Astm D 4850 – 03a pdf free download

Standard Terminology Relating to

This standard is issued under the fixed designation D 4850; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This terminology covers definitions of technical terms
used in the industry related to textile fabrics. Terms that are
generally understood or adequately defined in other readily
available sources are not included. Other terminology standards that have terms related to textile fabrics are shown in 2.1

2. Referenced Documents

2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 3990 Terminology Relating to Fabric Defects
D 4848 Terminology for Force, Deformation, and Related
Properties of Fabric

3. Terminology

3.1 Definitions:
abrasion, n—the wearing away of any part of a material by
rubbing against another surface. D 3884, D 3885, D 3886,
D 4157, D 4158, D 4685, D 4966
abrasion cycle, n—one complete movement across the surface
of a material.
DISCUSSION—The complete movement for an abrasion cycle is
dependent on the action of the abrasion machine and the test method
used. It may consist of one back-and-forth unidirectional movement or
one circular movement, or a combination of both. D 3885
air permeability, n—the rate of airflow passing perpendicular
through a known area under a prescribed air pressure
differential between the two surfaces of a material.
DISCUSSION—Air permeability of fabric at a stated pressure differential between two surfaces of the fabric is generally expressed in SI units
as cm3
/s/cm2 and in inch-pound units as ft3
/min/ft2 calculated in
operating conditions. (See permeability, porosity.) D 737
air-supported roof, n—a fabric roof system that is properly
secured and primarily supported and held in place by air
pressure. D 4851

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