60 It Is A Suitable Rubber Stopper For Freeze Dried Powder The 2 Leg Rubber Stopper Is in Stock

 

It is a suitable rubber stopper for freeze-dried powder.

 

The 2-leg rubber stopper is in stock.

 

Ordinary butyl rubber

 

-40℃ ~ 100℃

The elasticity decreases quickly at high temperatures,

it is easy to harden or soften,

and the sealing performance is significantly reduced.

 

Bromobutyl rubber

 

-40℃ ~ 120℃

The heat resistance is better than ordinary butyl rubber,

but long-term high temperature can easily release sulfide or low molecular substances.

 

Chlorinated butyl rubber

 

-40℃ ~ 130℃

The heat resistance is slightly higher than that of bromobutyl rubber,

but contact with strong oxidizing solvents needs to be avoided.