English to Russian Tech/Engineering Materials (Plastics, Ceramics, etc.) Клея

[0003] Multi-layer flexible or polymer films are often used in food packaging and other applications such as agriculture, pharmaceutical, and electronic packaging to suggest but a few application. Production of multi-layer films generally necessitates some form of lamination to adhere the multiple layers together. A common approach to forming a multi-layer film, such as a 2-ply or two layer film, is through adhesive lamination, whereby two films of differing film materials are adhesively bonded through tie layers to form a final product. In this approach, the adhesive is first directly applied or deposited to a base layer, which is then brought into contact with a second layer to form a two-ply film. The adhesive is then cured or dried to bond the two layers together. Often, the cured adhesive in this structure tends to be relatively stiff or brittle in the context of a flexible film. By one approach, conventional two-ply flexible packaging films often rely on a two-component adhesive system based on an isocyanate-terminated polyester urethane adhesive that provides a strong bond between a metalized polymer and a polyolefin sealant films commonly used in packaging application. Such adhesives tend to require a lengthy cure time from 3 to 5 days at 70˚F in order to form desired properties.

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