1、BRITISH STANDARDBS EN14900:2006Textile floor coverings Determination of the density of the textile fleece backingThe European Standard EN 14900:2006 has the status of a British StandardICS 59.080.60g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g5
2、9g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14900:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 48042 9National forewordThis British Standard is th
3、e official English language version of EN 14900:2006. The UK participation in its preparation was entrusted to Technical Committee PRI/3, Textile floor coverings, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-
4、referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of Brit
5、ish Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present
6、 to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside fr
7、ont cover, the EN title page, pages 2 to 7 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14900March 2006ICS 59.080.60English V
8、ersionTextile floor coverings - Determination of the density of thetextile fleece backingRevtements de sols textiles - Dtermination de la densitde la sous-couche textile aiguilleteTextile Bodenbelge - Bestimmung der Rohdichte destextilen VliesrckensThis European Standard was approved by CEN on 3 Feb
9、ruary 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obta
10、ined 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secret
11、ariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portuga
12、l, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT 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 reser
13、vedworldwide for CEN national Members.Ref. No. EN 14900:2006: EEN 14900:2006 (E) 2Contents PageForeword31 Scope 42 Normative references 43 Term and definition44 Principle45 Apparatus .46 Atmosphere for conditioning and testing .57 Test pieces .58 Procedure .59 Expression of results 510 Precision sta
14、tement.611 Test report 6Annex A (informative).7EN 14900:2006 (E) 3Foreword This document (EN 14900:2006) 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
15、a national standard, either by publication of an identical text or by endorsement, at the latest by September 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 fo
16、llowing countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
17、pain, Sweden, Switzerland and United Kingdom. EN 14900:2006 (E) 41 Scope This document specifies a method 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
18、backings.2 Normative references The following referenced documents are indispensable for the application 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,
19、 Textile floor coverings Determination of the apparent effective thickness of the backingEN ISO 139 Textiles - Standard atmospheres for conditioning and testing (ISO 139:2005) ISO 1765 Machine-made textile floor coverings Determination of thicknessISO 1957 Machine-made textile floor coverings Select
20、ion and cutting specimens for physical testsISO 8543:1998, Textile floor coverings Methods for determination 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
21、 The backing is shorn at a thickness equal to 50 % of the apparent effective thickness of the backing 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 devi
22、ce, as specified in EN 1318. 5.3 Sharp pointed knife. 5.4 Balance, calibrated and capable of measuring to the nearest 0.01 g5.5 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 straight
23、edge, as described in ISO 1765. EN 14900:2006 (E) 56 Atmosphere for conditioning and testing The 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
24、accordance with the directions in ISO 1957. 7.2 Number of specimens and dimensions Cut out at least 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 det
25、ermination shall be sufficient to give 95 % confidence limits of 7 %1)Four specimens shall be tested 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 Proc
26、edure 8.1 Measure the length and width, each in four places, on the back of each specimen to the 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 t
27、op so the backing remains after shearing. For carpets with a thick pile, first shear a part of the 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 8543:19
28、98 for the determination of the mass of the pile above the substrate. 8.4 Measure the thickness 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
29、 the method specified in ISO 1765, to the nearest 0,1 mm. 9.2 Calculate the mean mass of the shorn backing per unit area (QAb), to the nearest gram per square meter, using Equation 1: 1) Confidence limit = CVtnwhere t is the appropriate value for Students t-test n is the number of specimens tested E
30、N 14900:2006 (E) 66b10 mA(1) where mbis the mass of the shorn backing, in grams; A is the area 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 R
31、esults of two round robin tests are given in Annex A. 11 Test report The test report shall include 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 test
32、ing; d) individual test results and mean values for mass per unit area, in grams per square meter, 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. E
33、N 14900:2006 (E) 7Annex A (informative) Results of two round robins, performed in Autumn 2001, 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 Rou
34、nd robin 1 Lab I Lab II Lab III Average Sample AAverage 0,099 0,098 0,093 0,097 CV 6,4 % 5,5 % 5,5 % 3,4 % Sample BAverage 0,102 0,085 0,097 0,095 CV 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
35、,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 %BS EN 14900:2006BSI389 Chiswick High RoadLondon
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