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See Chinese contents: GB/T 42923-2023 GB/T 42923-2023: Glass-fibre-reinforced plastic products - Determination of fibre length
This document describes the method for determining fiber length in glass-fiber-reinforced plastic products. This document is applicable to discontinuous glass-fiber-reinforced thermoplastic molding compounds and molded parts. Before molding, the fiber length is less than or equal to 7.5 mm; after molding, the fiber length is less than 1 mm. NOTE: fiber-reinforced polymer matrix composites of other lengths may take this as a reference.
