1、March 2014 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、83.080.20!%,_“2099060www.din.deDDIN EN ISO 306Plastics Thermoplastic materials Determination of Vicat softening temperature (VST) (ISO 306:2013);English version EN ISO 306:2013,English translation of DIN EN ISO 306:2014-03Kunststoffe Thermoplaste Bestimmung der Vicat-Erweichungstemperatur (VST) (ISO
3、 306:2013);Englische Fassung EN ISO 306:2013,Englische bersetzung von DIN EN ISO 306:2014-03Plastiques Matires thermoplastiques Dtermination de la temprature de ramollissement Vicat (VST) (ISO 306:2013);Version anglaise EN ISO 306:2013,Traduction anglaise de DIN EN ISO 306:2014-03SupersedesDIN EN IS
4、O 306:2004-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 24 pages02.14 DIN EN ISO 306:2014-03 2 A comma is used as the decimal marker. National foreword This document (EN ISO 306:2013) has been prepared by Technical Committee ISO/TC
5、 61 “Plastics” (Secretariat: SAC, China) in collaboration with Technical Committee CEN/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Committee NA 054-01-02 AA Mechanis
6、che Eigenschaften und Probekrper-herstellung. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 291 DIN EN ISO 291 ISO 293 DIN EN ISO 293 ISO 294-1 DIN EN ISO 294-1 ISO 294-2 DIN EN ISO 294-2 ISO 294-3 DIN EN ISO 294-3 ISO 472 DIN EN ISO
7、472 ISO 2818 DIN EN ISO 2818 ISO 20753 DIN EN ISO 20753 (draft stage) Amendments This standard differs from DIN EN ISO 306:2004-10 as follows: a) heating equipment, consisting of a fluidized bed, has been introduced as a new apparatus; b) Annex B (informative) “Comparison of VST results obtained wit
8、h liquid-filled heating bath and fluidized bed” has been added; c) precision data have been extended and included as Annex C (informative) “Repeatability and precision”; d) Clause 3 “Terms and definitions” has been added; e) the standard has been editorially revised. Previous editions DIN 53460: 196
9、5-10, 1969-09, 1976-12 DIN ISO 306: 1990-09 DIN EN ISO 306: 1997-01, 2004-10 DIN EN ISO 306:2014-03 3 National Annex NA (informative) Bibliography DIN EN ISO 291, Plastics Standard atmospheres for conditioning and testing DIN EN ISO 293, Plastics Compression moulding of test specimens of thermoplast
10、ic materials DIN EN ISO 2941, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimens DIN EN ISO 2942, Plastics Injection moulding of test specimens of thermoplastic materials Part 2: Small tensile bars
11、DIN EN ISO 2943, Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Small plates DIN EN ISO 472, Plastics Vocabulary DIN EN ISO 2818, Plastics Preparation of test specimens by machining E DIN EN ISO 20753, Plastics Test specimens DIN EN ISO 306:2014-03 4 This page is in
12、tentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM November 2013 ICS 83.080.20 Supersedes EN ISO 306:2004English Version Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST) (ISO 306:2013) Plastiques - Matires thermoplastiques - Dtermination de la
13、temprature de ramollissement Vicat (VST)(ISO 306:2013) Kunststoffe - Thermoplaste - Bestimmung der Vicat-Erweichungstemperatur (VST) (ISO 306:2013) This European Standard was approved by CEN on 2 November 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
14、 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 application to the CEN-CENELEC Management Centre or to any CEN member. This European Stand
15、ard 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the nati
16、onal standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slo
17、vakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means
18、 reserved worldwide for CEN national Members. Ref. No. EN ISO 306:2013 EEN ISO 306 Contents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Terms and definitions 5 4 Principle 6 5 Apparatus 6 6 Test frame assembly calibration 9 7 Test specimens 10 8 Conditioning . 10 9 Pro
19、cedure 10 10 Precision . 11 11 Test report . 11 Annex A (informative) Comparison of VST results obtained with liquid-filled heating bath and direct-contact heating unit 13 Annex B (informative) Comparison of VST results obtained with liquid-filled heating bath and fluidized bed . 15 Annex C (informa
20、tive) Repeatability and precision 17 Bibliography 20 2DIN EN ISO 306:2014-03EN ISO 306:2013 (E) This document (EN ISO 306:2013) has been prepared by Technical Committee ISO/TC 61 in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This European St
21、andard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2014, and conflicting national standards shall be withdrawn at the latest by May 2014. Attention is drawn to the possibility that some of the elements of this d
22、ocument may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 306:2004. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries ar
23、e bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Po
24、rtugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 306:2013 has been approved by CEN as EN ISO 306:2013 without any modification. Foreword“Plastics”3DIN EN ISO 306:2014-03 EN ISO 306:2013 (E) IntroductionThis revision in
25、troduces heating equipment, consisting of a fluidized bed, as a new apparatus; this is as an alternative to liquid-filled heating baths and direct-contact heating units. Fluidized beds can reach higher temperatures than traditional liquid-filled heating baths; therefore, they represent a suitable wa
26、y to measure the Vicat softening temperature (VST) of thermoplastic materials having improved thermo-mechanical properties.It was also felt necessary to add precision data based on round robin testing performed in 2009, and comparison data for tests with liquid-filled and fluidized bed.4DIN EN ISO 3
27、06:2014-03EN ISO 306:2013 (E) 1 ScopeThis International Standard specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials: method A50 using a force of 10 N and a heating rate of 50 K/h; method B50 using a force of 50 N and a heating rate of 50
28、K/h; method A120 using a force of 10 N and a heating rate of 120 K/h; method B120 using a force of 50 N and a heating rate of 120 K/h.The methods specified are applicable only to thermoplastics, for which they give a measure of the temperature at which the thermoplastics start to soften rapidly.2 No
29、rmative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
30、 applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 293, Plastics Compression moulding of test specimens of thermoplastic materialsISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose
31、and bar test specimensISO 294-2, Plastics Injection moulding of test specimens of thermoplastic materials Part 2: Small tensile barsISO 294-3, Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Small platesISO 472, Plastics VocabularyISO 2818, Plastics Preparation of te
32、st specimens by machiningISO 20753, Plastics Test specimens3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 472 and the following apply.3.1penetrationdistance over which the indenting tip has to penetrate into the specimen under testNote 1 to entry: It
33、 is expressed in millimetres (mm).5DIN EN ISO 306:2014-03 EN ISO 306:2013 (E) 3.2loadforce applied to test specimen by means of the indenting tipNote 1 to entry: It is expressed in Newtons (N).3.3Vicat softening temperatureVSTtemperature at which a flat-ended needle penetrates the specimen to a dept
34、h of 1 mm under a specified load using a selected uniform rate of temperature riseNote 1 to entry: It is expressed in degrees Celsius (C).4 PrincipleThe temperature at which a standard indenting tip with a flat point penetrates 1 mm into the surface of a plastic test specimen is determined. The inde
35、nting tip exerts a specified force perpendicular to the test specimen, while the specimen is heated at a specified and uniform rate.The temperature, in degrees Celsius, of the specimen, measured as close as possible to the indented area at 1 mm penetration, is quoted as the VST.5 Apparatus5.1 Heatin
36、g equipment, consisting of one of the following (5.1.1, 5.1.2 or 5.1.3) that will accept a minimum of two test frame assemblies and a cooling device (5.1.4).The heating equipment shall be provided with means of temperature control, enabling the temperature to be raised at a uniform rate of (50 5) K/
37、h or (120 10) K/h.The heating rate shall be verified either by checking and recording automatically over the whole temperature range, or by manually checking and recording the temperature change at 6-min intervals over the temperature range being verified.The requirement for the heating rate shall b
38、e considered satisfied if, over every 6-min interval during the test, the temperature change is (5 0,5) C or (12 1) C, respectively. For multiposition heating equipment, the heating rate shall be verified at each test station. The apparatus may be designed to shut off the heat automatically and soun
39、d an alarm when the specified indentation has been reached.5.1.1 Liquid-filled heating bath, containing a liquid in which the test specimen can be immersed to a depth of at least 35 mm. Liquid paraffin, transformer oil, glycerol and silicone oil are suitable liquid heat-transfer media, but other liq
40、uids may be used. An efficient stirrer shall be provided. It shall be established that the liquid chosen is stable at the temperature used and does not affect the material under test, for example by swelling or cracking. Do not heat the liquid filled heating bath in excess of the flash point specifi
41、ed by the heat transfer media manufacturer.5.1.2 Direct-contact heating unit, containing heaters and blocks, which through conductive heating, raise the temperature of the specimen at a controlled rate until the VST is reached.5.1.3 Fluidized bed, containing a powder bed (e.g. aluminium oxide powder
42、), in which the test specimen can be immersed to a depth of at least 35 mm. This type of apparatus uses a micrometric aluminium oxide powder, which when mixed with a suitable flow of heated air, creates a liquid-like heating medium. The maximum working temperatures (and measurable VSTs) are therefor
43、e much higher than those attainable 6DIN EN ISO 306:2014-03EN ISO 306:2013 (E) with liquids according to 5.1.1. An efficient stirring mechanism shall be provided, in order to achieve a temperature homogeneity in the specimen area analogous to the case of a liquid-filled heating bath.5.1.4 Cooling de
44、vice, as an optional means to reduce the temperature of the heating device; it may be used to reduce the time between tests.5.2 Test frame assemblies (see Figures 1 and 2), consisting of the following.5.2.1 Rod and frame, provided with a support plate or other suitable load-application device, held
45、in a rigid metal frame. The rod shall be able to move freely, with minimum friction, in a vertical direction. The rod shall be designed to accept weights that will apply the test load. The base of the frame supports the test specimen under the indenting tip at the end of the rod (see Figures 1 and 2
46、). It is recommended that the rod and the frame(s) be constructed of low thermal expansion material.5.2.2 Indenting tip, preferably of hardened steel, 1,5 mm to 3 mm long, of circular cross-section and of area (1,000 0,015) mm2(corresponding to an indenting-tip diameter of (1,128 0,008) mm), fixed a
47、t the bottom of the rod (5.2.1). The surface of the indenting tip in contact with the specimen shall be flat and perpendicular to the axis of the rod, and free from burrs.5.2.3 Weights, applied to the rod (5.2.1) centrally, so that the total load applied to the test specimen is (10 0,2) N for method
48、s A50 and A120 and (50 1) N for methods B50 and B120.5.2.4 Penetration-measuring device, calibrated micrometer dial gauge, LVDT (linear variable differential transformer) or other suitable measuring instrument to measure the penetration of the indenting tip into the test specimen to an accuracy of 0
49、,01 mm.5.2.5 Temperature-measuring device.5.2.5.1 For a liquid-filled bath and a fluidized bed, use a suitable temperature-measuring instrument of appropriate range and accurate to within 0,5 K. Thermometers shall be calibrated at the depth of immersion required by 5.1.1 and 5.1.3. The temperature-measuring device shall be positioned as close as possible to both the indenting tip and the specimen, but avoiding
