Low-weight profiles and hoses having high flexural fatigue

A flexible hose comprising a profile which is spirally wound with consecutive windings of the profile secured to each other by means of a weld,

• wherein the profile comprises a polymer material comprising a first polyethylene and a second polyethylene, wherein the first polyethylene is a very low-density polyethylene and the second polyethylene is a linear low-density polyethylene,
• wherein the first polyethylene and the second polyethylene are the sole polymers in the polymer material,
• wherein the flexural modulus of said first polyethylene is between 5 MPa, and 500 MPa and wherein the flexural modulus of said second polyethylene is between 5 MPa and 500 MPa, such that the flexural modulus of the polymer material is between 30 MPa and 300 MPa, wherein the flexural modulus is measured in accordance with ASTM D790-17;
• wherein the flexible hose has an inner diameter of between 31 mm and 39 mm, wherein the weight of the flexible hose is between 80 g/m and 220 g/m, wherein the memory of the flexible hose having an initial outer diameter d1, determined in accordance with a test wherein a load of 700 N is applied to the flexible hose between two plates of 80x80 mm for 10 seconds at a temperature of 20° C., and wherein the resistance against deformation (the memory) is calculated from d2/d1*100%, wherein d2 is the outer diameter of the flexible hose 1 minute after removing the load, is between about 90% and 98%, wherein the hose resists vacuum of 400 millibar at the inside of the hose without forming a kink while bended, wherein the flex life of the hose is at least 40.000 cycles, according to the standardized repeated bending test (IEC 60312-1, Edition 1.0 (2010), No 6.9 (2.5 kg)), and wherein the melt index of said polymer material, as measured in accordance with ASTM D1238-13, is between 0,3 g/10 min and 2 g/10 min.

A flexible hose comprising a profile which is spirally wound with consecutive windings of the profile secured to each other by means of a weld,

• wherein the profile comprises a polymer material comprising a first polyethylene and a second polyethylene, wherein the first polyethylene is a very low-density polyethylene and the second polyethylene is a linear low-density polyethylene,
• wherein the first polyethylene and the second polyethylene are the sole polymers in the polymer material,
• wherein the flexural modulus of said first polyethylene is between 5 MPa and 500 MPa and wherein the flexural modulus of said second polyethylene is between 5 MPa and 500 MPa, such that the flexural modulus of the polymer material is between 30 MPa and 300 MPa, wherein the flexural modulus is measured in accordance with ASTM D790-17, wherein the flexural modulus of the polymer material, as measured in accordance with ASTM D790-17, is between 100 MPa and 250 MPa, wherein the flexible hose has an inner diameter of between 31 and 33 mm and a weight of between 80 g/m and 160 g/m, wherein the memory of the flexible hose having an initial outer diameter d1, determined in accordance with a test wherein a load of 700 N is applied to the flexible hose between two plates of 80x80 mm for 10 seconds at a temperature of 20° C., and wherein the resistance against deformation (the memory) is calculated from d2/d1*100%, wherein d2 is the outer diameter of the flexible hose 1 minute after removing the load, is between about 90% and 98%, wherein the hose resists vacuum of 400 millibar at the inside of the hose without forming a kink while bended, wherein the flex life of the hose is at least 40.000 cycles, according to the standardized repeated bending test (IEC 60312-1, Edition 1.0 (2010), No 6.9 (2.5 kg)), and wherein the melt index of said polymer material, as measured in accordance with ASTM D1238-13, is between 0,3 g/10 min and 2 g/10 min.

A flexible hose comprising a profile which is spirally wound with consecutive windings of the profile secured to each other by means of a weld,

• wherein the profile comprises a polymer material comprising, a first polyethylene and a second polyethylene, wherein the first polyethylene is a very low-density polyethylene and the second polyethylene is a linear low-density polyethylene,
• wherein the first polyethylene and the second polyethylene are the sole polymers in the polymer material,
• wherein the flexural modulus of said first polyethylene is between 5 MPa and 500 MPa and wherein the flexural modulus of said second polyethylene is between 5 MPa and 500 MPa, such that the flexural modulus of the polymer material is between 30 MPa and 300 MPa, wherein the flexural modulus is measured in accordance with ASTM D790-17, wherein the flexural modulus of the polymer material, as measured in accordance with ASTM D790-17, is between 100 MPa and 250 MPa, wherein the flexible hose has an inner diameter of between 33 and 35 mm and a weight of between 130 g/m and 210 g/m, wherein the memory of the flexible hose having an initial outer diameter d1, determined in accordance with a test wherein a load of 700 N is applied to the flexible hose between two plates of 80x80 mm for 10 seconds at a temperature of 20° C., and wherein the resistance against deformation (the memory) is calculated from d2/d1*100%, wherein d2 is the outer diameter of the flexible hose 1 minute after removing the load, is between about 90% and 98%, the hose resists vacuum of 400 millibar at the inside of the hose without forming a kink while bended, wherein the flex life of the hose is at least 40.000 cycles, according to the standardized repeated bending test (IEC 60312-1, Edition 1.0 (2010), No 6.9 (2.5 kg)), and wherein the melt index of said polymer material, as measured in accordance with ASTM D1238-13, is between 0,3 g/10 min and 2 g/10 min.

A flexible hose comprising a profile which is spirally wound with consecutive windings of the profile secured to each other by means of a weld,

• wherein the profile comprises a polymer material comprising a first polyethylene and a second polyethylene, wherein the first polyethylene is a very low-density polyethylene and the second polyethylene is a linear low-density-polyethylene,
• wherein the first polyethylene and the second polyethylene are the sole polymers in the polymer material,
• wherein the flexural modulus of said first polyethylene is between 5 MPa and 500 MPa and wherein the flexural modulus of said second polyethylene is between 5 MPa and 500 MPa, such that the flexural modulus of the polymer material is between 30 MPa and 300 MPa, wherein the flexural modulus is measured in accordance with ASTM D790-17, wherein the flexural modulus of the polymer material, as measured in accordance with ASTM D790-17, is between 100 MPa and 250 MPa, wherein the flexible hose has an inner diameter of between 35 and 37 mm and a weight of between 150 g/m and 220 g/m, wherein the memory of the flexible hose having an initial outer diameter d1, determined in accordance with a test wherein a load of 700 N is applied to the flexible hose between two plates of 80x80 mm for 10 seconds at a temperature of 20° C., and wherein the resistance against deformation (the memory) is calculated from d2/d1*100%, wherein d2 is the outer diameter of the flexible hose 1 minute after removing the load, is between about 90% and 98%, the hose resists vacuum of 400 millibar at the inside of the hose without forming a kink while bended, wherein the flex life of the hose is at least 40.000 cycles, according to the standardized repeated bending test (IEC 60312-1, Edition 1.0 (2010), No 6.9 (2.5 kg)), and wherein the melt index of said polymer material, as measured in accordance with ASTM D1238-13, is between 0,3 g/10 min and 2 g/10 min.