Technical Support

ASEPTIC technology

“Aseptic processing and packaging of foods consist of filling sterilized and cooled food into pre- sterilized container, followed by hermetic sealing with a pre-sterilized closure in a pre- sterilized and decontaminated aseptic work zone”

“Contrasted with retorting or in-container sterilization, in aseptic processing the product and the package are independently sterilized by optimal processes, without heat-transfer mode, permitting high-temperature and short time processing also of heat labile products without excessive quality and nutritional degradation”





“In order to obtain the complete asepsis of our bags, we irradiate them using Gamma rays.
The Gamma sterilization process uses Cobalt 60 radiation to kill microorganisms. Processing with gamma irradiation yields quick turnaround time, easily penetrating packaging.
The unit of absorbed dose is KiloGray, expressed as kGy. The absorbed dose is determined by product density, pack size, dose rate, exposure time and to some degree by plant design.”

Cycle time:
-The product arrives on a truck and is unloaded at the processing facility.
-The product is received by lot and product code.
-The product is loaded into the processing container per established configurations, dosimeters are placed, and the product is exposed to the radiation field (Cobalt 60 source rack).
-Dosimeters are analyzed after gamma irradiation of the product is complete, to confirm that the required dose has been delivered
-All documentation and processing history records are reviewed, and if they are acceptable and Customer specifications are met, the product is release.


Irradiation dot detector

HANSIN apply on the label of each carton box a “irradiation dot detector” in order to validate the process. After irradiation the “dot” must turn to RED color.
If not, still YELLOW, it means the box was not irradiated.

PLEASE don’t use the bags if the “dot” is still YELLOW ”



Flex Cracking Resistance

How to prevent FLEXCRACKING?

“In order to prevent flex cracking phenomena we suggest to use a dunnage to fill the “head space” between the top of the filled bag and the lid of the drum. Dunnage can be any material that will compress to fill the space on the top of the filled bag and prevent the wave action of the liquid during transportation. ”

“HANSIN already have a new generation of Aseptic bags with a better flex cracking resistance.
In our R&D dpt we are testing new updated formulations of laminates and films. Because the Flex cracking phenomena depend on many different factors (kind of product, viscosity, different transportation, temperature, etc) we suggest to our customers to run some tests before to decide to avoid to put the dunnage.”




From the test results Hansin inner layer shows better performances than other competitors. Please contact us for the comparison data.




In any case we suggest our customers to block the aseptic bags before shipment in order to have the maximum guarantee NO damage during transport. Especially when the filling product is very liquid.

We always suggest to our customers to block the bags following the efficient method.


New method to block the bags.

The mean…is to use the PE bag that usually all the customers use between the aseptic bag and drum.


How to do:

  1. Use a PE bag with the right length (not too short);
  2. Stretch horizontally the upper part of the aseptic bag and put the two corner between the bag and the drum;
  3. The surface has to be as much flat is possible;
  4. Collect the PE bagupper part in order to form a topknot and twist;
  5. Twist as much as possible since you see the outer part (close to the drum ) became “round”;
  6. Fix the PE bag with a “plastic strip”;