Hose, specifically for refrigerant applications
A hose which has at least the following plies in the following order: an innermost layer (A 4 ) which is based on thermoplastic material or thermoplastic elastomer material; an internal layer (A 5 ) which is applied to the innermost layer (A 4 ) and which is based on elastomer material; at least one reinforcing element ply (B, B 1 , B 2 ), wherein the reinforcing element is arranged at an angle smaller than the neutral angle of 54.7°, and possibly an external layer (C) which is based on polymer material. The hose is suitable in particular as a pressure carrier hose for refrigerant lines, in particular for CO 2 , for use as a pressure carrier of corrugated pipes.
1. A pressure carrier hose for refrigerant lines comprising at least the following plies in the following order:
an innermost layer (A 4 ) which is based on a thermoplastic material or a thermoplastic elastomer material;
an internal layer (A 5 ) which is applied to the innermost layer (A 4 ) and which is based on a second elastomer material;
at least one reinforcing element ply (B, B 1 , B 2 ), wherein the reinforcing element is arranged at an angle smaller than a neutral angle of 54.7°;
an optional external layer (C) which is based on a polymer material;
wherein the thermoplastic material or the thermoplastic elastomer material of the innermost layer (A 4 ) comprises a bond-modified thermoplastic copolyester elastomer (TPC); and is selected from at least one member of the group consisting of thermoplastic elastomer (TPE), polyamide, fluoropolymer, silicone polymer and a combination thereof; and
wherein the polyamide is an elastomer-modified polyamide.
2. The pressure carrier hose as claimed in claim 1 , wherein the thermoplastic material or the thermoplastic elastomer material of the innermost layer (A 4 ) consists of thermoplastic elastomer (TPE).
3. The pressure carrier hose as claimed in claim 1 , wherein the innermost layer (A 4 ) has a wall thickness in the range of from 0.05 to 0.6 mm.
4. The pressure carrier hose as claimed in claim 3 , wherein the innermost layer (A 4 ) has a wall thickness in the range of from 0.08 to 0.15 mm.
5. A pressure carrier hose for refrigerant lines comprising at least the following plies in the following order:
an innermost layer (A 4 ) which is based on a thermoplastic material or a thermoplastic elastomer material;
an internal layer (A 5 ) which is applied to the innermost layer (A 4 ) and which is based on a second elastomer material;
at least one reinforcing element ply (B, B 1 , B 2 ), wherein the reinforcing element is arranged at an angle smaller than a neutral angle of 54.7°;
an optional external layer (C) which is based on a polymer material; and
wherein the at least one reinforcing element ply comprises two reinforcing element plies (B 1 , B 2 ), and wherein an intermediate layer (D) based on a third elastomer material is located between each of the two reinforcing element plies (B 1 , B 2 ).
6. The pressure carrier hose as claimed in claim 5 , wherein the polymer material of the external layer @ is present and formed of a fourth elastomer material, and wherein the third elastomer material and the fourth elastomer material, independently of one another, are selected from the group consisting of ethylene-acrylate rubber (AEM), acrylate rubber (ACM), fluoro rubber (FPM), ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM), hydrogenated acrylonitrile-butadiene rubber (HNBR), brominated copolymer of isobutylene and para-methylstyrene (BIMS), ethylene-vinyl acetate rubber (EVM), silicone rubber (VMQ) or any combination thereof.
7. The pressure carrier hose as claimed in claim 6 , wherein the third elastomer material and the fourth elastomer material are both ethylene-acrylate rubber (AEM).
8. The pressure carrier hose as claimed in claim 7 , wherein the ethylene-acrylate rubber (AEM) is crosslinked by diamines.
9. The pressure carrier hose as claimed in claim 1 , wherein the reinforcing element is formed from metal wire.
10. The pressure carrier hose as claimed in claim 1 , wherein the reinforcing element is present in woven or spiralized form.
11. The pressure carrier hose as claimed in claim 1 , wherein the reinforcing element is arranged at an angle in the range of from 15 to 53.6°.
12. The pressure carrier hose as claimed in claim 11 , wherein the reinforcing element is arranged at an angle in the range of from 30 to 37°.
13. The pressure carrier hose as claimed in claim 1 , wherein a corrugated pipe is arranged inside the hose, and wherein CO 2 refrigerant at a temperature of 160° C. flows through the corrugated pipe.