What is the difference between cold filling and hot filling?

When a customer consults our pre-sales customer service equipment, many times we will ask, is your filling process cold filling or hot filling? So how does hot filling and cold filling come from? What purpose?

In fact, hot filling and cold filling are a filling process in a manufacturing process. This filling method determines whether the equipment uses aseptic cold filling or aseptic hot filling. Aseptic packaging technology was born in the 1930s. In 1961, Tetra Pak first used Tetra Pak aseptic packaging technology for commercial production. Now the PET aseptic cold filling production line also uses aseptic space plus chemistry. The method of disinfectant is used for sterilization to ensure that the entire filling process meets the sterility requirements.

Aseptic cold filling refers to the cold (normal temperature) filling of beverage products under aseptic conditions, which is compared to the high-temperature hot filling method that is usually used under general conditions. When filling under aseptic conditions, the parts of the equipment that may cause microbial contamination of the beverage are kept aseptic, so there is no need to add preservatives in the beverage, and it is not necessary to perform post-sterilization after the beverage is filled and sealed. Long shelf life is required, while maintaining the taste, color and flavor of the beverage.

The key to aseptic cold filling technology is to ensure that the microorganisms in the beverage after filling and sealing are controlled within the allowable range (that is, commercial aseptic). In order to ensure the success of aseptic cold filling, the production line must meet the following basic requirements:

The product reaches a sterile state after a temperature instant sterilization

Packaging materials and sealed containers should be sterile;

The filling equipment reaches a sterile state;

Filling and capping should be carried out in a sterile environment.