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Description / Abstract:
Material Description. This specification
describes material types of polycarbonate copolymer that offer all
the attributes of standard polycarbonate (PC) resin with enhanced
weather resistance without the aid of a protective coating. Code
numbers distinguish between different levels of weatherability
based on color formulation and the applications requirements. Two
resin melt flow rates are available. For high flow grades, a suffix
indicating low molecular weight shall be added, see Table 3. This
specification is based on GMW3013 per ISO 7391-1/2
recommendations.
Paintability. Approved decorative paint systems
that can be used on this material are listed in the General Motors
Approved Paint on Parts Systems (GM APOPS) database.
Types. The standard properties are described in
Table 1, the different levels of weather resistance properties are
described in Table 2 and resin melt flow options are listed in
Table 3. If no type designation is defined, Type 1 (T1), of highest
level of weatherability, and standard resin melt flow, applies as
the default standard.
Symbols. The material abbreviation according to
ISO 11469 is PC.
Typical Applications. Typical applications
include interior and exterior applications that are exposed to
sunlight without an Ultraviolet (UV) protective coating. Not
intended for use in optical lens applications for regulated
exterior lighting, refer to GMW16729.