Acetal Delrin Sheet

<spanVerdana",sans-serif; mso-bidi-font-family:SimSun;color:#222222;mso-font-kerning:18.0pt">Acetal Delrin Sheet <spanArial",sans-serif; color:#222222;mso-font-kerning:0pt">Acetal resins (polyoxymethylene or POM) are engineering thermoplastics based on formaldehyde polymerization technology. Acetal resins have high tensile strength, stiffness, resilience, fatigue endurance, a low coefficient of friction against metals, acetals and other plastics and moderate toughness. The Acetal sheet has high resistance to organic solvents, excellent dimensional stability, a low coefficient of friction and outstanding abrasion resistance among thermoplastics. <spanArial",sans-serif; color:#222222;mso-font-kerning:0pt">Acetals’ resistance to creep is excellent. Moisture, lubricants and solvents including gasoline and gasohol have little effect on this property, which is important in parts incorporating self-threading screws or interference fits. Good electrical properties qualify these materials for electrical applications requiring long-term stability. Acetal copolymers retain much of their toughness through a broad temperature range and are among the most creepresistant of the crystalline thermoplastics. A low moisture absorption characteristic permits molded parts to serve reliably in environments involving humidity variations. <spanArial",sans-serif; color:#222222"> <spanArial",sans-serif; color:#222222">Features · <spanArial",sans-serif; color:#222222">Excellent dimensional stability · <spanArial",sans-serif; color:#222222">Continuous use temperature of 180°F · <spanArial",sans-serif; color:#222222">Porosity free · <spanArial",sans-serif; color:#222222">Consistent properties in wet or moist environments · <spanArial",sans-serif; color:#222222">Very low moisture absorption · <spanArial",sans-serif; color:#222222">Excellent electrical properties · <spanArial",sans-serif; color:#222222">Easy to machine to close tolerances · <spanArial",sans-serif; color:#222222">Natural and Black are FDA & USDA compliant <spanArial",sans-serif; color:#222222">Applications · <spanArial",sans-serif; color:#222222">Bushings and bearings · <spanArial",sans-serif; color:#222222">Rollers and gears · <spanArial",sans-serif; color:#222222">Valves and manifolds · <spanArial",sans-serif; color:#222222">Scraper blades · <spanArial",sans-serif; color:#222222">Wear strips and pads · <spanArial",sans-serif; color:#222222">Jigs and fixtures · <spanArial",sans-serif; color:#222222">Electrical components · <spanArial",sans-serif; color:#222222">Parts which operate in water between 60 to 90C <spanArial",sans-serif; color:#222222">Certifications · <spanArial",sans-serif; color:#222222">ASTM POM 0211, D6778 · <spanArial",sans-serif; color:#222222">FDA21 CFR 177.2470 Properties Standard Unit Result mechanical property Density ASTM D792 g/cm3 1.43 Tensile strength ASTM D638 Mpa 100 ultimate elongation ASTM D638 % 10 bending strength ASTM 790 Mpa 150 bending modulus ASTM 790 Mpa 4500 hardness ASTM D2240 D 85 Impact strength ASTM D256 J/M 100 Thermal properties Melting poing DSC ℃ 190 working Temp. ASTM D648 ℃ 140 Permanent Temp. - ℃ 120 Short-period Temp. - ℃ 150 Pyroconductivity DIN 52612-1 W/(K-M) 0.31 dilatation coefficient ASTM D696 10-5-1/K 6 electrical property dielectric strength ASTM D150 KV-mm 22 dielectric loss coefficient ASTM D150 - 0.005 Volume resistance ASTM D257 Ω.cm 1014 surface resistance ASTM D257 Ω 1016 dielectric constant ASTM D149 - 3.9 Chemical properties Water absorption 23℃ 60%RH % 0.35 Acid resistance 23℃ 60%RH   + Alkali resistance     + Resistance to acid and alkali water     + Chloric acid alkali resistance     0 Resistant to aromatic compounds     + The ketone resistance 23℃ 60%RH   + Water resistance 23℃ 60%RH   + Others properties combustibility UL 94   HB paste -   + Non-toxic harmless EEC 90/128 FDA   + friction coefficient DIN 53375   - uvioresistant -   0