Engineering plastic
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There are a variety of plastic materials having such outstanding physical properties that enable products to be manufactured to meet very demanding application. In this case, Engineering plastic has important role to help you selecting the best material for your product application.
Comparative Properties of Engineering Plastic
| Properties | Nylon | Delrin | Uhmw Pe | Hdpe | Polypropylene |
| Specific gravity | 1.13 | 1.45 | 0.94 | 0.96 | 0.9 |
| Tensile strength p.s.i. | 10,200-12,000 | 10,000 | 2,500 | 3,100-5,500 | 3,200-5,300 |
| Flexural strength p.s.I. | 8,000-16,000 | 14,100 | 1,000 | 1,000 | - |
| Compressive strength, % | 6,700-9,700 | 18,000 | 2,400 | 2,400 | 8,500-10,000 |
| Izod impact, ft-lb/in | 1.0-3.6 | 2 | No break | 1.5-12 | 0.6-6.0 |
| Hardness, rockwell | R111-R118 | R118 | R38 | D60-D70[shore] | R85-R110 |
| Elongation % | 90-320 | 75 | 5 | 15-100 | 200-700 |
| Water absorbtion, % | 1.9-3.3 | 0 | 0 | Less than0.01 | Less than0.01 |
| Modulus of elasticity in tension. 10p.s.I | 1.5-3.6 | 4 | 1 | 0.8-1.5 | 1.3-2.0 |
| Resistance to heat oF | 175 | 185-250 | 250 | 250 | 250-320 |
| Effect of strong acids | Attacked | Attacked | Attacked slowly by oxidizing acids | Attacked slowly by oxidizing acids | Attacked slowly by oxidizing acids |
| Effect of strong alkalies | None | Attacked | Very resistant | Very resistant | Very resistant |
