Abstract:
L'invention à trait à un procédé pour réaliser un revêtement par un matériau (9) d'au moins une partie de la surface d'un substrat (6) par projection de particules dudit matériau (9) vers le substrat (6) à revêtir au moyen d'un fluide vecteur (8) contenant un composé choisi parmi les gaz de l'air. Selon l'invention, ledit fluide vecteur (8) est à l'état liquide, à une pression d'au moins 300 bar et à une température inférieure à 0°C. Installation de traitement de surface associée, notamment une installation pour opérer un procédé selon l'invention.
Abstract:
A method for depositing a coating comprising a polymer and impermeable dispersed solid on a substrate, comprising the following steps: discharging at least one impermeable dispersed solid in dry powder form through a first orifice; discharging at least one polymer in dry powder form through a second orifice; depositing the polymer and/or impermeable dispersed solid particles onto said substrate, wherein an electrical potential is maintained between the substrate and the impermeable dispersed solid and/or polymer particles, thereby forming said coating; and sintering said coating under conditions that do not disrupt the activity and/or function of the substrate. A similar method is provided for depositing a coating comprising a hydrophobic polymer and a water-vapor-trapping material on a substrate.
Abstract:
A method and apparatus for applying a coating or paint such as a low-solids adhesion promoter onto a substrate such as a plastic part using an electrostatic process and a supercritical fluid such as CO2 is disclosed. Also disclosed is a spray gun that is desinged to have minimized coating leakages for use in connection with such a method. In one embodiment of the present invention, a paint spraying gun includes a gasket that seals the constituent parts of the gun that form a fluid flow path defined therein so that substantially no combustion or atomization of the fluid flowing therethrough occurs prior to exit from the guns spray tip. In this embodiment, the gun housing is designed to substantially reduce leaking of paint composition into the gun. It should be understood that the abstract of the disclosure is not intended to be and should not be found to be limiting to the scope of the claims contained in this application or in any patent issuing therefrom.
Abstract:
The invention is directed to a method and apparatus for coating substrates by a liquid spray so as to avoid entrapment of gaseous bubbles, particularly air bubbles, in the coating and desirably to thereby obtain bubble-free coatings. More particularly, the invention involves spray applying the coating to a substrate in an atmosphere consisting of gases having appreciable solubility in the applied coating, such as carbon dioxide, such that gas bubbles that may become entrapped in the coating are removed after application by the gases dissolving into the coating and diffusing to the surface.
Abstract:
Processes are disclosed for reducing the viscosity of compositions containing one or more polymeric compounds so as to make them transportable by adding a subcritical compressed fluid, which fluid is a gas at standard conditions of 0 °C and one atmosphere pressure.
Abstract:
Disclosed are precursor coating compositions which are particularly suitable for being admixed with at least one supercritical fluid used as a viscosity reduction diluent and then spraying this resultant liquid mixture of supercritical fluid and precursor coating composition onto a substrate to be coated.
Abstract:
Hair accessories include (a) a substrate having a hair-holding surface configured for holding hair, and a structural surface; and (b) a layer provided on at least a portion of the hair-holding surface, wherein the layer contains a plurality of flocked fibers. Methods of manufacturing hair accessories are described.
Abstract:
A method of forming a color filter is provided. The method includes providing a mixture of a color filter material and a compressed fluid; providing at least a partially controlled environment for retaining a substrate, the at least partially controlled environment being in fluid communication with the mixture of the color filter material and the compressed fluid; providing a shadow mask in close proximity to the substrate retained in the at least partially controlled environment; and chargably releasing the mixture of the color filter material and the compressed fluid into the at least partially controlled environment, wherein the color filter material becomes free of the compressed fluid prior to contacting the substrate at locations defined by the shadow mask thereby forming a patterned deposition on the substrate.
Abstract:
The present invention is related to the modifying of substrates with multiple modifying agents in a single continuous system. At least two processing chambers are configured for modifying the substrate in a continuous feed system. The processing chambers can be substantially isolated from one another by interstitial seals. Additionally, the two processing chambers can be substantially isolated from the surrounding atmosphere by end seals. Optionally, expansion chambers can be used to separate the seals from the processing chambers.
Abstract:
The invention is related to a coating delivery system that includes at least one pressure vessel having an inner surface, a flexible bladder disposed in a first pressure vessel and having an open condition and a closed condition, an internal region disposed between the inner surface and the bladder, and a deliverable substance including a coating component interspersed with at least one of liquefied carbon dioxide and supercritical carbon dioxide. The deliverable substance is disposed in one of the flexible bladder and the internal region, and the pressure-conveying fluid is received in the other to exert pressure on the deliverable substance and thereby permit transport thereof when the flexible bladder is in the open condition.