Safety hose for aggressive chemicals

摘要

A bonding system (III) between the reinforcement system (II) and the outside layer (3) is fitted with a radial, axial or spiral two zone system (A,B), zone A being less adhesive than zone (B). In an elastomer hose with two reinforcing systems (I,II) and an interposed intermediate layer (2), with system (I) less expansive but of high chemical resistance where it faces the inner layer (1) of the sleeve, the bonding system between system (II) and layer (2) is in two radial, axial or spiral zones (A,B), again with zone (A) being less adhesive. The bonding system (III) should be integrally joined to the outer layer (3), the differentiated effect of the two zones (A,B) displaying itself directly on the reinforcing system (II). Otherwise, using a self-contained bonding system, this differentiated effect takes place directly in system (II) when this faces the side (4). The two-zone bonding system should extend right along the hose, zone (A) having an adhesive strength of maximum 0. 5 N/mm as against zone (B) of minimum adhesion 2 N/mm. The width of the more powerful zone (B) equals 10-30% that of the weaker zone (A), the two reinforcing systems (I,II) having interposed plastics or metal spiral close to the two systems and of high chemical resistance.