3-layer co-extrusion for laminated films

Certainly! 3-layer co-extrusion is commonly used in the production of laminated films. Laminated films are multilayer structures that combine different materials to achieve specific properties and performance characteristics. In the context of laminated films, the three layers in a 3-layer co-extrusion are typically composed of different materials, each serving a specific purpose. Here's a typical configuration:

1. Outer Layer: The outer layer is often made of a material that provides strength, durability, and resistance to external factors such as moisture, abrasion, or UV light. Common materials used for the outer layer include polyethylene (PE), polypropylene (PP), or polyester (PET).
2. Middle Layer: The middle layer, also known as the barrier layer, is responsible for providing barrier properties such as oxygen, moisture, or aroma barrier. Materials used for the barrier layer may include ethylene vinyl alcohol (EVOH), polyvinylidene chloride (PVDC), or metallized films.
3. Inner Layer: The inner layer is in direct contact with the product being packaged and is selected based on its compatibility with the product and its ability to provide features such as heat sealability or product protection. Common materials used for the inner layer include low-density polyethylene (LDPE) or sealant films.

The specific combination of materials and their thicknesses can be customized based on the requirements of the final product. For example, in food packaging applications, the choice of materials in the laminated film can be tailored to provide excellent oxygen and moisture barrier properties, thereby extending the shelf life of the packaged food. The 3-layer co-extrusion process allows the simultaneous extrusion of these different layers through a single die, resulting in a continuous multilayer film. This film can then be further processed, such as through printing, slitting, and converting, to create finished laminated films suitable for various applications, including food packaging, pharmaceuticals, personal care products, and industrial applications. Overall, 3-layer co-extrusion for laminated films offers a versatile and efficient manufacturing process, allowing for the combination of different materials to achieve the desired properties and performance characteristics required for specific applications.

3-layer co-extrusion

Thickness range 180 up to 500 μ* (tolerance +/- 5%)

Widths 200 up to 1350 mm* (tolerance +/- 1 mm)

180 up to 500 μ* (tolerance +/- 5%)