Lamination in Converting Industry
Source:LPC Date:11/25/2010

Laminating Process

Dry Lamination, Wet Lamination, Extrused Lamination, Wax Lamination.

Laminating processes can be classified according to the type of bonding agent used to produce the laminates:
In wet lamination the bonding agent is still in a liquid state when the webs are joined together. Substrate is still in wet and laminate with another substrate. It is commonly used to produce a paper-aluminium foil laminate that is widely used in flexible packaging

In dry lamination, the bonding agent, dissolved into a solvent, is applied on to the less porous and more heatsealable substrate, before being evaporated in the drying oven. Then the adhesive coated substrate is laminated to the other substrate under a strong pressure by means of heated rollers to improve the bond strength of the laminate. Dry lamination is the most popular used in nowadays converting industry.

In wax lamination the bonding agent, wax or hot melt, is applied in a molten state onto one of the two substrates. This process enables to produce paper-paper or paper-aluminium foil laminates that are widely used for packaging biscuits and bakery products in general

Solventless lamination is a process where the adhesives used do not contain solvents.

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