1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22636-7 SANS 1419:2009Edition 2.2SOUTH AFRICAN NATIONAL STANDARD Carpet underlays Published by SABS Standards Division 1 Dr Lategan Road G
4、roenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 1419:2009 Edition 2.2 Table of changes Change No. Date Scope Amdt 1 2008 Amended to change the designation of SABS standards to SANS standards, to update the introductory paragraph to the norm
5、ative references clause, to update the definition of “acceptable“, and to update referenced standards. Amdt 2 2009 Amended to update referenced standards. Foreword This South African standard was approved by National Committee SABS SC 219C, Textile floor coverings Carpet underlays, in accordance wit
6、h procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in April 2009. This document supersedes SANS 1419:2008 (edition 2.1). A vertical line in the margin shows where the text has been technically modified by amendment No. 2. Ann
7、ex A forms an integral part of this standard. Annexes B, C, D and E are for information only. SANS 1419:2009 Edition 2.2 1 Contents Page Foreword 1 Scope 3 2 Normative references 3 3 Definitions . 4 4 Requirements 4 5 Inspection and methods of test . 6 5.1 Inspection. 6 5.2 Preparation of test speci
8、mens . 6 5.3 Sample width 6 5.4 Thickness deviation 6 5.5 Thickness loss after prolonged, heavy static loading. 6 5.6 Thickness loss under dynamic loading. 6 5.7 Breaking strength and elongation. 6 5.8 Resistance to breaking or cracking (foam underlays only). 7 5.9 Compression after dynamic loading,
9、 work of compression after dynamic loading and retention of original work of compression 8 6 Packing, labelling and marking . 8 Annex A (normative) Notes to purchasers 10 Annex B (informative) Quality verification of carpet underlays 10 Annex C (informative) Note on surface fire index 10 Annex D (in
10、formative) Notes on location or area grading and the installation of textile floor coverings and carpet underlays 11 Annex E (informative) Bibliography. 12 SANS 1419:2009 Edition 2.2 2 This page is intentionally left blank SANS 1419:2009 Edition 2.2 3 Carpet underlays 1 Scope This standard specifies
11、 the basic requirements for carpet underlays, and also requirements for a grading system for location or areas. It does not cover specific characteristics, such as sound-insulation properties and resistance to fungal attack. 2 Normative references The following referenced documents are indispensable
12、 for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Information on currently valid national and international standards can be obtained from the SABS Sta
13、ndards Division. Amdt 1 BS 4098, Method for the determination of thickness, compression and recovery characteristics of textile floor coverings. ISO 1765, Machine-made textile floor coverings Determination of thickness loss under dynamic loading. Amdt 1 ISO 2094, Textile floor coverings Determinatio
14、n of thickness loss under dynamic loading. ISO 3416, Textile floor coverings Determination of thickness loss after prolonged, heavy static loading. SANS 70, Conditioning of textiles and standard temperate atmosphere for determining their physical and mechanical properties. SANS 81, Width of a textil
15、e fabric sample. SANS 82, Width of a textile fabric in a piece or roll. SANS 84, Length of fabric in a piece or roll. SANS 150/ISO 1765, Machine-made textile floor coverings Determination of thickness. SANS 10004, Terms and definitions for textiles and textile merchandise. SANS 13934-1/ISO 13934-1,
16、Textiles Tensile properties of fabrics Part 1: Determination of maximum force and elongation at maximum force using the strip method. Amdt 2 SANS 1419:2009 Edition 2.2 4 3 Definitions For the purposes of this standard, the definitions given in SANS 10004 and the following definitions apply: 3.1 acce
17、ptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant 3.2 compression loss in thickness of the carpet underlay when the thickness is measured under an initial pressure of 2 kPa and a final pressure of 100 kPa, and also under v
18、arious intermediary pressures 3.3 defect fault that reduces the ability of the carpet underlay to perform the function for which it was designed 3.4 foreign matter trash, metal wire and other matter likely to cause an injury or a blemish 3.5 location (area) grading index of suitability of a carpet u
19、nderlay to withstand different use-intensities in areas of practical use. The scale is 1 to 5, with the higher values requiring a carpet underlay to be capable of withstanding a higher degree of traffic. The criteria for determining the grading class are based on tests for compression after dynamic
20、loading, work of compression after dynamic loading and retention of original work of compression 4 Requirements 4.1 General A carpet underlay shall a) be made in accordance with sound manufacturing practice, b) be of the fibrous type or the foam type, as required (see annex A), c) be of acceptably u
21、niform make (i.e. substantially free from hard lumps and ridges), d) be free from foreign matter, e) be free from any obnoxious odour, f) be free from defects that affect its appearance or that can affect its serviceability (or both), g) have straight and evenly trimmed edges, and h) be delivered in
22、 a clean and commercially dry condition. SANS 1419:2009 Edition 2.2 5 4.2 Dimensions of rolls 4.2.1 Width The nominal overall width of a carpet underlay in a roll shall be as required (see annex A). The actual overall width determined in accordance with 5.1, shall be at least 98,5 % of the stated no
23、minal width (see 6.2.1(d). 4.2.2 Length The carpet underlay in a roll shall be in one continuous length, and, when determined in accordance with 5.1, the actual length in a roll shall be at least equal to the stated nominal length (see 6.2.1(e). 4.3 Basic requirements Carpet underlays shall comply w
24、ith the appropriate basic requirements given in table 1. Table 1 Basic requirements 1 2 3 Requirement Type Property Fibrous Foam Test method subclause Thickness deviation a) deviation of mean original thickness from the stated nominal thickness, %, max. 15 12 5.4 b) difference between maximum and mi
25、nimum original thickness, mm, max. 4 3 5.4 Thickness loss, %, max. a) after 24 h recovery following prolonged heavy, static loading . 40 15 5.5 b) after 1 000 cycles of dynamic loading 40 15 5.6 Breaking strength, N, min. 5.7 a) length direction 60 b) width direction . 60 Elongation at 30 N force, %
26、, max. 5.7 a) length direction 15 b) width direction . 15 Resistance to breaking or cracking (foam underlays only) .No cracks longer than 50 mm No cracks in any backing material 5.8 4.4 Location or area grading requirements The location or area grade of the carpet underlay shall be 1, 2, 3, 4 or 5,
27、as required (see annex A), and the underlay shall comply with the appropriate requirements given in table 2. SANS 1419:2009 Edition 2.2 6 Table 2 Requirements for location or area grading 1 2 3 4 5 6 7 Location or area gradeaProperty 1 2 3 4 5 Test method subclause Compression after dynamic loading,
28、 mm 4-7 4-7 4-7 2-4 2-4 5.9 Work of compression after dynamic loading, J/m250-75 75-120 120-200 50-75 75-200 5.9 Retention of original work of compression, %, min. 40 5.9 aSee table D.1 of annex D. 5 Inspection and methods of test 5.1 Inspection Visually examine and measure the carpet underlay in ea
29、ch roll of carpet underlay in the sample for compliance with the requirements of 4.1 and 4.2, using SANS 82 and SANS 84 to determine the width and length, respectively. 5.2 Preparation of test specimens After conditioning the test samples in accordance with SANS 70, cut from them the test specimens
30、required for the respective tests. 5.3 Sample width Use SANS 81 to determine the width of the test samples. 5.4 Thickness deviation Use the method given in SANS 150. Amdt 1 5.5 Thickness loss after prolonged, heavy static loading Use the method given in ISO 3416. 5.6 Thickness loss under dynamic loa
31、ding Use the method given in ISO 2094. 5.7 Breaking strength and elongation Use SANS 13934-1, but cut the specimens to a width of 100 mm and record the elongation at an applied force of 30 N unless prior breakage occurs. Amdt 2 SANS 1419:2009 Edition 2.2 7 5.8 Resistance to breaking or cracking (foa
32、m underlays only) 5.8.1 Apparatus 5.8.1.1 Rectangular, rigid metal plate, of dimensions at least 80 mm 40 mm. 5.8.1.2 Masspiece, such that the combined mass of the metal plate (see 5.8.1.1) and the masspiece is 2,5 kg. 5.8.1.3 Single-sided adhesive carpet tape, of width 50 mm. 5.8.2 Test specimen Cu
33、t a test specimen of dimensions at least 240 mm 120 mm. 5.8.3 Procedure 5.8.3.1 So fold the test specimen, as shown in figure 1, that the edges meet and the backing material, if any, is innermost. 5.8.3.2 Tape (see 5.8.1.3) the edges of the test specimen together and then turn the specimen over so t
34、hat the edges where the folds meet, are on the underside. 5.8.3.3 Place the metal plate (see 5.8.1.1) on the folded test specimen, as shown in figure 2. 5.8.3.4 Place the masspiece (see 5.8.1.2) on top of the metal plate and leave for 1 h. 5.8.3.5 Remove the masspiece and metal plate and immediately
35、 examine the folded specimen for signs of cracking and breaking. 5.8.4 Evaluation Report the number of cracks or breaks and their length and location relative to the position of the metal plate during loading. Dimensions in millimetres Figure 1 Arrangements of folds in test specimen for resistance t
36、o breaking or cracking test Figure 2 Location of metal plate on folded test specimen for resistance to breaking or cracking test SANS 1419:2009 Edition 2.2 8 5.9 Compression after dynamic loading, work of compression after dynamic loading and retention of original work of compression 5.9.1 Method Us
37、e the methods given in BS 4098 and ISO 2094, but calculate compression between 2 kPa and 100 kPa after dynamic loading. Determine the work of compression before and after dynamic loading in accordance with BS 4098, but use a presser foot of surface area between 700 mm2and 1 000 mm2and load the speci
38、men up to 100 kPa only. Calculate the work of compression between 2 kPa and 100 kPa before and after dynamic loading for 1 000 cycles in accordance with ISO 2094. Certain carpet thickness gauges might require modification. 5.9.2 Calculation 5.9.2.1 Work of compression Calculate the work of compressi
39、on either direct, by integrating the area under the loading curve between 2 kPa and 100 kPa by computer program, or by estimating the area from discrete thickness measurements. If the second method is used, take thickness measurements at pressures of 2 kPa, 5 kPa, 10 kPa, 20 kPa, 50 kPa and 100 kPa
40、and calculate the work of compression (in joules per square metre), using the following formula: Wc = (1,5t 2+ 4t 5+ 7,5t 10+ 20t 20+ 40t 50 73t 100) where t2is the thickness at 2 kPa pressure, in millimetres; t5is the thickness at 5 kPa pressure, in millimetres, etc. 5.9.2.2 Retention of original w
41、ork of compression Calculate the difference in percentage retention between the original work of compression and the work of compression after dynamic loading. 6 Packing, labelling and marking 6.1 Packing Carpet underlays shall be so packed as to protect them from damage during normal transportation
42、 and storage. 6.2 Labelling and marking 6.2.1 Rolls The following information shall appear in legible and indelible marking on a label securely attached to the inner end of each roll of carpet underlay: a) the manufacturers name or trade mark (or both); b) the type of underlay (i.e. fibrous or foam)
43、; SANS 1419:2009 Edition 2.2 9 c) the location or area grade and designation, as appropriate; d) the nominal width, in centimetres; e) the nominal length, in metres; and f) the nominal thickness, in millimetres. 6.2.2 Additional marking When so required, rolls shall bear information additional to th
44、at specified in 6.2.1. SANS 1419:2009 Edition 2.2 10 Annex A (normative) Notes to purchasers The following requirements shall be specified in tender invitations and in each order or contract: a) the type (see 4.1(b); b) the nominal width (see 4.2.1), length (see 4.2.2) and thickness; c) the location
45、 or area grade (see 4.4); and d) additional marking, if required (see 6.2.2). Annex B (informative) Quality verification of carpet underlays When a purchaser requires ongoing verification of the quality of carpet underlays it is suggested that, instead of concentrating solely on evaluation of the fi
46、nal product, he also direct his attention to the manufacturers quality system. In this regard it should be noted that SANS 9001 covers the provision of an integrated quality system. Amdt 1 Annex C (informative) Note on surface fire index When the surface fire index of a textile floor covering is req
47、uired for a specific installation, it is necessary to test the carpet underlay together with the textile floor covering to be used in that installation. Use the method given in SANS 10177-4 for that purpose. SANS 1419:2009 Edition 2.2 11 Annex D (informative) Notes on location or area grading and th
48、e installation of textile floor coverings and carpet underlays D.1 The essential purpose of this grading scheme is to present the intending purchaser with a simple, meaningful and non-technical means of identifying the location or area suitability of any carpet underlay, irrespective of the construc
49、tion and composition of the carpet underlay. The product is clearly marked from 1 to 5 into an ascending, numerical scale representing the order of expected performance. It should be noted that a carpet underlay of grade 3 is very thick and luxurious and designed for high energy absorption. Grade 4 and 5 carpet underlays are designed for commercial performance and are not as thick and luxurious as grade 3 carpet underlays. In cases where a very thick and luxurious carpet underlay is required for a location or area of grade 4 or 5 in, for example, a hotel
