BOPP film is a very important soft packaging material, widely used. BOPP film colorless, odorless, odorless, non-toxic, and has high tensile strength, impact strength, rigidity, strong toughness and good transparency. BOPP film surface can be low, gelor or printing before the need for corona treatment. However, the BOPP film after corona treatment, has a good printing adaptability, can be color printing and get a beautiful appearance effect, so commonly used as a composite film surface material.
What is BOPP Film?
BOPP film is also inadequate, such as easy accumulation of static electricity, no heat sealing and so on. In the high-speed operation of the production line, BOPP membrane easy to produce static electricity, need to install electrostatic remover. In order to obtain a heat-sealable BOPP film, it can be applied to heat-sealed resin adhesive after BOPP film surface corona treatment, such as PVDC latex, EVA latex, etc., can also be coated with solvent glue, but also by extrusion coating or co-extrusion compound method to produce hot-sealed BOPP film.
BOPP film is widely used in bread, clothing, shoes and socks packaging, as well as cigarettes, books cover packaging. BoPP film cause tear strength after stretching increased, but the secondary tear strength is very low, therefore, the BOPP film at both ends of the face can not leave any incision, otherwise BOPP film in printing, compound ingress easy to tear.
BOPP can produce sealing tape after coating stickers, is a larger use of BOPP market. It can be produced by tube membrane or flat film. The BOPP film properties obtained by different processing methods are also different. The BOPP film produced by flat film method is higher in strength than the tube film method because of its large tensile ratio (up to 8-10), and the uniformity of the film thickness is also better. In order to obtain better comprehensive performance, multi-layer composite method is usually used in the process of use
BOPP can be composited with a variety of different materials to meet special application needs. Such as BOPP can be with LDPE (CPP), PE, PT, PO, PVA and other composite to get a high degree of resistance, moisture resistance, transparent, high, low temperature, steaming and oil resistance, different composite film can be applied to oil-based food, rare food, dry food, impregnated food, a variety of steamed cooked food, MSG, pancakes, cakes and other packaging.