Tuffalloy™ is an advanced chemistry developed by Hapco to meet today’s market demands for prototype and low production parts that mimic the physical attributes of many injection molding materials.
Tuffalloy™ 4270 Series
- Tuffalloy™ 4270 series are low viscosity Liquid Molding Compounds with outstanding physical properties such as high impact, high heat distortion, and high tensile strength.
- The 4270 Series is available in 4 speeds; 15, 7, 2, and 1 minute. The user has the ability to use a slower speed initially and increasing to a faster speed when using meter-mix dispensing equipment.
| Physical Properties |
Tuffalloy 4270 |
Tuffalloy 4272 |
Tuffalloy 4274 |
Tuffalloy 4275 |
| Mix Ratio by Volume A:B |
100:100 |
100:100 |
100:100 |
100:100 |
| Mix Ratio by Weight A:B |
100:85 |
100:85 |
100:85 |
100:85 |
| Gel Time 100 grams @ 25˚C |
15 min. |
7 min. |
2 min. |
1 min. |
| Color (cured) |
Light Brown Opaque |
Light Brown Opaque |
Light Brown Opaque |
Light Brown Opaque |
| Hardness Shore |
84 D ± 3 |
84 D ± 3 |
84 D ± 3 |
84 D ± 3 |
| Viscosity mixed at 25˚C cps |
300 ± 50 |
300 ± 50 |
300 ± 50 |
300 ± 50 |
| Specific Gravity mixed at 25˚C |
1.13 |
1.13 |
1.13 |
1.13 |
| Shrinkage |
.0005 - .003 |
.001 - .004 |
.002 - .008 |
.003 - .012 |
Demold Time @ 70˚F 1/8" thick
|
6-8 hours
|
1.5-2 hours |
8-20 min.
|
5-12 min.
|
Weight per cubic inch (lbs) |
0.0408 |
0.0408 |
0.0408 |
0.0408 |
Sample Parts
Tuffalloy™-4270
Lawnmower Engine Cover |
Tuffalloy™-4270
Equipment Housing |
Tuffalloy™-4272
Complex Gear |
Tuffalloy™-4275
Interlocking Tubes |
Tuffalloy™-4270
Thin Walled Housing |
Tuffalloy™-4274
Snap-on Component |
|
