ASTM_D_3611_-_06_2011.pdf

Designation:D361106(Reapproved 2011)Standard Practice forAccelerated Aging of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D3611;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year 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.Scope1.1This practice provides one environment in which toexpose finished pressure-sensitive tape material for the purposeof accelerating the aging of it.It is applicable to tape in rollform when the user observes the precautions detailed withinthe procedure.The practice does not provide for a conclusionwithin itself,but is for use in conjunction with appearance orphysical property tests to follow the accelerated exposure.While this practice was developed using packaging type tapes,its use on other types of tape with similar construction isencouraged.It is not intended for use on electrical grade tapes(see Test Methods D1000).1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility 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:2D996 Terminology of Packaging and Distribution Environ-mentsD1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applica-tionsD3330/D3330M Test Method for PeelAdhesion of Pressure-Sensitive TapeD3715/D3715M Practice for Quality Assurance of Pressure-Sensitive TapesD4332 Practice for Conditioning Containers,Packages,orPackaging Components for Testing3.Terminology3.1 Terminology found in Terminology D996 shall apply.4.Summary of Practice4.1 The pressure-sensitive tape is exposed to an atmosphereof 80%relative humidity at 150F(66C)for a period of 96 h.Following a period for returning to a standard atmosphere,thetape is ready for a prescribed examination using a method suchas Test Methods D3330/D3330M.5.Significance and Use5.1 This practice accelerates the natural aging of pressure-sensitive tapes so that the response to the usual physicalproperty tests changes to the same extent as with an exposureto approximately two years of natural aging when comparedwith the response to tests before aging.5.1.1 Natural aging in this context means a continuousperiod of aging of tape in a closed fibreboard container(indarkness)in the variable climate of either the warm moistsouth,the warm dry southwest or the moderate midcontinent,USA.5.2 The extent of change for one physical property shouldbe expected to be different than for another property and sowould also relate to different natural aging time.5.3 An abnormal product lot may cause differences intesting response that throw off the expected time patterns.5.4 Appearance of normal tape product will usually changeonly slightly on two years natural aging.This acceleratedexposure usually produces an exaggerated change in appear-ance which would be seen under natural conditions only inabnormal product.5.5 There is no present experience to relate this acceleratedexposure to responses of tape in applications where the tape isunder a use stress.6.Apparatus6.1 Humidity Vessel in Oven Procedure:6.1.1 Vessel,to contain a solution of ammonium sulphateand tape undergoing exposure.The vessel must meet thefollowing requirements:6.1.1.1 Vented to allow equilibrium with an opening not toexceed 0.01 mm.21This practice is under the jurisdiction of ASTM Committee D10 on Packagingand is the direct responsibility of Subcommittee D10.14 on Tape and Labels.Current edition approved Sept.1,2011.Published November 2011.Originallyapproved in 1977.Last previous edition approved in 2006 as D3611 06.DOI:10.1520/D3611-06R11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.1.1.2 The air volume over the solution to be not more than10%greater than the cube of the square root of the liquidsurface area.6.1.1.3 The air depth of the vessel to the liquid surface to benot more than 10%greater than the square root of the liquidsurface area.6.1.1.4 Adesiccator assembly with a perforated plate can bea suitable vessel.6.1.2 Oven,of the forced-convection type maintained at amean of 66 6 2C(150 6 4F).6.2 Humidity chamber,to contain rolls of tape maintained ata mean of 66 6 2C(150 6 4F)and 80 6 5%relativehumidity.7.Reagents(for Humidity Vessel in Oven procedure)7.1 Purity of ReagentsReagent grade chemicals shall beuse