LAMINATED MATERIAL FOR PAPER CONTAINERS AND PAPER CONTAINERS USING IT

摘要

[Problem] To provide a paper container for foods capable of being fabricated by heat sealing which does not absorb flavors, such as limonene, and capable of storing a long period at ordinary temperature.;[Solving Means] The laminated material for paper containers is composed of paper substrate layer/adhesive for paper layer/first adhesive for barrier layer/barrier layer/second adhesive for barrier layer/heat-sealable PET resin layer, has an oxygen gas barrier ability of 2.0 ml/m2·D·atm or less, and the heat-sealable PET resin layer is made having a crystal portion of less than 15%, non-crystal portion of 85% or more.

主权项

1. A laminated material for paper containers which comprises paper substrate layer/adhesive for paper layer/first adhesive for barrier layer/barrier layer/second adhesive for barrier layer/heat-sealable PET resin layer, and has an oxygen gas barrier ability of 2.0 ml/m2·D·atm or less, and the heat-sealable PET resin layer has a crystal portion of less than 15% and a non-crystal portion of 85% or more represented by the following formula:crystalportion(%)=heatquantityoffusionpermole-heatquantityofcoldcrystallizationpermoleheatquantityoffusionpermoleofperfectcrystalofPET(26.9KJ)×100non-crystalportion(%)=100-crystalportion.[Mathematical1]