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3D-CAM SLl 7870 Polycarbonate-like Resin
PRODUCT DESCRIPTION:
RenShape® SL 7870 stereolithography material is a water clear, low viscosity stable liquid that produces high clarity models and prototypes with good surface finish and detail. The SL 7870 prototypes also exhibit good dimensional stability even in a humid atmosphere. Parts made from SL 7870 deliver high impact resistance while retaining durability over time.
PROPERTIES
| MEASUREMENT | CONDITION | VALUE |
| Appearance | Clear liquid | |
| Density | @ 25°C (77°F) | 1.13 g/cm3 |
| Viscosity | @ 28°C (82°F) | 210 cps |
| Viscosity | @ 30°C (86°F) | 180 cps |
| Penetration depth (Dp) | 7.2 mils | |
| Critical exposure (Ec) | 10.6 mJ/cm2 | |
| Part building layer thickness* | 0.10mm (0.004 in.) |
Post-Cured Material
| MEASUREMENT | TEST METHOD | VALUE 90-minute UV post-cure |
VALUE 90-minute UV + 2 hours @ 80°C (176°F) thermal postcure |
| Hardness, Shore D | ASTM D-2240 | 86 | 87 |
| Flexural modulus | ASTM D-790 | 1,980-2,310 MPa (286-333 ksi) |
2,010-2,350 MPa (289-338 ksi) |
| Flexural strength | ASTM D-790 | 65-71 MPa (9,400-10,300 psi) |
65-74 MPa (9,400-11,000 psi) |
| Tensile modulus | ASTM D-638 | 1,930-2,020 MPa (278-291 ksi) |
1,860-2,030 MPa (268-292 ksi) |
| Tensile strength | ASTM D-638 | 38-42 MPa (5,470-6,050 psi) |
39-42 MPa (5,620-6,050 psi) |
| Elongation at break | ASTM D-638 | 10-22% | 10-23% |
| Impact strength, notched Izod | ASTM D-256 | 45-61 J/m (0.85-1.15 ft.-lb./in.) |
43-60 J/m (0.81-1.13 ft.-lb./in.) |
| Heat deflection temperature | ASTM D-648 @ 66 psi @ 264 psi |
48°C (118°F) 41°C (106°F) |
49°C (120°F) 43°C (109°F) |
| Glass transition, Tg | DMA, E peak | 56°C (133°F) | 57°C (135°F) |
| Coefficient of thermal expansion | TMA (T<Tg) TMA (T>Tg) | 97 x 10-6/°C 216 x 10-6/°C |
87 x 10-6/°C 213 x 10-6/°C |
| Cured Density | 1.15g/cm3 |