Abstract:
A particle for depositing a coating on a substrate surface by a low temperature thermal spray process having a plastic core and a particulate forming an non-continuous cladding layer around the plastic core so that enough heat can be transferred to the plastic core to cause it to melt but not so much so as to vaporize the plastic core. At the same time the particulate cladding material having a higher melting point does not melt. A particle having an inorganic core clad to a plastic outer layer is also provided. A process for making the clad material and for thermally spraying the clad material is provided. An article coated with the clad material is also provided.
Abstract:
A process for application of a protective coating to a steel, concrete, or wooden structure so as to provide protection against corrosion, weathering, or other environmental damage in which the surface to be protected is heated to a temperature in a range of about 75.degree. F. to about 150.degree. F. after which a liquid thermoset primer is applied to the heated material in two stages. The first portion is solidified by heating and then coated with a second portion, forming an uncured liquid thermoset outer primer layer. A melted polymer powder layer is then applied by flamespraying over the uncured liquid thermoset primer layer, forming an intermediate polymer powder layer embedded in the uncured liquid thermoset primer layer. The intermediate melted polymer powder layer is then heated to a flow temperature of the polymer powder and a second layer of melted polymer powder is applied over the intermediate polymer powder layer, forming an outer melted polymer powder layer which then cools to form the final protective coating.
Abstract:
A roll and a method for coating a roll in a paper machine with powder of thermo-plastic and/or specialty plastic. The coating is carried out by spraying by using hyper-sonic plasma.
Abstract:
A coated object is produced by flame spraying the object with a substantially molten polymeric material which comprises a linear alternating polymer of ethylene and at least one ethylenically unsaturated hydrocarbon optionally blended with a copolymer of ethylene and .alpha.,.beta.-ethylenically unsaturated carboxylic acid.
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:
A method of protecting the surface of a moulded plastic part made from synthetic resin, fillers and/or fibers by application of a protective film of ceramic, metallic, or metallic-ceramic composition which is sprayed onto the surface of the parent material wherein the adhesion between the parent material and the sprayed-on protective film is improved by application of an intermediate stratum, in the form of a fabric or other mesh-like material made from an organic or inorganic substance, to the surface of the parent material prior to the spraying step. The mesh-like material is resistant to temperatures higher than the curing temperature of the synthetic resin and may be applied either simultaneously with production of the moulded plastic part and afterwards by means of adhesives.
Abstract:
The flame spraying of high temperature plastic powder as for example polyimides, polyamide-polyimides, polyester imides, or aromatic polyester high temperature plastics in admixture with a flame spray metal powder as for example aluminum alloy, nickel, copper, bronze, babbitt or stainless steel flame spray powder.