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Extruded film made of PTFE (polytetrafluoroethylene) to keep an anti-friction and easy release surface, with a silicone adhesive.
For use in composite moulds as a release barrier in autoclave operations.
Tape 5490 is applied directly to moulds and is removed after the curing process as needed.
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| PTFE offers a low surface energy film that has no affinity for the epoxy prepreg chemistries and acts as a release film while offering a very high degree of conformability. |
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| This is an important characteristic, because most moulds are not flat and the film must conform to the mould. |
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| Tape 5490 is applied to the tool for its release properties, there where it is inconvenient to apply release coating. |
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| The extruded backing gives the Teflon properties which allow it to be applied on flat surfaces and remain flat during the tapeˇ¦s useful life. |
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| Type |
Description |
| Colour |
Blue-black |
| Backing |
Extruded PTFE (Teflon) |
| Adhesive |
Silicone |
| Total thickness |
0.09 mm (3.5 mils) |
| Peel adhesion to steel |
29 N/100 mm (27 oz./in. width) |
| Tensile strength |
385 N/100 mm (22 lbs./in. width) |
| Elongation at break |
150% |
| Operational temperature range |
-73°C to +204°C (-100°F to +400°F) |
| Intermittent |
260°C (500°F) |
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