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Shelf Life Of Uncured Protective Rubber Linings

Commercial-Grade-Rubber-Sheet

In determining the shelf life of uncured rubber linings, several instances but be understood:

  1. The level of heat memory built into a compound (ex. Synthetic Rubber takes more heat to break down than a Natural Rubber)
  2.  The lower the storage temperature, the longer the rubber lining will be useable.

As a rule of thumb the average uncured rubber linings (NR, IIR) will have a shelf life of approximate shelf life of 9 to 12 months if stored at a temperature of 10°C (also out of sunlight).  If the linings are stored at a lower temperature the rubber lining will much longer the 12 month period.  Please note that Neoprene (CR) and Nitrile (NBR) compounds have a typical shorter shelf life than the above mentioned compounds.  In dealing with these compounds a great of caution is to be used as they can cure much faster.  If storing rubber at a lower temperature that the recommended 10°C  the rubber may become frozen, if this was to happen the roll will need to be unrolled and left at an ambient temperature for 2 weeks to thaw the rubber.  After the 2 week interval the rubber will need to go on a hot table to help facilitate any shrink that might of occurred during the freezing process.

Any Questions please contact RubberSource @ 519-830-0546.

Rubebrsource

 

Buck Meadows / Rubber Technologist

Technical Sales Manager

RubberSource

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Bromobutyl Rubber Linings

uncured-bromo-butyl-scrap-rubber-waste-sheets-300x194

Bromobutyl is a derivative of the halobutyl family, which is structurally similar to chlorobutyl rubber and produced through the same halogenation process: Brominated (BIIR) to Chlorinated (CIIR). By using the brominated process allows the same workability in the lining as a chlorobutyl.   The Bromobutyl polymer will exhibit stronger physical characteristics over Chlorobutyl. Bromobutyl Linings are either blended with Natural Rubber for ease of application or made pure in polymer content, which means there is no other polymer in the formulation which gives the lining stronger permeation and heat resistance.

 

Advantages

•    Tight knitting of the molecular cross link which results in an extremely low permeability rate.

•    Low glass transition temperature

•    Wide vulcanization versatility

•    Fast cure rates

•    Higher Heat Resistance

o   Other Bromobutyl linings have a maximum heat resistance to 121°C as to the pure bromo can run at a constant temperature of 127°F and handle spikes up to 150°C

•    Stronger bond strength to substrates

•    Excellent Oxidation / Ozone Resistance

•    Good Abrasion Resistance

 

 

Common uses of Bromobutyl linings are:

– Scrubber Towers

– Piping,

-Storage Vessels

– Chutes

– Thickeners / Clarifiers

 

Any questions on our Bromobutyl linings please feel free to contact

Rubebrsource

Buck Meadows / Rubber Technologist

RubberSource

Ph# (519) 620-4440

Email: buck@rubbersource.ca