BS 7552-2-1992 Effect of dry heat on fabrics under low pressure - Method for determination of dimensional change in fabrics exposed to dry heat《织物在低压下的干热效应 干热下织物尺寸变化的测定方法》.pdf

1、BRITISH STANDARD BS 7552-2: 1992 ISO 9866-2: 1991 Effect of dry heat on fabrics under low pressure Part 2: Method for determination of dimensional change in fabrics exposed to dry heatBS7552-2:1992 This British Standard, having been prepared under the directionof the Textiles and Clothing Standards

2、Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on 28February1992 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference TCM/25 Draft for comment 89/46343 DC ISBN 0 580 20496 0 Committees responsible for this B

3、ritish Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/25, upon which the following bodies were represented: Association of Consulting Scientists Association of Manufacturers of Domestic Electr

4、ical Appliances British Retailers Association British Textile Confederation Home Laundering Consultative Council International Wool Secretariat Lambeg Industrial Research Association Mail Order Traders Association Ministry of Defence National Wool Textile Export Corporation Soap and Detergent Indust

5、ry Association Society of Dyers and Colourists Textile Research Council (FCRA) Textile Research Council (HATRA) Amendments issued since publication Amd. No. Date CommentsBS7552-2:1992 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative ref

6、erences 1 3 Principle 1 4 Apparatus 1 5 Atmospheres for conditioning and testing 1 6 Test specimens 1 7 Procedure 1 8 Expression of results 2 9 Test report 2 Figure 1 Test specimens 2 Publication(s) referred to Inside back coverBS7552-2:1992 ii BSI 10-1999 National foreword This Part of BS7552 has b

7、een prepared under the direction of the Textiles and Clothing Standards Policy Committee. It is identical with ISO9866-2:1991 “Textiles Effect of dry heat on fabrics under low pressure Part2. Determination of dimensional change in fabrics exposed to dry heat”, which was prepared by Technical Committ

8、ee38, Textiles, of the International Organization for Standardization (ISO) with the active participation of the UK. A related British Standard to ISO3759:1984 is BS4931:1986 “Methods for preparation, marking and measuring of textile fabrics, garments and fabric assemblies in tests for assessing dim

9、ensional change”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Intern

10、ational Standard Corresponding British Standard ISO 139:1973 BS 1051:1981 Glossary of terms relating to the conditioning, testing and mass determination of textiles (Technically equivalent) a ISO 9866-1:1991 BS 7552 Effect of dry heat on fabrics under low pressure Part 1:1992 Method for dry heat tre

11、atment of fabrics (Identical) a A revision is in preparation. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporat

12、ed. This will be indicated in the amendment table on the inside front cover.BS7552-2:1992 BSI 10-1999 1 1 Scope This part of ISO9866 specifies a method for determining the dimensional change of fabrics on exposure to dry heat. It is intended to predict the behaviour of fabrics in garment-making proc

13、esses such as fusing and transfer printing. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO9866. At the time of publication, the editions indicated were valid. All standards are subject to revision, an

14、d parties to agreements based on this part of ISO9866 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IECandISO maintain registers of currently valid International Standards. ISO 139:1973, Textiles Standard atmospheres f

15、or conditioning and testing. ISO 3759:1984, Textiles Preparation, marking and measuring of fabric specimens and garments in tests for determination of dimensional change. ISO 9866-1:1991, Textiles Effect of dry heat on fabrics under low pressure Part 1: Procedure for dry-heat treatment of fabrics. 3

16、 Principle Specimens of fabric are heated under specified conditions in accordance with the method described in ISO9866-1, and the changes in specimen dimensions are measured. 4 Apparatus 4.1 Press, as described in ISO9866-1. It is essential that the working area of the test press is larger than the

17、 specimen size. 4.2 Rule, not less than750mm in length, preferably with an engraved, bevelled edge, marked in millimetres, for measuring fabric specimens. 4.3 Flexible steel rule or fibre-glass tape, marked in millimetres, for measuring garments. 4.4 Means of marking reference points, for example: 4

18、4.1 Indelible ink 4.4.2 Fine threads, of colour contrasting with the fabric. 4.4.3 Heated wire, with which small holes may be made (for thermoplastics fabrics only). 4.4.4 Staples, with measurements made from the point of entry of the staple into the fabric. Indicate on the fabric which end of the

19、staple is used for measurement. 4.5 Flat table, of dimensions such that the complete article being tested can be laid flat for measurement. 4.6 Means of producing the standard atmosphere for conditioning and testing textiles, as specified in clause5. 5 Atmospheres for conditioning and testing Unless

20、 otherwise indicated, the following atmospheres, as specified in ISO139, shall be used: a) for pre-conditioning, an atmosphere having a relative humidity of10% or lower and temperature of50 C or lower; b) for conditioning and testing, an atmosphere having a relative humidity of (65 2)% and a tempera

21、ture of (20 2) C or (27 2) C. 6 Test specimens Prepare test specimens as described in ISO3759, except that the dimensions and distance between reference points shall be as follows: Cut two uncreased specimens with edges parallel to the length and width of the fabric. Overall specimen dimensions shal

22、l be240mm in the weft or course direction and290mm in the warp or wale direction (seeFigure 1). Do not take specimens directly from the ends of the material since experience has shown that the mass per unit area (or structure) and the finishing may be different to that of the majority of the fabric.

23、 7 Procedure 7.1 Determine the dimensionsAB,CD,EF andGH (seeFigure 1) of a preconditioned see clause5 a) specimen to the nearest0,5mm. 7.2 Expose the specimen to dry heat as described in ISO9866-1. Unless otherwise specified, use the following test conditions: temperature: 150 C pressure: 0,3kPa tim

24、e:20 s It is essential that the working area of the test press is larger than the specimen size. 7.3 If required, measure the dimensionsAB,CD,EF andGH of the specimen to the nearest0,5mm as soon as the specimen has cooled. 7.4 Condition the specimen in its flat state in the standard atmosphere see c

25、lause5 b) for4h or until equilibrium is reached. 7.5 Measure the dimensionsAB,CD,EF,GH of the specimen to the nearest0,5mm. 7.6 Repeat the procedure with the second specimen.BS7552-2:1992 2 BSI 10-1999 8 Expression of results 8.1 Calculate, for each specimen, the changes in dimensions, expressed as

26、a percentage of the original dimension, for each test length using the formula where 8.2 For each specimen, calculate the mean dimensional change in each direction; if required, this is done for the intermediate state (see7.3) as well as for the final, conditioned, state (see7.5). 9 Test report The

27、test report shall include the following information: a) the number and year of publication of this International Standard, i.e.ISO 9866-1:1991; b) all details necessary for the identification of the sample tested; c) any deviation from the test conditions specified; d) the mean dimensional change in

28、 each direction for each specimen, expressed as in clause8; e) if required, the mean dimensional change for the intermediate state: f) any appearance changes that occur. l 0 is the original dimension, measured on the preconditioned specimen; l 1 is the same dimension measured after the dry-heat trea

29、tment, cooling and conditioning. l 1 l 0 l 0 - 100 Figure 1 Test specimensBS7552-2:1992 BSI 10-1999 Publication(s) referred to See national foreword.BS 7552-2: 1992 ISO 9866-2: 1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsib

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