| 摘要 |
food industry; packing of dry and liquid milk products. SUBSTANCE: invention relates to packing materials designed for packing of different products with provision of liquid protection and adequate sealing. Proposed laminated packing material has polyethylene tarephthalate, metallized, adhesive and polyethylene layers. Combination copper-aluminium evaporated layer is used as metallized layer, and two- component polyurethane layer is used as adhesive layer. Thickness of layers is as follows: polyethylene terephthalate layer - 20.0 - 40.0 mum, copper-aluminium layer - 80.0 - 120.0 Å, two-component polyurethane layer - 4.0 - 8.0 g/m2, and polyethylene layer - 20.0-100.0 mum. Layers are arranged in the following sequence: polyethylene terephthalate layer, copper-aluminium layer, two-component polyurethane layer and polyethylene or copper-aluminium layer, polyethylene terephthalate layer, two-component polyurethane layer and polyethylene layer. Laminated packing material has attractive appearance and is elastic. EFFECT: reduced gas permeability as to oxygen and carbon dioxide and aroma permeability. 2 ex
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