# US 7,607,457 B2 · Insulation system for technical installations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,457 B2 - Document ID: US7607457B2 - Status: Granted - Kind: B2 - Application number: 10/575,483 - Filed: 2004-10-15 - Published: 2007-01-25 - Granted: 2009-10-27 - Earliest claimed: 2003-10-17 - Assignees: Saint-Gobain Isover - Inventors: Staffan Tigerfeldt - Web page: https://patentgrep.com/patent/US7607457B2 ## CPC - F16L 59/022: {with a single slit} - F24F 13/0209: {characterised by their connecting means, e.g. flanges} - F24F 13/0263: {Insulation for air ducts} - F24F 13/0281: {Multilayer duct} - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract The invention relates to an insulation system for pipes, containers, ventilation ducts and like installation parts which have an outer surface temperature which periodically is below the dew point of the ambient air. The insulation system comprises a thermally insulating layer and a vapour barrier arranged on one side of the thermally insulating layer. The insulation system has a hygroscopic material which is arranged between the vapour barrier and the thermally insulating layer, which hygroscopic material is at least partially connected with the vapour barrier. A combination of the vapour barrier and the hygroscopic material is connected with the thermally insulating layer in such a manner that the hygroscopic material partially makes contact with the thermally insulating layer. ## Claims ### Claim 1 An insulation system (1) for pipes, containers, ventilation ducts and like installation parts which have an outer surface temperature which periodically is below the dew point of the ambient air, said insulation system comprising a thermally insulating layer and (5), a layer of a vapour barrier (2) arranged on one side of the thermally insulating layer, and a layer of hygroscopic material (3), said layers being circumferentially arranged in such a manner that the insulation system (1), starting from the outside, comprises said vapour barrier (2), said layer of hygroscopic material (3), and said thermally insulating layer (5), the layer of hygroscopic material (3) being arranged between the layer of the vapour barrier (2) and the thermally insulating layer (5), said hygroscopic material (3) being at least partially connected with the vapour barrier (2), and the combination of the vapour barrier (2) and the hygroscopic material (3) being connected with the thermally insulating layer (5) in such a manner that the hygroscopic material (3) partially makes contact with the thermally insulating layer (5), and with said layer of hygroscopic material (3) being arranged so as not to make contact with the outer surface of the installation part that receives said insulation system. ### Claim 2 (depends on 1) An insulation system as claimed in claim 1, in which the hygroscopic material (3) is connected with the thermally insulating layer (5) by means of a thermoplastic binder (4) which is arranged so that, after heating to a temperature above its melting point, it exposes the hygroscopic material (3) to the thermally insulating layer (5). ### Claim 3 (depends on 2) An insulation system as claimed in claim 2, in which the vapour barrier (2), the hygroscopic material (3) and the thermoplastic binder (4) constitute a laminate (7). ### Claim 4 (depends on 3) An insulation system as claimed in claim 3, in which the thermoplastic binder (4) is arranged in a first layer next to the vapour barrier (2) and in a second layer next to the thermally insulating layer (5). ### Claim 5 (depends on 3) An insulation system as claimed in claim 3, in which the laminate (7) comprises perforations (8) which are adapted to make the hygroscopic material (3) communicate with the ambient air. ### Claim 6 (depends on 3) An insulation system as claimed in claim 3, in which the laminate (4) has such a width as to form flaps (11; 11a; 11b) which can be made to enclose pipes, containers, ventilation ducts and like installation parts. ### Claim 7 (depends on 3) An insulation system as claimed in claim 3, in which the vapour barrier (2) has moisture adaptive properties. ### Claim 8 (depends on 2) An insulation system as claimed in claim 2, in which the thermoplastic binder (4) is arranged as a non-continuous layer. ### Claim 9 (depends on 1) An insulation system as claimed in claim 1, in which the hygroscopic material (3) is thermoplastic. ### Claim 10 (depends on 1) An insulation system as claimed in claim 1, in which the vapour barrier (2) and the hygroscopic material (3) constitute a laminate (7). ### Claim 11 (depends on 10) An insulation system as claimed in claim 10, in which the laminate (7) comprises perforations (8) which are adapted to make the hygroscopic material (3) communicate with the ambient air. ### Claim 12 (depends on 10) An insulation system as claimed in claim 10, in which the laminate (4) has such a width as to form flaps (11; 11a; 11b) which can be made to enclose pipes, containers, ventilation ducts and like installation parts. ### Claim 13 (depends on 10) An insulation system as claimed in claim 10, in which the vapour barrier (2) has moisture adaptive properties. ### Claim 14 (depends on 1) An insulation system as claimed in claim 1, in which the hygroscopic material (5) is a non-continuous layer. ### Claim 15 (depends on 1) An insulation system as claimed in claim 1, in which the thermally insulating layer (5) comprises an additional hygroscopic material (14; 14′). ### Claim 16 (depends on 15) An insulation system as claimed in claim 15, in which the thermally insulating layer (5) and the additional hygroscopic material (14; 14′) constitute a flexible pipe shell, a pleated mat or a laminated mat. ### Claim 17 (depends on 1) An insulation system as claimed in claim 1, in which the hygroscopic material (3) forms a reinforcement of the vapour barrier (2). ### Claim 18 (depends on 1) An insulation system as claimed in claim 1, in which the vapour barrier (2) has moisture adaptive properties.