BS EN ISO 11963:2012 download free.Plastics – Polycarbonate sheets – Types, dimensions and characteristics.
This International Standard specifies the requirements for solid, flat extruded sheets of polycarbonate (PC) for general applications. It applies specifically to sheets made of poly(p,p’-isopropylidene-diphenyl carbonate). The sheets may be coloured or colourless, and they may he transparent, translucent or opaque. The sheets may also have a special weather-protective layer on one or both surfaces.
This International Standard applies only to thicknesses equal to or greater than 1,5 mm.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 62:2008, Plastics — Determination of water absorption
ISO 75-1, Plastics — Determination of temperature of deflection under load — Part 1: General test method
ISO 75-2:2004,Plastics — Determination oftemperature of deflection under load — Part2: Plastics and ebonite
ISO 179-1:2010, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
ISO 291, Plastics — Standard atmospheres for conditioning and testing
3 Composition
3.1 The following type of PC is preferred for PC sheet extrusion:
Thermoplastics ISO 7391-PC,E,61-09
(see Iso 7391-1 for explanation of designation system for PC)
3.2 The sheet may contain colorants, additives, processing aids and stabilizers (e.g. UV-absorbers) up to a total mass content of 5 %.
3.3 Sheets of the type specified in Clause 4 may have a protective layer (on one or both surfaces) with a UV-absorber content higher than that of the substrate. The composition of the protective layer (e.g. polycarbonate and UV-absorber, or PMMA and UV-absorber, or other materials) and the application techniques (e.g. co-extrusion, coating, lamination, flow-coating, dipping) are not specified by this International Standard.
4 Requirements
4.1 Masking
The surface of the sheet as delivered shall be protected by plastic film or paper or a combination of both.
4.2 Appearance
Requirements concerning defects and optical quality shall be agreed upon between the interested parties.
4.3 Colour
The colorant(s) shall be homogeneously and uniformly distributed throughout the material, unless otherwise specified. For critical requirements, the degree of homogeneity shall be specified by the interested parties.