1、This internationa l standard was developed in accordance 1th internationally recognized principles on standard ization established in the Decision on Principles for the Development of International Stanclarcls,Guides and Recommendations issued by the World Tracie Organization Technical Barrier s to
2、Tracie(TBT)Committee.a Designation:08349-21 u 1 _t _ INTERNA TIONAi.Standard Classification System for and Basis of Specifications for Thermoplastic Joining Interface Materials for Creation of Joints Between Different Materials for the Production of End Items or Parts that are Intended to be Disasse
3、mbled and/or Reassembled1 This standard is issued under the fixed designation D8349;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscrip
4、t epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This classification system covers thermoplastic materials,used as joining materials,for the creation of joints between similar or dissimilar materials,to produce finished products or parts that are intended t
5、o be disassembled and/or reassembled.1.2 This class of materials enables disconnection of the different parts or layers of a products for refurbishing,repair and full recovery and recycling of the joined materials,for instance at the end of life of the product(s),enabling the reuse of valuable resou
6、rces,and hence reducing adverse impact on the environment.1.3 The properties included in this classification system are those required to identify the materials covered.It is possible that there are other requirements necessary to identify particu-lar characteristics important to specialized applica
7、tions.One way of specifying them is 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 out plastic materials used in the fabrication of end items or parts.It is not intended for the selection
8、 of materials.Material selection is best made by those having expertise in the plastic field after careful consideration of the design and the perfor-mance required of the part,the environment to which it will be exposed,the fabrication process to be employed,the costs involved,and the inherent prop
9、erties of the material other than those covered by this classification system.1.5 The values stated in SI units are to be regarded as standard.No other units of measurement are included in this standard.This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct re
10、sponsibility of Subcommittee D20.15 on Thermoplas tic Materi-als.Current edition approved Oct.I,2021.Published November 2021.DOI:1 0.l 520/D8349-21 1.6 The following precautionary caveat pertains only to the test methods portion,Section 11,of this classification system.This standard does not pu,port
11、 to address all of the safety concerns,if any,associated with its use.ft is the responsibility of the user of this standard to establish appropriate safety,health,and environmental practices and determine the appli-cability of regulatory limitations prior to use.Norn I-Application examples are fully
12、 recyclable mattresses and floor coverings.These products can be disassembled into its different parts,by using heat,for refurbishing,repair and full recovery and recycling of the joined materials at the end of the products life.1.7 This international standard was developed in accor-dance with inter
13、nationally recognized principles on standard-ization established in the Decision on Principles for the Development of International Standards,Guides and Recom-mendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.2.Referenced Documents 2.1 ASTM Standards:2 D618
14、Practice for Conditioning Plastics for Testing D883 Terminology Relating to Plastics D 1600 Terminology for Abbreviated Terms Relating to Plas-tics D3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystalli zation of Polymer s by Differential Scanning Calorimetry D3892 Pra
15、ctice for Packaging/Packing of Plastic s D4000 Classification System for Specifying Plastic Materi-als D5279 Test Method for Plastics:Dynamic Mechan ical Prop-erties:In Torsion E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications 2 For referenced ASTM s
16、tandards,visit the ASTM website,www.astm.org,or contact ASTM Customer Service at serviceastm.org.For Annual Book ofASTM Standards volume information,refer to the standards Document Summary page on the ASTM website.Copyright AST M International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States 0 D8349-21 2.2 ISO Standards:3 ISO 2555 Plastics-Resins in the liquid state or as emul-sions or dispersions-Determination of apparent viscosity using a single cylinder type rot
