AOC 732 WINDOWS XP DRIVER DOWNLOAD
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AOC 732 DRIVER
The polymeric film forming component of the sizing composition includes a silanated polyvinyl acetate, an epoxidized polyvinyl acetate, and a modified epoxy emulsion. In preferred embodiments, the film formers are present in the sizing composition in ratios of Fibers sized with the sizing composition in a sheet molding compound process have improved wet-out characteristics. For example, glass fibers are used as reinforcements in polymer matrices to form glass fiber reinforced plastics or composites. Glass fibers have been used in the form of continuous or chopped filaments, strands, rovings, woven fabrics, non-woven fabrics, meshes, and scrims to reinforce polymers.
Glass AOC 732 are commonly used as reinforcements in polymer matrices to form glass fiber reinforced plastics or composites because they provide dimensional stability as they do not shrink or stretch in response to changing atmospheric conditions. In addition, glass fibers have high tensile strength, heat resistance, moisture resistance, and high thermal conductivity.
Typically, glass fibers AOC 732 formed by attenuating streams AOC 732 a molten glass material from a bushing or orifice. An aqueous sizing composition containing a film forming polymer, a coupling agent, and a lubricant is typically applied to the fibers after they are drawn from the bushing to protect the fibers from breakage during subsequent processing and to improve the compatibility of the fibers with the matrix resins that are to be reinforced.
After the sizing composition has been applied, the sized fibers may be gathered into separate strands and wound to produce a glass fiber package. The glass fiber package may then be heated to remove water and deposit the size as a residue lightly coating the surface of the glass fiber. Multiple numbers of the resulting dried glass fiber packages may be consolidated and wound onto a spool referred to as a roving doff or package. The roving package is composed of a glass strand with multiple bundles of glass fibers. Reinforcement ravings maybe used in a sheet molding compound AOC 732 process. In an SMC production process, a layer of a polymer film, such as an unsaturated polyester resin or vinyl ester resin premix, is metered onto a plastic carrier AOC 732 that has a non- adhering surface. Chopped glass fiber roving bundles are then deposited onto the polymer film and a second, non-adhering carrier sheet containing a second layer of polymer film is positioned onto the first sheet such that the second polymer film contacts the chopped glass bundles and forms a sandwiched material.
This sandwiched material is then kneaded to distribute the polymer resin matrix and glass fiber bundles throughout the resultant SMC material, which may then be rolled for later use in a molding process. In the production of SMC compounds," it is desirable that the chopped glass fiber bundles contact the polymeric matrix material. One measure of this contact is referred to as wetting, which is a AOC 732 of AOC 732 well the glass bundles are encapsulated by the matrix SMC resin material.
It is desirable to AOC 732 the glass bundles completely wet with no dry glass. Incomplete wetting during this initial processing can adversely affect subsequent processing as well as the surface characteristics of the final composite.
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For example, poor wetting may result in poor molding characteristics of the SMC, resulting in low composite strengths and surface defects in the final molded part. The SMC manufacturing process throughput, such as lines speeds and productivity, are limited by how well and how quickly the roving chopped bundles can be completely wet. Thus, there exists a need in the art for a sizing composition that improves wetting, and correspondingly the SMC production rate and AOC 732 physical properties of the molded composite part. The film forming polymer component is formed of a silanated polyvinyl acetate, an epoxidized polyvinyl acetate, and a modified epoxy emulsion.
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Non-limiting examples of modified epoxy emulsions include amine-modified emulsions and epoxy ester emulsions. The film formers are preferably present in the sizing composition in a ratio of The sizing composition may include a pH adjusting agent such as acetic acid, citric acid, sulfuric acid, or phosphoric acid to adjust the pH. Preferably, the sizing composition has a pH of from 3. It is another object of the present invention to provide a AOC 732 fiber product that contains one or more strands of a reinforcing fiber material at least partially coated with a sizing composition that contains a silanated polyvinyl acetate, an epoxidized polyvinyl acetate, a modified epoxy emulsion, a silane coupling agent, and a lubricant.
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AOC 732 Preferably the silanated polyvinyl acetate, the epoxidized polyvinyl acetate, and the modified epoxy emulsion are present in the size composition in a ratio of Suitable examples of the modified epoxy emulsion include amine-modified emulsions and epoxy ester emulsions. The reinforced fiber product may be in the AOC 732 of a roving.
The silanated polyvinyl acetate, the epoxidized polyvinyl acetate, and the modified epoxy AOC 732 are preferably present in the size composition in aratio of Non-exclusive examples of modified epoxy emulsions include amine-modified emulsions and epoxy ester emulsions. The reinforced composite may be in the form of an exterior body part or a structural body part of an automobile. It is yet another object of the present invention to provide a method of forming a reinforced composite article that includes depositing chopped glass fibers at least partially coated with a sizing composition that contains a silanated polyvinyl acetate, an epoxidized polyvinyl acetate, a modified epoxy emulsion, a silane coupling agent, and a lubricant on a first polymer film, positioning a second polymer film on the chopped glass fibers to form a sandwiched material, and molding the sandwiched material into a molded composite part.
Preferably, the silanated polyvinyl acetate, the epoxidized polyvinyl acetate, and the modified epoxy emulsion are present AOC 732 the size composition in a ratio of Suitable examples of modified epoxy emulsions include, but are not limited to, amine-modified emulsions and epoxy ester emulsions.
It is an advantage of the sizing AOC 732 that the sizing composition provides improved wetting characteristics and thus AOC 732 dry fibers in a sheet molding compound material. Improved wetting characteristics results in greater productivity in-line, a reduction in the number of defects during the molding of a composite part, and a reduction in manufacturing costs.
The foregoing and other objects, features, and advantages of the invention will appear more fully hereinafter from AOC 732 consideration of the detailed description that follows. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of AOC 732 skill in the art to which the invention belongs.
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It is to be AOC 732 that the phrases "size composition", "sizing composition", and "size" are used interchangeably herein. The present AOC 732 relates to improved sizing compositions for fibers that may be used in a sheet molding compound SMC process.
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