What is the production process of PE film?

PE film, as one of the most important packaging materials, plays a great role in both outer and inner packaging of goods. Outsourcing is used as protection and cover. The inner package can be used as carrier cover, and it has different applications in different fields. It can be said that PE membrane is one of flexible, portable and widely applicable materials in various fields. PE membranes usually made by blow moulding are more advantageous. Here's why PE membranes made by blow moulding are more advantageous.

PE film, i.e. polyethylene film, refers to the film produced by PE particles. PE film has moisture resistance and low moisture permeability. Polyethylene film (PE) can be manufactured with different properties such as low density, medium density, high density polyethylene and cross-linked polyethylene depending on the manufacturing method and control method.

The principle of film blowing is to enter the plastic extruder through the dryer bucket, in which PE film blowing machine fuses into melts, which are fixed temperature and fixed quantity under pressure. The constant pressure is extruded head, where the melt forms a cylindrical shape and is introduced into the fixture of the frame. Thus a closed membrane embryo body is formed, compressed air enters the inner membrane, and the membrane embryo becomes a membrane vesicle. The towing roll rolls continuously to the guide roll and coiling device, and is cut into coils for storage, finally becoming a PE film of high quality finished products.

It is roughly divided into 4 parts: extruder, die head, cooling air ring device. Each part plays its own role; The extruder is responsible for melting and plasticizing the plastic granular resins, and then extrusion, poor plasticization and other product problems can be traced broadly to extruder problems; The internal part of the head is a spiral body, which is responsible for the cross-mixing of plastics. It directly affects the tensile force and strength of the finished film. The die head controls the blowing ratio of the membrane and has a direct influence on the strength and stability of the membrane. The cooling air ring device is responsible for cooling the film bubbles, which directly affects the strength of the finished PE film and is a direct factor affecting the stability and glossiness.

Film blowing technology can well melt and extrude different types, different functions, different types of plastic raw materials and various characteristic materials (such as air permeability, water resistance, heat insulation, toughness, etc.) together to form a multi-functional plastic PE film. The purpose is to exert the advantages of various materials and avoid some disadvantages of single material or single layer film blower. Is an efficient and quality and quantity of mainstream production mode!

Film blower is a mechanical device which heates and melts PE plastic particles and then blows them into thin films. First, dry polyethylene particles are added into the hopper, and they enter the screw from the hopper by the weight of the particles themselves. When the particles come into contact with the oblique edge of the thread, the rotating oblique edge produces a thrust perpendicular to the oblique edge of the plastic, pushing the plastic particles forward. During the pushing process, due to friction between the plastic and the screw, between the plastic and the barrel, and collision and friction between the particles. At the same time, it gradually melts due to heating outside the barrel. The molten plastic is removed from the die opening by the filter screen of the machine head, blown out, cooled by the air ring and pressed by the herringbone plate. The finished film is rolled into a drum by the towing roll coiling.