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ASTM D4745-97

(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

SCOPE
1.1 This specification covers polytetrafluoroethylene (PTFE) filled molding compounds made with virgin PTFE resins defined in Specification D 4894, except Types I, IV, V, and VI.
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 for technical reasons. Recycled 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.
Note 3—There is no ISO equivalent to this specification.
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 12, 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 9.5 and Note 4 for a specific warning statement.

General Information

Status
Historical
Publication Date
09-Nov-2001
ICS
83.140.99 - Other rubber and plastics products
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaced By
ASTM D4745-01 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
Effective Date
10-Nov-2001
Referred By
ASTM D4894-19 - Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
Effective Date
10-Nov-2001
Referred By
ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
Effective Date
10-Nov-2001

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ASTM D4745-97 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion MaterialsASTM D4745-97 - Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
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ASTM D4745-97 - 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 discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4745 – 97
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Filled Compounds of Polytetrafluoroethylene (PTFE)
1
Molding and Extrusion Materials
This standard is issued under the fixed designation D 4745; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope * D 1895 Test Methods for Apparent Density, Bulk Factor,
2
and Pourability of Plastic Materials
1.1 This specification covers polytetrafluoroethylene
2
D 1898 Practice for Sampling of Plastics
(PTFE) filled molding compounds made with virgin PTFE
3
D 3892 Practice for Packaging/Packing of Plastics
resins defined in Specification D 4894, except Types I, IV, V,
D 4894 Specification for Polytetrafluoroethylene (PTFE)
and VI.
4
Granular Molding and Extrusion Materials
NOTE 1—This specification can be used as a model for other PTFE
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
compounds having particulate fillers that can survive the sintering
5
poses
temperatures of PTFE as can those listed in this specification. This
E 380 Practice for the Use of the International System of
specification is restricted to virgin PTFE for technical reasons. Recycled
5
Units (SI)
material cannot be processed successfully.
NOTE 2—The properties measured on commercially fabricated parts E 691 Practice for Conducting an Interlaboratory Study to
5
may differ from the listed values for samples prepared by the procedures
Determine the Precision of a Test Method
given in this specification, depending on part geometry and processing
parameters.
3. Terminology
NOTE 3—There is no ISO equivalent to this specification.
3.1 Definitions—The terminology given in Terminology
1.2 The values stated in SI units as detailed in Practice
D 883 is applicable to this specification unless otherwise
E 380 are to be regarded as the standard and the practices of
specified.
E380 incorporated herein.
3.2 Definitions of Terms Specific to This Standard:
1.3 The following statement applies to the test method
3.2.1 bulk density, n—the mass in kilograms per cubic
portion, Section 12, of this specification: This standard does
metre of resin compound measured under the conditions of the
not purport to address all of the safety concerns, if any,
test.
associated with its use. It is the responsibility of the user of this
3.2.2 density, n—the mass per unit volume in air in milli-
standard to establish appropriate safety and health practices
grams per cubic metre (grams per cubic centimetre) of the
and determine the applicability of regulatory limitations prior
material at a temperature of 23 6 2°C (73.4 6 4°F).
to use. See 9.5 and Note 4 for a specific warning statement.
3.2.3 filled compound, n—blend of PTFE resin as the matrix
and particulate fillers, generally glass, other inorganic, metal-
2. Referenced Documents
lic, or polymeric materials that withstand the sintering tem-
2.1 ASTM Standards:
perature of PTFE (327 to 380°C).
D 618 Practice for Conditioning Plastics and Electrical
3.2.4 free-flow resins (pelletized), n—generally made by
2
Insulating Materials for Testing
treatment of finely divided resins to produce free-flowing
2
D 638 Test Method for Tensile Properties of Plastics
agglomerates.
D 792 Test Methods for Specific Gravity (Relative Density)
3.2.5 lot, n—one continuous production run or a uniform
2
and Density of Plastics by Displacement
blend of two or more production runs of the compound.
2
D 883 Terminology Relating to Plastics
3.2.6 pigmented compound, n—a compound in which a
D 1600 Terminology for Abbreviated Terms Relating to
pigment is added for colorant purposes only.
2
Plastics
3.2.7 standard flow resins (nonpelletized), n—finely divided
resin with an average particle size less than 100 μm.
3.3 Abbreviations—Abbreviations are in accordance with
1
This specification is under the jurisdiction of ASTM Committee D-20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
3
Current edition approved April 10, 1997. Published April 1998. Originally Annual Book of ASTM Standards, Vol 08.02.
4
published as D 4745 – 91. Last previous edition D 4745 – 91. Annual Book of ASTM Standards, Vol 08.03.
2 5
Annual Book of ASTM Standards, Vol 08.01. Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Changes section appears at the end of this standard.
1

---------------------- Page: 1 ----------------------
D 4745
Terminology D 1600. PTFE is the acronym for polytetrafluo- 6. Requirements
roethylene.
6.1 The PTFE compou
...

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1.1 This classification system covers requirements for plasticized cellulose acetate propionate thermoplastic compounds suitable for injection molding and extrusion. These compounds have a propionyl content less than 48 % and an acetyl content less than 3 % and can contain dyes and pigments. Cellulosic plastic materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those cellulosic materials, provided that all specific requirements of this classification system are met.  
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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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1.5 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.  
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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.

  • Technical specification
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  • Technical specification
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