You can cover paperboard with plastics to combine the paperboard’s mechanical properties with the obstacle and sealing properties of plastics. Paperboard joints with a comparatively small number of plastic materials will offer the extra features required to make the paperboard appropriate for several exceptionally demanding applications. Extrusion coating is a process that uses Paper Extrusion Coating Laminating Machine. It applies molten plastic to the paperboard and then chilled to form a weak, smooth layer of even thickness.
However, it uses molten plastic as an adhesive to laminate a plastic film or metal foil. you can use Extrusion coating and lamination to achieve:
- moisture protection
- grease resistance
- heat sealability
- the barrier to oxygen, water vapor, aroma, etc.
- Sales appeal, for instance, shiny surfaces.
Sales appeal: The usage of extrusion coated and laminated paperboard offers outstanding promotional advantages in visual appeal and customer handling. Paper Extrusion Coating Laminating Machine creates high gloss and has a specific high gloss chill roller. Moreover, the coating also delivers a metallic effect by lamination with aluminum foil or metalized plastic film. These materials and processes offer tactile sensations of good quality and luxury, which the customer associates with high-value products packed in these materials.
Examples of extruded and laminated products
- Polyethylene extrusion coating of paperboard with a shine or matt finish. You can do printing and stick with cold glue on a corona-treated surface.
- Polypropylene and polyethylene terephthalate are two heat-resistant polymers applied on the sheet; you can use them in oven applications.
- Aluminum foil and metalized plastic film may be plastic-coated to the paperboard to offer a metallic effect. You can print on a pre-treated surface.
Functional coating: generally, paperboard as such is appropriate for the packaging of dry products.
However, basic paperboard is only appropriate for direct contact with sticky and greasy foods to a limited amount, as moisture affects the paperboard’s mechanical properties, and engrossed grease causes stains. These effects reduce the protective function of the suite and may diminish the appearance. Extrusion coating or lamination machine adds a thin layer of plastic to your paperboard. Plastic coatings can deliver resistance to grease and moisture and, where suitable, be heat resistant. You can heat seal Plastic coatings and can in some constructions these seals leak proof. The paperboard may be extrusion coated on one or two sides, depending on the application. Aluminum lamination offers packages with a block to moisture, light, grease, and gases. You can use plastic coat the aluminum foil to provide product safety and heat sealing abilities.
In the extrusion coating lamination process, the extruder forces melted thermoplastic mastic through a horizontal slot-die onto a substrate’s stirring web. It can coat the resulting product permanently web structure. Extrusion lamination is a similar procedure to extrusion coating, where you extrude the resin between two substrates and like as a bonding agent.
The bonding station nipped inside an extrusion coat laminating line the substrates and melt. It consists of a large roll, a pressure roll, and a counter-pressure roll chilled by water. The pressure combination between the rolls and the temperature allows the delivery of the correct adhesion level.
The closing product is reversed as a permanently attached multi-ply laminated structure. Most plastic films and foils need a primer coating before you use them in the extrusion process.