EXTENSIBLE FLEXIBLE HOSE, AND METHOD AND PRODUCTION LINE FOR CONTINUOUSLY MANUFACTURING THEREOF

摘要

The hose comprises at least one inner layer (10) and one outer layer (20) made of elastic polymeric material; at least one textile reinforcement layer (30, 40) interposed between said at least one inner and outer layers (10, 20). The inner layer (10) and the outer layer (20) are reciprocally coupled to form a unitary tubular member (50) internally to which the textile reinforcement layer (30, 40) is embedded. The unitary tubular member (50) has an elasticity such to automatically elongate upon the working pressure given by the liquid flowing therethrough to increase its original length and such to automatically recover once the working pressure stops. The textile reinforcement layer (30, 40) is susceptible to move from a rest configuration that has when the working pressure stops to a working configuration that has when said unitary tubular member (50) elongates upon the working pressure and vice-versa.