EP2412409A1 - Joints intumescents d'un seul tenant pour garantir l'étanchéité contre la fumée froide et chaude, en particulier pour registres coupe-feu - Google Patents

Joints intumescents d'un seul tenant pour garantir l'étanchéité contre la fumée froide et chaude, en particulier pour registres coupe-feu Download PDF

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Publication number
EP2412409A1
EP2412409A1 EP11175461A EP11175461A EP2412409A1 EP 2412409 A1 EP2412409 A1 EP 2412409A1 EP 11175461 A EP11175461 A EP 11175461A EP 11175461 A EP11175461 A EP 11175461A EP 2412409 A1 EP2412409 A1 EP 2412409A1
Authority
EP
European Patent Office
Prior art keywords
gasket
intumescent
intumescent material
central portion
gasket according
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.)
Withdrawn
Application number
EP11175461A
Other languages
German (de)
English (en)
Inventor
Federico Lo Cicero
Alberto Ripa
Marco Passerini
Thierry Jung
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.)
JT Finance
Posa SpA
Original Assignee
JT Finance
Posa SpA
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 JT Finance, Posa SpA filed Critical JT Finance
Publication of EP2412409A1 publication Critical patent/EP2412409A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/12—Hinged dampers

Definitions

  • the present invention relates to intumescent gaskets for hot smoke and also cold smoke sealing, particularly suitable for fire dampers.
  • Fire dampers are used in the compartmentalisation of fire-fighting zones in ventilation and/or air-conditioning systems and their purpose is to avoid the propagation of smoke in the air distribution channels during a fire by means of the closure of the respective blade mounted on said damper.
  • the closure of the blades generally takes place when a sensing member present thereon reaches the temperature of 72°C: however the intumescent gaskets mounted on the blade or in the immediate vicinity thereof generally ensure good hot smoke sealing, generally at temperatures higher than 110°C, thanks to the expansion of the intumescent material, but are not suitable for lower temperature smoke sealing.
  • the first gasket is suitable for fire damping and hot smoke sealing which is made up of a band (A) in intumescent material having a minimum expansion temperature of 120-200°C, which can also be covered by a profile (B) in plastic, rigid or semi-rigid;
  • the second gasket is suitable for cold smoke sealing which is made up, for example, of expanded polyurethane foam (C).
  • intumescent material in general intumescent graphite
  • PVC polymeric matrix
  • the incorporation of intumescent material in a polymeric matrix such as PVC results in a smaller expansion of the intumescent material at the time of use since it expands partially already during the incorporation and/or crosslinking of the tubular article, and therefore with lower fire damping performances.
  • the obtaining of flexible gaskets with smooth surface from said extrudable matrices is difficult and their combustion generates toxic fumes such as hydrochloric acid.
  • EP 2062617 describes a gasket for fire dampers formed by a band core made of intumescent material around which a flexible sheath is placed with an air gap for allowing the expansion of the intumescent material.
  • the sheath which limits the expansion of the intumescent material is formed by a flame-resistant woven material whose threads are covered with silicone to give the woven material flexibility and is fitted over the band of intumescent material.
  • intumescent gaskets cannot take on complex forms and geometries but can only have regular shapes given that the external covering is formed by a fabric.
  • the gasket in silicone or rubber described in DE 10 2009 000 618 and the sheath described in EP 2 062 617 are moreover made with a process which does not involve directly the intumescent material. They are applied or fitted around the intumescent material, to constitute with it a double gasket.
  • the object of the present invention is that of providing flexible and elastic gaskets for fire dampers suitable for being mounted on the blades of said dampers, or in the immediate vicinity, able to create a hot and cold smoke seal by means of a single body and which can be manufactured without causing the expansion, even only partial, of the intumescent material incorporated in them.
  • Another object of the present invention is that of providing such a gasket with smooth surface which is also practical, easy to make, economical and which can have an external covering of any form and geometry.
  • a further object of the present invention is to allow the making of fire dampers provided with sealing, also cold smoke sealing, without using fire gaskets formed by two different adjacent gaskets.
  • the object of the present invention is a single-body intumescent gasket formed by a band of intumescent material covered by a profile in silicone elastomer material (defined also as silicone rubber) having a smooth surface.
  • the intumescent material is incorporated as a band in a matrix of a silicone elastomer extrudable and crosslinkable without heat by means of UV rays.
  • the intumescent strip or band forms a single body with the covering made of silicone in that the intumescent material is internal and integral with said covering thanks to the fact that the latter is coextruded over the tumescent material.
  • the strip is non-removable in relation to the covering and removable from the gasket only by breaking said covering.
  • This single-body gasket is able to seal against both cold smoke thanks to the external profile in silicone crosslinkable without heat (i.e. without heat supplied as occurs for example in IR ovens, hot air ovens, UHF ovens, in molten salt baths, in autoclave) which can be made in any form and geometry complementary to the form of the seat, and against hot smoke thanks to the intumescent material contained inside said profile.
  • the gasket in accordance with the present invention is also suitable for air and water sealing.
  • intumescent material With intumescent material the intent here is to identify an incombustible material which reacts to high temperatures, expanding fast and ensuring a perfect sealing of the empty spaces against the hot smoke, such as for example expanded graphite, silicates and the like, preferably expandable graphite of flame-retardant grade.
  • Figure 1 shows a typical cylindrical fire damper for air-conditioning or ventilation ducts denoted by reference numeral 1.
  • the flow of air does not propagate in the duct whereon the fire damper 1 is mounted as illustrated by the curved tip arrows in Fig. 2 , once the blade 2 of the damper 1 is closed.
  • the blade 2 is mounted on a small shaft 3 around which said blade can rotate when driven by actuation means 4 ( Figs. 4a and 4b ).
  • each gasket 100 is housed in a respective cavity formed in the thickness of the blade 2 around its perimeter to allow the housing thereof, or can be stapled on the blade or on the perimeter of the duct made in aluminium.
  • the gasket 100 has an external profile with C shape in cross section, suitable for sealing when the gasket is mounted around the circular blade 2 ( Fig. 5 ): in cross section the external profile of this gasket 100 is formed by a central portion or body 101, substantially rectangular and hollow, such as to define a tubular seat 110 which houses internally the intumescent material 102.
  • two fins 103 extend integral with the central portion 101 which are suitable for cold smoke sealing against the walls 5 ( Figs. 3c and 3d ) of the fire damper 1 inserted in the duct (not illustrated).
  • the external profile is made in silicone crosslinkable without heat and the gasket is a single body since the various portions are continuous one with the other.
  • Said gasket 100 also has longitudinal incisions 104, preferably discontinuous, which encourage the breaking of the seat 110 of the intumescent material facilitating the release of said intumescent material 102 expanding in the case of increase of the temperature.
  • the siliconic material is coupled with the intumescent material so as to cover it entirely.
  • the gasket 100 in accordance with the invention is obtained by means of the coextrusion of a silicone elastomer around a layer of intumescent material.
  • Said layer can have any thickness and depends in part on the degree of expandibility of the intumescent material.
  • An example of suitable thickness can be a value comprised between 1.5 and 5.0 mm.
  • the coextrusion means that the external profile of the gasket constituted by the silicone elastomer is completely in contact with the intumescent material, adhering thereto without leaving any air gap between them.
  • intumescent gaskets to be obtained having an external profile of any form and geometry, a situation which cannot be achieved in the case of intumescent gaskets obtained by covering of the intumescent material or provided with external woven glass fibre sheath, such as those described for example in EP 2062617 , wherein the covering/sheath adapts to the shape of the intumescent material generally in strip form.
  • the silicone elastomer material is crosslinked without heat in a few seconds by means of UV radiation exposure, at a temperature extensively compatible with all intumescent materials including those which expand at lower temperatures.
  • the silicone elastomer used here is typically a solid silicone elastomer containing silicone polymers with high molecular weight and long polymer chains, perfectly suitable for the process of extrusion and which can be crosslinked without the use of heat (cold) by means of UV radiation exposure.
  • intumescent gaskets with smooth surfaces which can house internally expandable intumescent materials.
  • These gaskets are suitable for being usable from -60°C to the temperature of expansion of the intumescent material.
  • This siliconic material can also be formulated with one or more specific additives which give resistance, for example, to heat, flame, bacteria and mould.
  • the gasket 100 shown in Fig. 7 has the external covering with a P profile, in cross section, which is formed by a central portion 101 where the intumescent material 102 is contained, wherefrom a hitching foot 106 and an internally hollow abutting balloon 105 extend, which are both integral with said central portion 101.
  • the gasket 100 has an external covering as defined above and moreover comprises hitching feet 106 represented by a T portion, which is integral with said central portion 101, as illustrated in Figs. 8-9 .
  • the gasket 100 has an external covering comprising two fins 103 and a T portion 106 which is however separated from said central portion 101 by means of a through cavity 107.
  • the T portion 106 is suitable for being inserted in the guillotine 7 of a door sill 8 and ensures that it is restrained by said guillotine 7, forming a seal between the fire door and the respective frame.
  • the gasket 100 has the external covering whose profile, in cross section, is formed by a central portion 101 from whose end a hitching foot 106 and a hollow abutting balloon 105 extend, as illustrated in Fig. 6 .
  • the fins in silicone 103 like the abutting balloons 105 in silicone, represent means suitable for cold smoke sealing.
  • the lack of PVC ensures the lack of hydrochloric acid fumes in the event of fire.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Building Environments (AREA)
  • Special Wing (AREA)
EP11175461A 2010-07-28 2011-07-26 Joints intumescents d'un seul tenant pour garantir l'étanchéité contre la fumée froide et chaude, en particulier pour registres coupe-feu Withdrawn EP2412409A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2010A001394A IT1401149B1 (it) 2010-07-28 2010-07-28 Serrande tagliafuoco dotate di guarnizioni intumescenti a corpo unico per tenuta ai fumi freddi e caldi

Publications (1)

Publication Number Publication Date
EP2412409A1 true EP2412409A1 (fr) 2012-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11175461A Withdrawn EP2412409A1 (fr) 2010-07-28 2011-07-26 Joints intumescents d'un seul tenant pour garantir l'étanchéité contre la fumée froide et chaude, en particulier pour registres coupe-feu

Country Status (2)

Country Link
EP (1) EP2412409A1 (fr)
IT (1) IT1401149B1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8844938B2 (en) 2012-01-19 2014-09-30 Lawrence Livermore National Security, Llc. Emergency sacrificial sealing method in filters, equipment, or systems
EP2995353A1 (fr) * 2014-09-12 2016-03-16 Werner Wildeboer Installation de desenfumage et de protection contre les incendies pour installations de ventilation, comprenant au moins un element de blocage
EP3101363A1 (fr) * 2015-06-01 2016-12-07 TROX GmbH Clapet de fermeture destiné à être utilisé dans un canal d'une installation de ventilation ou d'une installation de désenfumage mécanique
US10323856B2 (en) 2015-05-22 2019-06-18 Superposed Associates Llc Passive ductwork intumescent fire damper
US10363443B2 (en) 2016-06-30 2019-07-30 Superposed Associates Llc Passive ductwork intumescent fire damper
EP3603750A1 (fr) * 2018-07-31 2020-02-05 Grempco S.A. Volet de désenfumage et son étanchéité
EP3984602A1 (fr) * 2020-10-19 2022-04-20 Ekovent Ab Amortisseur d'incendie pour système de ventilation
US11364398B2 (en) 2017-08-03 2022-06-21 Lawrence Livermore National Security, Llc Heat and fire resistant gel seal
EP4186565A1 (fr) 2021-11-29 2023-05-31 Jpr Joint d'étanchéité pour aéronef et aéronef incorporant au moins un tel joint

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2079669A (en) * 1980-07-01 1982-01-27 Lorient Polyprod Ltd Intumescent fire seals
EP1132563A2 (fr) * 2000-03-07 2001-09-12 Intumex Brandschutzprodukte AG Ruban coupe-feu intumescent enrobé sur trois côtés ainsi que joint d'étanchéité combiné pour gaz chauds et froids
EP2062617A1 (fr) 2007-08-01 2009-05-27 Ruskin Air Management Limited Clapet coupe-feu
DE102009000618A1 (de) 2008-02-08 2009-08-13 Halton Oy Brand- und Rauchabsperrvorrichtung und Verfahren zum brand- und rauchdichten Einbau einer Brand- und Rauchabsperrvorrichtung in eine Wand

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2079669A (en) * 1980-07-01 1982-01-27 Lorient Polyprod Ltd Intumescent fire seals
EP1132563A2 (fr) * 2000-03-07 2001-09-12 Intumex Brandschutzprodukte AG Ruban coupe-feu intumescent enrobé sur trois côtés ainsi que joint d'étanchéité combiné pour gaz chauds et froids
EP2062617A1 (fr) 2007-08-01 2009-05-27 Ruskin Air Management Limited Clapet coupe-feu
DE102009000618A1 (de) 2008-02-08 2009-08-13 Halton Oy Brand- und Rauchabsperrvorrichtung und Verfahren zum brand- und rauchdichten Einbau einer Brand- und Rauchabsperrvorrichtung in eine Wand

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8844938B2 (en) 2012-01-19 2014-09-30 Lawrence Livermore National Security, Llc. Emergency sacrificial sealing method in filters, equipment, or systems
US9581243B2 (en) 2012-01-19 2017-02-28 Lawrence Livermore National Security, Llc Emergency sacrificial sealing method in filters, equipment, or systems
EP2995353A1 (fr) * 2014-09-12 2016-03-16 Werner Wildeboer Installation de desenfumage et de protection contre les incendies pour installations de ventilation, comprenant au moins un element de blocage
EP2995353B1 (fr) 2014-09-12 2023-09-20 Wildeboer, Jürgen Installation de desenfumage et de protection contre les incendies pour installations de ventilation, comprenant au moins un element de blocage
US10323856B2 (en) 2015-05-22 2019-06-18 Superposed Associates Llc Passive ductwork intumescent fire damper
US11105530B2 (en) 2015-05-22 2021-08-31 Superposed Associates Llc Passive ductwork intumescent fire damper
EP3101363A1 (fr) * 2015-06-01 2016-12-07 TROX GmbH Clapet de fermeture destiné à être utilisé dans un canal d'une installation de ventilation ou d'une installation de désenfumage mécanique
US10363443B2 (en) 2016-06-30 2019-07-30 Superposed Associates Llc Passive ductwork intumescent fire damper
US11364398B2 (en) 2017-08-03 2022-06-21 Lawrence Livermore National Security, Llc Heat and fire resistant gel seal
EP3603750A1 (fr) * 2018-07-31 2020-02-05 Grempco S.A. Volet de désenfumage et son étanchéité
EP3984602A1 (fr) * 2020-10-19 2022-04-20 Ekovent Ab Amortisseur d'incendie pour système de ventilation
EP4186565A1 (fr) 2021-11-29 2023-05-31 Jpr Joint d'étanchéité pour aéronef et aéronef incorporant au moins un tel joint
FR3129603A1 (fr) 2021-11-29 2023-06-02 Jpr Joint d’étanchéité pour aéronef et aéronef incorporant au moins un tel joint.

Also Published As

Publication number Publication date
ITMI20101394A1 (it) 2012-01-29
IT1401149B1 (it) 2013-07-12

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