ACETAL Hampshire, Illinois（伊利诺斯州的缩醛汉普郡）.pdfVIP

ACETAL Acetal is the common name for a family of thermoplastics with the chemical name PolyOxy-Methylene. Acetal is available in a general purpose copolymer grade, a homopolymer version (Delrin ® ), and several filled grades. Acetal provides high strength and stiffness, enhanced dimensional stability, and is easy to machine. As a semi-crystalline material, acetal is characterized by a low coefficient of friction and good wear, high strength, stiffness, dimensional stability, very low moisture absorption, good wear and abrasion resistance and a wide range chemical resistance. ACETAL GRADES ACETAL COPOLYMER (unfilled) The copolymer grade offers excellent performance at a slightly lower cost than Delrin ® . Acetal copolymer may exhibit center line porosity, but porosity- free material is available. Certain grades are FDA, USDA, NSF, Canada AG and 3-A Dairy compliant. Low stress levels and high strength assure flatness and dimensional stability up to a maximum continuous service temperature of 180°F (80°C). Acetal copolymers are available in a wide variety of colors, including RED, ORANGE, YELLOW, GREEN, BLUE, VIOLET, BLACK, WHITE NATURAL. DELRIN ® (unfilled) Delrin ® acetal homopolymer offers slightly higher mechanical properties than acetal copolymer, but may contain a low density center (also known as center line porosity) especially in large cross-sections. The homopolymer also gives slightly less chemical resistance than copolymer acetal. For example, Delrin ® is ideal for small diameter, thin-walled bushings that benefit from the additional strength and rigidity of homopolymer acetal. Delrin ® is available BLACK NATURAL colors. ®