Patent ID: 7481246

Claim:
A lateral pipe lining material comprising: a tubular resin-absorbing material impregnated with a curable resin and having a brim attached at one end thereof, the lateral pipe lining material being insertable into a lateral pipe to be lined with the brim being brought close to a peripheral edge of a lateral pipe opening of a main pipe, and a ring-shaped sealing member composed of an elastic material attached on a surface of the brim on the lateral pipe opening side at a portion on the tubular resin-absorbing material side, the ring-shaped sealing member having an annular protruding part on an upper surface thereof, the annular protruding part having an outer diameter that is substantially the same size as the inner diameter of the lateral pipe opening and being inserted into the lateral pipe opening to seal a gap that is formed between an inner peripheral surface of the main pipe and a surface of the brim facing the inner peripheral surface thereof when the lateral pipe lining material is inserted into the lateral pipe.