SIST EN 2331:2001

Aerospace series - Textile glass fibre preimpregnates - Test methods for the determination of the resin and fibre content and mass of fibre per unit area

This standard specifies a method for determining the resin content (with or without volatiles) and fibre content and mass of fibre per unit area of a textile glass fibre preimpregnate by ignition and solvent extraction, for aerospace use.

Luft- und Raumfahrt - Glasfilament-Prepreg - Prüfmethode zur Bestimmung des Harz- und Faseranteils sowie der flächenbezogenen Fasermasse

Diese Norm legt ein Verfahren zur Bestimmung des Harzmasseanteils (mit oder ohne flüchtige Bestandteile), des Fasermasseanteils und der flächenbezogenen Fasermasse von vorimprägnierten Glasfilamenten durch Veraschung und Extraktion mit Lösungsmitteln für die Luft- und Raumfahrt fest.

Série aérospatiale - Préimprégnés de fibres de verre textile - Méthode d'essai pour la détermination des teneurs en résine et en fibres et de la masse surfacique des fibres

La présente norme spécifie une méthode par calcination et par extraction par solvant de détermination de la teneur en résine (avec ou sans matières volatiles), de la teneur en fibres et de la masse surfacique des fibres d'un préimprégné de fibres de verre textile destiné à une utilisation aérospatiale.

Aerospace series - Textile glass fibre preimpregnates - Test methods for the determination of the resin and fibre content and mass of fibre per unit area

General Information

• Status: Published
• Publication Date: 31-May-2001
• ICS: 49.025.60 - Textiles
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jun-2001
• Due Date: 01-Jun-2001
• Completion Date: 01-Jun-2001
• Ref Project: EN 2331:1993 - Aerospace series - Textile glass fibre preimpregnates - Test methods for the determination of the resin and fibre content and mass of fibre per unit area

Overview

EN 2331:1993 is a CEN aerospace series standard that defines test methods for characterizing textile glass fibre preimpregnates (prepregs). The standard specifies procedures to determine the resin content (reported either including or excluding volatile components), the fibre content, and the mass of fibre per unit area of glass-fibre prepregs using ignition and solvent extraction techniques. This standard is intended for aerospace applications where accurate material composition data is critical for performance, certification and process control.

Key Topics

• Scope and purpose: Measurement of resin and fibre proportions and areal fibre mass of textile glass fibre preimpregnates for aerospace use.
• Test principles: Two accepted approaches are described:
  • Ignition method - thermal decomposition to remove resin and determine residual fibre mass.
  • Solvent extraction method - chemical removal of resin to quantify fibre and resin fractions.
• Resin content reporting: Procedures accommodate determination of resin content with or without volatiles, addressing differences in prepreg formulations and storage conditions.
• Areal fibre mass: Determination of mass of fibres per unit area (important for lay-up calculations and mechanical property predictions).
• Quality and repeatability: Emphasis on reproducible sample preparation and measurement to support reliable material data for aerospace manufacturing and inspection.

Applications

EN 2331 is practical and widely used by professionals involved in composite materials for aerospace:

• Material suppliers and manufacturers - incoming inspection, process control, and certificate of analysis for glass-fibre prepregs.
• Aerospace OEMs and Tier suppliers - verification of prepreg batches to meet design specifications and procurement requirements.
• Quality assurance and testing laboratories - routine and acceptance testing to support conformity assessment and traceability.
• R&D and product development teams - material characterization during formulation, shelf-life studies, and production trials.
• Regulatory and certification - providing documented evidence of material composition for airworthiness and standards compliance.

Related Standards

• Other aerospace series and composite test standards addressing prepreg handling, mechanical testing, and environmental conditioning (refer to the relevant EN/ISO composite test suites used in aerospace certification).
• Standards covering rheology, cure characterization, and volatile content measurement that complement resin/fibre content testing.

Keywords: EN 2331, textile glass fibre preimpregnates, prepreg, resin content, fibre content, mass per unit area, ignition method, solvent extraction, aerospace materials testing, composite quality control.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Textile glass fibre preimpregnates - Test methods for the determination of the resin and fibre content and mass of fibre per unit areaLuft- und Raumfahrt - Glasfilament-Prepreg - Prüfmethode zur Bestimmung des Harz- und Faseranteils sowie der flächenbezogenen FasermasseSérie aérospatiale - Préimprégnés de fibres de verre textile - Méthode d'essai pour la détermination des teneurs en résine et en fibres et de la masse surfacique des fibresAerospace se
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