Packaging Materials

M/S, SunPro™ Group offers superior extrusion lamination products for different packaging and lamination requirements. Packaging extrusion lamination is a converting process by the combination of two substrates using a molten polymer. In this process, the extrudate enters the nip, which is formed by two rolls. Two substrates also enter the nip by traveling over each roll. The extrudate is therefore the central part of a sandwich material. The factors –flow, substrate non-uniformity, and specific adhesion control the bonding of the three materials in the resulting sandwich composite.

The structure of the high-temperature resistant cooking bag has two layers, three layers, four layers, and even more.

Among them, the second layer is a transparent plastic/mold, such as PET / CPP or OPA / CPP.

The three layers are transparent plastic/mold, such as PET / OPA / CPP, and opaque types containing aluminum foil, such as PET / AL / CPP, OPP / AL / CPP.

The four layers are opaque PET / AL / OPA / CPP with aluminum foil. This structure is a puncture-resistant, reinforced, large-capacity packaging bag. The OPA should be reasonable between AL and CPP.

The more layers are mainly The inner layer does not use pure CPP film, but uses multi-layer co-extruded film, such as PA / EVOH / PP, PA / PVA / PP co-extruded film plus PET or aluminum foil to form a composite with more layers, but its quantity Not much.