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What Is the Physical Principle of Polyolefin Shrink Film Cold Setting?

Oct. 27, 2017

Polyolefin Shrink Film has its unique advantages in packaging, it used in polymer molecular chain stretching orientation principle design method to quench type molding, what is the physical principle?

In the Polyolefin Film production, when the polymer in high elastic state, the tensile orientation, then the following polymer quenched to glass transition temperature, molecular orientation is frozen, when the goods in the packaging process of the heating, the stress relaxation due to thermal motion of molecules, molecules that restore the original state, shrinkage. This property makes the heat shrinkable film smoothly connect with beverage bottles of various shapes, and ensures smooth and wrinkle free. Therefore, it is important to test and control the shrinkage property of shrinkable film, to ensure the application effect of shrink film is excellent.

Polyolefin Shrink Film