EP0283072A2 - Platte mit Hohlraumstruktur auf Polycarbonatbasis - Google Patents

Platte mit Hohlraumstruktur auf Polycarbonatbasis Download PDF

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Publication number
EP0283072A2
EP0283072A2 EP88200354A EP88200354A EP0283072A2 EP 0283072 A2 EP0283072 A2 EP 0283072A2 EP 88200354 A EP88200354 A EP 88200354A EP 88200354 A EP88200354 A EP 88200354A EP 0283072 A2 EP0283072 A2 EP 0283072A2
Authority
EP
European Patent Office
Prior art keywords
polycarbonate
added
layer
baffles
sheet
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Withdrawn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
EP88200354A
Other languages
English (en)
French (fr)
Other versions
EP0283072A3 (de
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 EP0283072A2 publication Critical patent/EP0283072A2/de
Publication of EP0283072A3 publication Critical patent/EP0283072A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E06B3/6715—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased thermal insulation or for controlled passage of light

Definitions

  • the present invention relates to an alveolar sheet of polycarbonate comprising a first outer wall and a second outer wall, with both of said walls being horizontal and parallel, and joined with each other by perpendicular, equidistant baffles. At least one of said outer walls comprises a polycarbonate layer, to which a substance capable of neutralizing the action of U.V. light -- which in the following is simply denominated "U.V.-protective substance" -- is added.
  • the alveolar sheets of polycarbonate are used above all in the industrial buildings for replacing glass when large luminous surfaces endowed with optimum characteristics of thermal insulation, impact strength, light-weight, easy assemblage and transportation, have to be accomplished.
  • polycarbonate is known to the particularly sensitive to U.V. light, the sun light is composed by.
  • the U.V. beam impinging against an U.V.-­protective particle is obviously neutralized by the said particle.
  • At least one of the two outer walls, kept bonded to the other outer wall by vertical baffles, is constituted by two overlapping polycarbonate layers.
  • the first, outermost, layer is constituted by simple polycarbonate
  • the second layer, underlying the first layer, and adherent to it is constituted by polycarbonate to which an U.V.-protective substance is added.
  • the purpose of the present invention is to provide a sheet which makes it possible the above drawbacks to be obviated, and which is hence endowed with a good level of resistance to ageing, even if low percentages of U.V.-­protective substance are used, and which, thanks to the use of limited percentages of U.V.-protective substance is also cheap and easily extrudable.
  • the alveolar sheet of polycarbonate of the present invention comprises a first outer wall and a second outer wall, both of which are horizontal and parallel, and are joined with each other by equidistant perpendicular baffles, with at least one of said two outer walls comprising a layer of polycarbonate to which an U.V. light neutralizing substance is added, and is characterized in that it comprises, associated with said layer of polycarbonate to which an U.V. light neutralizing substance is added, a set of layers perpendicular to said layer, which perpendicular layers also are made from polycarbonate to which an U.V.-­protective substance is added.
  • the advantages obtained by means of the present invention are substantially those of producing a sheet which, with its resistance to ageing being the same, results cheaper, and more easily extrudable.
  • the better extrusion ability of the sheet results in a reduction in the pieces affected by imperfections.
  • Figure 1 shows a perspective view of a piece of sheet manufactured according to the invention.
  • the sheet of the invention is a polycarbonate sheet of alveolar type.
  • first outer wall 2 and a second outer wall 3 which are joined with each other by a plurality of baffles 4 positioned perpendicularly to the same walls 2 and 3.
  • the first wall 2 is constituted by an outer layer 5 of pure carbonate adhering to an inner layer 6 of polycrbonate to which an U.V.-protective substance is added.
  • the inner layer 6 is constituted by 96% of polycarbonate and 4% of U.V.-­protective substance.
  • the perpendicular baffles 4 have a thickness which is substantially equal to the thickness of the walls 2 and 3 and in the nearby of their middle axis, baffles 7 are provided, which are parallel to the walls 2 and 3, and have a thickness lower than the thickness of the perpendicular baffles 4.
  • the portions 10 of the perpendicular baffles 4 between the baffles 7 and the inner layer 6 are constituted by a structure having, for purely indicative purposes, a composition of 98% of polycarbonate, to which a 2% of U.V.-protective substance is added.
  • the sheet 1 is assembled in the building in such a way that the wall 2 is directed towards the light source generating the U.V. light. Nearly all of the U.V. light impinging of the wall 2 is neutralized by the inner layer 6, and the outer layer 5 performs a simple action of protection of the inner layer 6 from possible attacks of chemical, or mechanical nature, which may take place above all during the sheet extrusion process.
  • the overall effectiveness of the inner layer 6 associated with the pluralty of portions of baffles 10 perpendicular to it, is generally higher than it would be obtained by means of a single layer, or of a plurality of parallel layers containing, in the overall, identical percentages of U.V.-protective substance.
  • the layer(s) of polycarbonate containing the U.V.-­protective substance, and associated with the perpendicular baffles 4 can be also extended, of course, along the portions 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Laminated Bodies (AREA)
  • Dental Preparations (AREA)
  • Panels For Use In Building Construction (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP88200354A 1987-03-18 1988-02-25 Platte mit Hohlraumstruktur auf Polycarbonatbasis Withdrawn EP0283072A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2116987U IT210076Z2 (it) 1987-03-18 1987-03-18 Lastra alveolare in policarbonato.
IT2116987U 1987-03-18

Publications (2)

Publication Number Publication Date
EP0283072A2 true EP0283072A2 (de) 1988-09-21
EP0283072A3 EP0283072A3 (de) 1990-05-16

Family

ID=11177795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88200354A Withdrawn EP0283072A3 (de) 1987-03-18 1988-02-25 Platte mit Hohlraumstruktur auf Polycarbonatbasis

Country Status (2)

Country Link
EP (1) EP0283072A3 (de)
IT (1) IT210076Z2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406353A (en) * 2003-09-03 2005-03-30 Ultraframe Uk Ltd Glazing panels
WO2009041973A1 (en) * 2007-09-27 2009-04-02 Sabic Innovative Plastics Ip Bv Polymer sheeting
GB2464331A (en) * 2008-07-03 2010-04-21 David John Anderson Glazing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114597A (en) * 1975-12-31 1978-09-19 The Franklin Institute Unitary solar collector
EP0054856A1 (de) * 1980-12-23 1982-06-30 Bayer Ag Stegdoppelplatten
EP0110221A2 (de) * 1982-11-25 1984-06-13 Röhm Gmbh Polycarbonat-Kunststofftafel
DE3414116A1 (de) * 1984-04-14 1985-10-24 Bayer Ag, 5090 Leverkusen Uv-stabilisierte polycarbonatformkoerper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114597A (en) * 1975-12-31 1978-09-19 The Franklin Institute Unitary solar collector
EP0054856A1 (de) * 1980-12-23 1982-06-30 Bayer Ag Stegdoppelplatten
EP0110221A2 (de) * 1982-11-25 1984-06-13 Röhm Gmbh Polycarbonat-Kunststofftafel
DE3414116A1 (de) * 1984-04-14 1985-10-24 Bayer Ag, 5090 Leverkusen Uv-stabilisierte polycarbonatformkoerper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406353A (en) * 2003-09-03 2005-03-30 Ultraframe Uk Ltd Glazing panels
WO2009041973A1 (en) * 2007-09-27 2009-04-02 Sabic Innovative Plastics Ip Bv Polymer sheeting
CN101878107A (zh) * 2007-09-27 2010-11-03 沙伯基础创新塑料知识产权有限公司 聚合物板材
GB2464331A (en) * 2008-07-03 2010-04-21 David John Anderson Glazing

Also Published As

Publication number Publication date
IT210076Z2 (it) 1988-11-14
IT8721169V0 (it) 1987-03-18
EP0283072A3 (de) 1990-05-16

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