Winding film is very common in our daily life. Its application limitations are very wide, and it is involved in various industries, so that friends need winding film more and more. However, friends must pay attention to a few problems when buying winding film. What is very common is about the quality of winding film. I believe friends want winding film with good quality, Because the quality is good and practical, the service life is long, and our price can be saved. How should we test the quality of winding film? Below, Xiaobian will share with friends the skills on testing the quality of winding film, which is expected to be sponsored to friends!!

　　1. Appearance: the surface of the winding film with good quality is gentle, natural and transparent. Put a newspaper 20 cm below the stretching film, which can clearly see the words on the top without affecting reading.

　　The tensile film with poor quality will make the surface look bright and feel rich due to the addition of plasticizer and titanium dioxide, but the clarity is poor, which is very easy to distinguish.

　　2. Stretching: stretching is the ability of elastic elongation of the winding film after tension, and it will not break within the limitations of certain restrictions.

　　3. Self adhesion: self adhesion is affected by many external components, such as humidity, dust and dirt. The self adhesion of a good stretching film is about 1n / C ㎡. Wrap ordinary eggs with stretching film, and then press the thumb size place to lift the eggs. The tensile film with poor quality can not achieve this result.

　　4. Toughness: the dangerous degree value of tear resistance must be horizontal, that is, perpendicular to the mechanical control direction. Tearing in this direction will loosen the package. Even if there is tearing in the longitudinal direction, the package can still be firmly connected. Therefore, the better the toughness of the tensile film means the more advanced the quality.

　　Article from: winding film manufacturer   http://www.weifengsuliao.com