1、Designation: D 6779 07aStandard Classification System forPolyamide Molding and Extrusion Materials (PA)1This standard is issued under the fixed designation D 6779; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re
2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This classification system covers polyamide materialssuitable for molding and extrusion. Some of these composi-tions are al
3、so suitable for application from solution.1.2 This classification system allows for the use of recycledpolyamide materials provided that the requirements as stated inthis classification system are met. The proportions of recycledmaterial used, as well as the nature and amount of anycontaminant, howe
4、ver, cannot be covered practically in thisspecification.1.3 The properties included in this classification system arethose required to identify the compositions covered. There maybe other requirements necessary to identify particular charac-teristics important to specialized applications. These may
5、bespecified by using the suffixes as given in Section 5.1.4 This classification system and subsequent line callout(specification) are intended to provide a means of calling outplastic materials used in the fabrication of end items or parts.It is not intended for the selection of materials. Materials
6、election should be made by those having expertise in theplastic field after careful consideration of the design and theperformance required of the part, the environment to which itwill be exposed, the fabrication process to be employed, thecosts involved, and the inherent properties of the material
7、otherthan those covered by this classification system.1.5 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.6 The following precautionary caveat pertains only to thetest methods portion, Section 11, of this classification system
8、.This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatoryrequirements prior to use.NOTE 1This classifica
9、tion system is similar to ISO 1874-1/-2,although the technical content is significantly different.2. Referenced Documents2.1 ASTM Standards:2D 257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD 789 Test Methods for Determination of Solution Viscosi-ties of Polyamide (PA)D 792
10、Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD 883 Terminology Relating to PlasticsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 3892 Practice for Packaging/Packing of PlasticsD 4000 Classification System for Specifying Plastic Mate-ria
11、lsD 6260 Test Method for Gravimetric Determination of Car-bon Black in Nylon Materials (PA)3E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 IEC/ISO Standards:4IEC 60243-1 Electrical Strength of Insulating MaterialsTest MethodsPart 1: Tests at Pow
12、er FrequenciesIEC 60250 Recommended Methods for the Determinationof the Permittivity and Dielectric Dissipation Factor ofElectrical Insulating Materials at Power, Audio and RadioFrequencies Including Metre WavelengthsISO 75-1 PlasticsDetermination of Temperature of De-flection Under LoadPart 1: Gene
13、ral Test MethodsISO 75-2 PlasticsDetermination of Temperature of De-flection Under LoadPart 2: Plastic and EboniteISO 179-1 PlasticsDetermination of Charpy ImpactStrengthPart 1: Non-instrumented Impact TestISO 294-1 PlasticsInjection Moulding of Test Specimensof Thermoplastic MaterialsPart 1: Genera
14、l Principles,Multipurpose-Test Specimens and BarsISO 307 Determination of Viscosity Number of PolyamidesIn Dilute Solutions1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current e
15、dition approved Sept. 15, 2007. Published November 2007. Originallyapproved in 2002. Last previous edition approved in 2007 as D 6779 - 07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
16、 information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Bar
17、r Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ISO 527-1 PlasticsDetermination of Tensile PropertiesPart 1: General PrinciplesISO 527-2 PlasticsDetermination of Tensile PropertiesPart 2: Testing ConditionsISO 1183 PlasticsMethods for Determining the Densityand Relative
18、Density of Non-Cellular PlasticsISO 1874-1 PlasticsPolyamide (PA) Homopolymers andCopolymers for Moulding and ExtrusionPart 1: Desig-nationISO 1874-2.2 PlasticsPolyamide (PA) Homopolymersand Copolymers for Moulding and ExtrusionPart 2:Preparation of Test Specimens and Determination ofPropertiesISO 3
19、167 Plastics, Multipurpose Test SpecimensISO 3451-4 PlasticsDetermination of AshPart 4:PolyamidesISO 11357-1 PlasticsDifferential ScanningCalorimetryPart 1: General PrinciplesISO 11357-3 PlasticsDifferential ScanningCalorimetryPart 3: Determination of Temperature andEnthalpy of Melting and Crystalli
20、zationISO 15512 PlasticsDetermination of Water Content3. Terminology3.1 The terminology used in this classification system is inaccordance with Terminologies D 883 and D 1600.4. Classification4.1 Polyamide materials are classified into groups in accor-dance with their composition. These groups are s
21、ubdivided intoclasses and grades as shown in the Basic Property Table (TablePA).NOTE 2An example of this classification system for unreinforcedpolyamide is given as follows: The designation PA0123 indicates thefollowing:PA = polyamide as found in Terminology D 1600,01 (group) = polyamide 66,2 (class
22、) = heat stabilized, and3 (grade) = with a minimum viscosity number of 210 andthe requirements given in Table PA.4.1.1 Grades of reinforced or filled versions, or both, of thebasic materials are identified by a single letter that indicates thereinforcement or filler used and two digits, in multiples
23、 of 5,that indicate the nominal quantity in percent by weight. Thus,a letter designation G for glass reinforced and 35 for percent orreinforcement, G35, specifies a material with a nominal glasslevel of 35 %. The reinforcement letter designations andassociated tolerance levels are shown as follows:S
24、ymbol MaterialTolerance(Based on the Total Mass)C carbon- and graphite-fiber-reinforced 62%G glass-reinforced 62%L lubricants (such as PTFE, graphite,silicone, and molybdenum disulfide)Depends upon material andprocessto be specified.M mineral-reinforced 62%R combinations of reinforcements orfillers,
25、 or both63%NOTE 3An example of this classification system for reinforcedpolyamide is given as follows: The designation PA012G35 indicates thefollowing:PA = polyamide as found in Terminology D 1600,01 (group) = polyamide 66,2 (class) = heat stabilized, andG35 (grade) = nominal 35 % glass with the req
26、uirementsgiven in Table PA.NOTE 4This part of the classification system uses percent of rein-forcements or additives, or both, in the callout of the modified basicmaterial. The types and percentages of reinforcements and additivesshould be shown on the suppliers technical data sheet unless they arep
27、roprietary in nature. If necessary, additional control of these reinforce-ments and additives can be accomplished by use of the suffix part of thesystem (see Section 5).NOTE 5Materials containing reinforcements or fillers, or both, atnominal levels not in multiples of 5 are included in the nearest P
28、A gradedesignation. For example, a material with a nominal glass fiber level of33 % is included with Grade G35 as shown in Note 4.NOTE 6Ash content of filled or reinforced materials may be deter-mined using Test Method ISO 3451-4.4.2 Variations of polyamide materials that are not in TablePA are clas
29、sified in accordance with Tables PA and A or B.Table PA is used to specify the group of polyamide and TableA or B is used to specify property requirements.4.2.1 Specific requirements for variations of polyamidematerials shall be shown by a six-character designator. Thedesignation will consist of the
30、 letter “A” or “B” and the fivedigits comprising the cell numbers for the property require-ments in the order as they appear in Tables A and B.4.2.1.1 Although the values listed are necessary to includethe range of properties available in existing material, usersshould not infer that every possible
31、combination of theproperties exists or can be obtained.4.2.2 When the grade of the basic material is not known, isnot important or does not meet the Table PA requirements, theuse of “0” grade classification shall be used for reinforcedmaterials in this classification system.NOTE 7An example of this
32、classification system for a reinforcedpolyamide material is given as follows. The designationPA0110G30A42270 would indicate the following material requirements:PA0110 = Polyamide 66, from Table PA,G30 = Glass reinforced at 30 % nominal,A = Table A property requirements,4 = Tensile strength, 140 MPa,
33、 min,2 = Tensile modulus, 4500 MPa, min,2 = Charpy impact, 5.0 kJ/m2, min,7 = Deflection temperature at 1.8 MPa, 200C, min,and0 = Unspecified.If no properties are specified, the designation would bePA0110G30A00000.NOTE 8When a grade of polyamide is not fully identified by astandard callout, it is po
34、ssible to specify all table properties by the use ofan addition of Classification D 4000 suffixes. Suffix values will overridethe PA table values. An example of an unreinforced polyamide material isgiven as follows: PA0212KN023. This example is a general purpose, lowD 6779 07a2viscosity PA6 material
35、 where K denotes tensile properties, N denotestensile modulus with ISO 527 as the test method, and 023 denotes a valueof 2300 MPa. This value for tensile modulus overrides the normal tablevalue. This example can be applied to replace all table values, that is,tensile stress, notched Charpy impact, a
36、nd heat deflection temperature.4.3 To facilitate the specification of special materials wherethe basic property table does not reflect the properties required,Table B has been incorporated into this classification system.This table will be used in a manner similar to Table A.NOTE 9Pigmented or color
37、ed polyamides can differ significantlyfrom the natural polymers in mechanical properties depending on thechoice of colorants and concentrations. The main property affected isductility, as illustrated by a reduction in Charpy impact and elongationvalues. In a typical white pigmented polyamide, elonga
38、tion losses of up to50 % and Charpy impact losses of up to 30 % are common. If specificproperties of pigmented materials are necessary, Table B may be em-ployed to specify property requirements.NOTE 10An example of a special material using this classificationsystem is as follows: The designation PA0
39、220B54220 would indicate thefollowing material requirements from Table B:PA0220 = Polyamide 6, heat stabilized, from Table PA,B = Table B property requirements,5 = Tensile strength, 70 MPa, min,4 = Tensile modulus, 2400 MPa, min,2 = Charpy impact, 4.0 kJ/m2, min,2 = Deflection temperature at 1.8 MPa
40、, 55C, min,and0 = unspecified.TABLE PA Requirements for Polyamides Dry-as-MoldedA,BGroup Description Class Description Grade DescriptionCViscosityNumber,ISO 307,min, mL/gDensity,DISO 1183g/cm3TensileStrength,ISO 527-1andISO 527-2,MPa, minTensileModulus,EISO 527-1andISO 527-2,MPa, minCharpyImpactResi
41、stance,ISO 179/1eA, kJ/m2,minDeflectionTemperature,FISO 75-1andISO 75-2,at 1.8 MPa,C, min01 PA66 1 General-purpose1 135 1.13 to 1.15 70 2300 3.3 602 165 1.13 to 1.15 70 2300 3.3 603 210 1.13 to 1.15 70 2300 3.3 604 270 1.13 to 1.15 70 2300 3.3 605 recycled 115 1.13 to 1.15 70 2300 3.3 606 recycled 1
42、35 1.13 to 1.15 70 2300 3.3 60G15 15 % glass . . . 1.20 to 1.26 100 4000 3.0 215G20 20 % glass . . . 1.25 to 1.33 115 5000 4.0 220G25 25 % glass . . . 1.29 to 1.37 140 6000 5.0 225G35 35 % glass . . . 1.35 to 1.45 170 8000 7.0 235G40 40 % glass . . . 1.42 to 1.52 175 9000 8.0 235G45 45 % glass . . .
43、 1.45 to 1.55 180 10 000 9.0 240M40 40 % mineral . . . 1.45 to 1.55 80 5000 2.0 1000 other2 Heat-stabilized1 135 1.13 to 1.15 70 2300 3.0 602 165 1.13 to 1.15 70 2300 3.0 603 210 1.13 to 1.15 70 2300 3.0 604 270 1.13 to 1.15 70 2300 3.0 605 recycled 115 1.13 to 1.15 70 2300 3.0 606 recycled 135 1.13
44、 to 1.15 70 2300 3.0 60G15 15 % glass . . . 1.20 to 1.26 100 4000 3.0 220G25 25 % glass . . . 1.29 to 1.37 140 6000 5.0 225G30 30 % glass . . . 1.32 to 1.42 160 7000 6.0 230G35 35 % glass . . . 1.35 to 1.45 170 8000 7.0 235G40 40 % glass . . . 1.43 to 1.53 175 9000 8.0 235G45 45 % glass . . . 1.45 t
45、o 1.55 180 10 000 9.0 240M40 40 % mineral . . . 1.45 to 1.55 80 5000 2.0 100R20 20 % filler . . . 1.23 to 1.31 70 3200 1.5 . . .R40 40 % filler . . . 1.43 to 1.53 100 5500 2.5 2000 other3 Nucleated 1 135 1.13 to 1.15 80 2500 2.8 602 165 1.13 to 1.15 80 2500 2.8 603 210 1.13 to 1.15 80 2500 2.8 604 2
46、70 1.13 to 1.15 80 2500 2.8 605 recycled 115 1.13 to 1.15 80 2500 2.8 606 recycled 135 1.13 to 1.15 80 2500 2.8 600 other4 Nucleated,heat-stabilized1 Requirements the same as corresponding grades under Group 01, Class 323450 other5 Impact-modified1 . . . 1.06 to 1.12 52 1700 9.0 502 recycled . . . 1
47、.06 to 1.12 50 1600 8.0 50G15 15 % glass . . . 1.15 to 1.23 85 3000 6.0 210G35 35 % glass . . . 1.31 to 1.41 110 5500 6.0 225D 6779 07a3TABLE PA Requirements for Polyamides Dry-as-MoldedA,BGroup Description Class Description Grade DescriptionCViscosityNumber,ISO 307,min, mL/gDensity,DISO 1183g/cm3Te
48、nsileStrength,ISO 527-1andISO 527-2,MPa, minTensileModulus,EISO 527-1andISO 527-2,MPa, minCharpyImpactResistance,ISO 179/1eA, kJ/m2,minDeflectionTemperature,FISO 75-1andISO 75-2,at 1.8 MPa,C, min0 other6 Impact-modified,heat-stabilized1 . . . 1.08 to 1.12 52 1700 9.0 502 recycled . . . 1.08 to 1.12
49、50 1600 8.0 50G15 15 % glass . . . 1.15 to 1.23 85 3000 6.0 210G35 35 % glass . . . 1.31 to 1.41 110 5500 6.0 225M40 40 % mineral . . . 1.45 to 1.55 75 4500 4.0 . . .R35 35 % filler . . . 1.38 to 1.48 80 5500 3.0 2000 other7 Toughened 1 . . . 1.06 to 1.10 42 1500 40 452 recycled . . . 1.05 to 1.11 40 1300 35 45G15 15 % glass . . . 1.15 to 1.23 70 2800 9.0 180G35 35 % glass . . . 1.28 to 1.38 110 5500 11 2200 other8 Tough-ened,heat-stabilized1 . . . 1.06 to 1.10 42 1500 40 452 recycled . . . 1.05 to 1.11 40 1300 35 45G15 15 % glass . . . 1.15
