BOPP film material

BOPP film is one of the indispensable packaging materials in our daily life, that is, biaxially oriented polypropylene film. This film plays an important role in the packaging field, and its performance directly affects the quality and appearance of the various packages we use. Beichuan Chain Master will briefly introduce this material to everyone.

First, let us understand the electrostatic properties of BOPP film. During the packaging process, the film will be charged with static electricity due to friction, which may cause adhesion problems and affect the normal operation of the packaging machine. To solve this problem, antistatic agents can be used. But this also brings new challenges. How to reduce static electricity without affecting the optical properties of the film has become the focus of research.

Another property of concern is friction performance. Imagine how the items in the store are packed in cartons when we shop. At this time, the BOPP film rubs against the paper, and controlling the friction coefficient is crucial to the positioning and folding quality of the package. By adjusting the slip agents, anti-adhesive agents and other substances added to the surface of the film, scientists strive to improve the quality of packaging while maintaining friction properties.

In packaging machines, heat sealing is a critical step. The heat sealing performance of BOPP film, including heat sealing temperature and heat sealing strength, is directly related to the firmness of the packaging. In order to adapt to different packaging machines and environments, researchers work hard to broaden the range of heat sealing temperatures to ensure that the film can perform well under various conditions.

Did you know that some of the packaging films we see shrink slightly when exposed to heat? This is where thermal shrinkage comes into play. Scientists add some special substances to the film, adjust the stretching process and setting temperature, so that the film has an adjustable heat shrinkage rate to meet the needs of different packaging.

Of course, the first thing we see when shopping is the appearance of the packaging. High gloss and low haze are two important indicators of the optical performance of BOPP films. Glossiness directly affects the visual effect of packaging, while low haze keeps packaging contents clearly visible. This prompts scientists to continuously pursue high gloss and high transparency to make packaging more attractive. Stiffness and abrasion resistance are also one of the key properties of BOPP film. Increased stiffness aids in packaging molding and heat sealing, while improved abrasion resistance makes the film more durable during use.

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