane, polyester, polyether, polycaprolactone, and mixtures thereof.
  11. 11. The flexible laminate composition of claim 9, wherein the plastic material is selected from the group consisting of a copolymer of vinyl chloride and vinyl acetate, polyvinyl chloride and mixtures thereof.
  12. 12. The flexible laminate composition of claim 9, wherein the plastic material is composed of a silicone elastomer.
  13. 13. A method of manufacturing a flexible laminate composition, the method comprising:
    applying a radiopaque material via a solvent to a plastic layer composed of a plastic material; and
    forming a uniform layer of the radiopaque material on the plastic layer.
  14. 14. The method of claim 13, wherein the solvent is selected from the group consisting of methyl ethyl ketone, tetrahydrofuran, dimethylformamide, toluene, acetone, heptane, cyclohexane, and combinations thereof.
  15. 15. The method of claim 13, wherein the radiopaque material has a particle size that ranges from about 2 microns to about 120 mesh screen size.
  16. 16. The method of claim 13, wherein the radiopaque material is a perforated metal foil.
  17. 17. The method of claim 13, wherein the flexible laminate composition is formed into a medical device including a catheter.
  18. 18. The method of claim 13, wherein the flexible laminate composition is formed into a radiopaque marker band that can be applied to a medical device.
  19. 19. The method of claim 13, wherein the radiopaque material is selected from the group consisting of bismuth oxychloride, bismuth subcarbonate, bismuth trioxide, barium sulfate, tungsten, tantlium, platinum, silver, gold, copper, carbon and mixtures thereof.
  20. 20. The method of claim 13, wherein the plastic material includes a solution grade plastic coating resin selected from the group consisting of polyurethane, polyester, polyether, polycaprolactone, vinyl chloride, vinyl acetate, polyvinyl chloride, silicone elastomer, and combinations thereof.
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Cited By (4)

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US20090281558A1 (en) * 2008-05-09 2009-11-12 Boston Scientific Scimed, Inc. Surgical meshes with radiopaque coatings
US20090281635A1 (en) * 2008-05-09 2009-11-12 Boston Scientific Scimed, Inc. Antimicrobial medical devices
US20090318895A1 (en) * 2005-03-18 2009-12-24 Merit Medical Systems, Inc. Flexible and plastic radiopaque laminate composition
WO2009158060A1 (en) * 2008-06-27 2009-12-30 Merit Medical Systems, Inc. Catheter with a radiopaque marker

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WO2013036643A3 (en) 2011-09-06 2013-07-11 Hemosphere, Inc. Vascular access system with connector
CN104582783B (en) * 2012-08-15 2017-11-10 德尼培股份有限公司 Multilayer Pipe

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