ASTM D7472-19(2024)
(Specification)Standard Specification for EFEP-Fluoropolymer Molding and Extrusion Materials
Standard Specification for EFEP-Fluoropolymer Molding and Extrusion Materials
ABSTRACT
This specification addresses the physical properties of melt processible molding and extrusion materials of EFEP-fluoropolymer, wherein the EFEP resin is a copolymer of ethylene, tetrafluoroethylene, and hexafluoropropylene. It does not cover blended and recycled materials. Covered here are two types of fluoropolymer that is supplied in pellet form and classified according to their melting points, while the resins of each type are divided into one to two grades in accordance with their melt flow rates. The materials shall be sampled in accordance with an adequate statistical sampling procedure and shall conform to specific gravity, melting point, melt flow rate, elongation, tensile strength, and dielectric constant and dissipation factor requirements when tested by the procedures itemized herein.
SCOPE
1.1 This specification covers melt processible molding and extrusion materials of EFEP-fluoropolymer. The EFEP resin is a copolymer of ethylene, tetrafluoroethylene, and hexafluoropropylene.
1.2 This specification does not cover blended materials and does not cover recycled materials.
1.3 The values stated in SI units as detailed in IEEE/ASTM SI-10 are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following safety hazards caveat pertains only to the test method portion, Section 11, of this specification. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: Although this specification and ISO 20568-1 and ISO 20568-2 differ in approach or detail, data obtained using either are technically equivalent.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7472 − 19 (Reapproved 2024)
Standard Specification for
EFEP-Fluoropolymer Molding and Extrusion Materials
This standard is issued under the fixed designation D7472; 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 D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers melt processible molding and
D883 Terminology Relating to Plastics
extrusion materials of EFEP-fluoropolymer. The EFEP resin is
D1238 Test Method for Melt Flow Rates of Thermoplastics
a copolymer of ethylene, tetrafluoroethylene, and hexafluoro-
by Extrusion Plastometer
propylene.
D1600 Terminology for Abbreviated Terms Relating to Plas-
1.2 This specification does not cover blended materials and 3
tics (Withdrawn 2024)
does not cover recycled materials.
D3418 Test Method for Transition Temperatures and Enthal-
1.3 The values stated in SI units as detailed in IEEE/ASTM pies of Fusion and Crystallization of Polymers by Differ-
ential Scanning Calorimetry
SI-10 are to be regarded as the standard. The values given in
parentheses are for information only. D3892 Practice for Packaging/Packing of Plastics
E177 Practice for Use of the Terms Precision and Bias in
1.4 The following safety hazards caveat pertains only to the
ASTM Test Methods
test method portion, Section 11, of this specification. This
IEEE/ASTM SI-10 Use of the International System of Units
standard does not purport to address all of the safety concerns,
(SI): The Modem Metric System
if any, associated with its use. It is the responsibility of the user
2.2 ISO Standards:
of this standard to establish appropriate safety, health, and
ISO 20568-1 Plastics—Fluoropolymer Dispersions and
environmental practices and determine the applicability of
Moulding and Extrusion Materials—Part 1
regulatory limitations prior to use.
ISO 20568-2 Plastics—Fluoropolymer Dispersions and
NOTE 1—Although this specification and ISO 20568-1 and
Moulding and Extrusion Materials—Part 2
ISO 20568-2 differ in approach or detail, data obtained using either are
technically equivalent.
3. Terminology
1.5 This international standard was developed in accor-
3.1 General—The terminology given in Terminology D883
dance with internationally recognized principles on standard-
is applicable to this specification.
ization established in the Decision on Principles for the
3.2 Definitions:
Development of International Standards, Guides and Recom-
3.2.1 lot, n—one production run or a uniform blend of two
mendations issued by the World Trade Organization Technical
or more production runs.
Barriers to Trade (TBT) Committee.
3.3 General—The abbreviated terms given in Terminology
2. Referenced Documents
D1600 are applicable to this specification.
2.1 ASTM Standards:
4. Classification
D150 Test Methods for AC Loss Characteristics and Permit-
tivity (Dielectric Constant) of Solid Electrical Insulation
4.1 This specification covers two types of fluoropolymer
D618 Practice for Conditioning Plastics for Testing
supplied in pellet form classified according to their melting
D638 Test Method for Tensile Properties of Plastics
points. The resins of each type are divided into one to two
grades in accordance with their melt flow rate.
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
Current edition approved April 1, 2024. Published April 2024. Originally
approved in 2009. Last previous edition approved in 2019 as D7472 – 19. DOI:
10.1520/D7472-19R24.
2 3
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 from American 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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D7472 − 19 (2024)
TABLE 2 Detail Requirements for Molded Test Specimens for All
4.2 An one-line system shall be used to specify materials
Resins in This Specification
covered by this specification. The system uses predefined cells
Type I II
to refer to specific aspects of this specification, as illustrated as
Grade 1 2 1
follows:
Tensile strength, 5800 4300 4300
Specification ___________________________
min, psi:
Standard Number : Type : Grade : Special
Elongation, min, 370 370 370
Block : : : Notes
%:
: : : ,:
Dielectric
Example: Specification D7472 - 09, I2
constant,
For this example, the line callout shall be, Specification 3
10 Hz, max: 2.6 2.6 2.6
D7472 – 09, I2 and shall specify a fluoropolymer that has all of 10 Hz, max: 2.6 2.6 2.6
Dissipation
the properties listed for that type and grade in the appropriate
factor,
specified properties, or tables, or both, in the specification 3
10 Hz, max: 0.001 0.001 0.001
identified. A comma is used as the separator between the 10 Hz, max: 0.01 0.01 0.01
standard number and the type. Separators are not needed
between the type and grade.
foil from sticking to the sheet. Use steel molding plates at least
1.0 mm (0.040 in.) thick and have an area adequate to cover the
5. General Requirements
chase.
5.1 The material shall be of uniform composition and so
8.2 Lay down and smoothly cover one plate with a sheet of
prepared as to conform to the requirements of this specifica-
aluminum foil. Place the mold chase on top of this assembly.
tion.
Place within the mold chase sufficient molding material to
5.2 The material described in this specification shall be free
produce the required sheet in such manner that the polymer
of foreign matter to such a contamination level as shall be
charge is a mound in the middle of the chase. Place a second
agreed upon between the purchaser and the seller.
sheet of aluminum foil on top of the granules and add the top
mold plate. Place the assembly in a compression molding press
6. Performance Requirements
having platens that have been heated to 265 6 5°C (509 6
6.1 The average test result of the lot shall conform to the
9°F).
requirements prescribed in Tables 1 and 2 when tested by the
8.3 Bring the press platens to incipient contact with the
procedures specified herein. Table 2 lists those tests requiring
mold assembly. Hold for 2 to 4 min without pressure. Apply
a specimen molded as described in Section 8.
approximately 1 MPa (145 psi) and hold for 1 to 1.5 min. Then
apply 2 to 4 MPa (290 to 580 psi) and hold for 1 to 1.5 min.
7. Sampling
Maintain the press at 265 6 5°C (509 6 9°F) during these
7.1 The materials shall be sampled in accordance with an
steps. Remove the assembly from the press and place between
adequate statistical sampling program.
two 20 6 7-mm (0.75 6 0.25-in.) steel plates whose tempera-
ture is less than 40°C (104°F).
8. Specimen Preparation
8.4 When the sheet is cool enough to touch about 50 to 60°C
8.1 Prepare a molded sheet 1.5 6 0.3 mm (0.06 6 0.01 in.)
(122 to 140°F), remove aluminum foil from the sheet. (If the
thick. Use a picture-frame-type chase having a suitable
sheet is allowed to cool to room temperature, the aluminum foil
blanked-out section and thickness to produce the desired shee
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