1、BRITISH STANDARD BS EN ISO 14632:1999 Extruded sheets of polyethylene (PE-HD) Requirements and test methods The European Standard EN ISO 14632:1998 has the status of a British Standard ICS 83.080.20BSEN ISO 14632:1999 This British Standard, having been prepared under the directionof the Sector Commi
2、tteefor Materials andChemicals, was published underthe authority of the Standards Committee and comes into effect on 15 March 1999 BSI 05-1999 ISBN 0 580 32254 8 National foreword This British Standard is the English language version of ENISO14632:1998. It is identical with ISO14632:1998. The UK par
3、ticipation in its preparation was entrusted to Technical Committee PRI/75, Plastics and rubber film and sheets, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for cha
4、nge, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Stan
5、dards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “In
6、ternational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with
7、 a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page, pages2 to10 and a back cover. This standard has been updated (see copyright date) and may have had amend
8、ments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN ISO 14632:1999 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN ISO 14632 3ii blankEUROPEAN STANDARD NORME
9、 EUROPENNE EUROPISCHE NORM EN ISO 14632 December 1998 ICS 83.140 Descriptors: Plastics, polyethylene, extruded products, plates, designation, delivery condition, dimensions, dimensional tolerances, mechanical properties, thermal properties, tests, marking English version Extruded sheets of polyethyl
10、ene (PE-HD) Requirements and test methods (ISO14632:1998) Plaques extrudes en polythylne (PE-HD) Prescriptions et mthodes dessai (ISO14632:1998) Extrudierte Tafeln aus Polyethylen (PE-HD) Anforderungen und Prfverfahren (ISO14632:1998) This European Standard was approved by CEN on2October1998. CEN me
11、mbers are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on applica
12、tion to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the
13、 same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee
14、 for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14632:1998 EENISO 14632:1998 BSI 0
15、5-1999 2 Foreword The text of ENISO14632:1998 has been prepared by Technical Committee CEN/TC249 “Plastics”, the secretariat of which is held by IBN, in collaboration with Technical Committee ISO/TC61 “Plastics”. This European Standard shall be given the status of a national standard, either by publ
16、ication of an identical text or by endorsement, at the latest by June1999, and conflicting national standards shall be withdrawn at the latest by June1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this E
17、uropean Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom. Annex A is normative. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Mate
18、rial 3 4 Requirements 3 5 Test methods 5 6 Designation 8 7 Marking 9 Annex A (normative) Requirements for rectangularity 10 Figure 1 Difference between diagonals (|d 1 d 2 |) 4 Table 1 Tolerances for length and width of sheet 4 Table 2 Mechanical and thermal properties 5 Table 3 Maximum shrinkage fo
19、r thermoforming applications 5 Table 4 Accuracy of equipment 6 Table 5 Shrinkage for general applications 7 Table 6 Shrinkage for thermoforming applications 7 Table A.1 Rectangularity tolerances (see4.2.3) 10ENISO 14632:1998 BSI 05-1999 3 1 Scope This standard specifies the requirements and test met
20、hods for solid flat extruded sheets of polyethylene homopolymers (PE HD) without fillers or reinforcing materials. This standard applies only to thicknesses of0,5mm to40mm. This standard also applies to PE HD sheet in rolled form. 2 Normative references This European standard incorporates, by dated
21、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 apply to this European standard onl
22、y when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN ISO 179, Plastics Determination of Charpy impact strength (ISO179:1993). EN ISO 291, Plastics Standard atmospheres for conditioning and testing (ISO291:1997). EN I
23、SO 527-1, Plastics Determination of tensile properties Part1: General principles. (ISO527-1:1993 including Corr1:1994) EN ISO 527-2, Plastics Determination of tensile properties Part2: Test conditions for moulding and extrusion plastics. (ISO527-2:1993 including Corr1:1994) ISO 1 133, Plastics Deter
24、mination of the melt mass flow rate (MFR) and the melt volume flow rate (MVR) of thermoplastics. ISO 1 183, Plastics Methods for determining the density and relative density of non-cellular plastics. ISO 1 872-1, Plastics Polyethylene (PE) moulding and extrusion materials Part1: Designation system a
25、nd basis for specifications. EN ISO 2 818, Plastics Preparation of test specimens by machining. (ISO2818:1994) ISO/TR 9 080, Thermoplastics pipes for the transport of fluids Methods of extrapolation of hydrostatic stress rupture data to determine the long-term hydrostatic strength of thermoplastics
26、pipe materials. 3 Material Sheets consist of PE extrusion compounds designated by ISO1872-1 without fillers or reinforcing materials. Extrusion compounds can contain additives such as processing aids, stabilisers, flame protective agents and colorants. Compounds and additives of unknown identity sha
27、ll not be used. NOTELegal requirements can cause a specific choice of extrusion compounds (see4.3.3). 4 Requirements 4.1 Appearance Sheets shall be substantially free from bubbles, voids, cracks, visible impurities and other defects which would make them unfit for the intended use. Surfaces shall be
28、 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 any of the above sha
29、ll be agreed between the interested parties. Sheets shall be examined in accordance with5.3. 4.2 Dimensional tolerances 4.2.1 Thickness Within any individual sheet, referring to the nominal thickness, the tolerance on thickness shall be: Where: |% h| # |0,08 mm + 0,03 h n | (1) % h is the tolerance
30、on thickness, in millimetres h n is the nominal thickness, in millimetresENISO 14632:1998 4 BSI 05-1999 Testing shall be in accordance with5.4.1. 4.2.2 Length and width Nominal length, l n , and nominal width, b n , of sheets shall be agreed between the interested parties. Unless agreed differently,
31、 the length shall 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 withTable 1. Testing shall be in accordance with5.4.2. Table 1 Tolerances for length and width of sheet For rolled sheets the m
32、inimum length shall be the nominal length. 4.2.3 Rectangularity For any individual sheet, selected at random from any delivery, the rectangularity tolerance expressed as the difference between the length of the diagonals (| d 1 d 2 |, seeFigure 1) shall be in accordance withTable A.1 ofAnnex A (norm
33、ative) Testing shall be in accordance with5.4.3. 4.2.4 Bow of sheets in rolled form For sheets in rolled form, a maximum bow of20mm in10metres length is permissible. Testing shall be in accordance with5.4.4. Dimensions in millimetres Nominal value of dimension, D n Tolerances Length Width D n# 500 5
34、00 D n# 1 000 1 000 D n# 1 500 1 500 D n# 2 000 2 000 D n# 3 000 3 000 D n# 4 000 Figure 1 Difference between diagonals (|d 1 - d 2 |) + 2 1 + 2 1 + 3 1 + 3 1 + 4 1 + 4 1 + 6 1 + 4 1 + 8 1 + 6 1 + 11 1 + 7 1ENISO 14632:1998 BSI 05-1999 5 4.3 Properties 4.3.1 Mechanical and thermal properties Table 2
35、 Mechanical and thermal properties 4.3.2 Behaviour after heating 4.3.2.1 Maximum shrinkage for 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 with5.10 andTable 5. 4.3.2.
36、2 Maximum shrinkage for thermoforming applications The maximum shrinkage in the direction of extrusion shall not exceed the values given inTable 3 when measured using the method in5.10 and the conditions given inTable 6. Table 3 Maximum shrinkage for thermoforming applications 4.3.3 Physiological be
37、haviour Relevant legislation concerning physiological behaviour shall be taken into consideration. 5 Test methods 5.1 Test specimens 5.1.1 Preparation of test specimens Representative test specimens shall be cut longitudinally and transversely from locations evenly distributed over the length and wi
38、dth 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 production
39、these shall be eliminated without damaging the surfaces of the test specimen. If required, the cut edges shall be finished with abrasive paper (grain number220 or finer), the direction of abrasion being along the length of the test specimens. If it is necessary to machine the sheet to reduce it to t
40、he thickness required, one original surface shall be left intact. In particular, test specimens over4,2mm thick intended to be used in the tests described in5.6 to5.8 shall be machined down on one side to a thickness of4,0mm 0,2mm in accordance with ENISO2818. Properties Unit Requirements (average v
41、alues) Test method subclause PE-HD sheet group 1 a 2 3 4 Density g/cm 3 0,95 to 0,96 0,94 to 0,96 0,95 to 0,96 $ 0,96 5.5 Tensile stress at yield MPa $ 20 $ 15 $ 20 $ 25 5.6 Tensile strain at yield % $ 10 $ 8 $ 8 $ 8 5.6 Modulus of elasticity in tension MPa $ 700 $ 700 $ 900 $ 1200 5.7 Charpy impact
42、 strength of notched specimens k J/m 2 $ 10 $ 6 $ 10 $ 15 5.8 MFR 190 C/5 kg g/10 min 0,4 to 0,7 0,1 to 2,0 0,1 to 2,0 0,1 to 2,0 5.9 a Sheets of group 1 shall be manufactured from extrusion compounds (black, UV-stabilized with 2 % carbon black) complying with specific requirements for creep rupture
43、 strength defined in accordance with ISO/TR9080 and shall be approved by all interested parties. Nominal thickness, h n(mm) 0,5 1 2 4 6 8 10 10 Maximum shrinkage in the direction of extrusion (%) 75 70 60 50 40 35 30 not applicableENISO 14632:1998 6 BSI 05-1999 5.1.2 Conditioning All test specimens
44、shall be conditioned for at least16hours at standard atmosphere (23) in accordance with ENISO291. 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. 5.1.3 Testing Testing shall be
45、carried out at standard atmosphere (23) in accordance with ENISO291, unless agreed differently between the interested parties or specified differently in the individual testing standards. 5.2 Delivery condition Sheets should be visually examined when delivered to ensure freedom from mechanical damag
46、e or other obvious defects. Sheets can be inspected by means of ultrasonics or X-rays where required. 5.3 Appearance 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 defe
47、cts thus identified shall be compared with the agreed specification (either in written or sample form) and sentenced accordingly. 5.4 Dimensions 5.4.1 Thickness (h) The thickness, h, shall be measured using a suitable calibrated equipment according toTable 4: Table 4 Accuracy of equipment 5.4.2 Leng
48、th (l) and width (b) The length, l, and width, b, shall be measured to the nearest1 mm using a suitable calibrated equipment. Measurements shall be made directly on the surface of the sheet and along the cut edge. 5.4.3 Rectangularity For flat sheets, the rectangularity expressed as the difference b
49、etween the length of the diagonals according toFigure 1, |d 1 d 2 |, shall be measured to the nearest1mm using a calibrated ruler or tape measure. 5.4.4 Bow of sheets in rolled form For sheets in rolled form, the bow shall be determined after the sheets have been pulled freely from the rolls and measured against a straight line. The bow shall be measured to the nearest1mm using a suitable calibrated equipment. 5.5 Density Density shall be determined in accordanc
