1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 2558:2010Textile glass chopped-strandmats for reinforcement ofplastics Determination oftime of dissolution of thebinder in styreneBS ISO 2558:2010 BRITISH STANDARDNational
2、 forewordThis British Standard is the UK implementation of ISO 2558:2010.The UK participation in its preparation 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 secr
3、etary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 69442 4ICS 59.100.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publish
4、ed under the authority of theStandards Policy and Strategy Committee on 31 December 2010.Amendments issued since publicationDate Text affectedBS ISO 2558:2010Reference numberISO 2558:2010(E)ISO 2010INTERNATIONAL STANDARD ISO2558Second edition2010-10-01Textile glass chopped-strand mats for reinforcem
5、ent of plastics Determination of time of dissolution of the binder in styrene Mats de verre textile fils coups pour renforcement des matires plastiques Dtermination du temps de dissolution du liant dans le styrne BS ISO 2558:2010ISO 2558:2010(E) PDF disclaimer This PDF file may contain embedded type
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8、mized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights reserved. U
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10、O 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 2558:2010ISO 2558:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organizat
11、ion 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 technical committee has been established h
12、as 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 of electrotechnical standardization. Int
13、ernational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The 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 voting. Public
14、ation as an International Standard requires approval by at least 75 % 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 rights. ISO shall not be held responsible for identifying any or all such patent ri
15、ghts. ISO 2558 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres. This second edition cancels and replaces the first edition (ISO 2558:1974), of which it constitutes a minor revision (in 6.1, the minimum distance from the edge of the mat
16、 at which test specimens may be cut out has been increased to 30 mm and, in 6.2, a requirement has been added to condition not only the specimens but also the styrene before the test). BS ISO 2558:2010BS ISO 2558:2010INTERNATIONAL STANDARD ISO 2558:2010(E) ISO 2010 All rights reserved 1Textile glass
17、 chopped-strand mats for reinforcement of plastics Determination of time of dissolution of the binder in styrene 1 Scope This International Standard specifies a method of determining the time taken for a tensile load to break the bond between the strands of a textile glass chopped-strand mat, used f
18、or the reinforcement of plastics, which is immersed in styrene. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen
19、t (including any amendments) applies. ISO 291, Plastics Standard atmospheres for conditioning and testing 3 Principle A test specimen is suspended vertically in pure styrene and a tensile load applied by means of a weight attached to the Iower end of the specimen. The time taken for the weight to fa
20、ll a specified distance is recorded. NOTE It is possible to distinguish better between mats having binders which are highly soluble in styrene by using a stabilized emulsion of styrene in water (see 5.2), although this can only be done if the binder is completely insoluble in water. 4 Apparatus 4.1
21、Template, for cutting out test specimens measuring 125 mm 100 mm. 4.2 Trimming tool, for example a knife, a pair of scissors or a disc. 4.3 Beaker, minimum capacity 2 000 ml and minimum depth 195 mm. 4.4 Circular sieve, made of stainless steel, to fit the beaker (an example is shown in Figure 1), wi
22、th suspension arms long enough to ensure a distance of 50 mm between the lower clamp and the sieve. This sieve is used to remove the lower clamp and the disintegrated strands from the beaker at the end of the test. 4.5 Pair of clamps, made of stainless steel, suitable for gripping test specimens ove
23、r their whole width. The lower clamp shall have a total mass of 100 g 2 g and shall be balanced. An example of a suitable pair of clamps is shown in Figure 2. 4.6 Stop-watch, accurate to 1 s. BS ISO 2558:2010ISO 2558:2010(E) 2 ISO 2010 All rights reservedDimensions in millimetresKey 1 upper clamp 2
24、test specimen 3 lower clamp 4 sieveFigure 1 Sieve Figure 2 Example of a suitable apparatus 5 Solvent 5.1 Styrene monomer, d20= 0,907. Two litres of styrene allows 150 test specimens to be tested. 5.2 Stabilized emulsion of styrene in water, with a styrene concentration chosen from the following: 80
25、%, 60 %, 40 %, 20 %. Such emulsions can be prepared by the addition of a suitable emulsifying agent. BS ISO 2558:2010ISO 2558:2010(E) ISO 2010 All rights reserved 36 Test specimens 6.1 Selection Use at least five test specimens obtained as follows: Cut a strip measuring at least 125 mm in the roll l
26、ength direction from the whole width of the mat (see Figure 3). Using the template and trimming tool, cut from the strip: one 100 mm 125 mm test specimen at each end of the strip, but not nearer than 30 mm to the edges in the case of mats with trimmed edges and with a suitable extra allowance in the
27、 case of untrimmed mats plus at least three 100 mm 125 mm test specimens evenly distributed over the remaining width, in such a way that the length of the test specimens is parallel with the roll length direction, as shown in Figure 3. Dimensions in millimetres aRoll length direction. Figure 3 Cutti
28、ng out test specimens 6.2 Conditioning Condition the test specimens and styrene (or styrene emulsion) before the test for 1 h at the chosen test temperature (see Clause 7). BS ISO 2558:2010ISO 2558:2010(E) 4 ISO 2010 All rights reserved7 Procedure Carry out the test at one of the temperatures specif
29、ied in ISO 291, recording the chosen temperature in the test report. Ensure that not only the styrene (or styrene emulsion), but also the beaker, sieve and clamps, are at this temperature. It is recommended that a suitable ventilating system capable of dealing with styrene vapours be used. Fix the c
30、lamps to the ends of the test specimen in such a way as to leave a free area of dimensions 100 mm 100 mm between the clamps. Place the sieve (4.4) in the beaker (4.3) partly filled with styrene (5.1) or styrene emulsion (5.2). Immerse the lower clamp and test specimen in the styrene (or styrene emul
31、sion) in the beaker and ensure that the styrene (or styrene emulsion) reaches the level of the upper clamp. The distance between the bottom of the lower clamp and the sieve at this moment shall be 50 mm. Start the stop-watch when the upper clamp touches the rim of the beaker. Stop the stop-watch whe
32、n the lower clamp touches the sieve. Discontinue the test if the break has not occurred within 10 min. Record the time ti, in seconds, indicated by the stop-watch. Repeat the test for the remaining specimens. 8 Expression of results The time of dissolution of the binder of the chopped-strand mat und
33、er test is the arithmetic mean, in seconds (rounded to the nearest second), of the times, ti, noted for all the specimens tested. 9 Test report The test report shall include the following particulars: a) the reference number of this International Standard; b) all details necessary to identify the ma
34、t tested; c) the test temperature; d) the concentration of the styrene emulsion (if used); e) the individual values of the time of dissolution of the binder and their arithmetic mean; f) details of any operations not specified in this International Standard; g) details of any incidents which might h
35、ave influenced the results; h) the date of the test. BS ISO 2558:2010BS ISO 2558:2010ISO 2558:2010(E) ICS 59.100.10 Price based on 4 pages ISO 2010 All rights reserved This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards
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