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1、BRITISH STANDARD BS EN ISO 8619:1998 BS 2782-8: Method 835H: 1998 Plastics Phenolic resin powder Determination of flow distance on a heated glass plate The European Standard EN ISO 8619:1998 has the status of a British Standard ICS 83.080.10 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:
2、19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 8619:1998 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 August 1998 BSI 05-1999 ISBN 0 580 30
3、056 0 National foreword This British Standard is the English language version of EN ISO 8619:1998. It is identical with ISO 8619:1995. It supersedes BS EN ISO 8619:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics, which
4、 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 UK interests informed; monitor related international and European developments and promulgate them
5、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 include an annex which lists normative references to international publications with their correspondi
6、ng European publications. 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 “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standa
7、rds 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 Standard does not of itself confer immunity from legal obligations. Summary of page
8、s This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amen
9、dment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 8619:1998 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Foreword
10、ii 1Scope1 2Principle1 3Apparatus1 4Procedure1 5Expression of results1 6Precision2 7Test report2 Figure 1 Example of tilting device2 Figure 2 Diagrammatic representation of tablet production2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI i
11、i blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8619 June 1998 ICS 83.080.10Supersedes EN ISO 8619:1995 Descriptors: See ISO document English version Plastics Phenolic resin po
12、wder Determination of flow distance on a heated glass plate (ISO 8619:1995) Plastiques Rsines phnoliques en poudre Dtermination de lcoulement ltat fondu sur une plaque de verre chauffe (ISO 8619:1995) Kunststoffe Pulverfrmige Phenolharze Bestimmung der Fliestrecke auf einer vorgeheizten Glasplatte (
13、ISO 8619:1995) This European Standard was approved by CEN on 24 May 1998. 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 national standard without any alteration. Up-to-date lists and bibliogr
14、aphical 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 in any other language made by translation under the responsibility of a
15、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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa
16、y, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worl
17、dwide for CEN national Members. Ref. No. EN ISO 8619:1998 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8619:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 61 “Plastics” of the I
18、nternational Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. This European Standard replaces EN ISO 8619:1995. This European Standard shall be given the status of a national stan
19、dard, either by publication of an identical text or by endorsement, at the latest by December 1998, and conflicting national standards shall be withdrawn at the latest by December 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
20、 are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standar
21、d ISO 8619:1995 has been approved by CEN as a European Standard without any modification. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c)
22、BSI EN ISO 8619:1998 ii BSI 05-1999 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 technical committees. Each member body i
23、nterested 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 with the International Electrotechn
24、ical Commission (IEC) on all matters 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.
25、 International Standard ISO 8619 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. This second edition cancels and replaces the first edition (ISO 8619:1988) in which the alternative use of an unheated glass plate has been deleted and precision dat
26、a added. Descriptors: Plastics, resins, powdery materials, phenoplasts, tests, high temperature tests, determination, viscosity. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8619:1998 BSI 05-19991 1 Scope 1.1 This International Sta
27、ndard specifies a method for the determination of the flow distance of powdered heat-setting phenolic resins for production and control. With reference to tablet formation, test temperature and angle of inclination of the glass plate, measurement of the flow distance involves arbitrarily defined con
28、ditions. 1.2 The flow distance is dependent on the reactivity and melt viscosity of the resins. Rapid solidification and high melt viscosity shorten the flow distance. 2 Principle Tablets are first produced under defined conditions and are placed on a glass plate which has been heated to 125 C 1 C i
29、n a naturally ventilated oven. The plate is kept in the oven for a further 3 min in the horizontal position and then for 20 min in a tilted position. The flow distance is then measured. 3 Apparatus 3.1 Oven with natural ventilation, capable of being maintained at a temperature of 125 C 1 C. A spirit
30、 level is used to check its horizontal position. The temperature is measured in the immediate vicinity of the test tablets. 3.2 Cylindrical tablet press, for producing tablets 12,5 mm 0,3 mm in diameter and 4,8 mm 0,2 mm thick. 3.3 Balance, accurate to 1 mg. 3.4 Tilting device, made of metal, which
31、can be manipulated from outside the oven to position the glass plate (3.5) either horizontally or at an angle of 60 1(see Figure 1). 3.5 Glass plate, of a suitable size to fit in the oven, for example length 100 mm to 150 mm, width 60 mm to 120 mm, thickness 2,7 mm to 3 mm. The glass plate shall be
32、absolutely clean, smooth and without scratches. To make sure that the tablets have not become displaced during the experiment, a starting line may be drawn on the plate. NOTE 1The starting line is scored on the plate using a glass cutter. It has no influence on the result, and is simply used for pre
33、cise positioning of the tablets and for measuring the flow distance. 4 Procedure 4.1 In case of dispute, dry the sample until constant mass is obtained, for example by storing the powdered resin in a desiccator for at least 48 h over phosphorus pentoxide. NOTE 2The water content of the sample has a
34、marked influence on the flow distance. 4.2 Weigh, to the nearest 1 mg, 0,500 g of the powdered resin, and pour into the tablet press (3.2) see Figure 2 a). Close the press and compress the powder see Figure 2 b) either using a rubber hammer or a lever handle. Eject the tablet from the mould by remov
35、ing parts 3 and 4 see Figure 2 b) and by pushing the shaft of part 2 into part 1 see Figure 2 c). Make two tablets in this way. NOTE 3With resin powders having a high apparent density (those containing inorganic additives, for example), more than 0,500 g of powder may be taken in order to produce a
36、tablet with the required thickness (4,8 mm 0,2 mm). 4.3 Lay the glass plate (3.5) on the tilting device (3.4) in the horizontal position in the oven (3.1), maintained at a temperature of 125 C 1 C, and heat for at least 60 min. Open the door of the oven and, within 5 s and without removing the plate
37、 from the oven, lay the two tablets (see 4.2) flat on the glass, at least 1 cm apart and at least 1 cm away from the side edges and what will be the upper edge when the plate is tilted. Keep the glass plate with the tablets on it for 3 min 3 s in the horizontal position. Then tilt the device quickly
38、 but without jolting the plate, within a maximum of 5 s, to an angle of 60 1 (see Figure 1). 4.4 After 20 min in the inclined position, remove the glass plate from the oven and allow it to cool. Then measure for each tablet the flow distance, including tablet diameter, to the nearest 1 mm. Should a
39、tablet slip after the plate has been tilted to 60, measure the distance from the point where it started to flow, including tablet diameter. Calculate the arithmetic mean of the two distances. If the measurements differ by more than 5 %, repeat the test. 5 Expression of results Express the result as
40、the arithmetic mean of the two flow distances, in millimetres. Example: Flow distance = 43 mm When the measured distance is 12,5 mm (i.e. the diameter of the tablet) but the pellet has melted, the test result shall be reported as “melt and no flow”. Licensed Copy: sheffieldun sheffieldun, na, Mon No
41、v 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8619:1998 2 BSI 05-1999 6 Precision7 Test report The test report shall include the following particulars: a) a reference to this International Standard; b) all details necessary for complete identification of the sample tested; c) the i
42、ndividual test results and their arithmetic mean, as indicated in clause 5; d) a description of any slippage of the tablets. Figure 1 Example of tilting device Figure 2 Diagrammatic representation of tablet production Flow distance 20 mm: repeatability 10 % reproducibility 10 % Flow distance 20 mm:
43、repeatability 2 mm reproducibility 2 mm Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:19:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8619:1998 BS 2782-8: Method 83
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