
There are many different styles of plastic packaging bags, but it can also be
understood as a simplification. A three sided sealing bag is to seal the three
edges of the packaging bag, and load things from the top or bottom sealing,
while a middle sealing bag is to encapsulate the plastic packaging from the
middle. Below, professional flexible packaging manufacturers will provide us
with a specific introduction to the differences between middle sealed bags and
triple sealed bags.
1. Middle sealing bag
The middle sealing bag, also known as the back sealing bag, has a wide range
of applications, and is commonly used for packaging masks, cosmetics, tissues,
toys, food, etc.
The packaging methods for rice, melon seeds, and tea are becoming more and
more diverse. Many food products such as rice, melon seeds, and tea have smaller
packaging bags, and the materials used for packaging bags are also increasing.
Middle sealed bag packaging is one of the common packaging forms.
2. Trilateral sealing bag
The airtightness of the three sided sealing bag is the best, and this bag
making method is generally used for vacuum bags.
Triple sealed bags require vacuum packaging in many situations, and this
reason is also very diverse. Sometimes it may be to prevent food spoilage, and
sometimes it is to extend the shelf life. Vacuum packaging, also known as
pressure reducing packaging, primarily involves extracting all the air from the
packaging bag and sealing it, ensuring that the bag remains in a highly
depressurized state.
Not only that, the use of three sided sealing materials has low loss,
excellent sealing function, high insulation, low oxygen and humidity
permeability, moisture-proof, stain proof, radiation resistant, anti decay,
strong mechanical function, bright and useful appearance, non-toxic, and
odorless, meeting national standards.
The production of intermediate sealing bags and triple sealing bags is
carried out using different equipment. Due to the different production processes
between the two, there may be certain differences in their uses.
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