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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 670 : 1998 The Euro
2、pean Standard EN 670 : 1997 has the status of a British Standard ICS 97.150 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Resilient floor coverings Identification of linoleum and determination of cement content and ash residue Licensed Copy: sheffieldun sheffieldun, na, Mon
3、Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 January 1998 BSI 1998 ISBN 0 580 28831 5 BS
4、 EN 670 : 1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 670 : 1997 published by the European Committee for Standardization (CEN). The UK participation in its preparation was entrusted to Technical Comm
5、ittee PRI/60,Resilientfloorcoverings,whichhastheresponsibilityto: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developme
6、nts and promulgate them in the UK. A list 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
7、 under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an
8、inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu
9、 r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 670 : 1997 E EUROPEAN STANDARDEN 670 NORME EUROPE ENNE EUROPA ISCHE NORM September 1997 ICS 97.150 Descriptors
10、: Floor coverings, linoleum, identification, composition, ash content, binder English version Resilient floor coverings Identification of linoleum and determination of cement content and ash residue Reve tements de sol re silients Identification du linole um et de termination de la teneur en ciment
11、et du taux de cendres Elastische Bodenbela ge Erkennung von Linoleum und Bestimmung des Gehaltes an Bindemittel und anorganischen Fu llstoffen This European Standard was approved by CEN on 1997-08-03. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
12、tions for giving this European Standard the status of a 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
13、official versions (English, French, German). A version in 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 Austr
14、ia, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2
15、 EN 670 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 134, Resilient and textile floor coverings, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical
16、text or by endorsement, at the latest by March 1998, and conflicting national standards shall be withdrawn at the latest by March 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Au
17、stria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
18、 Page 3 EN 670 : 1997 BSI 1998 1 Scope This European Standard specifies methods for identifying linoleum and determining the cement content and inorganic filler (ash residue) in linoleum floor coverings. 2 Definitions For the purposes of this European Standard, the following definitions apply. 2.1 a
19、sh content The residue that remains following incineration at 500 C for 3 h. 2.2 linoleum cement Binder in linoleum, consisting of a mixture of linseed oil and/or other vegetable drying oils, rosin and drying oil catalysts, which is converted to a semi-elastic mass by an oxidative curing process. 3
20、Principles 3.1 Identification A small test piece is saponified in a solution of potassium hydroxide in methanol to identify linoleum from other floor coverings. 3.2 Composition 3.2.1 Cement content The surface layer of a test piece without the backing material is crumbled and mixed with a solution o
21、f potassium hydroxide in methanol. After intensive stirring at 20 C to 25 C the mixture is filtered and the residue is carefully dried. The difference between the initial mass and the mass of the residue is the defined mass of linoleum cement. 3.2.2 Inorganic filler (ash residue) To determine the am
22、ount of inorganic filler, the surface layer of a test piece without the backing material is incinerated and the mass of the residual ash is measured. 4 Apparatus and materials 4.1 Apparatus 4.1.1 Grater. 4.1.2 General laboratory apparatus, e.g. beakers. 4.1.3 Porcelain crucibles. 4.1.4 Desiccator (v
23、acuum type), containing a suitable desiccant, e.g. silica gel. 4.1.5 Furnace, capable of being controlled at 500 C10 C. 4.1.6 Balance, having an accuracy of 0,1 mg. 4.1.7 Laboratory sieve, with a nominal aperture size of 0,5 mm. 4.1.8 Ultrasonic bath, or equivalent device. 4.1.9 Centrifuge or vacuum
24、 filter (filter type A2) and suction device, e.g. a water jet pump. 4.2 Reagents 4.2.1 Methanol (methyl alcohol), analytical grade. 4.2.2 Potassium hydroxide, analytical grade in methanol solution with a concentration of 0,5 mol/1. 5 Sampling and preparation of specimens 5.1 Sampling Take a represen
25、tative sample from the available material. 5.2 Preparation of specimens Take five specimens, each of minimum area 50 cm2, from across the width of sample, or from individual tiles, the distance between the edge of the sample and the nearest edge of the test piece being at least 100 mm. 5.2.1 Identif
26、ication testing Cut a square of approximately 20 mm 3 20 mm from a specimen. 5.2.2 Saponification testing Grate the surface layer of the specimen, ensuring that the backing material is separated. Use that part which passes a 0,5 mm sieve for the saponification testing. 5.2.3 Ashing Cut the surface l
27、ayer of the specimen into small pieces of approximately 5 mm 3 5 mm, ensuring that the backing material is separated. 6 Conditioning Condition the prepared specimens at a temperature of (232) C and relative humidity (505) % for a minimum of 24 h. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 1
28、3 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 670 : 1997 BSI 1998 7 Procedure 7.1 Identification Saponify the test piece in excess potassium hydroxide/methanol solution without stirring. After 24 h, record whether complete disintegration of the linoleum has taken place. If disinteg
29、ration has not taken place, the sample is not identified as linoleum, so discontinue the test. 7.2 Composition 7.2.1 Determination of cement content Weigh approximately 1 g of the grated test piece, with particle size # 0,5 mm, in a tared beaker. Add approximately 10 ml of the potassium hydroxide/me
30、thanol solution and stir for 10 min30 s. Ensure that the temperature does not exceed 25 C, because wood- and/or cork-flour may be affected. Centrifuge or vacuum filter the mixture using filter type A2 and rinse the residue at a temperature of 40 C. Condition the dry residue (see clause 6) for a mini
31、mum of 24 h and record its mass. 7.2.2 Determination of inorganic filler (ash content) Determine the tared mass of a porcelain crucible as follows. Prepare a crucible by heating in the furnace at 500 C for at least 3 h. Allow to cool in the desiccator for at least 1 h and determine the mass of the c
32、rucible. Repeat the process of heating, cooling and weighing until the results of two consecutive weighings of the mass do not differ from each other by more than 0,5 mg, i.e. the mass is virtually constant. Weigh approximately 2 g of the crumbled specimen in the tared porcelain crucible. Heat the c
33、rucible using a Bunsen burner so that the specimen burns in a controlled manner. Place the crucible and contents in a furnace at 500 C10 C for at least 3 h to allow incineration to proceed to completion, i.e. when no carbonaceous matter remains in the crucible. Transfer the crucible and contents to
34、the desiccator and allow to cool for at least 1 h. Determine the mass of the crucible and residue. Repeat the process of incineration, cooling and weighing until the results of two consecutive weighings do not differ from each other by more than 0,5 mg, i.e. the mass is virtually constant. 8 Calcula
35、tion and expression of results 8.1 Calculation 8.1.1 Saponification Calculate the linoleum cement content as a percentage by mass using the following expression: 3 100(1) m12 m2 m1 where m1is the initial mass of the test piece (in g); m2is the mass of the dry residue (in g). 8.1.2 Ash residue Calcul
36、ate the content of inorganic filler as a percentage by mass, using the following expression: 3 100(2) m3 m1 where m1is the initial mass of the test piece (in g); m3is the mass of the ash residue (in g). 8.2 Expression of results 8.2.1 Identification Record whether complete disintegration takes place
37、. 8.2.2 Composition Express the results for linoleum cement content and inorganic filler (ash residue) as the averages of the number of test pieces used and record these to the nearest 0,5 %. 9 Test report The test report shall contain the following information: a) reference to this standard, i.e. E
38、N 670; b) a complete identification of the product tested, including type, source, manufacturers reference numbers; c) previous history of the sample; d) a statement that the sample has been identified as linoleum; e) the average cement content and the average inorganic filler content, if relevant;
39、f) any deviation from this standard which may have affected the results. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 17:27:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389
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