EP0335015A1 - Self-extinguishing polymeric sheet and large transparent surfaces obtained by means of the combination of a plurality of said sheets - Google Patents

Self-extinguishing polymeric sheet and large transparent surfaces obtained by means of the combination of a plurality of said sheets Download PDF

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Publication number
EP0335015A1
EP0335015A1 EP88201581A EP88201581A EP0335015A1 EP 0335015 A1 EP0335015 A1 EP 0335015A1 EP 88201581 A EP88201581 A EP 88201581A EP 88201581 A EP88201581 A EP 88201581A EP 0335015 A1 EP0335015 A1 EP 0335015A1
Authority
EP
European Patent Office
Prior art keywords
sheet
flame
sheets
self
large transparent
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Withdrawn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
EP88201581A
Other languages
German (de)
English (en)
French (fr)
Inventor
Cosimo Conterno
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.)
LA/ES LAMINATI ESTRUSI TERMOPLASTICI SpA
Original Assignee
LA/ES LAMINATI ESTRUSI TERMOPLASTICI 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 LA/ES LAMINATI ESTRUSI TERMOPLASTICI SpA filed Critical LA/ES LAMINATI ESTRUSI TERMOPLASTICI SpA
Publication of EP0335015A1 publication Critical patent/EP0335015A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/942—Building elements specially adapted therefor slab-shaped
    • 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
    • E04C2/54—Slab-like translucent elements
    • E04C2/543—Hollow multi-walled panels with integrated webs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
    • E04D3/28—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of glass or other translucent material
    • E04D2003/285—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of glass or other translucent material with specially profiled marginal portions for connecting purposes

Definitions

  • the present invention is concerned with a self-­extinguishing polymeric sheet, as well as with large transparent surfaces obtained by means of the combination of a plurality of said sheets.
  • the purposes of the present invention consist in providing a type of sheet, and hence a large transparent surface formed by a plurality of said sheets, which is capable of obviating the above-said drawbacks, by being both self-extinguishing and transparent.
  • a self-extinguishing polymeric sheet which comprises a transparent central portion co-extruded jointly with mutually opposite edges provided with means for fastening the sheet to other, adjacent, sheets, characterized in that the material which forms at least one of the edges is filled with such a substance as to make said edges self-extinguishing.
  • the self-­extinguishing polymeric sheet1 comprises a central portion 2, comprised between two co-extruded edges constituted by a female element 3 and a male element 4.
  • the central portion 2 is formed by a couple of peripheral walls 5 and 6 united by a plurality of adjacent ribs 7, so as to form chambers 8 having a triangular cross-section.
  • the female element 3 is provided with a groove 9 having a "C"-shaped cross-section, and the male element 4 is provided with a protrusion 10 having a circular cross-­section.
  • the female element 3 and the male element 4 are constituted by a structure formed by a plurality of chambers 8 bounded by ribs 7.
  • the female element 3 and the male element 4 are obtained by co-extrusion already united to the central portion 2 along planes 11.
  • the material used in order to realize the female element 3 and the male element 4 is a polymer, e.g., a polycarbonate, having a molecular weight of ⁇ 30,000, to which one or more of the hereinunder listed flame-­retarding substances are added in such percentages as reported for indicative purposes, so as to obtain high values of self-extinguishability (e.g., a "VO" rating according to UL 94): - decabromo-diphenyl-oxide at 5 ⁇ 10%; or - tetrabromo-bis-phenol A at 5 ⁇ 10% plus antimony triox­ide at 1 ⁇ 2%; or - octabromo-diphenyl-oxide at 5 ⁇ 10% plus polytetrafluo­roethylene at 0.5 ⁇ 1%; or - methyl-tetrachloro-phthalamide at 4 ⁇ 6%; or - sodium hexafluoro-aluminate at 0.5 ⁇ 1%; or
  • the male element and the female element obtained by adding the above-mentioned substances to polycarbonate show poor characteristics of transparency.
  • the material used in order to realize the central portion is also a polycarbonate having a molecular weight of ⁇ 30,000, or another polymer, wherein however the hereinunder listed possible additions of chemical substances have been so studied as to preserve the characteristics of transparency, with rather good self-extinguing characteristics being anyway simultaneously secured (e.g., a "V2" rating according to UL 94): an oligomer based on tetrabromo-bis-phenol A at 3 ⁇ 10%; or the potassium salt of phenyl-sulphone-3-sulphuric acid at 0.3 ⁇ 0.5% with either sodium bromide at 0.1 ⁇ 0.2% or potassium bromide at 0.1 ⁇ 0.2% added.
  • the percentage of transparency of the so-obtained self-extinguishing surface reaches a value of 80 ⁇ 82%.
  • Additives can be added to the central portion in such a way as to still have rather good self-­extinguishing characteristics ("V2" according to UL94), with a transparency of the manufactured sheet comprised within the range of from 80 to 82%, by using:
  • the sheet 1 When the sheet 1 is assembled, it shall be so positioned as to direct said external protective layer towards the room the flames are supposed to come from.
  • a large transparent surface By combining a plurality of sheets 1, a large transparent surface can be formed, for example, such a surface as generally indicated by the reference numeral 12 ( Figure 2). It is interesting to observe that the so-­obtained large surface, even if, from a physical and a geometrical viewpoint, is one single sheet structure, it is chemically interrupted by a plurality of vertical flame-stop sectors 14 endowed with a high flame-­extinguishing power, bounded by two mutually opposite joining planes 11, each one of which belongs to a respective sheet 1.
  • the surface 12 is completed in a conventional way by two side section bars 15, an upper section bar 16, a lower section bar 17, pads 18 and aluminum tape stripes 19.
  • both the upper section bar 16 and the lower section bar 17 are made from a polymer which has the same self-extinguishing power as of the vertical flame-stop sectors 14, so as to constitute horizontal flame-stop sectors 16-17 incident relatively to the vertical sectors 14.
  • the large transparent surface results to be subdivided into areas bounded by the elements 14, 16, 17 constituting sectors, beyong whose boundaries the possibly ignited flame is not capable of spreading, because it self-extinguishes when it comes to face with a considerably higher resistance to spread than as already found in the central portion 2 of each sheet 1.
  • the large transparent surface 13 is of the type comprising a window generally indicated by the reference numeral 20.
  • the large surface 13 is provided with an upper section bar 16 and a lower section bar 17, both made from a self-­extinguishing material corresponding to that of the vertical flame-stop sectors 14, and therefore constituting horizontal flame-stop sectors 16-17, indicent relatively to the vertical sectors 14.
  • the large surface 13 is completed in the conventional way by section bars for the openable sheets 21, section bars for stop beads 22, pads 18, hinges 23, screws and brackets 24, stripes of aluminum tape 19.
  • edges of a sheet which cannot be directly manufactured by co-extrusion could be realized however by means of applied self-extinguishing edges, viz., separately manufactured edges which are bonded to the sheet at a later time according to various modalities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Laminated Bodies (AREA)
EP88201581A 1988-03-30 1988-07-21 Self-extinguishing polymeric sheet and large transparent surfaces obtained by means of the combination of a plurality of said sheets Withdrawn EP0335015A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2003688 1988-03-30
IT8820036A IT1216662B (it) 1988-03-30 1988-03-30 Lastra polimerica autoestinguente ed estese superfici trasparenti ottenute mediante la composizionedi un pluralita' di dette lastre

Publications (1)

Publication Number Publication Date
EP0335015A1 true EP0335015A1 (en) 1989-10-04

Family

ID=11163311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88201581A Withdrawn EP0335015A1 (en) 1988-03-30 1988-07-21 Self-extinguishing polymeric sheet and large transparent surfaces obtained by means of the combination of a plurality of said sheets

Country Status (2)

Country Link
EP (1) EP0335015A1 (it)
IT (1) IT1216662B (it)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1366650A (fr) * 1962-09-01 1964-07-10 Degussa Procédé pour éviter la formation des flammes sur la face inférieure des joints à recouvrement dans les plaques de résine synthétique à auto-extinction
GB2106159A (en) * 1981-09-16 1983-04-07 Montedison Spa System for connecting transparent plates
GB2171136A (en) * 1985-02-20 1986-08-20 Lorient Polyprod Ltd Fire resistant glazing strip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1366650A (fr) * 1962-09-01 1964-07-10 Degussa Procédé pour éviter la formation des flammes sur la face inférieure des joints à recouvrement dans les plaques de résine synthétique à auto-extinction
GB2106159A (en) * 1981-09-16 1983-04-07 Montedison Spa System for connecting transparent plates
GB2171136A (en) * 1985-02-20 1986-08-20 Lorient Polyprod Ltd Fire resistant glazing strip

Also Published As

Publication number Publication date
IT8820036A0 (it) 1988-03-30
IT1216662B (it) 1990-03-08

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