Polyurethane combines the best properties of both plastic and rubber. It offers abrasion and tear resistance, high tensile and elongation values, and low compression set. Polyurethane is naturally flexible and exhibits virtually unlimited flexural abilities.
Combining good chemical resistance with excellent weathering characteristics sets polyurethane apart from most other thermoplastics. It has exceptional resistance to most gasolines, oils, kerosene, and other petroleum-based chemicals, making it an ideal choice for fuel lines (although additives in today’s gasoline and petroleum products warrant field testing).
The two basic formulations of urethane, ester and ether, have some important differences. Water attacks ester-based urethane, causing a significant reduction in physical properties. Ether urethanes exhibit far superior hydrolytic stability, especially in humid environments. Ether-based materials also resist fungus growth better than ester-based materials.
Polyethylene has long been recognized as an engineering plastic that exhibits a high degree of inertness, making it attractive for use in markets such as food and beverage, laboratories, and chemical processing where leaching or permeability would present risks. Polyethylene is also one of the lower-cost plastic materials and satisfies many requirements that call for inexpensive, lightweight tubing.
Thermoplastic rubber (TPR) combines the processability of plastics with the flexibility and durability of rubbers. Typically more light weight and formable than rubber, TPR has been growing in acceptance for many applications over the last decade.
TPR provides outstanding compression characteristics, making it an ideal fit for use with peristaltic pumps. The material also offers excellent resistance to flex fatigue and tear. It maintains good flexibility to temperatures approaching -80°F.
Manufactured from FDA-sanctioned ingredients for use with food contact surfaces
Lowest coefficient of friction of any solid material
Widest service temperature of any plastic tubing (-275°F to 500°F)
Excellent electrical and weatherability properties; non-flammable
Made without plasticizer which can leach into critical streams
Ultra-high-purity grades available for the semiconductor industry
Applications:
Adhesives
Beverage
Chemical Plants
Corrosives
Cryogenics
Deionized Water Transfer
Food Transfer
Lighting Covers
Laboratory
Medical
Paint Spray
Pure Water Systems
Sight Glass
Solvents
Water Sampling
Wire Insulation
Please consult Customer Service at toll free 1-800-876-5340 or e-mail us at mail@dunhamrubber.com to discuss sizes and specifications available for your application requirements.
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