| 摘要 |
The present invention refers to a method for sealing a first packaging material laminate ( 10 ) to a second packaging laminate ( 12 ), at least the first laminate ( 10 ) comprising at least one layer of magnetizable particles and a sealable layer ( 34 ). The method is characterized in facing the sealable layer ( 34 ) towards the second laminate ( 12 ), providing an alternating magnetic field to the laminates in a sealing zone, thereby generating magnetic hysteresis losses in the laminate ( 10 ) comprising the magnetizable particles, which losses create heat substantially melting the sealable layer ( 34 ) in the sealing zone, and applying a sealing pressure to the first and second laminate ( 10, 12 ), which pressure causes the first and second laminate ( 10, 12 ) to be pressed together in the sealing zone, thereby sealing the laminates ( 10, 12 ) to each other. The invention also relates to a device for carrying out the method. |
