Abstract:
A coating device for coating a coating solution on a web has a roller and a weir which partially constructs a solution store space. In the solution store space the coating solution is stored. When the web sequentially moves in a direction, the roller rotates and the solution in the solution store space is supplied on the web. Thereby a part of the solution overflows the weir such that another part of the solution may remain on the web to have a constant width in a widthwise direction of the web. A drying device has plural drying zones in which the web is fed after the coating of the coating solution. One of the drying zones is neighbored to the coating device. A top of the plural drying zones is constructed of a blow regulation member so as to confront to the solution on the web. The blow regulation member has holes through which is exhausted a gas evaporated from the layer of the solution on the web.
Abstract:
The present invention relates to a method for heat processing a substrate. After a coating film is formed on the substrate, the substrate is baked at a predetermined high temperature. The baking step is performed by first increasing the substrate temperature from a predetermined low temperature to a predetermined intermediate temperature that is lower than a predetermined reaction temperature at which the coating film reacts. Next, a second baking step maintains the substrate at the predetermined intermediate temperature for a predetermined period of time, and is followed by a third step of increasing the temperature of the substrate to the predetermined high temperature that is higher than the predetermined reaction temperature. This results in uniform temperature within the surface of the substrate when the temperature of the substrate reaches the reaction temperature. Consequently, a chemical reaction due to heat processing of the coating film within the surface of the substrate is performed uniformly.
Abstract:
The invention concerns a method for photopolymerizing a polymerisable coating applied on a substrate as well as an installation for implementing said method, enabling very high quality coatings to be obtained and polymerization time to be significantly reduced. Said method is essentially characterized in that it consists in performing at least two rapid simultaneous or successive exposures of the coating deposited on the substrate to infrared rays having different wavelengths derived from at least one generator of short infrared rays (22a) and from at least one generator of medium infrared rays (22b) arranged on the side of said substrate surface (23). The invention is useful for coating industrial and/or household objects made of wood, metal, synthetic or composite materials, or mixtures thereof or the like.
Abstract:
The present invention discloses a photocurable composition that is combinable with a thermally curable clearcoat composition to form a dual curable composition that is useful for forming clearcoats with improved sag resistance. The photocurable composition of the invention includes at least one photocurable oligomer; a first photoinitiator that absorbs light in a first spectral region such that curing of the photocurable composition preferentially occurs near the surface of the of the coating; and a second photoinitiator that absorbs light in a second spectral region such that curing of the photocurable composition occurs throughout the coating. The present invention also provides a method of coating a substrate with a dual curable composition.
Abstract:
A method for producing a high gloss exterior finish on a hearing aid ear shell. The method consists of the steps of: coating the ear shell with a UV-curable substance and/or a stereo-lithography resin; draining the UV-curable substance off the ear shell; exposing the ear shell to UV light to cure the UV-curable substance; removing any excess of the UV-curable substance; and exposing the UV-curable substance to UV light a second time.
Abstract:
A curable, aqueous film-forming composition is provided, comprising: (a) a copolymer containing reactive functional groups and comprising at least 30 mol % of residues having alternating structural units: -[DM-AM]- wherein DM represents a residue from a donor monomer, and AM represents a residue from an acceptor monomer, at least 15 mol % of the copolymer comprising a donor monomer having the structure (I): wherein R1 is linear or branched C1 to C4 alkyl, R2 is selected from methyl, linear, cyclic or branched C1 to C20 alkyl, alkenyl, aryl, alkaryl and aralkyl; and (b) a curing agent having functional groups reactive with the reactive functional groups of (a). The invention is also directed to a multi-component composite coating composition including a base coat deposited from a pigmented film-forming composition and a transparent topcoat applied over the base coat. At least one-coat is the film-forming composition described above.
Abstract:
A curable, aqueous film-forming composition is provided, comprising: (a) a copolymer containing reactive functional groups and comprising at least 30 mol % of residues having alternating structural units: —[DM—AM]— wherein DM represents a residue from a donor monomer, and AM represents a residue from an acceptor monomer, at least 15 mol % of the copolymer comprising a donor monomer having the structure (I): wherein R1 is linear or branched C1 to C4 alkyl, R2 is selected from methyl, linear, cyclic or branched C1 to C20 alkyl, alkenyl, aryl, alkaryl and aralkyl; and (b) a curing agent having functional groups reactive with the reactive functional groups of (a). The invention is also directed to a multi-component composite coating composition including a base coat deposited from a pigmented film-forming composition and a transparent topcoat applied over the base coat. At least one coat is the film-forming composition described above.
Abstract:
A method that allows to obtain embossings on ultraviolet-coated surfaces of panels and the like or of cladding films and also allows to recondition the surfaces and edges of panels of chipboard or the like in order to prepare them for printing or facing, comprising the steps of: coating the surface to be treated and coupling on the fresh UV coating a release element (5) that is not fully opacified or is transparent, so as to allow UV light to pass, allowing partial or total hardening of the photochemical coating, so that the release element can be removed clean, leaving the intended impression on the surface. Full polymerization of the coating is then performed by subjecting the exposed surface to further irradiation.
Abstract:
There are disclosed a method and a machine for applying a strippable paint to a large-sized product finished with a sprayed coating, such as an automobile, to form a protective film on the surface of the coating. The product is kept in stock and will be shipped. Contaminations such as dust are washed away from the surface of the product Then, the strippable paint is applied, preliminarily dried, and non-preliminarily dried to form the protective film out of the strippable paint on the surface of the coating. This protective film is formed easily, appropriately, and certainly. The obtained protective film has a uniform and sufficient thickness. Even if the surface contains unapplied regions to which the paint should not be applied, the paint can be applied to the whole surface of the coating while avoiding the unapplied regions. The application can be performed easily and certainly without leaving unapplied portions around the unapplied regions.
Abstract:
A non-stick polymer coated aluminum foil and method of making it. The polymer coating composition comprises a silicone resin, a silicone release agent, a silicone curing agent, a hindered phenol antioxidant and a solvent. The method of making the non-stick polymer coated aluminum foil includes applying the polymer coating composition on at least a portion of one side of the aluminum foil and partially curing the coating composition to allow handling and future processing of the coated aluminum foil without blocking of the coating composition. The curing of the coating composition is completed by heating the coated aluminum foil in bulk.