Fermented pork bags can be produced with the following materials:

1.  PP or Polypropylene: The characteristics of this type of bag are that it is clear, hard, crisp, and has high heat resistance, but PP’s weak point is that it’s not cold-resistant.

2.  LLDPE or Linear Low-Density Polyethylene: The characteristics of this type of bag are that it is clear, tough, and cold-resistant. (can withstand cold up to - 20 degrees Celsius) but LL’s weak point is it’s not heat resistant (it can only withstand heat at the maximum of approximately 80 degrees Celsius)

3. OPP or Oriented Polypropylene: The characteristics of this type of bag are that it is clear, crisp, and shiny, and it can be produced as thin as 20 mic/side, but OPP’s weak point is that it can only be produced by the side-sealed process. Therefore, the bag may break more easily than the bags that are produced by sealing the bottom.