An astonishing process, bonding rope sheath and core without affecting the rope's suppleness. Even in the hardest conditions of use sheath slippage is suppressed. If the sheath is cut or torn, core and sheath remain bonded together.With a standard rope, if the sheath is cut by abrasion over an edge, a frequent occurrence in work at height and in rescues, it slides and gathers over some metres. It then becomes impossible to pass this zone, either to ascend or to descend. If the problem occurs near to the end of the rope the sheath may slide off completely, and the user fall to the ground. With the UNICORE process the sheath remains in place and the user may escape, either by descent or ascent, taking all necessary precautions. He/she is not stuck without a solution on the rope.The UNICORE process brings an undeniable gain in security during delicate and dangerous operations.