采购须知：
要根据产品不同质量不同材质不同包装效果要求选择不同的热收缩包装膜,
其实热收缩包装膜的选择并不是很繁琐，只要掌握热收缩包装膜的收率要好,厚度适中即可。
热收缩包装膜影响产品热收缩包装的效果的主要因素就是收缩率，收缩率越大越好。
购买热收缩包装机机时，必须选好风机。同时，更要注重热风流通管道系统结构的布局。
当风机工作时，能将上下加热的温度搅送均匀，从而达到理想的效果。

Guidance notes:
Depending on the different quality of the product, different packaging effects are required to select different heat shrinkable packaging films.
In fact, the choice of heat shrinkable packaging film is not very complicated, as long as the recovery of heat shrinkable packaging film is better, the thickness is moderate.
The main factor that affects the effect of heat shrink wrap is the shrinkage rate. The bigger the shrinkage, the better.
When buying a heat shrinkable packaging machine, you must first choose the fan. At the same time, it should pay more attention to the layout of the system structure of the hot air circulation pipeline.
When the fan is working, the temperature of the upper and lower heat can be stirred evenly to achieve the desired effect.