《BS-ISO-1268-2-2001.pdf》由会员分享，可在线阅读，更多相关《BS-ISO-1268-2-2001.pdf（14页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 1268-2:2001 Fibre-reinforced plastics Methods of producing test plates Part 2: Contact and spray-up moulding ICS 83.120;83.140.10; NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00
2、2006, Uncontrolled Copy, (c) BSI BS ISO 1268-2:2001 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 July 2001 BSI 07-2001 ISBN 0 580 37743 1 N
3、ational foreword This British Standard reproduces verbatim ISO 1268-2;2001 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: A list
4、 of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internationa
5、l Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. 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
6、 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, or proposals for change, and keep the UK interests informed; monitor related international and E
7、uropean developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, ISO title page, pages ii to iv, pages 1 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments
8、issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 1268-2 First edition 2001-03-15 Reference number ISO 1268-2:2001(E) Fibre-reinforced plastics Methods of producing test
9、 plates Part 2: Contact and spray-up moulding Plastiques renforcs de fibres Mthodes de fabrication de plaques dessai Partie 2: Moulage au contact et par projection Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) ii License
10、d Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) diii ContentsPage 1Scope .1 2Normative references .1 3Health and safety 1 4Principle 1 5Materials .2 6Plate dimensions 2 7Reinforcement content .3 8Apparatus .3 9Procedure .4 10Veri
11、fication of the characteristics of the plate obtained 5 11Marking .5 12Test plate preparation report 5 Annex AEstimation of the number of reinforcement layers for various reinforcement materials.7 A.1Calculation method .7 A.2Product method .7 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08
12、:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) iv Foreword ISO (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 tech
13、nical 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 take part in the work. ISO collaborates closely
14、 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 3. Draft International Standards adopted by the technical committees are circulated to
15、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 possibility that some of the elements of this part of ISO 1268 may be the subject of patent rights. ISO shall not be held responsib
16、le for identifying any or all such patent rights. International Standard ISO 1268-2 was prepared by Technical Committee ISO/TC 61,Plastics, Subcommittee SC 13,Composites and reinforcement fibres. Together with the other parts (see below), this part of ISO 1268 cancels and replaces ISO 1268:1974, whi
17、ch has been technically revised. ISO 1268 consists of the following parts, under the general titleFibre-reinforced plastics Methods of producing test plates: Part 1: General conditions Part 2: Contact and spray-up moulding Part 3: Wet compression moulding Part 4: Moulding of prepregs Part 5: Filamen
18、t winding Part 6: Pultrusion moulding Part 7: Resin transfer moulding Part 8: Compression moulding of SMC and BMC Part 9: Moulding of GMT/STC The following additional parts are in preparation: Part 10: Injection moulding of SMC and BMC General principles and moulding of multipurpose test specimens P
19、art 11: Injection moulding of SMC and BMC Small plates Annex A of this part of ISO 1268 is for information only. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARDISO 1268-2:2001(E) d1 Fibre-reinforced plastics Methods of
20、 producing test plates Part 2: Contact and spray-up moulding 1Scope This part of ISO 1268 specifies methods for preparing reinforced plastics test plates either by contact moulding or by spray-up moulding. It applies exclusively to glass reinforcements. It is intended to be read in conjunction with
21、ISO 1268-1. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 1268. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to a
22、greements based on this part of ISO 1268 are encouraged to investigate the possi- bility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain register
23、s of currently valid International Standards. ISO 1172,Textile-glass-reinforced plastics Prepregs, moulding 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
24、 conditions. 3Health and safety See ISO 1268-1. 4Principle 4.1Contact moulding Reinforcement layers (as described in 5.1) are placed on a rigid flat plate and manually impregnated with liquid ther- mosetting resin. The resin is formulated in accordance with the manufacturers instructions to attain c
25、ure within a pe- riod of time that allows completion of the lay-up, yet limits unnecessary exposure to the atmosphere. The glass fibre and resin are consolidated by means of a hand-operated roller. This method is suitable for any thermosetting resin that cures at room temperature without the need fo
26、r additional pressure to be applied. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) 2 4.2Spray-up moulding Textile glass rovings are chopped to predetermined lengths in a cutter and simultaneously combined with a stream o
27、f tiny resin droplets emerging from a spray-gun nozzle. This method is normally used with unsaturated-polyester res- ins. Glass fibre and resin are dispersed on a rigid flat plate or a mould, and consolidated by means of a hand-operated roller. 5Materials 5.1Contact moulding 5.1.1Layers of reinforci
28、ng material, cut to the dimensions of the test plate, marking the warp and weft or pre- ferred direction when appropriate. Suitable materials include chopped-strand mats with a binder that is soluble in the resin mix, woven fabrics made from rovings or yarns, multiaxial non-woven fabrics, etc. 5.1.2
29、Thermosetting resin and curing agents, mixed in accordance with the suppliers instructions for room tem- perature curing. 5.1.3Release agent, to be applied to the mould or plate on which the test plate is to be made. 5.2Spray-up moulding 5.2.1Roving or yarn packages. 5.2.2Pre-activated thermosetting
30、 resin (use a resin specially recommended for spray-up moulding). 5.2.3Catalyst that is recommended for the resin used. 5.2.4Release agent. 6Plate dimensions 6.1General The length, width and thickness of the plate will depend upon the material being processed and the method used for processing. 6.2C
31、ontact moulding The recommended dimensions are. This size is sufficient to obtain test specimens for tensile and flexural tests along two perpendicular directions. The thickness shall be fromto. 6.3Spray-up moulding The recommended dimensions are. This size is sufficient to obtain test specimens for
32、 tensile and flexural tests along two perpendicular directions. The thickness shall not be greater than that which allows all air bubbles to be removed from the laminate by use of a roller (typicallyto). 600 mm600 mm 2 mm10 mm 600 mm600 mm 2 mm5 mm Licensed Copy: sheffieldun sheffieldun, na, Mon Nov
33、 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) d3 7Reinforcement content 7.1General The reinforcement content of the laminate produced will depend on the type of reinforcement used. The recom- mended percentage of reinforcement by mass for woven rovings is; for mats and c
34、hopped rovings it is . 7.2Contact moulding To achieve the thickness and reinforcement content desired, it may be necessary to conduct preliminary trials and measure these properties before the final technique for fabrication is determined. A guide to determining the number of layers of reinforcement
35、 to be used is given in annex A. 7.3Spray-up moulding To achieve the thickness and reinforcement content desired, it may be necessary to conduct preliminary trials and measure these properties before the final spraying technique is determined. Multiple sprayed layers are preferable to a single spray
36、 application and it is recommended that one layer of sprayed material has a thickness of about. 8Apparatus 8.1Contact moulding 8.1.1Scissors or knife, for cutting the reinforcement material. 8.1.2Balance, accurate to the nearest. 8.1.3Beakers, made of glass, plastic or uncoated paper (waxed paper is
37、 also suitable). 8.1.4Brushes. 8.1.5Mohair or steel rollers, with or without liner. 8.1.6Rigid flat plate, made of polished steel or any other non-porous material, with raised edges (to prevent resin run-off) made from material which is not affected by the resin used. 8.1.7Ventilated oven, with time
38、r and controls (if necessary). 8.1.8Desiccator (if necessary). 8.2Spray-up moulding The apparatus specified in 8.1, plus the following: 8.2.1Glass-chopper/spray-gun unit. 8.2.2Stopwatch. (503)% (324)% 1 mm 0,1 g Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontro
39、lled Copy, (c) BSI ISO 1268-2:2001(E) 4 9Procedure 9.1Contact moulding 9.1.1Prepare the test plate using the same parameters (number of layers, orientation, glass fibre content and type of resin) as would be used to produce the laminate being assessed. 9.1.2Coat the plate or mould on which the lamin
40、ate will be made with a layer of release agent, allow the layer to dry, and polish it if necessary. 9.1.3Cut layers of reinforcement to the dimensions necessary to give a surface area large enough to enable the specified number of test specimens to be obtained. Follow the manufacturers instructions
41、regarding conditioning of the reinforcement material. Dry the material, if nec- essary, before processing. 9.1.4Determine the total massof the conditioned reinforcement layers. 9.1.5Determine the amount of resinrequired to give the desired reinforcement content. The following equation may be used as
42、 a guide for this: where is the mass of glass fibre, in grams; is the mass of resin, in grams; is the glass fibre content desired in the laminate, expressed as a percentage of the total mass. NOTEAexcess of resin is included to compensate for losses due to resin spills along the edges, absorption by
43、 the rollers, etc. 9.1.6Condition the resin to the temperature of the laminating room before addition of the curing agents. Once the resin is fully mixed, begin laminating immediately. 9.1.7Apply a thin layer of resin and spread evenly over a surface area equivalent to the laminate dimensions. The a
44、mount of resin to be used will depend on the thickness of the individual reinforcement layers. Then carefully place the first layer of reinforcement on the resin film. Once the resin has wetted the reinforcement from beneath, remove any remaining air pockets by means of a roller. Next apply a furthe
45、r coat of resin and put a second layer of reinforcement material in place, impregnating it in the same way as described above. 9.1.8When all the layers have been applied, proceed to the curing of the plate (see 9.3). 9.2Spray-up moulding 9.2.1Insert the specified type of glass fibre roving into the
46、chopper and adjust the pressure between the cutter roller and anvil roller to give clean chopping without excessive friction. 9.2.2Fill the dispenser tanks of the equipment with the pre-activated resin and the catalyst. m1 m2 m2= m1 100 wg wg 1,2 m1 m2 wg 20 % Licensed Copy: sheffieldun sheffieldun,
47、 na, Mon Nov 27 08:12:21 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 1268-2:2001(E) d5 9.2.3Operate the chopper for exactly, then weigh the chopped fibres. Spray the resin for exactly, without using atomizing air, into a suitable receptacle (e.g. a paper cup) and weigh the resin in the receptacle
48、. Adjust the pressure on the chopper and the spray gun to give the desired ratio of resin and glass fibre in the output. 9.2.4Coat the plate or mould on which the laminate will be made with a layer of release agent, allow the layer to dry, and polish it if necessary. 9.2.5Apply regular layers of cho
49、pped fibres and resin, rolling after the application of each layer to remove excess air. 9.2.6When the required thickness has been reached, proceed to the curing of the plate (see 9.3). 9.3Curing conditions Unless other conditions are recommended by the resin manufacturer, use one of the following: either leave the plate on its plate-mould forat room temperature; or release the plate from the plate-mould after a maximum of, place it on a plane support in an oven set at and leave in the oven at this temperature for. These curing c