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How to check the quality of stretched film?
Source:Mingye Packing Materials Co.,Ltd   Release date:2020-04-28   Hits:857
Today, stretched films are widely used in foreign trade exports. Bottle making, paper making, hardware and electrical appliances, plastics, chemicals, building materials, agricultural products, food and other industries. Stretch film is a single piece or tray packaging and other bundling packaging, stretch film needs to have good transparency in use. When we are inspecting, we can adopt the transparent plastic light transmittance and haze test method. Then how to detect the quality of the stretched film


how to detect the quality of the stretched film


One: peel off the PVC plastic mask of the stretched film and the silicon-coated silicone. The side of the mask coated with glue is kneaded vigorously so that the glue and glue are tightly bonded together. Then pull it away again. Note that the length of the glue thread between the glue and the glue cannot exceed 0.2 mm. In this way, the stretched film has little possibility of degumming during use.

Two: It is also important to check the thickness of the PVC mask. Since it is related to the impact force received by the maintenance film, the thickness of the stretched film is usually about 9 filaments. If deep carving is required, the thickness of the mask should be added accordingly. Otherwise, it will be broken down and damage the processed objects.

Three: Micrometer can be used to detect stretch film. It is not easy to grasp precisely by visual inspection and touch. Since the diameter of a hair is about 7 filaments, it is difficult to imagine that the touch sensitivity is difficult to reach. Some people use a scale to weigh the weight of each roll. In fact, the thickness of the bottom sheet of the maintenance film and the glue are different. Therefore, it is difficult to grasp accurately. The thickness of the 9-wire mask was detected because a layer of glue was applied on the reverse side. So it should be up to 11 filaments, not the total amount of stretched film plus glue 9 filaments.

During the production process of the stretched film, we must pay attention to the control of each process. Therefore, the industrial production efficiency can also be improved very well! You can understand how the quality of the stretched film we mentioned last time is standardized.
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Sha hu kou district,Changping Town,Dongguan,PRC

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