| Mechanical Properties | Moldability Characteristics | ||||||||||
| Resin Generic Name | Some brand names | Strength | Impact Resistance | High Temp. Strength | Warp and Dimen-sional Accuracy, Molded | Fills Small features | Voids in thick sections | Sink in Thick Sections | Flash | High Temp. hard on Mold & Ejectors | Relative Cost |
| Acetal | Delrin, Celcon | Medium | Medium | Medium-Low | Fair | Fair | Poor | Good | Good | Fair | Medium |
| Nylon 6/6 | Zytel | Medium | High | Low | Fair | Excellent | Good | Fair | Poor | Fair | Medium |
| Nylon 6/6, glass filled | Zytel | High | Medium | High | Poor | Good | Excellent | Good | Fair | Fair | Medium |
| Polypropylene | Maxxam, Profax | Low | High | Low | Fair | Excellent | Poor | Poor | Poor | Good | Low |
| High Density Polyethylene (HDPE) | Dow HDPE, Chevron HDPE | Low | High | Low | Fair | Excellent | Unknown | Poor | Poor | Good | Low |
| Polycarbonate | Lexan, Makrolon | Medium | High | Medium High | Good | Fair | Fair to Good | Fair | Good | Good | Medium High |
| Acrylonitrile Butadiene Styrene (ABS) | Lustran, Cycolac | Medium-Low | High | Low | Good | Fair | Good | Fair | Good | Good | Low |
| Polycarbonate / ABS Alloy | Cycoloy, Bayblend | Medium | High | Medium | Good-Excellent | Fair | Good | Fair | Good | Good | Medium |
| Polybutylene Terephthalate | Valox, Crastin | Medium | High | Low | Fair | Fair | Unknown | Fair | Fair | Good | Medium High |
| Polybutylene and Polyethylene Terephthalate, glass filled | Valox, Crastin, Rynite | High | Medium | Medium | Poor | Fair | Good | Good | Fair | Fair | Medium High |
| Polystyrene | Styron | Medium-Low | Low | Low | Good | Good | Unknown | Fair | Fair | Good | Low |
| Thermoplastic Elastomer | Isoplast, Santoprene | Low | High | Low | Poor | Excellent | Excellent | Good | Poor | Excellent | Medium-Low |
| Acrylic | Plexiglass, Acrylite | Medium | Low | Low | Good | Fair | Excellent | Good | Good | Good | Medium |
Notes:
- The resin list is not comprehensive. There are many other resins not listed.
- Most resins' properties can be improved by additives including glass fiber, carbon fiber and many others.
- If dimensional accuracy is critical, use a resin with a good or excellent rating in the dimensional accuracy column.
- See our Resin links section for links to several comprehensive sources of information and numerical data on resins.
(Source:PROTOMOLD)
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