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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&COPY Martyn R Young
Cotswold Dental Laboratory Ltd
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