| 摘要 |
PURPOSE:To make the contents of a bag visible from outside, by providing a polyethylene resin layer containing a polyethylene resin having a specified physical property with the haze strictly below 95% to prevent water from spilling out of a packing bag through a gel membrane for electrophoresis with a moistureproofing property. CONSTITUTION:A packing bag 4 for electrophoretic sheet contains more than 50wt% of a polyethylene resin with the density of 0.935-0.970g/cm<2> and the melt index of 0.1-1.5g/10min and includes a polyethylene-based resin layer 70-200mum thick with the haze strictly below 95%. Only if said specified polyethylene based resin layer is included, the bag may be of a single layer or of a double extrusion layer or of a triple extrusion layer formed with other resin layer or layers. But it should be noted that the haze must be always below 95% as a whole. The top and bottom of the bag 4 are sealed by heat to form sealed parts 5a and 5b, inside which an electrophoretic sheet 6 is housed. |
