SEALING DEVICE FOR PACKAGING MATERIAL AND MEASURING METHOD FOR FUSION TEMPERATURE OF PLASTICS

摘要

A sealing device 30 for a packaging material 10, comprising a linear sealing device 31 for sandwiching layers to be sealed 11A, 12A of plastic sheets 11, 12 are sandwiched by sealing bars 41, 42 narrower than a sealing width, and pressuring the layers to be sealed in a heated state, a surface sealing device 32 for sandwiching the layers to be sealed 11A, 12A of the plastic sheets 11, 12 with sealing bars 51, 52 of a width necessary for sealing by the sealing width, and pressing the layers to be sealed in a melting state.