Dense food grade fresh keeping with seal ziplock household refrigerator plastic seal film zip lock bag

1：Size: The size of food preservation bags varies depending on actual needs. Common sizes include 10cm x 15cm, 15cm x 20cm, 20cm x 25cm, etc. Depending on the size and quantity of food being packaged, the appropriate size can be selected.

2：Material: Food preservation bags are usually made of high-strength, corrosion-resistant, non-toxic, and environmentally friendly materials. Common materials include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc. These materials can effectively prevent the entry of external oxygen and moisture and maintain the freshness of food.

3：Thickness: The thickness of food preservation bags is also one of its specifications. The common thickness range is between 0.05mm and 0.2mm. Thicker bags provide better protection from damage or deterioration during storage.

4：Transparency: Some food preservation bags have high transparency, which allows people to clearly see the freshness and hygiene of the food. Highly transparent plastic bags are usually made of transparent polyethylene or polypropylene.

5：Sealing: The sealing of food preservation bags is one of its important specifications. Good sealing performance can effectively prevent the entry of air and moisture, thereby maintaining the freshness and hygiene of food.

6：Freeze resistance: For food that needs to be frozen, the fresh-keeping bag should have a certain freeze resistance to prevent cracking or deformation during the freezing process.

7：High temperature resistance: For food that requires heating or microwave heating, the fresh-keeping bag should have high temperature resistance to prevent cracking or deformation during the heating process.

8：Labeling: Food preservation bags usually have a labeling function to facilitate labeling and classification of food. Common marking methods include printing, hot stamping, labeling, etc.