Abstract:
Apparatus, system, and method of depositing thin and ultra-thin parylene are described. In an example, a core deposition chamber is used. The core deposition chamber includes a base and a rigid, removable cover configured to mate and seal with the base to create the core deposition chamber and to define an inside and an outside of the core deposition chamber. The core deposition chamber also includes a conduit through a top of the cover. The conduit has a lumen connecting the inside to the outside of the core deposition chamber. The lumen has a length and a cross-section. The cross-section has a width between 50 μm and 6000 μm. The length is less than 140 times the cross-section width. The core deposition chamber can be placed in an outer deposition chamber and can achieve parylene deposition less than 1 μm thick inside the core deposition chamber.
Abstract:
Polyparaxylyiene (PPX) polymers that can be expanded into porous articles that have a node and fibril microstructure are provided. The fibrils contain PPX polymer chains oriented with the fibril axis. The PPX polymer may contain one or more comonomer. PPX polymer articles may be formed by applying PPX to a substrate by vapor deposition. The nominal thickness of the PPX polymer film is less than about 50 microns. The PPX polymer film may be removed from the substrate to form a free-standing PPX polymer film, which may then be stretched into a porous article. Alternatively, a PPX polymer article can be formed by lubricating PPX polymer powder, heating the lubricated powder, and calendering or ram extruding to produce a preform that can subsequently be stretched into a porous article. The heating and expansion temperatures are from about 80°C to about 220°C or from about 220°C to about 290°C or from about 290°C to about 450°C.
Abstract:
Tubular medical articles have an interior surface and an exterior surface. At least a portion of the exterior surface of the tube is a printed surface, with a transparent vapor-deposited coating of a barrier polymer covering the exterior surface of the tube. The tube is a polymer composition containing one or more extractable components. The transparent vapor-deposited coating of a barrier polymer is derived from at least one ethylenically unsaturated monomer. The printed surface is visible through the barrier polymer layer. The vapor-deposited polymer coating barrier reduces the extraction of extractable component(s) from the tube as well as protecting the printed surface.
Abstract:
L'invention concerne une structure textile à base de fibres de verre, caractérisée par le fait qu'elle porte un revêtement de parylène (poly(para-xylylène)) ayant une épaisseur comprise entre 5 µm et 30 µm, de préférence entre 6 µm et 25 µm, en particulier entre 7 et 20 µm. Elle concerne également un procédé de renforcement d'un matériau solide, comprenant l'introduction d'une telle structure textile portant un revêtement de parylène dans un matériau de base fluide, de préférence un matériau de base comprenant de l'eau et un liant hydraulique, et le durcissement du matériau de base
Abstract:
Polyparaxylylene (PPX) polymer films that can be expanded into porous articles that have a node and fibril microstructure are provided. The fibrils contain PPX polymer chains oriented with the fibril axis. The PPX polymer may contain one or more comonomer. PPX polymer articles may be formed by applying PPX to one or both sides of a substrate, such as by vapor deposition. The nominal thickness of the PPX polymer film(s) is less than about 50 microns. The PPX polymer film(s) may be removed from the substrate to form a free-standing PPX polymer film(s), which may then be stretched into a porous article.
Abstract:
There is described a reservoir means which means is provided with a moisture resistant coating, the reservoir means is especially adapted to contain a medicament. There is also described a medicament delivery device which comprises a medicament reservoir, a medicament delivery passage and a metering member characterised in that the device includes a surface or surfaces provided with a moisture resistant coating. The device is especially an inhaler, e.g. a dry powder inhaler. A method of treating a respiratory disorder is also described which comprises administering of a therapeutically effective amount of a pharmaceutically active agent to a patient suffering from such a disorder.
Abstract:
L'invention concerne une structure textile à base de fibres de verre, caractérisée par le fait qu'elle porte un revêtement de parylène (poly(para-xylylène)) ayant une épaisseur comprise entre 5 µm et 30 µm, de préférence entre 6 µm et 25 µm, en particulier entre 7 et 20 µm. Elle concerne également un procédé de renforcement d'un matériau solide, comprenant l'introduction d'une telle structure textile portant un revêtement de parylène dans un matériau de base fluide, de préférence un matériau de base comprenant de l'eau et un liant hydraulique, et le durcissement du matériau de base
Abstract:
An abrasive article can include a substrate, abrasive particles coupled by a bond material to the substrate, and a coating overlying at least partially the exterior surface of the bond material. The coating can be a poly(p-xylylene) polymer applied via vapor deposition and may provide enhanced strength to the bond material and extended life time to the abrasive article.
Abstract:
An article comprises a carbon fibre reinforced plastic (CFRP) substrate, a buffer layer disposed adjacent the substrate, the buffer layer comprising a poly(para-xylylene) polymer; and a moisture barrier coating disposed adjacent the buffer layer.
Abstract:
The present invention relates to a method for forming a conformal coating having a reactive surface. In the method, an ultrathin layer composed of a polymer having repeating units derived from unsubstituted p-xylylene, substituted p-xylylene, phenylene vinylene, phenylene ethynylene, 1,4-methylene naphthalene, 2,6-methylene naphthalene, 1,4-vinylene naphthalene, 2,6-vinylene naphthalene, 1,4-ethynylene naphthalene, 2,6-ethynylene naphthalene, combinations thereof, precursors therefor or combinations of precursors therefor, is deposited on a substrate by a thermal CVD process. The surface may be readily modified.