1、Designation: D 4801 07Standard Specification forPolyethylene Sheeting in Thickness of 0.25 mm 0.010 in.and Greater1This standard is issued under the fixed designation D 4801; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers requi
3、rements for extruded(cast or blown) and compression-molded sheeting made fromlow-, medium- and high-density polyethylenes and copolymersin thickness of 0.25 mm 0.010 in. and greater. Depending onthe functional requirements, sheeting conforming to this speci-fication is used in applications such as c
4、hemical tank linings,spacers in electrical equipment, thermoforming into such itemsas trays, pallets, and shipping containers, and as machine-shopstock.1.2 Polyethylene materials, being thermoplastics, are repro-cessable and recyclable (see Guides D 5033 and D 7209). Thisspecification allows for the
5、 use of those polyethylene plasticmaterials, provided that any specific requirements as governedby the producer and end user are met.1.3 The values stated in SI units are to be regarded asstandard. The values given in brackets are for information only.1.4 The following precautionary caveat pertains
6、only to thetest methods portion, Section 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 applicab
7、ility of regulatory limita-tions prior to use.NOTE 1There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D 618 Practice for Conditioning Plastics for TestingD 638 Test Method for Tensile Properties of PlasticsD 792 Test Methods for Density and Specific Gravity
8、 (Rela-tive Density) of Plastics by DisplacementD 883 Terminology Relating to PlasticsD 1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD 1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD 2103 Specification for
9、 Polyethylene Film and SheetingD 3892 Practice for Packaging/Packing of PlasticsD 4976 Specification for Polyethylene Plastics Molding andExtrusion MaterialsD 5033 Guide for Development of ASTM Standards Relat-ing to Recycling and Use of Recycled PlasticsD 5947 Test Methods for Physical Dimensions o
10、f SolidPlastics SpecimensD 7209 Guide for Waste Reduction, Resource Recovery,and Use of Recycled Polymeric Materials and Products2.2 Military Standard:3MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes2.3 Federal Standard:3Fed. Std. No. 406A Plastics: Methods of Testing(Method
11、 6051, Warpage)3. Terminology3.1 Definitions: Unless otherwise indicated, the terminologyused in this specification is in accordance with TerminologyD 883.4. Classification4.1 The polyethylene sheeting in accordance with thisspecification is classified by special types as follows:4.1.1 Type IGeneral
12、 purpose, natural and colors.4.1.2 Type IIDielectric, natural and colors.4.1.3 Type IIIWeather-resistant, black.5. Ordering Information5.1 As appropriate, the following information shall beincluded in the purchase contract.1This specification is under the jurisdiction of ASTM Committee D20 onPlastic
13、s and is the direct responsibility of Subcommittee D20.19 on Film andSheeting.Current edition approved April 1, 2007. Published April 2007. Originallyapproved in 1988. Last previous edition approved in 2006 as D 4801 06.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
14、ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1*A Summar
15、y 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.5.1.1 Title, number, and date of this specification.5.1.2 Classification in accordance with the appropriate cellcall-out as found
16、 in Specification D 4976.5.1.3 Length and width of sheets (see 7.5 and 7.6).5.1.4 Thickness of sheets (see 7.5).5.1.5 Color (see 7.7).5.1.6 Requirements for packaging, packing, and marking(see 13.1).6. Materials and Manufacture6.1 MaterialsThe sheeting shall be manufactured frompolyethylene thermopl
17、astic material of the special grade speci-fied in 5.1.2. The supplier shall furnish, for the material used,data for the classification properties.6.2 ManufactureSheeting shall be formed by extrusionand roll polishing, or compression.7. Detail Requirements7.1 FormThe sheeting shall be furnished flat
18、or in rolls inthe dimensions specified.7.2 Tensile Stress at Yield and Nominal Strain at BreakSheeting shall conform to the values shown for the appropriatecell classification as found in Specification D 4976.7.3 ShrinkageThe sheeting, when tested as specified in11.3, shall conform to the requiremen
19、ts as determined betweenthe user and the supplier.7.4 Warpage and TwistThe sheeting, when tested asspecified in 11.4, shall conform to the requirements as deter-mined between the user and the supplier.7.5 DimensionsSheeting shall be supplied in the width,length (or weight), and thickness as specifie
20、d between the userand the supplier, except that is permissible for a maximum of4 % of the sheet in a shipment to be trimmed 55-mm 2-in.undersize or half-size. Such trimmed sheet shall be packedseparately from full-sized sheet. The thickness shall be testedin accordance with 11.5. Thickness tolerance
21、s are shown inTable 1.7.6 Length or Weight and Diameter of RollsSheeting inrolls shall be supplied with either the length or weightspecified, except that one roll in a shipment shall be permittedto have the lesser length or weight required to make the totallength or weight of the shipment equal to t
22、he quantity ordered.Specify the diameter of the roll.7.7 ColorThe sheeting shall be of the color specified bythe user.7.8 GradeThe sheeting shall be of the grade specified bythe user.7.9 WorkmanshipThe sheeting shall have a smooth finishand shall be free of cracks, blisters, bubbles, discolorations,
23、craze, surface scratches that form definite indentations, andother defects that could affect appearance or serviceability.7.9.1 Dimensional DefectsThe sheeting shall show noneof the defects described in Table 2.7.9.2 Defects in Color, Appearance, and WorkmanshipThe sheeting shall show none of the de
24、fects described in Table3.8. Sampling8.1 The materials shall be sampled in accordance with thesampling procedure prescribed in Practice D 1898. Adequatestatistical sampling shall be considered an acceptable alterna-tive. A lot of material shall be considered as a unit ofmanufacture as prepared for s
25、hipment, and shall be permittedto consist of a blend of two or more production runs or batches.9. Testing9.1 Test the sheeting for the applicable characteristics listedin 7.2, 7.3, and 7.4 and Table 1 and Table 2 in accordance withthe test methods specified herein, for each lot submitted forinspecti
26、on.10. Conditioning10.1 For natural unfilled polyethylene plastics the controlledlaboratory atmosphere shall be 23 6 2C. Condition the testspecimens not less than 40 h prior to testing in accordance withProcedure A of Practice D 618. For filled and reinforcedpolyethylene plastics or polyethylene pla
27、stic blends, whichcontain a hydrophilic co-monomer, pigment, or modifier thespecimens shall be conditioned in a standard laboratory atmo-sphere of 23 6 2C and 50 6 5 % relative humidity. For allmaterials to be conditioned for electrical testing, conditioningshall comply with the requirements of the
28、standard testmethods for electrical testing.TABLE 1 Thickness TolerancesNominal Thickness, mm in.Thickness Tolerance,Percent of Nominal0.254 to 1.78 0.010 to 0.070, incl 610Greater than 1.78 0.070 65TABLE 2 Examination of the Sheeting for Defects in DimensionsExamine DefectsLength and width (sheet)
29、not of the length and width specifiedvaries by more than +3.2, 0 mm+18 ,0in.varies by more than 613 mm 612 in.from true rectanglesWidth (sheeting) not of the width specifiedvaries by more than +13, 0 mm+12 ,0in.Length or weight of rolls(sheeting)not of the length or weight specifiedvaries by more th
30、an +3, 1 %Diameter of rolls (sheeting) not of the diameter specifiedCores (sheeting) not having lengths equal to the nominalwidth of the sheeting, +13, 0 mm+12 ,0in.not having inside diameters as specifiedvaries by more than +3.2, 0 mm+18 , 0 in. for a 76-mm 3-in. diameterhole unless otherwise speci
31、fiedTABLE 3 Examination of Sheeting for Defects in Color,Appearance, and WorkmanshipExamine DefectsAppearance not uniform texture, finish, or colorany pits, blisters, cracks, dents, waviness, heat marks,or scratchesWorkmanship surface not polished and straightedges not smooth and straightany delamin
32、ations or porosity on edgesD480107211. Test Methods11.1 Conduct tests in the same environment used for con-ditioning in accordance with 10.1.11.2 Tensile Stress at Yield and Nominal Strain at BreakTest in accordance with Test Method D 638. Determine tensilestress at yield and nominal strain at break
33、.11.2.1 Test SpecimensPrepare test specimens by die cut-ting or machining. In extruded sheet, properties are dependenton the sampling direction; therefore, test specimens shall be cutand tested in the extrusion direction or in both the extrusionand transverse directions if agreed upon between the su
34、pplierand the user.11.3 ShrinkageTest in accordance with Test MethodD 1204, using a minimum oven time of 30 min, and an oventemperature of 130 6 2C 266 6 3.6F for Group 1 and 2,Classes 1 and 2 Polyethylene (Specification D 4976) and of140 6 2C 284 6 3.6F for Group 2, Classes 3 and 4Polyethylene (Spe
35、cification D 4976). If previous tests on thesame grade and nominal thickness of sheeting have shown thatthe use of talc or paper is unnecessary to provide freeshrinkage, these refinements can be omitted.11.4 Warpage and TwistDetermine warpage or twist usingtwo sheets tested in accordance with Method
36、 6051 of Fed. Std.No. 406A except for the following: a straightedge 1-m 36-in.long shall be used. Move the straightedge over the sheet androtate it along the sheet length about an axis perpendicular tothe plane of the sheet without permitting an end of thestraightedge to extend beyond the edge of th
37、e sheet. Measureand report the maximum distance from the sheet to thestraightedge. Make the measurement with the sheet lying withits surface of maximum convexity in contact with a horizontalflat surface. The straightedge shall be light in weight and nopressure shall be exerted on it that might tend
38、to reduce thewarpage or twist during the measurement.11.4.1 CalculationCalculate the warpage or twist as fol-lows:W 5D 3 100L(1)where:W = warpage or twist, %D = maximum deviation, mm in., andL = length of the sheet along the straightedge, mm in.11.4.2 PrecisionNo data are available for a precisionst
39、atement.11.5 ThicknessThe thickness of the sheeting covered inthis specification shall meet the tolerances given in Table 1when tested as follows: Determine the thickness by the methoddescribed in 11.5.1-11.5.4. In cases of disagreement use theArbitration Method given in the test method section of S
40、peci-fication D 2103.11.5.1 Because of the wide range of materials included inthe scope of this specification it is not possible to specify auniversal instrument geometry or method. The selection of aspecific method and instrument for measurement is influencedby the characteristics of the material a
41、nd needs to be consid-ered by the user of this specification.11.5.2 ApparatusAn instrument as described in TestMethod D 5947 that is suitable for the material and specimengeometry being tested.11.5.3 Test SpecimensPrepare test specimens, approxi-mately 5 by 5 cm 2 by 2 in. in area, taken randomly ac
42、ross thewidth of the roll. Take at least one set of test specimens fromeach roll being tested. In the case of sheet stock, a statisticallyvalid sampling plan shall be used. Five specimens are recom-mended for sheeting of widths of five feet or less and tenspecimens are recommended for sheeting great
43、er than five feetin width.NOTE 2Care must be taken in choosing the size of the specimen inrelation to the anvil to assure that the weight of the specimen overhangingthe anvil does not overcome the weight applied to the presser foot, whichwill result in erroneous readings. If it is necessary to use a
44、 largerspecimen, a heavier weight should be used.11.5.4 ProcedureA procedure, suitable for the materialand specimen geometry being tested, as described in TestMethod D 5947 shall be used. The surfaces of the anvil, thepresser foot spindle, and the specimens shall be clean and dry.Take one measuremen
45、t on each specimen. Average the mea-surements of all the specimens of a sample to obtain thethickness of the sample.12. Certification and Inspection12.1 Certification and lot acceptance of the material shall beagreed upon between the supplier and the user, or as a part ofthe purchase contract.12.2 P
46、eriodic check inspection shall consist of the testsagreed upon between the supplier and the user.12.3 A report of the test results shall be furnished at afrequency agreed upon between the supplier and the user whenspecified in a purchase order or contract.13. Packaging, Packing, and Marking13.1 Prov
47、isions of Practice D 3892 apply for packaging,packing, and marking of plastic materials.14. Keywords14.1 dielectric sheet; general purpose sheet; polyethylene;recycled plastics; sheeting; sheeting specification; thick gage;thick sheet; thickness 25 mil; weather-resistant sheetD4801073S1. QUALITY ASS
48、URANCE PROVISIONS FOR GOVERNMENT/MILITARY PROCUREMENTThese requirements apply only to Federal/Military procurement, not domestic sales ortransfers.S1.1 Unless otherwise specified in a purchase order or contact, sampling for inspection andtesting shall be in accordance with the recommendations of Pra
49、ctice D 1898.S1.2 Selection of Acceptable Quality Level (AQL) and ofInspection Level (IL) shall be made, with consideration of thespecific use requirements. This is discussed in Practice D 1898in the sections “Means and Standard Deviations,” and “Com-parison of Sampling Plans,” with reference to MIL-STD-105.S1.3 In the absence of contrary requirements, the followingvalues shall apply:IL AQLDefects in material and workmanship II 2.5Defects of preparation for delivery S-2 2.5Testing (products) S-1 1.5Te
