TWO SHOT POLYMER BASED SLEEVE FOR JOINING PVC PIPE SECTIONS UTILIZING A RIEBER TYPE PROCESS

摘要

An improved Rieber type seal having an annular extending profile composed of a first thermoplastic material exhibiting a first rigidity and a second thermoplastic material having a second lesser rigidity is applied over the first material such that at least one surface of the first material is exposed upon installing within a first pipe section and contacts an inserting end of a second pipe section. The first material can include a glass filled polymer reinforced or other thermo rigid material, whereas the second material may include a softer thermoplastic backing material injected around the first material in a solidifying stage or may be one selected from the group including a thermoplastic vulcanite (TPV), thermoplastic urethane (TPU) or styrene ethylene butylene styrene (SEBS).