ASTM D4466-02(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D4466 − 02 (Reapproved 2012)
Standard Terminology Related to
Multicomponent Textile Fibers
This standard is issued under the fixed designation D4466; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope component, n—as used with textile fiber polymers, a polymer
with distinguishable properties.
1.1 Man-made polymers can be combined during
manufacture, or natural polymers can be formed during
bicomponent fiber, n—a fiber consisting of two polymers
growth, to produce multicomponent fibers having special
which are chemically different or physically different, or
properties such as cross dyeability, differential shrinkage, or
both.
bulk. This standard contains terms which can be used to
biconstituent fiber, n—deprecated term. Use the preferred
describe the physical arrangement of components of such
term bicomponent bigeneric fiber.
fibers. The schematic diagram in Annex A1 provides a guide
DISCUSSION—As used in the Federal Trade Commission’s “Rules and
for interpreting the terminology used in describing two- and
Regulations Under the Textile Fiber Products Identification Act,”
three-component fibers, but is not intended to be limiting.
“biconstituent fiber” is “essentially a physical combination or mixture
Some examples of usage are given in Annex A2, and a
of two or more chemically distinct constituents or components com-
bibliography of related literature is given in Appendix X1.
bined at or prior to the time of extrusion, which if separately extruded,
would fall within different .” generic classes. In the preferred ASTM
1.2 For definitions of other textile terms, refer to Terminol-
terminology, a biconstituent fiber is a bicomponent bigeneric fiber. It is
ogy D123.
not clear from the “Rules” whether a biconstituent fiber has a
sheath-core, bilateral, or matrix configuration.
2. Referenced Documents
tricomponent fiber, n—a fiber consisting of three polymers
2.1 ASTM Standards:
which are chemically different, physically different, or any
D123 Terminology Relating to Textiles
combination of such differences.
Generic Class
Physical Arrangement of Components
3. Terminology
lateral, adj—a descriptive term for a textile fiber composed of
generic class, n—as used with textile fibers, a grouping having
two or more polymers at least two of which have a
similar chemical compositions or specific chemical charac-
continuous longitudinal external surface.
teristics.
sheath-core, adj—a descriptive term for a multicomponent
DISCUSSION—In the United States, the generic names and definitions
textile fiber consisting of a continuous envelope which
of man-made fibers, such as nylon, polyester, and acrylic, are published
by the FederalTrade Commission in “Rules and Regulations Under the encases a continuous, central, internal region. (See also
Textile Fiber Products Identification Act.” Technically, fibers may be
component.)
bigeneric, trigeneric, etc.
DISCUSSION—Both the sheath and the core can consist of more than
one component arranged laterally, concentrically, or in matrix.
Components
matrix, adj—a descriptive term for a textile fiber in which one
polymer, n—a macromolecular material formed by the chemi-
ormorepolymericfibrousmaterial(s)isdispersedinanother.
cal combination of monomers having either the same or
different chemical composition.
Order for Naming Multicomponent Fibers
1. Trademark.
ThisterminologyisunderthejurisdictionofASTMCommitteeD13onTextiles 2. Physical arrangement of components: bilateral, matrix,
and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.
sheath-core.
Current edition approved July 1, 2012. Published August 2012. Originally
ε 1 3. Number of components: bicomponent, tricomponent, etc.
approved in 1985 . Last previous edition approved in 2007 as D4466 – 02(2007).
DOI: 10.1520/D4466-02R12. 4. Number of generic classes: monogeneric, bigeneric,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
trigeneric, etc.
contact ASTM Custome
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