1、BRITISH STANDARD BS EN ISO 1110:1998 Incorporating Amendment No. 1 to BS ISO 1110:1995 (renumbers the BS as BS EN ISO 1110:1998) Plastics Polyamides Accelerated conditioning of test specimens The European Standard EN ISO 1110:1997 has the status of a British Standard ICS 83.080.20BSENISO1110:1998 Th
2、is British Standard, having been prepared under the directionof the Sector Board forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes intoeffect on 15March1996 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference PRI
3、/35 Draft for comment 93/303016 DC ISBN 0 580 25534 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/35, Speciality thermoplastics moulding materials, upon which the following bodies were represented: British Plastic
4、s Federation British Telecommunications plc Department of the Environment (National Physical Laboratory) ERA Technology Ltd. Electrical Installation Equipment Manufacturers Association (BEAMA) Federation of the Electronics Industry Ministry of Defence PERATEC Ltd. RAPRA Technology Ltd. Society of Mo
5、tor Manufacturer and Traders Limited Amendments issued since publication Amd. No. Date Comments 10263 October 1998 Implementation of BS EN ISO 1110BSENISO1110:1998 BSI 05-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Foreword iii Text of ISO 1110 1BSE
6、NISO1110:1998 ii BSI 05-1999 National foreword This British Standard has been prepared by Technical Committee PRI/33, and is the English language version of EN ISO1110:1997 Plastics Polyamides Accelerated conditioning of test specimens published by the European Committee for Standardization (CEN). I
7、t is identical with ISO1110:1995 published by the International Organization for Standardization (ISO). This British Standard is published under the direction of the Sector Board for Materials and Chemicals whose Technical Committee PRI/35 has the responsibility to: aid enquirers to understand the t
8、ext; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas stand
9、ards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. 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 a British Standard does not of
10、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, page 2, the ISO title page, pages ii to iv, pages 1 and 2, an inside back cover and abackcover. This standard has been updated (see copy
11、right date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1110 November 1997 ICS 83.080.20 Descriptors: See ISO document English version Plastics Polyamides Accelerated condit
12、ioning of testspecimens (ISO 1110:1995) Plastiques Polyamides Conditionnement acclr dprouvettes (ISO 1110:1995) Kunststoffe Polyamide Beschleunigte Konditionierung von Probekrpern (ISO 1110:1995) This European Standard was approved by CEN on 16 October 1997. CEN members are bound to comply with the
13、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 Central Secretariat or
14、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 same status as the official versio
15、ns. 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 United Kingdom. CEN European Committee for Standardization Comit Europen
16、 de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN ISO 1110:1997 EENISO1110:1997 BSI 05-1999 2 Foreword The text of the Inte
17、rnational Standard from Technical Committee ISO/TC 61, Plastics, of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 249, Plastics, the secretariat of which is held by IBN. This European Standard shall be given the stat
18、us of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1998, and conflicting national standards shall be withdrawn at the latest by May 1998. According to CEN/CENELEC Internal Regulations, the following countries are bound to implement this Euro
19、pean Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom. Endorsement notice The text of the International Standard ISO1110:1995 has been approved by
20、 CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative).ISO1110:1995(E) ii BSI 05-1999 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Normative references 1 3 Principle 1 4 Apparatus 1 5 Procedure 1 6 Referen
21、ce procedure 2 Annex ZA (normative) Normative references to international publications with their relevant European publications Inside back cover Table 1 Periods of time for accelerated conditioning 2ISO1110:1995(E) BSI 05-1999 iii Foreword ISO (the International Organization for Standardization) i
22、s 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 technical committee has been established has the right to be represe
23、nted 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 matters of electrotechnical standardization. Draft International Standards
24、 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 1110 was prepared by Technical Committee ISO/TC61, Plastics, Subcommittee SC
25、 9, Thermoplastic materials. This third edition cancels and replaces the second edition (ISO 1110:1987), which has been technically revised.iv blankISO1110:1995(E) BSI 05-1999 1 Introduction Various properties of polyamides (PA) depend upon their moisture content. Reproducible values of these proper
26、ties can only be obtained with specimens having a specified moisture content. Such specimens are obtained by conditioning, i.e.by allowing them to reach equilibrium in an atmosphere with a specified temperature and relative humidity. The rate of moisture absorption and, therefore, the rate of condit
27、ioning, is a function of the temperature. This rate is very low at room temperature. For example, a 4mm thick test specimen of PA66 requires more than a year to attain its equilibrium moisture content in standard atmosphere 23/50 (see ISO 291). To condition specimens in a relatively short period of
28、time, higher temperatures are required. Such a method for accelerated conditioning is presented in this International Standard. 1 Scope This International Standard describes a method for the accelerated conditioning of test specimens of polyamides and copolyamides. It is applicable to grades contain
29、ing fillers and other additives, but not to grades containing more than2 % (m/m) extractables. The equilibrium moisture content attained by this method is close to the equilibrium moisture content obtained in standard atmosphere 23/50. The values of mechanical properties obtained after accelerated c
30、onditioning in accordance with this method may differ slightly from those obtained after conditioning in standard atmosphere 23/50. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the ti
31、me of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO main
32、tain registers of currently valid International Standards. ISO 291:1977, Plastics Standard atmospheres for conditioning and testing. ISO 483:1988, Plastics Small enclosures for conditioning and testing using aqueous solutions to maintain relative humidity at constant value. 3 Principle The test spec
33、imens are stored in an atmosphere of70C1C and (62 1)% relative humidity (psychrometric temperature difference of10C3C) until moisture absorption by the specimen has reached at least 95% of its equilibrium level. 4 Apparatus 4.1 Cabinet, with closed air circulation by a fan, capable of maintaining a
34、temperature of 70C within a tolerance of 1C and a psychrometric temperature difference of 10C within a tolerance of 0,3C, corresponding to a relative humidity of(62 1)%. 4.2 If a cabinet as described in4.1 is not available 4.2.1 Oven, capable of maintaining the temperature at 70C1C. 4.2.2 Closed con
35、tainer, for example a desiccator, partially filled with a saturated aqueous solution of potassium iodide in accordance with the general procedure specified in ISO483. Leave excess salt in contact with the solution throughout the conditioning. The specimens may become slightly discoloured by the abso
36、rption of iodine. 4.3 Analytical balance, accurate to 0,1mg. 5 Procedure Place the test specimens in the preheated cabinet(4.1) or in the closed container (4.2.2) in the oven (4.2.1). By suitable means, for example racks, ensure that the surface of each specimen is almost completely exposed to the s
37、urrounding atmosphere. After conditioning for a period of time t 1 , as indicated inTable 1, remove the specimens from the cabinet or the container, allow them to cool for 1h in standard atmosphere 23/50 (see ISO291) and weigh them to the nearest 0,1mg. Thereafter, continue the accelerated condition
38、ing of the specimens and repeat the weighings, as above, at intervals of time t 2as indicated inTable 1. The periods of time t 1and t 2shall not be less than 1 day. When three consecutive weighings lie within a tolerance of 0,1%, the conditioning is assumed to be completed (see note 1). Place the sp
39、ecimens in standard atmosphere 23/50 for at least 1 h before testing. In cases of PA not mentioned inTable 1, use the values of t 1and t 2indicated for group II, unless a plot of the mass of the specimens versus the conditioning time shows that the values for group I may be used.ISO1110:1995(E) 2 BS
40、I 05-1999 NOTE 1Under these conditions, the specimens will have acquired a moisture content equal to at least 95% of the equilibrium value. A prolongation of the conditioning beyond this point will have no noticeable effect on the properties of the specimens. 6 Reference procedure In cases of disput
41、e, the test specimens shall be conditioned in the cabinet (4.1). Table 1 Periods of time for accelerated conditioning t 1(days) t 2(days) Group PA in a cabinet in a container (4.1) (4.2.2) I 6, 66, 11, 12, 6/66, 46 h 2 h 2 h 2 II 69, 610, 612, IND/INDT, 61/6T h 2 2h 2 h 2 NOTEh is the thickness, in
42、millimetres, of the specimens. 1 3 - 1 8 - 2 3 - 1 4 -ENISO1110:1997 BSI 05-1999 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. Th
43、ese 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 only when incorporated in it by amendment or revision. For unda
44、ted references the latest edition of the publication referred to applies. Publication Title EN Date ISO 291 Plastics Standard atmospheres for conditioning and testing EN ISO 291 1997BS EN ISO 1110:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nat
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