ASTM D2561-2012 Standard Test Method for Environmental Stress-Crack Resistance of Blow-Molded Polyethylene Containers《吹模制聚乙烯容器抗环境应力裂纹的标准试验方法》.pdf
《ASTM D2561-2012 Standard Test Method for Environmental Stress-Crack Resistance of Blow-Molded Polyethylene Containers《吹模制聚乙烯容器抗环境应力裂纹的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2561-2012 Standard Test Method for Environmental Stress-Crack Resistance of Blow-Molded Polyethylene Containers《吹模制聚乙烯容器抗环境应力裂纹的标准试验方法》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D2561 95 (Reapproved 2005) D2561 12Standard Test Method forEnvironmental Stress-Crack Resistance of Blow-MoldedPolyethylene Containers1This standard is issued under the fixed designation D2561; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n 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.1. Scope Scope*1.1 Under certain conditions of stress, and in the presence of environments suc
3、h as soaps, wetting agents, oils, or detergents,blow-molded polyethylene containers may exhibit mechanical failure by cracking at stresses appreciably below those that wouldcause cracking in the absence of these environments.1.2 This test method measures the environmental stress crack resistance of
4、containers, which is the summation of the influenceof container design, resin, blow-molding conditions, post treatment, or other factors that can affect this property. Three proceduresare provided as follows:1.2.1 Procedure A, Stress-Crack Resistance of Containers to Commercial LiquidsThis procedure
5、 is particularly useful fordetermining the effect of container design on stress-crack resistance or the stress-crack resistance of a proposed commercialpackage containing a proprietary liquid product.1.2.2 Procedure B, Stress-Crack Resistance of a Specific Container to Polyoxyethylated Nonylphenol,
6、Nonylphenol (CAS68412-54-4), a Stress-Cracking AgentThe conditions of test described in this procedure are designed for testing containers madefrom Class 3 polyethylene Specification D4976. Therefore, this procedure is recommended for containers made from Class 3polyethylene only. This procedure is
7、particularly useful for determining the effect of resin on the stress-crack resistance of thecontainer.1.2.3 Procedure C, Controlled Elevated Pressure Stress-Crack Resistance of a Specific Container to PolyoxyethylatedNonylphenol, Nonylphenol (CAS 68412-54-4), a Stress-Cracking AgentThe internal pre
8、ssure is controlled at a constant elevatedlevel.NOTE 1There are environmental concerns regarding the disposal of Polyoxyethylated Nonylphenol (Nonylphenoxy poly(ethyleneoxy) ethanol (CAS68412-54-4), for example, Igepal CO-630). Users are advised to consult their supplier or local environmental offic
9、e and follow the guidelines providedfor the proper disposal of this chemical.1.3 These procedures are not designed to test the propensity for environmental stress cracking in the neck of containers, suchas when the neck is subjected to a controlled strain by inserting a plug.1.4 The values stated in
10、 SI units are to be regarded as standard.NOTE 2There is no known ISO equivalent to this standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health
11、practices and determine the applicability of regulatorylimitations prior to use. Specific precautionary statements are given in Section 8 and Note 12 and Note 89.2. Referenced Documents2.1 ASTM Standards:2D374 Test Methods for Thickness of Solid Electrical InsulationD618 Practice for Conditioning Pl
12、astics for TestingD4976 Specification for Polyethylene Plastics Molding and Extrusion MaterialsD5947 Test Methods for Physical Dimensions of Solid Plastics Specimens1 This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.19
13、on Film, Sheeting, and MoldedProducts.Current edition approved July 15, 2005Aug. 1, 2012. Published August 2005September 2012. Originally approved in 1966. Last previous edition approved in 20012005as D2561 - 95 (2001).(2005). DOI: 10.1520/D2561-95R05.10.1520/D2561-12.2 For referenced ASTM standards
14、, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM
15、 standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published b
16、y ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1E145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.
17、 Terminology3.1 Definitions of Terms Specific to This Standard:3.2 failureduring this test method, the formation of any imperfection, such as a crack, which results in a loss of pressurizinggas or stress-cracking agent. A container has failed when:3.2.1 It has lost pressure through any aperture othe
18、r than heat seal areas; or, in Procedure C, when there is a detectable flowof supply air into the bottle,3.2.1 DiscussionA container has failed when:It has lost pressure through any aperture other than heat seal areas; or, in Procedure C, when there is a detectable flow ofsupply air into the bottle,
19、 there is any visible crack completely through the container wall, there is evidence of the containedliquid on the outside of the container through any aperture other than one at the heat-seal area, or the contained liquid volumehas been reduced.3.2.2 There is visible to an observer with normal eyes
20、ight any crack completely through the container wall, or3.2.3 There is evidence of the contained liquid on the outside of the container through any aperture other than one at theheat-seal area, or the contained liquid volume has been reduced.4. Summary of Test Method4.1 Procedure A consists of expos
21、ing any filled, sealed, blow-molded container to the action of a potential stress-cracking agentwithin the container, at an elevated temperature. The time to failure is observed.4.2 Procedure B consists of exposing a partly filled and sealed blow-molded standard container to container, partly filled
22、 to onethird of overflow capacity, to the action of polyoxyethylated nonylphenol, a stress-cracking agent, within the container, as well asto the action of this agent as an external environment, at an elevated temperature. The time to failure is observed.4.3 Procedure C consists of exposing a partly
23、 filled blow-molded standard container to blow-molded standard container, partlyfilled to one fourth of overflow capacity, to the action of polyoxyethylated nonylphenol, a stress-cracking agent, within thecontainer, as well as to a constant elevated pressure internally applied and at an elevated tem
24、perature. The time-to-failure can bedetermined in a tactual-visual manner, or instrumentally.NOTE 3Partial filling, that is, one third of nominal capacity, has been found to increase the severity of the test with many test liquids. Thus, the partialfill can be used to accelerate the test. The use of
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