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1. (WO2005068574) PROCEDE DE FABRICATION DE PANNEAUX DE LAINE MINERALE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS
I . A method of bonding together the surfaces of two elements formed of mineral fibre, comprising applying an adhesive to one or both of the surfaces to be bonded together, wherein the adhesive is a hot melt adhesive.
2. A method according to claim 1 in which the adhesive is applied to one or both of the surfaces to be bonded by spraying and the spraying time is not more than 12 seconds.
3. A method according to claim 1 or claim 2 in which the adhesive is applied to one or both of the surfaces to be bonded and the two elements are then pressed together to bond the surfaces together, wherein the total time for application of the adhesive and the pressing is not more than 12 seconds.
4. A method according to any preceding claim in which the adhesive is at a temperature of from 150 to 185°C on application.
5. A method according to any preceding claim in which the hot melt adhesive is a polyolefin-based hot melt adhesive.
6. A method according to any preceding claim in which the hot melt adhesive has a melting point of from 50 to 200°C, preferably 80 to 120°C, more preferably about 100°C.
7. A method according to any preceding claim in which the hot melt adhesive has a viscosity of from 2600 to 3000 mPa.s at 70°C.
8. A method according to any preceding claim in which adhesive is applied to both of the surfaces to be bonded.
9. A method according to any preceding claim which is a method of bonding together three mineral fibre elements.
10. A method according to any preceding claim in which the slabs are provided by being cut from a mineral fibre web such that the mineral fibres forming the elements are oriented predominantly parallel to the surfaces to be bonded.
I I . Use of the product of the method of any of claims 1 to 10 as an insulation panel.

12. Use according to claim 11 wherein the insulation panel is applied to a surface to be insulated and the bonded surfaces in the panel are perpendicular to the surface to be insulated, such that the fibres in the panel are predominantly perpendicular to the surface to be insulated.
13. A method of forming a mineral wool insulation panel comprising
providing a web of mineral wool having a top face and a bottom face and two opposing side faces and a first end defining the width of the web and a longitudinal direction parallel to the top and bottom faces and side faces and a transverse direction parallel to the top and bottom faces and perpendicular to the side faces,, and a thickness between the top and bottom faces,
cutting at least two elements from the web, the cut being made substantially in the transverse direction, so that the top and bottom faces of each element are formed from the top and bottom faces of the web,
bonding the at least two elements together with the top face of one element being bonded to the bottom face of the other element,
and packaging the resulting insulation panel without performing any further cutting operations.
14. A method according to claim 13 in which the two elements are bonded together with a hot melt adhesive.
15. A method according to claim 13 or claim 14 in which bonding is carried out using any of the features recited in claims 2 to 4 and 8.
16. A method according to claim 14 in which the adhesive has any of the eatures recited in claims 5 to 7.
17. A method of forming a mineral wool insulation panel comprising providing a web of mineral wool having a top face and a bottom face and two opposing side faces and a first end defining the width of the web and a longitudinal direction parahel to the top and bottom faces and side faces and a transverse direction parallel to the top and bottom faces and perpendicular to the side faces, and a thickness between the top and bottom faces, cutting at least two elements from the web, the cut being made in the transverse direction, so that the top and bottom faces of each element are formed from the top and bottom faces of the web,
bonding two elements together with the top face of one element being bonded to the bottom face of the other element to form a pre-panel,
and cutting from the pre-panel at least one insulation panel comprising parts of at least two elements and having a predetermined thickness in which the thickness direction of the insulation panel is parallel to the bonded surfaces of the elements forming the pre-panel.
18. A method of forming a mineral wool insulation panel comprising
providing a web of mineral wool having a top face and a bottom face and two opposing side faces and a first end defining the width of the web and a longitudinal direction parallel to the top and bottom faces and side faces and a transverse direction parallel to the top and bottom faces and perpendicular to the side faces, and a thickness between the top and bottom faces,
cutting at least two elements from the web, the cut being made substantially in the transverse direction, so that the top and bottom faces of each element are formed from the top and bottom faces of the web,
bonding the at least two elements together with the top face of one element being bonded to the bottom face of the other element,
wherein bonding is carried out using a hot melt adhesive.
19. Use of an insulation panel produced according to claim 13 or claim 17 or claim 18 as an insulation panel on a surface to be insulated, wherein the insulation panel is applied to the surface to be insulated so that the bonded surfaces of the elements forming the insulation panel are perpendicular to the surface to be insulated, whereby the mineral fibres in the insulation panel are predominantly perpendicular to the surface to be insulated.
20. A method according to claim 13 or claim 17 or claim 18 in which the insulation panel is formed by bonding three elements.

21. A method according to claim 13 or claim 17 or claim 18 in which the thickness of the web is at least 10 cm, preferably at least 20 cm.
22. A method according to claim 18 in which bonding is carried out using any of the features recited in claims 2 to 4 and 8.
23. A method according to claim 18 in which the adhesive has any of the features recited in claims 5 to 7.
24. A process for manufacturing panels of mineral wool comprising a step of producing a web of mineral wool with fibres arranged parallel to the plane of the non-woven fabric, cutting off elements therefrom, and then bonding the so-cbtained elements together, characterized in that a web of mineral non-woven fabric is obtained having a maximal technologically obtainable width of 20 cm, then a strip is cut off therefrom, said strip having a width corresponding to a required final panel length, the so-obtained strips are bonded together by the largest surfaces, the bonding being effected by gluing with the use of a layer of hot adhesive sprayed on one or both bonded surfaces at a temperature of 150-185°C, said adhesive being a thermofusible polyolefin-based adhesive having fusing point of about 100°C and working viscosity of 2600-3000 mPa.s (at 170°C), used in the amount of 1.0 - 5.0 g, preferably 2.0-3.5 g per one glue line 1.2 m long, and then the panels sprayed with the adhesive are pressed together, the maximum time of spraying and adhesive setting being 12 seconds, and the so-obtained panels are cut into strips of thickness corresponding to the insulation thickness, said cutting being performed along the dimension corresponding to the length of the panel.
25. A process for manufacturing panels of mineral wool comprising a step of producing a web of mineral non-woven fabric in which fibres are arranged parallel to the plane of the non-woven fabric, cutting off elements therefrom, rotating 'hem by

90°, and then bonding the so-obtained elements together, characterized in that a web of mineral non-woven fabric is obtained having a maximal technologically obtainable width of 20 cm, then a strip is cut off therefrom lengthwise, said strip having a width corresponding to a required final panel length, the so-obtained strip iε rotated in horizontal plane by 90°, and strips are cut off therefrom, said strips having a width corresponding to a final thickness of insulating layer, the so-obtained strips are rotated again by 90°, said rotation being effected about the longitudinal axis of the cut-off strip, and then the strips are bonded together, the bonding being effected by gluing with the use of a layer of hot adhesive sprayed on one or all bonded surfaces, at a temperature of 150-185°C, said adhesive being a thermofusible polyolefin-based adhesive having fusing point of about 100°C and working viscosity of 2600-3000 mPa.s (at 170°C), used in the amount of 2.0-3.5 g per one glue line 1.2 m long, and then the panels sprayed with the adhesive are pressed together, the maximum time of spraying and adhesive setting being 12 seconds.
26. A method according to claim 25 or claim 26, characterized in that the panel is formed of three strips.