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1、BRITISH STANDARD BS ISO 7772-2:1996 Implementation of ISO 7772-2:1996 Assessment of industrial laundry machinery by its effect on textiles Part 2: Extracting machines ICS 97.060 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1
2、996 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 12-1998 The following BSI references relate to the work on this standard: Commit
3、tee reference TCI/25 Draft for comment 91/36491 DC ISBN 0 580 26862 4 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 Consultin
4、g 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 Re
5、search Association Ltd. Home Laundering Consultative Council International Wool Secretariat Mall 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 Fin
6、ishers 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 08:55:20
7、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 BSI 12-1998i Contents Page Committees responsible Inside front cover National foreword i Foreword ii Introduction 1 1Scope 1 2Normative references 1 3Definitions2 4Preparation2 5Determination of relationship between moisture retention an
8、d extraction-cycle time for batch machines used as independent units4 6Determination of relationship between moisture retention and extraction-cycle time for batch machines used as units in automatic-transfer batch-processing systems5 7Determination of specific electrical energy consumption and char
9、acteristics of the power requirements7 8Test report9 Annex A (normative) Identification of the test machine10 Annex B (normative) Selection of nominal test running times and plotting of graphs of moisture retention against time and energy consumption against time10 Annex C (normative) Washing proces
10、s12 Annex D (normative) Determination of mass of equivalent test load12 Figure B.1 Example of moisture retention after hydro-extraction, and energy consumption11 Table 1 Requirements for test pieces3 Table 2 Format for recording details of power and peak loading of electric motors4 Table 3 Format fo
11、r recording additional information on part II clause 6 tests9 Table 4 Format for recording additional information on part II clause 6 tests9 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 ii BSI 12-1998 National foreword
12、This British Standard reproduces verbatim ISO 7772-2:1996 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: aid enquirers to understand the
13、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 Standards, as well as overseas stan
14、dards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. This standard supersedes BS 6246-2:1983, 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 correc
15、t 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, page ii, pages 1 to 13 and a back cover. This standard has been updated (see
16、 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 08:55:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:
17、20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 ii 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 normally carried out through ISO technica
18、l 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 the work. ISO collaborates closely wit
19、h 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 requires approval by at least 75 % of t
20、he member bodies casting a vote. International Standard ISO 7772-2 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 general title Assessment of industrial laund
21、ry 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. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:20 GMT+00:00 20
22、06, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 BSI 12-19981 Introduction The rapid technical development of 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
23、approaches to the provision of the necessary information were considered: a) definition of essential specifications 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 p
24、rincipal types of machine so that the results obtained on machines of a similar type could be compared directly 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
25、 a range of machines to evaluate their effects under reproducible conditions, including specification of the loads 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
26、. Another advantage in the approach adopted is that the tests can be conducted at any location where the necessary 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:
27、Batch-drying tumblers. It is hoped that, with the advance of techniques, and widespread use of these parts of ISO 7772, updated methods can be incorporated. 1 Scope This part of ISO 7772 specifies methods for the assessment of extracting machines in which water is removed mechanically from textile a
28、rticles in their wet state after washing. This part of ISO 7772 does not apply to high-speed centrifugal extractors having a cycle time of less than 4 min. In the case of batch-extracting machines, this part of ISO 7772 only covers machines with a load capacity in excess of 7 kg of air-dry textiles.
29、 The following characteristics are determined: a) For batch machines only, the moisture retention of the extracted load in relation to the length of the extraction cycle time, for a specific degree or for specific degrees of machine loading. The method is selected in accordance with the particular c
30、ircumstances of use of the machine, as follows: 1) when operated as an independent extraction unit and normally loaded to the full rated capacity, the method described in clause 5 is used;) 2) when operated as an extraction component of an automatic-transfer processing unit that consecutively proces
31、ses discrete batch loads of a given mass within given intervals of cycle time, the procedures described in clause 6 are used. b) For roller-type extractors which normally form an integral part of an automatic-transfer processing unit, the moisture retention in relation to the productive capacity cor
32、responding to a specified mass flow rate or rate of loading. The procedures described in clause 6 are used. c) Specific electrical-energy consumption and characteristics of power requirements. The method described in clause 7 is used. The methods described in this International Standard can be used
33、separately, and therefore any combination of them can be agreed on between the interested parties. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 7772. At the time of publication, the editions indicat
34、ed 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 of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Internation
35、al Standards. ISO 653:1980, Long solid-stem thermometers for precision use. ISO 1770:1981, Solid-stem general purpose thermometers. ISO 3801:1977, Textiles Woven fabrics Determination of mass per unit length and mass per unit area. ISO 5081:1977, Textiles Woven fabrics Determination of breaking stre
36、ngth and elongation (Strip method). ISO 6348:1980, Textiles Determination of mass Vocabulary. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:55:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 2 BSI 12-1998 ISO 7211-2:1984, Textiles Woven fabrics Construction Methods of an
37、alysis Part 2: Determination of number of threads per unit length. ISO 7772-4:1996, Assessment of industrial laundry machinery by its effect on textiles Part 4: Batch-drying tumblers. ISO 9398-1:1993, Specifications for industrial laundry machines Definitions and testing of capacity and consumption
38、characteristics Part 1: Flatwork ironing machines. ISO 9398-2:1993, Specifications for industrial 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 testin
39、g of capacity and consumption characteristics Part 3: Washing tunnels. ISO 9398-4:1993, Specifications for industrial laundry machines Definitions and testing of capacity and consumption characteristics Part 4: Washer-extractors. IEC 258:1968, Direct acting recording electrical measuring instruments
40、 and their accessories. 3 Definitions For the purposes of this part of ISO 7772, the following definitions apply. 3.1 air-dry mass (ADM) the total mass of clean textile articles including the mass of moisture absorbed from the ambient atmosphere (See also 3.2.) 3.2 bone-dry mass (BDM) (moisture cont
41、ent between 0,5 % and 1,0 %): The mass of a clean textile article (or number of articles) after being dried in a specified manner, when successive determinations of mass after several drying procedures show no progressive change in mass of the textile greater than 0,5 % NOTE 1Specified drying proced
42、ures include repeated processing of the article or articles in a heated tumbler from which the exhaust air reaches a temperature 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 cotto
43、n fabrics which constitute the test loads and test pieces specified in this part of ISO 7772. 3.3 g-factor the numerical value obtained from the following equation: where 3.4 hourly output the mass of textile articles that a hydro-extractor processes in one hour under defined conditions 3.5 moisture
44、 retention the amount of moisture retained by textile articles after extraction, usually expressed as a percentage of the mass of the textile articles in their dry state as defined at commencement of test 3.6 laundry regain the difference between air-dry mass and bone-dry mass expressed as a percent
45、age of bone-dry mass NOTE 2Laundry regain is not applicable when air-dry mass is used as a basis for calculations. NOTE 3This term is used for practical purposes for industrial laundry machinery, but does not have the same meaning as “moisture regain” (see ISO 6348). 3.7 used sheets sheets subjected
46、 to conditions of average normal use 3.8 steady state the state in which the rate of flow of textile articles, the temperatures, the chemical conditions and the rates of flow of appropriate services in a continuous-washing machine are stabilized at the conditions required for the specific tests to b
47、e carried out 4 Preparation 4.1 Machine identification The data required for the identification of the test machine and of any mechanical aids used for loading, unloading or feeding, and of any other ancillary equipment directly associated with and necessary for the operation of the test machine sha
48、ll be recorded in accordance with annex A. The reference numbers of any diagrams, drawings or photographs necessary to supplement these data shall also be recorded. dis the diameter, in centimetres, of the cage; nis the revolutions per minute of the cage. g-factor0,56 d n 1000 - - 2 = Licensed Copy:
49、 sheffieldun sheffieldun, na, Mon Nov 27 08:55:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7772-2:1996 BSI 12-19983 4.2 Test pieces for moisture-retention tests 4.2.1 All test articles shall be in good repair and shall be free from tears, snags or repaired sections. In addition, they shall satisfy the requirements specified in Table 1. Table 1 Requirements for test pieces 4.2.2 For machines of load capacity in excess of 20 kg, the test pieces shall be sheets complying with the re
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