Lateral pipe lining material and lateral pipe lining method

A method for lining a lateral pipe using a lateral pipe lining material made of a tubular resin absorbing material impregnated with a setting resin, which has a flange at one end thereof and whose outer surface is coated with a highly airtight film, comprising the steps of:

• detachably attaching a sealing tube to an outer circumferential surface of said tubular resin absorbing material;
• introducing inside a main pipe said lateral pipe lining material with the sealing tube detachably attached to said tubular resin absorbing material;
• bringing the flange of said lateral pipe lining material into tight contact with a lateral pipe opening at the main pipe;
• inserting, while everting, the lateral pipe lining material by fluid pressure inside the lateral pipe from the main pipe toward the ground level;
• curing the setting resin impregnated in the lateral pipe lining material, while maintaining a state wherein it is pressed against the inner circumferential surface of the lateral pipe;
• and
• removing said sealing tube from the lateral pipe lining material after the curing is completed.