Using composite technology of vacuum bags of strengths and weaknesses!
Composite vacuum bag refers to the process through certain will of two or several blocking performance of different film compound together.
So the perpetrators should think of packing inside have to be put through several layers of film, equivalent to prolong the seepage path, so that the blocking performance was improved.
Advantages of this method is a combination of various membrane and preparation of a kind of comprehensive performance of composite membrane, its process is simple.
But compared with the intrinsic type high barrier material, using this method is the preparation of thin films thicker, prone to bubbles or affect the blocking performance problem such as craze fold, and requirements for equipment is relatively complex, high cost.
Composite vacuum bag commonly used in solid and powder on the package.
The contents of the heavier by instantaneous impact (
Fall, for example)
, have higher request for the sealing strength.
From the material structure into consideration, only is to improve the tensile strength and can not solve the problem, the material tear strength seems to be more obviously improve the impact strength.
Plastic bags 】
Aluminum foil bag]