ASTM D1430-22

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it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1430 − 17 D1430 − 22
Standard Classification System for
Polychlorotrifluoroethylene (PCTFE) Plastics
This standard is issued under the fixed designation D1430; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This classification system covers polychlorotrifluoroethylene (PCTFE) plastics that consist of at least 90 % chlorotrifluoro-
ethylene and are suitable for extrusion and for compression and injection molding. Additional components allow for chemical
modifications, such as co-monomers, but not colorants, fillers, plasticizers, or mechanical blends with other resins. This
classification system does not cover recycled PCTFE materials.
1.2 The physical and electrical properties of parts molded or extruded from PCTFE molding compounds vary with the crystalline
content obtained during processing and subsequent annealing. Accordingly, the numerical values listed in Table 1 apply only to
the test specimens molded in accordance with Section 8. These values are not applicable as design criteria to semi-finished and
finished parts prepared and annealed under other conditions.
1.3 The values stated in SI units as detailed in IEEE/SI-10 are to be regarded as the standard. The values given in parentheses are
for information only.
1.4 The following precautionary statement pertains only to the test methods portion, Section 10, of this classification system:
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—Although this classification system and ISO 12086-1 (1995) and ISO 12086-2 (1995) 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.
2. Referenced Documents
2.1 ASTM Standards:
D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
D618 Practice for Conditioning Plastics for Testing
D621 Test Methods for Deformation of Plastics Under Load (Withdrawn 1994)
This classification system is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials (Section D20.15.12).
Current edition approved March 1, 2017March 15, 2022. Published March 2017March 2022. Originally approved in 1956. Last previous edition approved in 20162017
as D1430 – 11D1430 – 17.(2016). DOI: 10.1520/D1430-17.10.1520/D1430-22.
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 the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
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D1430 − 22
TABLE 1 Requirements for PCTFE Molded Test Specimens
Properties
Specific Zero Deformation Melting
F G
Dielectric Constant , max Dissipation Factor , max
A
Group Class Description Grade Strength Under Point,
Gravity,
B C,D E Khz MHz KHz MHz
23/23°C Time, s Load °C
01 1 homopolymer 1 2.10-2.15 100-199 10 210-220 2.70 2.50 0.030 0.012
2 2.10-2.15 200-299 10 210-220 2.70 2.50 0.030 0.012
3 2.10-2.15 300-450 10 210-220 2.70 2.50 0.030 0.012
2 modified
homopolymer 1 2.10-2.12 100-199 15 200-210 2.70 2.50 0.030 0.012
2 2.10-2.12 200-299 15 200-210 2.70 2.50 0.030 0.012
3 copolymer 1 2.08-2.10 100-199 20 190-200 2.70 2.50 0.035 0.015
2 2.07-2.10 200-299 25 190-200 2.70 2.50 0.035 0.015
0 other
A
See 10.1.7.
B
See 10.1.3.
C
See 10.1.4.
D
Maximum at 1112 N (250 lbf), 24 h, 70°C, %.
E
See 10.1.5.
F
See 10.1.6.
G
See 10.1.6.
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3418 Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential
Scanning Calorimetry
D3892 Practice for Packaging/Packing of Plastics
D4591 Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning
Calorimetry
D4895 Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
D7194 Specification for Aerospace Parts Machined from Polychlorotrifluoroethylene (PCTFE)
D7211 Specification for Parts Machined from Polychlorotrifluoroethylene (PCTFE) and Intended for General Use
IEEE/SI-10 Standard for Use of the International System of Units (SI): The Modern Metric System
2.2 ISO Standard:
ISO 12086-1ISO 20568-1 (1995) Plastics—Fluoropolymer Dispersions and Moulding and Extrusion Materials, Part 1
ISO 12086-2ISO 20568-2 (1995) Plastics—Fluoropolymer Dispersions and Moulding and Extrusion Materials, Part 2
3. Terminology
3.1 Definitions:
3.1.1 Definitions of terms used in this classification system shall be in accordance with Terminology D883.
3.1.2 lot, n—one production run or uniform blend of two or more production runs.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 preforming, n—a process to compress the material under pressure in a mold to form a preform.
3.2.2 zero strength time (ZST ), n—time measured in accordance with Section 10 of this classification system to check the relative
molecular weight of PCTFE material.
3.3 Abbreviations:
3.3.1 Abbreviated terms are in accordance with Terminology D1600.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D1430 − 22
4. Classification
4.1 PCTFE materials in powders and pellets are classified into one group. The group is subdivided into classes based on chemical
composition. These classes are subdivided into grades as shown in the Basic Property Table (Table 1).
An example of this classification system is given as follows:
Group 01 = PCTFE
Class 1 = homopolymer
Grade 2 = having properties per Table 1 (Grade 2)
4.1.1 To facilitate incorporation of future material the “other” category for group (01), class (0), and grade (0) are shown in Table
1.
5. General Requirements
5.1 The molding or extrusion material shall be of uniform composition and so compounded as to conform to the requirements of
this classification system.
6. Detail Requirements
6.1 Test specimens prepared in accordance with Section 9 shall conform to the requirements prescribed for the particular type and
grade in Table 1.
6.2 For finished PCTFE parts made from resin meeting Group 01, Class 1, Grade 3 requirements, and intended for aerospace use,
detail requirements given in Specification D7194 shall be followed.
6.3 For finished PCTFE parts made from resin Group 01, Class 1, Grade 0, 1, 2, or 3 requirements, and intended for general use,
detail requirements given in Specification D7211 shall be followed.
7. Sampling
7.1 Sampling shall be statistically adequate to satisfy the requirements of 11.4.
8. Number of Tests
8.1 One set of test specimens as prescribed in Section 9 shall be considered sufficient for testing each batch. The average result
for the specimens tested shall conform to the requirements prescribed in this classification system.
9. Specimen Preparation
9.1 Test specimens shall be cut from compression-molded sheets 1.58 6 0.08 mm (0.062 6 0.003 in.) thick, prepared from the
resins in the following manner:
9.1.1 Preforming—Powder resin shall be preformed prior to molding in the following way: Place 30 6 0.5 g of resin into a 57-mm
(2.25-in.) diameter positive-pressure compression mold and compress the material at room temperature into a preform having a
density of 1.4 to 1.5 g/cm . A pressure of 68.9 MPa (10 000 psi) will satisfactorily accomplish the densification.
9.1.2 Molding—Pelletized resin, granular resin, and preforms of powder resin shall be molded in the following way: Place the
preform prepared in accordance with 9.1.1 or 30 6 0.5 g of pelletized or granular resin on a 0.63-mm (0.025-in.) thick
chrome-plated metal plate and cover with a similar plate. Place spacers, 1.91 6 0.03 mm (0.075 6 0.001 in.) thick, between the
chrome-plated metal plates and far enough apart so that they do not interfere with the flow of the resin during molding. Place the
plates, with spacers and resin in place, between the platens of the press, the platens having been heated to a surface temperature
of 265 6 5°C. Close and continuously load the platens, following the rate of melting so that the plates reach the stops within 3
min after closing the press. Then apply sufficient pressure for 3 min more to mold a sheet of the required thickness. Immediately
after completion of the pressing, relieve the load, remove the plates and plastic sheet together, and at once quench them in cold
water (15 6 5°C) for 5 min, supporting the sandwich in a vertical position in the water. Then strip the 1.58 6 0.08-mm (0.062
6 0.003-in.) thick sheet from the metal plates. This sheet will be approximately 75 cm . Cut specimens from the center section
of each sheet, discarding any imperfectly molded edges.
D1430 − 22
10. Test Methods
10.1 The properties enumerated in this classification system shall be determined in accordance with the following test methods:
10.1.1 Conditioning—For those tests where conditioning is required, the molded test specimens shall be conditioned in accordance
with Procedure A of Practice D618.
10.1.2 Test Conditions—Tests shall be conducted in the standard laboratory atmosph
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