Equistar introduces 2 foam concentrates
Equistar Chemicals LP debuted two foam concentrates for structural foam molding and extrusion. The Houston firm claims the blowing agent concentrates have high gas yield at low processing temperatures.
Spectratech FM 3061H is an endothermic concentrate for styrenics and polyolefins at typical levels of 1.5-3 percent. The carbonate/acid blowing agent is a 50 percent concentrate in polyethylene and gases at 375° F.
Spectratech FM 3031L, also an endothermic product, is suited to polystyrene and PE and gases as low as 375° F. The 20 percent carbonate/acid system in PE is typically used at levels of 1-4 percent.
Tel. (713) 652-7300, fax (713) 652-4151.
Axel offers solution for releasing molds
Axel Plastics Research Laboratories Inc. developed a semipermanent mold release for thermoplastic composites and rubber.
Xtend is available in water or solvent-based formulations. It is a reactive resin solution that cross-links and cures on the mold to provide an inert and durable release surface, said the Woodside, N.Y., firm.
Tel. (800) 332-2935 or (718) 672-8300, fax (718) 565-7447, e-mail: [email protected]
Reifenhauser converts to A-B control system
Blown film equipment maker Reifenhauser Inc. of Lawrence, Mass., has switched controller suppliers for its UFA film winders.
Reifenhauser dropped Siemens Energy & Automation Inc. and switched to Allen-Bradley Co. Inc. to supply controllers for winders sold in North America. Reifenhauser's parent company makes the winders in Germany. Siemens still supplies controllers for the winders sold in Europe, said Matthew Bangert, Reifenhauser's general manager.
Bangert said he picked Allen-Bradley because customers wanted better service and easier access to replacement parts in the United States.
Tel. (978) 686-2700, fax (978) 686-4765.
Slide reformulates releases, cleaners
Slide Products Inc. has reformulated its mold releases and mold cleaners to eliminate methylene chloride.
The Wheeling, Ill., firm said it has five Econo-Spray mold releases, including Econo-Spray 5, a dry film grade with small lubricant particles. This product repels dust and is well-suited to molding deep-draw products. Slide also offers mold cleaners and rust preventive agents.
Tel. (800) 323-6433, fax (800) 756-7986, e-mail [email protected] ucts.com.
Research Frontiers processes film faster
Research Frontiers Inc. has developed a faster process to make film with controllable transparency.
The company has suspended particle technology that controls light transmittance by electrical voltage. Research Frontiers invented a way of treating film with light-absorbing, microscopic particles. The particles make film opaque until electric current passes through the film, when it becomes clear.
The Woodbury, N.Y., firm developed a film-treating process that can be cured with ultraviolet light rather than the slower heat- curing method. Research Frontiers offers licenses for its technology. Its films are increasingly used in glazing, sunroofs, visors, eyewear and other products.
Tel. (516) 364-1902, fax (516) 364-3798, e-mail [email protected]
Leistritz targeting tubing and profiles
American Leistritz Extruder Corp. is bringing in-line compounding to the tubing and profile extrusion market.
Leistritz, of Somerville, N.J., has introduced a high-speed twin-screw extrusion system for tubing and profiles.
According to Leistritz, twin-screw in-line compounding is difficult in tubing and profile manufacturing because it combines conflicting types of processing. Compounding and devolatizing are high mass-transfer operations where consistent pumping is secondary. Accurate pumping and pressures — traditionally the strong point of single-screw extruders — are key to direct extrusion.
The Leistritz machine uses a proprietary closed-loop pressure feedback to optimize dimensional control.
Analyzing inputs from the system, the controller corrects the screws' revolutions per minute and feed rate to maintain the gear-pump inlet pressure. That allows back pressure to be held constant, giving consistent shear and mixing.
Tel. (908) 685-2333, fax (908) 685-0247, e-mail [email protected]