The toughness of PVC heat shrinkable film is very important

The toughness of PVC heat-shrinkable film is very important. Release time: 2019-09-16 PVC heat-shrinkable film is a kind of thermoplastic film that is stretched and oriented during the production process and shrinks by heat during use. The thermal shrinkage of the film has been applied as early as 1936, and rubber film is mainly used to shrink packaging perishable food. Nowadays, heat shrinking technology has been developed to almost use plastic heat shrinkable film to package various commodities. In addition, shrink packaging is also used to make shrink labels and shrink bottle caps, so that containers that are not easy to print or have complex shapes can be labeled. 1. Heating temperature: Affected by the PVC material, the heating temperature will affect the strength of the heat shrinkable film, thereby affecting its quality. Generally speaking, the temperature should be controlled at about 160 degrees Celsius during the actual heating process; if it is too high or Low levels will affect it to varying degrees. 2. Heating time: Under the premise of ensuring temperature and pressure, the longer the time, the stronger the bond between the seals and the better its performance; but if the length of time is not accurate, then wrinkles will appear , Poor flatness and other issues; thereby affecting its overall aesthetics. 3. Pressure control: In order to ensure its good strength, reasonable pressure is also very necessary. Generally speaking, reasonable and uniform pressure helps to reduce the rate of bubble generation, thereby increasing the overall yield rate and reducing the enterprise The required loss; so reasonable pressure is also an important factor affecting the strength of PVC heat shrinkable film. Nowadays, PVC heat shrinkable film covers the packaging field of electronic products, pharmaceutical products and other industries, and it can be said that it has been widely used. However, in production and use, some problems will inevitably affect the use effect. Then, what are the common problems and solutions for the use of PVC heat shrinkable film? The following will be answered by our professionals: 1. Flatulence: Hot air remains in the shrink film. Solution: 1. Increase the number of vent holes to speed up the air leakage from the shrink film. 2. Slow down the conveyor belt speed of the packaging machine, so that the hot air has a longer time to leak from the shrink film. 3. Increasing the temperature of the packaging machine helps air leak from the PVC heat shrinkable film. 2. Atomization: The surface of the shrink film becomes fuzzy, like mist. Solution: 1. Lower the temperature of the packaging machine. Excessive temperature is the cause of the shrink film atomization. 2. Increase the conveyor speed of the packaging machine to reduce the time that the shrink film is exposed to heat. 3. Fisheye: fisheye-like wrinkles appear on the surface of the PVC heat shrinkable film. Solution: 1. The temperature of the shrink packaging machine is too low, you can increase the temperature of the packaging machine. 2. The speed of the conveyor belt of the shrink packaging machine is too fast, so the speed of the conveyor belt can be reduced. 3. The circulating wind force of the shrink packaging machine is too low, so the circulating wind force can be lowered. Previous: Protective performance of pvc shrink film packaging