GB/T 41709-2022 Active National standards

GB/T 41709-2022 Carbon-fibre-reinforced plastics—Determination of the size and aspect ratio of crushed objects

Publish Date: 2022-10-12 Implement Date: 2022-10-12 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 41709-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Special carbon materials

ICS Name: Carbon fiber materials

Publish Date: 2022-10-12

Implement Date: 2022-10-12

Pages: 9 pages

Scope

This document specifies the method for determining the size and length-to-width ratio of crushed carbon fiber reinforced plastic (CFRP) materials, which is primarily applicable to recycled and reused CFRP. This document treats the shape of CFRP crushed materials as rectangles and stipulates the methods for measuring their length and width. This document is suitable for the following average-sized fragments:
——Length: 5 mm to 50 mm;
——Width: 1 mm to 10 mm.
This document provides three measurement methods: two are manual testing methods using microscopes and rulers, and the third is an automatic testing method using measuring instruments.
This document is applicable to CFRP crushed materials made from thermoset resins or thermoplastic resins as the matrix.
Note: If the CFRP crushed materials contain a large number of small fragments and fine particles, it is recommended to sieve them through a 1 mm pore-size sieve before measurement.