GB/T 43308-2023 (English Version)

Standard No.: GB/T 43308-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 43308-2023

Scope: This document specifies the classification and code, product specifications, requirements, test methods, inspection rules, marking, packaging, transportation and storage of glass fiber reinforced thermoplastic unidirectional prepreg (hereinafter referred to as "prepreg"). This document is applicable to unidirectional prepregs with thermoplastic resin as matrix and continuous glass fiber as reinforcement material, which can be used to prepare thermoplastic composite products by winding, molding, pultrusion and other processes.

Introduction

1. Background and significance of standard formulation

GB/T 43308-2023 "Glass Fiber Reinforced Thermoplastic Unidirectional Prepreg" is a comprehensive upgrade based on the original standard, aiming to meet the rapid development needs of the composite materials industry. The standard was formulated by the National Glass Fiber Standardization Technical Committee and widely absorbed the opinions of experts inside and outside the industry to ensure its scientificity and practicality.

2. Standard framework and key technical indicators

Technical requirements	Specific provisions	New or revised content
Classification of matrix resins	Polypropylene (PP), polyethylene (PE), polyamide (PA), etc.	Add compatibility requirements for other matrix resins
Mechanical property grades	Ordinary type (C), high-strength type (T), high modulus (M), high-strength and high modulus (TM)	Add the high-strength and high modulus (TM) category to meet the needs of high-end applications
Universal mass deviation	±5%	Unchanged, but the testing method is more stringent

3. Analysis of the technical evolution of the standard

Compared with the old standard, GB/T 43308-2023 has achieved technological breakthroughs in the following aspects:

Improved material performance: A new high-strength and high-modulus (TM) product category has been added, which is suitable for aerospace, high-end manufacturing and other fields.
Optimized testing methods: The determination steps of the glass fiber mass fraction have been refined to ensure data accuracy.
Enhanced environmental protection requirements: The control of the content of fluorine and alkali metal oxides has been strengthened to promote green production.

4. Implementation suggestions and precautions

Implementation suggestions:

Enterprises should establish a sound quality management system to ensure that products meet standard requirements.
Strengthen employee training, especially improving the technical capabilities of testing personnel.
Optimize production processes and use automated equipment to improve production efficiency and product quality.

GB/T 43308-2023 Referenced Document

GB/T 1040.5 Plastic.Determination of tensile properties.Part 5:Test conditions for unidirectional fibre-reinforced plastic composites
GB/T 1549 Chemical analysis methods of glass,glass marble and vitreous fiber
GB/T 18374 Terminology for reinforcements
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 2577 Test method for resin content of glass fiber reinforced plastics
GB/T 32788.6 Test method for properties of prepreg.Part 6:Determination of mass per unit area
GB/T 3961 Terms for fibre reinforced plastics

GB/T 43308-2023 history

2023 GB/T 43308-2023 Glass fiber reinforced thermoplastic unidirectional prepreg