Hot filling and cold filling
Some new customers asked the difference between beverage hot filling bottle and cold filling bottle recently, the answer may be found from the introduction of the two different filling technologies below:
Hot filling |
Cold filling |
|
Bottle and quality Requirements |
Crystallized hot filling PET bottle is required. (be able to bear 85℃-90℃ bottle no deform) and heat resisting cap |
Ordinary PET bottle (max. 60℃ ) and standard cap |
Beverage material Requirements |
Be able to keep a long period and need to add preservatives |
Beverage material need to be UHT sterilization, then cool down to normal temperature |
PET bottle sterilization |
To rinsing with ozone water or Chlorine water |
To be immersed in disinfectant or spray sterilization |
Bottle cap sterilization |
To use UV light or Chlorine water |
To be immersed in disinfectant or spray sterilization |
Filling workshop |
Level 100,000 purification |
Level 1,000,000 purification filling zone, preparing workshop 10,000 level, almost no microorganism |
Filling equipment |
Filling system with outer recycle, with CIP |
Non-contacting filling, with complete CIP and SIP system, strict requirements for filling zone of packing material transferring |
After filling |
Bottle turn-over conveyor line and spray cooling equipment is needed. |
No after filling treatment |
Actual Operation |
Technology surrounding operation simple, QC not too strict |
Technology surrounding operation comprehensive, QC extremely strict |
Operation risk |
Small |
Big |
Influence to product taste |
A certain influence |
Tiny influence |
From above table, we can get to know the 2 filling styles have different requirements to the PET bottle. Hot filling bottle has features as below:
More thickness, need high crystallization to enhance heat stability, high stretching rate to make bottle hard, bottle design with strong ribs to prevent from shrinking, bottle neck need to be crystallized.
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