ASTM D3368-17(2022)
(Specification)Standard Specification for FEP Sheet and Film
Standard Specification for FEP Sheet and Film
ABSTRACT
This specification covers unfilled, unpigmented FEP-fluorocarbon resin sheet and film. The sheet and film shall be made from FEP-fluorocarbon resin without filler or plasticizer. This specification allows for the use of recycled, reprocessed, and reworked FEP materials provided that: the final physical, mechanical, and performance requirements are met; and the toxicological characteristics are essentially unaltered from that of virgin material. The tensile strength, elongation at break, dimensional change on heating, cementability, dielectric strength, and density of the sheet and film shall be tested.
SCOPE
1.1 This specification covers unfilled, unpigmented FEP resin sheet and film less than 3.175 mm (0.125 in.) thick. Recycled materials are allowed in accordance with 6.2.
1.2 The values stated in SI units as detailed in IEEE/ASTM SI 10 are to be regarded as standard and the practices of IEEE/ASTM SI 10 incorporated herein.
1.3 The following safety hazards caveat pertains only to the test methods portion, Section 14, 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: There is no known ISO equivalent to this standard.
1.4 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: D3368 −17 (Reapproved 2022)
Standard Specification for
FEP Sheet and Film
This standard is issued under the fixed designation D3368; 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 D792Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers unfilled, unpigmented FEP
D882Test Method for Tensile Properties of Thin Plastic
resin sheet and film less than 3.175 mm (0.125 in.) thick.
Sheeting
Recycled materials are allowed in accordance with 6.2.
D883Terminology Relating to Plastics
1.2 The values stated in SI units as detailed in IEEE/ASTM
D2116Specification for FEP Resin Molding and Extrusion
SI 10 are to be regarded as standard and the practices of
Materials
IEEE/ASTM SI 10 incorporated herein.
D3892Practice for Packaging/Packing of Plastics
1.3 The following safety hazards caveat pertains only to the
D5740Guide for Writing Material Standards in the Classi-
test methods portion, Section 14, of this specification: This fication Format
standard does not purport to address all of the safety concerns,
E691Practice for Conducting an Interlaboratory Study to
if any, associated with its use. It is the responsibility of the user Determine the Precision of a Test Method
of this standard to establish appropriate safety, health, and
IEEE/ASTM SI 10Standard for Use of the International
environmental practices and determine the applicability of System of Units (SI)
regulatory limitations prior to use.
2.2 Other Standard:
TAPPI411StandardThickness(Caliper)ofPaperandPaper
NOTE 1—There is no known ISO equivalent to this standard.
Products
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- 3. Terminology
ization established in the Decision on Principles for the
3.1 Definitions:
Development of International Standards, Guides and Recom-
3.1.1 For definitions of terms used in this specification, see
mendations issued by the World Trade Organization Technical
Terminology D883.
Barriers to Trade (TBT) Committee.
3.1.2 lot, n—one production run or a uniform blend of two
or more production runs.
2. Referenced Documents
2 4. Classification
2.1 ASTM Standards:
4.1 This specification covers four types of FEP sheet and
D149Test Method for Dielectric Breakdown Voltage and
DielectricStrengthofSolidElectricalInsulatingMaterials film:
4.1.1 Type I—General purpose.
at Commercial Power Frequencies
D374/D374MTest Methods for Thickness of Solid Electri- 4.1.2 Type II—Cementable film. Type II materials can be
subdivided into two grades:
cal Insulation
D618Practice for Conditioning Plastics for Testing 4.1.2.1 Grade 1—One side cementable, and
4.1.2.2 Grade 2—Two sides cementable.
D638Test Method for Tensile Properties of Plastics
4.1.3 Type III—Special film for applications requiring un-
usual flexural endurance or extreme thermal and chemical
service.
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
4.1.4 Type IV—Film for mold release applications.
Materials (D20.15.12 on Fluoropolymers).
4.2 Aline callout system is used to specify materials in this
Current edition approved March 15, 2022. Published March 2022. Originally
approved in 1975. Last previous edition approved in 2017 as D3368-17. DOI:
standard. The system uses predefined cells to refer to specific
10.1520/D3368-17R22.
aspects of this specification, which are illustrated as follows:
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 from TechnicalAssociation of the Pulp and Paper Industry (TAPPI),
the ASTM website. 15 Technology Parkway South, Norcross, GA 30092, http://www.tappi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3368 − 17 (2022)
TABLE 1 Detail Requirements for Property Values
Type I Type II Type III Type IV
Tensile Strength, min, MPa (psi), at nominal thickness, mm (in.):
0.0127 (0.0005) 13.8 (2000) 13.8 (2000) . 11.0 (1600)
0.025 to 3.175 (0.001 to 0.125) 17.2 (2500) 17.2 (2500) 17.2 (2500) 14.5 (2100)
Elongation at Break, min, %, at nominal thickness, mm (in.):
0.0127 to 0.025 (0.0005 to 0.001) 175 175 . 150
0.051 to 3.175 (0.002 to 0.125) 250 250 250 250
Dimensional Change on Heating, max, %, at nominal thickness, mm (in.):
0.0127 to 0.025 (0.0005 to 0.001) ±5 ±5 . ±5
0.051 (0.002) ±3 ±3 ±4 ±3
0.076 to 0.508 (0.003 to 0.020) ±2 ±2 ±3 .
0.762 to 1.524 (0.030 to 0.060) . . ±4 .
2.285 to 3.175 (0.090 to 0.125) . . ±5 .
Cementability, min, peel strength, kg/m (g/in.), at nominal thickness, mm (in.):
0.0127 (0.0005) . 6.69 (170) . .
0.025 (0.001) . 11.8 (300) . .
0.051 (0.002) . 29.5 (750) . .
0.076 (0.003) . 31.5 (800) . .
0.102 (0.004) . 47.2 (1200) . .
0.127 (0.005) . 78.7 (2000) . .
0.254 (0.010) . 94.5 (2400) . .
0.508 (0.020) . 94.5 (2400) . .
Dielectric Strength, min, kV/mm (V/mil), at nominal thickness, mm (in.):
0.0127 to 0.025 (0.0005 to 0.001) 157 (4000) 157 (4000) . .
0.051 (0.002) 138 (3500) 138 (3500) . .
0.076 (0.003) 118 (3000) 118 (3000) . .
0.102 (0.004) 108 (2750) 108 (2750) . .
0.127 (0.005) 98 (2500) 98 (2500) . .
0.254 (0.010) 71 (1800) 71 (1800) . .
0.356 (0.014) 63 (1600) 63 (1600) . .
0.508 (0.020) 55 (1400) 55 (1400) . .
Density at 23°C, g/cm 2.13 to 2.17 2.13 to 2.17 2.13 to 2.17 2.13 to 2.17
purchaser and the manufacturer. The agreement shall apply
Specification
Standard Number Type Grade Class Special
also to the maximum number of splices per roll and tolerances
Block Notes
for length and core.
|| | | |
Example: Specification II 1 , 0.051 mm thick
5.3 Requests for certification or test results shall be made at
D3368 – XX,
the time of order placement.
For this example, the line callout would be Specification
D3368–XX,II1,0.051mmthick.Thiscalloutspecifiesafilm
6. Materials and Manufacture
of FEP that is cementable on one side and that has all of the
6.1 The sheet and film shall be made from FEP resin as
properties listed for that type and grade in the appropriate
specified in Specification D2116 without filler or plasticizer.
specified properties or tables, or both, in this specification.
Inclusion of a class is provided for in the system, but is not
6.2 This specification allows for the use of recycled,
used in this particular specification. A comma is used as the
reprocessed, and reworked FEPmaterials provided the follow-
separator between the standard number and the type. Separa-
ing:
tors are not needed between the type, grade, and class.
6.2.1 The final physical, mechanical, and performance re-
Provision for special notes is included in the system so that
quirements as stated in this specification are met.
other information can be provided when required, in this case,
6.2.2 The toxicological characteristics are essentially unal-
the thickness of the film. When special notes are used, they
tered from that of virgin material.
shall be preceded by a comma.
7. Other Requirements
5. Ordering Information
7.1 The sheet and film shall conform to the physical,
5.1 The sheet and film shall be furnished in the form of
mechanical, and performance property requirements specified
sheets or rolls in accordance with good commercial practice.
inTable1.Thenominalthicknessofsheetorfilmandthickness
Rolls shall be wound evenly and tightly on substantial cores
tolerances shall be in accordance with Table 2.
suitably restrained to prevent unwinding.
7.2 The film and sheet shall be uniform in appearance and
5.2 Dimensions of sheet and film with respect to length,
shall be sufficiently free of contamination, wrinkles, holes,
width, and core diameter shall be upon agreement between the
scratches, and other imperfections so as to be functionally
acceptable. The color shall be uniform and be characteristic of
unpigmentedsheetorfilmthatrangesfromcleartotranslucent
See the ASTM Form and Style Manual. Available from ASTM Headquarters. and is dependent upon the thickness.
D3368 − 17 (2022)
TABLE 2 Thickness and Tolerance Requirements
Thickness, mm (in.)
Nominal Thickness, Applicable
mm (in.) Types
min max
0.0127 (0.0005) I, II, IV 0.0089 (0.00035) 0.0165 (0.00065)
0.025 (0.001) I, II, IV 0.018 (0.0007) 0.033 (0.0013
0.051 (0.002) I, II, III 0.038 (0.0015) 0.064 (0.0025)
0.076 (0.003) I, II, III 0.057 (0.00225) 0.095 (0.00375)
0.102 (0.004) I, II, III 0.080 (0.00315) 0.123 (0.00485)
0.127 (0.005) I, II, III 0.102 (0.004) 0.152 (0.006)
0.254 (0.010) I, II, III 0.216 (0.0085) 0.292 (0.0115)
0.356 (0.014) I 0.320 (0.0126) 0.391 (0.0154)
0.508 (0.020) I, II, III 0.432 (0.017) 0.584 (0.023)
0.762 (0.030) I, III 0.648 (0.0255) 0.876 (0.0345)
1.016 (0.040) III 0.889 (0.0350) 1.143 (0.0450)
1.524 (0.060) III 1.372 (0.054) 1.676 (0.0660)
2.413 (0.095) III 2.172 (0.0855) 2.654 (0.1045)
3.175 (0.125) III 2.870 (0.113) 3.480 (0.137)
7.3 Tolerances for width of rolls shall be 61.6 mm 13. Reagents and Materials
(60.0625 in.) for film or sheet thickness less than 0.508 mm
13.1 Methyl Ethyl Ketone.
(0.020in.)and 63.2mm(60.125in.)forsheetthicknessequal
13.2 Acrylic Adhesive.
to or greater than 0.508 mm.
13.3 Anodized Aluminum, 0.5 mm (0.019 in.) thick. Other
8. Sampling sheet aluminum, either plain or anodized, should be satisfac-
tory if it can be shown that the peel failure of the seal is
8.1 Sampling shall be statistically adequate to satisfy the
between the treated film surface and the adhesive, and not
requirements of 15.4.
between the adhesive and the aluminum.
9. Number of Tests
14. Test Methods
9.1 One set of test specimens as prescribed in Section 10
14.1 Test Conditions—Unless otherwise specified, conduct
shall be considered sufficient for testing each batch. The
testsatthestandardlaboratorytemperatureof23 62°C(70to
average result of the specimens tested shall conform to the
77°F). Since this film and sheeting does not absorb water, the
requirements of this specification.
importance of constant humidity during testing is not impor-
tant.
10. Specimen Preparation
14.2 Specific Gravity—Determine the specific gravity on
10.1 Take test specimens across the width of film excluding
two specimens in accordance with MethodAof Test Methods
areas of wrinkles, folds, gel, and other obvious, visually
D792.Add two drops of a wetting agent (liquid detergent) to
determined, imperfections.
the water in order to reduce the surface tension and insure
complete wetting of the sample.
11. Conditioning
14.3 Tensile Properties:
11.1 For those tests where conditioning is required and
14.3.1 Film 0.254 mm (0.010 in.) or less in nominal
unlessotherwisespecifiedinthetestmethod,conditionthetest
thickness.
specimens in accordance with Procedure A of Practice D618
14.3.1.1 Determine the tensile strength and elongation in
for a period of at least 4 h prior to test.
accordance with Method A of Test Methods D882.
14.3.2 Sheet greater than 0.254 mm (0.010 in.) in nominal
12. Apparatus
thickness.
14.3.2.1 Cut five bars with the microtensile die shown in
12.1 Heat Sealer, single heated jaw with silicone rubber
Fig. 1. If the die is the steel rule type it shall have a curvature
pad, temperature range from 150 to 275°C (300 to 525°F),
5 1
of 5 6 0.8 mm ( ⁄32 6 ⁄32 in.). Tabs at each end of the die
pressure 138 kPa (20 psi), and dwell time 10 s.
longer than specified in Fig. 1 are allowed.
12.2 Rod, or other means for coating aluminum evenly
with adhesive.
No. 68040 acrylic adhesive from E. I. DuPont de Nemours & Co., Inc.,
Polymers, Wilmington, DE 19898, has been found satisfactory for this purpose.
Sentinel Model 12AS or 12-12AS, available from Packaging Industries Group, Alternative adhesive is allowed, if it leads to the same result.
Inc., 130 North St., Hyannis, MA02601, or equivalent, has been found satisfactory “Aldine” No. 1200, available from Alsco, Inc., 225 S. Forge St., Akron, OH
for this purpose. 44308, or equivalent, has been found satisfactory for this purpose.
6 9
No.24“DrawDown”rod,availablefromR.D.Specialities,Inc.,P.O.Box206, Examples of suitable wetting agents are “Glim” detergent, B. J. Babitt, Inc.;
Webster, NY 14580, has been found satisfactory for this purpose. “Joy”detergent,ProctorandGamble,Inc.;and“Triton”X-100,RohmandHaasCo.
D3368 − 17 (2022)
FIG. 1 Test Specimen and Die
14.3.2.2 Determinethetensilepropertiesinaccordancewith specimens immediately before and after oven heating. Each
the procedures described inTest Method D638, except that the
specimenshallbe101.6 61.6by101.6 61.6mm(4 6 ⁄16by
specimens shall be as detailed in 14.3.1 – 14.3.2.1, the initial 4 6 ⁄16 in.) and be freely suspended in an oven controlled at
jaw separation shall be 22.2 6 0.13 mm (0.875 6 0.005 in.),
200 6 3°C (392 6 5.4°F) for a minimum of 30 min.After the
andthespeedoftestingshallbe51mm/min(2in./min).Clamp heatingperiod,coolthespecimensto23 62°C(73.4 63.6°F),
the specimen with essentially equal lengths of the tabs in each
and remeasure them.
jaw. If an extensiometer is not available, the elongation at
14.6 Cementability—Seal the treated surface of the material
breakisdeterminedfromthechartrecord,expressingthevalue
by the application of controlled heat, pressure, and time of
as a percentage of the initial jaw separation. Average the test
dwell to an adhesive-coated strip of aluminum sheet. Measure
results. In making the test for tensile properties, a full-scale
the peel strength at a peel angle of 180°, and a speed of 30.5
load of 22.5 kg (50 lb) has been found suitable. If the
cm/min (12 in./min).
specimens break quickly, increase the chart speed so that the
14.6.1 Procedure for Preparation of Adhesive-Coated Alu-
chartrecordforeachspecimencoversatleast51mm(2in.)on
minum:
the time axis of the chart.
14.6.2 Coat sheets of aluminum 254 by 254 mm (10 by 10
NOTE 2—In determining elongation from the chart record, draw a
in.) evenly with No. 68040 adhesive using a No. 24 “Draw
perpendicular from the break point to
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