Why Extruders Need Co-Extrusion
2024-09
Extruders need to be co-extruded mainly because co-extrusion technology can produce multi-layer composite products with multiple functions and characteristics, which have a wide range of applications in many fields. Co-extrusion technology by using several extruders to supply different melt streams, in a composite head combined co-extrusion to obtain multi-layer composite products, which makes the multi-layer with different characteristics of the material in the extrusion process composite together, so as to obtain the special requirements of performance and appearance. For example, products can be produced by co-extrusion technology with barrier capabilities against oxygen and moisture, colorability, thermal insulation, thermoforming and thermal bonding capabilities, and mechanical properties such as strength, stiffness, and hardness. In addition, co-extrusion technology can greatly reduce the cost of products, simplify the process, reduce equipment investment, and the whole process does not use solvents, do not produce three waste materials, so it is widely used in the production of composite films, plates and so on.
The design and application of the co-extrusion machine also involves the requirements of technical indexes for co-extrusion products with different functions. For example, it is necessary to ensure that the two materials have a long enough bonding time in the head during soft and hard co-extrusion, the balance between the old material flow and the main flow material flow should be considered during co-extrusion of new and old materials, and the color co-extrusion layer should be thin and uniform during two-color co-extrusion. These technical requirements ensure that the co-extruders can produce products with complex multilayer structures that meet the needs of specific applications.
In summary, the extruder uses co-extrusion technology to produce multi-layer composite products with specific functions and properties. These products are widely used in many industries. At the same time, co-extrusion technology can also reduce production costs and improve production. Efficiency, so co-extrusion technology occupies an important position in modern industrial production.
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