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1、A Reference number ISO 14632:1998(E) INTERNATIONAL STANDARD ISO 14632 First edition 1998-12-15 Extruded sheets of polyethylene (PE-HD) Requirements and test methods Plaques extrudes en polythylne (PE-HD) Prescriptions et mthodes dessai Copyright International Organization for Standardization Provide
2、d by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14632:1998(E) ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be
3、reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printed in Switzerland i
4、i Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a
5、 technical committee has been established has the right to be represented on that committee. International organizations, governmental and non- governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matt
6、ers of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 14632
7、 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 61, Plastics, Subcommittee SC 11, Products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this standard, read
8、“. this European Standard .” to mean “. this International Standard .”. Annex A forms an integral part of this International Standard. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/
9、2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 14632:1998(E) iii The text of EN ISO 14632:1998 has been prepared by Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN, in collaboration with Technical Committee ISO/TC 61
10、“Plastics“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 1999, and conflicting national standards shall be withdrawn at the latest by June 1999. According to the CEN/CENELEC Internal Regul
11、ations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the U
12、nited Kingdom. Annex A is normative. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright
13、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 14632:1998(E) 1 1Scope This standard specifies the
14、 requirements and test methods for solid flat extruded sheets of polyethylene homopolymers (PE - HD) without fillers or reinforcing materials. This standard applies only to thicknesses of 0,5 mm to 40 mm. This standard also applies to PE - HD sheet in rolled form. 2Normative references This European
15、 standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications ap
16、ply to this European standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN ISO 179Plastics - Determination of Charpy impact strength (ISO 179:1993) EN ISO 291Plastics - Standard atmospheres for conditionin
17、g and testing (ISO 291:1997) EN ISO 527- 1Plastics - Determination of tensile properties Part 1: General principles (ISO 527-1:1993 including Corr 1:1994) EN ISO 527-2Plastics - Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics (ISO 527-2:1993 including
18、Corr 1:1994) ISO 1 133Plastics - Determination of the melt mass - flow rate (MFR) and the melt volume - flow rate (MVR) of thermoplastics ISO 1 183Plastics - Methods for determining the density and relative density of non - cellular plastics ISO 1 872-1Plastics - Polyethylene (PE) moulding and extru
19、sion materials Part 1: Designation system and basis for specifications EN ISO 2 818Plastics - Preparation of test specimens by machining (ISO 2818:1994) ISO/ TR 9 080Thermoplastics pipes for the transport of fluids - Methods of extrapolation of hydrostatic stress rupture data to determine the long-t
20、erm hydrostatic strength of thermoplastics pipe materials 3Material Sheets consist of PE extrusion compounds designated by ISO 1 872-1 without fillers or reinforcing materials. Extrusion compounds can contain additives such as processing aids, stabilisers, flame protective agents and colorants. Comp
21、ounds and additives of unknown identity shall not be used. NOTE: Legal requirements can cause a specific choice of extrusion compounds (see 4.3.3). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for R
22、esale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14632:1998(E) ISO 2 4Requirements 4.1Appearance Sheets shall be substantially free from bubbles, voids, cracks, visible impurities and other defects which would make them unfit for the intended u
23、se. Surfaces shall be substantially smooth and free from sharp grooves, sink marks or damage. Colorants shall be homogeneously distributed throughout the material. Slight colour differences due to the particular extrusion compound or processing procedure used are admissible. Admissible variations in
24、 any of the above shall be agreed between the interested parties. Sheets shall be examined in accordance with 5.3. 4.2Dimensional tolerances 4.2.1Thickness Within any individual sheet, referring to the nominal thickness, the tolerance on thickness shall be: I hI I0,08 mm + 0,03 x hnI( 1 ) Where: h i
25、s the tolerance on thickness, in millimetres hn is the nominal thickness, in millimetres Testing shall be in accordance with 5.4.1. 4.2.2Length and width Nominal length , ln, and nominal width , bn, of sheets shall be agreed between the interested parties. Unless agreed differently, the length shall
26、 be in the direction of extrusion. For any individual sheet selected at random from any delivery, the tolerances on length and width shall be in accordance with table 1. Testing shall be in accordance with 5.4.2. Table 1: Tolerances for length and width of sheet Dimensions in millimetres Nominal val
27、ue of dimension, Dn Tolerances Length Width Dn 500+ 2 - 1 + 2 - 1 500 2 % carbon black) complying with specific requirements for creep rupture strength defined in accordance with ISO/ TR 9 080 and shall be approved by all interested parties. 4.3.2Behaviour after heating 4.3.2.1 Maximum shrinkage for
28、 general applications For general applications, the maximum shrinkage in the direction of extrusion shall be less than three percent after heating. Testing shall be in accordance with 5.10 and table 5. Copyright International Organization for Standardization Provided by IHS under license with ISO Li
29、censee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14632:1998(E) ISO 4 4.3.2.2. Maximum shrinkage for thermoforming applications The maximum shrinkage in the direction of extrusion shall not e
30、xceed the values given in table 3 when measured using the method in 5.10 and the conditions given in table 6. Table 3: Maximum shrinkage for thermoforming applications Nominal thickness, hn (mm)0,51246810 10 Maximum shrinkage in the direction of extrusion (%) 75706050403530not applicable 4.3.3Physio
31、logical behaviour Relevant legislation concerning physiological behaviour shall be taken into consideration. 5Test methods 5.1Test specimens 5.1.1Preparation of test specimens Representative test specimens shall be cut longitudinally and transversely from locations evenly distributed over the length
32、 and width of the sheet. From a sheet in roll form, a two metre sample shall be cut from the end of the roll to provide test specimens. Surfaces of the test specimens shall be free from damage and other defects in order to avoid notch effects. Should any burrs occur on the test specimens during prod
33、uction these shall be eliminated without damaging the surfaces of the test specimen. If required, the cut edges shall be finished with abrasive paper (grain number 220 or finer), the direction of abrasion being along the length of the test specimens. If it is necessary to machine the sheet to reduce
34、 it to the thickness required, one original surface shall be left intact. In particular, test specimens over 4,2 mm thick intended to be used in the tests described in 5.6 to 5.8 shall be machined down on one side to a thickness of 4,0 mm 0,2 mm in accordance with EN ISO 2 818. 5.1.2Conditioning All
35、 test specimens shall be conditioned for at least 16 hours at standard atmosphere (23) in accordance with EN ISO 291. Shorter conditioning times shall be used by agreement between the interested parties when it can be shown that there is no significant difference in the results obtained. 5.1.3Testin
36、g Testing shall be carried out at standard atmosphere (23) in accordance with EN ISO 291, unless agreed differently between the interested parties or specified differently in the individual testing standards. 5.2Delivery condition Sheets should be visually examined when delivered to ensure freedom f
37、rom mechanical damage or other obvious defects. Sheets can be inspected by means of ultrasonics or X-rays where required. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40
38、 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 14632:1998(E) 5 5.3Appearance Where possible, sheets shall be examined for visual defects by transmitted light using a suitable light source. Otherwise, sufficiently bright reflected light should be used. Any defects t
39、hus identified shall be compared with the agreed specification (either in written or sample form) and sentenced accordingly. 5.4Dimensions 5.4.1Thickness (h) The thickness, h, shall be measured using a suitable calibrated equipment according to table 4: Table 4: Accuracy of equipment Dimensions in m
40、illimetres Nominal thickness, hnAccuracy 0,50 hn 1,00 + 0,01 1,00 4 mm shall be determined in accordance with EN ISO 179/ 1eA using at least 10 test specimens in each direction. 5.9Melt mass-flow rate (MFR) Melt mass-flow rate (MFR 190/ 5) shall be determined in accordance with ISO 1 133. 5.10Determ
41、ination of shrinkage after heating At least three test specimens with dimensions of 100 mm x 100 mm shall be cut from the centre and two sides of the sheet. The side test specimens shall be taken at least 50 mm from the edge of the sheet. The extrusion direction of the sheet shall be marked on the s
42、pecimens at a minimum of two places.The initial length, Lo, in the direction of extrusion shall be measured on the marked places with an accuracy of 0,1 mm after conditioning of the specimens in accordance with EN ISO 291. The specimens shall be dusted with kaolin and shall be placed flat on a kaoli
43、n bed in an oven with air circulation. The temperature and duration of the test are shown in table 5 and table 6. Table 5: Shrinkage for general applications Nominal thickness, hn mm Test temperature C Duration of test1) min 0,5 hn 2110 260 1 2 550 to 900 x 1 0004 900 to1 500 x 1 0005 1 500 to 4000
44、x 1 0006 550 x 1 2203 550 to 800 x 1 2204 800 to 1 100 x 1 2205 1 100 to 1 750 x 1 2206 1 750 to 4 000 x 1 2207 550 x 1 5003 550 to 750 x 1 5004 750 to 1 000 x 1 5005 1 000 to 1 350 x 1 5006 1 350 to 1 850 x 1 5007 1 850 to 3 000 x 1 5008 3 000 to 4 000 x 15009 500 x 2 0003 500 to 700 x 20004 700 to
45、 900 x 2 0005 to 1 150 x 2 0006 1 150 to 1 450 x 2 0007 1 450 to 1 800 x 2 0008 1 800 to 2 300 x 2 0009 2300 to 3 000 x 2 00010 3 000 to 4 000 x 2 00011 500 x 30003 500 to 700 x 30004 700 to 850 x 3 0005 850 to 1 050 x 3 0006 1 050 to 1 250 x 3 0007 1 250 to 1 500 x 3 0008 1500 to 1 700 x 3 0009 1 7
46、00 to 2 000 x 3 00010 2 000 to 2 300 x 3 00011 2 300 to 2 700 x 3 00012 2 700 to 3 100 x 3 00013 3 100 to 3 700 x 3 00014 3 700 to 4 000 x 3 00015 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Re
47、sale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14632:1998(E) ISO ICS 83.140.10 Price based on 9 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:15:40 MDTNo reproduction or networking permitted without license from IHS -,-,-