Koekstrusiooni

Koekstrusiooni, often referred to as coextrusion, is a manufacturing process where two or more distinct materials are extruded simultaneously through a single die. This results in a single, integrated product with multiple layers or components. The materials are melted separately and then combined within the extrusion die just before they are shaped and cooled. Each material maintains its distinct properties within the final product, offering advantages not achievable with single-material extrusion.

This technique is widely used in various industries, particularly for packaging applications. For example, in food packaging, coextrusion can create multi-layer films that provide enhanced barrier properties against oxygen, moisture, or light, thereby extending the shelf life of the product. Different polymers can be combined to achieve specific characteristics like strength, flexibility, heat resistance, or printability on the outer surface, while a core layer might offer superior barrier performance.

Beyond packaging, coextrusion finds application in the production of items like pipes and hoses, where different layers might provide structural integrity, chemical resistance, or a smooth internal surface. It is also utilized in the manufacturing of window profiles, automotive parts, and medical devices. The precise control over layer thickness and material selection allows for the creation of complex composite structures with tailored performance profiles, making coextrusion a versatile and efficient manufacturing method.