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 978-0-626-23117-0 SANS 770:2009Edition 2.3SOUTH AFRICAN NATIONAL STANDARD Footwear laces Published by SABS Standards Division 1 Dr Lategan Road Groe
4、nkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 770:2009 Edition 2.3 Table of changes Change No. Date Scope Amdt 1 1999 Amended to replace references to SABS methods, which have been withdrawn and superseded, with references to SABS ISO methods
5、. The SABS ISO methods cover colourfastness and quantitative textile fibre analysis. Amdt 2 2008 Amended to change the designation of SABS standards to SANS standards, and to update the definition of “acceptable”. Amdt 3 2009 Amended to update referenced standards. Foreword This South African standa
6、rd was approved by National Committee SABS SC 1084F, Textile products Narrow fabrics, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in June 2009. This document supersedes SANS 770:2008 (edition 2.2). A v
7、ertical line in the margin shows where the text has been technically modified by amendment No. 3. SANS 770:2009 Edition 2.3 1 Contents Page Foreword 1 Scope . 3 2 Definitions 3 3 Requirements . 3 4 Packing and marking . 5 5 Sampling and compliance with the specification . 6 6 Inspection and methods
8、of test 7 6.1 Inspection 7 6.2 Allocation of test samples . 7 6.3 Length . 8 6.4 Number of threads and number of carriers . 8 6.5 Plaits per centimetre . 8 6.6 Number of ends in full width 8 6.7 Number of picks per 10 cm . 8 6.8 Composition 8 6.9 Mass per 100 m 8 6.10 Breaking strength . 8 6.11 Grip
9、ping strength of tags 8 6.12 Colour fastness to water 8 6.13 Slip resistance . 8 6.14 Colour fastness to light. 9 6.15 Abrasion resistance . 9 Appendix A Applicable standards . 10 Appendix B Notes to purchasers 11 SANS 770:2009 Edition 2.3 2 This page is intentionally left blank SANS 770:2009 Editio
10、n 2.3 3 Footwear laces 1 Scope This standard covers four types of braided tubular lace and one type of woven lace made in all cases from nylon or polyester yarns. NOTE a) The standards referred to in this specification are listed in appendix A. b) Requirements that must be specified by the purchaser
11、 are listed in appendix B. 2 Definitions 2.1 For the purposes of this specification, the definitions given in SANS 10004 and the following definitions apply: acceptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 2 def
12、ective test sample, test specimen, or a set of test specimens whose average property has been determined, that fails in one or more respects to comply with the relevant requirements of the specification lot not less than 100 and not more than 150 000 pairs of laces (packed or bundled in groups of 10
13、0 or 500 pairs) of the same type, length, colour, and finish of lace ends, made by one manufacturer under essentially the same conditions, and submitted at any one time for inspection and testing 3 Requirements 3.1 General The laces shall be of uniform make, colour, and finish, and shall be free fro
14、m defects that impair their appearance or might impair their serviceability. They shall be delivered in a clean and commercially dry condition and shall not be inferior in quality or appearance to the corresponding standard sample of SANS 770. NOTE If a standard sample differs in any respect from th
15、e specified particulars, the provisions of the specification shall apply. SANS 770:2009 Edition 2.3 4 3.2 Type The laces shall be of one of the types listed in column 1 of table 1, as specified by the purchaser. 3.3 Construction 3.3.1 Types L1, L2, L5, and L6 Types L1, L2, L5, and L6 shall be braide
16、d laces without cores and of uniform cross-section. 3.3.2 Type L7 Type L7 shall be woven laces with a 2/2 twill weave. The selvedges shall be straight, firm, and evenly formed, and in the case of laces woven on a shuttleless loom, the weft yarns shall be so interlocked, at or near the selvedge, by m
17、eans of a locking thread, that unravelling of the selvedge during use is prevented. The method of interlacing of the locking thread with the weft yarns shall be such that a) the locking thread cannot be pulled out of the body of the lace, and b) in the event of a breakdown of the locking thread, con
18、tinuous unravelling of the selvedge will not occur. 3.4 Lace ends Each end of a lace shall be finished by the attachment of a tag of suitable plastics material or by adequate fusing, as specified by the purchaser. Tags shall have a length of at least 11 mm and a gripping strength, determined in acco
19、rdance with 6.11, of at least 65 N. 3.5 Length When measured in accordance with 6.3, the finished length of the laces, including (when relevant) the tags, shall be as specified by the purchaser, subject to the appropriate tolerance given in SANS 977. 3.6 Colour The colour of the laces and, when rele
20、vant, of the tags, shall be an acceptable match to that specified by the purchaser. 3.7 Constructional and physical properties When tested in accordance with the appropriate tests given in 6.4 to 6.10 (inclusive), the laces shall comply with the relevant requirements given in columns 2 to 9 (inclusi
21、ve) of table 1. SANS 770:2009 Edition 2.3 5 Table 1 Constructional and physical properties 1 2 3 4 5 6 7 8 9 10 Fibre composition%, min. Number of carriers Total number of threads Number of plaits per cm Number of ends in full widthNumber of picks per 10 cmBreaking strength Mass per 100 m Abrasion r
22、esistance, number of cycles Type* Polyester or nylon min. min. min. min. min. N, min. g, min. min. L1 100 24 72 9 530 340 200 000 L2 100 40 48 14 360 235 200 000 L5 100 8 8 6 220 235 100 000 L6 100 32 48 24 270 150 120 000 L7 100 60 95 650 280 200 000 * Designation by these numbers is restricted to
23、laces that comply with the above requirements. 3.8 Abrasion resistance The resistance to abrasion of the laces, when tested in accordance with 6.15, shall be such that no test specimen breaks within the appropriate number of cycles specified in column 10 of table 1. 3.9 Colour fastness to water When
24、 a specimen is tested in accordance with 6.12, any staining of the water shall not exceed 5 on the geometric grey scale for assessing staining. 3.10 Colour fastness to light The light fastness rating of a lace, determined in accordance with 6.14, shall be not lower than 4. 3.11 Slip resistance The s
25、lip resistance of a lace, determined in accordance with 6.13, shall be at least 11 N. 4 Packing and marking 4.1 Packing The laces shall be suitably fastened together in pairs and then packed or bundled in groups of 100 or 500 pairs. Only laces of the same type, length, and colour, and having the sam
26、e type of lace end, shall be packed together in the same package or bundle. The packages or bundles shall be packed in bulk containers that are capable of protecting the contents from damage during normal transportation and handling. 4.2 Marking 4.2.1 Bundles and packages The following information s
27、hall appear in legible and indelible marking on a label securely attached to each package or bundle of laces: a) the manufacturers name or trademark, or both; SANS 770:2009 Edition 2.3 6 b) the type and colour; c) the length; d) the type of lace end, i.e. tagged or fused; and e) the quantity (in ter
28、ms of 100 pairs). 4.2.2 Bulk containers The following information shall appear in legible and indelible marking on the outside of each bulk container: a) the manufacturers name or trademark, or both; b) the type(s); c) the colour(s); d) the length(s); and e) the quantity (in terms of 100 pairs) of e
29、ach type, colour, and length. 4.2.3 Additional marking When so specified by the purchaser, packages/bundles or bulk containers or both shall bear information additional to that specified in 4.2.1 and 4.2.2. 5 Sampling and compliance with the specification NOTE This section applies to the sampling fo
30、r inspection and testing before acceptance or rejection of single lots (consignments) in cases where no information about the implementation of quality control or testing during manufacture is available to help in assessing the quality of the lot. 5.1 Sampling The following sampling procedure shall
31、be applied (after checking for compliance with the requirements of section 4), in determining whether a lot complies with the relevant requirements of the specification. The samples so taken shall be deemed to represent the lot for the respective properties. 5.1.1 Sample for inspection From the lot
32、take at random the number of pairs of laces given in column 2 of table 2 relative to the appropriate lot size given in column 1. SANS 770:2009 Edition 2.3 7 Table 2 Sample sizes 1 2 3 4 Sample for inspection Lot size, 100 pairs of laces Sample, pairs of laces Acceptance number Sample for testing, pa
33、irs of laces 1 10 1 5 2-3 15 2 10 4-5 25 3 15 6-12 40 5 25 13-32 60 7 40 33-100 100 10 60 101-350 150 14 90 360-1500 250 21 150 5.1.2 Sample for testing From the lot or, after inspection (see 6.1), from the sample drawn in accordance with 5.1.1, take at random the appropriate number of pairs of lace
34、s given in column 4 of table 2. 5.2 Compliance with the specification The lot shall be deemed to comply with the specification if a) on inspection of the sample drawn in accordance with 5.1.1, the number of defectives found does not exceed the relevant acceptance number given in column 3 of table 2;
35、 and b) on testing of the sample drawn in accordance with 5.1.2, no defective is found. 6 Inspection and methods of test 6.1 Inspection Examine each lace taken in accordance with 5.1.1 for compliance with the requirements of 3.1, 3.3, 3.4 (other than for gripping strength of tags), and 3.6. 6.2 Allo
36、cation of test samples Condition, as described in SANS 70, the laces in the sample taken in accordance with 5.1.2 and determine the length of each lace in accordance with 6.3. Then divide the laces into five sets, each containing an equal number of laces, and no set containing both laces of a pair.
37、Use a different set for each of the following groups of tests: a) Group A. 6.4 and 6.5, or 6.6 and 6.7 (as relevant), 6.8; b) Group B. 6.9, 6.10; c) Group C. 6.11 (when relevant), 6.12; SANS 770:2009 Edition 2.3 8 d) Group D. 6.13, 6.14; and e) Group E. 6.15. 6.3 Length Use SANS 5311. In the case of
38、 laces with fused ends, make a datum mark at a measured distance of 10 mm to 13 mm from each end of the lace under test, secure the ends of the lace in the clamps up to the datum marks, and add the sum of the lengths of the marked ends to the distance between the clamps. 6.4 Number of threads and nu
39、mber of carriers Use the apparatus and procedure given in SANS 5312. 6.5 Plaits per centimetre Use the apparatus and procedure given in the SANS 5314. 6.6 Number of ends in full width Use SANS 86. 6.7 Number of picks per 10 cm Use SANS 86. 6.8 Composition Determine by microscopical examination and c
40、hemical analysis. 6.9 Mass per 100 m Use SANS 5313, but use all the laces in the appropriate group, and measure the length of laces with fused ends as in 6.3. 6.10 Breaking strength Use SANS 13934-1, but use specimens of the full width of the lace. Amdt 3 6.11 Gripping strength of tags Use SANS 5420
41、, but use all the laces in the appropriate group. 6.12 Colour fastness to water Use SANS 5315. 6.13 Slip resistance Use SANS 5421. SANS 770:2009 Edition 2.3 9 6.14 Colour fastness to light Use SANS 105-B02. Amdt 1 6.15 Abrasion resistance Use SANS 5316, but record each individual result. SANS 770:20
42、09 Edition 2.3 10 Appendix A Application standards Reference is made to the latest issues of the following standards: SANS 70, Conditioning of textiles and standard temperate atmosphere for determining their physical and mechanical properties. SANS 86, Threads per unit length in woven textile fabric
43、s (other than narrow fabrics, and having more than 10 threads per cm): counting-glass method. SANS 105-B02/ISO 105-B02, Textiles Tests for colour fastness Part B02: Colour fastness to artificial light: Xenon arc fading lamp test. Amdt 1 SANS 977, Textile tolerances. SANS 5311, Length of textile shoe
44、 laces. SANS 5312, Number of interlacing threads in a braid. SANS 5313, Mass per 100 m of textile shoe laces. SANS 5314, Plaits per centimetre in a textile braid. SANS 5315, Colour-bleeding (in water) of textile shoe laces. SANS 5316, Abrasion resistance of textile shoe laces (without core) and simi
45、lar articles. SANS 5420, Gripping strength of tags on textile shoe laces. SANS 5421, Slip resistance of textile shoe laces and similar articles. SANS 10004, Terms and definitions for textiles and textile merchandise. SANS 13934-1/ISO 13934-1, Textiles Tensile properties of fabrics Part 1: Determinat
46、ion of maximum force and elongation at maximum force using the strip method. Amdt 3 SANS 770:2009 Edition 2.3 11 Appendix B Notes to purchasers The following requirements shall be specified in tender invitations and in each order or contract: a) the type (see 3.2); b) the finish of lace ends (see 3.
47、4); c) the length (see 3.5); d) the colour (see 3.6); and e) additional marking, if required (see 4.2.3). SABS This page has been left blank intentionally SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This o
48、bjective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. The SABS continuously
49、strives to improve the quality of its products and services and would therefore be grateful if anyone finding an inaccuracy or ambiguity while using this standard would inform the secretary of the technical committee responsible, the identity of which can be found in the foreword. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 The SABS offers an individual notification service, which ensures that subscribers automatically receive notification regarding amendments and revisions to South African National Standards. Tel: +27 (0) 12 428 6883 Fax: +
