This standard specifies methods for determining the ash content of filled and unfilled materials of polyethylene terephthalate, polybutylene terephthalate and their copolymers. The general procedures in this standard are based on ISO 3451-1. For non-filled materials, use method A or C of ISO 3451-1, and for filled and glass fiber reinforced materials, use method A of ISO 3451-1. In the case of glass fiber reinforced materials containing flame retardants (antimony trioxide) and/or other volatile additives, such as zinc sulphide pigments, the standard may be amended to remove these as volatile bromine compounds. is necessary.
JIS K 7250-2:2002 history
2002JIS K 7250-2:2002 Plastics -- Determination of ash -- Part 2: Poly (alkylene terephthalate) materials