EP0933489B1 - Extrudierte Stegmehrfachplatte aus Materialien mit verschiedenen optischen und mechanischen Eigenschaften - Google Patents

Extrudierte Stegmehrfachplatte aus Materialien mit verschiedenen optischen und mechanischen Eigenschaften Download PDF

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Publication number
EP0933489B1
EP0933489B1 EP19990200224 EP99200224A EP0933489B1 EP 0933489 B1 EP0933489 B1 EP 0933489B1 EP 19990200224 EP19990200224 EP 19990200224 EP 99200224 A EP99200224 A EP 99200224A EP 0933489 B1 EP0933489 B1 EP 0933489B1
Authority
EP
European Patent Office
Prior art keywords
ribs
sheets
panel
materials
rays
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
EP19990200224
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English (en)
French (fr)
Other versions
EP0933489A1 (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.)
Politec Polimeri Tecnici SA
Original Assignee
Politec Polimeri Tecnici SA
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 Politec Polimeri Tecnici SA filed Critical Politec Polimeri Tecnici SA
Publication of EP0933489A1 publication Critical patent/EP0933489A1/de
Application granted granted Critical
Publication of EP0933489B1 publication Critical patent/EP0933489B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to the field of the building industry and more specifically to the sector relating to prefabricated panels of synthetic materials obtainable by co-extrusion and generally used to obtain curtain walling and/or roofing.
  • the said panels must have good transparency and thermal insulation properties, so that the environments they delimit may make use of the well-known "greenhouse effect".
  • US-A-4,443,987 discloses an unitary solar window panel comprising an essential clear and planar inner and outer face and a plurality of ribs connected to and extending between the inner and outer faces. Some of the ribs are transparent and some of the ribs are opaque to solar radiation.
  • US-A-5,580,620 describes a multiple void layer synthetic resin panels with first and second exterior plates and at least two spaced apart interior plates located within a space.
  • the plates are interconnected by a plurality of walls extending in a direction perpendicular to the planes of the plates forming a plurality of continuous cellular voids.
  • the scope of the present invention is that of devising a type of alveolar panel, obtainable by co-extrusion, which would enable this disadvantage to be remedied.
  • the applicant of the present invention sensed that if, in the alveolar panels, the stiffening ribs which space apart and connect their transparent external sheets are made with a pre-determined material which is different from that of which the latter are made and thus has different optical light diffusion and reflection properties, these panels, known to be of extremely low weight in themselves, diffuse and/or reflect the solar radiation in the most appropriate manner inside the environment covered or more generally delimited by them.
  • the panel according to the invention thus obtains a more uniform distribution of the solar radiation towards the inside of a greenhouse or an environment of similar type.
  • the parallel flat sheets 2, 3 are of polycarbonate, and the ribs 4i of crystalline P.E.T. (polyethylene terephthalate).
  • the materials which make up the flat sheets 2 and 3 and the ribs 4i are of different type, even though compatible for weld-joining during co-extrusion: a further development of the present invention suitable for affording the assembly greater solidity is provided by the applicant by securing the parallel flat sheets 2, 3 and the ribs 4i together to a greater degree by the application of a layer 5 of a further type of transparent material, having pre-determined rigidity and mechanical strength, on the entire external surface of the panel 1, this layer 5 thus coming to envelop the assembly from the outside.
  • this layer 5 which is transparent, has a thickness and consequently a weight which is very limited and yet affords the panel 1 a high degree of stability.
  • the applicant proposes using the following materials: amorphous polyethylene terephthalate (P.E.T.) for the two parallel flat sheets 2, 3; crystalline polyethylene terephthalate (P.E.T.) for the ribs 4i; polycarbonate for the covering layer 5 enveloping the whole.
  • amorphous polyethylene terephthalate P.E.T.
  • crystalline polyethylene terephthalate P.E.T.
  • polycarbonate for the covering layer 5 enveloping the whole.
  • the part of the light rays which is not diffused does not consecutively pass through the flat panels 2, 3 and the ribs 4i.
  • the size of the said sector ⁇ may be modified as desired, by varying the height h of the ribs and their pitch p; finally the said ribs 4i do not necessarily have to be perpendicular to the said parallel flat sheets 2, 3 but, on the contrary, use may be made of connecting angles ⁇ different from 90° when, for example, the position of the panels 1 is such that only the solar radiation of a certain part of the day may strike them: in this case, by suitably inclining the ribs 4i the effect of proportioning the diffusion and the reflection of the rays of light as desired may also be obtained.
  • the present invention offers notable results from the mechanical point of view, which are manifested in the fact that in an alveolar panel according to the invention, the ribs 4i, being made of crystalline P.E.T., have a modulus of elasticity, and hence a bending strength, greater than that of the ribs of conventional panels made of polycarbonate.
  • the resistance to thermal distortion and softening of a panel according to the invention is greater than that of a conventional polycarbonate panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Greenhouses (AREA)

Claims (1)

  1. Extrudierte alveolare Platte (1), mit zwei parallelen flachen Tafeln (2, 3), die voneinander beabstandet und durch eine Mehrzahl von zueinander parallelen und auf den beiden Tafeln aufstehenden Rippen (4i) verbunden sind, wobei die beiden Tafeln aus transparentem Material hergestellt sind, und wobei die Rippen aus opakem Material hergestellt sind, welches geeignet ist, die auf es einfallenden Lichtstrahlen in einem vorbestimmten Maß zu reflektieren und/oder zu streuen, wodurch die Formstabilität und Lastaufnahmefähigkeit verbessert wird,
    dadurch gekennzeichnet, dass die Rippen (4i) aus kristallinem Polyethylen-Therephthalat hergestellt sind und die beiden Tafeln (2, 3) aus amorphem Polyethylen-Therephtalat hergestellt sind, und dass die Rippen (4i) und die Tafeln (2, 3) auch durch die Wirkung einer Decklage (5) aus Polykarbonat aneinander befestigt sind, welche eine vorbestimmte Steifigkeit aufweist und die Tafeln gegenüber der Außenseite umhüllt, wobei die Rippen (4i), die beiden Tafeln (2, 3) und die Decklage (5) eine Einheit bilden und die Platte (1) durch Koextrusion unter Verwendung verschiedener Temperaturwerte und/oder Kühlverfahren erhalten wird.
EP19990200224 1998-01-30 1999-01-26 Extrudierte Stegmehrfachplatte aus Materialien mit verschiedenen optischen und mechanischen Eigenschaften Expired - Lifetime EP0933489B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH22398A CH692362A5 (it) 1998-01-30 1998-01-30 Pannello alveolare estruso con lastre parallele e nervature ricavate con materiali aventi caratteristiche ottiche e meccaniche differenti.
CH22398 1998-01-30

Publications (2)

Publication Number Publication Date
EP0933489A1 EP0933489A1 (de) 1999-08-04
EP0933489B1 true EP0933489B1 (de) 2003-06-11

Family

ID=4182093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990200224 Expired - Lifetime EP0933489B1 (de) 1998-01-30 1999-01-26 Extrudierte Stegmehrfachplatte aus Materialien mit verschiedenen optischen und mechanischen Eigenschaften

Country Status (6)

Country Link
EP (1) EP0933489B1 (de)
CH (1) CH692362A5 (de)
DE (1) DE69908669T2 (de)
DK (1) DK0933489T3 (de)
ES (1) ES2201627T3 (de)
PT (1) PT933489E (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50205925D1 (de) * 2001-11-30 2006-04-27 Rodeca Gmbh Plattenförmiges Wand- oder Dachelement sowie ein Verfahren und Werkzeug zur Herstellung
ITMI20032533A1 (it) * 2003-12-19 2005-06-20 Politec Polimeri Tecnici Sa Pannello alveolare estruso ad elevata resistenza meccanica
US8568860B2 (en) * 2007-11-12 2013-10-29 Sabic Innovative Plastics Ip B.V. Multiwall polymer sheet comprising branched polycarbonate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443987A (en) * 1979-03-28 1984-04-24 The Franklin Institute Unitary solar window panel
US5580620A (en) * 1994-09-02 1996-12-03 21St Century Ltd. Multiple void layer synthetic resin panels

Also Published As

Publication number Publication date
DE69908669D1 (de) 2003-07-17
DK0933489T3 (da) 2003-10-06
EP0933489A1 (de) 1999-08-04
ES2201627T3 (es) 2004-03-16
CH692362A5 (it) 2002-05-15
DE69908669T2 (de) 2004-04-29
PT933489E (pt) 2003-10-31

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