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3D-CAM SL 7811: STEREOLITHOGRAPHY MATERIAL Solid State Laser

SL 7811 stereolithography material is a white, low viscosity stable liquid that produces strong white models and prototypes with good surface finish and detail, an ABS-like appearance.

PROPERTIES

MEASUREMENT CONDITION VALUE
Appearance White liquid
Density @ 25°C (77°F) 1.11 g/cm3
Viscosity @ 28°C (82°F) 240 cps
Viscosity @ 30°C (86°F) 210 cps
Penetration depth (Dp) 5.25 mils
Critical exposure (Ec) 10.97 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 86
Flexural modulus ASTM D-790 1,500-2,200 MPa
(220-320 ksi)		 1,500-2,000 MPa
(220-2900 ksi)
Flexural strength ASTM D-790 35-54 MPa

(5,000-7,800 psi)

 33-52 MPa

(4,800-7,500 psi)
Tensile modulus ASTM D-638 1,500-2,000 MPa
(220-290 ksi)		 1,500-2,000 MPa
(220-290 ksi)
Tensile strength ASTM D-638 34-42 MPa
(4,900-6,000 psi)		 34-40 MPa
(4,900-5,800 psi)
Elongation at break ASTM D-638 15-30% 15-30%
Impact strength, notched Izod ASTM D-256 J/m
(0.78-1.10 ft.-lb./in.)		 J/m
(0.80-1.21 ft.-lb./in.)
Heat deflection temperature ASTM D-648
@ 66 psi
@ 264 psi		 47°C (117°F)
–°C (–°F)		 46°C (115°F)
–°C (—°F)
Glass transition, Tg DMA, E” peak 63°C (145°F) n/a
Coefficient of thermal

expansion

 TMA (T<Tg) TMA (T>Tg) 92 x 10-6/°C
207 x 10-6/°C		 n/a
Cured Density 1.15g/cm3 n/a