Knowledge introduction of the hottest BOPP plastic

BOPP plastic film is a very important flexible packaging material, which is widely used. BOPP film is colorless, odorless, tasteless, non-toxic, and has high tensile strength, impact strength, rigidity, strong toughness and good transparency. The surface energy of BOPP film is low, and corona treatment is required before gluing or printing. However, after corona treatment, BOPP film has good printing adaptability, and can get beautiful appearance effect by chromatic printing, so it is often used as the surface material of composite film. BOPP film also has shortcomings, such as easy to accumulate static electricity, no heat sealing, etc. In the production line with high-speed operation, BOPP film is prone to generate static electricity, so it is necessary to install static electricity removal and grinding machine. The protection is mainly divided into three levels: normal protection, and protection and two-level protector. In order to obtain heat sealable BOPP film, heat sealable resin glue liquid, such as PVDC latex, EVA latex, etc., can be coated on the surface of BOPP film after corona treatment, solvent glue can also be coated, and heat sealable BOPP film can also be produced by extrusion coating or coextrusion composite method. The film is widely used in the packaging of bread, clothes, shoes and socks, as well as the cover packaging of cigarettes and books. The induced tear strength of BOPP film is increased after stretching, but the secondary tear strength is very low. Therefore, no incision can be left on both sides of BOPP film, otherwise the BOPP film is easy to tear during printing and compounding. After BOPP is coated with self-adhesive, it can produce sealing tape, which is a market with a large amount of BOPP

bop pressure velocity 1.2mm/minp film can be produced by tube film method or flat film method. The properties of BOPP films obtained by different processing methods are also different. The BOPP film produced by the flat film method has higher strength and better uniformity of film thickness than that produced by the tube film method because of its large tensile ratio (up to)

in order to obtain better comprehensive performance, biodegradable substitutes are usually produced by multi-layer composite method in the process of use. BOPP can be compounded with a variety of different materials to meet the development trend of "plastic instead of steel" and "plastic instead of wood", which provides a broad market space for the development of the plastic industry and special application needs. For example, BOPP can be compounded with LDPE (CPP), PE, Pt, Po, PVA, etc. to obtain high gas resistance, moisture resistance, transparency, high and low temperature resistance, cooking resistance and oil resistance. Different composite films can be applied to the packaging of oily food, delicacies, dry food, impregnated food, all kinds of cooked food, monosodium glutamate, pancakes, rice cakes and so on