WO1998008614A1 - Application de polymere au moyen de gaz chauds - Google Patents

Application de polymere au moyen de gaz chauds Download PDF

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Publication number
WO1998008614A1
WO1998008614A1 PCT/US1997/015193 US9715193W WO9808614A1 WO 1998008614 A1 WO1998008614 A1 WO 1998008614A1 US 9715193 W US9715193 W US 9715193W WO 9808614 A1 WO9808614 A1 WO 9808614A1
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WO
WIPO (PCT)
Prior art keywords
substrate
gas
coating
powdered
nozzle
Prior art date
Application number
PCT/US1997/015193
Other languages
English (en)
Other versions
WO1998008614A9 (fr
Inventor
Thomas F. Bernecki
Daniel R. Marron
George Nichols
Sergio Gazzea
Silvestro Farronato
Farug Marikar
Original Assignee
Bernecki Thomas F
Marron Daniel R
George Nichols
Sergio Gazzea
Silvestro Farronato
Farug Marikar
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bernecki Thomas F, Marron Daniel R, George Nichols, Sergio Gazzea, Silvestro Farronato, Farug Marikar filed Critical Bernecki Thomas F
Priority to AU42399/97A priority Critical patent/AU4239997A/en
Publication of WO1998008614A1 publication Critical patent/WO1998008614A1/fr
Publication of WO1998008614A9 publication Critical patent/WO1998008614A9/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/08—Flame spraying
    • B05D1/10—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
    • B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
    • B05B7/162—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
    • B05B7/1626—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/001—General methods for coating; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins

Definitions

  • This invention relates to an improved method for coating substrates, and, more particularly, a method for coating a substrate by means of a two-step process involving; first, entraining thermoplastic or thermoset plastic powder in a non-combusting, gas stream while heating the powder and directing the liquified powder onto the substrate; and, second, subsequently cooling, setting or solidifying of the liquified powder material applied to the substrate. Additional curing or processing of the coating may be effected in situ. Additionally, apparatus for effecting liquification, application and solidification of the plastic powder is disclosed.
  • the volatile organic compound content of paint formulations is increasingly the subject of various federal and state regulations in the United States and throughout the world, which limit or preclude the use of formulations containing such compounds.
  • Such regulations now exist because dispersal or evaporation of volatile organic compounds into the atmosphere has been identified as one potential cause of air pollution and degradation of the atmosphere.
  • One solution to this problem has been to eliminate or significantly lower the quantitative amount of volatile organic compounds in such formulations. Utilization of water based paints and coatings is another solution to this problem.
  • a disadvantage associated with low volatile organic compound materials as well as water based materials is their poor or limited performance as a coating material on substrates.
  • alternative coating techniques such as electrostatic deposition processes require significant capital expenditures and potentially hazardous application processes as well as curing processes in ovens.
  • the size of items which may be coated utilizing such technology is limited.
  • Another drawback is that such techniques are not field portable.
  • the present invention comprises a method for applying powdered plastic to a substrate and apparatus for performing the method of applying various powdered plastic materials to a substrate as a coating.
  • the method includes injecting plastic powder material into a non-combusting, gas stream and heating the powder to thereby simultaneously melt and forcefully direct the liquified plastic powder droplets onto a substrate where it adheres.
  • a solidification mechanism such as cooling then takes place, and a further curing mechanism such as heating, exposure to ultraviolet light or other curing means may then occur.
  • heated gases or other heating means the coating materials can be entrained and applied in an appropriate manner, set and then cured, if necessary, after application.
  • the methodology as well as the apparatus are useful in the application of coatings onto a variety of substrates, including wood, metal, plastic, paper, concrete and other materials.
  • Yet another object of the invention is to provide an apparatus for ejecting plastic powder material onto a substrate while simultaneously heating the plastic powder material sufficiently so that it will melt or fluidize and adhere to the substrate as a coating.
  • Yet a further object of the invention is to provide a field portable means for applying plastic materials as a coating onto substrates or articles that cannot be easily brought into a shop for coating.
  • Another object and advantage of the invention is associated with circumstances where open flames pose a hazard, such as when coating the surface of pipelines in which volatile materials are transported.
  • the ability to coat such pipelines or repair corrosion protective coatings without exposing the coating to an open flame or interrupting pipeline service is thus an object and advantage of the invention.
  • the method and apparatus of the invention may be used in a household environment as a replacement for painting because the coatings may be applied without the hazard of open flames.
  • Another object of the method and apparatus of the invention is to provide the ability to apply a plastic coating in conjunction with elements such as decorative additives, biocides, pigments, insecticides, etc., utilizing a process wherein the temperature of the application process will not affect the desired properties of such additives.
  • Another object is to provide a coating method and apparatus having reduced transportation costs, since unlike paints, water and/or solvents are not necessary, thus the weight and bulk associated with such liquid coatings is significantly reduced.
  • a further object of the invention is to eliminate direct exposure of the plastic powder or substrate to combustion or flame as part of the coating process and to enable simultaneous coating of multiple surfaces comprised of different materials.
  • Another object of the invention is to provide a methodology by which a substrate or object can be coated in a continuous manner. That is, with the subject matter of the invention, a coating hood or enclosure can be provided wherein the object to be coated is maintained within a heated region where the ambient temperature in the region is sufficient to melt or liquify the powder as it is ejected into a non-combusting gas stream and directed onto an object passing through the region or maintained in the region. Thereafter, the object may be transported or passed into a second hood, furnace or region for cooling, setting or, if necessary, curing.
  • Another object of the invention is to provide a method and apparatus whereby powdered plastic material may be applied to a substrate having a three-dimensional configuration or shape and wherein the application method comprises utilization of a heating mechanism such as a resistive wire that conforms to the general shape of the substrate. Gases passed through or over the resistive elements are appropriately heated and powder material is selectively liquified and propelled to form a uniform coating on an item.
  • FIGURE 1 is a schematic view of the construction and method of operation of the apparatus of the present invention.
  • FIGURE 2 is a schematic view depicting an experimental arrangement for controlled practice o f the invention
  • FIGURE 3 is a schematic view depicting a further test setup to practice the invention
  • FIGURE 4 is a schematic view of an alternative apparatus to practice the invention.
  • FIGURE 5 is another schematic view depicting apparatus to practice the invention; and
  • FIGURE 6 is a schematic cross-sectional view of a Coanda effect nozzle applicator used in the practice of the invention.
  • the present invention includes a process for coating plastic material onto a substrate by way of introducing the powdered material into a stream of non-combusting gas, entraining the powdered material in the gas stream, the gas stream and material being heated to liquefy the powdered material, followed by directing the entrained liquefied, powdered material onto the substrate by directing the gas stream toward the substrate, coating the substrate with the material, and setting the material on the substrate as a solid phase adhered to the substrate.
  • the powdered material in general is a cross-linkable polymeric system having a melting point of less than about 150 C in its uncured state and is typically a polyester polymer, an epoxy polymer, a polyurethane polymer, an acrylic polymer or mixtures thereof.
  • the step of setting the material includes crosslinking the polymeric system substantially contemporaneously with the step of coating the substrate.
  • the subject matter of the invention utilizes characteristics of thermoplastic and thermoset plastic powders that melt at temperatures significantly less than their decomposition temperatures, for example, yet which, for certain thermoset materials, when properly applied to a surface or substrate, can, in some cases, survive temperatures up to 400°C.
  • Existing technologies utilize combustion or flame techniques to apply such coatings.
  • Glass and DePay in the Fourth National Thermal Spray Conference Proceedings Report, at pages 345- 351, entitled “Protective Thermoplastic Powder Coating Specifically Designed Adhesive Polymer” disclose devices and methods for application of plastic in powder form to a substrate using a flame spray gun.
  • the method and apparatus of the present invention provides a different, but straightforward, distinct and safe method for application of such materials as a coating onto a substrate. That is, air and other gases may be heated by a variety of methodologies including precombustion or electrical resistance heating. The plastic powder is then entrained in the heated gas, liquified and applied to the substrate by directing the gas flow and entrained particles at the substrate. Alternatively, heat can be transferred by convective, conductive or radiant means to gas entrained powder to liquify the powder. The gas stream is then directed at the substrate being coated.
  • thermoset powders of a desired particle size may be injected into a gas stream and heated so that the powder becomes melted and remains substantially liquid until it reaches a substrate surface upon which it is to be placed as a coating.
  • the initial melting temperature of the plastic powder is dependent upon the material and can be determined by thermochemical or other methods.
  • the appropriate increase in gas temperature above the melting point of the plastic powder injected in the gas is therefore determined by factors such as the thermal mass, i.e. size and volume of the particle, the rate of heat transfer to the particle, which is dependent at least in part on the gas involved, the residence time of the particle in the heat transfer area, and the composition of the powder.
  • the method of the invention works with thermoset materials which, after liquifying and applying, cool and set, and may, if necessary, be cured by a variety of methods including infrared, ultraviolet, microwave or controlled heating methods.
  • the method of the invention also applies to thermoplastic materials which are entrained and heated to a molten state and applied onto a surface. They then cool or are exposed to a second or controlled cooling stage where they harden on the substrate.
  • the method and apparatus of the invention contemplate a first step of entraining and liquifying powdered plastic material followed by a second step (upon application of the liquified material to a substrate) of converting the material to a solid phase.
  • Such thermally processed powder materials require spraying at or above their melting points, yet it is appropriate to avoid exposure to temperatures significantly above the melting point.
  • a reheating step may be utilized followed by a resetting and, if necessary, further curing step.
  • the separate or additional curing step implies change in the physical character of the coating in the solid phase due to heat, radiation, chemical action or other means.
  • FIGURE 1 therefore discloses, in schematic form, one embodiment of the invention.
  • a hot air blower or gun 10 includes an electric coil 12, to heat air flowing through the gun 10.
  • a motor 14 operates a fan or propeller 16 to move the air through the gun 10.
  • An adjustable power supply 18 controls the energy to the coil 12 and thus controls the heat input to the air flowing through the hot air gun 10.
  • the hot air gun 10 may, for example, be in the form of a hair dryer or hot air paint removal gun, appropriately modified to practice the invention.
  • the motor 14 operates to move or effect discharge of heated air from the front or outlet 20 of the gun 10.
  • a fitting or discharge nozzle 22 having a passage 24 with an inlet 26 and an outlet 28.
  • hot air discharging from gun 10 will flow into nozzle 22 via inlet 26 through passage 24 and out of the outlet 28.
  • Liquified or melted particles of plastic powder 34 entrained in the heated air flow will simultaneously be discharged from nozzle 22.
  • the nozzle 22 thus is attached to a mechanism which feeds plastic powder 34 in the solid phase into the passage 24 at or near inlet 26 to be liquified or changed to the liquid state.
  • the plastic material or powder 34 is maintained in a storage bin 30 and is fed from that bin 30 through a hose or discharge line 32 by means of a feeder, such as a screw feed mechanism or other transport mechanism.
  • the hose 32 directs the powder 34 into or near the inlet 26 of the nozzle or fitting 22.
  • the inlet 26 is positioned so that the powder 34 is injected into passage 22 in a manner which permits optimal residence time for melting or liquification.
  • the heated, noncombusting gas which is typically air, thus entrains plastic powder 34.
  • the powdered plastic material 34 is heated and substantially melted, or liquified and directed onto a substrate 36 by the air flow from outlet 28 of nozzle 22. Upon engaging the substrate 36, the powder 34 will coat the substrate 36.
  • the gun 10 may be directed or moved over the surface of the substrate 36 to effect a coating over the total surface of the substrate 36 and into all of the depressions and projections of the substrate 36.
  • the powder 34 is thus applied as a coating 35 and must be post- processed or changed into the solid phase on the substrate 36.
  • the post-processing operation may, in the case of thermoplastics for example, be effected solely by cooling due to removal of the gun 10 or due to unheated air discharge from the gun 10.
  • an additional curing step may be effected by further heating associated with the air discharge from gun 10.
  • a valve in the powder hose 32 may be closed and cool air or hot air may thus be applied to the coated substrate 36 to effect curing my means of ambient or heated air application.
  • the powder 34 may be a blend of materials which, when liquified, will mix and form a composite coating.
  • Two guns may be used to simultaneously apply the liquified constituents of an epoxy with the mixing being effected as the materials are applied to the substrate 36.
  • the material that forms the coating is a plastic material taken from the group of plastics including the following thermoset and thermoplastic materials: acrylics, alkyds, allyl phthlates, epoxies, elamine, melamine/phenolics, phenolics, unsaturated polyesters, vinyl esters, polyimides, silicones, fluorosilicones, ureas, polyurethanes, ABS, ABS alloys, acetal, acrylic copolymers, acrylonitrile copolymers, cellulosics, fluoropolymers, ionomers, liquid crystal polymers, nylons, nylon alloys, polyamide-imide, polyarylate, polybutylene, polyarylsufone, polycarbonate, polycarbonate alloys, polyestercarbonate, thermoplastic polyesters (such as PET, PBT, PCT, PCTA, PCTG, and PETC), ethylene acrylic acid and copolymers, polyaryletherketone, polyetheretherketone, polyetherketone
  • a commercial 1500 watt hot-air gun 68 ( Figure 2), with variable power (rheostat controlled), was mounted in a fixture 70.
  • a 1/8" internal diameter copper tube 71 was mounted onto a ring stand 72.
  • One end 73 of the copper tube was attached to a commercially available powder feed device (not shown) commonly used in the thermal-spray industry.
  • the other end 74 of the tube was placed radially extending from the centerline 75 of the exhaust from the hot-air gun 68.
  • Powder 76 was injected from the copper tube 71 into the hot-air stream perpendicular to the axis 75 of gas exhaust.
  • the original point of injection of powder 76 was several inches from the face of the hot- air gun.
  • the injection points were varied, in a direction along the axis 75 toward and away from the face of the hot-air gun (as depicted in phantom by way of example), until the powder 68 melted upon being entrained. If the powder melted more than 2" from the face of the gun, the power to the gun was reduced. This was done to minimize fixturing. Next it was necessary to find, an optimun angle of injection of the powder.
  • air which is a non-combustible gas is preferable as a carrier and heating medium, but other gases may be utilized, including high heat capacity gases such as hydrocarbons like methane, ethane, propane; halocarbons such as methyl chloride; freons, water vapor and carbon dioxide; inert gases such as nitrogen argon and helium; and reactive gases such as ammonia, silane, and water vapor; basic gases and acidic gases.
  • gases such as hydrocarbons like methane, ethane, propane; halocarbons such as methyl chloride; freons, water vapor and carbon dioxide; inert gases such as nitrogen argon and helium; and reactive gases such as ammonia, silane, and water vapor; basic gases and acidic gases.
  • the temperature of the air discharged from the gun 10 is typically greater than 100°C and in the range, of 100°C to 500°C, although variations in the temperature may be needed and may be effected by variations in the motor speed, fan blade size, power to the coil and the size of the coil and many other factors.
  • the rate of powder 34, 76 feed through the line 32, 71 may be varied.
  • the size and configuration of the nozzle 22 may be varied.
  • the powder feed rate may be steady or variable based on power consumption and other parameters such as described.
  • the length of the passage through the nozzle 22, the size and shape of the inlet 26 and outlet 28 of the nozzle 22 may be varied.
  • the number and arrangement of powder hoses 32 may be varied. That is, hoses 32 may be arranged radially around the inlet 26 of the nozzle 22.
  • the material that is fed into the nozzle 22 may be mixed within the nozzle 22 during the heating operation. That is, more than one powder hose 32 may be provided to provide a mix of powders utilized for coating the substrate.
  • the substrate may be preheated by application of heated, non-combusting gas.
  • an electrical heating element is powered by an alternating current (ac) power supply, typically 120V ac.
  • ac alternating current
  • a fan forces ambient air through the heating elements to heat the air and then propel the heated air from the nozzle.
  • the heating element need not be powered by ac. Direct current power is easily available from batteries, generators, fuel cells or even automotive cigarette lighter sockets.
  • a fan is not necessary since the gas to be heated can be supplied from pressurized systems (i.e. compressed gas cylinders).
  • the shaft for the fan can be made hollow, allowing axial feed of the powder, thereby requiring less energy to be consumed in the process.
  • a powder port 80 is in line with an axial ring of ceramic material 82.
  • a heating element 84 is wound on ceramic 82 and powder flows through a hollow shaft 86.
  • a gas is flowed through the heating elements by a fan 88, or from a separate gas source 87 ( Figure 5).
  • the powder is then melted at point 90 and transported to a substrate.
  • a ceramic 82 is used to provide both electrical isolation and a thermal barrier to prevent the polymer powder from melting until point 90.
  • a nozzle can be added to allow for modified heating of the powder.
  • a two-piece nozzle 92 and 94 would allow modification of nozzle length. Perforations of nozzle piece 92 would allow modification of the time at temperature of the powders.
  • An additional device utilizes a Coanda effect nozzle 50.
  • Hot gas is directed through a circumferential passage 52 surrounding the nozzle interior. This gas stream is then fed through a ring nozzle 54 and follows the Coanda profile wall 56 to a nozzle outlet 58.
  • Powdered coating material is drawn through inlet 60, suspended in a cool or heated gas, by the low pressure at the center of the nozzle 50 induced by the Coanda effect. The heated powder and gases then exit the nozzle 50 through outlet 58 directed at the article or substrate to be coated.
  • This design is particularly resistant to powder accumulation on the interior of the nozzle 50 because of the continuous gas flow attached to the inner wall 56 by the Coanda effect even though the relative pressure at the inner wall 56 is less than that at the interior or center of the nozzle 50.
  • a variation of this device utilizes a modified nozzle 50 by addition of a radiant heating device 62 surrounding the inner wall 56 of the nozzle 50 to melt the powder.
  • Another variation would utilize multiple Coanda effect nozzles connected in series to achieve the desired residence time and heating of powder particles.
  • multiple nozzles would allow spraying multiple powders resulting in continuous or discretely graded coatings.
  • Such multiple nozzles could also be used to inject components into the coatings, which are non-reactive with the coating material.
  • Such other components or additives may include pigment, pestitcides, metal flakes, corrosion inhibitors, insecticides, solid lubricant, herbacides, fungicides, biocides, germacides, fluxes and other materials.
  • the hot gases can be by-products of a combustion process.
  • the powder injection system may be altered.
  • the apparatus may include a central throughbore or shaft associated with the fan motor as described above.
  • the plastic powder may then be introduced through the hollow shaft to the interior of the nozzle as described above.
  • the powder may be entrained in the air prior to heating of the air or gas.
  • coils may surround the gas entrained powder to thereby effect liquification or melting.
  • the heating coil may be positioned around or circumferentially surrounding the nozzle 22.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé et un appareil améliorés pour l'application d'un plastique en poudre (34) sur un substrat (36), ledit procédé consistant à chauffer un gaz non en combustion et à le décharger conjointement avec un plastique pulvérulent (34) dans une buse ou un raccord (22). Le plastique pulvérulent (34) est ainsi chauffé de sorte qu'il soit à l'état fluide et appliqué sur un substrat (36) par entraînement dans le courant de gaz. Le revêtement (35) est ensuite solidifié et, si nécessaire, durci de sorte que le substrat (36) soit enduit de manière appropriée.
PCT/US1997/015193 1996-08-30 1997-08-28 Application de polymere au moyen de gaz chauds WO1998008614A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU42399/97A AU4239997A (en) 1996-08-30 1997-08-28 Polymer coating by means of hot gases

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70489096A 1996-08-30 1996-08-30
US08/704,890 1996-08-30

Publications (2)

Publication Number Publication Date
WO1998008614A1 true WO1998008614A1 (fr) 1998-03-05
WO1998008614A9 WO1998008614A9 (fr) 1998-06-04

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PCT/US1997/015193 WO1998008614A1 (fr) 1996-08-30 1997-08-28 Application de polymere au moyen de gaz chauds

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WO (1) WO1998008614A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001085360A2 (fr) * 2000-05-11 2001-11-15 The Queen's University Of Belfast Procede de revetement
US6475316B1 (en) 2000-07-07 2002-11-05 3M Innovative Properties Company Methods of enhancing adhesion
WO2003051521A3 (fr) * 2001-12-14 2004-01-29 Du Pont Articles revetus par pulverisation au moyen d'un polymere non fusible
WO2004011531A1 (fr) * 2002-07-26 2004-02-05 H.B. Fuller Company Procedes polyvalents de preparation et d'utilisation de nouvelles particules composites dans des compositions de revetement en poudre
EP1406730A1 (fr) * 2001-06-18 2004-04-14 Northrop Grumman Corporation Ensemble d'injection reglable pour poudrage de poudre en fusion
DE102004042945A1 (de) * 2004-09-02 2006-03-30 Eads Deutschland Gmbh Heißgasspritzpistole, insbesondere zum thermischen Spritzen von Kunststoffen
DE102009032226A1 (de) 2008-07-28 2010-02-04 Heidelberger Druckmaschinen Ag Verfahren zur Erzeugung einer Partikel-Verteilung auf einem Bedruckstoff
WO2011141675A1 (fr) * 2010-05-11 2011-11-17 Lifcoat Technologies Ensemble pour la peinture de pièces
WO2014084994A1 (fr) 2012-11-28 2014-06-05 Baker Hughes Incorporated Procédé permettant de préparer un revêtement polymère haute température
WO2018024926A1 (fr) * 2016-08-02 2018-02-08 Jesus Hoyo Lopez Dispositif pour le séchage de peinture
WO2024050161A1 (fr) * 2022-09-02 2024-03-07 Ppg Industries Ohio, Inc. Procédés et appareil de pulvérisation thermique de revêtements

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US3958758A (en) * 1975-05-27 1976-05-25 Owens-Illinois, Inc. Spraying apparatus
US4049842A (en) * 1974-07-08 1977-09-20 Eppco Process for interior coating small mouth container open at one end
US4559239A (en) * 1982-02-01 1985-12-17 Cenegy Louis F Method for repairing cementitious substrate
JPH04326966A (ja) * 1991-04-26 1992-11-16 Kansai Paint Co Ltd 塗装仕上げ方法
US5285967A (en) * 1992-12-28 1994-02-15 The Weidman Company, Inc. High velocity thermal spray gun for spraying plastic coatings

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049842A (en) * 1974-07-08 1977-09-20 Eppco Process for interior coating small mouth container open at one end
US3958758A (en) * 1975-05-27 1976-05-25 Owens-Illinois, Inc. Spraying apparatus
US4559239A (en) * 1982-02-01 1985-12-17 Cenegy Louis F Method for repairing cementitious substrate
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US6475316B1 (en) 2000-07-07 2002-11-05 3M Innovative Properties Company Methods of enhancing adhesion
EP1406730A1 (fr) * 2001-06-18 2004-04-14 Northrop Grumman Corporation Ensemble d'injection reglable pour poudrage de poudre en fusion
EP1406730A4 (fr) * 2001-06-18 2006-08-23 Northrop Grumman Corp Ensemble d'injection reglable pour poudrage de poudre en fusion
WO2003051521A3 (fr) * 2001-12-14 2004-01-29 Du Pont Articles revetus par pulverisation au moyen d'un polymere non fusible
EP2267063A1 (fr) * 2002-07-26 2010-12-29 Valspar Sourcing, Inc. Procédés polyvalents de préparation et d'utilisation de nouvelles particules composites dans des compositions de revêtement en poudre
WO2004011531A1 (fr) * 2002-07-26 2004-02-05 H.B. Fuller Company Procedes polyvalents de preparation et d'utilisation de nouvelles particules composites dans des compositions de revetement en poudre
US7105201B2 (en) 2002-07-26 2006-09-12 H.B. Fuller Licensing & Financing, Inc. Versatile processes for preparing and using novel composite particles in powder coating compositions
US7622072B2 (en) 2002-07-26 2009-11-24 Valspar Sourcing, Inc. Versatile processes for preparing and using novel composite particles in powder coating compositions
DE102004042945A1 (de) * 2004-09-02 2006-03-30 Eads Deutschland Gmbh Heißgasspritzpistole, insbesondere zum thermischen Spritzen von Kunststoffen
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WO2011141675A1 (fr) * 2010-05-11 2011-11-17 Lifcoat Technologies Ensemble pour la peinture de pièces
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WO2014084994A1 (fr) 2012-11-28 2014-06-05 Baker Hughes Incorporated Procédé permettant de préparer un revêtement polymère haute température
US8962096B2 (en) 2012-11-28 2015-02-24 Baker Hughes Incorporated Method for preparing a high temperature polymer coating
CN104812941A (zh) * 2012-11-28 2015-07-29 贝克休斯公司 制备高温聚合物涂层的方法
AU2013353433B2 (en) * 2012-11-28 2016-11-10 Baker Hughes Incorporated Method for preparing a high temperature polymer coating
CN104812941B (zh) * 2012-11-28 2017-12-19 贝克休斯公司 制备高温聚合物涂层的方法
WO2018024926A1 (fr) * 2016-08-02 2018-02-08 Jesus Hoyo Lopez Dispositif pour le séchage de peinture
WO2024050161A1 (fr) * 2022-09-02 2024-03-07 Ppg Industries Ohio, Inc. Procédés et appareil de pulvérisation thermique de revêtements

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