Airtech 1050 & 4140 are high grade silicone rubbers that offer high reversion resistance and strength. They provide superior performance for manufacture of rubber tooling such as bladders, pressure intensifiers, and vacuum bags. The physical properties of Airtech 4140 are comparable to Airtech 1050 when fully cured and post cured according to the instructions below.
• Cured silicone rubber caul sheets can improve part quality on the bag side of the moulded parts.
• Avoid cure shrinkage problems by using cured silicone bonded with uncured material.
• Can be used over complex surface to produce smooth finish.
| Properties listed are typical for the fully cured material |
| Airtech 1050 | Airtech 4140 | Test method |
| Material type | Cured silicone rubber | Uncured silicone rubber | |
| Colour | Red | Red | |
| Hardness | 50+/-5 Shore A | 50+/-5 Shore A | ASTM D2240 |
| Maximum use temperature | 232°C (450°F) | 232°C (450°F) | |
| Elongation at break | 700 % | 700 % | ASTM D412 die A |
| Tensile strength | 9.65 MPa (1400 psi) | 9.65 MPa (1400 psi) | ASTM D412 die A |
| Compression set at 22 hrs. at 177°C (350°F) | 28 % | - | ASTM D395, |
| Shelf life | Unlimited when stored
in original packaging
at 22°C (72°F) | 6 months when stored below 4°C (40°F). 30 days when stored below 22°C (72°F) from date of shipment when stored in original packaging | |
| Airtech 1050 | Airtech 4140 |
|---|
1.02 mm x 1.22 m +/- 0.64 cm x 22.9 m (0.040” x 48” +/- 0.25” x 25 yards) 1 roll | 1.02 mm x 91.4 cm x 22.9 m (0.040” x 36” x 25 yards) 1 roll |
1.52 mm x 1.22 m +/- 0.64 cm x 22.9 m (0.060” x 48” +/- 0.25” x 25 yards) 1 roll | 1.52 mm x 91.4 cm x 22.9 m (0.060” x 36” x 25 yards) 1 roll |
Cure Instructions for Airtech 4140
• Apply Release Ease® 234 TFP over uncured Airtech 4140.
• Cover with A4000 or Wrightlon® 5200 and Airweave® N7.
• Bag with Ipplon® KM1300 or equivalent.
• Apply full vacuum, ramp to 177°C (350°F) and hold for 30 minutes, based on lagging thermocouple
placed on tool.
• Allow to cool to 49°C (120°F) before removal from tool.
• For lower temperature cures, simply increase the cure time 30 minutes per 10°C (50°F) drop in
temperature from 177°C (350°F).
• Minimum cure temperature is 121°C (250°F).
• Shorter rolls of Airtech 4140 available on special order.
• Any silicone rubber has the potential to transfer. Silicone transfer investigation should be done by the user.
• The maximum use temperature is dependent upon the duration at maximum temperature and is process
specific, Airtech recommends testing prior to use.
Last updated : 2024-08-14
As the conditions or methods of use, including storage, are beyond our control, Airtech International, Inc. does not assume responsibility for the performance of this material for any particular use. The material is sold "as is". Airtech International, Inc. disclaims, and buyer waives, any and all implied warranties, including without limitation the implied warranties of merchantability and of fitness for particular use. The information contained herein represents typical properties and should not be used for specification purposes. Any translation is provided for your convenience only. The official language is English and the official law is California, USA.
