| 摘要 |
PURPOSE:To eliminate the increasing of the thickness of a film or mixing of a reinforcing material by realizing a high tensile strength while reducing the combustion heat by adding calcium carbonate. CONSTITUTION:For a multiple layer inflation film which is constituted of at least 3 layers such as an outer layer, inner layer and an intermediate layer which is inserted between the outer layer and inner layer, an ethylene based synthetic resin with a melt index of 0.01-5g/10min is used as the main component of respective layers of the outer, intermediate and inner layers. In addition, the melt index of the intermediate layer is larger than the melt index of the outer and inner layers, and also the intermediate layer contains calcium carbonate by a higher containing ratio than the outer and inner layers. |
