ASTM D4466-02(2007)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D4466 – 02 (Reapproved 2007)
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 manufac-
bicomponent fiber, n—a fiber consisting of two polymers
ture, or natural polymers can be formed during growth, to
which are chemically different or physically different, or
produce multicomponent fibers having special properties such
both.
as cross dyeability, differential shrinkage, or bulk. This stan-
biconstituent fiber, n—deprecated term. Use the preferred
dard contains terms which can be used to describe the physical
term bicomponent bigeneric fiber.
arrangement of components of such fibers. The schematic
diagram in Annex A1 provides a guide for interpreting the
DISCUSSION—As used in the FederalTrade Commission’s “Rules and
terminology used in describing two- and three-component Regulations Under the Textile Fiber Products Identification Act,”
“biconstituent fiber” is “essentially a physical combination or mixture
fibers, but is not intended to be limiting. Some examples of
of two or more chemically distinct constituents or components com-
usage are given in Annex A2, and a bibliography of related
bined at or prior to the time of extrusion, which if separately extruded,
literature is given in Appendix X1.
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
2 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
two or more polymers at least two of which have a
genericclass, n—as used with textile fibers, a grouping having
similar chemical compositions or specific chemical charac- continuous longitudinal external surface.
sheath-core, adj—a descriptive term for a multicomponent
teristics.
textile fiber consisting of a continuous envelope which
DISCUSSION—In the United States, the generic names and definitions
encases a continuous, central, internal region. (See also
of man-made fibers, such as nylon, polyester, and acrylic, are published
component.)
by the FederalTrade Commission in “Rules and Regulations Under the
Textile Fiber Products Identification Act.” Technically, fibers may be
DISCUSSION—Both the sheath and the core can consist of more than
bigeneric, trigeneric, etc.
one component arranged laterally, concentrically, or in matrix.
Components
matrix, adj—a descriptive term for a textile fiber in which one
ormorepolymericfibrousmaterial(s)isdispersedinanother.
polymer, n—a macromolecular material formed by the chemi-
cal combination of monomers having either the same or
Order for Naming Multicomponent Fibers
different chemical composition.
1. Trademark.
2. Physical arrangement of components: bilateral, matrix,
ThisterminologyisunderthejurisdictionofASTMCommitteeD13onTextiles
sheath-core.
and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.
3. Number of components: bicomponent, tricomponent, etc.
Current edition approved July 1, 2007. Published July 2007. Originally approved
´ 1 4. Number of generic classes: monogeneric, bigeneric,
in 1985 . Last previous edition approved in 2002 as D4466 – 02. DOI: 10.1520/
trigeneric, etc.
D4466-02R07.
For referenced
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