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1、BRITISH STANDARD BS ISO 1268-9:2003 Fibre-reinforced plastics Methods of producing test plates Part 9: Moulding of GMT/STC ICS 83.120 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1268-9:2003 This British Standard was published un
2、der the authority of the Standards Policy and Strategy Committee on 14 April 2003 BSI 14 April 2003 ISBN 0 580 41555 4 National foreword This British Standard reproduces verbatim ISO 1268-9:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to T
3、echnical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications refer
4、red to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provis
5、ions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
6、or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 4, an inside back cover an
7、d a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 126
8、8-9:2003(E) INTERNATIONAL STANDARD ISO 1268-9 First edition 2003-03-15 Fibre-reinforced plastics Methods of producing test plates Part 9: Moulding of GMT/STC Plastiques renforcs de fibres Mthodes de fabrication de plaques dessai Partie 9: Moulage des GMT/STC BS ISO 12689:2003 Licensed Copy: sheffiel
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13、oilm, wittuoh repmissii non writign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Published in Switzerland ii IS
14、O 3002 Allr ihgtsser edevr BS ISO 12689:2003 ii Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-9:2003(E) I SO 3002 All irhgts seredevr iii Contents Page Forewordiv 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Heal
15、th and safety 2 5 Principle.2 6 Materials.2 7 Plate dimensions.2 8 Reinforcement content.2 9 Apparatus.2 10 Procedure.3 11 Usable area of test plate.4 12 Verification of the characteristics of the plate obtained.4 13 Test plate preparation report.4 BS ISO 12689:2003 iii Licensed Copy: sheffieldun sh
16、effieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-9:2003(E) iv I SO 3002 All irhgts seredevr Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Intern
17、ational 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 represented on that committee. International organizations, governmental and non-governmental, in liaison with
18、 ISO, also 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
19、 committees 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
20、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 rights. ISO 1268-9 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres
21、. Together with the other parts (see below), this part of ISO 1268 cancels and replaces ISO 1268:1974, which has been technically revised. ISO 1268 consists of the following parts, under the general title Fibre-reinforced plastics Methods of producing test plates: Part 1: General conditions Part 2:
22、Contact and spray-up moulding Part 3: Wet compression moulding Part 4: Moulding of prepregs Part 5: Filament winding Part 6: Pultrusion moulding Part 7: Resin transfer moulding Part 8: Compression moulding of SMC and BMC Part 9: Moulding of GMT/STC Part 10: Injection moulding of BMC and other long-f
23、ibre moulding compounds General principles and moulding of multipurpose test specimens Part 11: Injection moulding of BMC and other long-fibre moulding compounds Small plates BS ISO 12689:2003 iv Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) B
24、SI INTENRATIONAL TSANDADR IS-8621 O9:(3002E) I SO 3002 All irhgts seredevr 1 Fibre-reinforced plastics Methods of producing test plates Part 9: Moulding of GMT/STC 1 Scope This part of ISO 1268 specifies a method for preparing test plates by compression moulding of reinforced thermoplastic sheet (GM
25、T/STC) to be used for the preparation of test specimens to determine the mechanical and physical properties of the laminate. The proposed method is applicable to laminates made from a thermoplastic matrix reinforced with glass, carbon, aramid or other reinforcing fibres, alone or in combination and
26、in any form suitable for compression moulding. This part of ISO 1268 is intended to be read in conjunction with ISO 1268-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For unda
27、ted references, the latest edition of the referenced document (including any amendments) applies. ISO 527-4, Plastics Determination of tensile properties Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites ISO 1172, Textile-glass-reinforced plastics Prepregs, mo
28、ulding compounds and laminates Determination of the textile-glass and mineral-filler content Calcination methods ISO 1268-1, Fibre-reinforced plastics Methods of producing test plates Part 1: General conditions ISO 1268-4, Fibre-reinforced plastics Methods of producing test plates Part 4: Moulding o
29、f prepregs 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 GMT the abbreviation generally accepted within the industry for Glass-fibre Mat reinforced Thermoplastic sheet, in which the thermoplastic is generally polypropylene 3.2 STC the accep
30、ted abbreviation for any kind of Sheet Thermoplastic Composite, irrespective of the type of the polymer or the nature or form of the reinforcement BS ISO 12689:2003 1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-9:2003(E) 2 I SO
31、3002 All irhgts seredevr 4 Health and safety See ISO 1268-1. 5 Principle This method is based on a compression-moulding procedure using a normal commercial press, a plate mould and the moulding conditions recommended by the supplier of the GMT/STC material. The material concerned, cut to the require
32、d size and heated to the moulding temperature, is inserted in the centre of the mould cavity. The mould is closed and the material allowed to flow and solidify under pressure. It is absolutely essential for the cavity to be complete filled. The method may nevertheless be used for materials which do
33、not flow in the mould, but changes are required in the procedure. 6 Materials The method may be used for all types of GMT/STC material, irrespective of the type of thermoplastic polymer used or the type and nature of the reinforcement, providing the material is suitable for compression moulding. The
34、 method is designed for materials which flow during the moulding process. Materials which do not flow during the moulding process can be moulded by this method, but consideration should also be given to using the method given in ISO 1268-4, which may be more suitable for the high-fibre-content, high
35、-melt-temperature STC materials. 7 Plate dimensions 7.1 Surface area of mould: at least 200 mm 200 mm but larger if test specimens cut from the plate are to conform to the requirements of ISO 527-4. 7.2 Plate thickness: (4 0,2) mm. 8 Reinforcement content Unless otherwise specified, it is assumed th
36、at the reinforcement content and reinforcement orientation are uniform in the x and y planes of the moulded plate. In cases where the reinforcement orientation is non- uniform, the specification of the test plate shall define the orientation required in the test plate and the stacking sequence of th
37、e material in the mould. 9 Apparatus 9.1 Hydraulic moulding press, with a closing speed of at least 15 mm/s and capable of a 2 000 kN mould- clamping force. 9.2 Temperature-controlled plate mould, with a minimum width of 200 mm and a recommended length of 590 mm, mounted on the press (9.1). NOTE Oth
38、er mould sizes may be used by agreement between the interested parties, but the shape of the mould affects the flow of the material during moulding and hence the fibre orientation and the properties of the resultant material. BS ISO 12689:2003 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27
39、 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-9:2003(E) I SO 3002 All irhgts seredevr 3 9.3 Oven, capable of heating the material uniformly both over the whole surface area and through the whole thickness to within 2 C. The heating time shall be measurable to within 1 s. The end of t
40、he heating time shall be indicated by an optical or acoustic signal. NOTE The method of heating may affect the temperature distribution and the material consistency and even cause degradation of the polymer. Such effects may also cause variability of the test results. To avoid such unwanted effects
41、on the material, heating by contact with heating plates covered by mould release foil is recommended. The heating time depends upon the material and its thickness. It shall be determined by measuring the temperature of the material in a separate heating test. Usually, it is between 2 min and 5 min f
42、or a thickness of about 4 mm. When heating more than one layer, the heating time will have to be increased. 10 Procedure 10.1 Blank size Since the test plates are moulded in a flow-moulding process, only about 50 % of the mould area needs to be covered by the stack of blanks. NOTE A blank is a squar
43、e or rectangular section cut from the material concerned. If the thickness of the blanks is in the range 3,7 mm to 3,8 mm, take two equally sized square blanks of a size sufficient to give a plate 4 mm thick. If the sheets are thinner, the number of blanks may be increased. If the sheets are thicker
44、, the number of blanks may be reduced to one. If the material concerned will not flow in the mould, the blanks shall be the same size as the mould and sufficient in number to give a moulded plate of the correct thickness. 10.2 Stacking the blanks When two blanks are used, they shall be stacked at 0/
45、90 in the case of randomly reinforced materials and at 0/0 in the case of unidirectionally reinforced material. Three or more blanks shall be stacked symmetrically (0/90/0, 0/90/90/0). 10.3 Preheating the blanks The stack of blanks shall be loaded as a stack into the oven and heated to the temperatu
46、re recommended by the manufacturer for the material concerned, paying particular attention to the requirements specified in 9.3. Should material show evidence of smoking during heating, this is an indication of thermo-oxidative degradation and shall be avoided. Material that has been seen to smoke d
47、uring heating shall not be used for moulding test plates. Alternatively, evidence of smoking may indicate that there is a fault in the heating equipment. 10.4 Mould temperature The mould temperature shall be (60 5) C unless otherwise specified. 10.5 Moulding pressure The moulding pressure shall be 1
48、4 MPa. BS ISO 12689:2003 3 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-9:2003(E) 4 I SO 3002 All irhgts seredevr 10.6 Handling time The stack of preheated blanks shall be inserted exactly into the centre of the mould cavity and
49、the mould closed immediately. The mould stamp shall come into contact with the material (35 5) s after the end of the preheating time and no more than (5 1) s after placing the blanks in the mould. 10.7 Press closing speed The interval between the time the mould stamp comes into contact with the material and the time of maximum force shall be a maximum of 5 s. 10.8 Cooling