Abstract:
A hybrid film, comprising a first polymer film having a plasma-treated surface and a second polymer film having first and second surfaces, with the first surface of the second polymer film being disposed along the first plasma-treated surface of the first polymer film, has superior thermal and mechanical properties that improve performance in a number of applications, including food packaging, thin film metallized and foil capacitors, metal evaporated magnetic tapes, flexible electrical cables, and decorative and optically variable films. One or more metal layers may be deposited on either the plasma-treated surface of the substrate and/or the radiation-cured acrylate polymer. A ceramic layer may be deposited on the radiation-cured acrylate polymer to provide an oxygen and moisture barrier film. The hybrid film is produced using a high speed, vacuum polymer deposition process that is capable of forming thin, uniform, high temperature, cross-linked acrylate polymers on specific thermoplastic or thermoset films. Radiation curing is employed to cross-link the acrylate monomer. The hybrid film can be produced in-line with the metallization or ceramic coating process, in the same vacuum chamber and with minimal additional cost.
Abstract:
A method of making a polymer coating on a microstructured substrate. The method may be performed by vaporizing a liquid monomer or other pre-polymer composition and condensing the vaporized material onto a microstructured substrate, followed by curing. The resulting article may possess a coating that preserves the underlying microstructural feature profile. Such a profile-preserving polymer coating can be used to change or enhance the surface properties of the microstructured substrate while maintaining the function of the structure.
Abstract:
A hybrid film, comprising a first polymer film having a plasma-treated surface and a second polymer film having first and second surfaces, with the first surface of the second polymer film being disposed along the first plasma-treated surface of the first polymer film, has superior thermal and mechanical properties that improve performance in a number of applications, including food packaging, thin film metallized and foil capacitors, metal evaporated magnetic tapes, flexible electrical cables, and decorative and optically variable films. One or more metal layers may be deposited on either the plasma-treated surface of the substrate and/or the radiation-cured acrylate polymer A ceramic layer may be deposited on the radiation-cured acrylate polymer to provide an oxygen and moisture barrier film. The hybrid film is produced using a high speed, vacuum polymer deposition process that is capable of forming thin, uniform, high temperature, cross-liked acrylate polymers on specific thermoplastic or thermoset films. Radiation curing is employed to cross-link the acrylate monomer. The hybrid film can be produced in-line with the metallization or ceramic coating process, in the same vacuum chamber and with minimal additional cost.
Abstract:
A method for modifying the surface of a polymer article, which comprises applying to the polymer article a macromer having a radical polymerizable double bond, followed by treatment with non-polymerizable plasma.
Abstract:
This invention relates to the use of low temperature plasma technology for significantly improved corrosion protection of steel. The plasma process involves pretreating of the steel surfaces by oxygen plasma and thin film deposition by polymerization of certain precursors on the steel. The process utilizes DC power, substrates as the cathode, magentron anodes, and system pressures of 0.01-0.5 torr. After the thin film plasma deposition it is also preferably to put a primer coating over the thin film.
Abstract:
Thin, pinhole-free, adherent, colored polymeric coatings and articles are produced by plasma polymerization followed by a heat treatment. The polymer precursor is mixed with a dye or pigment and shaped into a self-supporting thin article or applied to a substrate. The coating or article is then polymerized under plasma conditions created by an applied electrical field. Subsequent heat treatment further cures the polymer and makes the coating adherent to the substrate.
Abstract:
A method for coating a cylindrical container with a thin, resinous coating by spraying powdered resin is disclosed. The technique involves spraying of finely divided resin particles at a velocity of at least about 200 feet per minute from a spray nozzle external to the container into the interior of a rapidly revolving container, particularly slender, cylindrical containers. The container may be sprayed by directing a pulse of a predetermined quantum of resin into the container to deposit a substantially uniform coating. Alternatively, a continuous flow of resin at a predetermined rate may be sprayed into a container. The resin particles are caused to adhere to the container by preheating the container. The coating is rendered continuous by preheating the container to temperatures above the softening point of the resin. Postheating of the coated container at temperatures in excess of about 300.degree. F matures the coating.
Abstract:
The invention relates to a lubricant coating (5) for a medical injection device (1), comprising successively: —a bottom layer (50) in contact with the medical device surface (21) of the container to be lubricated, comprising a mixture of cross-linked and non-cross-linked poly-(dimethylsiloxane), —an intermediate layer (51) consisting essentially of oxidized poly-(dimethylsiloxane) and having a thickness comprised between 10 and 30 nm and, —a top layer (52) consisting essentially of non-cross-linked poly-(dimethylsiloxane) and having a thickness of at most 2 nm. The invention also relates to a medical injection device comprising such a lubricant coating, and a manufacturing process for said coating.
Abstract:
The disclosed technology relates to methods, apparatuses and systems for detecting molecules using surface plasmon resonance techniques, and more particularly to surface plasmon resonance techniques that employ metal nanoparticles formed on substrates. In one aspect, method of making a layer of metallic nanoparticles includes providing a liquid composition comprising a binder polymer and a solvent and at least partially immersing, into the liquid composition, an article comprising a polymeric surface, wherein the polymeric surface comprises a polymeric material and does not comprise an inorganic glass or crystalline material. The method additionally includes applying a gas phase plasma to the liquid composition to facilitate chemical reactions between the binder polymer and the polymeric material of the polymeric surface to form a binder layer on the polymeric surface of the article. The method further includes applying metallic nanoparticles onto the binder layer to form a metallic nanoparticle layer on the binder layer.
Abstract:
The invention relates to the use of a composition for in vacuo coating of a substrate, the composition comprising: at least 50% by weight an acrylate monomer or an oligomer formed from the acrylate monomer, the acrylate monomer having the formula H2C═CHCO2CH2CH(OH)R, where R is an optionally substituted alkyl, alkenyl, aryl, or heteroaryl; and 0.5 to 15% by weight an adhesion promoter. The present invention also related to uses of the composition and methods of coating a substrate in vacuo using the composition.