ASTM D2116-07(2012)
(Specification)Standard Specification for FEP-Fluorocarbon Molding and Extrusion Materials
Standard Specification for FEP-Fluorocarbon Molding and Extrusion Materials
ABSTRACT
This specification covers melt-processible molding and extrusion materials of FEP-fluorocarbon resin, which is a copolymer of tetrafluoroethylene and hexafluoropropylene or a modified FEP-fluorocarbon resin containing not more than 2% by weight of other fluoromonomers. Four types of FEP-fluorocarbon resin are included in this specification which shall be supplied in pellet form and shall be of uniform composition and free of foreign matters. Tests shall be conducted on the molded test specimens wherein the average test result of the lot shall conform to the melt flow rate, specific gravity, melting point, tensile strength, elongation, dielectric constant, and dissipation factor requirements.
SCOPE
1.1 This specification covers melt processable molding and extrusion materials of FEP-fluorocarbon resin. This specification does not cover recycled FEP materials. These FEP resins are copolymers of tetrafluoroethylene and hexafluoropropylene or modified FEP-fluorocarbon resins containing not more than 2 % by weight of other fluoromonomers.
1.2 The values stated in SI units as detailed in are to be regarded as the standard. The values given in parentheses are for information only.
Note 1—Although this specification and ISO 12086-1 and ISO 12086-2 differ in approach or detail, data obtained using either are technically equivalent.
1.3 The following precautionary caveat pertains only to the test methods 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D2116 −07(Reapproved 2012)
Standard Specification for
FEP-Fluorocarbon Molding and Extrusion Materials
This standard is issued under the fixed designation D2116; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
tics
1.1 This specification covers melt processable molding and
D3295Specification for PTFE Tubing, Miniature Beading
extrusion materials of FEP-fluorocarbon resin. This specifica-
and Spiral Cut Tubing
tion does not cover recycled FEP materials. These FEP resins
D3418Test Method for Transition Temperatures and En-
arecopolymersoftetrafluoroethyleneandhexafluoropropylene
thalpies of Fusion and Crystallization of Polymers by
or modified FEP-fluorocarbon resins containing not more than
Differential Scanning Calorimetry
2% by weight of other fluoromonomers.
D3892Practice for Packaging/Packing of Plastics
1.2 The values stated in SI units as detailed in IEEE/
E691Practice for Conducting an Interlaboratory Study to
ASTMSI-10 are to be regarded as the standard. The values
Determine the Precision of a Test Method
given in parentheses are for information only.
IEEE/ASTMSI-10Use of the International System of Units
(SI): The Modern Metric System
NOTE 1—Although this specification and ISO 12086-1 and
ISO12086-2 differ in approach or detail, data obtained using either are
2.2 ISO Standards:
technically equivalent.
ISO 12086-1 Plastics—Fluoropolymer Dispersions and
1.3 The following precautionary caveat pertains only to the
Moulding and Extrusion Materials—Part 1
test methods portion, Section 11, of this specification.This ISO 12086-2 Plastics—Fluoropolymer Dispersions and
standard does not purport to address all of the safety concerns,
Moulding and Extrusion Materials—Part 2
if any, associated with its use. It is the responsibility of the user
3. Terminology
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
3.1 Definitions:
tions prior to use.
3.1.1 General—The definitions given in Terminology D883
are applicable to this specification.
2. Referenced Documents
3.1.2 lot, n—one production run or a uniform blend of two
2.1 ASTM Standards:
or more production runs.
D150Test Methods forAC Loss Characteristics and Permit-
3.2 Abbreviated Terms:
tivity (Dielectric Constant) of Solid Electrical Insulation
3.2.1 General—The abbreviated terms given in Terminol-
D618Practice for Conditioning Plastics for Testing
ogy D1600 are applicable to this specification.
D638Test Method for Tensile Properties of Plastics
D792Test Methods for Density and Specific Gravity (Rela-
4. Classification
tive Density) of Plastics by Displacement
4.1 This specification covers four types of FEP-
D883Terminology Relating to Plastics
fluorocarbon resin supplied in pellet form classified according
D1238Test Method for Melt Flow Rates of Thermoplastics
to their melt flow rate.
by Extrusion Plastometer
4.2 A one-line system shall be used to specify materials
covered by this specification.The system uses predefined cells
This specification is under the jurisdiction of ASTM Committee D20 on
to refer to specific aspects of this specification, illustrated as
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
follows:
Materials.
Current edition approved April 1, 2012. Published June 2012. Originally
approved in 1962. Last previous edition approved in 2007 as D2116–07. DOI:
10.1520/D2116-07R12.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2116−07 (2012)
8. Test Specimens
Specification
Standard Number : Type : Special
8.1 Prepare a molded sheet 1.5 6 0.3 mm (0.060 6 0.010
Block : : notes
in.) thick. Use a picture-frame-type chase having a suitable
:: :
blanked-outsectionandthicknesstoproducethedesiredsheet.
–––––––––––– ––– ,––––
Example: Specification D2116 – XX, I
Use clean aluminum foil, 0.13 to 0.18 mm (0.005 to 0.007 in.)
thick, in contact with the resin. A high-temperature mold
For this example, the line callout would be Specification
release agent shall be sprayed on the aluminum foil to help
D2116–XX, I and would specify an FEP-fluorocarbon resin
prevent the foil from sticking to the sheet. Use steel molding
thathasallofthepropertieslistedforthattype,grade,andclass
plates at least 1.0 mm (0.040 in.) thick and of an area adequate
in the appropriate specified properties or tables, or both, in the
to cover the chase.
specification identified. A comma is used as the separator
8.2 Lay down and smoothly cover one plate with a sheet of
between the standard number and the type. A provision for
aluminum foil. Place the mold chase on top of this assembly.
special notes is included so that other information can be
Place within the mold chase sufficient molding material to
provided when required. When special notes are used, precede
produce the required sheet in such a manner that the polymer
them with a comma.
charge is a mound in the middle of the chase. Place a second
sheet of aluminum foil on top of the granules and add the top
5. General Requirements
moldplate.Placetheassemblyinacompressionmoldingpress
5.1 The materials shall be of uniform composition and so
having platens that have been heated to 372 6 5°C (702 6
prepared as to conform to the requirements of this specifica-
9°F).
tion.
8.3 Bring the platens to incipient contact with the mold
5.2 The material described in this specification shall be free
assembly. Hold for 2 to 4 min without pressure. Apply
of foreign matter to such a contamination level as is agreed
approximately1MPa(145psi)andholdfor1to1.5min.Then
upon between the purchaser and the seller.
apply 2 to 4 MPa (290 to 580 psi) and hold for 1 to 1.5 min.
Maintain the press at 372 6 5°C (702 6 9°F) during these
TABLE 1 Detail Requirements for Test on Molding Materials
steps. Remove the assembly from the press and place between
Type Type Type Type
two 20 6 7-mm (0.75 6 0.25-in.) steel plates whose tempera-
I II III IV
ture is less than 40°C (104°F).
Melt flow rate, g/10 min:
Load, 5000 g:
8.4 When the sheet is cool enough to touch (about 50 to
Min 4.0 >12.0 0.8 2.0
60°C(122to140°F)),removealuminumfoilfromthesheet.(If
Max 12.0 . 2.0 3.9
thesheetisallowedtocooltoroomtemperature,thealuminum
foil cannot be pulled free.)
6. Detail Requirements
9. Conditioning
6.1 The average test result of the lot shall conform to the
9.1 For tests of specific gravity and tensile properties,
requirements prescribed in Table 1 and Table 2 when tested by
condition the molded test specimens in accordance with
the procedures specified herein. Table 2 lists those tests
ProcedureAof Practice D618 for a period of at least 4 h prior
requiring a specimen molded as described in Section 8.
to test. The other tests require no conditioning.
9.2 ConducttestsattheStandardLaboratoryTemperatureof
7. Sampling
23 6 2°C (73.4 6 3.6°F) for determination of specific gravity
7.1 Sampling shall be statistically adequate to satisfy re-
and tensile properties only. Since this resin does not absorb
quirements of 13.1.1.
water, the maintenance of constant humidity during testing is
not necessary. Conduct tests for melt flow rate and melting
See the ASTM Form and Style Manual, available from ASTM Headquarters. point under ordinary laboratory conditions.
TABLE 2 Detail Requirements for Molded Test Specimens
Type I Type II Type III Type IV
Specific gravity 23/23°C (73/73°F)
Min 2.12 2.12 2.12 2.12
Max 2.17 2.17 2.17 2.17
Melting point, °C 260 ± 20 260 ± 20 260 ± 20 260 ± 20
Tensile strength, 23°C (73°F), min:
MPa 17.3 14.5 20.7 18.7
psi 2500 2100 3000 2700
Elongation, 23°C (73°F), min, % 275 240 275 275
Dielectric constant, max:
At 10 Hz 2.15 2.15 2.15 2.15
At 10 Hz 2.15 2.15 2.15 2.15
Dissipation factor, max:
At 10 Hz 0.0003 0.0003 0.0003 0.0003
At 10 Hz 0.0007 0.0009 0.0007 0.0007
D2116−07 (2012)
10. Packaging and Marking (0.875 6 0.005 in.), and the speed of testing shall be 50 6 5
mm/min (2 6 0.2 in./min). Clamp the specimen with essen-
10.1 Packaging—The resin pellets shall be packaged in
tiallyequallengthsineachjaw.Determinetheelongationfrom
standard commercial containers so constructed as to ensure
the chart, expressing it as a percentage of the initial jaw
acceptance by common or other carriers for safe transportation
separation.
to the point of delivery, unless otherwise specified in the
contract or order.
NOTE 2—In determining elongation from the chart, drop a pe
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