ASTM D4466-02

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Designation: D 4466 – 02
Standard Terminology for
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Multicomponent Textile Fibers
This standard is issued under the fixed designation D 4466; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope bicomponent fiber, n—a fiber consisting of two polymers
which are chemically different or physically different, or
1.1 Man-made polymers can be combined during manufac-
both.
ture, or natural polymers can be formed during growth, to
biconstituent fiber, n—deprecated term. Use the preferred
produce multicomponent fibers having special properties such
term bicomponent bigeneric fiber.
as cross dyeability, differential shrinkage, or bulk. This stan-
dard contains terms which can be used to describe the physical
DISCUSSION—As used in the Federal Trade Commission’s “Rules and
arrangement of components of such fibers. The schematic Regulations Under the Textile Fiber Products Identification Act,”
“biconstituent fiber” is “essentially a physical combination or mixture
diagram in Annex A1 provides a guide for interpreting the
of two or more chemically distinct constituents or components com-
terminology used in describing two- and three-component
bined at or prior to the time of extrusion, which if separately extruded,
fibers, but is not intended to be limiting. Some examples of
would fall within different .” generic classes. In the preferred ASTM
usage are given in Annex A2, and a bibliography of related
terminology, a biconstituent fiber is a bicomponent bigeneric fiber. It is
literature is given in Appendix X1.
not clear from the “Rules” whether a biconstituent fiber has a
1.2 For definitions of other textile terms, refer to Terminol-
sheath-core, bilateral, or matrix configuration.
ogy D 123.
tricomponent fiber, n—a fiber consisting of three polymers
which are chemically different, physically different, or any
2. Referenced Documents
combination of such differences.
2.1 ASTM Standards:
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D 123 Terminology Relating to Textiles
Physical Arrangement of Components
Generic Class
lateral, adj—a descriptive term for a textile fiber composed of
two or more polymers at least two of which have a
3. Terminology
continuous longitudinal external surface.
sheath-core, adj—a descriptive term for a multicomponent
genericclass, n—as used with textile fibers, a grouping having
similar chemical compositions or specific chemical charac- textile fiber consisting of a continuous envelope which
encases a continuous, central, internal region. (See also
teristics.
component.)
DISCUSSION—In the United States, the generic names and definitions
of man-made fibers, such as nylon, polyester, and acrylic, are published
DISCUSSION—Both the sheath and the core can consist of more than
by the FederalTrade Commission in “Rules and Regulations Under the
one component arranged laterally, concentrically, or in matrix.
Textile Fiber Products Identification Act.” Technically, fibers may be
matrix, adj—a descriptive term for a textile fiber in which one
bigeneric, trigeneric, etc.
ormorepolymericfibrousmaterial(s)isdispersedinanother.
Components
Order for Naming Multicomponent Fibers
polymer, n—a macromolecular material formed by the chemi-
1. Trademark.
cal combination of monomers having either the same or
2. Physical arrangement of components: bilateral, matrix,
different chemical composition.
sheath-core.
component, n—as used with textile fiber polymers, a polymer
3. Number of components: bicomponent, tricomponent, etc.
with distinguishable properties.
4. Number of generic classes: monogeneric, bigeneric,
trigeneric, etc.
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5. Subparts 1 through 4 to be separated by commas.
ThisterminologyisunderthejurisdictionofASTMCommitteeD13onTextiles
and is the direct responsibility of Subcommittee D13.57 on Fiber Test Methods,
6. Generic class(es): polyester, nylon, spandex, etc.
General.
7. Makeup of generic classes:
Current edition approved Jan. 10, 2002. Published May 2002. Originally
1 (a) Generic class(es) in parentheses.
published as D 4466 – 85e . Last previous edition D 4466 – 94.
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Annual Book of ASTM Standards, Vol 07.01.
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D4466–02
(b) For matrix structures—Generic classes to be sepa- 9. Name the fiber in the form in which it is produced rather
rated by a hyphen. than after any subsequent treatment(s) that might separate the
(c) For lateral structures—Generic classes to be sepa-
components.
rated by a slash mark (/) (virgule).
(d) For sheath-core structures—Generic classes to be
4. Keywords
separat
...