1、 DEUTSCHE NORMJune 2006DIN EN 14900 ICS 59.080.60 Textile floor coverings Determination of the density of the textile fleece backing English version of DIN EN 14900:2006-06 Textile Bodenbelge Bestimmung der Rohdichte des textilen Vliesrckens Englische Fassung DIN EN 14900:2006-06 Document comprises
2、9 pages No part of this standard may be reproduced without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 7 www.din.de www.beuth.de !,o-Q“10.06 97610
3、46DIN EN 14900:2006-06 2 National foreword This standard has been prepared by CEN/TC 134 Resilient textile and laminate floor coverings (Secretariat: United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee
4、), Technical Committee NMP 534 Prfung und Verwendungs-bereichseinstufung textiler Bodenbelge. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14900March 2006ICS 59.080.60English VersionTextile floor coverings - Determination of the density of thetextile fleece backingRevtements de sols textiles -
5、Dtermination de la densitde la sous-couche textile aiguilleteTextile Bodenbelge - Bestimmung der Rohdichte destextilen VliesrckensThis European Standard was approved by CEN on 3 February 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
6、 giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official ver
7、sions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cy
8、prus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMI
9、T EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14900:2006: EEN 14900:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2
10、Normative references 4 3 Term and definition4 4 Principle4 5 Apparatus .4 6 Atmosphere for conditioning and testing .5 7 Test pieces .5 8 Procedure .5 9 Expression of results 5 10 Precision statement.6 11 Test report 6 Annex A (informative).7 EN 14900:2006 (E) 3 Foreword This document (EN 14900:2006
11、) has been prepared by Technical Committee CEN/TC 134 “Resilient textile and laminate 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 text or by endorsement, at the latest by Sep
12、tember 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republ
13、ic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14900:2006 (E) 4 1 Scope This document specifies a met
14、hod for determining the measured density of the fleece backing of textile floor coverings with an apparent effective thickness of the backing larger than 1 mm. This method is not applicable to foam backings. 2 Normative references The following referenced documents are indispensable for the applicat
15、ion of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1318, Textile floor coverings Determination of the apparent effective thickness of the backing EN ISO 139
16、Textiles - Standard atmospheres for conditioning and testing (ISO 139:2005) ISO 1765 Machine-made textile floor coverings Determination of thickness ISO 1957 Machine-made textile floor coverings Selection and cutting specimens for physical tests ISO 8543:1998, Textile floor coverings Methods for det
17、ermination of mass 3 Term and definition For the purposes of this document, the following term and definition applies. 3.1 measured density of the backing mass per unit volume of the backing 4 Principle The backing is shorn at a thickness equal to 50 % of the apparent effective thickness of the back
18、ing and the mass and thickness are determined on the shorn backing. The measured density is calculated from the values obtained. 5 Apparatus 5.1 Optical device, as specified in EN 1318. 5.2 Cutting device, as specified in EN 1318. 5.3 Sharp pointed knife. 5.4 Balance, calibrated and capable of measu
19、ring to the nearest 0.01 g 5.5 Rule, capable of measuring 300 mm. 5.6 Band-knife machine, press and cutter, as specified in ISO 8543:1998, Clause 8. 5.7 Thickness tester, circular guard ring and straightedge, as described in ISO 1765. EN 14900:2006 (E) 5 6 Atmosphere for conditioning and testing The
20、 specimens shall be conditioned and the test conducted in one of the standard atmospheres for conditioning and testing textiles specified in EN ISO 139. 7 Test pieces 7.1 Sampling Select the specimens in accordance with the directions in ISO 1957. 7.2 Number of specimens and dimensions Cut out at le
21、ast four specimens using a sharp pointed knife (5.2), each at least 200 mm x 200 mm with the sides parallel with, and at right angles to, the direction of manufacture. The number of specimens for each determination shall be sufficient to give 95 % confidence limits of 7 %1)Four specimens shall be te
22、sted initially and if the coefficient of variation (CV) calculated from these tests is 5 %, then further specimens shall be tested as follows: if 5 % 7 %, test a further six samples (total of ten). 8 Procedure 8.1 Measure the length and width, each in four places, on the back of each specimen to the
23、 nearest mm. 8.2 Shear the backing from the specimen at a depth equal to 50 % of the apparent effective thickness, in accordance with EN 1318, using a band-knife machine (5.6). Shear with the backing on top so the backing remains after shearing. For carpets with a thick pile, first shear a part of t
24、he pile to ensure good passing of the sample through the opening of the band-knife machine (5.6). 8.3 Determine the mass of the backing using the same method as described in 8.6.5 and 8.6.6 of ISO 8543:1998 for the determination of the mass of the pile above the substrate. 8.4 Measure the thickness
25、of the backing using the same method as described in ISO 1765 for the determination of the thickness of the carpet. 9 Expression of results 9.1 Calculate the mean thickness of the shorn backing (db) using the method specified in ISO 1765, to the nearest 0,1 mm. 9.2 Calculate the mean mass of the sho
26、rn backing per unit area (QAb), to the nearest gram per square meter, using Equation 1: 1) Confidence limit = CVtn where t is the appropriate value for Students t-test n is the number of specimens tested EN 14900:2006 (E) 6 6b10 mA(1) where mbis the mass of the shorn backing, in grams; A is the area
27、 of the specimen, in square millimeters. 9.3 Calculate the measured density of the backing under a pressure of 2,0 kPa, in grams per cubic centimeter, using Equation 2: 3 bb10AQd (2)10 Precision statement Results of two round robin tests are given in Annex A. 11 Test report The test report shall inc
28、lude the following information: a) reference to this European Standard; b) identity (source and type) of the sample from which the specimens were taken; c) standard atmosphere used for conditioning and testing; d) individual test results and mean values for mass per unit area, in grams per square me
29、ter, and thickness, in millimeters, of the backing; e) measured density under a pressure of 2,0 kPa, in grams per cubic centimeter; f) any deviation from the procedure specified in this European Standard. EN 14900:2006 (E) 7 Annex A (informative) Results of two round robins, performed in Autumn 2001
30、, for determination of the measured density, grams per cubic centimeter, of a needle felt secondary textile backing. During these round robins, analysis was performed on 7 specimens per sample. Table A.1 Round robin 1 Lab I Lab II Lab III Average Sample A Average 0,099 0,098 0,093 0,097CV 6,4 % 5,5
31、% 5,5 % 3,4 % Sample B Average 0,102 0,085 0,097 0,095CV 1,5 % 3,8 % 3,0 % 9,2 % Table A.2 Round robin 2 Lab I Lab II Lab III Lab IV Lab V Lab VI AverageSample C Average 0,102 0,073 0,086 0,088 0,101 0,098 0,091CV 1,4 % 7,0 % 1,9 % 2,5 % 2,2 % 4,8 % 12,0 %Sample D Average 0,114 0,123 0,107 0,095 0,117 0,117 0,112CV 2,4 % 4,7 % 2,6 % 1,9 % 1,7 % 3,8 % 8,9 %Sample E Average 0,107 0,095 0,086 0,093 0,105 0,108 0,099CV 2,3 % 4,4 % 3,9 % 1,0 % 1,3 % 3,3 % 9,2 %
