Abstract:
An improved sponge applicator and an improved contact coating apparatus for coating with liquid the outside surface of containers such as glass or plastic bottles is provided. The improved sponge applicator comprises an open cell foam having at least one surface for contacting and applying liquid to the container, and at least one section having a sealed surface for retarding flow of liquid from the sponge through the sealed surface and at least one unsealed surface for contacting the container, the sponge having an internal porosity allowing for flow of liquid through the open cell structure of the sponge. A method of sealing surfaces of an open-cell foam is also provided comprising swelling the foam with liquid, expelling excess liquid from the sponge and applying a sealant to the surface of the foam while the foam is still in its swelled shape, and curing the sealant on the sponge. An improved contact coating apparatus for bottles is also provided comprising means for rotating a container to be coated, a sponge coating applicator having several sealed surfaces and at least one unsealed surface, means for contacting the container with an unsealed surface of the sponge coating applicator, and means for supplying coating liquid to the sponge coating applicator.
Abstract:
In a wet-type coating apparatus, a gravure roll tapered at both end portions thereof is provided. In this case, the tapered portions are located beneath non-pixel-forming areas present on both sides of an effective pixel forming area of a silicone blanket. With this arrangement, a coating liquid is supplied and applied to the surface of the silicone blanket from the lower side thereof while the film width of a contacted liquid portion held between the effective pixel forming area and the surface of the gravure roll is kept uniform along the direction of the rotational axis of the silicone blanket. By this coating method, the nonuniformity of film width of the contacted liquid portion and the like are absorbed by the tapered portions corresponding to the non-pixel-forming areas.
Abstract:
A fabric having good wrinkle resistance and a soft hand is described. A process for producing the fabric is also described. The process involves applying a softener to one side of the fabric and applying a wrinkle-reducing resin to the opposite side of the fabric using a foaming application method, such that the respective finishes are concentrated on the surface to which they were applied. Preferably, the softener is applied to the face of the fabric and the resin chemistry is applied to the back of the fabric. The resulting fabrics have hand characteristics comparable or superior to those of pure finished fabrics, while having wrinkle-resisting characteristics of typical resin-treated fabrics.
Abstract:
It is an object of the present invention to provide a coating apparatus and a coating method that can effectively prevent thick coating and the like in a bar coater having a coating bar and a fulcrum supporting the coating bar from the below. The coating apparatus comprising a coating liquid-adhering device for adhering the coating liquid across an entire width of one surface of a continuously travelling belt-shaped body; a coating thickness-adjusting device located downstream from the coating liquid-adhering device with respect to the travelling direction of the belt-shaped body, and adjusting a thickness of a layer of the coating liquid adhered to the belt-shaped body by the coating liquid-adhering device into a predetermined thickness; and a drying-preventative device for preventing the coating liquid at the coating thickness-adjusting device from drying.
Abstract:
A method of forming a coating of a polymer-based paint composition on a substrate (1) is disclosed The method is based on the use of pellets (13) rather than solid blocks of the paint composition. The method includes pre-heating a substrate (1) to a temperature that is above the glass transition temperature of the polymer of the paint composition and supplying pellets (13) of the paint composition to the surface of the substrate (1) whereby the pellets (13) progressively melt into a liquid state. Thereafter, the method includes forming a coating of the liquid paint composition on the substrate surface (1) and converting the liquid coating into a solid coating of the paint composition.
Abstract:
A process for chemical removal of organically-modified silicate (Ormosil) coatings from aluminum alloy substrates without degradation of the underlying metal. An Ormosil film is treated with a zincate solution. The zincate solution dissolves the Ormosil film and deposits a thin, easily-removed layer of zinc onto the aluminum alloy surface, which prevents base-activated dissolution of the underlying metal. The zinc layer may be removed using dilute phosphoric acid, leaving the surface of the aluminum alloy intact. Consequently, the sol-gel coating may be removed while the integrity of the aluminum alloy substrate is maintained.
Abstract:
The present invention is a method of coating a substrate. First, a layer of liquid polymeric coating having a pigment and a solvent is applied to the substrate. An ultrasonic acoustic source is then provided and operated at a frequency of from about above 40 kHz to provide an acoustic pressure field and an acoustic pressure of above 190 dB and directing the main lobe of the acoustic pressure field toward the layer of liquid polymeric coating. This acoustic pressure field reduces the gradient in and smoothes any uneven surface features in the liquid polymeric coating.
Abstract:
A liquid coating is formed on a substrate by electrostatically spraying drops of the liquid onto a liquid-wetted conductive transfer surface and transferring a portion of the thus-applied liquid from the transfer surface to the substrate. Optionally, one or more nip rolls force the substrate against the transfer surface, thereby decreasing the time required for the drops to spread and coalesce into the coating. Preferably, the coating is passed through an improvement station comprising two or more pick-and-place devices that improve the uniformity of the coating. The coating can be transferred from the conductive transfer surface to a second transfer surface and thence to the substrate. Insulative substrates such as plastic films can be coated without requiring substrate pre-charging or post-coating neutralization. Porous substrates such as woven and nonwoven webs can be coated without substantial penetration of the coating into or through the substrate pores.
Abstract:
A paint roller apparatus for applying paint to a painted surface includes a rotating accessory arm. The rotating accessory arm is rotatably mounted on a handle of the paint roller apparatus such that the accessory arm rotates between a first position wherein an accessory or the accessory arm is substantially proximate to a cylindrical roller of the paint roller apparatus and a second position where the accessory arm is at an angle of substantially ninety degrees to a plane defined by the longitudinal axes of the handle and the roller. A switch assembly located on the handle provides for rotation of the accessory arm with minimal effort on the part of the user. The switch assembly may include a locking mechanism to lock the accessory arm into the first position and second position so that the accessory arm does not rotate inadvertently.