| 摘要 |
PROBLEM TO BE SOLVED: To provide a well-constructive and fireproof joint for connecting a fireproof double tube, with a thin fireproof layer. SOLUTION: A fiber fireproof adhesive layer 5 formed by impregnating a fired and carbonized acrylic fiber cloth 3 with an adhesive 4 is formed on the single face of an aluminum foil 2. After the acrylic fiber cloth is impregnated with the adhesive to be adhered to a fireproof outer tube constituting the fireproof double tube and to the aluminum foil, the acrylic fiber cloth is adhered to the aluminum foil. The aluminum foil and the fiber fireproof adhesive layer are formed into tapes, and slits 9 are provided in the side edges of the tapes, depending on cases. The aluminum foil is fired and painted in the same color as that of the fireproof outer tube. A fire retardant and pressure sensitive adhesive is used as the adhesive, and a fire retardant fiber mesh 8 is laid between the aluminum foil and the fiber fireproof adhesive layer. COPYRIGHT: (C)2004,JPO
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