BS ISO 1887-2014 Textile glass Determination of combustible-matter content《纺织玻璃纤维 可燃物质含量测定》.pdf

1、BSI Standards PublicationBS ISO 1887:2014Textile glass Determinationof combustible-matter contentBS ISO 1887:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 1887:2014. Itsupersedes BS ISO 1887:1995 which is withdrawn.The UK participation in its preparation

2、 was entrusted to TechnicalCommittee PRI/42, Fibre reinforced thermosetting plastics andprepregs.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsi

3、ble for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74660 4ICS 59.100.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Pol

4、icy and Strategy Committee on 30 September 2014.Amendments issued since publicationDate Text affectedBS ISO 1887:2014 ISO 2014Textile glass Determination of combustible-matter contentVerre textile Dtermination de la teneur en matires combustiblesINTERNATIONAL STANDARDISO1887Fourth edition2014-09-01R

5、eference numberISO 1887:2014(E)BS ISO 1887:2014ISO 1887:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanica

6、l, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax

7、+ 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 1887:2014ISO 1887:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Terms and definitions . 13 Principle 14 Apparatus . 15 Test specimens 25.1 Selection of test specimens 25.2 Number of t

8、est specimens . 36 Procedure. 36.1 Precautions to be taken during test 36.2 Weighing the specimen holder 36.3 Weighing the dried test specimen plus holder 46.4 Weighing the calcinated test specimen plus holder 47 Expression of results 58 Precision . 59 Test report . 5BS ISO 1887:2014ISO 1887:2014(E)

9、ForewordISO (the International Organization for Standardization) is 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 te

10、chnical committee has been established has the right to be represented 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

11、of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This documen

12、t was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility 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

13、 patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does

14、 not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informat

15、ionThe committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres.This fourth edition cancels and replaces the third edition (ISO 1887:1995), which has been technically revised.iv ISO 2014 All rights reservedBS ISO 1887:2014INTERNATIONAL S

16、TANDARD ISO 1887:2014(E)Textile glass Determination of combustible-matter content1 ScopeThis International Standard specifies a method for the determination of the combustible-matter content of products made from textile glass, such as continuous-filament yarns, staple-fibre yarns, rovings, chopped

17、strands, milled fibres, fabrics, chopped-strand and continuous-filament mats, and other glass reinforcements.2 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.2.1combustible-matter contentratio of the mass of material removed on calcination from a dr

18、ied textile glass product to the mass of the dried productNote 1 to entry: This ratio is expressed as a percentage in this International Standard. It is equal to the content of size or finish on the textile glass product when the size or finish is completely combustible without significant residue (

19、i.e. primarily organic products).3 PrincipleTest specimens, dried under prescribed conditions, are weighed before and after calcination at a temperature of 625 C 20 C or, with types of glass which are unstable at this temperature, at a temperature between 500 C and 600 C, also kept constant to withi

20、n 20 C.4 Apparatus4.1 Air-circulation oven, for drying specimens, capable of being maintained at 105 C 5 C or the chosen drying temperature and maintained to within 5 C (see 6.3).4.2 Muffle furnace, capable of being maintained, with a tolerance of 20 C, at any desired temperature up to 625 C, the te

21、mperature being measured at the centre of the muffle furnace with the door closed.4.3 Desiccator, containing a suitable desiccant, for example silica gel, calcium chloride, phosphorous(V) oxide.4.4 Specimen holder, made from a material stable at the test temperature, allowing the best possible air c

22、irculation around the test specimen and designed to prevent loss of material. The holder may be a porcelain crucible, a basket made of stainless-steel gauze, etc.4.5 Stainless-steel tongs, for handling test specimens and holders.4.6 Balance, accurate to 0,1 mg.4.7 Polished-metal templates, for the p

23、reparation of test specimens. ISO 2014 All rights reserved 1BS ISO 1887:2014ISO 1887:2014(E)4.8 Suitable cutting tool, for cutting mat or fabric, for example a knife, scissors, or a cutting disc.4.9 Suitable wrap-reel, for taking yarn and roving test specimens.5 Test specimens5.1 Selection of test s

24、pecimensUnless stated to the contrary in the product specification or by the person requesting the test, the test specimens shall be selected as specified in 5.1.1 to 5.1.4.5.1.1 Yarns and rovingsTable 1 gives the length of yarn to be taken as a function of the linear density of the yarn. The test s

25、pecimen shall not be unduly compressed, in order to ensure that the air will circulate as freely as possible and that drying and calcination will therefore be complete.Table 1Linear density, Tt texLength of yarn mTt = 25 50025 Tt = 45 20045 Tt = 280 100280 Tt = 650 50650 Tt = 2 000 102 000 Tt 55.1.2

26、 Chopped strands and milled fibresEach specimen shall have a mass of not less than 5 g, but preferably between 15 g and 30 g.5.1.3 FabricsEach specimen shall have a mass of not less than 5 g.The recommended specimen shape is a rectangle measuring 150 mm 80 mm. Cut the specimen out using the template

27、 (4.7) and the cutting tool (4.8) and fray out the edges over about 5 mm to prevent any subsequent loss of yarns.If it is necessary to use more than one rectangle to achieve the required minimum specimen mass, these shall be taken along the length of the roll, in the same lane.The test-specimen dime

28、nsions shall be compatible with the apparatus (muffle furnace, balance). If for this reason it has not been possible to comply with the specified dimensions or the 5 g minimum mass, this shall be mentioned in the test report (see also 5.2).5.1.4 MatsThe test specimen shall have a mass of at least 5

29、g. The recommended specimen shape is a square measuring 316 mm 316 mm (0,1 m2). However, other shapes may be used provided that the area is approximately 0,1 m2. In this case, it is necessary to modify slightly the preparation procedure described below.2 ISO 2014 All rights reservedBS ISO 1887:2014I

30、SO 1887:2014(E)If it is necessary to use more than one square to achieve the required minimum specimen mass, these shall be taken along the length of the roll, in the same lane.Cut a strip of width at least 316 mm from across the whole width of the mat. Using the template (4.7) and the cutting tool

31、(4.8), cut from this strip:a) at each end (in the case of mats with trimmed edges, at least 10 mm inside the edges), a test specimen measuring 316 mm 316 mm;b) between these end specimens, as many test specimens measuring 316 mm 316 mm as the remaining width allows (these test specimens shall be eve

32、nly distributed).5.2 Number of test specimensUnless stated to the contrary or in more detail (i.e. number and location) in the specification or by the person requesting the test, the number of test specimens taken per elementary unit shall be as specified in Table 2.Table 2Type of productNumber of t

33、est specimensYarns, roving 1Chopped strands, milled fibres1Fabrics, mats 3 for each metre of width, repeated regularly across the full widthNOTE The number of test specimens used for each determination of the combustible-matter content can be modified depending on the type of elementary unit, which

34、can come in very different forms. In addition, a determination might have to be repeated at one or more locations in the elementary unit depending on the mass (chopped strands, milled fibre) or the length (fabrics, mats) of the elementary unit being tested. The additional information concerning the

35、number and location of these specimens can be given in the product specification or by the person requesting the test.6 Procedure6.1 Precautions to be taken during test6.1.1 Ensure that the test specimen does not come into contact with the furnace during the carbonization stage.6.1.2 Always transfer

36、 the test specimen plus holder with care to prevent loss of material.6.1.3 Never tauch the test specimen with the bare hands.6.2 Weighing the specimen holderStabilize the mass of the specimen holder (4.4) by placing it in the muffle furnace (4.2), maintained at 625 C 20 C or, if the type of glass be

37、ing tested is unstable at this temperature, at a temperature between 500 C and 600 C, also maintained to within 20 C. The temperature between 500 C and 600 C shall be chosen either on the basis of the specification for the glass or by agreement between the interested parties.Allow the holder to cool

38、 in the desiccator (4.3), to ambient temperature. ISO 2014 All rights reserved 3BS ISO 1887:2014ISO 1887:2014(E)Weigh the holder and note the mass to the nearest 0,1 mg (m0).Repeat the heating, cooling and weighing operations until constant mass is reached (see, however, note 3 in 6.4).6.3 Weighing

39、the dried test specimen plus holderPlace the holder with a specimen in the oven (4.1), maintained at 105 C 5 C or, in the case of products containing components which are volatile, or susceptible to change, at this temperature, a lower temperature chosen by agreement between the interested parties a

40、nd also maintained to within 5 C.NOTE For fabrics and mats, the specimens can be cut and stacked rather than folded, in order to put them in a holder which fits into the apparatus (muffle furnace, balance).Heat the specimen for at least 30 min.Remove the holder plus specimen from the drying oven and

41、 allow to cool in the desiccator (4.3) for 30 min.Weigh the holder plus dried specimen and note the mass to the nearest 0,1 mg (m1).Repeat the heating, cooling and weighing operations until constant mass is reached (see, however, note 3 in 6.4).6.4 Weighing the calcinated test specimen plus holderPl

42、ace the holder plus dried specimen in the muffle furnace (4.2), maintained at 625 C 20 C or at the chosen temperature between 500 C and 600 C (see 6.2).Allow the specimen to burn for 5 min with the door of the furnace open (see notes 1 and 2). Then close the door of the furnace and heat for a furthe

43、r more than 10 min or, if a temperature lowers than 625 C is used, for at least a further 1 h.Remove the holder plus specimen from the furnace and transfer to the desiccator (4.3). Allow to cool to ambient temperature.Weigh the holder plus calcinated specimen and note the mass to the nearest 0,1 mg

44、(m2).Repeat the heating, cooling, and weighing operations until constant mass is reached (see, however, note 3).NOTE 1 The door is left open to allow volatile products to escape from the furnace, thus preventing condensible materials being redeposited on the specimen or on the holder.NOTE 2 If a ven

45、tilated furnace is used, this open-door time is not necessary.NOTE 3 The test method requires that all weighings be confirmed to be to constant mass by repetition of the drying and calcination stages. In cases in which known materials are being tested regularly, the user of this International Standa

46、rd is permitted to define, by experimentation, a minimum time for the drying and calcination stages to ensure that constant mass has been obtained.4 ISO 2014 All rights reservedBS ISO 1887:2014ISO 1887:2014(E)7 Expression of resultsThe combustible-matter content of a test specimen, expressed as a pe

47、rcentage by mass of the dried product, is given by the formula:Hmmmm11210100= whereH1is the combustible-matter content;m0is the mass, in grams, of the holder;m1is the mass, in grams, of the holder plus the dried specimen;m2is the mass, in grams, of the holder plus the dried and calcinated specimen.T

48、ake as the result of the determination of the combustible-matter content either the result obtained with the single test specimen if only one was used or the average of the results obtained, if more than one specimen was used, and express the result to two places of decimals.If this determination is

49、 repeated for several locations in the elementary unit, the person requesting the test shall stipulate if each determination is to be reported separately or if the average of the different determinations is to be calculated to obtain the test result for the whole elementary unit.8 PrecisionThe precision of this test method is not known because inter-laboratory data are not available. Inter-laboratory data are being obtained and a precision statement will be added at the following revision.9 Test repor