Home >> News

The Toughness of PVC Heat Shrinkable Film is very Important

Feb. 12, 2020

The toughness of PVC heat-shrinkable film is very important. The quality of PVC heat-shrinkable film is mainly reflected in toughness. Generally, the quality of the shrinkable film cannot be seen with the eyes. It looks the same, or the colors are different. So what factors can affect the performance of PVC heat shrinkable film? Let's take a look with the Multi-purpose Shrink Film Manufacturer.


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, in the actual heating process, the temperature should be controlled at about 160 degrees Celsius; 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 seal will be, and the better its performance; but if the time is not accurately grasped, wrinkles will appear , Poor flatness, etc .; thus affecting its overall aesthetics.

3. Pressure control: In order to ensure its good strength, reasonable pressure is also necessary. Generally speaking, reasonable and uniform pressure helps to reduce the rate of bubble generation, thereby improving the overall yield and reducing the company's Required loss; so reasonable pressure is also an important factor affecting the strength of PVC heat shrinkable film.


Nowadays, PVC Heat Shrink Film covers the packaging field of electronics, pharmaceutical products and other industries, and it can be said that it is widely used. However, there are some problems that will inevitably be encountered in production and use. Then, what are the common problems and solutions for the use of PVC heat shrinkable films? The following will be answered by our professionals:

 PVC Heat Shrink Film

PVC Heat Shrink Film

First, flatulence: hot air remains in the shrink film. Solution: 1. Increase the number of ventilation holes to speed up the leakage of air from the shrink film. 2. Slow down the speed of the conveyor belt of the packaging machine, so that hot air leaks out of the shrink film for a long time. 3. Increase the temperature of the packaging machine to help air leak out of the PVC heat shrinkable film.

2. Atomization: The surface of the shrink film becomes blurred, like mist. Solution: 1. Lower the temperature of the packaging machine. Excessive temperature is the cause of atomization of the shrink film. 2. Increase the speed of the conveyor belt of the packaging machine to reduce the contact time of the shrink film.


By using PVC heat shrinkable film as a decorative film, people can use a large number of medium-density boards, particleboard, plywood and fiberboard, reduce the use of wood, and thus reduce damage to the forest and even the environment. From this perspective, PVC heat shrinkable film has made great contributions to the protection of the ecological environment.


The melting temperature of PVC during processing is a very important process parameter. If this parameter is improper, it will cause the problem of material decomposition. The flow characteristics of PVC are quite poor, and its process range is very narrow. In particular, large molecular weight PVC materials are difficult to process (this material usually requires a lubricant to improve the flow characteristics), so usually small molecular weight PVC materials are used.

PVC materials are often added with stabilizers, lubricants, auxiliary processing agents, colorants, impact agents and other additives in actual use. By using different resins and formulas, heat-shrinkable films with different mechanical strength and functions can be produced, which can be used for inner packaging with lower strength and smaller product weight, as well as mechanical products for containers that require higher strength. Transport packaging (outer packaging) for materials, etc. PVC Shrink Films are made by mixing PVC resin with more than a dozen kinds of auxiliary materials and then inflating them twice. It is characterized by good transparency, easy shrinkage, high strength, and shrinkage rate can be freely adjusted according to user needs.