Packaging material with good gas barrier properties and also packaging container manufactured from the material

A packaging material for making packages requiring bending of the material in the formation of the package, comprising:

• (a) a paper or cardboard layer having an outer surface and an inner surface;
• (b) a gas barrier layer or aluminum foil spaced from the inner surface;
• (c) an intermediate layer of a foamed or expanded polyolefin material having a void fraction of at least 50%, comprising cells or cavities that exhibit it high ratio between length and width, are located centrally in the intermediate layer, are oriented so that the long parts of the cells or cavities are centrally parallel to each other, and are aligned at right angles to a line along which the packaging material is intended to be folded during shaping into a packaging container, said intermediate layer being between the gas barrier layer and the inner surface of the paper or cardboard layer;
• (d) an outer polyethylene coating on the outer surface of the paper or cardboard layer;
• and
• (c) a polyethylene coating on the gas barrier layer;
• upon bending, the voids in the intermediate layer at least partially collapse and tension on the gas barrier layer.

Packaging material with good gas barrier properties comprising:

• a skeletal layer of paper or cardboard,
• a gas barrier layer of a material with low elasticity which is placed against one side of the skeletal layer and is bound to the skeletal layer, and
• a layer of compressible binding agent with a thickness in the range of about 25-30 .mu.m placed between the skeletal layer and gas barrier layer, said layer of compressible binding agent having cells or cavities that exhibit a high ratio between length and width, are located centrally in the layer of compressible binding agent, are oriented so that the long parts of the cells or cavities are centrally parallel to each other, and are aligned at right angles to a line along which the packaging material is intended to be folded during shaping into a packaging container, wherein the proportion of cells or cavities relative to the total volume of the layer of compressible binding agent is at least 50%,
• whereby upon bending, the cells or cavities of the compressible binding agent at least partially collapse and relieve tension on the gas barrier layer.

Packaging material with good gas barrier properties comprising:

• a skeletal layer of paper or cardboard,
• a gas barrier layer of aluminum foil which is placed against one side of the skeletal layer and is bound to the skeletal layer, and
• a layer of compressible binding agent that is a foamed or expanded plastic material, having a thickness in the range of about 25-30 .mu.m placed between the skeletal layer and gas barrier layer, said layer of compressible binding agent having closed cells or cavities that exhibit a high ratio between length and width, are located centrally in the layer of compressible binding agent, are oriented so that the long parts of the cells or cavities are centrally parallel to each other, and are aligned at right angles to a line along which the packaging material is intended to be folded during shaping into a packaging container, wherein the proportion of cells or cavities relative to the total volume of the layer of compressible binding agent is at least 50%,
• whereby upon bending, the cells or cavities of the compressible binding agent at least partially collapse and relieve tension on the gas barrier layer.