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What is A Co-Extrusion Blow Film Machine?
The co-extrusion blow film machine is machinery that combines a co-extrusion process with a blow film process, and can therefore be called a blown film extrusion plants or co-extrusion film blowing line.
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags.
The co-extrusion process is defined as the process of extruding two or more plastic materials through a single mold. Two or more holes are arranged in this process to combine and weld the extrudates and form a layered structure prior to cooling. In co-extrusion, a separate extruder is used to feed each material into the mold, but the orifices are arranged in such a way that each extruder provides two or more layers of the same material.
Co-extrusion can be used in the blown film process, extrusion coating and free film extrusion. Multi-layer film properties: an extremely thin resin layer that cannot be formed by the film itself can be formed by co-extrusion. In this way, a variety of functions can be combined in a single film, such as heat resistance, heat sealing ability, stiffness, flexibility, cold resistance, and easy peel ability.
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags.
The co-extrusion process is defined as the process of extruding two or more plastic materials through a single mold. Two or more holes are arranged in this process to combine and weld the extrudates and form a layered structure prior to cooling. In co-extrusion, a separate extruder is used to feed each material into the mold, but the orifices are arranged in such a way that each extruder provides two or more layers of the same material.
Co-extrusion can be used in the blown film process, extrusion coating and free film extrusion. Multi-layer film properties: an extremely thin resin layer that cannot be formed by the film itself can be formed by co-extrusion. In this way, a variety of functions can be combined in a single film, such as heat resistance, heat sealing ability, stiffness, flexibility, cold resistance, and easy peel ability.
Advantages of Co-Extrusion:
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The Disadvantages of Co-Extrusion:
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Reference:industrialextrusionmachinery / matilataiwan
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