WO1993004242A1 - A mineral fibre element and a process for the production of such element - Google Patents

A mineral fibre element and a process for the production of such element Download PDF

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Publication number
WO1993004242A1
WO1993004242A1 PCT/DK1992/000243 DK9200243W WO9304242A1 WO 1993004242 A1 WO1993004242 A1 WO 1993004242A1 DK 9200243 W DK9200243 W DK 9200243W WO 9304242 A1 WO9304242 A1 WO 9304242A1
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WO
WIPO (PCT)
Prior art keywords
binder
mineral fibre
fibre element
element according
sheet material
Prior art date
Application number
PCT/DK1992/000243
Other languages
French (fr)
Inventor
Kim Brandt
Original Assignee
Rockwool International A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rockwool International A/S filed Critical Rockwool International A/S
Publication of WO1993004242A1 publication Critical patent/WO1993004242A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like

Definitions

  • the present invention relates to a mineral fibre element in particu- lar for use in the production of an insulating layer with a rein ⁇ forced surface.
  • DK-B-131952 describes a process for the production of insulating separating walls of mineral wool blocks wherein the mineral wool blocks are dipped into liquid gypsum plaster wherein their surfaces are covered completely with gypsum plaster before they are combined to a wall and wherein the gypsum plaster is subsequently allowed to harden so as to form a plaster shell on said wall. It is stated that an insulating wall is obtained which is highly fire-retardant and has high sound insulating capacity.
  • the binder-containing mineral fibre elements are preferably produced by sucking a fine dry activable binder into the surface of the mineral fibre elements.
  • the interaction ' between the binder layer incorporated into the surface mineral fibre element and the sheet material embedded in the second binder results partly in an increase of the point load resistance of the surface-reinforced mineral fibre element and partly in an increase of its punching strength and in particular its punching strength under dynamic influence.
  • the latter property is of major importance when using the mineral fibre elements to form an insulating roof covering or a facade covering which is thus capable of resisting mechanical influence, such as walking, bumps and blows.
  • the amount of binder can be reduced.
  • the amount of binder in the cement-reinforced mineral fibre boards can be reduced by 20-50% while maintaining the same or even improving the mechanical proper ⁇ ties.
  • the presence of the sheet material in the surface layer also improves the bending strength of the element. This is of particular importance when using mineral fibre elements constructed from lamellae of a direction of fibre orientation which is approximately perpendicular to the main surfaces of the elements. In the absence of a reinforcement of the surface layer with a sheet material there is a propensity to crevice formation at the corners of such mineral fibre elements. Thus the sheet material results in an increase of the corner and edge strengths of the elements.
  • the sheet material is preferably selected from the group consisting of non-woven materials, woven materials and meshes.
  • the weight of the sheet material is preferably between 10 and 100 g/m z , more preferably 20-50 g/m 2 and most preferably 30-50 g/m 2 .
  • the sheet material consists of organic or combinations of organic and inorganic fibres but inorganic fibres, such as glass fleeces, may also be used alone.
  • suitable organic fibres are polyester or polypropylene fibres.
  • An example of inorganic fibres is glass fibres.
  • a sheet material wholly or partially consisting of non-woven material provided, however, that it has a reasonable tensile strength, i.e. preferably a tensile strength of between 20 and 600 N/5 cm, more preferably 20-300 N/5 cm and most preferably 20-100 N/5 cm in the machine direction as well as in the cross machine direction.
  • the woven material it is preferred to use a glass cloth or a glass mat.
  • the woven material has a weight of between 60 og 150 g/m 2 .
  • the woven material may be coated, e.g. with plastics.
  • meshes made from organic compositions such as polyester or polypropylene or from inorganic material such as glass fibres.
  • the meshes may be coated, if convenient.
  • reinforcing fibres e.g. glass fibres as such, may be used as the reinforcing material embedded or incorporated into the second binder.
  • the two binders may be different but it is particularly preferred that the binder which is incorporated into the surface layer of the mineral fibre element and the one in which the sheet material is embedded are identical.
  • the surface layer of the mineral fibre element into which the first binder is incorporated is preferably of a thickness of at least 5 mm and more preferred of between 7 and 15 mm.
  • Preferred binders comprise hydraulic binders, such as cement, plaster, lime and pozzolanic substances.
  • hydraulic binders such as cement, plaster, lime and pozzolanic substances.
  • plastic binders and in particular thermo-setting plastic binders may also be used.
  • the binder should conveniently contain one or more additives.
  • additives are setting accelerators, pigments, water-repelling agents, such as silicone and wax, catalysts as well as adhesion promoters, such as polyvinylacetate and acrylic compounds.
  • a further preferred binder is Portland cement and when used Portland cement should preferably constitute an amount of 2-15 kg/m 2 .
  • Portland cement As the second binder it should preferably constitute 0.5-2.5 kg/m- after setting, and more preferably 0.5-1.5 kg/m 2 .
  • the density of the mineral fibre element is preferably between 50 and 180 kg/m 3 and it is preferably a conventional mineral fibre element, i.e. an element of mineral fibres which are bonded to each other by means of a thermo-setting binder, such as a phenol for al - dehyde binder.
  • the mineral fibres are preferably rock wool fibres but elements of other types of synthetic inorganic fibres, such as glass fibres and slag fibres, may also be used.
  • the mineral fibre element may also be composed of adjacent lamellae wherein the fibres are predominantly oriented in a direction which is substantially perpendicular to the main surfaces of the element.
  • the lamellae may be interconnected or held together by the sheet material embedded in the second binder.
  • the invention further relates to a process for the production of a mineral fiber element as described above.
  • the process is characterized in that a dry particulate activable first binder is sucked into the surface of a mineral fibre element, that the activable binder is activated, that the binder-containing surface layer is coated with a sheet material, that the sheet material is coated with a layer of activated second binder and that the binders are allowed to set.
  • the process results in a surface-reinforced mineral fibre element having a particularly low dela ination tendency and a high strength and in particular as to corner and edge strengths.
  • the binder-containing surface layer is coated with a layer of activated binder before as well as after application of the sheet material .
  • the sucking of dry particulate activable binder into the surface of the mineral fibre element is preferably carried out according to the process described in International Patent Application No. PCT/DK91/00071.
  • a hydraulic binder is preferably used to form the surface layer sucked into the mineral fibre element and to form the second binder- containing layer or layers.
  • the latter layer is preferably applied in the form of an aqueous slurry (paste).
  • the activation of the first binder may be effected in different ways depending on the nature of the binder.
  • the first binder is a hydraulic binder, such as cement, plaster, lime and pozzolanic substances the binder is activated by adding an aqueous medium to the surface layer.
  • the activation of the first hydraulic binder is conveniently effected by spraying water onto the surface layer or by treating the surface layer with a mixture of water and water vapour thereby accelerating the setting of the first hydraulic binder.
  • the mineral fibre elements according to the invention are particu ⁇ larly suitable for use in the production of an insulating layer having a reinforced surface by combination of several such elements. Preferred processes for the production of such insulating layers are described in International Patent Application No. PCT/DK91/00071.
  • First and second binder Portland cement
  • Total binder content 6 kg/m 2 (set) Sheet materi al Non-woven polyester materi al ( Freudenberg Lutradur PE 7230)
  • the mi neral fi bre el ements are produced i n the fol l owi ng manner :
  • the starting material used for the mineral fibre element was a lamella board containing a phenol formaldehyde binder, which lamella board was made from interconnected lamellae to obtain the sheet dimensions 100 x 1200 x 600 mm.
  • the lamellae were produced from Rockwool ® rock wool fibres and had a density of 100 kg/m 3 and an ignition loss of 3.5%.
  • the first binder was added to the starting material in the form of dry Portlaffd cement in an amount of 4 kg/m 2 , the Portland cement being sucked into the surface of the starting material (the lamella board) in the manner described in the Applicant's International Patent Application No. PCT/DK91/00071.
  • the Portland cement sucked into the surface was activated by spray ⁇ ing water in an amount of 1.5 kg/m 2 onto the surface.
  • the setting of the binder present in the surface of the lamella board was then effected by maintaining the impregnated lamella board reinforced with the non-woven material at a slightly elevated temperature and in a humid atmosphere (40°C, 90% R.F.) for seven days and nights.
  • a mineral fibre element of the same type as the element described above was produced, however, without non-woven material and second binder but with an amount of (first) binder of 9 kg/m 2 (set).
  • the first mineral fibre element is refer ⁇ red to as “Product A” whereas the mineral fibre element without non-woven material is referred to as "Product B”.
  • the insulation value of the product according to the invention is clearly improved as compared to the corresponding product without non-woven material .
  • the point load resistance was ' measured as walkability determined with a 50 mm puncher having a punching speed of 7 mm/min.
  • the point load resistance was measured for 4 different mineral fibre element products of the lamella type, cf. below:
  • Lamella element to which a pressure distributing sheet was adhered (180 kg/m 3 ), 20 mm 154
  • Fig 1 is a mineral fibre board seen from above, and
  • Fig 2 is a blow-up sectional view according to the line 11-11 of the mineral fibre board according to Fig 1.
  • FIG. 1 denotes a mineral fibre board provided with a surface layer 2 containing a set binder.
  • the surface of the mineral fibre board 1 is coated with a sheet material 3 embedded in a layer 4 of a set binder.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Laminated Bodies (AREA)
  • Building Environments (AREA)

Abstract

A mineral fibre element comprising a layer (2) of a first binder incorporated into the surface thereof, said layer (2) being coated with a sheet material (3) embedded in a layer (4) of a second binder. The binders may be hydraulic binders as cement or plaster.

Description

A MINERAL FIBRE ELEMENT AND A PROCESS FOR THE PRODUCTION OF SUCH ELEMENT
The present invention relates to a mineral fibre element in particu- lar for use in the production of an insulating layer with a rein¬ forced surface.
DK-B-131952 describes a process for the production of insulating separating walls of mineral wool blocks wherein the mineral wool blocks are dipped into liquid gypsum plaster wherein their surfaces are covered completely with gypsum plaster before they are combined to a wall and wherein the gypsum plaster is subsequently allowed to harden so as to form a plaster shell on said wall. It is stated that an insulating wall is obtained which is highly fire-retardant and has high sound insulating capacity.
The production of a shell on a wall made from such mineral fibre elements by dipping of the elements into gypsum plaster presents a number of practical problems. Firstly, the known process requires the setting-up on the construction site of plaster-filled vessels of a sufficient size for the mineral fibre elements to be immersed into the plaster and, secondly, the transportation of the elements covered with gypsum plaster from the vessel to the site of use as well as the construction of walls with the wet elements will give rise to a number of handling problems including spillage of gypsum plaster and soiling of the transportation equipment and the persons who construct the wall.
International patent application No. -PCT/DK91/00071 discloses a process for the production of an insulating layer with a reinforced surface wherein mineral fibre, elements coated on one or more sur¬ faces and in a zone bordering on said surface contain an activable binder, are combined to form an insulating layer and wherein the binder is activated. According to a preferred embodiment of said process, mineral fibre elements containing a hydraulic binder, preferably cement, are used and the activation of the binder is carried out either on the the site of production to form reinforced elements which are combined on the site of use to form an insulating layer or on the the site of use after the binder-containing mineral fibre sheets have been combined to form an insulating layer. Thus, in the latter case the reinforced surface is not produced until the hydraulic binder has set.
The binder-containing mineral fibre elements are preferably produced by sucking a fine dry activable binder into the surface of the mineral fibre elements.
Surprisingly it has now been found that by incorporting a first binder into the surface of the mineral fibre element and coating the binder-containing surface layer with sheet material embedded in a second binder, elements having surprisingly good properties regarding strength and/or binder content are obtained.
The interaction' between the binder layer incorporated into the surface mineral fibre element and the sheet material embedded in the second binder results partly in an increase of the point load resistance of the surface-reinforced mineral fibre element and partly in an increase of its punching strength and in particular its punching strength under dynamic influence. The latter property is of major importance when using the mineral fibre elements to form an insulating roof covering or a facade covering which is thus capable of resisting mechanical influence, such as walking, bumps and blows.
As an alternative to an increased strength the amount of binder can be reduced. Thus it has been found that the amount of binder in the cement-reinforced mineral fibre boards can be reduced by 20-50% while maintaining the same or even improving the mechanical proper¬ ties.
Such a reduction of the binder content results partly in lower production costs and partly in improved heat-insulating properties of the fibre elements, i.e. an improvement of the λ-value.
The presence of the sheet material in the surface layer also improves the bending strength of the element. This is of particular importance when using mineral fibre elements constructed from lamellae of a direction of fibre orientation which is approximately perpendicular to the main surfaces of the elements. In the absence of a reinforcement of the surface layer with a sheet material there is a propensity to crevice formation at the corners of such mineral fibre elements. Thus the sheet material results in an increase of the corner and edge strengths of the elements.
The sheet material is preferably selected from the group consisting of non-woven materials, woven materials and meshes.
In case of a fibrous non-woven material, the weight of the sheet material is preferably between 10 and 100 g/mz, more preferably 20-50 g/m2 and most preferably 30-50 g/m2.
Preferably the sheet material consists of organic or combinations of organic and inorganic fibres but inorganic fibres, such as glass fleeces, may also be used alone. Examples of suitable organic fibres are polyester or polypropylene fibres. An example of inorganic fibres is glass fibres.
It is preferred to use a sheet material wholly or partially consisting of non-woven material provided, however, that it has a reasonable tensile strength, i.e. preferably a tensile strength of between 20 and 600 N/5 cm, more preferably 20-300 N/5 cm and most preferably 20-100 N/5 cm in the machine direction as well as in the cross machine direction.
In case of woven material, it is preferred to use a glass cloth or a glass mat. Preferably, the woven material has a weight of between 60 og 150 g/m2. The woven material may be coated, e.g. with plastics.
In case of meshes, it is preferred to use meshes made from organic compositions such as polyester or polypropylene or from inorganic material such as glass fibres. The meshes may be coated, if convenient.
Moreover, it is contemplated that reinforcing fibres, e.g. glass fibres as such, may be used as the reinforcing material embedded or incorporated into the second binder.
The two binders may be different but it is particularly preferred that the binder which is incorporated into the surface layer of the mineral fibre element and the one in which the sheet material is embedded are identical.
The surface layer of the mineral fibre element into which the first binder is incorporated is preferably of a thickness of at least 5 mm and more preferred of between 7 and 15 mm.
Preferred binders comprise hydraulic binders, such as cement, plaster, lime and pozzolanic substances. However, plastic binders and in particular thermo-setting plastic binders may also be used.
In case of a hydraulic binder, the binder should conveniently contain one or more additives. Examples of such additives are setting accelerators, pigments, water-repelling agents, such as silicone and wax, catalysts as well as adhesion promoters, such as polyvinylacetate and acrylic compounds.
A further preferred binder is Portland cement and when used Portland cement should preferably constitute an amount of 2-15 kg/m2.
When using Portland cement as the second binder it should preferably constitute 0.5-2.5 kg/m- after setting, and more preferably 0.5-1.5 kg/m2.
The density of the mineral fibre element is preferably between 50 and 180 kg/m3 and it is preferably a conventional mineral fibre element, i.e. an element of mineral fibres which are bonded to each other by means of a thermo-setting binder, such as a phenol for al - dehyde binder.
The mineral fibres are preferably rock wool fibres but elements of other types of synthetic inorganic fibres, such as glass fibres and slag fibres, may also be used.
In a conventional mineral fibre sheet the fibres are normally oriented parallel with the sheet plane.
However, the mineral fibre element may also be composed of adjacent lamellae wherein the fibres are predominantly oriented in a direction which is substantially perpendicular to the main surfaces of the element. The lamellae may be interconnected or held together by the sheet material embedded in the second binder.
When using mineral fibre elements of the lamella type a particularly good penetration depth of the binder is obtained and thereby a particularly good bonding of the reinforcing layer including the sheet material. Furthermore said fibre orientation increases the compression strength of the element.
The invention further relates to a process for the production of a mineral fiber element as described above.
The process is characterized in that a dry particulate activable first binder is sucked into the surface of a mineral fibre element, that the activable binder is activated, that the binder-containing surface layer is coated with a sheet material, that the sheet material is coated with a layer of activated second binder and that the binders are allowed to set.
The process results in a surface-reinforced mineral fibre element having a particularly low dela ination tendency and a high strength and in particular as to corner and edge strengths.
According to a preferred embodiment of the process described above the binder-containing surface layer is coated with a layer of activated binder before as well as after application of the sheet material .
This results in a particularly. good bonding of the sheet material to the mineral fibre element.
The sucking of dry particulate activable binder into the surface of the mineral fibre element is preferably carried out according to the process described in International Patent Application No. PCT/DK91/00071.
A hydraulic binder is preferably used to form the surface layer sucked into the mineral fibre element and to form the second binder- containing layer or layers. The latter layer is preferably applied in the form of an aqueous slurry (paste). The activation of the first binder may be effected in different ways depending on the nature of the binder. When the first binder is a hydraulic binder, such as cement, plaster, lime and pozzolanic substances the binder is activated by adding an aqueous medium to the surface layer. The activation of the first hydraulic binder is conveniently effected by spraying water onto the surface layer or by treating the surface layer with a mixture of water and water vapour thereby accelerating the setting of the first hydraulic binder.
The mineral fibre elements according to the invention are particu¬ larly suitable for use in the production of an insulating layer having a reinforced surface by combination of several such elements. Preferred processes for the production of such insulating layers are described in International Patent Application No. PCT/DK91/00071.
The invention will now be described more in detail with reference to the following example.
Example
Production of the mineral fibre element according to the invention
Mineral fibre elements having the following product characteristics were produced:
Mineral fibres: Rockwpol® rock wool fibres
Ignition loss: 3.5%
First and second binder: Portland cement
Total binder content: 6 kg/m2 (set) Sheet materi al Non-woven polyester materi al ( Freudenberg Lutradur PE 7230)
The mi neral fi bre el ements are produced i n the fol l owi ng manner :
The starting material used for the mineral fibre element was a lamella board containing a phenol formaldehyde binder, which lamella board was made from interconnected lamellae to obtain the sheet dimensions 100 x 1200 x 600 mm. The lamellae were produced from Rockwool® rock wool fibres and had a density of 100 kg/m3 and an ignition loss of 3.5%.
The first binder was added to the starting material in the form of dry Portlaffd cement in an amount of 4 kg/m2, the Portland cement being sucked into the surface of the starting material (the lamella board) in the manner described in the Applicant's International Patent Application No. PCT/DK91/00071.
The Portland cement sucked into the surface was activated by spray¬ ing water in an amount of 1.5 kg/m2 onto the surface.
As the second binder a mixture of Portland cement and water in a 1:1 ratio was used.
An amount of 0.4 kg/m2 of the Portland cement/water-mixture was applied to the board surface in a thin layer. The fibrous non-woven material having the dimensions 1200 x 600 mm (Freudenberg Lutradur PE 7230) was placed on top of the thin- layer of Portland cement/- water. Another thin layer of the Portland cement/water-mixture was subsequently applied to the non-woven material in an amount of 0.4 kg/m2.
The setting of the binder present in the surface of the lamella board was then effected by maintaining the impregnated lamella board reinforced with the non-woven material at a slightly elevated temperature and in a humid atmosphere (40°C, 90% R.F.) for seven days and nights. For comparison purposes a mineral fibre element of the same type as the element described above was produced, however, without non-woven material and second binder but with an amount of (first) binder of 9 kg/m2 (set).
In the following examples the first mineral fibre element is refer¬ red to as "Product A" whereas the mineral fibre element without non-woven material is referred to as "Product B".
Examination of mineral fibre elements
Measurement of insulation value
Measurement of the insulation value (λ) of Product A and Product B, respectively, in the form of sandwich elements of a thickness of 70 mm and 100 mm gave the following results:
Product thickness Product A Product B
70 mm 46 mW/m/K 54 mW/m/K
100 mm 44 mW/m/K 50 mW/m/K
Thus, the insulation value of the product according to the invention is clearly improved as compared to the corresponding product without non-woven material .
Measurement of point load resistance
The point load resistance was' measured as walkability determined with a 50 mm puncher having a punching speed of 7 mm/min.
The point load resistance was measured for 4 different mineral fibre element products of the lamella type, cf. below:
Mineral fibre element Point load resistance (kN/m2)
Product A 350
Product B 350
Lamella element to which a pressure distributing sheet was adhered, (180 kg/m3), 20 mm 154
Uncoated lamella element 25
It appears from the above results that the elements according to the invention (Product A) provide the same high point load resistance as Product B despite a reduced amount of binder (6 kg/m2 as compared to 9 kg/m2 - set).
Measurement of corner strength
Measurements of the corner strength were carried out for products A and B using the UEAtc test "Behaviour under concentric static loads at an unsupported point on the roof", Union Europeenne pour TAgrement technique dans la construction, described in "General Directive for the Assessment of Roof Insulation for Flat and Sloping Roofs", M.O.A.T. No. 28:83, section 4.1.5.2(2) (December 1983).
In the test the optimum force at 112 mm projected parts was deter¬ mined. The fol l owing resul ts were obtained :
Mi neral fi bre el ement Average optimum l oad
(N/ ( 100« 200) mm2 )
Product A 76 mm 610
Product B 76 mm 533
There is no significant difference between the results obtained for Product A and Product B, but the test shows that according to the invention the same high corner strength is obtained despite a reduced amount of binder (6 kg/m2 as compared to 9 kg/m2- set).
The invention will now be described in further detail with reference to the drawing wherein
Fig 1 is a mineral fibre board seen from above, and
Fig 2 is a blow-up sectional view according to the line 11-11 of the mineral fibre board according to Fig 1.
In the drawing 1 denotes a mineral fibre board provided with a surface layer 2 containing a set binder. The surface of the mineral fibre board 1 is coated with a sheet material 3 embedded in a layer 4 of a set binder.

Claims

C 1 a i s
1. Mineral fibre element particularly suitable for use in the production of an insulating. layer with a reinforced surface, c h a - r a c t e r i z e d in that it comprises a first binder incorpora¬ ted into the surface of the mineral fibre element, and that the binder-containing surface layer is coated with a sheet material incorporated into a second binder.
2. Mineral fibre element according to claim 1, c h a r a c t e r ¬ i z e d in that the sheet material is selected from the group consisting of non-woven materials, woven materials and meshes.
3. Mineral fibre element according to claim 2, c h a r a c t e r - i z e d in that the sheet material is a fibrous non-woven material which has a weight of between 10 and 100 g/m2.
4. Mineral fibre element according to claims 2 or 3, c h a r a c ¬ t e i z e d in that the sheet material consists of organic or combinations of organic and inorganic fibres.
5. Mineral -fibre element according to any one of claims 2 to 4, c h a r a c t e r i z e d in that the sheet material is wholly or partially non-woven and has a tensile strength of between 20 and 600 N/5 cm in the machine direction as well as in the cross machine direction.
6. Mineral fibre element according to any one of the preceding claims, c h a r a c t e r i z e d in that the first binder is identical to the second binder.
7. Mineral fibre element according to any one of the preceding claims, c h a r a c t e r i z e d in that both binders are hydrau¬ lic binders.
8. Mineral fibre element according to claim 7, c h a r a c ¬ t e r i z e d in that one or both binders contain(s) one or more additives selected from a group consisting of setting accelerators, pigments, water repelling agents, catalysts and adhesion promoters.
9. Mineral fibre element according to any one of the preceding claims, c h a r a c t e r i z e d in that the first and/or the second binder is cement, plaster, lime or a pozzolanic substance, in particular cement or plaster, more particularly cement.
10. Mineral fibre element according to any one of the preceding claims, c h a r a c t e r i z e d in that it has a density of from 50 to 180 kg/m3.
11. Mineral fibre element according to clair 10, c h a r a c t ¬ e r i z e d in that it is made from rock wool fibres.
12. Mineral fibre element according to any one of the preceding claims, c h a r a c t e r i z e d in that it is composed of ad- jacent lamellae having a dominant fibre orientation is substantially perpendicular to the main surfaces of the element.
13. Process for the production of a mineral fibre element according to claim 1, c h a r a c t e r i z e d in that a dry particulate activable first binder is sucked into the surface of a mineral fibre element, that the activable binder is activated, that the binder- containing surface layer is coated with a sheet material, that the sheet material is coated with a layer of activated second binder and that the binders are allowed to set.
14. Process according to claim 13, c h a r a c t e r i z e d in that a layer of activated binder is applied to the binder-containing surface layer prior to the application of the sheet material.
15. Process according to claim 13 or 14, c h a r a c t e r i z e d in that hydraulic binders are used.
PCT/DK1992/000243 1991-08-16 1992-08-14 A mineral fibre element and a process for the production of such element WO1993004242A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK146891A DK146891D0 (en) 1991-08-16 1991-08-16 MINERAL FIBER ELEMENT AND PROCEDURE FOR MANUFACTURE OF SUCH ITEM
DK1468/91 1991-08-16

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WO1993004242A1 true WO1993004242A1 (en) 1993-03-04

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DK (1) DK146891D0 (en)
LV (1) LV10123B (en)
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WO (1) WO1993004242A1 (en)

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WO2020201449A3 (en) * 2019-04-05 2020-11-19 Rockwool International A/S Insulation element for thermal and/or acoustic insulation of a flat or flat inclined roof and method for producing an insulation element
WO2021197623A1 (en) * 2020-04-03 2021-10-07 Rockwool International A/S Roofing system and insulation element for a flat roof or a flat inclined roof
RU2794979C1 (en) * 2019-04-05 2023-04-26 Роквул Интернейшнл А/С Insulation element for thermal and/or sound insulation of flat or flat sloped roof and method of manufacturing the insulation element
US11690332B2 (en) 2020-04-03 2023-07-04 Rockwool A/S Method of growing plants

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DE1901206A1 (en) * 1968-01-11 1969-11-06 Incentive Aktiebolag Disc or plate-shaped component
DK131952B (en) * 1971-07-19 1975-09-29 Bojsen Moller Paper & Trading Insulating non-load-bearing partition or partition part and a method of manufacturing such walls or wall parts.
DE3021499A1 (en) * 1979-06-08 1980-12-11 Bpb Industries Ltd COMPONENTS
GB1587270A (en) * 1976-10-29 1981-04-01 Rockwool Lapinus Bv Insulating board of mineral wood
DE3315901A1 (en) * 1983-05-02 1984-11-08 Deutsche Heraklith Ag, 8346 Simbach Multi-layer lightweight construction board
GB2177048A (en) * 1985-06-01 1987-01-14 Saint Gobain Isover Mineral fibre insulating laminates
WO1991014059A1 (en) * 1990-03-08 1991-09-19 Rockwool International A/S Method of producing an insulating layer, element for use in the method and method of producing such element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1901206A1 (en) * 1968-01-11 1969-11-06 Incentive Aktiebolag Disc or plate-shaped component
DK131952B (en) * 1971-07-19 1975-09-29 Bojsen Moller Paper & Trading Insulating non-load-bearing partition or partition part and a method of manufacturing such walls or wall parts.
GB1587270A (en) * 1976-10-29 1981-04-01 Rockwool Lapinus Bv Insulating board of mineral wood
DE3021499A1 (en) * 1979-06-08 1980-12-11 Bpb Industries Ltd COMPONENTS
DE3315901A1 (en) * 1983-05-02 1984-11-08 Deutsche Heraklith Ag, 8346 Simbach Multi-layer lightweight construction board
GB2177048A (en) * 1985-06-01 1987-01-14 Saint Gobain Isover Mineral fibre insulating laminates
WO1991014059A1 (en) * 1990-03-08 1991-09-19 Rockwool International A/S Method of producing an insulating layer, element for use in the method and method of producing such element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020201449A3 (en) * 2019-04-05 2020-11-19 Rockwool International A/S Insulation element for thermal and/or acoustic insulation of a flat or flat inclined roof and method for producing an insulation element
RU2794979C1 (en) * 2019-04-05 2023-04-26 Роквул Интернейшнл А/С Insulation element for thermal and/or sound insulation of flat or flat sloped roof and method of manufacturing the insulation element
WO2021197623A1 (en) * 2020-04-03 2021-10-07 Rockwool International A/S Roofing system and insulation element for a flat roof or a flat inclined roof
US11690332B2 (en) 2020-04-03 2023-07-04 Rockwool A/S Method of growing plants

Also Published As

Publication number Publication date
AU2472792A (en) 1993-03-16
SI9200174A (en) 1993-03-31
LV10123A (en) 1994-05-10
LV10123B (en) 1995-02-20
DK146891D0 (en) 1991-08-16

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