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Laboratory Information 
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Published Articles 
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Acetal Resin Characteristics Dental - D® is a registered trademark and material of Quattro Ti S.r.l. ,via Vittorio Veneto 34 , 22070 Rovello P., Italy. Polyacetals belong to the category of plastics for technical purposes.They exhibit remarkable dimensional stability , hardness , rigidity , mechanical strength , good toughness and resistance to chemical agents , as well as a good anti-friction and wear performance and can so , in many cases , be used as substitutes for metals. density , 1.41 g/cm3 up to 1.43 g/cm3 structure ,highly crystaline thermoplastics with linear unbranched chains up to 75% of crystallinity. natural colour , matt white only due to their crystallinity.Can be coloured in all shades with a good surface brightness. mechanical characteristics , high mechanical strength and rigidity with good toughness , good wear resistance and a low sliding friction coefficient. chemically resistant to ( selection ) , numerous organic substances such as alcohol , aldehyde , aster , ether , glycol , petrol , mineral oil , strong alkaline solutions , and a good resistance to hydrolysis. non-resistant to ( selection ) , oxidizing chemical agents and strong acids ( pH >4 ).Long term usage in 65° C water is not possible. physiological behaviour , safe from the physiological viewpoint. cracks due to internal stress , in the open air virtually do not develop. As for greater internal stress , cracks may develop in a few substances.
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© Martyn R Young
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