With the continuous improvement of the economic level, our consumption level has also increased, so many products used in daily life will be refined packaging, and PE protective film will be used more and more, because the use of commodity packaging can improve the added value of goods in people's minds, generally have beautiful cartons, wooden boxes or metal and other materials for packaging, As a flexible packaging material, PE protective film is also a very convenient packaging material in the packaging industry. But many times in order to protect the product in the transportation or handling process will not suffer from pollution, the use of PE protective film on the product leads to degumming, what is the reason, so Okawa Shun summarized several reasons:

     1. The time change of peel strength: In the product itself, although it looks very smooth to the naked eye, there are still fine holes distributed, and the pressure sensitive adhesive also has fluidity, especially in the polymer part that has not been cross-linked. Therefore, with the continuous increase of time, although a lot of force is used to press the product when it is affixed, some small holes are still not in contact with the PE protective film, and the pressure sensitive adhesive will gradually penetrate into the small hole on the surface of the product after a long time, so sometimes when the PE protective film is torn off, there will be glue falling off the surface of the protected product.

      2. Similarity compatibility mechanism

    Because acrylic pressure sensitive adhesive is a material with relatively large polarity, it is easy to be compatible with polyester and polyurethane and other materials, so it is difficult to remove PE protective film, if there is a large force between the surface of the protected product and these small molecules, then PE protective film is easy to residual glue on the protected surface when it is lifted.