EP0518964B1 - Systeme de production d'une couche isolante, appareil utilise a cette fin et procede - Google Patents

Systeme de production d'une couche isolante, appareil utilise a cette fin et procede Download PDF

Info

Publication number
EP0518964B1
EP0518964B1 EP91905881A EP91905881A EP0518964B1 EP 0518964 B1 EP0518964 B1 EP 0518964B1 EP 91905881 A EP91905881 A EP 91905881A EP 91905881 A EP91905881 A EP 91905881A EP 0518964 B1 EP0518964 B1 EP 0518964B1
Authority
EP
European Patent Office
Prior art keywords
binder
mineral fibre
insulating layer
surface zone
elements
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP91905881A
Other languages
German (de)
English (en)
Other versions
EP0518964A1 (fr
Inventor
Ian Cridland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwool AS
Original Assignee
Rockwool International AS
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
Priority claimed from DK60990A external-priority patent/DK60990D0/da
Application filed by Rockwool International AS filed Critical Rockwool International AS
Publication of EP0518964A1 publication Critical patent/EP0518964A1/fr
Application granted granted Critical
Publication of EP0518964B1 publication Critical patent/EP0518964B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
    • B28B19/003—Machines or methods for applying the material to surfaces to form a permanent layer thereon to insulating material
    • 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 method of producing an insulating layer having a reinforced surface zone, wherein a number of mineral fibre elements are combined to form such an insulating layer.
  • DE-C-258633 discloses a method of preparing plates from a hydraulic binder and fibres, such as asbestos fibres, wherein a stream of air containing a mixture of the hydraulic binder and the fibres is blown or sucked into a closed mould having air permeable walls so as to maintain the binder and the fibres therein and to allow air to escape and wherein the moulded article is subsequently compressed to form a plate.
  • a hydraulic binder and fibres such as asbestos fibres
  • DK patent publication No. 131952 discloses a method of producing insulating internal walls of mineral wool blocks wherein the mineral wool blocks are dipped into liquid gypsum plaster so that their surfaces are coated completely with gypsum plaster before they are combined to a wall, and wherein the gypsum is subsequently allowed to harden so as to form a plaster shell on each mineral wool block. It is stated that the insulating wall thus obtained is highly fire-retardant and has a high sound-insulating capacity but the mineral wool blocks as such are not reinforced.
  • the production of a shell on a wall made from such mineral fibre elements by dipping into gypsum plaster presents a number of practical problems.
  • the method requires the setting-up on the construction site of plaster-filled vessels having a sufficient size to allow the mineral fibre blocks to be immersed into the plaster, and secondly the transportation of the elements coated with gypsum plaster from the vessel to the site of use as well as the construction of the wall of the wet elements give rise to a number of handling problems, including spillage of gypsum plaster and soiling of transportation equipment and of the persons constructing the wall.
  • the object of the invention is to provide a commercially attractive method of preparing an insulating layer of the above-mentioned type with a strong integral surface zone.
  • this object is obtained with a method which is characterized in using mineral fibre elements each having a surface zone containing a particulate, dry activatable binder at an elevated concentration and in activating the binder to form an integral reinforced surface zone.
  • the production of the mineral fibre elements can be effected under optimum production conditions, which ordinarily means in a factory, and the elements can be transported to and stored at the site of use without any problems, no matter whether the binder is activated in the factory or in connection with the construction of the insulating layer.
  • the binder is activated at the site of use, i.e. during the formation of the insulating layer.
  • the activation of the binder during the formation of the insulating layer which means that the activation is effected either so shortly before the construction of the insulating layer that the binder is prevented from setting prior to the completion of the insulating layer, during the construction or following the completion of the construction, the very important technical advantage is obtained that during the construction the mineral fibre elements may be compressed to such an extent that no joints or only insignificant joints are formed between the elements. Furthermore, it is easier to form/cut the elements before the binder is activated.
  • the activation is effected before the mineral fibre elements are transported to the site of use and preferably in the factory during the production of the mineral fibre elements.
  • the amount of activatable binder contained in the mineral fibre element may vary within wide ranges and thus it may be adjusted to the desired properties of the final insulating layer.
  • the activation of the binder can be effected in different ways depending on the nature of the binder.
  • the mineral fibre elements comprise a hydralic binder, such as cement, gypsum, lime and pozzolanic substances
  • the binder is activated by supplying an aqueous medium to the elements.
  • the hydraulic binder is activated during the formation of an insulating layer, it is conveniently effected by applying water to the surface of the combined mineral fibre elements or by treating the surface with a mixture of water and water vapour, thereby accelerating the setting of the hydraulic binder.
  • the activation may also be effected immediately before the mineral fibre elements are combined to an insulating layer.
  • the aqueous medium used for activating the hydraulic binder may suitably contain one or more additives, e.g. one or more setting accelerators, pigments, hydrophobing agents, such as silicone or wax, and catalysts. Furthermore, adhesion improving additives, e.g. polyvinyl acetate or acrylic compounds, may be added.
  • additives e.g. one or more setting accelerators, pigments, hydrophobing agents, such as silicone or wax, and catalysts.
  • adhesion improving additives e.g. polyvinyl acetate or acrylic compounds, may be added.
  • the activation may be effected by blowing a stream of hot air towards the surface of the insulating layer or towards the surface of the individual mineral fibre elements or by subjecting the surface to the influence of hot heat waves, e.g. from a heating lamp.
  • the activation of the binder in a factory may suitably be carried out in the same manner as the activation on the site of use.
  • binder may vary within wide ranges and depends i.a. on the type of binder used and the desired reinforcement.
  • the binder When using quick-setting Portland cement the binder is preferably used in an amount of 2-15 kg/m2.
  • the mineral fibre element has a density of from 50 to 180 kg/m3 and it may consist of a conventional mineral fibre boards, i.e. boards of mineral fibres which are bonded together by means of a binder, such as phenol formaldehyde binder.
  • a binder such as phenol formaldehyde binder.
  • the mineral fibres are preferably rock wool fibres but glass fibres, slag fibres and similar fibres may also be used.
  • the fibres are ordinarily positioned in such a manner that they have a predominant fibre orientation which runs parallel with the board surface.
  • a mineral fibre board may also be composed of adjacent interconnected rod-shaped fibre elements (lamella), the fibres having a predominant fibre orientation which runs substantially perpendicularly to the board surface.
  • Mineral fibre elements of this type are particularly suitable for use in the method according to the invention as a particularly high penetration depth is obtained with such mineral fibre layers. Consequently it is possible to obtain a particularly satisfactory surface reinforcement. Furthermore, the fibre orientation mentioned above results in a considerable increase in the compression strength of mineral fibre elements of the same density.
  • the hydraulic binder is preferably Portland cement as this binder has a higher strength than a number of other prior art hydraulic binders.
  • the reinforced surface zone preferably has a thickness of at least 5 mm, and particularly preferred between 7 and 15 mm.
  • the reinforcement layer formed may optionally be post-treated, e.g. by water scouring or sack scouring, and/or by application of a surface coating, such as coat of paint or a further cement layer (of the type Cempexo®), or a thin coat of plaster, e.g. in an amount of 1-3 kg/m2.
  • a surface coating such as coat of paint or a further cement layer (of the type Cempexo®), or a thin coat of plaster, e.g. in an amount of 1-3 kg/m2.
  • the mineral fibre elements may conveniently be secured to the front by means of an adhesive, e.g. a cement adhesive, an asphalt adhesive or an acrylic adhesive.
  • an adhesive e.g. a cement adhesive, an asphalt adhesive or an acrylic adhesive.
  • the adhesive is preferably of the kind which is capable of bonding immediately after application and sets quickly.
  • the invention also relates to a mineral fibre element for use in the method described above, which element is characterized in that it has a surface zone containing a particulate, dry activatable binder at an elevated concentration.
  • the invention relates to a method of producing a mineral fibre element for use in the construction of an insulating layer of combined mineral fibre elements.
  • This method is characterized in that a gas stream containing a particulate, activatable dry binder is caused to pass through a mineral fibre element in such a manner that a binder-containing surface zone is formed on at least one surface of the mineral fibre element and in a zone adjoining this surface and that the activatable binder optionally is activated.
  • the production method set forth above ensures that a satisfactory and uniform penetration of the particulate binder into the mineral fibre element is obtained.
  • the method according to the invention is particularly suitable for the production of mineral fibre elements having a surface zone comprising a hydraulic binder, such as cement.
  • a further advantage of the method according to the invention is that it allows considerably larger amounts of binder to be introduced into a mineral fibre element than by a prior art wet method.
  • the point loading strength of the board thus produced (determined with a 0 ⁇ 25 mm mandrel having an impression velocity of 7 mm/min.) could be increased from about 400 N for a board produced by the wet method to more than 2000 N for a board produced by the method according to the invention.
  • an air stream is generated through the mineral fibre element by generating a sub-atmospheric pressure on the down-stream side of the element, thereby avoiding contamination of the environment with the solid binder.
  • the introduction of the solid particulate binder into the mineral fibre element can be effected under such conditions that the binder layer is deposited a distance below the surface, e.g. in a depth of more than 1-2 mm. In this manner it is prevented that the surface of the mineral fibre element is sealed by a subsequent activation of the binder and thus comprises a large number of protruding fibre ends.
  • the presence of the latter is of great importance in obtaining a satisfactory anchoring of a surface coating which may subsequently be applied, e.g. in the form of a coat of paint or an asphalt coating.
  • the method according to the invention allows the production of mineral fibre elements having a surface zone of set binder on both sides but ordinarily it will suffice to reinforce one surface.
  • the reinforced surface zone can be dyed, e.g. by use of a coloured binder.
  • a dust retaining agent e.g. polyglycol, glycerin, oil, wall paper paste and small amounts of water (20-100 g per m2), may be applied on the non-activated surface.
  • the rock wool boards were lamella boards, i.e. composed of adjacent lamella and having a predominant fibre orientation perpendicularly to the board surface.
  • the following boards were used: (1) an uncoated lamella board, (2) a lamella board which comprised a pressure distributing plate attached thereto by glueing and having a density of 180 kg/m3, a thickness of 20 mm and a binder content of 3.5 percent by weight, and (3) a lamella board having a 7 mm thick surface zone reinforced with set cement.
  • the point loading strenght obtained with the element produced by the method according to the invention is surprisingly high compared to that of the lamella board comprising a pressure distributing plate having a considerably larger thickness than the thickness of the cement layer.
  • the production of the binder-containing mineral fibre element may e.g. be carried out in an apparatus comprising a container having means for securing the mineral fibre element in the container in such a manner that said element forms a separating wall between the two chambers, said apparatus being provided with means for generating a gas stream through the mineral fibre element and means for supplying particulate, activatable binder to the container on the up-stream side of the mineral fibre element.
  • the means for producing a gas stream through the mineral fibre element preferably consist of an air pump, such as a centrifugal pump, the suction side of which is connected with the one chamber and the delivery side of which is connected with the other chamber.
  • the pump has a capacity which permits a pressure difference of 700-5000 mms to be established across the mineral fibre element.
  • the pressure difference is preferably adjusted so that a binder-containing surface zone having a thickness of from 5 to 15 mm is formed.
  • FIG. 1 designates a container which is divided into two chambers 2 and 3 by a mineral fibre element 4 which is maintained in the container 1 by securing means (not shown).
  • the chamber 3 is connected with the suction side of an air pump 6 through a pipe 5 and the delivery side of said pump is connected with the chamber 2 through a pipe 7.
  • an air distribution grid 8 is provided which serves to distribute the air uniformly over the cross section of the chamber 2.
  • the apparatus 1 further comprises a supply pipe 10 provided with a cell wheel 9 for particulate, activatable binder. Finally an air vent 11 is connected with the pipe 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Ceramic Capacitors (AREA)
  • Formation Of Insulating Films (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Television Signal Processing For Recording (AREA)
  • Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Details Of Aerials (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Building Environments (AREA)
  • Insulating Bodies (AREA)

Claims (9)

  1. Un procédé de production d'une couche isolante présentant une zone de surface renforcée, dans lequel un certain nombre d'éléments en fibres minérales sont combinés pour former une telle couche isolante, caractérisé par l'utilisation d'éléments en fibres minérales présentant chacun une zone de surface contenant un liant sec activable en particules suivant une concentration élevée, et par l'activation du liant pour former une zone de surface renforcée faisant partie intégrante des éléments.
  2. Un procédé selon la revendication 1, caractérisé en ce que le liant est activé lors de la formation de la couche isolante.
  3. Un procédé selon la revendication 1, caractérisé en ce que le liant est activé lors de la production des éléments en fibres minérales.
  4. Un procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un liant hydraulique est utilisé comme liant activable et en ce que l'activation est effectuée par l'addition d'eau.
  5. Un procédé selon la revendication 4, caractérisé par l'utilisation de ciment, de gypse, de chaux ou d'une substance pozzolanique comme liant activable.
  6. Un élément en fibres minérales à utiliser dans le procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une zone de surface contenant un liant sec activable en particules suivant une concentration élevée.
  7. Un élément en fibres minérales selon la revendication 6, caractérisé en ce qu'il est constitué à partir de lamelles de fibres minérales présentant une densité de 50 à 180 kg/m³.
  8. Un élément en fibres minérales selon la revendication 6 ou 7, caractérisé en ce que la zone de surface contient du ciment, du gypse, de la chaux ou une substance pozzolanique.
  9. Un procédé pour produire un élément en fibres minérales à utiliser dans la construction d'une couche isolante d'éléments en fibres minérales, caractérisé en ce qu'un courant de gaz contenant un liant sec activable en particules est amené à traverser l'élément en fibres minérales de telle manière qu'une zone de surface contenant du liant soit formée sur au moins une surface de l'élément en fibres minérales, et en ce que le liant activable est éventuellement activé.
EP91905881A 1990-03-08 1991-03-08 Systeme de production d'une couche isolante, appareil utilise a cette fin et procede Expired - Lifetime EP0518964B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK60990A DK60990D0 (da) 1990-03-08 1990-03-08 Fremgangsmaade til fremstilling af et isoleringslag med en forstaerket overflade, element til brug ved fremgangsmaaden samt fremgangsmaade til fremstilling af et saadant element
DK609/90 1990-03-08
DK2881/90 1990-12-04
DK288190A DK288190A (da) 1990-03-08 1990-12-04 Fremgangsmaade til fremstilling af et mineralfiberelement med en overfladezone omfattende et afbundet hydraulisk bindemiddel

Publications (2)

Publication Number Publication Date
EP0518964A1 EP0518964A1 (fr) 1992-12-23
EP0518964B1 true EP0518964B1 (fr) 1993-09-22

Family

ID=26064307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91905881A Expired - Lifetime EP0518964B1 (fr) 1990-03-08 1991-03-08 Systeme de production d'une couche isolante, appareil utilise a cette fin et procede

Country Status (11)

Country Link
EP (1) EP0518964B1 (fr)
AT (1) ATE94933T1 (fr)
AU (1) AU7488891A (fr)
CA (1) CA2077530A1 (fr)
DE (1) DE69100404T2 (fr)
DK (2) DK288190A (fr)
ES (1) ES2044728T3 (fr)
FI (1) FI923946A (fr)
LV (1) LV10124A (fr)
PL (1) PL166959B1 (fr)
WO (1) WO1991014059A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK146891D0 (da) * 1991-08-16 1991-08-16 Rockwool Int Mineralfiberelement og fremgangsmaade til fremstilling af et saadant element
CA2166166C (fr) † 1995-01-12 2006-07-18 Roy E. Shaffer Ensemble isolant et methode pour l'application d'un adhesif sur ledit isolant
GB9717484D0 (en) 1997-08-18 1997-10-22 Rockwool Int Roof and wall cladding

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE258633C (fr) *
US2510086A (en) * 1939-10-02 1950-06-06 Delloye Andre Laurent Camille Method of manufacturing insulating material
US2335722A (en) * 1941-03-13 1943-11-30 Raymond W Adams Cementitious product
DE2015301A1 (en) * 1970-03-31 1971-11-11 Technisch Ontwikkelingsbureau Van Elten N. V., Voorthuizen (Niederlande) Lightweight board of cemented organic fibres
DK131952C (da) * 1971-07-19 1976-02-23 Bojsen Moller Paper & Trading Isolerende ikke-berende skilleveg eller skillevegsdel samt fremgangsmade til fremstilling af sadanne vegge eller vegdele

Also Published As

Publication number Publication date
DE69100404D1 (de) 1993-10-28
CA2077530A1 (fr) 1991-09-09
DE69100404T2 (de) 1994-01-13
LV10124A (lv) 1994-05-10
FI923946A0 (fi) 1992-09-03
DK288190A (da) 1991-09-09
DK0518964T3 (da) 1994-04-18
DK288190D0 (da) 1990-12-04
PL166959B1 (pl) 1995-07-31
EP0518964A1 (fr) 1992-12-23
AU7488891A (en) 1991-10-10
WO1991014059A1 (fr) 1991-09-19
FI923946A (fi) 1992-09-03
ATE94933T1 (de) 1993-10-15
ES2044728T3 (es) 1994-01-01

Similar Documents

Publication Publication Date Title
JP4633732B2 (ja) 室内用壁板及びその製造方法
US3451842A (en) Method of impregnating a foamed plastic and the impregnated foamed plastic
EP2117828B1 (fr) Article cimentaire résistant à l'eau et procédé pour le préparer
US4303722A (en) Building components
CA2757262C (fr) Article cimentaire et son procede de preparation
MX2007013242A (es) Tabique para paredes interiores y metodo para elaborarlas.
JPS627146B2 (fr)
PL80205B1 (en) A process for the continuous production of molded bodies,especially of slabs,from plaster of paris[il32887d0]
EP0518964B1 (fr) Systeme de production d'une couche isolante, appareil utilise a cette fin et procede
US1966069A (en) Acoustic tile and method of manufacturing the same
GB2273100A (en) Intumescent products
GB2225599A (en) Cementitious Board
RU2109887C1 (ru) Способ получения изоляционного слоя, элемент для использования в способе и метод получения такого элемента
JP2983052B2 (ja) 建築用不燃ボードの製造法
JPH08300550A (ja) 軽量石膏硬化体
RU2344936C2 (ru) Стеновая плита для внутренних работ и способ ее производства
DE2257789A1 (de) Geformte gegenstaende aus alkalimetallsilikaten, die mit glasfasern verstaerkt sind
US3333656A (en) Fibrous acoustical panel with impregnant in rear body portion
WO1993004242A1 (fr) Element en fibre minerale et procede de production d'un tel element
JPS5924748B2 (ja) 結露防止性のすぐれたシ−ト状建築材料の製造法
JPS63107547A (ja) 施釉セメント質ハニカムパネル
US20020086173A1 (en) Polyvinyl acetate coating for strength improvement in a gypsum containing board
JPS5899185A (ja) 無機質系モルタル下地材
JPS629420B2 (fr)
JPS599325B2 (ja) 繊維シ−ト強化発泡石こうパネルの製造法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920905

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17Q First examination report despatched

Effective date: 19930127

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19930922

REF Corresponds to:

Ref document number: 94933

Country of ref document: AT

Date of ref document: 19931015

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 69100404

Country of ref document: DE

Date of ref document: 19931028

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2044728

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19940331

Year of fee payment: 4

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

EPTA Lu: last paid annual fee
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 91905881.8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19950315

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19950331

Year of fee payment: 5

Ref country code: NL

Payment date: 19950331

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19950428

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960309

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19960331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19960422

Year of fee payment: 6

BERE Be: lapsed

Owner name: ROCKWOOL INTERNATIONAL A/S

Effective date: 19960331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19961001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19961001

EUG Se: european patent has lapsed

Ref document number: 91905881.8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970227

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Effective date: 19970308

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980308

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990324

Year of fee payment: 9

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040309

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20051130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20090313

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090306

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101001