# US 10,501,931 B2 · Method of producing an insulation product and a product obtained by said method

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- Number: US 10,501,931 B2
- Document ID: US10501931B2
- Status: Granted
- Kind: B2
- Application number: 16/062,328
- Filed: 2016-12-07
- Published: 2018-12-27
- Granted: 2019-12-10
- Earliest claimed: 2015-12-17
- Assignees: Rockwool International A/S
- Applicants: Rockwool International A/S
- Inventors: Jens Eg Rahbek
- Web page: https://patentgrep.com/patent/US10501931B2

## CPC

- B29D 99/001: {Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings (articles with hollow walls B29D24/00)}
- B29C 70/682: {Preformed parts characterised by their structure, e.g. form}
- B29C 70/70: Completely encapsulating inserts {(B29C70/86 takes precedence)}
- B32B 1/08: Tubular products
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 5/00: Layered products characterised by the non- homogeneity or physical structure {, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts}
- B32B 5/16: characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)}
- B32B 7/05: the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection (using interposed adhesives or bonding materials applied in spaced arrangements B32B7/14)
- B32B 27/08: of synthetic resin
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/14: next to a particulate layer
- E04B 1/806: {with air or gas pockets included in the slab}
- F16L 59/026: {Mattresses, mats, blankets or the like}
- F16L 59/04: Arrangements using dry fillers, e.g. using slag wool
- F16L 59/06: Arrangements using an air layer or vacuum
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 37/182: {one or more of the layers being plastic}
- B32B 2038/0052: {Other operations not otherwise provided for}
- B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer
- B32B 2255/205: Metallic coating
- B32B 2260/025: Particulate layer
- B32B 2260/04: Impregnation, embedding, or binder material
- B32B 2262/02: Synthetic macromolecular fibres
- B32B 2262/06: Vegetal fibres
- B32B 2262/067: Wood fibres
- B32B 2262/08: Animal fibres, e.g. hair, wool, silk
- B32B 2262/101: Glass fibres
- B32B 2262/108: Rockwool fibres
- B32B 2264/10: Inorganic particles
- B32B 2305/026: Porous
- B32B 2307/302: Conductive
- B32B 2307/304: Insulating
- B32B 2307/31: Heat sealable
- B32B 2307/7242: Non-permeable
- B32B 2309/66: Fluid other than air
- B32B 2419/00: Buildings or parts thereof
- F25D 2201/124: of fibrous type
- F25D 2201/128: of foil type
- F25D 2201/14: using subatmospheric pressure
- Y02A 30/242: Slab shaped vacuum insulation
- Y02B 80/10: Insulation, e.g. vacuum or aerogel insulation
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

The present invention concerns a method of producing an insulation product comprising a board of porous insulation material wrapped in a gas-impermeable foil, said method comprising the steps of providing a succession of porous insulation material boards on a first conveyor apparatus and feeding the boards on a second conveyor apparatus; providing wrapping foil and wrapping said foil to form a tube around the boards on said second conveyor apparatus, flushing the boards with an insulating gas, and sealing the wrapping foil at the ends of each board transverse to the direction of travel of the second conveyor apparatus.

## Claims

### Claim 1

A method of producing an insulation product comprising a board of porous insulation material wrapped in a gas-impermeable foil, the method comprising the steps of:
providing a succession of porous insulation material boards on a first conveyor apparatus and feeding the boards on a second conveyor apparatus;
providing wrapping foil and a flow-wrapping apparatus on the second conveyor apparatus, and wrapping the wrapping foil to form a tubular wrapping foil with a tubular configuration around the boards on the flow-wrapping apparatus on the second conveyor apparatus;
flushing the boards with an insulating gas; and then
sealing the wrapping foil at a front end and a rear end of each board transverse to a direction of travel of the second conveyor apparatus.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising pre-compressing the porous insulation material on the first conveyor apparatus, the pre-compressing being within a range of 5-20% of a nominal thickness of the porous insulation material.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the pre-compression is maintained until the step of sealing of the wrapping foil at the front end and the rear end of the board has been performed.

### Claim 4 (depends on 1)

The method according to claim 1, further comprising pre-heating the porous insulation material on the first conveyor apparatus.

### Claim 5 (depends on 1)

The method according to claim 1, further comprising preheating the insulating gas to obtain a pre-heated insulating gas prior to flushing an interior of the tubular wrapping foil with the pre-heated insulating gas.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the step of flushing further comprise flushing the interior of the tubular wrapping foil and the boards with the insulating gas.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the step of flushing substitutes between 80-98% of an air inside the tubular wrapping foil and the boards with the insulating gas.

### Claim 8 (depends on 5)

The method according to claim 5, further comprising selecting the insulating gas from the group consisting of Carbondioxide (CO2), Argon or other gases having thermal conductivity lower than air.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the wrapping foil is a multilayer plastic foil, and the step of forming the tubular wrapping foil further comprises longitudinal welding of the wrapping foil.