1、BRITISH STANDARD BS EN IS0 12115 : 1997 Fibre-reinforced plastics - Thermosetting moulding compounds and prepregs - Determination of flowability, maturation and shelf life The European Standard EN IS0 12115 : 1997 has the status of a British Standixd ICs 83.120 NO COPYING WITHOUT BSI PERMISSION EXCE
2、PT AS PERMITTED BY COPYRIGHT LAW I .* “ IL* *)I i * * “* * * BS EN IS0 12116 : 1997 AmdNo. This British Standard, having been prepared under the direction of the sedor Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 August 1997
3、Date Text affected National foreword This British Standard is the English language version of EN IS0 12115 : 1997. It is identical with IS0 12115 : 1997. The UK participation in its preparation was entrusted to lkchnical Committee PRU42, Fbre reinforced thennosethg plastics and prepregs, which has t
4、he responsibility to: - aid enquirem to understand the tea - present to the responsible intemationaM3uropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests infOrl-ned; - monitor rekited international and European developments and promulgate them in
5、the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding
6、or European publications. The British Stan- which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled International Stands Correspondence Index, or using the Find facility of the BSI Standards Electronic Catalogue. Compliance
7、with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 tide page the EN IS0 forword page, the IS0 title page, pages ii to iv, pages 1 to 11, a blank page, an inside back cover and a
8、back cover. Q BSI 1997 ISBN O 580 28028 4 STD.BSI BS EN IS0 12LL5-ENGL 1997 Lb24bb Ob3Y453 797 m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 12115 May 1997 ICs 83.120.00 Descriptors: see IS0 document English version Fibre-reinforced plastics - Thermosetting moulding compounds and prepre
9、gs - Determination of flowabiity, maturation and shelf life (IS0 12115:1997) Plastics renforcs de fibres - Conpasitions de moulage et primprgns - Dtermination de la fluidit, de la maturation et de la dure de vie (Is0 12115:1997) Faserverstrkte Kunststoffe - Hrtbare Formnassen und Prepregs - Eestimnn
10、g der Flieefhigkei t, Reifung und Gebrauchsdauer (IS0 12115:1997) * Ln * This European Standard was approved by CEN on 1997-05-10. CEN members are bound to caipiy with the CEN/CENELEC Internal Regulations uhich stipulate the conditions for giving this European Standard the status of a national stand
11、ard without any alteration. Up-to-date lists and bibliographicel references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other lan
12、guage 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 versions. CEN members are the national standards bodies of Austria, Belgiun, Czech Republic, Denmark, Finland, France, Germany, Greece,
13、 Iceland, Ireland, Italy, Luxenibourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Conmittee for Standardization Comit Europen de Nomlisation Europisches Komitee fr Nomg Central Secretariat: rue de Starsert,% 8-1050 Brussels 0 1997 CEN - All rights of explo
14、itation in any form and by any means reserved worldwide for CEM national Hebers. Ref. No. EN Is0 12115:1997 E EN IS0 12115 : 1997 Foreword The text of the International Standard IS0 12115:1997 has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN
15、/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1997, and conflicting national standards shall be withdrawn at the latest by N
16、ovember 1997. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands
17、, Norway, hrtugai, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 121 15: 1997 was approved by CEN as a European Standard without any modification. STD-BSI BS EN IS0 12115-ENGL 1997 Lb24bb9 Ob34455 51T EN IS0 12115 : 1997 INTERNATIONA
18、L STANDARD IS0 12115 First edition 1997-05- 1 5 Fibre-reinforced plastics - Thermosetting moulding compounds and prepregs - Determination of flowability, maturation and shelf life Plastiques renforcs de fibres - Compositions de moulage thermodurcissables et primprgns - Dtermination de la fluidit, de
19、 la maturation et de la dure de vie * * vi Reference number IS0 121 1 5: 1997( E) EN IS0 12115 : 1997 Contents Introduction . 1 2 3 4 5 6 7 8 9 10 11 12 Scope Normative references Definitions General Apparatus Sampling Conditioning . Test specimens . Procedure Expression of results . Precision Test
20、report . Page IV 1 1 2 2 3 4 5 5 5 6 7 8 Descriptors: plastics. reinforced plastics. thermosetting resins. moulding materials. ingredients. prepregs . tests. deteminaon . viscosty. maturation. life (durability). test equipment . i STD-BSI BS EN IS0 L21L5-ENGL 1997 LbZibb9 Ob3Li457 392 EN IS0 12115 :
21、 1997 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing Intemational Standards is normally carried out through IS0 technical Committees. Each member body interested in a subject for whic
22、h a technical committee has been established has the right to be represented on that committee. Intemational organizations, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all ma
23、tters of electrotechnical standardization. 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. International Standard IS0 121
24、 15 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres. iii EN IS0 12115 : 1997 Introduction The flowability of a moulding compound is a property which describes the ability of the compound to fill a mould cavity during the moulding opera
25、tion. The flowability varies with the age of the moulding compound due to the occurrence of a thickening process. This so-called maturation process is normally initiated by an additive, the aim being to prevent significant separation of the components of the moulding compound, and yet ensure suffici
26、ent flow for the moulding compound to be easy to handle and for it to spread out to fill the whole mould cavity when it is moulded. When the flowability of a moulding compound has developed to a defined limit, the compound is said to have reached its matured state. This means it can be handled and m
27、oulded satisfactorily under given operating conditions. The maturation and shelf life are determined from flowability measure- ments. The flowabili is measured at several different points in time ater production of the moulding compound, 2nd ?!IS shang? ir? flowability plotted as a function of time.
28、 The shelf life of the moulding compound is determined by assessing the ease of handling and moulding behaviour as given by the flowability. Experience indicates that in some cases shelf life may also be dependent on the cure characteristics of the moulding com- pound (see IS0 121 14). Maturation an
29、d shelf life are not parameters in their own right. For a particular moulding compound, the shelf life, for instance, may even differ from one set of moulding conditions to another and from one application to the next. iv - STD-BSI BS EN IS0 LZLL5-ENGL L997 Lb24bb Ob34q59 Lb5 EN IS0 12115 : 1997 Fib
30、re-reinforced plastics - Thermosetting moulding compounds and prepregs - Determination of flowability maturation and shelf life 1 Scope This International Standard specifies two methods for the determination of the flowability of fibre-reinforced thermosetting moulding compounds and prepregs. The me
31、thods apply to all fibre-reinforced thermosetting moulding compounds and differ in the test conditions and the apparatus required. The methods may be used to assess the influence of individual components of the moulding compound on the moulding behaviour by determining the flowability of the compoun
32、d. They are also suitable for quality control purposes, as well as the development of moulding compound formulations. The major field of application is with moulding compounds based on unsaturated polyester (UP) resins. Method I is a flowability test carried out at room temperature. Conducting the t
33、est at room temperature reduces the effect on the results of changes is the temperature of the moulding compound during the test. Method II is a flowability test carried out under commonly used moulding conditions. In addition, the plate produced may be used for further testing. - I = = - - - - e *
34、rn * 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on
35、 this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 472:1988, Plastics - Vocabulary. IS0 8605:1989, Textile glass re
36、inforced plastics - Sheet moulding compound (SMC) - Basis for a specification. IS0 8606:1990, Plastics - Prepregs - Bulk moulding compound (BMC) and dough moulding compound (DMC) - Basis for a specification. IS0 121 14:1997, Fibre-reinforced plastics - Thermosetting moulding compounds and prepregs -
37、 Determination of curing behaviour. 1 STD.BSI BS EN IS0 L2LLS-ENGL 1797 Lb2qbb7 Ob3qLibO 787 EN IS0 12115 : 1997 3 Definitions For the purposes of this International Standard, the terms and definitions given in IS0 472, IS0 8605 and IS0 8606 apply, plus the following definitions: 3.1 flowability: Th
38、e time-depending ability of a thermosetting moulding compound to flow and fill the cavity of a given mould under given conditions. 3.2 maturation: The process of thickening of thermosetting moulding compounds to a given level of flowability without significant separation of the components. 3.3 matur
39、ed state: The level of thickening at which the flowability of a thermosetting compound is such that it can be handled and moulded satisfactorily under given operating conditions. 3.4 shelf life: The period after production of a thermosetting compound during which the flowability remains at a level a
40、t which the compound can be moulded without the need to make significant changes in the moulding conditions from those normally used. 3.5 elementary unit: The smallest normally commercially available entity of a given product. The description (form, dimensions, mass, etc.) of the elementary unit wil
41、l normally be defined in the product specification. Elementary units may be supplied in the form of rolls or packages, for instance. NOTE - For a given product, the dimensions, mass or volume of the elementary unit may change, as manufacturing techniques evolve. without necessarily causing any modif
42、ication in the properties of the product or the way in which these properties vary within the elementary unit. 4.1 Methodl This method calls for an unconstrained test specimen to be subjected to a constant load by a punch. The specimen is caused to flow to the side, and the change in height of the p
43、unch as it sinks is measured (see figure i). Fibre-reinforced moulding compounds exhibit a change in flowability during a flow process, due to their non- Newtonian behaviour. Two values are therefore needed to express the flowability of a moulding compound, one value expressing the instantaneous flo
44、wability and the other the change in flowability due to the non-Newtonian behaviour of the compound. The vertical motion of the punch depends on the flowability of the moulding compound and on the applied load. A moulding compound is considered as being suitably tested if its flowability is such tha
45、t, after a load application period of 45 s, the punch has sunk to a level between 30 % and 70 % of the original thickness of the specimen. The test load is therefore selected to meet this condition. By carrying out the test at suitable intervals after production, the maturation thickening process ca
46、n be analysed, in particular the point at which this process levels out and the point at which the compound ceases to be mouldable without significant changes in the moulding conditions, the difference between these two points being the shelf life. NOTE - For unsaturated polyester resin, the depende
47、nce of this thickening on temperature is a non-linear one. Consequently, the results of tests at room temperature may not accurately reflect the performance of the material at the actual moulding conditions. 2 STD-BSI BS EN IS0 12115-ENGL 1777 lb24bb7 Ob344b1 AL3 EN IS0 12115 : 1997 4.2 Method II Th
48、is method calls for a test specimen to be moulded in a heated mould in a press under the normally used production conditions. The method is designed to determine the force necessary for the specimen to spread out and fill the mould within a certain time. A given mass of sheet moulding compound, cut
49、to the required size, or bulk moulding compound is placed in the centre of the mould cavity. The moulding compound is then caused to flow and is cured at the required pressure and temperature. The mould closing force is chosen such that filling of the cavity takes 1 O s f 5 s. It is important that the curing process has no effect on the flowability of the moulding compound during the time in which the compound is filling the mould. For fast-curing compounds, therefore, a filling time of 10 s may be too long, and a filling tim
