1、Designation:D464903(Reapproved 2009)Standard Guide forSelection and Use of Stretch Wrap Films1This standard is issued under the fixed designation D4649;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers recommended guidelines and testmethods for the selection,specification,and use of stretch wrapfilms for unitizing,reinforcing,
3、and palletizing for indoorenvironments.This can include storage or transport,or both,inwarehouses,closed containers such as truck trailers or railboxcars,and associated transfer terminals.This guide does notcover the performance issues associated with outdoor expo-sure.1.2 The values stated in inch-
4、pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresp
5、onsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D882 Test Method for Tensile Properties of Thin PlasticSheetingD907 Terminology of Adhesives
6、D996 Terminology of Packaging and Distribution Environ-mentsD1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD1746 Test Method for Transparency of Plastic SheetingD1894 Test Method for Static and Ki
7、netic Coefficients ofFriction of Plastic Film and SheetingD1898 Practice for Sampling of Plastics(Withdrawn 1998)3D1922 Test Method for Propagation Tear Resistance ofPlastic Film and Thin Sheeting by Pendulum MethodD2103 Specification for Polyethylene Film and SheetingD2457 Test Method for Specular
8、Gloss of Plastic Films andSolid PlasticsD2578 Test Method for Wetting Tension of Polyethylene andPolypropylene FilmsD2863 Test Method for Measuring the Minimum OxygenConcentration to Support Candle-Like Combustion ofPlastics(Oxygen Index)D3951 Practice for Commercial PackagingD4321 Test Method for P
9、ackage Yield of Plastic FilmD4470 Test Method for Static ElectrificationD5331 Test Method for Evaluation of Mechanical Handlingof Unitized Loads Secured with Stretch Wrap FilmsD5414 Test Method for Evaluation of Horizontal ImpactPerformance of Load Unitizing Stretch Wrap FilmsD5415 Test Method for E
10、valuating Load Containment Per-formance of Stretch Wrap Films by Vibration TestingD5416 Test Method for Evaluating Abrasion Resistance ofStretch Wrap Films by Vibration TestingD5458 Test Method for Peel Cling of Stretch Wrap FilmD5459 Test Method for Machine Direction Elastic Recoveryand Permanent D
11、eformation and Stress Retention ofStretch Wrap FilmE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE284 Terminology of Appearance3.Terminology3.1 DefinitionsTerminology found in Terminology D996shall apply.3.2 Definitions of Terms:3.2.1 blockingan undesirable adhesion between touchingl
12、ayers of a material,such as occurs under moderate pressureduring storage or use.(See Terminology D907.)3.2.2 claritythe characteristic of a transparent bodywhereby distinct high-contrast images or high-contrast objects(separated by some distance from the body)are observablethrough the body.(See Term
13、inology E284.)1This guide is under the jurisdiction ofASTM Committee D10 on Packaging andis the direct responsibility of Subcommittee D10.25 on Palletizing and Unitizing ofLoads.Current edition approved March 1,2009.Published March 2009.Originallyapproved in 1987.Last previous edition approved in 20
14、03 as D4649 03.DOI:10.1520/D4649-03R09.2For 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 the standards Document Summary page onthe ASTM website.3The last approved version
15、of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 clingthe ability of one surface of a material toadhere to itself or another surface.3.2.4 elastic recoverythe extent that a mat
16、erial returns toits original length after being subjected to an extension.3.2.5 elongationincrease in length(expressed as a percentof original length).3.2.6 thickness(caliper,gage)the perpendicular distancebetween opposite surface of a material.3.3 Definitions of Terms Specific to This Standard:3.3.1 conventional brakinga mode of stretch wrap ma-chinery operation in which wrap material elongation isachieved by relative load motion and supply roll tension.3.3.2 core extensionthe length to which t
