3-layer co-extrusion for vacuum packages

Certainly! 3-layer co-extrusion is commonly used in the production of vacuum packages. Vacuum packaging is a technique employed to extend the shelf life of various perishable products by removing air from the package and creating a vacuum-sealed environment. In a 3-layer co-extrusion for vacuum packages, the layers are designed to provide specific functionalities and properties. Here's a typical configuration:

1. Barrier Layer: The barrier layer is the most critical component in a vacuum package as it provides a barrier against oxygen and moisture, which can deteriorate the quality and freshness of the packaged product. Common materials used for the barrier layer include ethylene vinyl alcohol (EVOH) or polyvinylidene chloride (PVDC). These materials have excellent gas and moisture barrier properties, preventing the entry of oxygen or moisture into the package.
2. Sealant Layer: The sealant layer is responsible for creating an airtight seal when the package is vacuum-sealed. It should have good heat-sealing properties to ensure an effective seal. Common materials used for the sealant layer include polyethylene (PE) or polypropylene (PP). These materials provide excellent heat-sealing characteristics and enable the package to be securely sealed.
3. Outer Layer: The outer layer provides mechanical strength, durability, and protection to the package. It is typically made of materials such as polyethylene (PE) or polypropylene (PP). This layer helps protect the barrier and sealant layers from external factors such as physical damage, puncture, or abrasion.

The 3-layer co-extrusion process allows the simultaneous extrusion of these layers through a single die, resulting in a continuous multilayer film or sheet. This film can then be used to create vacuum packages through a thermoforming or form-fill-seal process. Benefits of using 3-layer co-extrusion for vacuum packages include:

1. Enhanced product protection: The barrier layer effectively prevents oxygen and moisture ingress, preserving the quality, flavor, and freshness of the packaged product.
2. Extended shelf life: By creating a vacuum-sealed environment, the package helps to slow down the growth of spoilage microorganisms, thereby extending the shelf life of perishable products.
3. Physical protection: The outer layer provides mechanical strength and protection to the package, reducing the risk of damage during handling, transportation, and storage.
4. Customization: The choice of materials and their specific properties can be tailored to meet the requirements of different products, ensuring optimal barrier properties and seal integrity.

Thickness range 150 bis 850 μ* (tolerance +/- 5%)

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