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  • Common Questions on the Polyurethane Molding Process
    Common questions on the molding process of polyurethane as applied to the industrial caster & wheel industry. Covers various bonding attributes and procedures in a general view of the concepts utilized.
  • Polyurethane
    Extremely wide variations in forms and in physical and mechanical properties are available in polyurethanes. Grades can range in density from 0.5 lb/ft3 in cellular form, to over 70 lb/ft3 in solid form, and in hardness from rigid solids at 85 Shore D to soft, elastomeric compounds. Polyurethane
  • Closing In With Polyurethane RIM
    Reaction-injection molding can simplify the task of designing good looking and economical medical enclosures. Specialty RIM Group, Polyurethanes Div. When searching for a material for the top cover, reagent box, and enclosure panels for a medical-diagnostic system, Bayer Diagnostics found
  • Medical Device Link .
    Prototypes or limited production runs of plastic injection-molded parts can be provided in less than 3 weeks. The company also provides rubber molds, polyurethane duplicates, metal castings, and patterns for investment casting, sand casting, and vacuum molding. 9139 Lurline Ave., Chatsworth, CA
  • Medical Device Link .
    Dip Molding of Polyurethane and Silicone for Latex-Free, Nonallergenic Products As more healthcare facilities require latex-free products to minimize the risk of allergic reactions among patients and staff, the demand accelerates for alternative elastomeric materials. Medical device manufacturers
  • RIM goes bumper to bumper
    . Reaction-injection molding (RIM) is a relatively new manufacturing technology that produces highquality polyurethane auto parts. One of the earliest commercial applications of RIM was the all-polyurethane bumper fascia on the Monza 2 + 2 for General Motors in the early 1970s. That application
  • Medical Device Link .
    Medical Device & Diagnostic Industry Reaction injection molding (RIM) creates parts by using impingement mixing to combine reactive liquid intermediates as they enter a mold. RIM differs from traditional injection molding because it forms solid parts by cross-linking or polymerization in the mold
  • Medical Device Link .
    , hydrocarbon, polyethyleneoxide, sulfonate groups, and other materials can be covalently bonded to the polyurethane for specific applications. The Polymer Technology Group Inc. , 2810 7th St., Berkeley, CA 94710. An implant-grade liquid silicone rubber system is designed to create elastomers
  • No stress nylon
    Low-pressure reaction-injection molding is a way of making large nylon parts with low internal stress. The part depicted on the right is UHMW centerbowl. The part on the left is a RIM-processed centerbowl and the one in the center is a RIM-processed centerplate liner. All parts fit into the 17-in
  • Hungry for large parts? Try a composite sandwich
    technology is a multistep sandwich composite made by combining three primary processes -- thermoforming, reinforced fiber preforming, and polyurethane foam molding. Complex, three-dimensional parts as large as 25 to 250 ft2, in production volumes beginning at 10,000 units, are possible. The new
  • Medical Device Link .
    important to the medical device industry. (Painesville, OH) presented several new products including sterilization-indicator tapes, wound-care products featuring bidirectional stretch, and new formulas of polyurethane and PVC foams. The company noted that 80% of its products are custom made. (West Chester
  • Think cast urethane for feedpath components
    ideal for the shape, the package, and machine. Polyurethane is typically an insulator (volume resistivity from E10 to E13 ohm-cm), but can be custom formulated with conductivity (volume-resistivity) as low as E5 ohmcm. In addition, a process patented by Mearthane avoids high additive loading
  • Medical Device Link . Top Products and Services of the Year: Reader's Choice
    the same level of design flexibility as plastic injection molding provides for plastic parts, the metal injection molding (MIM) process makes possible the economical production of highly configured small metal components from a wide range of materials including steels and stainless steels. Parts weighing
  • Better bones
    modeling project starts with a bone from a medical cadaver. Through a series of process steps, Pacific Research creates an epoxy tool for molding the composite bones. The RenCast 2000 epoxy used to cast the tooling, also from Huntsman, exhibits low shrinkage (0.001 in./in.), so the composite bones
  • Medical Device Link . Environmental-Stress-Crack Resistance of Rigid Thermoplastic Polyurethanes
    class of materials that provide a practical balance among a variety of properties are rigid thermoplastic polyurethanes (RTPUs), which demonstrate a useful combination of toughness, clarity, fatigue and wear resistance, chemical resistance, and dimensional stability. Another unique feature of RTPU

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  • Polyurethanes
    A formulation for polyurethane molding is presented that produces a castable product, which is useful in the auto and electrical industry as casings for cables and as hose for conveying combustible liquids and powders.