Co-extruded protective film production process

The method through the co-extrusion composite equipment (co-extrusion blow moulding or co-extrusion casting equipment) will be pressure-sensitive adhesive layer and the substrate layer synchronous extrusion, composite, surface protection film, this method is the application of co-extruded production of surface protection film, the main production of high production efficiency, environmental protection to adapt to the surface of the surface of the film is a more ideal method. Good, low-cost production and product quality and other advantages, so it has attracted much attention, is considered to be the future development direction of the surface protection film production process. From the 1970s onwards, foreign countries began to co-extruded protective film patents published. Since then, some of the world's leading companies, such as Sekisui, Nitto Denko, Beiersdorf, etc., have increased the application of the co-extrusion method for the production of surface protection film R & D efforts, published a number of patents, and in the market gradually launched the corresponding products, such as Taiwan Province of China, Crown Poly Industries Co., Ltd. of the surface protection film for PC boards, 3M and the French Novacel co-extruded adhesive film, etc. etc. At present, the country has also adopted the co-extrusion method, the production and supply of PC board surface protection film, Jilin, Shanghai and other places have also carried out the co-extrusion method of production of surface protection film research work, but in general, China's mainland, the use of co-extrusion process to produce the surface protection film manufacturers are not yet common, the production of protective film, the supply of the coated method is also dominated by the production and supply of protective film. Nanjing Suminoe Precision Professional Cast Film Production Line

First, the production process of co-extruded protective film

Production of multilayer composite film co-extrusion process, directly from the granular (or powder) raw materials to produce composite films. Co-extrusion process has a co-extrusion blow moulding method and co-extrusion casting method two categories, they can be used for the production of surface protection film. Nanjing Suminoe Precision's professional cast film production line

Co-extruded surface protection film substrate layer and the thickness of the pressure-sensitive adhesive layer than, generally controlled in the (2 ~ 10):1 range.

1.Co-extrusion blow moulding method

Co-extrusion blow moulding method is suitable for the production of the components of the melt flow rate is low, the surface protection film viscosity is small, when the co-extrusion blow moulding method of production of surface protection film, due to the surface protection film has a pressure-sensitive adhesive layer exists, in the production process must be strengthened cooling, so that the blown film in the stacking of the temperature before the film down to below 50 ℃. Nanjing Suminoe Precision Professional Cast Film Production Line

2.Co-extrusion casting method

The production of surface protection film by casting method has a wider range of application, but the price of production equipment is higher.

Nanjing Suminoe Precision Machinery Co., Ltd. has professional cast film production line, the company's main cast film manufacturing production line: TPU hot melt adhesive film production line, CPP/CPE cast film production line, EVA solar energy encapsulation adhesive film production line, PE sanitary breathable film production line, PVDF cast film production line, PP 3D film production line, medical blood purification film production line, multi-layer co-extruded barrier film production line, LLDPE winding film production line, LLDPE film production line, LLDPE film production line, LLDPE film production line, LLDPE film production line, LLDPE film production line. production line, LLDPE winding film production line and so on.