EN ISO 75-2:2013
(Main)Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite (ISO 75-2:2013)
Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite (ISO 75-2:2013)
ISO 75-2:2013 specifies three methods, using different values of constant flexural stress, which can be used for the determination of the temperature of deflection under load of plastics (including filled plastics and fibre-reinforced plastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite:
method A, using a flexural stress of 1,80 MPa;
method B, using a flexural stress of 0,45 MPa;
method C, using a flexural stress of 8,00 MPa.
Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2013)
Dieser Teil von ISO 75 legt drei Verfahren mit unterschiedlichen Werten von konstanter Biegespannung fest, die zur Bestimmung der Wärmeformbeständigkeitstemperatur von Kunststoffen (einschließlich von gefüllten Kunststoffen und langfaserverstärkten Kunststoffen, bei denen die Faserlänge vor der Verarbeitung bis zu 7,5 mm beträgt) und Hartgummi zur Anwendung kommen können:
Verfahren A, mit einer Biegespannung von 1,80 MPa;
Verfahren B, mit einer Biegespannung von 0,45 MPa;
Verfahren C, mit einer Biegespannung von 8,00 MPa.
Die zur Bestimmung der Wärmeformbeständigkeitstemperatur angewendete Standarddurchbiegung Δs entspricht einer in diesem Teil von ISO 75 festgelegten Biegedehnungserhöhung Δf. Die Anfangsbiege-dehnung bei Belastung des Probekörpers bei Raumtemperatur ist in diesem Teil von ISO 75 weder festgelegt noch wird sie gemessen. Das Verhältnis dieses Unterschieds der Biegedehnung zur Anfangsbiegedehnung ist vom Elastizitätsmodul des geprüften Werkstoffs bei Raumtemperatur abhängig. Dieses Verfahren ist daher nur zum Vergleich von Werkstoffen mit ähnlichen Elastizitätseigenschaften bei Raumtemperatur anwendbar.
ANMERKUNG 1 Die Verfahren geben bei amorphen Thermoplasten eine bessere Vergleichpräzision als bei teilkristal¬linen. Bei einigen Werkstoffen kann es notwendig sein, die Probekörper zu tempern, um zuverlässige Ergebnisse zu erhalten. Falls eine Temperung angewendet wird, führt sie im Allgemeinen zu einem Anstieg der Wärmeformbeständigkeits¬temperatur (siehe 6.6).
ANMERKUNG 2 Zusätzliche Informationen siehe ISO 75 1:—, Abschnitt 1.
Plastiques - Détermination de la température de fléchissement sous charge - Partie 2: Plastiques et ébonite (ISO 75-2:2013)
L'ISO 75-2:2013 spécifie trois méthodes utilisant différentes valeurs de contrainte de flexion constante qui peuvent être utilisées pour la détermination de la température de fléchissement sous charge des plastiques (incluant des plastiques chargés et des plastiques renforcés de fibres, dans lesquels la longueur de fibre avant l'emploi est inférieure ou égale à 7,5 mm) et de l'ébonite:
méthode A, utilisant une contrainte de flexion de 1,80 MPa;
méthode B, utilisant une contrainte de flexion de 0,45 MPa;
méthode C, utilisant une contrainte de flexion de 8,00 MPa.
Polimerni materiali - Določanje temperature upogiba pod obremenitvijo - 2. del: Polimerni materiali in ebonit (ISO 75-2:2013)
V tem delu standarda ISO 75 so navedene tri metode, pri katerih se uporabljajo različne vrednosti stalne upogibne napetosti, ki se lahko uporabijo za določanje temperature upogiba pod obremenitvijo polimernih materialov (vključno s polnjenimi polimernimi materiali in z vlakni ojačenimi polimernimi materiali, v katerih je dolžina vlaken pred obdelavo največ 7,5 mm) in ebonita:
– metoda A, ki uporablja upogibno napetost 1,80 MPa;
– metoda B, ki uporablja upogibno napetost 0,45 MPa;
– metoda C, ki uporablja upogibno napetost 8,00 MPa.
Standardni upogib Δs, s katerim se določa temperatura upogiba pod obremenitvijo, ustreza povečanju upogibne deformacije Δεf, ki je določena v tem delu standarda ISO 75. Začetna upogibna deformacija zaradi obtežb vzorca pri sobni temperaturi ni niti določena niti izmerjena v tem delu standarda ISO 75. Razmerje med tem povečanjem upogibne deformacije in začetno upogibno deformacijo je odvisno od modula elastičnosti preskušanega materiala pri sobni temperaturi. Ta metoda je zato primerna le za primerjanje temperatur upogiba materialov s podobnimi elastičnimi lastnostmi pri sobni temperaturi.
OPOMBA 1: Ta metoda omogoča boljšo reproduktivnost pri amorfnih polimernih materialih kot pri polkristalnih. Pri nekaterih materialih je mogoče treba izvesti žarjenje preskusnih vzorcev, da bi pridobili zanesljive rezultate. Postopki žarjenja, če so uporabljeni, običajno privedejo do povišanja temperature upogiba pod obremenitvijo (glej 6.6). OPOMBA 2: Za nadaljnje informacije glejte ISO 75-1:2013, točka 1.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2013)Plastiques - Détermination de la température de fléchissement sous charge - Partie 2: Plastiques et ébonite (ISO 75-2:2013)Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite (ISO 75-2:2013)83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN ISO 75-2:2013SIST EN ISO 75-2:2013en,fr,de01-december-2013SIST EN ISO 75-2:2013SLOVENSKI
STANDARDSIST EN ISO 75-2:2004/AC:2006SIST EN ISO 75-2:20041DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 75-2
April 2013 ICS 83.080.10 Supersedes EN ISO 75-2:2004English Version
Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite (ISO 75-2:2013)
Plastiques - Détermination de la température de fléchissement sous charge - Partie 2: Plastiques et ébonite (ISO 75-2:2013)
Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 2: Kunststoffe und Hartgummi (ISO 75-2:2013) This European Standard was approved by CEN on 21 March 2013.
CEN members 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 application to the CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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Management Centre:
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B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 75-2:2013: ESIST EN ISO 75-2:2013
Ôléchissement sous cPartie 2: Plastiques et éboniteINTERNATIONAL STANDARDISO75-2Third edition2013-04-15Reference numberISO 75-2:2013(E)SIST EN ISO 75-2:2013
ISO 75-2:2013(E) ii © ISO 2013 – All rights reservedCOPYRIGHT PROTECTED DOCUMENT©
ISO 2013All rights reservedä Unless otherwise speci Ðiedá no part of this publication may be reproduced or utilized otherwise in any form or by any meansá electronic or mechanicalá including photocopyingá or posting on the internet or an intranetá without prior written permissionä Permission can be requested from either ISO at the address below or ISOïs member body in the country of the requester.ISO copyright of ÐiceTel. + 41 22 749 01 11Fax + 41 22 749 09 47Eæmail copyright 7isoäorgWeb www.iso.orgPublished in SwitzerlandSIST EN ISO 75-2:2013
ISO 75-2:2013(E) © ISO 2013 – All rights reserved iiiContents PageForeword .ivIntroduction .v1 Scope .12 Normative references .1 u Terms and de Ðinitions .24 Principle .25 Apparatus .2 wä s Means of producing a
Ðlexural stress .2 wä t Heating equipment .25.3 Weights .25.4 Temperature-measuring instrument .2 wä w De Ðlectionæmeasuring instrument .26 Test specimens.2 xä s General .26.2 Shape and dimensions .26.3 Specimen inspection .36.4 Number of test specimens .36.5 Test-specimen preparation .36.6 Annealing .37 Conditioning .38 Procedure.38.1 Calculation of force to be applied.38.2 Initial temperature of the heating equipment .38.3 Measurement .39 Expression of results .410 Precision .411 Test report .4Annex A (informative) Precision .5Bibliography .9SIST EN ISO 75-2:2013
ISO 75-2:2013(E)Forewordthrough ISO technical committeesä Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizationsá governmental and nonægovernmentalá in liaison with ISOá also take part in the workä electrotechnical standardizationäirectivesá Part
täThe main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for votingä Publication as an International Standard requires approval by at least
y w
¨ of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rightsä ISO shall not be held responsible for identifying any or all such patent rightsäISO 75-2 was prepared by Technical Committee ISO/TC
x sá Plasticsá Subcommittee SC
tá Mechanical properties.revisedä In particulará Clause 5 and Annex A have been updated.ISO
y w consists of the following partsá under the general title
Determination of temperature of de Ôlection under load:— Part
wã General test method— Part
xã Plastics and ebonite— Part
yã Highæstrength thermosetting laminates and longæ Ôibreæreinforced plastics iv © ISO 2013 – All rights reservedSIST EN ISO 75-2:2013
ISO 75-2:2013(E)IntroductionThe
Ðirst editions of ISO
y wæ s and this part of ISOtest loads and two specimen positionsá edgewise and
Ðlatwiseä For testing in the
Ðlatwise positioná test specimens with dimensions
z r mm
s r mm
v mm were requiredä These can be moulded directly or machined from the central section of the multipurpose test specimen (see ISO 20753).as preferredá while still allowing testing in the edgewise position with test conditions given in Annex A with this revisioná the edgewise test position will be removedäTechnical development of testing instruments in recent years made instruments based on a
Ðluidized bed or air ovens availableä These are especially advantageous for use at temperatures at which the common silicone oilæbased heat transfer
Ðluids reach their limit of thermal stabilityä The
Ðluidized bed and air oven methods of heat transfer are introduced in ISO 75-1.An additional precision statement covering the new heating methods is introduced in this part of ISO 75. © ISO 2013 – All rights reserved vSIST EN ISO 75-2:2013
under load —Part 2: Plastics and ebonite1 ScopeThis part of ISO 75 speci Ðies three methodsá using different values of constant
Ðlexural stressá which can be and
Ðibreæreinforced plastics in which the
Ðibre lengthá prior to processingá is up to
yá w ethod Aá using a
Ðlexural stress of
sá z r MPaâethod Bá using a
Ðlexural stress of
rá v w MPaâethod Cá using a
Ðlexural stress of
zá r r MPaäsá used to determine the temperature of de Ðlection under load corresponds to fá de Ðined in this part of ISO
y wä The initial
Ðlexural strain due to the loading of the specimen at room temperature is neither speci Ðied nor measured in this part of ISO
y wä The ratio of this
Ðlexuralæstrain increase to the initial
Ðlexural strain depends on the modulus of elasticityá at room temperatureá of the material under testä This method isá thereforeá only suitable for comparing the temperatures of de Ðlection of materials with similar roomætemperature elastic propertiesäNOTE
s The methods give better reproducibility with amorphous plastics than with semiæcrystalline onesä With some materialsá it can be necessary to anneal the test specimens to obtain reliable resultsä Anneali
...
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