1、Designation:D346997(Reapproved 2007)Standard Test Methods forMeasurement of Vertical Downward Forces to DisengageType IIA Lug-Style Child-Resistant Closures1This standard is issued under the fixed designation D3469;the number immediately following the designation indicates the year oforiginal adopti
2、on 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.1.Scope1.1 These test methods2measure the downward forcesduring the disengagement of lug-sty
3、le caps from their respec-tive containers.1.2 These test methods measure the maximum torque de-veloped while the cap is further disengaged by turning of thecontainer.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the
4、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:3D3475 Classification of Child-Resistant PackagesD3481 Test Method for Manual Shelling Two-Piece Child-Resistan
5、t Closures That Are Activated by Two Simultane-ous Dissimilar MotionsE105 Practice for Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 Definitions:3.1.1 type IIA child-r
6、esistant closurea lug finish closurerequiring a random push down while turning.(See Classifica-tion D3475.)3.2 Definitions of Terms Specific to This Standard:3.2.1 vertical force to disengagementthe amount of down-ward force required to release the lugs from a locked position(disengagement)so rotati
7、onal movement can be achieved.4.Summary of Test Method4.1 The average downward force to disengage lugs of thecap from the several receptacles on the containers is obtained.The standard deviation may be determined for a given lot ofpackages.These measurements of force are recorded includingtorque gen
8、erated in removal of the cap.4.2 Test Methods A and B use a force-measuring device todetermine the downward force required to disengage the lugson the cap from the corresponding receptacles on the containerwith the downward travel being controlled through a specificdistance.Test Methods A and B use
9、different measuringdevices.The correlation of results between the two testmethods has not been evaluated.4.3 Test Method BThis procedure uses the apparatus asshown in Fig.1.The downward force is measured by a gagethat is lowered onto the cap of the specimen.The verticalmovement is controlled and the
10、 twisting of the cap is mini-mized while the vertical force is applied.The torque may bemeasured during this removal procedure when the test speci-men is clamped in a suitable torque meter.5.Significance and Use5.1 These test methods may be used in establishing andconfirming quality control standard
11、s.5.2 These test methods may be used to establish perfor-mance standards for Type IIA child-resistant packages.6.Apparatus6.1 Force-Measuring Scale(Test Method A),4with a sup-porting stand maintaining the appropriate force gage in avertical position similar to the design in Fig.1 and incorporat-ing
12、an indicator for travel.A controlled vertical movement isdesirable.1These test methods are under the jurisdiction of ASTM Committee D10 onPackaging and are the direct responsibility of Subcommittee D10.32 on Consumer,Pharmaceutical,Medical,and Child Resistant Packaging.Current edition approved Oct.1
13、,2007.Published October 2007.Originallyapproved in 1976.Last previous edition approved in 2002 as D3469 97(2002).DOI:10.1520/D3469-97R07.2These test methods may provide a supplemental procedure to Test MethodD3471 that similarly require a random push-down while turning to open.Datagenerated may not
14、be comparable to Test Method D3471 procedure.3For 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.4One force-measuring
15、scale that has been found satisfactory is the AccuforceCadet(0-20#scale),Ametek/Mansfield&Green Vision,Largo,FL 34643.Otherforce scales may or may not be satisfactory.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Force-MeasurementMa
16、chine(TestMethodB),5electronic compression tester.7.Sampling7.1 The sample size will depend upon the particular objec-tive of the test.For a given set of samples,sufficient measure-ments should be taken in accordance with established statisticalsampling procedures.NOTE1Refer to Practices E105 and E122 for more specific informa-tion.8.Calibration8.1 Calibrate the vertical force measuring devices based onrecommendations of the manufacturer.9.Conditioning9.1 Store the unassembled sample specimens f
