mingye packing

  joypack is a professional   stretch film manufacturer , providing high-quality stretch film products and competitive prices. Nowadays, many companies do not know how to judge whether the viscosity of the stretch film is sufficient when they buy stretch films. Today joypack will introduce you to the method of judging the viscosity of the stretch film. 1. The influence of molecular weight on the viscosity of stretched film: the molecular weight is different, the adhesion performance will be different, the film with high molecular weight has higher adhesion, but as the molecular weight of PIB increases, the adhesion will decrease; If it is low, the viscosity retention time is too short due to its relatively easy volatilization. Therefore, selecting PIB with appropriate molecular weight can make the stretched film have a better viscosity. Studies have shown that PIB with a number average molecular weight of about 1300 is more suitable for increasing the self-adhesiveness of stre...

  The main raw material of   PP strapping roll   is polypropylene, and it is a kind of net-like packaging material after heating, lubricating and stretching and cooling it. However, in this manufacturing process, there are some factors that will have a greater impact on the quality of the entire package, such as length, elongation, tension, bending, etc. If the tension is equal to the parameters, the longer the cost, the lower the cost.  PP strapping roll  is a kind of plastic product with relatively light weight. If it is made as a strapping belt, its use range will be more extensive. In appearance, the main color of PP strapping belt is translucent or opaque. It belongs to the film category and can burn directly in the flame. When the  PP strapping roll  leaves the flame, it will slowly and gradually extinguish or continue to burn. During the combustion process, the upper part of the flame is mainly yellow, and the lower part is mainly blue, and ther...