GB/T 18374-2022
Terminology for reinforcements (English Version)
- Standard No.
- GB/T 18374-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 18374-2022
- Replace
- GB/T 18374-2008
- Scope
- This document defines terms and definitions related to reinforcement materials. This document applies to reinforcements for composite materials.
- Introduction
Core changes in the standard revision
Version Main technical changes New content 2008 Edition Basic terminology framework Terms of carbon fiber and molded plastic products 2022 Edition Structural adjustment + editorial modification New glass fiber, ceramic fiber, three-dimensional fabric, etc.
Reinforced fiber classification system
1. Glass fiber series
- E glass fiber: general electrical insulation type (SiO2-Al2O3-CaO system)
- R/S glass fiber: high strength and high modulus (Al2O3≥20%)
- D glass fiber: low dielectric constant (SiO2-B2O3 system)
2. Specialty fibers
Fiber type Typical properties Application areas Silicon carbide fiber High temperature resistance 1800℃ Aircraft engine hot end components Ultra-high molecular weight polyethylene fiber Specific strength>35cN/dtex Bullet-proof protective equipment
Key performance characterization indicators
Mechanical properties
- Specific modulus: Ratio of elastic modulus to density (Standard 6.23)
- Drapability test: Evaluation of the bundling of untwisted roving (Standard 6.18)
Processing performance
- Chopability: The ease of cutting fiber bundles (Standard 6.40)
- Permeation rate: resin impregnation time (standard 6.56)
Implementation suggestions
- New basalt fiber products should be classified according to clause 4.1
- Three-dimensional fabric performance testing should be combined with the in-plane permeability index of 6.57
- Electronic-grade fibers must meet the dielectric performance requirements of clause 3.53
GB/T 18374-2022 history
- 2022 GB/T 18374-2022 Terminology for reinforcements
- 2008 GB/T 18374-2008 Vocabulary.Terms for reinforcements
- 2001 GB/T 18374-2001 Vocabulary--Terms for reinforcements