18mm Screw Thread Headspace Caps with Septa for Manufacturer
Metal caps offer the broadest range of temperature tolerances and are resistant to fracture from impact. Metal caps are great for gas chromatography applications. A metal closure is manufactured from either steel (coated with an anti-corrosive coating of either chrome plate or tinplate) or aluminum.
High-quality, pure silicone is laminated to PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures.
PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.
Septa-silica gel has strong repetitive sealability and can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. Two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on.