Fiber density is useful in the evaluation of new materials at the research and development level and is one of the material properties normally given in fiber specifications.

Fiber density is used to determine fiber strength and modulus both of a fiber bundle and an individual filament. These properties are based on load or modulus slope over an effective area. Fiber density may be used with lineal mass of the fiber to give an approximation of effective tow area. Tow area divided by the average number of filaments in a tow gives an approximation of the effective area of an individual filament.

Fiber density is used as a constituent property when determining reinforcement volume and void volume based on reinforcement mass and laminate density.

1. Scope

1.1 This test method covers the determination of the density of high-modulus fibers and is applicable to both continuous and discontinuous fibers.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See Section 9 for additional information.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D891 Test Methods for Specific Gravity, Apparent, of Liquid Industrial Chemicals

D1505 Test Method for Density of Plastics by the Density-Gradient Technique

D3878 Terminology for Composite Materials

D5229/D5229M Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials

D6308 Guide for Identification of Composite Materials in Computerized Material Property Databases

E12 Terminology Relating to Density and Specific Gravity of Solids, Liquids, and Gases

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

Keywords

Archimedes method; buoyancy method; density; fiber density: High modulus fibrous composites; Sink-float method; Archimedes method; Bouyancy method; Continuous high-modulus fibers; Density; Discontinuous high-modulus fibers; Eureka test; Fiber density;

ICS Code

ICS Number Code 49.025.60 (Textiles)

Citing ASTM Standards

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