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Flexible Packaging Adhesives are mainly applied by roll coating.
The coating unit of dry laminator and extrusion machine are same, both of them use gravure cylinder and rubber pressing roll. The lines and depth of sell on coating cylinder will affect the solvent based laminating adhesive's dry coating weight. The coating cylinder is not heated.
The coating unit of solvent less laminator is composed by 5 rollers: 3 steel rolls plus 2 rubber rolls. The steel rolls are heated. The final coating weight of the solvent free polyurethane adhesive is affected by the speed difference between transferring roll and coating roll.
The shelf life of Flexible Packaging Adhesives can vary depending on the specific product and storage conditions, but typically ranges from 6 months to a year.
While these lamination adhesives for flexible packaging are designed to work with a wide range of materials, it's important to choose the right type of adhesive for the specific material to ensure optimal adhesion.
Choosing the right laminating adhesives for flexible packaging lamination depends on several factors, including the type of materials being bonded, the conditions the package will be exposed to, and any specific regulatory requirements.
Most polyurethane bonding adhesives including water based adhesive for flexible packaging should be stored in a cool, dry place away from direct sunlight. Always refer to the product's specific storage instructions.
While these PU lamination adhesives are designed for packaging applications, some may also be suitable for other uses. Always check the product's specifications and consult with the industrial laminating adhesive manufacturers if unsure.
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