1、 ISO 2015 Textiles Synthetic filament yarns Determination of shrinkage in dry-hot air (after treatment) Textiles - Fils de filaments synthtiques - Dtermination du taux de retrait dans lair sec et chaud INTERNATIONAL STANDARD ISO 18067 First edition 2015-05-15 Reference number ISO 18067:2015(E) ISO 1
2、8067:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopyi
3、ng, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749
4、01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org ISO 18067:2015(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 Terms and definition 1 4 Principle 1 5 Apparatus and materials 1 6 Sampling and preparation of the test specimen 2 6.1 Sampling . 2 6.2 Preconditioning and conditioning 3 6.3 P
5、reparation of the test specimen 3 6.3.1 Skein method 3 6.3.2 Single-end method . 4 6.4 Number of specimens . 4 7 Testing conditions . 4 7.1 Dry-hot air treatment conditions 4 7.2 Tension for the test specimen 4 7.3 Equilibrium time for test specimen after thermal treatment . 5 8 Testing procedure .
6、5 8.1 Skein method A (Manual measurement) 5 8.1.1 Measuring the initial length of the test specimens 5 8.1.2 Thermal treatment of the test specimens 5 8.1.3 Equilibrium after thermal treatment . 5 8.1.4 Measuring the length of the test specimens after treatment. 6 8.2 Skein method B (Automatic measu
7、rement) 6 8.2.1 Measuring the initial length of the test specimens 6 8.2.2 Thermal treatment of the test specimens 6 8.2.3 Equilibrium after thermal treatment . 6 8.2.4 Measuring the length of the test specimens after treatment. 6 8.3 Single-end method . 6 8.3.1 Measuring the initial length of the t
8、est specimens 6 8.3.2 Thermal treatment of the test specimens 6 8.3.3 Equilibrium after thermal treatment . 6 8.3.4 Measuring the length of the test specimens after treatment. 7 9 Calculation and expression of results . 7 9.1 Calculation 7 9.2 Precision . 7 10 Test report . 7 Annex A (informative) P
9、recision experiments . 8 Bibliography 9 ISO 2015 All rights reserved iii Contents Page ISO 18067:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
10、ally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in t
11、he work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular th
12、e different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this docu
13、ment may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.or
14、g/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO
15、principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information. The committee responsible for this document is ISO/TC 38, Textiles , Subcommittee SC 23, Fibres and yarns.iv ISO 2015 All rights reserved Textiles Synthetic filament yarns Determination of
16、 shrinkage in dry-hot air (after treatment) 1 Scope This International Standard specifies methods for the determination of dry-hot air shrinkage (after treatment) of synthetic filament yarns, skein method and single-end method. The skein method provides two forms of measurement which are of manual a
17、nd automatic types. The single-end method gives the result by manual measurement. In case of dispute, manual measurement procedure is to be used. If these methods are not applicable, the corresponding test methods may be agreed between interested parties. This International Standard is applicable to
18、 synthetic filament yarns of linear density less than 3 000 dtex. This International Standard is not applicable to partially oriented yarns. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For
19、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 139, Textiles Standard atmospheres for conditioning and testing 3 Terms and definition For the purposes of this document, the following ter
20、ms and definitions apply. 3.1 shrinkage in dry-hot air (after treatment) decrease in length of a specimen as a result of thermal treatment in dry-hot air, expressed as a percentage of its original length, which measured under tension before and after treatment 4 Principle Under specific condition, a
21、 test specimen is treated in dry-hot air. Shrinkage is calculated as variation in length, measured before and after treatment. 5 Apparatus and materials 5.1 Skein winding reel, which meets the following requirements: a) 1 000 2,5 mm reel circumference, driven either automatically or manually; b) a t
22、raversing mechanism to avert overlapping when several skeins are wound at the same time; c) a tensioning device to maintain tension within the recommended limits, accurate to within 10 %; d) a device to count reel revolutions, preferably capable to stop winding automatically and warn when nearing th
23、e specified number of reel revolutions; INTERNATIONAL ST ANDARD ISO 18067:2015(E) ISO 2015 All rights reserved 1 ISO 18067:2015(E) e) a mechanism to reduce the reel circumference for easy removal of the skein. 5.2 Length-measuring stand, which meets the following requirements: a) a stand for measuri
24、ng specimen length of least 1 mm gauge length; b) a millimetre scale to determine specimen length, accurate to within 1 mm; c) a steel hook or a clamp, where the top of the hook or the lower side of the clamp (where the specimen hung from) is positioned in line with the zero index of the scale; d) t
25、ensioning weights with hooks or clamps for applying tensile force to specimens, accurate to within 10 %. 5.3 Automatic shrinkage tester, which meets the following requirements: a) automatically applies specified tension, measures specimen length, and calculates the shrinkage based on length values;
26、b) 0,05 mm resolution of length measurement;. c) a specimen holder for suspending specimens more than 600 mm high, which can consistently hold 2,5 cN load per skein for the duration of the testing procedure with several skeins arranged and tested in succession. NOTE Other mechanical devices may be u
27、sed for the test provided that equivalent results are obtained. 5.4 Ventilated oven, which meets the following requirements: a) a holder for suspending specimens in the oven more than 600 mm high during manual measurement, with test specimens adequately spaced apart so as not to touch each other and
28、 the interior sides of the oven; b) at least 600 mm high interior to accommodate the holder in an upright position, with occupied space not more than 80 % of the volume; c) a thermometer to measure and record the hot air temperature in the vicinity of the specimens; d) adequate ventilation to mainta
29、in oven temperature to an accuracy of 3 C. 6 Sampling and preparation of the test specimen 6.1 Sampling Sampling shall be performed as follows: a) in accordance with the directions given in the material specification; b) bulk laboratory sample shall be taken on demand; c) number of lot sample and la
30、boratory sample are listed in Table 1.2 ISO 2015 All rights reserved ISO 18067:2015(E) Table 1 Number of lot sample and laboratory sample Number of containers in the consignment Number of containers in the first selection Number of containers taken for consignment sample Number of packages sampled f
31、rom each container Number of packages chosen for laboratory sample 10 or less all all see note below 20 approx. 11 to 20 10 10 2 20 21 to 40 20 10 2 20 more than 40 40 20 1 20 NOTE Take an equal number of packages from container. The number of packages for laboratory sample should be at least 20. If
32、 the consignment includes less than 20 packages, sample all of them. 6.2 Preconditioning and conditioning 6.2.1 The standard atmosphere for conditioning and testing shall be as specified in ISO 139. 6.2.2 When actual moisture regain exceeds commercial value, the test specimen shall be preconditioned
33、. Specimens should be exposed in standard atmosphere for more than 30 min to reach moisture equilibrium. 6.3 Preparation of the test specimen 6.3.1 Skein method 6.3.1.1 Turns of reel The number of turns needed to obtain the set linear density of the skein is calculated according to Formula (1): 2(1)
34、 where n is the number of turns rounded to nearest whole number; T t is the set linear density of the skein expressed in dtex, listed in Table 2; T is the nominal linear density of the specimen expressed in dtex. Table 2 Set linear density of skein Nominal linear density of the specimen Set linear d
35、ensity of the skein 400 dtex 2 500 dtex 400 dtex 3000 dtex 10 000 dtex 6.3.1.2 Reeling Discard yarns on the outer layer of the package. Lead the yarn through the tension device and fix the end on the clip of the reel. Smoothly reel the skein using uniform tension lower than the specific tension calc
36、ulated as Formula (3) and reel the specific turns (see 6.3.1.1). Cut the yarn close to the clip and tie two yarn ends together, without stretching the yarns. Remove the skein from the reel carefully and avoid tangling. ISO 2015 All rights reserved 3 ISO 18067:2015(E) The test specimens are condition
37、ed in a loose and tension-free state as specified in 6.2. It is recommended that polyester and polypropylene specimens should be conditioned for more than 2 h, while polyamide specimens for at least 3 h. 6.3.2 Single-end method Discard yarns on the outer layer of the package. Cut yarn in a length of
38、 60 cm-70 cm from the package. The test specimens are conditioned in a loose and tension-free state as specified in 6.2. It is recommended that polyester and polypropylene specimens should be conditioned for more than 2 h, while polyamide specimens for at least 3 h. 6.4 Number of specimens For bulk
39、laboratory samples, the minimum number of specimens shall be two from each package and a total of 10 from one lot. For batch laboratory samples, prepare one specimen from each package and not less than 20 total. In case of arbitration, prepare three specimens from each package and not more than 60 t
40、otal. 7 Testing conditions 7.1 Dry-hot air treatment conditions Dry-hot air treatment conditions vary for different kinds of yarns. Recommended temperature and treatment duration are listed in Table 3. For yarns not mentioned in Table 3, temperature and treatment time will be determined as agreed. T
41、able 3 Hot air temperature and thermal treatment time Shape of the yarns Type of the yarns Hot air temperature (C) Thermal treatment time (min) Multifilament polyester, polyamide 66 190 3 15 1 polyamide 6 170 3 15 1 polypropylene 110 3 15 1 Monofilament polyester 180 3 15 1 polyamide 66 180 3 10 1 p
42、olyamide 6 150 3 10 1 polypropylene 110 3 15 1 7.2 Tension for the test specimen Calculate the tension in skein method according to Formula (2): (2) where F is the tension expressed in cN; P is the tension per unit linear density expressed in cN/dtex; T t is the set linear density of the skein expre
43、ssed in dtex.4 ISO 2015 All rights reserved ISO 18067:2015(E) Calculate the tension in single-end method according to Formula (3): (3) where F is the tension expressed in cN; P is the tension per unit linear density expressed in cN/dtex; T is the nominal linear density of the yarn expressed in dtex.
44、 Tension per unit linear density is intended to be: non-texture yarns: (0,05 0,01) cN/dex; textured yarns: (0,20 0,04) cN/dtex. For those filament yarns not applicable, tension will be determined as agreed. 7.3 Equilibrium time for test specimen after thermal treatment Test specimens should reach mo
45、isture equilibrium after thermal treatment in standard atmosphere specified in 6.2.2. It is recommended that polyester and polypropylene specimens should be conditioned for more than 2 h, while polyamide specimens for at least 3 h. 8 Testing procedure 8.1 Skein method A (Manual measurement) 8.1.1 Me
46、asuring the initial length of the test specimens Hang one conditioned skein from the hook at the top of the length-measuring stand (5.2), with the knot placed at the hook. Carefully add sufficient weight on the bottom of the skein, to produce the tension calculated in 7.2. This tension shall be reac
47、hed slowly to prevent any over-tensioning. Maintain the tension for (30 3) s and measure the straightened length (L 0 ) to an accuracy of 1 mm. Remove weight and skein after measurement. Take the skein and suspend it from a holder in the oven (5.4). Repeat above procedures in sequence, till all skei
48、ns have been tested. 8.1.2 Thermal treatment of the test specimens Preheat the oven (5.4) to the specified temperature according to Table 3 in 7.1 and keep temperature steady. Place the holder into the oven quickly (within 5 s or less), to minimize the temperature decrease in the oven. When the oven
49、 reaches the specified temperature, begin measuring treatment time as specified in 7.1. 8.1.3 Equilibrium after thermal treatment After treatment, carefully take out the holder with skeins. Condition the skeins as specified in 7.3, with skeins in loose and tension-free state. ISO 2015 All rights reserved 5 ISO 18067:2015(E) 8.1.4 Measuring the length of the test specimens after treatment Follow procedures in 8.1.1 and measure the straightened length (L s
