Castable Plastic Abutments Polyoxymethylene
Castable Abutments Polyoxymethylene (POM / Delryn / Acetal)
Castable Abutments
POM / Delryn is an homogenous and bending resistant thermoplastic material used in the casting process. The wax casting process is widely used as it offers asymmetrical casting with veryne details to be manufactured relatively inexpensively.
Data Sheet
| Material | POM Polyoxymethylene (POM) | |
|---|---|---|
| Density | g / cm3 | V 1.4 |
| Molding shrinkage, longitudinal/transverse | % | 2.0 / 1.9 |
| Thermal coefficient of linear expansion | 10-4/K | 1.1 |
| Tensile Modulus | MPa | 2700 |
| Yield stress (v=50/mm/min), stress at break | MPa | 65 |
| Yield stress (v=50mm/min) | % | 9.4 |
| Tensile creep modulus, 1000h, stain 0.5% | MPa | 1400 |
| Hardness H358/30 | MPa | 145 |
Advantages
- High abrasion resistance
- Low coefficient of friction
- Natural translucency without metal
- High heat resistance
- Good electrical and dielectric properties
- Low water absorption
- Excellent medical grade plastic
- Excellent casting conditions
- Avoiding residues or sink marks
Material for accurate casting
Our castable products are produced using a unique process provides high quality surface finish on cast items. The material melts during the burnout cycle, allowing it to melt out of the investment without leaving any residue. This material is perfect for producing highly accurate and detailed full partials for direct investment casting. It is also possible to produce a multiple unit bridge with a perfect t. The material used in the process must be selected as to compensate for the dimensional changes that occur during the casting investment, including setting shrinkage/expansion of the casting investment.
