MULTILAYER SHEET FOR THERMOFORMING HAVING IMPROVED SAGGING RESISTANCE

The invention relates to a multilayered sheet for a thermoforming process having improved resistance to sagging, the sheet comprising at least one layer of each of: a surface layer A comprising a composite material, wherein said composite material comprises a first amorphous polymer having a glass t...

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Bibliographische Detailangaben
Hauptverfasser:	BOUKALIDIS Cristo, ROUSSEAUX Dimitri
Format:	Patent
Sprache:	eng ; slv
Schlagworte:	LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a multilayered sheet for a thermoforming process having improved resistance to sagging, the sheet comprising at least one layer of each of: a surface layer A comprising a composite material, wherein said composite material comprises a first amorphous polymer having a glass transition temperature Tg1 and from 0.05 wt% to 4.0 wt% as based on the total weight of the composite material of a conductive material; a substrate layer B comprising a polymer composition, wherein said polymer composition comprises at least a second amorphous polymer having a glass transition temperature Tg2, the glass transition temperature Tg2 of the second amorphous polymer being higher than the glass transition temperature Tg1 of the first amorphous polymer; wherein the second amorphous polymer has a heat deflection temperature of at least 85 °C as determined in accordance with ISO 75-2/A; and wherein at least one of the outer layers is the surface layer A. The invention is also concerned by thermoformed articles produced from said multilayered sheets.