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1、BRITISH STANDARD BS ISO 7772-4:1996 Implementation of ISO 7772-4:1996 Assessment of industrial laundry machinery by its effect on textiles Part 4: Batch-drying tumblers ICS 97.060 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4
2、:1996 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 December 1996 BSI 10-1998 The following BSI references relate to the work on this standard: Comm
3、ittee reference TCI/25 Draft for comment 91/36492 DC ISBN 0 580 26863 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TCI/25, Chemical properties, upon which the following bodies were represented: Association of Consult
4、ing Scientists Association of Suppliers to the British Clothing Industry British Apparel and Textile Confederation British Clothing Industry Association British Measurement and Testing Association British Retail Consortium Chemical Industries Association Consumer Policy Committee of BSI Fabric Care
5、Research Association Ltd. Home Laundering Consultative Council International Wool Secretariat Mail Order Traders Association Ministry of Defence National Wool Textile Export Corporation SATRA Footwear Technology Centre Soap and Detergent Industry Association Society of Dyers and Colourists Textile F
6、inishers Association The following body was also represented in the drafting of the standard through subcommittees and panels: Society of Laundry Engineers and Allied Trades Limited Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:
7、46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 BSI 10-1998i Contents Page Committees responsibleInside front cover National forewordii Text of ISO 7772-41 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 i
8、i BSI 10-1998 National foreword This British Standard reproduces verbatim ISO 7772-4:1996 and implements it as the UK national standard. This British Standard is published under the direction of the Sector Board for Materials and Chemicals whose Technical Committee TCI/25 has the responsibility to:
9、aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Sta
10、ndards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. This standard supersedes BS 6246-4:1983, which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards
11、are responsible for their correct application. 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, the ISO title page, pages ii to iv, pages 1 to 9 and a back cove
12、r. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffiel
13、dun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 ii BSI 10-1998 Contents Page Foreword iii Introduction1 1Scope1 2Normative references1 3Definitions2 4Apparatus 2 5Tolerances3 6Test pieces3 7Preparation3 8Drying-capacity evaluation3 9Energy consu
14、mption4 10Test report5 Annex A (normative) Details of drying tumblers6 Annex B (normative) Washing process7 Annex C (normative) Details of test machine and running conditions7 Annex D (normative) Conditions of test8 Annex E (informative) Example of method of calculation of moisture-removal rate8 Fig
15、ure A.1 Typical drying tumbler6 Figure E.1 Example of plot of percentage moisture removal against time9 Table 1 Requirements for towels3 Table 2 Format for recording tumble-dryer test results4 Table A.1 Types of loading 7 Table E.1 Typical tumble-dryer test results8 Licensed Copy: sheffieldun sheffi
16、eldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 BSI 10-1998iii 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 n
17、ormally 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 i
18、n the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard
19、 requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7772-4 was prepared jointly by Technical Committees ISO/TC 38, Textiles, and ISO/TC 72, Textile machinery and allied machinery and accessories. ISO 7772 consists of the following parts, under the gene
20、ral title Assessment of industrial laundry machinery by its effect on textiles: Part 1: Washing machines; Part 2: Extracting machines; Part 3: Flatwork-ironing machines; Part 4: Batch-drying tumblers. Annexes A to D form an integral part of this part of ISO 7772. Annex E is for information only. Lic
21、ensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 BSI 10-19981 Introduction The rapid technical development of
22、laundry machinery and the changes in the pattern of purchasing have led to an urgent need for a standard means of assessment of the effect of machine performance on textiles. Two different approaches to the provision of the necessary information were considered: a) definition of essential specificat
23、ions for laundry machinery for use by agreement between manufacturer and customer (see for example ISO 9398); b) preparation of standard methods for rating and assessing the effect of the principal types of machine so that the results obtained on machines of a similar type could be compared directly
24、 wherever the machines were located and whenever they were tested. This International Standard deals with the second approach, since the urgent need was for procedures that could be used on a range of machines to evaluate their effects under reproducible conditions, including specification of the lo
25、ads to be used. Thus it will be possible to compare the basic effects of one machine against another, and a machine against a specification quoted in a contract. No performance level is set. Another advantage in the approach adopted is that the tests can be conducted at any location where the necess
26、ary services are available. It is planned to publish the following four parts to ISO 7772: Part 1: Washing machines; Part 2: Extracting machines; Part 3: Flatwork-ironing machines; Part 4: Batch-drying tumblers. It is hoped that, with the advance of techniques, and widespread use of these parts of I
27、SO 7772, updated methods can be incorporated. 1 Scope This part of ISO 7772 specifies methods for the assessment of cylindrical, rotating, drying tumbler machines and similar machines in which the damp washing is loosened and partially or completely dried under the action of heated air and mechanica
28、l energy. This part of ISO 7772 only applies to batch-drying tumblers with a load capacity in excess of 10 kg of air-dry textiles. The tests results provide an indication of drying efficiency in terms of energy consumption (see clause 9) and an output rating independent of operator efficiency. The f
29、ollowing characteristics are determined: a) the ability to dry textile test articles, expressed in kilograms of moisture removed or as a percentage of the bone-dry mass of a test load for a given drying-cycle time; b) the total energy consumption, in terms of heat and electricity, per kilogram of mo
30、isture removed; c) the average and maximum mass moisture removed, per minute, from a load of textiles of known bone-dry mass; d) the time to achieve a fully dried condition. This part of ISO 7772 specifies two series of tests: employing sheets as test pieces and determining the results for partial d
31、rying; employing towels as test pieces and determining the results for full drying. The methods described in this part of ISO 7772 can be used separately, and therefore any combination of them can be agreed on between the interested parties. 2 Normative references The following standards contain pro
32、visions which, through reference in this text, constitute provisions of this part of ISO 7772. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 7772 are encouraged to investigate the possibility
33、of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3801:1977, Textiles Woven fabrics Determination of mass per unit length and mass per unit area. ISO 5081:1977, Textiles Woven fabrics Deter
34、mination of breaking strength and elongation (Strip method). ISO 6348:1980, Textiles Determination of mass Vocabulary. ISO 7211-2:1984, Textiles Woven fabrics Construction Methods of analysis Part 2: Determination of number of threads per unit length. ISO 9398-1:1993, Specifications for industrial l
35、aundry machines Definitions and testing of capacity and consumption characteristics Part 1: Flatwork-ironing machines. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 2 BSI 10-1998 ISO 9398-2:1993, Specifications for indus
36、trial laundry machines Definitions and testing of capacity and consumption characteristics Part 2: Batch drying tumblers. ISO 9398-3:1993, Specifications for industrial laundry machines Definitions and testing of capacity and consumption characteristics Part 3: Washing tunnels. ISO 9398-4:1993, Spec
37、ifications for industrial laundry machines Definitions and testing of capacity and consumption characteristics Part 4: Washer-extractors. 3 Definitions For the purposes of this part of ISO 7772, the following definitions apply. NOTE 1Particular details of drying tumblers are given in annex A. 3.1 ai
38、r-dry mass (ADM) the total mass of clean textile articles including the mass of the moisture absorbed from the ambient atmosphere (see also 3.2) 3.2 bone-dry mass (BDM) (moisture content between 0,5 % and 1,0 %) the mass of a clean textile article (or number of articles) after being dried in a speci
39、fied manner, when successive determinations of mass after several drying procedures show no progressive change in mass of the textile greater than 0,5 % NOTE 2Specified drying procedures include repeated processing of the article or articles in a heated tumbler from which the exhaust air reaches a t
40、emperature of not less than 80 C nor more than 120 C, or by repeatedly passing the article or articles through a flatwork-ironing machine. These temperatures are appropriate to cotton fabrics which constitute the test loads and test pieces specified in this part of ISO 7772. 3.3 initial moisture con
41、tent the mass of the textile articles before the drying process, less the bone-dry mass NOTE 3The initial moisture content is usually expressed as a percentage of the bone-dry mass. 3.4 final moisture content the mass of the textile articles after the drying process, less the bone-dry mass NOTE 4The
42、 final moisture content is usually expressed as a percentage of the bone-dry mass. 4 Apparatus 4.1 For all types of machine 4.1.1 Integrating kilowatt-hour meter, accurate to 0,1 %, for measuring electrical-energy consumption. 4.1.2 Test meter, for volts and amps, accurate to 0,1 %. 4.1.3 Stopwatch
43、4.1.4 Multi-point temperature recorder, accurate to 0,1 C. 4.1.5 Air-flow measurement apparatus 4.1.6 Weighing machine, capable of weighing 150 kg and with an accuracy of 0,5 % at full-scale deflection. 4.1.7 Measuring tape, accurate to 1 mm. 4.1.8 Moisture meter, of the electrical-conductivity type
44、, with a flat probe. Care shall be taken to confirm the accuracy of the meter and to ensure that the accuracy is not affected by chemicals in the textiles used. 4.2 For steam-heated machines 4.2.1 Recording and integrating steam-flow meter, accurate to 5 %. or 4.2.2 Condensate-measurement tank, accu
45、rate to 5 %, with temperature measurement facilities as described in ISO 7772-3:1992, clause B.2. 4.2.3 Recording steam-pressure gauge, accurate to 2 %. 4.2.4 Condensate pressure gauge 4.3 For thermal-fluid-heated machines 4.3.1 Recording and integrating flow-meter, for measuring the flow of heat-tr
46、ansfer fluid, accurate to 0,2 %. 4.3.2 Fluid inlet pressure gauge 4.3.3 Fluid outlet pressure gauge 4.3.4 Two recording thermometers, for measuring the fluid inlet and fluid outlet temperatures. 4.4 For gas-heated machines 4.4.1 Integrating gas-flow meter 4.4.2 Manometer, for measuring gas pressure.
47、 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-4:1996 BSI 10-19983 5 Tolerances Tolerances are given for numerical values of dimensions, temperatures and times that are considered critical. If no tolerance is given, the precisi
48、on of the measurements need be only that to be expected when using common instruments with reasonable care. The precision is further indicated by the number of significant figures in the values given. 6 Test pieces The following test pieces are required: a) sheets complying with ISO 7772-2:1996, Tab
49、le 1; b) bleached cotton terry-type towels measuring approximately 60 cm 120 cm, complying with Table 1 of this part of ISO 7772. All new test pieces shall be washed three times at a temperature of 90 C 5 C, using the washing process described in annex B, before being used for the tests described in this part of ISO 7772. Each test piece shall be discarded when its bone-dry mass has decreased to 93,5 % of the bone-dry mass after the first three washes by the process described in