ISO-9054-1990.pdf
《ISO-9054-1990.pdf》由会员分享,可在线阅读,更多相关《ISO-9054-1990.pdf(8页珍藏版)》请在三一文库上搜索。
1、INTERNATIONAL STANDARD IS0 9054 First edition 1990-12-15 Cellular plastics, rigid - Test methods for self-skinned, high-density materials Plastiques a/volaires rigides - MBthodes d essai pour /es produits 8 peau intrZgr6e et B haute densite Reference number IS0 9054:1990(E) Copyright International O
2、rganization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:18:37 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9054:1990(E) Foreword IS0 (the international Organization for Standa
3、rdization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right t
4、o be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft Internati
5、onal Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna- tional Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 9054 was prepared by Technical Committee ISO/TC 61, Plastic
6、s. Annex A forms an integral part of this International Standard. 0 IS0 1990 All rights reserved. No part of thls publlcatlon may be reproduced or utilized In any form or by any means, electronic or mechanical, including photocopying and mlcrofllm, without permlssion In wrltlng from the publlsher. l
7、nternatlonal Organizatlon for Standardization Case Postale 56 l CH-1211 Gen integral-skin foam: structural foam: A rigid cellular material, with an integral surface skin formed during manufacture, which has either: 6 Test methods a) one or more surface zones with an apparent density substantially gr
8、eater than that of the core material; or b) a relatively uniform density. 4 Test specimens Ail tests for material properties shall be as agreed upon between purchaser and supplier. These tests will vary from material to material depending upon the ultimate use of the finished material. it should be
9、recognized that properties are influenced by the variation of the density in the direction of the thick- ness. Where IS0 test methods are unavailable or cannot be used for determining the property values as set forth in these clauses, national practice shall be the guiding factor. Where the form and
10、 thickness of the finished product are known, the thickness of the specimen shall be “as produced”. in those instances where the final form and shape of the product are unknown, or where the thickness of the part is variable, the test thickness shall be as agreed upon by the purchaser and supplier.
11、When a test specimen is mouided ex- pressly for test purposes, the identical conditions, as specified by the material supplier for use in the production of the finished product, shall be used in- sofar as is practical. 6.1 Apparent density See IS0 845. The linear dimensions shall be measured with an
12、 accuracy of 0,Ol mm (in accordance with IS0 1923) and the mass to an accuracy of 0,l g. 6.2 Bending strength When test specimens are cut from a finished part or a part mouided expressly for test purposes, no specimen is to be cut from within an area closer to any edge than 20 mm. Test specimens may
13、 be cut from finished parts whose thickness is at least 10 mm. Ail test speci- mens shall be machined in such a manner that no irregularities are produced at the cut edges. Test specimens shall not be cut from any part until at least 72 h have elapsed from the time of pro- duction of the test part.
14、See IS0 178, which determines the bending stress and deflection at break or at 10 mm and 20 mm de- flection. if the specimen does not break (rupture) before reaching 20 mm deflection, stop the test and caicu- late the bending stress at 10 mm and 20 mm de- flection. if the specimen breaks between 10
15、mm and 20 mm, report the bending stress at 10 mm as well as the deflection at break. 5 Conditioning and testing 6.3 Impact strength The impact strength shall be determined by a failing dart test method (see IS0 6603-I). 5.1 Conditioning Ail test specimens shall be conditioned for a mini- mum of 16 h
16、 after cutting (preparation) in an atmos- phere as set forth in IS0 291. The preferred conditions are 23 “C f 2 “C and 50 % + 5 % R.H. For tropical climates, the conditions are 27 “C + 2 “C and 65 % f 5 % R.H. Other condi- tioning atmospheres may be used as agreed be- tween the purchaser and supplie
17、r. Preferably, an instrumented failing dart apparatus should be used (see IS0 6603-2). 6.4 Tensile test See IS0 1926. The specimens shall be tested in the thickness as produced and with skins intact. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Li
18、censee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:18:37 MDTNo reproduction or networking permitted without license from IHS -,-,- 6.5 Shear test IS0 9054:1990(E) 7 Test results The procedure used shall be that described in IS0 1922, except that the specimens shall be tested
19、in the thickness as produced and with the skins in- tact. The specimen shall have a length not less than 12 times its thickness and a width not less than twice its thickness. The report shall include the following information: a) a reference to this international Standard; b) a complete identificati
20、on of the tested material: - materiaf supplier, 6.6 Screw retention See annex A. 6.7 Surface hardness See IS0 868. 6.8 Thermal conductance See IS0 8301 or IS0 8302. 6.9 Burning behaviour As required by national practice. 6.10 Dielectric strength See IEC 243. 6.11 Linear thermal expanslon See IS0 489
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO 9054 1990
链接地址:https://www.31doc.com/p-3779626.html