《JIS-Z-0235-2002-ENG.pdf》由会员分享，可在线阅读，更多相关《JIS-Z-0235-2002-ENG.pdf（33页珍藏版）》请在三一文库上搜索。
1、J IS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese tandards Association Cushioning materials for packaging-Determination of cushioning performance ICs 55.040; 83.100 Reference number : JIS 2 0235 : 2002 (E) PROTECTED BY COPYRIGHT 17 S Copyright Japanese Standards Association Prov
2、ided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 22:07:39 MDTNo reproduction or networking permitted without license from IHS -,-,- Z 0235 : 2002 Foreword This translation has been made based on the original Japanese Industrial Standar
3、d revised by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by the Japan Packaging Institute (JPI)/the Japanese Standards Association (JSA) with the dra
4、ft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently JIS Z 0235 : 1997 is replaced with this Standard. Date of Establishment: 1970-09-01 Date of Revision: 2002-03-20 Date
5、 of Public Notice in Official Gazette: 2002-03-20 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Logistics and Distribution of Goods JIS Z 0235 : 2002, First English edition published in 2003-08 Translated and published by: Japanese Standards Associat
6、ion 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any mean
7、s, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Res
8、ale, 03/13/2007 22:07:39 MDTNo reproduction or networking permitted without license from IHS -,-,- Z 0235 : 2002 Contents Introduction . 1 Scope 2 Normative references 3 Definitions 4 Classification of tests 5 Impact load test . 5.1 5.2 5.2.1 5.2.2 5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.2 5.4.3 5.4.4 5
9、.5 5.6 5.6.1 5.6.2 Principle of test Testing apparatus and measuring instrument Testing apparatus Measuring instrument Test pieces Sampling of test pieces . Dimensions of test piece . Direction of test . Testing method Conditioning of test piece . Measurement of test piece . Environmental condition
10、of test Implementation of test . Calculation Record and report of test . Record of test Report of test result 6 Compression creep test . 6.1 Principle of test Test apparatus and test piece . (i 6.2 PROTECTED BY COPYRIGHT Page 1 1 1 1 2 2 2 3 3 3 4 4 4 4 4 4 4 5 5 5 6 6 7 7 7 7 Copyright Japanese Sta
11、ndards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 22:07:39 MDTNo reproduction or networking permitted without license from IHS -,-,- Z 0235 : 2002 6.2.1 6.2.2 6.3 6.3.1 6.3.2 6.3.3 6.3.4 6.4 6.5 6.5.1 6.5.2 Test a
12、pparatus and measuring instrument Testing method Conditioning of test piece . Measurement of test piece . Test pieces . Environmental condition of test Implementation of test . Calculation Record and report of test . Record of test Report of test result Annex 1 (normative) Annex 2 (normative) Annex
13、3 (informative) Annex 4 (informative) Annex 5 (informative) Compression test method as simplified method . Impact load test method corresponding to International Standard . Record diagram of impact load test and compression creep test How to obtain static cushion factor 7 8 8 8 8 8 8 8 8 8 9 10 13 1
14、6 20 Comparison table between JIS and corresponding International Standard . 23 (ii) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 22:07:39 MDTNo reproduction or ne
15、tworking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JXS 2 0235 : 2002 Cushioning materials for packaging- Determination of cushioning performance Introduction This Japanese Industrial Standard has been made based on the cor- responding International Standard as to the rela
16、ting part (impact load test) of IS0 4651 Cellular rubbers and plastics-Determination of dynamic cushioning performance with some modifications of the technical contents. Portions underlined with dots or given sidelines in this Standard are the matters not specified in the original International Stan
17、dard. 1 Scope This Standard specifies the determination of cushioning performance and compression creep test method of the cushioning materials for packaging composed of the materials from which the non-proportional test pieces can be sampled or of the material of granular form. Remarks : The Intern
18、ational Standard corresponding to this Standard is as fol- lows. In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) ac- cording to ISO/IEC Guide 21. IS0 4651
19、: 1988 Cellular rubbers and plastics-Determination of dy- namic cushioning performance (MOD) 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amend
20、ments) indicated below shall be applied. JIS B 7733 Verification of the force measuring system of the compression testing machine JIS Z 0203 Packaged freights-Conditioning for testing JIS Z 8401 Guide to the rounding of numbers 3 Definitions For the purpose of this Standard the following definitions
21、 apply. cushioning material for packaging The material used mainly for mitigat- ing the impact and vibration given to the contents packaged (hereafter referred to as ?cushioning materials?). impact load The load generated in the test piece by the drop of hammer in the impact load test and its value
22、is obtained by multiplying the total mass of the hammer by the acceleration generated. static stress The total mass of the hammer and any additional masses multi- plied by the gravitational acceleration divided by the original area of the test piece. It is expressed in the load per unit area. PROTEC
23、TED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 22:07:39 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 Z 0235 : 2002 d) impact strain The rate
24、 of change of thickness in loading direction of the test piece generated by the impact load in the impact load test, expressed in per- centages by dividing by the thickness of the test piece before the test. equivalent drop height The free fall height which would result in the same impact velocity a
25、s the hammer striking on the test piece in the impact load test using a drop tester. impact permanent strain The value in percentages obtained by dividing the reduction in thickness of the test piece which passed a specified time after the impact load test by the thickness before the test. compressi
26、on creep strain The value in percentages obtained by dividing the rate of change in thickness of the test piece after the completion of the com- pression creep test by the thickness before the test. compressive stress The value expressed in the compression load per unit area obtained by dividing the
27、 compression load of the test piece after completion of the compression test at each change in the thickness by the area of the test piece before the test. compression strain The value in percentages obtained by dividing the rate of thickness change in compression direction of each test piece after
28、the completion of the compression test by the original thickness. cushion factor The value which indicates the performance of the cushion ma- terials to absorb impact energy and is classified into static cushion factor and dynamic cushion factor. The static cushion factor is the value of the compres
29、- sive stress obtained as a result of compression test and divided by the compres- sion energy per unit volume. The dynamic cushion factor is the value obtained as a result of the impact load test. 4 Classification of tests The tests are classified into the following two types and shall be carried o
30、ut according to the purposes. . -. a) Cushioning performance test Any one of the impact load test, the compression test as simplified method (Annex i), and the impact load test corresponding to International Standard (Annex 2). Remarks : Usual cushioning performance test is carried out by impact loa
31、d test. If this test is impossible to be carried out, the compression test as simplified method (Annex i) may be conducted by the agreement between the interested parties. Moreover, if requested in the trade with abroad, the impact load test corresponding to International Standard (Annex 2) may be a
32、dopted in accordance with the agree- ment between the interested parties. b) Compression creep test 5 Impact load test 5.1 Principle of test The test is to evaluate the cushioning performance of the cushioning materials in such a way that a hammer of variable mass strikes verti- cally the surface of
33、 the test piece at a specified velocity and the acceleration gener- ated in the hammer and rate of change in thickness of the test piece are measured. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, B
34、ernie Not for Resale, 03/13/2007 22:07:39 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 Z 0235 : 2002 5.2 Testing apparatus and measuring instrument 5.2.1 Testing apparatus The tester shall be of vertical-drop type. Each part of the tester shall conform to the following
35、 requirements: The hammer is of such rigidity that the vibration generated to the hammer it- self by the impact given to the test piece does not affect the measurement, of the variable mass and of the structure capable of fixing an accelerometer and displacement meter. The hammer drops vertically on
36、to the base plate and the velocity of the ham- mer at the time of impact is at least 95 % of the velocity at the time of free dropping from a specified height. The base plate is of the rigidity suitable for giving the impact energy of the hammer correctly to the test piece and has the mass at least
37、50 times the maxi- mum mass of the hammer used. The mass of the base plate includes the mass of the foundation of the rigidity considered to be integral with the base plate in the direction of impact load. The testing apparatus is capable of testing repetitively the optionally selected number of tim
38、es at intervals of 602 5 s. The function to prevent secondary impact which may arrive after the impact of the hammer given to the test piece is desirable. 5.2.2 Measuring instrument For the measuring instrument, accelerometer, dis- placement meter and speedometer having the following function and ch
39、aracteristics respectively shall be used. The accelerometer is for measuring the acceleration generated in the hammer and consists of acceleration pickup, amplifier and indicator or recorder and, without regarding to their type and combination, the frequency range is flat ( k 1 dB) in a range from 1
40、 Hz to 1 O00 Hz. The value of acceleration is measured with an accuracy of k5 %. The cut-off frequency of the low pass filter for removing the output of unnecessary high frequency is at least five times the frequency corre- sponding to the predicted impact time. Remarks : The frequency characteristi
41、c of the acceleration pickup of strain gauge type is flat from O Hz but that of piezoelectric type may lead to a low response at low frequency, so that care shall be taken. The displacement meter is for measuring the change in thickness of the test piece at the time of impact of the hammer on to the
42、 test piece and consists of displacement pickup, amplifier and indicator or recorder, and the value of dis- placement shall be measured with an accuracy of k 5 %. The speedometer is for measuring the velocity of the hammer at the time of colliding with the test piece and consists of velocity pickup,
43、 amplifier and indi- cator or recorder, and the value of velocity shall be measured with an accuracy of +1%. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 22:07:39
44、MDTNo reproduction or networking permitted without license from IHS -,-,- 4 Z 0235 : 2002 5.3 Test pieces 5.3.1 Sampling of test pieces the samples after 72 h or more elapsed from the manufacture. sample, the sample manufactured under the same condition may be used. The test pieces shall be taken at
45、 random out of When the test pieces of the specified dimensions can not be obtained from one 5.3.2 Dimensions of test piece The dimensions of the test piece are usually, 150 f 5 mm in length, 150 W : load (N); A : area of the surface of test piece to receive the load (mm2). Maximum impact strain The
46、 average value of the maximum impact strain shall be obtained in the same manner as the maximum acceleration, and calcu- lated by the following formula. (2) S d = %-TM x 100 To where, S d : maximum impact strain (%); TO : thickness of test piece before the test (mm); TM : thickness of test piece at
47、the moment of the larg- est strain (mm). Impact permanent strain The impact permanent strain shall be calculated by the following formula. s, = -TD x 100 (3) To where, S, : impact permanent strain (%I; TO : thickness of test piece before the test (mm); TO : thickness of test piece after the test (mm
48、). Record and report of test 5.6.1 Record of test The following items shall usually be described in the test report. Date of the test, temperature and relative humidity during the test Details of test piece (name of product, type, etc.) Mass, dimensions, density or apparent density and material of test piece Water content of test piece Number of test pieces tested Free fall height of hammer, equivalent free fall height or impact speed of ham- mer Total mass of hammer Number of drops of hammer Type and capacity of testing machine used PROTECTED BY COPYRIGHT Copyright Japanes