1、BRITISH STANDARD BS EN 22313:1992 ISO 2313:1972 Textile fabrics Determination of the recovery from creasing of a horizontally folded specimen by measuring the angle of recovery The European Standard EN 22313:1992 has the status of a British Standard UDC 677.0741.076:677.017.832:620.1BSEN 22313:1992
2、This British Standard, having been prepared under the direction of the Textile and Clothing Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15September1992 BSI 07-1999 The following BSI references relate to the work on this standard: Comm
3、ittee reference TCM/24 Special announcement in BSI News January 1992 ISBN 0 580 21182 7 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries.
4、Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Ice
5、land Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Quali
6、dade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBS EN 22313:1992 BSI 07-1999 i Contents Pag
7、e Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 22313 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN 22313:1992 ii BSI 07-1999 National foreword This British S
8、tandard has been prepared under the direction of the Textiles and Clothing Standards Policy Committee. It is the English language version of EN22313:1992 “Textiles fabrics Determination of the recovery from creasing of a horizontally folded specimen by measuring the angle of recovery”, which is iden
9、tical with ISO2313:1972, published by the International Organization for Standardization (ISO). It supersedes BS3086:1972 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applic
10、ation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2to6, an inside back cover and a back cover. This standard has been updated (see
11、copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 22313 June 1992 UDC 677.0741.076:677.017.832:620.1 Descriptors: Textiles, fabrics, bend tests, crease retention, crum
12、pliness English version Textile fabrics Determination of the recovery from creasing of a horizontally folded specimen by measuring the angle of recovery Etoffes Dtermination de lauto-dfroissabilit dune prouvette plie horizontalement, par mesurage de langle rmanant aprs pliage Textilien Flchengebilde
13、 Bestimmung der Knitter-Erholfhigkeit einer horizontal gefalteten Gewebeprobe durch Messung der Erholungswinkels This European Standard was approved by CEN on 1992-06-26. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
14、 Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, Fr
15、ench, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland,
16、 France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussel
17、s 1992 Copyright reserved to CEN members Ref. No. EN 22313:1992EN22313:1992 BSI 07-1999 2 Foreword This European Standard has been taken over by CEN/TC248 “Textiles and textile products” from the work of ISO/TC38 “Textiles” of the International Organization for Standardization (ISO). The document wa
18、s submitted to CEN members to the Unique Acceptance Procedure and was approved without any modification. National standards identical to this European Standard shall be published at the latest by 1992-12-31 and conflicting national standards shall be withdrawn at the latest by 1992-12-31. Following
19、the CEN/CENELEC Common Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the UnitedKingdom. Contents Page Forewo
20、rd 0 Introduction 3 1 Scope and field of application 3 2 Reference 3 3 Definition 3 4 Principle 3 5 Apparatus 3 6 Sampling 3 7 Test specimens 4 8 Procedure 4 9 Expression of results 4 10 Test report 4 Figure 1 Apparatus with vertical guides for loading the specimen 5 Figure 2 Instrument for measurin
21、g the creaserecovery angle 5 Figure 3 Example for taking 30 specimens and marking length direction 6 Figure 4 Folding of specimen 6EN22313:1992 BSI 07-1999 3 0 Introduction Creases in textile fabrics diminish at varying rates on the removal of the creasing forces. The magnitude of the crease recover
22、y angle is an indication of the ability of a fabric to recover from accidental creasing. 1 Scope and field of application This International Standard specifies a method for determining the angle of recovery of fabrics from creasing. The results obtained by this method for textile fabrics of very dif
23、ferent kinds cannot be compared directly. Attention is drawn to the fact that for some types of fabrics, the limpness, thickness and tendency to curl of the specimen may give rise to very ill-defined crease recovery angles, and therefore an unacceptable lack of precision in making measurements. Many
24、 wool and wool mixture fabrics come under this heading. 2 Reference ISO/R139, Standard atmospheres for conditioning and testing textiles. 3 Definition crease recovery angle the angle formed between the two limbs of a strip of fabric previously folded under prescribed conditions, at a specified time
25、after removal of the creasing load 4 Principle A rectangular specimen of prescribed dimensions is folded by means of a suitable device and maintained in this state for a specified short time under a specified load. This creasing load is removed, the specimen allowed to recover for a specified time,
26、and the crease recovery angle then measured. 5 Apparatus 5.1 Apparatus for loading the specimen (press) This apparatus consists of the following parts: a) A press to apply a total load of10N 1)on an area of15mm 15mm of the folded specimen. It shall be possible to complete the removal of the load wit
27、hin a period of less than1s. b) Two flat pressure plates which remain parallel to one another throughout the period of the application of the load to the specimen. On the lower plate an area of15mm 20mm shall be marked or other provisions made to facilitate correct placement of the specimen. An exam
28、ple of a loading apparatus is shown in Figure 1. 5.2 Instrument for measuring the crease recovery angle The instrument consists of the following parts: a) A circular scale divided in degrees and correct to 0.5. It shall be possible to read the angle correct to the nearest degree without parallax err
29、or. b) A specimen grip to hold the specimen in such a manner that the fold lies in a horizontal line through the centre of the circular scale. The edge of the grip shall lie2mm from the centre of the scale, as shown in Figure 2. The specimen grip shall be rotatable about this axis to keep the free l
30、imb of the specimen in a vertical position. A suitable device is shown in Figure 2. 5.3 Auxiliary devices 5.3.1 Stop-watch 5.3.2 Tweezers with broad, spade shaped jaws. 5.3.3 Paper or metal foil not thicker than0.02mm. 6 Sampling Cut the samples so as to be as representative as possible of the whole
31、 delivery. Pending the publication of an International Standard for sampling, take samples in accordance with the national standards or established rules. Newly finished fabrics and fabrics that have been subject to washing, dry cleaning or pressing treatments may show a gradual improvement in creas
32、e recovery. Store samples from such fabrics for at least6days under room conditions before specimens are taken. The creasing propensity for cellulosic and protein fibre materials varies with time over a much longer period than6days, and to cancel any ageing effects, soak these fabrics in water at20C
33、 for30min, centrifuge and steam press while still damp before conditioning as in7.4. 1) Weight of a body of mass1.019kg is approximately equal to a force of10N.EN22313:1992 4 BSI 07-1999 7 Test specimens 7.1 Selection In order to ensure a representative average for the fabric to be tested, take spec
34、imens in the manner shown in Figure 3, and ensuring that specimens are taken not less than50mm from the selvedges. Do not take specimens from creased, wrinkled, bent, or deformed parts. Mark the length, for example (warp) direction on the face side of the fabric. 7.2 Dimensions Cut rectangular speci
35、mens each40mm long and15mm wide. 7.3 Number Unless otherwise agreed by the parties interested in the test results, prepare not fewer than20 specimens for each test, half of them taken with their short sides parallel to the warp (woven fabric) or wales (knitted fabric) or the direction marked “length
36、” (non-woven fabric) and the other half with their short sides parallel to the weft (woven fabric) or courses (knitted fabric) or at right angles to the length direction (non-woven fabric). 7.4 Conditioning a) Condition the specimens for at least24h in one of the standard atmospheres for testing tex
37、tiles according to ISO/R139, (20 2 C and652% relative humidity, or272C and 65 2% relative humidity) ensuring exposure of all surfaces to the air, for instance by placing the specimens on wire-gauze or mesh. Take suitable steps to ensure that equilibrium is approached from the dry side, but in no cir
38、cumstances expose the specimens to a temperature above50C. After the specimens have been conditioned, handle them solely with tweezers or rubber fingerstalls. Strict observance of all test conditions in respect of preparation and handling of specimens is essential if reliable values of crease recove
39、ry angle are to be obtained. b) For high humidity determinations, condition the specimens for at least24h at a temperature of352C and902% relative humidity. 8 Procedure 8.1 General conditions Conduct all testing in the test atmosphere chosen see7.4 a) and7.4 b). Screen the testing equipment from dra
40、ughts, from the operators breath and from excessive heat radiation from lighting appliances. 8.2 Loading Fold the specimen end to end and hold in this position by tweezers, gripping no more than5mm from the ends. Where the surfaces of the specimens show any tendency to adhere, place a sheet of paper
41、 or metal foil18mm 15mm between the limbs of the specimen (see Figure 4). Then place the specimen on the marked area of the lower plate of the loading device, and apply the load gently, without delay. Fold half the number of test specimens face to face, the other half back to back. Load the specimen
42、s for5min 5s. Thereafter remove the load quickly but smoothly so that the specimen does not suddenly spring open, completing the removal in less than1s. By means of tweezers, transfer the specimen directly to the specimen holder of the measuring instrument. To make the transfer, hold in the flat of
43、the forceps that arm of the specimen which is to hang down and gently introduce the other arm between the two parts of the grip as far as but no farther than the back stop, taking care not to disturb the existing crease formation. 8.3 Measurement of the crease recovery angle While the specimen is in
44、 the holder, adjust the instrument continuously to keep the suspended free limb always in a vertical position. Read the crease recovery angle5min after the removal of the load and the paper or metal foil from the folded specimen. If the free limb twists or curls slightly, use a vertical plane throug
45、h its centre and the axis of the circular scale to serve as a basis for reading the crease recovery angle. 9 Expression of results Calculate the mean value, to the nearest degree, for the following: 1) crease across length (for example, warp) direction a) face to face, b) back to back; 2) crease acr
46、oss transverse (for example, weft) direction a) face to face, b) back to back. 10 Test report The test report shall include the following particulars: a) reference to this International Standard; b) simple designation of the tested cloth;EN22313:1992 BSI 07-1999 5 c) whether a standard or high humid
47、ity atmosphere was used; d) date of beginning of pre-conditioning and conditioning, and duration of exposure of the specimens to the standard atmosphere for testing textiles; e) date of test; f) number of specimens evaluated; g) mean values calculated in accordance with section9 for face and back of
48、 the sample, to the nearest degree in both longitudinal and transverse directions; h) standard deviation and confidence interval, if required. Figure 1 Apparatus with vertical guides for loading the specimen Figure 2 Instrument for measuring the crease recovery angleEN22313:1992 6 BSI 07-1999 Figure
49、 3 Example for taking 30 specimens and marking length direction Figure 4 Folding of specimenBSEN22313:1992 BSI 07-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/24, upon which the following bodies were represented: Association of Consulting Scientists British Nonwovens Manufacturers Association British Pol
