| 摘要 |
PURPOSE: An environmentally-friendly soluble soft back is provided to stable performance with waterproofing and steam. CONSTITUTION: An environmentally-friendly soluble soft back is a kind of soft back for fluid, which comprises at least three layers and to which modifier is added to polypropylene. The first layer comprises modified polypropylene. The second layer which is overlapped with the first layer is formed of modified polypropylene. The additive amount of the modifier is maximally 80%. The third layer is formed of modified polypropylene. |
