Tetra Laval Holdings & Finance S.a.

Tetra Laval Holding & Finance S.a.

Monika Bürki

Cesare Lorenzetti

Torsten Olofsson

Gil Rochat

Sven Andrèn

Alain Bonnebault

A gas barrier packaging laminate having durability to stress crack formation and yet a bending stiffness and good integrity between the laminate layers, includes outer layers of heat-sealable polyolefin, two polymer carrier layers each being coated with a SiOx gas barrier layer, and an intermediate polymer layer that includes at least first and second part-layers. The first part-layer has a higher stiffness than the second part-layer, and the second part-layer has higher elastomeric properties than the first part-layer. A stiff structural sandwich construction is formed by the two stiff carrier layers separated by the intermediate layer that is also shock absorbing to prevent stress-cracking of the SiOx layers. A packaging container manufactured from the packaging laminate and a method of manufacturing of the packaging laminate are also disclosed.

Plastic gas barrier packaging laminate

The invention relates to a transparent gas barrier packaging laminate having a required bending stiffness, comprising outer layers of heat-sealable polyolefin, two polymer carrier layers each being coated with a SiOx gas barrier layer, wherein the two polymer carrier layers with SiOx layers are laminated to each other by means of an intermediate polymer layer, which in comparison to the other surrounding layers is relatively stiff and thicker. The required stiffness of the packaging laminate is obtained by the I-beam interaction between the two carrier layers and the intermediate distancing polymer layer. Preferably, the thickness of the intermediate polymer layer constitutes from about 30 to about 55% of the total thickness of the packaging laminate. The invention also relates to a packaging container such as a pouch or similar manufactured from the packaging laminate and to a method of manufacturing of the packaging laminate.

Transparent plastic gas barrier packaging laminate

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Villars-Mendraz, Switzerland

Monika Bürki