1、Designation: D 6100 05Standard Specification forExtruded, Compression Molded and Injection Molded AcetalShapes (POM)1This standard is issued under the fixed designation D 6100; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis specification is intended to be a means of calling out plastic product used in the fabrication ofend items
3、 or parts.1. Scope*1.1 This specification covers requirements and test methodsfor the material, dimensions, and workmanship, and the prop-erties of extruded, compression molded and injection moldedacetal sheet, plate, rod, and tubular bar manufactured fromacetal.1.2 The properties included in this s
4、pecification are thoserequired for the compositions covered. Requirements neces-sary to identify particular characteristics important to special-ized applications may be described by using the classificationsystem given in Section 4.1.3 This specification allows for the use of recycled plasticsas de
5、fined in Guide D 5033.21.4 The values stated in inch-pound units are to be regardedas the standard in all property and dimensional tables. Forreference purposes, SI units are included in Table S-POM andTable 1 only.1.5 The following precautionary caveat pertains only to thetest method portions, Sect
6、ion 11, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prio
7、r to use.NOTE 1There is no similar or equivalent ISO Standard.2. Referenced Documents2.1 ASTM Standards:3D 256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD 618 Practice for Conditioning Plastics for TestingD 638 Test Method for Tensile Properties of PlasticsD 790 Test
8、 Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD 883 Terminology Relating to PlasticsD 3892 Practice for Packaging/Packing of PlasticsD 5033 Guide for the Development of ASTM StandardsRelating to Recycling and Use of Recycled PlasticsD 6778
9、 Classification System for Polyoxymethylene(POM), Acetal Molding and Extrusion Materials2.2 ANSI Standard:Z1.4-1993 Sampling Procedures and Tables for Inspectionby Attributes43. Terminology3.1 Definitions:3.1.1 regrind (plastic), na product or scrap such as sprues,runners and edge trim that have bee
10、n reclaimed by shreddingand granulating for use in-house.3.1.2 For definitions of other technical terms pertaining toplastics used in this specification, see Terminology D 883 orGuide D 5033.3.2 Definitions of Terms Specific to This Standard:3.2.1 centerline porosity, nmicrovoids which are visiblyde
11、tectable with the unaided eye using the dye penetrationprocedure detailed in 7.4.1.3.2.2 low porosity, nproduct which either exhibits nowhite centerline or a white centerline but no dye remains whentested in accordance with section 7.4.1.3.2.3 plate, nflat stock greater than14 in.1This specification
12、 is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.20 on Plastic Products(Section D20.20.02).Current edition approved July 15, 2005. Published August 2005. Originallyapproved in 1997. Last previous edition approved in 2003 as D 6100 - 03.
13、2As defined in Guide D 5033.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from American National
14、 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 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE S-POM Requirements for Acetal (Polyoxym
15、ethylene) ShapesType Description Class Description GradeClassification SystemD 6778 ResinCalloutADescriptionUltimateTensileStrengthmin, psiMPaTensileElongation% at break,mmTensileModulusmin,psiDimensionalStability%,max01 Homopolymer 1 Unfilled 1 POM0111BGeneral Purpose 9000 62 25 350 000 0.42 POM011
16、0B56540BGeneral Purpose 9000 62 15 350 000 0.40 As Specified Recycle Grade 8000 55 25 275 000 0.4As Specified . . . . . . . . . . . . . . .2 Lubricated 1 POM0110L20A21730BGeneral purpose 6100 42 10 345 000 0.43 Lubricated 2 POM0110L13BGeneral Purpose 6800 47 10 340 000 0.4(PTFE filled)4 Lubricated 3
17、 POM0110L20A992 General Purpose 5500 38 10 325 000 0.4(PTFE filled) 30(46)(2400)B5 Lubricated 4 POM0110L12BGeneral Purpose 5800 40 5 375 000 0.4Bearing grade02 Copolymer 1 Unfilled 1 POM0211BGeneral Purpose 8000 55 25 350 000 0.42 Recycle Grade 7000 48 25 275 000 0.40 As Specified . . . . . . . . .
18、. . . . . .00 Other Acetals 0 As Specified 1 As Specified General Purpose . . . . . . . . . . . .2 Recycle Grade . . . . . . . . . . . .AApplicable Classification System D 6778 resin type to be specified on purchase order.BIn accordance with Classification System D 6778.3.2.4 Porosity Level 1, nprod
19、ucts containing microvoidswith a pore size greater than 50 m 0.002 in. in which dyeremains either in a broken or continuous line which does notexceed 4 % centerline porosity when tested in accordance with7.4.1.3.2.5 recycled plastic shape, na product made from up to100 % recycled plastic.3.2.6 rod,
20、nsolid cylindrical shape with a minimum di-ameter of18 in.3.2.7 sheet, nflat stock less than and including14 in. mmthickness.3.2.8 tubular bar, nannular shapes with minimum insidediameter of38 in. and minimum wall thickness of116 in.3.2.9 virgin plastic shape, nproduct that is produced from100 % pla
21、stic resin that has not been subjected to subsequentmelt processing.4. Classification and Material4.1 Product shape and size as defined in the applicablepurchase order.4.2 This specification covers product as listed in TableS-POM. Products included in the designations reference Clas-sification Syste
22、m D 6778 callouts where applicable.4.2.1 The type of acetal extruded, compression molded orinjection molded product may be categorized by type, gradeand class depending on resin and filler compositions as definedin Table S-POM.4.3 Every type of acetal shape may be categorized into oneof several grad
23、es as follows:4.3.1 Grade 1General Purpose:4.3.1.1 Extruded, compression molded and injectionmolded product made using only 100 % virgin acetal resin.4.3.1.2 Up to 20 % acetal regrind plastic developed duringthe internal processing steps, may be reused for sheet product.TABLE A-1 Dimensional Require
24、ments for Acetal Rod (Grade 1)Size, in.Diameter Tolerance,in.RoundnessTIR, in.Camber, in./ft18 to 1 +0.007/0 0.002 212 /81to212 +0.005/0 0.005 114 /8212 to 8 +0.250/0 0.0501896 +1/+04.3.2 Grade 2Recycle Grade:4.3.2.1 Extruded, compression molded or injection moldedproduct made using any amount up to
25、 100 % of recycled acetalplastic.4.4 The type class and grade is further differentiated basedon dimensional stability (elevated temperature excursion test),Table S-POM and dimensional requirements, Tables A and B.4.4.1 When the level of centerline porosity needs to bedocumented it will be designated
26、 as either low porosity (LP) orP1 (Porosity Level 1) that is determined using the proceduredetailed in 7.4 and will be added to the callout as a suffix (seeExample 2 in 4.6.1.2).4.5 Property Tables:4.5.1 Table S-POM may be used to describe extruded,compression molded and injection molded products.4.
27、5.2 Table 1 may also be used to describe extruded,compression molded and injection molded products not in-cluded in Table S-POM via a cell callout which includes theapplicable Table S-POM acetal type and specific properties(Designations 1 through 7).4.5.3 To facilitate the incorporation of future or
28、 specialmaterials not covered by Table S-POM , the “as specified”category (OO) for type, class and grade is shown on the tablewith the basic properties to be obtained from Table 1, as theyapply.4.5.4 Reinforcements and Additive MaterialsA symbol(single-letter) will be used for the major reinforcemen
29、t orcombination, or both, along with two numbers that indicate thepercentage of addition by mass with the tolerances as tabulatedD6100052below. This must be included in all Table 1 callouts (seeExample 3 in 4.6.1.3).ToleranceSymbol Material (Based on the Total Mass)C Carbon and graphite fiber 62%G G
30、lass 62%L Lubricants (for example, by agreement between thePTFE, graphite, silicone supplier and the userand molybdenum disulfide)M Mineral 62%R Combinations of reinforcements 63 % for the total reinforcementor fillers, or both4.6 Callout DesignationA one-line system shall be usedto specify acetal m
31、aterials covered by this specification. Thesystem uses pre-defined cells to refer to specific aspects of thisspecification as illustrated below:4.6.1 Description:4.6.1.1 Example 1Product made from general purposeacetal homopolymer:CELL CALLOUT: S-POM0111S-POM01 = Product made from POM homopolymer in
32、 accordance withTable S-POM1 = Unfilled class1 = General purpose grade product4.6.1.2 Example 2Product made from general purposeacetal copolymer, low porosity:CELL CALLOUT: S-POM0211,LPS-POM02 = Product made from POM copolymer in accordance withTable S-POM1 = Unfilled class1 = General purpose grade
33、productLP = Low porosity material4.6.1.3 Example 3Product made from 20 % PTFE rein-forced general purpose acetal homopolymer resin:CELL CALLOUT: S-POM0121S-POM01 = Product made from POM homopolymer in accordance withTable S-POM2 = Lubricated1 = PTFE filled4.6.2 The three examples illustrate how a on
34、e-line, alpha-numeric sequence can identify the product composition, com-mercial parameters and physical characteristics of extruded,compression molded and injection molded product. A spacemust be used as a separator between the specification numberand the type designation. No separators are needed
35、betweentype, class and grade. When special notes are to be included,such information should be preceded by a comma. Specialtolerances must be noted at time of order and are inserted afterthe grade in parenthesis and preceded by a comma.TABLE B-1 Dimensional Requirements for Acetal Sheets andPlates (
36、Grades 1 and 2)ANOTE 1SquarenessAll sizes18 in. max, gap when measured inaccordance with 11.4.Size, in. Thickness TolerancesLength Camber,in./ftWidth Bow, in./ft116 to316 610 %34 /4316 /214 to 1 +0.025/034 /4316 /2118 to 3 +0.050/014 /4116 /2318 and over +0.125/014 /418 /2ACompression molded plate i
37、s supplied sufficiently oversize to finish to nominaldimension listed.TABLE B-2 Dimensional Requirements for Acetal CompressionMolded Plates (Grade 1)Size in. Thickness TolerancesLength Camber,in./ftWidth Bow, in./ft14 +0.090/038 /4 0.090/2516 +0.090/038 /4 0.090/238 +0.090/038 /4 0.090/2716 +0.090/
38、038 /4 0.090/212 +0.090/038 /4 0.090/258 +0.090/038 /4 0.090/234 +0.090/038 /4 0.090/278 +0.090/038 /4 0.090/21 +0.090/018 /4 0.050/2118 +0.090/018 /4 0.050/2114 +0.090/018 /4 0.050/2138 +0.090/018 /4 0.050/2112 +0.090/018 /4 0.050/2158 +0.090/018 /4 0.050/2134 +0.090/018 /4 0.050/2178 +0.090/018 /4
39、 0.050/22 +0.090/018 /4 0.050/25. Physical Property Requirements5.1 The physical property values listed within this specifi-cations tables are to be considered minimum specificationvalues. Any requirement for specific test data for a givenproduction lot should be specified at the time of order. Phys
40、icalproperties for products not yet included in Table S-POM maybe specified using Table 1 for extruded, compression moldedand injection molded products.6. Dimensional Requirements6.1 The type, class and grade is further differentiated basedon dimensional stability (elevated temperature excursion tes
41、t),Table S-POM, and dimensional requirements, Tables A and B.Products shall be produced within commercial tolerances andwith the lowest stress levels for machined parts as delineated inTables A and B for extruded, compression molded or injectionmolded products. The manner in which the tolerances are
42、obtained is not relevant.6.2 Tubular bar dimensions shall be supplied in the unfin-ished condition, unless otherwise specified at time of order,sufficient to finish to the nominal dimension ordered.D61000536.3 The maximum allowable camber or bow, or both, shallbe within the limits referenced in Tabl
43、es A-1 and B-1.7. Workmanship, Finish, and Appearance7.1 AppearanceThe color of products shall be as pub-lished by the shapes manufacturer. They shall be uniform incolor throughout the thickness. Specific colors and colormatching only as agreed to by order. Physical properties maybe affected by colo
44、rs.7.2 FinishAll products shall be free of blisters, wrinkles,cracks, gouges and defects that restrict commercial use of theproduct. Special surface finish shall be supplied only whenspecified in the purchase order or contract.7.3 DefectsAll products shall be free of dirt, foreignmaterial and embedd
45、ed particles exceeding132 in. maximumdiameter as defined in 7.3.1.7.3.1 The criteria for determining the internal cleanlinessshall be external visual inspection. A maximum number of twointernal defects per square foot of plate/sheet and one footlength of rod and tubular bar. Clusters of defects less
46、 than132in. diameter are to be counted as a single defect.7.4 Centerline PorosityMaximum allowable porositylevel for products designated as porosity Level 1 shall notexceed 4 % as described in 7.4.1. Products identified lowporosity (LP) shall not have any centerline porosity.7.4.1 A rod (see Fig. 1)
47、 or plate (see Fig. 2) or tubular barwall, full cross-section sample shall have a milled surface ofapproximately 72 RMS prior to testing. Color over thiscenterline or dot with red permanent magic marker and allowone minute for the markings to dry. For colored product a moresensitive ultraviolet fluo
48、rescent yellow permanent magicmarker is required. Clean off the colored area with acetone.The ink or dye will not be washed from inside the porosity andwill show up as colored particles. Measure the widest part orlargest diameter of the porosity line. Colored product must beexamined using a UV light
49、 sensor (long wavelength). Thisvalue is then divided by the diameter of the rod, thickness ofthe plate, or tubular bar wall thickness, and multiplied by 100to obtain the percent centerline porosity value.NOTE 1A6 in. length of acetal rod is cut in half, approximately116 in.off center to reveal center core of rod sample.FIG. 1 Acetal RodNOTE 1A full-width sample of plate is cut to approximatelya3in.length then face-milled116 in. to properly display cent
