ASTM D5675-04(2010)
(Specification)Standard Specification for Fluoropolymer Micropowders
Standard Specification for Fluoropolymer Micropowders
ABSTRACT
This classification system provides a method of adequately identifying PTFE micropowders using a system consistent with that also of another specific classification. These powders are sometimes known as lubricant powders which usually have a much smaller particle size than those used for molding or extrusion. The test methods and properties included are those required to identify and specify the various types of fluoropolymer micropowders. This classification covers two groups of fluoropolymer micropowders. Fluoropolymer micropowders are classified into groups according to their base fluoropolymer. These groups are further subdivided into classes and grades. Different tests shall be performed in order to determine the following properties of the micropowders: melting characteristics, melt flow rate, specific gravity, water content, particle size, surface area, and bulk density.
SCOPE
1.1 This classification system provides a method of adequately identifying PTFE micropowders using a system consistent with that of Classification System D4000. It further provides a means for specifying these materials by the use of a simple line callout designation. This classification covers fluoropolymer micropowders that are used as lubricants and as additives to other materials in order to improve lubricity or to control other characteristics of the base material.
1.2 These powders are sometimes known as lubricant powders. The powders usually have a much smaller particle size than those used for molding or extrusion, and they generally are not processed alone. The test methods and properties included are those required to identify and specify the various types of fluoropolymer micropowders. Recycled fluoropolymer materials meeting the detailed requirements of this classification are included (see Guide D5033).
1.3 These micropowders and the materials designated as filler powders (F) in ISO 12086-1 and ISO 12086-2 are equivalent.
1.4 The values stated in SI units as detailed in are to be regarded as the standard.
1.5 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. Specific precautionary statements are given in 7.1.2.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D5675 −04(Reapproved 2010)
Standard Classification for
Fluoropolymer Micropowders
This standard is issued under the fixed designation D5675; 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 D854 Test Methods for Specific Gravity of Soil Solids by
Water Pycnometer
1.1 This classification system provides a method of ad-
D883 Terminology Relating to Plastics
equately identifying PTFE micropowders using a system
D1238 Test Method for Melt Flow Rates of Thermoplastics
consistent with that of Classification System D4000. It further
by Extrusion Plastometer
provides a means for specifying these materials by the use of
D1600 Terminology forAbbreviatedTerms Relating to Plas-
a simple line callout designation. This classification covers
tics
fluoropolymer micropowders that are used as lubricants and as
D3892 Practice for Packaging/Packing of Plastics
additives to other materials in order to improve lubricity or to
D4000 Classification System for Specifying Plastic Materi-
control other characteristics of the base material.
als
1.2 These powders are sometimes known as lubricant pow-
D4464 Test Method for Particle Size Distribution of Cata-
ders. The powders usually have a much smaller particle size
lytic Material by Laser Light Scattering
than those used for molding or extrusion, and they generally
D4567 Test Method for Single-Point Determination of Spe-
are not processed alone. The test methods and properties
cificSurfaceAreaofCatalystsandCatalystCarriersUsing
included are those required to identify and specify the various
Nitrogen Adsorption by Continuous Flow Method
typesoffluoropolymermicropowders.Recycledfluoropolymer
D4591 Test Method for Determining Temperatures and
materials meeting the detailed requirements of this classifica-
Heats of Transitions of Fluoropolymers by Differential
tion are included (see Guide D5033).
Scanning Calorimetry
1.3 These micropowders and the materials designated as D4895 Specification for Polytetrafluoroethylene (PTFE)
Resin Produced From Dispersion
fillerpowders(F)inISO 12086-1andISO 12086-2areequiva-
lent. D5033 GuideforDevelopmentofASTMStandardsRelating
to Recycling and Use of Recycled Plastics (Withdrawn
1.4 The values stated in SI units as detailed in IEEE/ASTM
2007)
SI-10 are to be regarded as the standard.
D5740 Guide for Writing Material Standards in the Classi-
1.5 This standard does not purport to address all of the
fication Format
safety concerns, if any, associated with its use. It is the
IEEE/ASTM SI-10 Standard for Use of the International
responsibility of the user of this standard to establish appro-
System of Units (SI): The Modern Metric System
priate safety and health practices and determine the applica-
2.2 ISO Standards:
bility of regulatory limitations prior to use. Specific precau-
ISO 12086-1 Plastics-Fluoropolymer Dispersions and
tionary statements are given in 7.1.2.
MouldingandExtrusionMaterialsPart1:Designationand
System and Basis for Specification
2. Referenced Documents
ISO 12086-2 Plastics-Fluoropolymer Dispersions and
2.1 ASTM Standards:
Moulding and Extrusion Materials Part 2: Preparation of
Test Specimens and Determination of Properties
This classification is under the jurisdiction of ASTM Committee D20 on
3. Terminology
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials. 3.1 Definitions: The terminology given in Terminology
Current edition approved Sept. 1, 2010. Published November 2010. Originally
D883 is applicable to this classification unless otherwise
approved 1995. Last previous edition approved 2004 as D5675 - 04. DOI: 10.1520/
specified.
D5675-04R10.
Designations, specifications, and test methods are included in ISO 12086-1 and
12086-2.
3 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.astm.org.
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
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D5675−04 (2010)
3.1.1 bulk density, n—the mass per unit volume, in grams 4. Classification
per litre of a loosely packed material, such as a molding
4.1 This classification covers two groups of fluoropolymer
powder. D4895
micropowders. Fluoropolymer micropowders are classified
3.1.2 lot, n—one production run or uniform blend of two or
into groups according to their base fluoropolymer. These
more production runs. D4895
groups are further subdivided into classes and grades as shown
in Table 1.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 direct polymerization powder, n—PTFE material
NOTE 1—An example of this classification system is as follows:
based on polymerizations designed to produce low molecular
ThedesignationASTMD5675PTFE0111indicatesPTFEmicropowderin
weight PTFE resins with properties of materials described in
accordance with Specification D5675:
this standard. 01 = PTFE resin,
1 = suspension polymerization based, and
3.2.2 dispersion-based powder, n—PTFE material based on
1 = formerly Type I, Grade 1, Class A, in
the type of polymerization normally related to the production
Specification D5675 - 95a
of “paste or coagulated dispersion type” PTFE resins.
with a particle size of 1 to <10 µm
(average diameter), a surface area of
3.2.3 micropowder, n—white, free-flowing PTFE powders
0.8 to 4.5 m /g, and a
designed for use as additives in other materials or systems.
mass flow rate of >1 g/10 min using a load of 5 kg.
3.2.4 reground PTFE, n—PTFE material produced by
5. General Requirements
grinding polytetrafluoroethylene (PTFE) material that has been
preformed but has never been sintered.
5.1 Theresinshallbeuniformandshallcontainnoadditives
3.2.5 reprocessed PTFE, n—PTFE material produced by
or foreign material.
grinding PTFE material that has been both preformed and
5.2 The color of the material as shipped by the seller shall
sintered.
be white to gray.
3.2.6 sintering, n—as it applies to PTFE, a thermal treat-
ment during which the PTFE is melted and recrystallized by
6. Sampling
cooling, with coalescence occurring during the treatment.
6.1 Sampling shall be statistically adequate to satisfy the
3.2.7 suspension-based powder, n—PTFE material based on
requirements of 9.4.
the type of polymerization normally related to the production
of granular PTFE resins.
7. Sample Preparation
3.3 Abbreviations—Abbreviated terms are in accordance
with Terminology D1600. 7.1 Test Samples:
TABLE 1 Basic Properties
Particle Size,
A
Surface Area,
Melt-Flow Rate,
B
Group Description Class Description Grade Description Average Mass
g/10 min
m /g
Diameter, µm
C D
01 PTFE 1 suspension based 1 1to<10 0.8to4.5 >1 5
E
2 10 to 25 0.8 to 4.5 >0.1 10
F
2 dispersion based 1 1to<10 4.6to15 >1 5
G
2 10 to 30 4.6 to 15 >0.1 10
H
3 25 to 50 4.6 to 15 >1 5
I
4 50 to 150 4.6 to 15 >1 5
J
3 direct polymerization 1 2 to 15 4.6 to 15 >1 5
K
4 reground suspension 1 1to<10 0.8to4.5 >1 5
L
5 reground dispersion 1 1to25 0.8to4.5 >1 5
M
6 previously sintered 1 10 to 50 <1.5 >20 5
N O
02 FEP 1 1 10 to 30 4.6 to 15 4 to 12 5
A
Orifice diameter of 2.0955 mm and temperature of 372°C.
B
Kilogram load on plastometer.
C 3
Group 01 materials have a specific gravity of 2.10 to 2.30 g/cm , a water content (maximum) of <0.1 %, a melting point (peak temperature) of 315 to 340°C, and a bulk
density of 225 to 600 g/L.
D
Formerly Specification D5675–95a, Type I, Grade 1, Class A.
E
Formerly Specification D5675–95a, Type I, Grade 1, Class B.
F
Formerly Specification D5675–95a, Type I, Grade 2, Class A.
G
Formerly Spe
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