Abstract:
Prior to transfer of an wafer W, a mixed gas is being generated and exhausted, thereby fluctuation of concentration and temperature of a solvent component at the beginning of gas introduction into a chamber 3 is suppressed. A step of gelling after the wafer W is carried into an aging unit is divided into several steps. Until a temperature of the wafer W reaches a predetermined treatment temperature, an average concentration of the solvent component in a mixed gas is gradually raised relative to the temperature of the wafer W. Thereby, immediately after the wafer W is transferred into a sealed chamber, the gas of the solvent component is prevented from condensing.
Abstract:
Disclosed is a method for forming a water-repellent film on the surface of a transparent substrate (e.g., sheet glass). While the film on the coated substrate is dried, the temperature is controlled to fall between 15.degree. C. and 25.degree. C., the relative humidity is controlled to be 30% or preferably from 15% to 20%, and the speed of the air stream to be applied to the coated substrate is controlled to be 0.5 m/min or lower. The water-repellent film formed by the invention has a uniform thickness and good abrasion resistance.
Abstract:
Disclosed is a process to reduce oxygen in an inert gas stream by introducing a reducing gas into the inert gas in the presence of an electron beam. This process of reducing oxygen can be used when producing radiation curable release coatings that need a desired release force. These release coatings, particular, are used in the production of pressure sensitive adhesives.
Abstract:
High solids coating methods and apparatus are disclosed which eliminate many of the disadvantages associated with known coating processes. The techniques disclosed require only a minor amount of a volatile solvent to achieve atomization and application of a paint or other coating material. High solids coating compositions containing about 70-99% by weight solids are atomized and coated. This method also enables polymeric compositions having high molecular weight to be employed as coating materials. According to techniques described, liquid compositions containing film-forming solids are kept under pressure with a minor amount of a highly volatile solvent of from about 1 to 30% by weight, even as low as about 1-10% by weight, at a temperature above the normal boiling point of the solvent. Such a composition is then atomized by releasing the pressure upon a stream of the composition at a temperature above the normal boiling point of the solvent and below the minimum foam temperature at atmospheric pressure for the composition. The film-forming solids are thus conveyed with or without an external atomizing means.
Abstract:
A method is disclosed for keeping a part such as a motor vehicle body wet between preparation stations during preparation for painting by placing the part in an atmosphere of wet vapor. In one embodiment, the part is placed in an enclosure between preparation stations, into which enclosure saturated vapor at a pressure of about 3.5 bars is introduced. The pressure within the chamber is essentially ambient pressure so that the pressurized saturated vapor expands to ambient pressure in the enclosure.
Abstract:
A razor blade having a fluorinated polymer coating over its cutting edge and a method for its preparation. A hydrocarbon polymer is disposed on the cutting edge, which polymer after appropriate sintering is brought into contact with a fluorine-rich atmosphere resulting in replacement of a plurality of hydrogen atoms by fluorine atoms creating a multiplicity of (--CF.sub.2 --CF.sub.2 --) groups.
Abstract:
Oxidation of stranded copper wire during high temperature coating with non-melt-fabricable tetrafluoroethylene polymer is substantially prevented by subjecting the wire to a nonoxidizing atmosphere during heating immediately prior to and during coating.
Abstract:
An improved process for laser or UV curing of pigmented-binder systems comprising ethylenically unsaturated polymers containing at least about 0.05 weight parts of opacifying pigment per weight part of binder wherein the pigmented-binder system includes from about 0.5% up to about 3% of a halogenated derivative of naphthalene in combination with about 0.1 to 2% aromatic amino carbonyl photosensitizers and from about 0.5% to 2% aromatic ketone or aldehyde photosensitizers. The sensitized binder system is a substantially improved system suitable for curing by ultraviolet or laser energy sources.
Abstract:
A METHOD OF COATING A SUPPORT BASE OF A SYNTHETIC MATERIAL, WITH A LAYER OF LACQUER FOR PARTICULAR APPLICATION IN MANUFACTURING MAGNETIC TAPE. THE LACQUER IS FORCED THROUGH A POURING SLIT INTO A PRESSURE CHAMBER WHERE IT IS TEMPORARILY STORED IN CONTACT WITH THE SUPPORT BASE. THE SUPPORT IS GUIDED ALONG THE STORED LACQUER UNDER A TENSILE STRESS AND THE SUPPORT WITH THE ADHERING LAYER OF LACQUER IS THEN GUIDED ALONG A SMOOTHING SIDE IN SUCH MANNER THAT THE PARTS OF THE SUPPORT IN FRONT OF AND BEHIND THE SMOOTHING SIDE FORM AN ANGLE SO THAT THE LAYER IS EQUALIZED. THE PRESSURE IN THE PRESSURE CHAMBER CAN BE CONTROLLED BY CONTROLLING THE ANGLE, THE TENSILE STRESS AND THE QUANTITY OF LACQUER SUPPLIED PER UNIT OF TIME SO THAT THE THICKNESS OF THE LAYER IS ALSO CONTROLLED.
Abstract:
A method of coating a substrate includes the steps of: (i) providing a suspension of dye and a binder in a solvent, wherein the ratio of dye to binder is greater than 40 wt % and the dye is uniformly dispersed in the solvent; (ii) spray-coating the suspension onto the substrate with the majority of the solvent evaporating during the spray coating step to result in a coating of dye and binder on the substrate having a density of up to 0.75 gcm-3; and (iii) continuing step (ii) until the coating thickness is at least 30 micrometres; wherein the dye does not include any carbon nanotubes.