1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 7619-1:2010 Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness)BS ISO 7619-1:2010 BRITISH STANDARD Natio
2、nal foreword This British Standard is the UK implementation of ISO 7619-1:2010. It supersedes BS ISO 7619-1:2004 + A1:2008 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/22, Physical testing of rubber. A list of organizations represented on this
3、committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2010 ISBN 978 0 580 65431 2 ICS 83.060 Compliance with a British Standard cannot confer immunity from
4、 legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2010. Amendments issued since publication Date Text affectedBS ISO 7619-1:2010Reference number ISO 7619-1:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 7619-1 Second
5、edition 2010-10-01 Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) Caoutchouc vulcanis ou thermoplastique Dtermination de la duret par pntration Partie 1: Mthode au duromtre (duret Shore) BS ISO 7619-1:2010 ISO 7619-1:2010(E) PDF di
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10、 member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 7619-1:2010 ISO 7619-1:2010(E) ISO 2010 All rights
11、reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Principle and choice of durometer type1 4 Apparatus.2 4.1 Durometer types A, D and AO2 4.2 Durometer type AM .4 4.3 Stand.4 4.4 Durometer spring force calibration .5 5 Test pieces .5 5.1 General .5 5.2 Thickness
12、.5 5.3 Surface6 6 Conditioning and test temperature6 7 Procedure.6 7.1 General .6 7.2 Test time.6 7.3 Measurements .6 8 Calibration and checking6 8.1 Calibration6 8.2 Checking using standard rubber blocks.7 9 Precision.7 10 Test report7 Annex A (informative) Precision for the type AM durometer compa
13、red to that of Micro IRHD testing.8 Bibliography10 BS ISO 7619-1:2010 ISO 7619-1:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International St
14、andards is normally carried out through ISO technical committees. 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 organizations, governmental and non-governmental, in liaison with ISO, also
15、 take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committee
16、s is to prepare International Standards. 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. Attention is drawn to the possib
17、ility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7619-1 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis. This s
18、econd edition cancels and replaces the first edition (ISO 7619-1:2004), which has been technically revised to update the references to ISO 18898 for instrument calibration and ISO 23529 for the preparation of test pieces. It also incorporates the Amendment ISO 7619-1:2004/Amd.1:2008 which gives prec
19、ision data (see Annex A). ISO 7619 consists of the following parts, under the general title Rubber, vulcanized or thermoplastic Determination of indentation hardness: Part 1: Durometer method (Shore hardness) Part 2: IRHD pocket meter method BS ISO 7619-1:2010 ISO 7619-1:2010(E) ISO 2010 All rights
20、reserved vIntroduction The hardness of rubber, as measured by a durometer (Shore hardness) or an IRHD pocket meter, is determined from the response of the rubber to an applied indentation. The response is a complex one and will depend upon: a) the elastic modulus of the rubber; b) the viscoelastic p
21、roperties of the rubber; c) the thickness of the test piece; d) the geometry of the indentor; e) the pressure exerted; f) the rate of increase of pressure; g) the interval after which the hardness is recorded. Because of these factors, it is inadvisable to relate results using a durometer (Shore har
22、dness) directly to IRHD values, although correlations have been established for some individual rubbers and compounds. Durometers were originally portable hand-held instruments that have proved to be particularly convenient for making measurements on products. Some laboratories now also use them on
23、a stand with a weight applied to the pressure foot in order to improve precision. NOTE ISO 48 1specifies hardness measurements for determination of hardness between 10 IRHD and 100 IRHD. Further information on the relationship between the durometer values and IRHD values is given in the literature 5
24、67 . BS ISO 7619-1:2010BS ISO 7619-1:2010 INTERNATIONAL STANDARD ISO 7619-1:2010(E) ISO 2010 All rights reserved 1Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) WARNING Persons using this part of ISO 7619 should be familiar with no
25、rmal laboratory practice. This part of ISO 7619 does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. CAUTION
26、 Certain procedures specified in this part of ISO 7619 may involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use. 1 Scope This part of
27、ISO 7619 specifies a method for determining the indentation hardness (Shore hardness) of vulcanized or thermoplastic rubber using durometers with the following scales: the A scale for rubbers in the normal-hardness range; the D scale for rubbers in the high-hardness range; the AO scale for rubbers i
28、n the low-hardness range and for cellular rubbers; the AM scale for thin rubber test pieces in the normal-hardness range. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undate
29、d references, the latest edition of the referenced document (including any amendments) applies. ISO 18898, Rubber Calibration and verification of hardness testers ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods 3 Principle and choice of durom
30、eter type The property measured is the depth of penetration of a specified indentor forced into the material under specified conditions. BS ISO 7619-1:2010 ISO 7619-1:2010(E) 2 ISO 2010 All rights reservedWhen using durometers, the scale should be chosen as follows: for values less than 20 with a ty
31、pe D durometer: type A; for values less than 20 with a type A durometer: type AO; for values over 90 with a type A durometer: type D; for thin test pieces (less than 6 mm thick): type AM. 4 Apparatus 4.1 Durometer types A, D and AO These durometers consist of the components specified in 4.1.1 to 4.1
32、.5. 4.1.1 Pressure foot The pressure foot for types A and D shall have a diameter of 18 mm 0,5 mm and a central hole of diameter 3 mm 0,1 mm. For type AO, the pressure foot shall have a minimum area of 500 mm 2with a central hole of diameter 5,4 mm 0,2 mm. The tolerances on the dimension of the cent
33、ral hole and the requirement for the size of the pressure foot only apply to instruments used on a stand. 4.1.2 Indentor The indentor shall be formed from a hardened-steel rod of diameter 1,25 mm 0,15 mm to the shape and dimensions shown in Figure 1 for type A durometers and Figure 2 for type D duro
34、meters. Type AO durometers shall have a round indentor with a radius of 2,5 mm 0,02 mm in accordance with Figure 3. 4.1.3 Indicating device This is a device for allowing the extent of protrusion of the point of the indentor beyond the face of the pressure foot to be read. It shall be calibrated dire
35、ctly in terms of units ranging from 0 for the maximum protrusion of 2,50 mm 0,02 mm to 100 for zero protrusion obtained by placing the pressure foot and indentor in firm contact with a suitable flat, hard surface (e.g. glass). 4.1.4 Calibrated spring This is used to apply a force, F, expressed in mi
36、llinewtons, to the indentor in accordance with one of the following equations: For type A durometers: F = 550 + 75H Awhere H Ais the hardness reading taken from the type A durometer. For type D durometers: F = 445H Dwhere H Dis the hardness reading taken from the type D durometer. For type AO durome
37、ters: F = 550 + 75H AOwhere H AOis the hardness reading taken from the type AO durometer. BS ISO 7619-1:2010 ISO 7619-1:2010(E) ISO 2010 All rights reserved 3Dimensions in millimetres Dimensions in millimetresaThe protrusion shown is valid for a reading of 0. aThe protrusion shown is valid for a rea
38、ding of 0. Figure 1 Indentor for type A durometer Figure 2 Indentor for type D durometer Dimensions in millimetres Dimensions in millimetresaThe protrusion shown is valid for a reading of 0. aThe protrusion shown is valid for a reading of 0. Figure 3 Indentor for type AO durometerFigure 4 Indentor f
39、or type AM durometer4.1.5 Automatic timing device (optional) The timer shall be automatically activated when the pressure foot is in contact with the test piece and shall indicate the end of the test time or lock the test value at its completion. Use of a timing device for the test time improves pre
40、cision. When the instrument is used on a stand, the time tolerance shall be 0,3 s. BS ISO 7619-1:2010 ISO 7619-1:2010(E) 4 ISO 2010 All rights reserved4.2 Durometer type AM This durometer consists of the components specified in 4.2.1 to 4.2.5. 4.2.1 Pressure foot The pressure foot shall have a diame
41、ter of 9 mm 0,3 mm and a central hole of diameter 1,19 mm 0,03 mm. 4.2.2 Indentor The indentor shall be formed from a hardened-steel rod of diameter 0,79 mm 0,025 mm to the shape and dimensions shown in Figure 4. 4.2.3 Indicating device This is a device for allowing the extent of protrusion of the p
42、oint of the indentor beyond the face of the pressure foot to be read. It shall be calibrated directly in terms of units ranging from 0 for the maximum protrusion of 1,25 mm 0,01 mm to 100 for zero protrusion obtained by placing the pressure foot and indentor in firm contact with a suitable flat, har
43、d surface (e.g. glass). 4.2.4 Calibrated spring This is used to apply a force, F, expressed in millinewtons, to the indentor in accordance with the equation: F = 324 + 4,4H AMwhere H AMis the hardness reading taken from the type AM durometer. 4.2.5 Automatic timing device (optional) The timer shall
44、be automatically activated when the pressure foot is in contact with the test piece and shall indicate the end of the test time or lock the test value at its completion. Use of a timing device for the test time improves precision. The time tolerance shall be 0,3 s. 4.3 Stand 4.3.1 Better precision i
45、s obtained by using a stand with a weight centred on the axis of the indentor to apply the pressure foot to the test piece. Durometer types A, D and AO may be used either as pocket meters by hand or mounted on a stand. Type AM durometers shall always be mounted on a stand. 4.3.2 The operating stand
46、shall be capable of supporting the pressure-foot surface of the durometer parallel to the test piece support table. 4.3.3 The stand shall be capable of applying the test piece to the indentor, or vice versa, without shock. NOTE A maximum speed of 3,2 mm/s has been found to be suitable. 4.3.4 The tot
47、al mass of the durometer and extra mass to overcome the spring force shall be: 0,1 0 1 + kg for types A and AO; 0,5 0 5 + kg for type D; 0,05 0 0, 25 + kg for type AM. BS ISO 7619-1:2010 ISO 7619-1:2010(E) ISO 2010 All rights reserved 54.4 Durometer spring force calibration The force values shall be
48、 in accordance with Table 1. Table 1 Durometer spring forces Spring force mN Indicated durometer value Type AM Type A and AO Type D 0 324 550 10 368 1 300 4 450 20 412 2 050 8 900 30 456 2 800 13 350 40 500 3 550 17 800 50 544 4 300 22 250 60 588 5 050 26 700 70 632 5 800 31 150 80 676 6 550 35 600
49、90 720 7 300 40 050 100 764 8 050 44 500 Millinewtons (mN) per unit 4,4 75 445 Spring force tolerance 8,8 37,5 222,5 NOTE For hand-held durometers, the tolerances may be increased; in particular, the spring force tolerance can be doubled. 5 Test pieces 5.1 General Test pieces shall be prepared in accordance with ISO 23529. 5.2 Thickness For the determination of hardness using type A, D and AO durometers, the thickness of the test piece shall be
