High elasticity double -wall pipe

The utility model relates to a double -wall pipe field, concretely relates to high elasticity double -wall pipe, including inlayer hot -melt adhesive layer and the outer PE pyrocondensation layer thatthe coextru -lamination formed, outer PE pyrocondensation layer is outside including a compound PE layer, PP layer and the 2nd PE layer that forms, still including setting up the first permeable formation between a PE layer and PP layer, sets up the second permeable formation between the 2nd PE layer and PP layer, inlayer hot -melt adhesive layer's internal surface is the cockscomb structure. Theutility model discloses good, the anti deformability of elasticity is strong, long service life. 本实用新型涉及双壁管领域，具体涉及种高弹性双壁管，包括共挤复合而成的内层热熔胶层和外层PE热缩层；所述外层PE热缩层外部包括复合而成的第PE层、PP层和第二PE层，还包括设置于第PE层和PP层之间的第渗透层，设置于第二PE层和PP层之间的第二渗透层；所述内层热熔胶层的内表面呈锯齿状。本实用新型弹性好、抗形变能力强、使用寿命长。