Anisotropic liner used in mending water supply pipe and sewage pipe

摘要

The present invention relates to an anisotropic liner for repairing water and sewage pipes, and more specifically, to an adhesive portion in a coating felt (1) in which a waterproof film layer (1a) is formed on a cylindrical nonwoven fabric (1b) having a joining portion (4). Endothelial felt (2) consisting of cylindrical nonwoven fabrics (2a, 2b) having (4) is sandwiched and laminated, and the elastic modulus in the longitudinal direction (modulus) is greater than the elastic modulus in the width direction (modulus), so that the length The anisotropic fiber sheet 3 having a higher elongation in the width direction than the elongation in the direction (i) forms the inside of the cylindrical nonwoven fabric 1b constituting the coating felt 1, (ii) the coating felt 1 At least one selected from a lower end surface of the cylindrical nonwoven fabric 1b, (i) an upper end surface of the endothelial felt 2, (i) an interior of the coating felt 1 and (i) a lower end surface of the coating felt 1 It is arranged at any one position, and in the longitudinal direction (longitudinal direction) of the anisotropic liner It is characterized in that the stress required at the time of stretching so that the elongation rate is 20% is 3 to 15 times the stress required at the time of stretching so that the elongation rate calculated by the following formula (I) in the diameter direction (lateral direction) of the anisotropic liner is 20%. do.;The present invention is easy to install because there is little deformation in the longitudinal direction and there is stability in construction while easily expanding in the diameter direction (lateral direction) so as to be in close contact with the inside of existing water and sewage pipes.;In addition, the present invention does not directly contact the waterproof film layer (1a) and the anisotropic fiber sheet (3), the waterproof film layer (1a) of the coating felt due to the vapor generated by the solvent when impregnated the cured resin during construction The phenomenon which peels from the cylindrical nonwoven fabric 1b can be prevented effectively.;Anisotropic, liner, water pipe, sewer pipe, anisotropic fiber sheet, coated felt, endothelial felt, workability.