| 摘要 |
<p>The invention relates to a gas barrier packaging laminate ( 10 ) having durability to stress crack formation and yet a bending stiffness and good integrity between the laminate layers, comprising outer layers of heat-sealable polyolefin ( 16, 17 ), two polymer carrier layers ( 11, 12 ) each being coated with a SiOx gas barrier layer ( 13, 14 ), wherein the two polymer carrier layers with SiOx layers are laminated to each other by means of an intermediate polymer layer ( 15 ), which includes a thermoplastic polymer having high elastomeric properties. The required stiffness of the packaging laminate is obtained by forming a structural sandwich construction with two stiff carrier layers separated by a relatively thick lower density intermediate layer. Preferably, the thickness of the intermediate polymer layer ( 15 ) constitutes from about 30 to about 55% of the total thickness of the packaging laminate ( 10 ). 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.</p> |
