1、Designation: D 4801 08Standard 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 ye
2、ar of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 requ
3、irements 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 a
4、s chemical 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
5、the 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 parentheses are for informationonly.1.4 The following precautionary caveat pert
6、ains 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 app
7、licability 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 Gr
8、avity (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 Specificatio
9、n for 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 Plastics3D 5947 Test Methods for Physical Dimens
10、ions of SolidPlastics SpecimensD 7209 Guide for Waste Reduction, Resource Recovery,and Use of Recycled Polymeric Materials and Products2.2 Military Standard:4MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes2.3 Federal Standard:4Fed. Std. No. 406A Plastics: Methods of Testing(
11、Method 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 IG
12、eneral purpose, natural and colors.4.1.2 Type IIDielectric, natural and colors.4.1.3 Type IIIWeather-resistant, black.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.19 on Film andSheeting.Current edition approved No
13、v. 1, 2008. Published November 2008. Originallyapproved in 1988. Last previous edition approved in 2007 as D 4801 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 information, refer to
14、 the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1*A Summary of Cha
15、nges 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. Ordering Information5.1 As appropriate, the following information shall beincluded in the purchase contract.5.1.1 Title, number, and d
16、ate of this specification.5.1.2 Classification in accordance with the appropriate cellcall-out as found 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
17、).6. Materials and Manufacture6.1 MaterialsThe sheeting shall be manufactured frompolyethylene thermoplastic 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 extrusio
18、nand roll polishing, or compression.7. Detail Requirements7.1 FormThe sheeting shall be furnished flat 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 Specifica
19、tion D 4976.7.3 ShrinkageThe sheeting, when tested as specified in11.3, shall conform to the requirements 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 suppl
20、ier.7.5 DimensionsSheeting shall be supplied in the width,length (or weight), and thickness as specified 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 packedse
21、parately from full-sized sheet. The thickness shall be testedin accordance with 11.5. Thickness tolerances 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 permitted
22、to have the lesser length or weight required to make the totallength or weight of the shipment equal to the 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 Workmans
23、hipThe sheeting shall have a smooth finishand shall be free of cracks, blisters, bubbles, discolorations,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 descr
24、ibed in Table 2.7.9.2 Defects in Color, Appearance, and WorkmanshipThe sheeting shall show none of the defects 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
25、 acceptable alterna-tive. A lot of material shall be considered as a unit ofmanufacture as prepared for shipment, 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 Ta
26、ble 1 and Table 2 in accordance withthe test methods specified herein, for each lot submitted forinspection.10. Conditioning10.1 Condition the test specimens at 23 6 2C (73.4 63.6F) for not less than 40 h prior to test in accordance withSpecification D 4976 or as otherwise specified by agreement.In
27、cases of disagreement, the tolerances shall be 61C(61.8F).10.2 In addition, for films containing hydrophilic fillers,co-monomers, pigments or other modifiers, conditioning andtesting shall be done at 50 6 10 % relative humidity. In casesof disagreement, the tolerance shall be 65 % relative humidity.
28、11. Test Methods11.1 Conduct the tests at 23 6 2C (73.4 6 3.6F) inaccordance with Specification D 4976 or as otherwise specifiedby agreement. In cases of disagreement, the tolerances shall be6 1C (61.8F)11.2 Tensile Stress at Yield and Nominal Strain at BreakTest in accordance with Test Method D 638
29、. Determine tensilestress at yield and nominal strain at break.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 Defects
30、Length and width (sheet) 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 we
31、ight specifiedvaries by more than +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.
32、) diameterhole unless otherwise specifiedD480108211.2.1 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 tra
33、nsverse directions if agreed upon between the supplierand 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
34、 3.6F) for Group 2, Classes 3 and 4Polyethylene (Specification 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 tw
35、ist usingtwo sheets tested in accordance with Method 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
36、end of thestraightedge to extend beyond the edge of the 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
37、and nopressure shall be exerted on it that might tend 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 (i
38、n.)11.4.2 PrecisionNo data are available for a precisionstatement.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 t
39、heArbitration Method given in the test method section of Speci-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 measure
40、ment is influencedby the characteristics of the material and 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, appr
41、oxi-mately 5 by 5 cm (2 by 2 in.) in area, taken randomly across 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
42、 or less and tenspecimens are recommended for sheeting greater 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, whichwi
43、ll result in erroneous readings. If it is necessary to use a 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,
44、and the specimens shall be clean and dry.Take one measurement 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 suppli
45、er and the user, or as a part ofthe purchase contract.12.2 Periodic 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 or
46、der or contract.13. Packaging, Packing, and Marking13.1 Provisions 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; thic
47、kness 25 mil; weather-resistant sheetTABLE 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 n
48、ot smooth and straightany delaminations or porosity on edgesD4801083S1. QUALITY ASSURANCE 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, sampli
49、ng for inspection andtesting shall be in accordance with the recommendations of Practice 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 prepar
