WO2021028677A1 - Coupe-feu - Google Patents

Coupe-feu Download PDF

Info

Publication number
WO2021028677A1
WO2021028677A1 PCT/GB2020/051912 GB2020051912W WO2021028677A1 WO 2021028677 A1 WO2021028677 A1 WO 2021028677A1 GB 2020051912 W GB2020051912 W GB 2020051912W WO 2021028677 A1 WO2021028677 A1 WO 2021028677A1
Authority
WO
WIPO (PCT)
Prior art keywords
fire barrier
barrier product
covering
front face
product according
Prior art date
Application number
PCT/GB2020/051912
Other languages
English (en)
Inventor
Neil HEFFERNAN
Original Assignee
Polyseam Limited
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 Polyseam Limited filed Critical Polyseam Limited
Publication of WO2021028677A1 publication Critical patent/WO2021028677A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent

Definitions

  • the present invention relates to fire barriers and to methods and uses relating thereto.
  • the invention relates to fire barriers for use in vented cavities.
  • Fire barriers are incorporated within cavities of a building’s structure in order to prevent air, moisture and fire from spreading between partitions or floors in a building. Such barriers commonly completely close the cavity. However in some instances cavities need to remain open to allow ventilation, drainage and/or access in normal service. This can cause significant issues in case of a fire as the fire can spread rapidly between floors and partitions in an uncontrolled manner.
  • barriers having ventilation strips or holes which are closable by an intumescent material are known.
  • the distance across which such materials can expand is limited due to the lack of support for the intumescent material.
  • the present invention seeks to provide an alternative fire barrier which offers advantages over some barriers of the prior art.
  • a fire barrier product for a cavity comprising a compressed expandable non-combustible material and a heat-frangible covering.
  • the fire barrier product of the first aspect of the present invention comprises a compressed expandable non-combustible material.
  • the material can exist in a compressed form or an expanded form.
  • the material exists in its expanded form in the absence of any force being applied to it. Thus removal of a compressive force immediately results in expansion of the material.
  • the compressed expandable non-combustible material may be selected from any suitable material that is able to be compressed and which does not burn.
  • the compressed expandable non-combustible material is selected from man made mineral fibres (MMMFs) and man made vitreous fibres (MMVFs).
  • MMMFs man made mineral fibres
  • MMVFs man made vitreous fibres
  • the compressed expandable non-combustible material is selected from one or more of mineral wool, mineral fibres, mineral cotton, vitreous fibres, stone wool, slag wool, glass wool, ceramic fibre, ceramic wool and other man made fibres.
  • the compressed expandable non-combustible material is thus suitably a fibrous material and the fibres are provided in a compressed state.
  • the compressed expandable non-combustible material may be coated by an intumescent composition.
  • the fire barrier product of the first aspect of the present invention does not comprise an intumescent material.
  • the fire barrier product of the first aspect further comprises a heat frangible covering.
  • heat frangible covering we mean that the covering breaks apart on application of heat.
  • the covering is provided around some or all of the compressed expandable noncombustible material.
  • the compressed expandable non-combustible material is fully or partially retained within the covering.
  • the covering is used to hold the compressed expandable non-combustible material in a compressed state.
  • the covering suitably applies a compressive force to the expandable non-combustible material.
  • the covering material must be sufficiently strong to hold the expandable non-combustible material in a compressed state under ambient conditions.
  • the compressed expandable non-combustible material is received in a bracket having an open front face and the heat frangible covering is fixed onto the bracket over the open front face of the bracket and over the compressed expandable non-combustible material, to hold the compressed expandable non-combustible material in the compressed state.
  • the bracket is suitably formed of a rigid fire-resistant material, for example steel.
  • the heat frangible covering may be wrapped around the bracket and the compressed expandable non-combustible material.
  • the covering may form a continuous loop around the bracket and the compressed expandable non-combustible material. Wrapping the heat frangible covering around the bracket in this way may simplify the manufacture of the fire barrier product, for example by using a shrink-wrapping technique.
  • a front face plate is arranged at the open front face of the bracket to bias the compressed expandable non-combustible material in the compressed state, wherein the heat frangible covering holds front face plate against the compressed expandable noncombustible material.
  • the front face plate may be formed of any suitable material which has sufficient rigidity to resist the outward force from the compressed expandable non-combustible material, for example a rigid polymeric material or steel.
  • the front face plate may be formed from the same material as the bracket, for example steel.
  • the heat frangible covering may be attached to the front face plate and the bracket in order to hold the front face plate in position and bias the compressed expandable non-combustible material in the compressed state.
  • the heat frangible covering breaks to release the front face plate from the bracket and allow the compressed expandable non-combustible material to expand as described above.
  • the heat frangible covering may be a tape or tapes attached to the front face plate and the bracket, where the front face plate and the bracket join together. Therefore the breakage of the tape or tapes releases the front face plate from the bracket and allows the compressed expandable non-combustible material to expand.
  • the heat frangible covering may be fixed onto the bracket over the front face of the bracket and over the front face plate, the front face plate being arranged over the compressed expandable non-combustible material, to hold the compressed expandable non-combustible material in the compressed state.
  • the heat frangible covering may be wrapped around the bracket and the front face plate.
  • the covering may form a continuous loop around the bracket, the front face plate and the compressed expandable non-combustible material.
  • any suitable material which breaks or degrades on heating may be used as the covering.
  • the covering is provided in the form of a film.
  • the covering is made from a flexible material.
  • the covering is not air or moisture sensitive.
  • the covering is not light sensitive.
  • the covering is chemically resistant.
  • the covering is made from a polymeric material.
  • Preferred polymeric materials include polyethylene (including high density polyethylene and low density polyethylene), polypropylene, polyvinyl chloride, vinyl polymers, polyethylene terephthalate (PET, PETE) and polystyrene.
  • One especially preferred covering material is low density polyethylene.
  • the covering is heat-frangible.
  • the covering melts on application of heat.
  • the covering is in the form of a film and melting following application of heat causes the film to break apart.
  • the covering is made from a material having a melting point of less than 300°C, preferably less than 250°C, more preferably less than 200°C, for example less than 180°C, less than 160°C or less than 140°C.
  • the covering is made from a material having a melting point of 70°C to 150°C, preferably 80°C to 130°C, for example 90°C to 120°C.
  • the fire barrier product of the first aspect is adapted to be fixed to a structure.
  • a structure may be a wall, a floor, a roof cantilever or a gable vent.
  • the structure may include a cavity for the purpose of ventilation, drainage or access.
  • the structure to which the fire barrier product fixed my be made from stone, concrete, brick, metal, wood, ceramic, glass, plastic or any combination thereof.
  • the cavity may be present internally or externally to a building.
  • the compressed expandable non-combustible material may be shaped to facilitate fixing to a wall.
  • the fire barrier product of the first aspect may comprise fixing means.
  • the fixing means may be attached to the compressed expandable non-combustible material to facilitate fixing the fire barrier to a wall or other structure.
  • separate fixing means may be used.
  • a kit comprising a fire barrier product of the first aspect and fixing means.
  • fixing means may be provided within the fire barrier product of the first aspect or separately as part of the kit of the second aspect. Any suitable means by which the fire barrier product can be attached to a wall or other structure can be used as a fixing means.
  • Such means include spikes, angles, shelves, brackets, channels, adhesives, screws, bolts or other fixings.
  • the fire barrier product of the present invention offers a number of advantages over products of the prior art. It is made of cheap, readily available materials.
  • a variety of conventional fixing means can be used to secure the fire barrier product of the first aspect in position.
  • a fire barrier product of the invention can be made in any size or shape and thus can be used in a wide variety of settings.
  • the barrier can be activated at much lower temperatures than prior art systems which rely on intumescent materials. This means that a barrier across a cavity is formed much sooner when a fire starts.
  • low density polyethylene suitable for use as a covering material has a melting point of 105°C whereas graphite based intumescent materials do not expand until temperatures of at least 150°C are reached.
  • the fire barrier product is made from a non-combustible material there is no increase in energy release due to the fire.
  • the materials used to made the fire barrier product of the present invention are suitably very durable and have a long service life. No maintenance is required after installation.
  • the fire barrier product of the invention can be used within cavities of external walls, including those exposed to the elements.
  • a third aspect of the present invention there is provided a method of forming a closure across a cavity, the method comprising fixing a fire barrier product of the first aspect within the cavity and heating the fire barrier product.
  • Figure 1 shows one example of how the product may be fitted within an open cavity
  • Figure 2 shows the product closing off the cavity in the event of a fire.
  • Figure 3 shows a side view of another embodiment of the fire barrier product of the present invention.
  • Figure 4 shows a side view of a further embodiment of the fire barrier product of the present invention.
  • Figure 1 shows a wall 1 fitted within cladding 2, with a cavity 3 therebetween.
  • a fire barrier product 100 comprising bracket 5 is fitted to the wall 1 with a suitable fixing.
  • the bracket 5 comprises a back plate 51 , an upper plate 52, a lower plate 53 and an open front face 54.
  • the fire barrier product comprises a compressed expandable non-combustible material in the form of mineral wool 6 in a compressed form held in place by a heat-frangible polyethylene covering 7.
  • the heat-frangible polyethylene covering 7 is attached to the bracket 5 at the upper and lower plates 52 and 53 by a suitable adhesive.
  • the mineral wool 6 is received and retained in the bracket 5 between the upper plate 52 and the lower plate 53, and the polyethylene cover 7 is attached to the bracket 5 across the open front 54 of the bracket 5 to bias the mineral wool 6 in the compressed form. Air can flow through the cavity (indicated 8).
  • Figure 3 shows an alternative fire barrier product 200 which is similar in structure and function to the fire barrier product 100 of figure 1 , aside from the heat-frangible covering 7 being wrapped around the bracket 5 and the compressed mineral wool 6, covering the back plate 51 , the upper plate 52, the lower plate 53 and the mineral wool 6 at the open front face 54 of the bracket 5.
  • the heat-frangible covering 7 forms a continuous loop and may be formed by known shrink-wrapping techniques.
  • the fire barrier product 200 functions as described above in relation to figure 2.
  • Figure 4 shows a further alternative fire barrier product 300 which is similar in structure and function to the fire barrier product 100 of figure 1 , aside from the addition of a front face plate 55 arranged between the upper plate 52 and the lower plate 53 of the bracket, closing the open front face 54.
  • the front face plate 55 is formed of steel, but can be formed of any suitable rigid material.
  • the front face plate 55 contacts the mineral wool 6 and holds it in place in the compressed form.
  • the front face plate 55 is itself held in place by the heat frangible cover 7 which is in the form of a heat-frangible polyethylene adhesive tape attached to the bracket 5 and the front face plate 55 where the upper and lower plates 52 and 53 meet the front face plate 55.
  • the fire barrier product 300 functions as described above in relation to figure 2, with the heat from a fire breaking the heat-frangible polyethylene adhesive tape 7 to release the front face plate 55 from the bracket 5 and allowing the compressed mineral wool 6 to expand into and block the cavity 3.
  • the heat-frangible polyethylene adhesive tape 7 may be replaced by a heat-frangible polyethylene covering 7 as shown in figure 1 or a heat-frangible covering 7 wrapped around the bracket 5 and the front face plate 55, similar to that shown in figure 3.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Building Environments (AREA)

Abstract

L'invention concerne un produit coupe-feu pour une cavité dans un bâtiment. Le produit coupe-feu comprend un matériau non combustible expansible comprimé et un revêtement frangible à la chaleur. L'exposition du produit coupe-feu à une chaleur suffisante, par exemple pendant un incendie, amène le revêtement cassant à la chaleur à se rompre ainsi le matériau non combustible expansible comprimé se dilate pour fermer la cavité et inhiber la propagation du feu. L'invention concerne également un procédé associé de formation d'une fermeture à travers une cavité dans un bâtiment.
PCT/GB2020/051912 2019-08-12 2020-08-11 Coupe-feu WO2021028677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1911519.5A GB201911519D0 (en) 2019-08-12 2019-08-12 Fire barrier
GB1911519.5 2019-08-12

Publications (1)

Publication Number Publication Date
WO2021028677A1 true WO2021028677A1 (fr) 2021-02-18

Family

ID=67991135

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2020/051912 WO2021028677A1 (fr) 2019-08-12 2020-08-11 Coupe-feu

Country Status (2)

Country Link
GB (1) GB201911519D0 (fr)
WO (1) WO2021028677A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007145A1 (fr) * 2021-07-30 2023-02-02 Polyseam Limited Barrière anti-feu
EP4332317A1 (fr) * 2022-09-05 2024-03-06 Service Precast Srl Système de protection coupe-feu pour une cavité de ventilation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060213138A1 (en) * 2005-03-24 2006-09-28 Royal Group Technologies Limited Fire barrier component
GB2562254A (en) * 2017-05-09 2018-11-14 Tremco Illbruck Coatings Ltd Fire-stopping product

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060213138A1 (en) * 2005-03-24 2006-09-28 Royal Group Technologies Limited Fire barrier component
GB2562254A (en) * 2017-05-09 2018-11-14 Tremco Illbruck Coatings Ltd Fire-stopping product

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023007145A1 (fr) * 2021-07-30 2023-02-02 Polyseam Limited Barrière anti-feu
GB2610482A (en) * 2021-07-30 2023-03-08 Polyseam Ltd Fire barrier
GB2610482B (en) * 2021-07-30 2023-10-11 Polyseam Ltd Fire barrier
EP4332317A1 (fr) * 2022-09-05 2024-03-06 Service Precast Srl Système de protection coupe-feu pour une cavité de ventilation

Also Published As

Publication number Publication date
GB201911519D0 (en) 2019-09-25

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