ISO 10120-1991 PDF

Full title and description

ISO 10120:1991 — Carbon fibre — Determination of linear density. This International Standard (first edition, 1991) specifies a method for determining the linear density (mass per unit length) of carbon fibre products used as reinforcement in composite materials.

Abstract

ISO 10120:1991 defines the procedure for measuring the linear density of carbon fibres to ensure consistent characterisation for manufacturing, quality control and specification purposes. The standard was published in December 1991 and is a short technical specification (2 pages).

General information

• Status: Withdrawn.
• Publication date: December 1991 (first edition; some records list 15 December 1991).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.100.20 (Carbon materials / fibres).
• Edition / version: 1 (1991).
• Number of pages: 2.

Scope

This standard covers the determination of the linear density (mass per unit length) of carbon fibre. It is intended to provide a repeatable laboratory procedure for characterising fibres used in reinforcement and composite manufacture; it does not cover other physical or mechanical properties of the fibre. The original ISO record shows the standard was later withdrawn and replaced by a revised method in ISO 1889.

Key topics and requirements

• Definition of linear density for carbon fibres (mass per unit length) and the units used.
• Sampling and specimen preparation considerations to obtain representative fibre lengths.
• Measurement procedure for determining mass of a measured length and calculation of linear density (mass ÷ length).
• Reporting requirements — presentation of results, test conditions and any deviations from the procedure.
• Short technical format intended for routine quality-control testing rather than extensive research methods.

Typical use and users

Manufacturers of carbon fibre and composite reinforcements, materials laboratories, quality-control technicians and standards committees use this type of standard to ensure consistent specification and testing of linear density for production control, acceptance testing and material data sheets.

Related standards

ISO 10120:1991 was withdrawn and the subject was taken over by ISO 1889 (first issued 1997), which provides the revised method(s) for determination of linear density of reinforcement yarns and related materials; later editions of ISO 1889 (including 2009) further updated the series.

Keywords

ISO 10120, carbon fibre, linear density, mass per unit length, fibre testing, reinforcement yarn, quality control.

FAQ

Q: What is this standard?

A: ISO 10120:1991 is an International Standard titled "Carbon fibre — Determination of linear density" that specifies a method for measuring the mass per unit length of carbon fibres.

Q: What does it cover?

A: It covers the test procedure for determining linear density of carbon fibre (sampling, measurement and calculation) in a concise two‑page format intended for routine laboratory use.

Q: Who typically uses it?

A: Fibre and composite manufacturers, test laboratories, quality-control personnel and engineers specifying fibre properties for composite production commonly use such a standard.

Q: Is it current or superseded?

A: ISO 10120:1991 has been withdrawn. Its subject matter was revised and incorporated into ISO 1889 (first published 1997) and later editions; some commercial records note a withdrawal action recorded in 2019.

Q: Is it part of a series?

A: The test for linear density of reinforcement fibres is covered in the broader family of standards for reinforcement yarns and fibres — most directly by ISO 1889 which succeeded ISO 10120.

Q: What are the key keywords?

A: Carbon fibre; linear density; mass per unit length; fibre testing; ISO 10120; ISO 1889.