Polymers and elastomers · Banned
Generic adhesives and tapes
Gluevalues describe: generic tape adhesive
Why it's out
Uncharacterized outgassing.
Where it hides
Named exceptions exist: low-outgassing epoxies (Torr Seal class, EPO-TEK vacuum grades) and polyimide (Kapton) tape.
Properties
The values below are candidate: compiled from the sources named, not yet individually validated. Provisional provenance: NASA outgassing database; ECSS space product assurance standards.
Wet cleaning
| Recipe | not applicable |
|---|---|
| Forbidden | the adhesive on ordinary Kapton tape is not the film: check the adhesive, not the backing |
| Limit | no TML or CVCM data means no entry |
Vacuum and outgassing
| Outgassing, unbaked (10 h) | 1e-5 mbar·L/s/cm² |
|---|---|
| Vapour pressure | solvent and monomer for months |
Temperature
| Bake, assembled | 80 at best °C |
|---|---|
| Metallurgical limit | THE CONDEMNING MECHANISM: uncharacterised chemistry, no cure schedule, and silicone-adhesive tapes bring the siloxane problem with them |
Electrical and magnetic
| Relative permeability | 1.0 |
|---|
Engineering
| Availability and cost | in every drawer |
|---|