1、BRITISH STANDARD BS EN ISO 4612:1999 Plastics Preparation of PVC pastes for test purposes Planetary-mixer method The European Standard EN ISO4612:1999 has the status of a BritishStandard ICS 83.080.20BSENISO4612:1999 This BritishStandard, having been prepared under the directionof the Sector Committ
2、eefor Materials andChemicals, was publishedunder the authorityofthe Standards Committee and comes into effect on 15November1999 BSI 04-2000 ISBN 0 580 35383 4 National foreword This BritishStandard is the English language version of EN ISO4612:1999. It is identical with ISO4612:1999. The UK particip
3、ation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials, which has the responsibility to: 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
4、 UK interests informed; monitor related international and European developments and promulgate them in 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 in
5、clude an annex which lists normative references to international publications with their corresponding European publications. The BritishStandards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standa
6、rds 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 Standar
7、d does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN ISO title page,page2, the ISO title page, pagesii toiv, pages1 to6 anda back cover. This standard has been updated (see copyright date) an
8、d may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO4612:1999 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword 2 Foreword iii Text of ISO4612 1ii bla
9、nkEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO4612 August1999 ICS 83.080.00 English version Plastics Preparation of PVC pastes for test purposes Planetary-mixer method (ISO4612:1999) Plastiques Prparation des ptes PVC pouressais Mthodes utilisant un mlangeur plantaire (ISO4612:1999) Kuns
10、tstoffe Herstellung von PVC-Pasten frPrfzwecke Planetenmischerverfahren (ISO4612:1999) This European Standard was approved by CEN on23 July1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a
11、national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version i
12、n any other language 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, Belgium, CzechRepublic, Denmark, Finland, France, Ge
13、rmany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN
14、All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO4612:1999 EENISO4612:1999 BSI 04-2000 2 Foreword The text of the International Standard ISO4612:1999 has been prepared by Technical Committee ISO/TC61 “Plastics” in collaboration with
15、Technical Committee CEN/TC249 “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 February2000, and conflicting national standards shall be withdra
16、wn at the latest by February2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux
17、embourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnitedKingdom. Endorsement notice The text of the International Standard ISO4612:1999 was approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex
18、 ZA (normative).EN ISO4612:1999 ii BSI 04-2000 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Terms and definitions 1 4 Principle 1 5 Apparatus and materials 1 6 Resin sample and conditioning 2 7 Preparation of paste 4 7.1 Method A 4 7.2 Method B 4 8 Paste-preparation report 5 Annex
19、ZA (normative) Normative references to international publications with their relevant European publications 6 Figure 1 Planetary mixer 2 Figure 2 Configurations of typical planetary-mixer bowls and beaters 3EN ISO4612:1999 BSI 04-2000 iii Foreword ISO (the International Organization for Standardizat
20、ion) 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 has the right to be r
21、epresented 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. International Standards
22、 are drafted in accordance with the rules given in the ISO/IEC Directives, Part3. 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 least75% of the member bodies casting a
23、 vote. International Standard ISO4612 was prepared by Technical Committee ISO/TC61, Plastics, Subcommittee SC9, Thermoplastic materials. This second edition cancels and replaces the first edition (ISO4612:1979), which has been modified to make it suitable for the preparation of pastes of various com
24、positions and to include different types of planetary mixer.iv blankEN ISO4612:1999 BSI 04-2000 1 1 Scope This International Standard specifies two methods,A and B, for the preparation of pastes (alsoknown as plastisols) from appropriate PVC resins, plasticizers and other ingredients using a planeta
25、ry mixing process. Both method A and method B can be used to prepare pastes of any composition. Method A (single-speed) is particularly applicable to resins prone to heat build-up during paste preparation, while method B (two-speed) might be preferred for repetitive work, e.g.for process control dur
26、ing resin manufacture, because of its shorter mixing time. Such pastes may be used for a variety of test purposes, including the determination of rheological properties for resin designation and specification. 2 Normative reference The following normative document contains provisions which, through
27、reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments or revisions apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the n
28、ormative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing. 3 Terms and def
29、initions For the purposes of this International Standard, the following terms and definitions apply. 3.1 paste plastisol a homogeneous dispersion of PVC resin in an organic liquid 3.2 planetary mixer a mixer in which the beater or stirrer not only rotates about an axis within the mixing vessel, but
30、the axis of rotation itself also describes a circular path 4 Principle Liquid plasticizer, PVC resin powder and other appropriate ingredients, in liquid, paste or powder form, are combined in a mixer where the shearing action causes the powder(s) to disperse in the liquid(s). The paste-making proces
31、s involves the partial solvation of the resin powder by the plasticizer, and hence the “dispersion” will remain in liquid form for prolonged periods, i.e.the powder does not readily settle out. 5 Apparatus and materials 5.1 Planetary mixer, having at least the key features shown in Figure 1, and wit
32、h a mixing-bowl/beater configuration similar to one of those illustrated in Figure 2. The mixing bowl shall be made of stainless steel and may be fitted with a jacket for the circulation of cooling water. The bowl will have a recommended filling level, stated by the manufacturer. This shall allow th
33、e efficient mixing of700g to1200g of charge, made up of the relevant proportions of resin, plasticizer and any other ingredients. The motor specified shall have sufficient power to maintain the speed of rotation of the beater around the axis of the bowl at60min 1 5min 1and additionally, if method B
34、is used, at120min 1 10min 1with the most viscous paste that it is intended to mix. There will be a fixed relationship between the speed of rotation of the beater around the axis of the bowl and the speed of rotation of the beater around its own axis that will have been set by the manufacturer of the
35、 particular mixer. It shall approximate to the ratio3:7, i.e.when the speed of rotation of the beater around the axis of the bowl is set at60min 1 , the speed of rotation around its own axis will be approximately140min 1 . The mixer may be provided with a rotating wiper to scrape the inside of the b
36、owl with a blade made of a material that is resistant to the liquid(s) used to make the paste. The mixer may also have facilities for applying a vacuum to the contents of the bowl, both during and after mixing. 5.2 Controlled-atmosphere cabinet or room, capable of maintaining23 C 2 C and(50 5)% rela
37、tive humidity. 5.3 Balance, accurate to0,5g. 5.4 Timing device, which indicates seconds. 5.5 Beakers, of different capacities, for containing the test specimens of paste. The beakers shall be big enough to avoid paste overflowing during vacuum de-aeration of the paste. 5.6 Vacuum pump, desiccator, e
38、tc., to enable the de-aeration of pastes at a partial vacuum of about2 10 3 Pa. 5.7 Palette knifeEN ISO4612:1999 2 BSI 04-2000 5.8 Plasticizer 6 Resin sample and conditioning The resin used to make the paste shall be free from agglomerates and shall be conditioned at23 C 2 C and(50 5)% relative humi
39、dity, in accordance with ISO291, for24h prior to use. Figure 1 Planetary mixerEN ISO4612:1999 BSI 04-2000 3 Figure 2 Configurations of typical planetary-mixer bowls and beatersEN ISO4612:1999 4 BSI 04-2000 7 Preparation of paste 7.1 Method A Weigh100% of the calculated quantity of resin into the mix
40、er bowl followed by100% of the calculated quantity of plasticizer. The amount of plasticizer is determined both by the paste formulation and by the total quantity of resin, plasticizer and any other ingredients which is necessary to fill the mixer bowl to the level for “efficient” mixing (see5.1). A
41、ny other powder-form ingredients should preferably be added as part of the resin system, while other liquid ingredients should be included with the plasticizer. Depending on the amount involved, ingredients in paste form can be added with the powders or with the liquids. Using the palette knife, han
42、d-mix the plasticizer and resin until no free plasticizer can be seen. Scrape the knife clean with the mixer beater to ensure no material is lost. Locate the mixer bowl on the mixer frame, attach the beater to the shaft and raise the bowl or lower the mixer with its beater to the operating position.
43、 Start the timer and the mixer simultaneously, with the beater rotating at60min 1 5min 1around the axis of the bowl. After1min 10s, stop the mixer and timer, take out the bowl and use the palette knife to scrape down the sides of the bowl and the beater. Clean the knife on the beater, put the bowl b
44、ack and restart the mixer and timer. After a further5min 15s, repeat the scrape-down procedure described earlier and then continue mixing until the total actual mixing time reaches30min 30s. If the mixer is fitted with a rotating scraper for the bowl, it is not necessary to stop mixing in order to s
45、crape down the sides of the bowl, and mixing shall be allowed to continue uninterrupted for the full30min 30s. If, however, material is noticed adhering to the beater, use the procedure described for mixers having no rotating scraper. Stop the mixer and immediately check the temperature of the paste
46、. If the temperature is35 C, prepare a new paste either using more plasticizer or, if the mixer bowl is fitted with a cooling jacket, passing cooling water through the jacket. Transfer the paste to suitable beakers. If lumps are visible, prepare a new batch of paste. If not, de-aerate the paste unde
47、r a partial vacuum of about2 10 3 Pa and maintain this vacuum for about5min after the foam has been observed to collapse. If the mixer has the necessary facilities, the de-aeration procedure may be carried out in the mixer bowl. Cool and store the paste at23 C 2 C and(50 5)% relative humidity with t
48、he beaker covered to prevent accidental contamination. Take care throughout these procedures to avoid spillage and spattering. 7.2 Method B Weigh100% of the calculated quantity of resin into the mixer bowl followed by100% of the calculated quantity of plasticizer. The amount of plasticizer is determ
49、ined both by the paste formulation and by the total quantity of resin, plasticizer and any other ingredients which is necessary to fill the mixer bowl to the level for “efficient” mixing (see5.1). Any other powder-form ingredients should preferably be added as part of the resin system, while other liquid ingredients should be included with the plasticizer. Depending on the amount involved, ingredients in paste form can be added with the powders or with the liquids. Using the palette knife, hand-mix th
