Refrigerant hose
View Patent ↗A hose comprising a core layer, an elastomeric friction layer overlaying the core layer, at least one reinforcement layer overlaying the friction layer, and a cover layer overlaying the at least one reinforcement layer, wherein the core layer is comprised of a blend of two different non-plasticized polyamides.
1. A hose comprising a core layer, an elastomeric friction layer overlaying the core layer, at least one reinforcement layer overlaying the friction layer, and a cover layer overlaying the at least one reinforcement layer, wherein the core layer is comprised of a blend of two different non-plasticized polyamides; wherein the two different non-plasticized polyamides are nylon 6 and a copolymer of nylon 6 and nylon 66 and are present in a weight ratio of nylon 6 to copolymer of nylon 6 and nylon 66 from about 1 to about 3; and wherein the hose has a permeation rate of from 0.15 to 0.23 g/m/day.
2. The hose in accordance with claim 1 wherein the two different non-plasticized polyamides are nylon 6 and a copolymer of nylon 6 and a copolymer of nylon 6 and nylon 66 and are present in a weight ratio of nylon 6 to copolymer of nylon 6 and nylon 66 from about 1.5 to about 2.5.
3. A hose in accordance with claim 1 wherein the elastomeric friction layer comprises EPDM.
4. A hose in accordance with claim 1 wherein the cover layer comprises AEM.
5. A hose in accordance with claim 1 wherein the core layer has a gauge of from about 0.3 to about 0.4 mm.
6. A hose in accordance with claim 5 wherein the nylon 6 and a copolymer of nylon 6 and nylon 66 and are present in a weight ratio of nylon 6 to copolymer of nylon 6 and nylon 66 of about 2 to 1.
7. A hose consisting of a core layer, an elastomeric friction layer overlaying the core layer, at least one reinforcement layer overlaying the friction layer, and a cover layer overlaying the at least one reinforcement layer; wherein the core layer consists of a blend of two different non-plasticized polyamides; wherein the two different non-plasticized polyamides are nylon 6 and a copolymer of nylon 6 and nylon 66 and are present in a weight ratio of nylon 6 to copolymer of nylon 6 and nylon 66 from about 1 to about 3; and wherein the hose has a permeation rate of less than 0.5 g/m/day.
8. A hose in accordance with claim 7 wherein the hose has a permeation rate of from 0.15 to 0.23 g/m/day.
9. A hose in accordance with claim 8 wherein the core layer has a gauge of from about 0.3 to about 0.4 mm.
10. A hose in accordance with claim 9 wherein the nylon 6 and a copolymer of nylon 6 and nylon 66 and are present in a weight ratio of nylon 6 to copolymer of nylon 6 and nylon 66 of about 2 to 1.