[특허]Method for the production of a vacuum insulation element wrapped in a film, filled with powder

VA-Q-TEC AG

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Method for the production of a vacuum insulation element wrapped in a film, filled with powder

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65B-031/02
미국특허분류(USC)	053/432; 053/436; 053/079; 053/086
출원번호	US-0992363 (2006-09-22)
등록번호	US-8281558 (2012-10-09)
우선권정보	DE-10 2005 045 726 (2005-09-23)
국제출원번호	PCT/EP2006/009247 (2006-09-22)
§371/§102 date	20090910 (20090910)
국제공개번호	WO2007/033836 (2007-03-29)
발명자 / 주소	Hiemeyer, Jochen Caps, Roland
출원인 / 주소	VA-Q-TEC AG
대리인 / 주소	Pandiscio & Pandiscio
인용정보	피인용 횟수 : 21 인용 특허 : 9

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The invention relates to a method for producing an especially panel-shaped vacuum insulation element which is wrapped in a film and is filled with a powder. According to the method, the unmolded, loose powder is filled, particularly poured, into the opening of a bag which is formed from a high-barrier film and is open on one side. A filter material that is permeable to air and impermeable to powder dust is fixed to the internal face of the film bag in the area of the opening of the filled film bag such that the interior of the bag is closed in a dust-tig...

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1. A method for the production of a panel-shaped evacuated heat insulation element, enclosed in film of the form of a flat film bag (1) filled with an unmolded, loose powder (4), the method comprising the steps of: a) providing a filter material (8) which is folded or preformed in the shape of a trough with one open side face, the length of the trough corresponding to the width of the evacuated heat insulation element and the width of the trough corresponding to the thickness of the evacuated heat insulation element;b) in the area of an opening (6) on one side of the film bag (1), the trough-shaped filter material (8), which is air-permeable but impermeable to powder dust (4), being fixed to an internal face of the film bag (1) such that the bag's interior is sealed off in a dust-tight manner but adapted to permit air to exit;c) evacuating the interior of the dust-tight, filled sealed film bag; andd) sealing the evacuated film bag in an airtight manner under a vacuum. 2. Method according to claim 1, wherein the film bag (1) is an aluminum composite film (2) and/or a metalized high-barrier film (2). 3. Method according to claim 1, wherein the film bag (1) is on a first side of an aluminum composite film (2) and on a second side of a high-barrier film free of aluminum film (2), the sides being sealed with one another along edges (3) thereof. 4. Method according to claim 1, wherein on the internal face of the film bag (1) a metal disk with sensor fabric is affixed, and is adapted to non-destructively detect internal gas pressure in the heat insulation element. 5. Method according to claim 1, wherein the powder (4) contains pyrogenic silica and/or precipitated silica. 6. Method according to claim 5, wherein the powder (4) contains perlite powder with a grain size smaller than 0.1 mm. 7. Method according to claim 6, wherein a proportion of the perlite powder of up to 90%, and the pyrogenic and/or precipitated silica is mixed in a proportion of at least 10%. 8. Method according to claim 1, wherein the powder (4) contains a drying agent selected from zeolite and calcium oxide. 9. Method according to claim 1, wherein the powder (4) contains a getter material. 10. Method according to claim 1, wherein the film bag (1) is adapted to bulge out by a factor of the thickness of the heat insulation element when the powder (4) is filled. 11. Method according to claim 1, wherein a selected one of a laminar, generally two-dimensional element and a voluminous, three-dimensional element is used as the filter material (8). 12. Method according to claim 1, wherein a nonwoven polyester fabric is used as the filter material (8). 13. Method according to claim 11, wherein the laminar filter material (8) is folded from a strip, the length of the strip corresponding generally to a width of the film bag (1). 14. Method according to claim 11, wherein the laminar filter material (8) is preformed in a generally trough-like shape with one open side face, the length of the trough generally corresponding to the width of the heat insulation element and the width of the trough generally corresponding to the thickness of the heat insulation element. 15. Method according to claim 14, wherein the height of the laminar filter material (8) perpendicular to its open side is about 0.3 to 1.5 times as great as the width of the trough. 16. Method according to claim 14, wherein the filter material (8) is inserted in the opening (6) of the filled film bag (1) in such a manner that the opening of the trough points outwardly towards the opening (6) of the film bag (1). 17. Method according to claim 11, wherein the laminar filter material (8) is inserted at a distance of at least 2 cm from the opening of the filled film bag in such a manner as to adapt the bag to closing and sealing the bag opening. 18. Method according to claim 17, wherein the filter material (8) is placed around a spacer (7), whose dimensions correspond to the width and thickness of the finished vacuum panel and introduced in the opening (6) of the film bag (1) together with the spacer (7). 19. Method according to claim 18, wherein the spacer comprises a bar-shaped spacer (7) of metal which is removed before placement in the vacuum chamber (13). 20. Method according to claim 18, wherein the spacer comprises an open-pored insulation material with a pressure load capacity of at least 20 kPa at 10% compression. 21. Method according to claim 20, wherein the spacer (7) comprises a selected one of a compressed silica powder and an open-pored foam and remains in the vacuum panel. 22. Method according to claim 20, wherein the spacer (7) is provided with holes extending in a direction perpendicular to the cross section of the bag opening (6) and having a diameter of 1 mm to 5 mm. 23. Method according to claim 18, wherein the filter material (8) and the spacer (7) are joined as an abutment from the outside with a sealing device (12), a sealing surface being on the internal face of the film bag (1). 24. Method according to claim 23, wherein the filter material (8) is joined using the sealing device (12) with the interior sealing layer of the film (2), at a width of 5 mm to 10 mm. 25. Method according to claim 1, wherein the filter material (8) is bonded to the internal face of the film bag (1). 26. Method according to claim 1, wherein the filter material (8) comprises a polyester nonwoven fabric, and is joined by means of a laminar adhesive material (9) comprising a polyolefin adhesive fabric, under the influence of temperature, with an interior sealing layer of the film bag (1). 27. Method according to claim 13, wherein the filter material (8) of the folded strips, is sealed on at least two sides with a sealing layer of the film bag (1), sealing seam(s) running along an open side of the folded strip. 28. Method according to claim 27, wherein one or more surface areas of the film bag (1), not sealed with the film strip, are compressed together with a clamp, such that no powder (4) can escape. 29. Method according to claim 28, wherein the clamp is removed after the film bag (1) is evacuated and sealed in a vacuum chamber (13). 30. Method according to claim 25, wherein the bonded filter portion (8) forms a cuboid-shaped interior volume with the film bag (1) in which the powder (4) is adapted to distribute itself. 31. Method according to claim 30, wherein the powder (4) is molded into a desired shape by vibration and compression after the filter material (8) is fixed to the internal face of the film bag (1) such that the bag's interior is sealed off in a powder-tight manner. 32. Method according to claim 29, wherein the evacuated and sealed film bag (1) is molded into the desired shape by vibration and compression in the vacuum chamber (13). 33. Method according to claim 31, wherein the powder (4) is molded into the desired shape by vibration and compression after the filter material (8) is fixed to the internal face of the film bag (1) such that the bag's interior is sealed off in a powder-tight manner and after the film bag (1) is evacuated. 34. Method according to claim 33, wherein the powder (4) in the film bag (1) is compressed to a density of 180 to 220 kg/m3. 35. Method according to claim 34, wherein structures are embossed on a surface of the film bag (1) filled with powder (4) during the compressing.

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