To improve efficiency and safety of sticking work and to suppress dew condensation in a room or the like due to high moisture permeability while surely preventing infiltration of rainwater or the like.
This roof underlayer sheet material is formed of a five layered-structure with a first hot melt layer 4 and a second hot melt layer 8 with predetermined total weight per unit area formed of a hot melt agent 5 used as an adhesive or a pressure sensitive adhesive for joining objects, laminated between a first nonwoven fabric sheet layer 3 and a second nonwoven fabric sheet layer 6 and between the second nonwoven fabric sheet layer 6 and a third nonwoven fabric sheet layer 9 to constitute an intermediate layer having a function of moisture permeability and waterproofness.
MIYOSHI MASAKAZU
| JPH0711716A | 1995-01-13 |
Eiichi Tamura
Seiji Iga
Toshiya Fujii
Nobuhiro Noguchi
Shigeru Yamaguchi