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ASTM D4745-11ae1

(Specification)

Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials

Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials

ABSTRACT
This specification covers polytetrafluoroethylene(PTFE) filled molding compounds made with virgin PTFE resins defined in a certain specification except Types I, IV, V, and VI. PTFE compounds are classified into two types which are Type I as the nonpelletized material use for general purpose compression molding and Type II as the pelletized or free-flowing material use for molding, automatic molding or ram extrusion. Each type is further classified into thirteen grades distinguished by the nature of the filler. Different tests shall be conducted in order to determine the following properties: filler content, bulk density, specific gravity, and tensile properties.
SCOPE
1.1 This specification covers polytetrafluoroethylene (PTFE) filled molding compounds made with virgin PTFE resins defined in Specification D4894, as Types II and III.
Note 1—This specification can be used as a model for other PTFE compounds having particulate fillers that can survive the sintering temperatures of PTFE as can those listed in this specification. This specification is restricted to virgin PTFE base resin for technical reasons. Recycled or reprocessed material cannot be processed successfully.
Note 2—The properties measured on commercially fabricated parts may differ from the listed values for samples prepared by the procedures given in this specification, depending on part geometry and processing parameters.
1.2 The values stated in SI units are to be regarded as standard.
1.3 The following statement applies 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 and health practices and determine the applicability of regulatory limitations prior to use. See Note 5 for a specific warning statement.
Note 3—There is no known ISO equivalent to this standard.

General Information

Status
Historical
Publication Date
30-Nov-2011
ICS
83.140.99 - Other rubber and plastics products
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D4745-11a - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
Effective Date
01-Dec-2011
Replaced By
ASTM D4745-14 - Standard Classification System and Basis for Specification
 for Filled Polytetrafluoroethlyene (PTFE) Molding and Extrusion Materials Using ASTM Methods
Effective Date
01-Aug-2014
Referred By
ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
Effective Date
01-Dec-2011
Referred By
ASTM D4894-19 - Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
Effective Date
01-Dec-2011

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ASTM D4745-11ae1 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion MaterialsASTM D4745-11ae1 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
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ASTM D4745-11ae1 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
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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
´1
Designation:D4745 −11a
StandardSpecification for
Filled Compounds of Polytetrafluoroethylene (PTFE)
1
Molding and Extrusion Materials
This standard is issued under the fixed designation D4745; 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.
1
´ NOTE—Editorially corrected the text in Fig. 2 in January 2012.
1. Scope* D1708TestMethodforTensilePropertiesofPlasticsbyUse
of Microtensile Specimens
1.1 This specification covers polytetrafluoroethylene
D3892Practice for Packaging/Packing of Plastics
(PTFE) filled molding compounds made with virgin PTFE
D4894 Specification for Polytetrafluoroethylene (PTFE)
resins defined in Specification D4894, as Types II and III.
Granular Molding and Ram Extrusion Materials
NOTE 1—This specification can be used as a model for other PTFE
IEEE/ASTM SI-10Standard for Use of the International
compounds having particulate fillers that can survive the sintering
3
System of Units (SI): The Modern Metric System
temperatures of PTFE as can those listed in this specification. This
specification is restricted to virgin PTFE base resin for technical reasons.
3. Terminology
Recycled or reprocessed material cannot be processed successfully.
NOTE 2—The properties measured on commercially fabricated parts
3.1 Definitions—The terminology given in Terminology
may differ from the listed values for samples prepared by the procedures
D883 is applicable to this specification unless otherwise
given in this specification, depending on part geometry and processing
specified.
parameters.
3.2 Definitions of Terms Specific to This Standard:
1.2 The values stated in SI units are to be regarded as
3.2.1 bulk density, n—themassinkilogramspercubicmetre
standard.
of resin compound measured under the conditions of the test.
1.3 The following statement applies to the test method
3.2.2 filled compound, n—blendofPTFEresinasthematrix
portion, Section 11, of this specification: This standard does
and particulate fillers, generally glass, other inorganic,
not purport to address all of the safety concerns, if any,
metallic, or polymeric materials that withstand the sintering
associated with its use. It is the responsibility of the user of this
temperature of PTFE (327 to 380°C).
standard to establish appropriate safety and health practices
and determine the applicability of regulatory limitations prior 3.2.3 free-flow resins (pelletized), n—generally made by
to use. See Note 5 for a specific warning statement. treatment of finely divided resins to produce free-flowing
agglomerates.
NOTE 3—There is no known ISO equivalent to this standard.
3.2.4 lot, n—one production run.
2. Referenced Documents
3.2.5 pigmented compound, n—a compound in which a
2
2.1 ASTM Standards: pigment is added for colorant purposes only.
D792Test Methods for Density and Specific Gravity (Rela-
3.2.6 standard flow resins (nonpelletized), n—finely divided
tive Density) of Plastics by Displacement
resin with an average particle size less than 100 µm.
D883Terminology Relating to Plastics
3.3 Abbreviations—Abbreviations are in accordance with
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
Terminology D1600. PTFE is the acronym for polytetrafluo-
tics
roethylene.
4. Classification
1
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 This specification covers the following two types of
Materials.
PTFE compounds:
Current edition approved Dec. 1, 2011. Published December 2011. Originally
4.1.1 Type I—Standard flow resins (nonpelletized) material,
approved in 1991. Last previous edition approved in 2011 as D4745-11. DOI:
10.1520/D4745-11A.
for general-purpose compression molding.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters, 100 Barr Harbor Drive,
the ASTM website. West Conshohocken, PA 19428
*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
1

---------------------- Page: 1 ----------------------
´1
D4745−11a
TABLE 1 TFE Compounds, Type I, Standard Flow (Nonpelletized)
Molded Parts (Molded and Sintered)
Raw Resin
Specific Gravity, Specific Gravity,
Grade Bulk Density, Tensile Strength
Elongation, min,
min max
min, g/L
%
min, MPa min, psi
1 15 % glass fiber 400 2.150 2.250 19.6 2840 220
2 25 % glass fiber 425 2.150 2.25
...

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SCOPE
1.1 This classification system covers polyphthalamide (PPA) materials suitable for injection molding.  
1.2 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5.  
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1.4 This classification system is intended to be a means of calling out plastics materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastics field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this classification system.  
1.5 The values stated in SI units are to be regarded as the standard (see IEEE/ASTM SI-10). The values given in parentheses are for information only.  
1.6 The following precautionary caveat pertains only to the test methods portion, Section 11, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 11.7.1.
Note 1: There is no known ISO equivalent to this standard. ISO 16396-1/-2 for polyamides may also be used to describe and classify these PPA materials, but the technical content is significantly different.
Note 2: ASTM Standard D6779 on polyamide materials also includes PPA materials in its coverage of various polyamide chemistries. This standard gives additional information for classification and specification for PPA compositions classified as Group 10 (PA6T/66), Group 12 (PA6T/6I/66) and Group 13 (PA6T/6I) in ASTM Standard D6779 and includes provisions for other PPA compositions to utilize the classification presented.  
1.7 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.

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ASTM
ASTM D3294-22(Specification)
Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes

ABSTRACT
This specification establishes the requirements and test methods for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet manufactured from polytetrafluoroethylene (PTFE) resin molding materials and molded basic shapes made from resin molding and extrusion materials. The sheet or molded basic shape shall be made from unpigmented PTFE and shall be free from foreign matters. Each of the samples shall undergo visual and dimensional inspection to verify their compliance with the standard requirements. The specimens shall conform to the following physical and electrical property requirements: tensile strength; elongation; dielectric strength; specific gravity; porosity; and melting point. Examination for internal defects shall also be conducted to ensure that the specimens are free from microscopic cracks, voids, inclusions, and other surface defects that might affect the serviceability of the materials.
SCOPE
1.1 This specification establishes requirements and methods of test for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet in minimum thicknesses of 0.794 mm (1/32 in.) manufactured from PTFE resin molding materials defined in Specification D4894.  
1.2 This specification also establishes requirements for molded basic shapes made from molding materials. This specification is for products 300 mm (12 in.) or less in a dimension parallel to and 12.7 mm (0.5 in.) or greater in the dimension perpendicular to the direction of the applied molding pressure.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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. Special attention is called to 13.2, 13.3, 13.6, 13.8, and A1.  
Note 1: There is no known ISO equivalent to this standard.  
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.

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