Heat sealed plastic bags are widely used in food packages, vacuum-seal, and so on. Heat seal technology is an essential technique for intermediate packaging industries. There are different kinds of sealing technologies, which would be selected for suitable heat sealed properties of the film by controlling temperature, pressure and dwell time. It is very important to understand about heat sealing properties of these packages. However, it is considered that the seal bar shape influence the properties of heat sealed package, whereas there is a little research which is focused on the effect of heat seal bar shape. In this study, oriented polypropylene/cast polypropylene (OPP/CPP) laminated films were heat sealed by various stainless mesh sheets in order to evaluating the effect of heat sealing bar shape on heat sealed properties. The heat sealed conditions were set at heat sealed time of 1.0 s with a pressure of 0.3 MPa at various heat sealed temperatures of 100 to 120ºC. The difference of higher order structure of these films was discussed on the basis of results of micro-Raman spectroscopy, DSC and peel test. From the result, it was found that peel strength were affected by the heat sealing bar surface shape. We can analyze the very small area and changes on the basis of the results of heat sealed part by using micro-Raman spectroscopy imaging.