The base material of the sealing tape is BOPP film. B […]
The base material of the sealing tape is BOPP film.
BOPP is a very important flexible packaging materialTeflon Tape Manufacturers with a wide range of applications. BOPP film is colorless, odorless, odorless, non-toxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. It is a high-quality substrate for transparent sealing tape. 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 be overprinted to obtain exquisite appearance, so it is often used as the surface layer material of composite film. BOPP film also has shortcomings, such as easy accumulation of static electricity and no heat sealability.
On a high-speed production line, BOPP film is prone to static electricity, and static electricity eliminators must be installed. In order to obtain a heat-sealable BOPP film, heat-sealable resin glue, such as PVDC latex, EVA latex, etc., can be coated on the surface of the BOPP film after corona treatment, solvent glue, or extrusion coating or The co-extrusion method produces heat-sealable BOPP film. The film is widely used in the packaging of bread, clothes, footwear, etc., as well as the cover packaging of cigarettes and books. The induced tear strength of the BOPP film is improved after stretching, but the secondary tear strength is very low. Therefore, no cuts should be left on both ends of the BOPP film, otherwise the BOPP film is easy to tear during printing and lamination. After BOPP is coated with self-adhesive, it can produce our commonly used box sealing tape, which is a market with a large amount of BOPP.
BOPP film can be produced by tube film method or flat film method. The properties of BOPP films obtained by different processing methods are different. The BOPP film produced by the flat film method has a higher stretching ratio (up to 8-10), so the strength is higher than that of the tube film method, and the uniformity of the film thickness is also better.
In order to obtain better overall performance, it is usually produced by a multi-layer composite method during use. BOPP can be compounded with many different materials to meet the needs of special applications. For example, BOPP can be compounded with LDPE (CPP), PE, PT, PO, PVA, etc. to obtain high gas barrier, moisture barrier, transparency, high and low temperature resistance, cooking resistance and oil resistance. Different composite films can be applied to oily foods and delicacies. Packaging of food, dried food, immersed food, various steamed and cooked food, MSG, pancake, rice cake, etc.