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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7563:1999 Incorporatin
2、g Corrigendum No. 1 ICS 61.020 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Non-prescriptive graduated support hosiery Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
3、 BS 7563:1999Issue 2, May 1999 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 1999 BSI 05-1999 First published as BS 7563 March 1992 ISBN 0
4、580 28265 1 Amendments issued since publication Amd. No.DateText affected 10531 Corrigendum May 1999Indicated by a sideline Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CH/39, Compression hosiery and elastic hose suppo
5、rts, upon which the following bodies were represented: British Medical Association British Retail Consortium Consumer Policy Committee of BSI Department of Health Medical Devices Agency Knitting Industries Federation Ltd. National Association of Medical compression factor single nominal compression
6、value characterizing the compression performance of a garment NOTEThis is assigned by the manufacturer on the basis of measurements of similar garments and is equal to the compression which the garment is intended to exert at the ankle when worn on a leg of a size designated by the manufacturer. 3.3
7、 normal measuring positions positions at the ankle, calf and thigh of a garment at which compression is measured NOTE 1Additional measuring positions may also be defined by the manufacturer. NOTE 2Testing of designated sizes is achieved by use of the HATRA test equipment, which simulates human leg d
8、imensions. Details of the corresponding girths and the set-up procedure are given in Tables A.1 and A.2. 3.4 stiffness measure of the change in compression exerted by a garment when girth is increased or decreased from the manufacturers original designation of girth by an amount equivalent to a chan
9、ge of one size position of the adjustable former of the compression testing machine 3.5 sample set sample consisting of 15 legs of garments, each selected at random from the group of garments which the sample is intended to represent 3.6 foot length horizontal distance between the perpendiculars in
10、contact with the end of the most prominent toe and the most prominent part of the heel, measured with the subject standing and with the weight of the body equally distributed between both feet BS 4981 NOTESee Figure 1. 3.7 ankle girth horizontal girth of a human leg just above the medial malleolus,
11、measured with the subject standing and with the weight of the body equally distributed between both feet NOTESee Figure 2. 3.8 calf girth girth of a human calf measured at its maximum circumference, the upper edge of the tape measure passing horizontally though the point of maximum circumference, me
12、asured with the subject standing with the weight of the body equally distributed on both feet NOTESee Figure 2. 3.9 thigh girth horizontal girth of a human leg measured half way between the crotch and the knee joint, measured with the subject standing with the weight of the body equally distributed
13、on both feet NOTESee Figure 2. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BSI 05-1999 BS 7563:1999Issue 2, May 1999 1) If defined as being different from that described in Table A.2 and its note, i.e. if
14、 the ankle girth for which the garment is being tested is different from former setting number 5. 3.10 hip girth horizontal girth of a human body measured round the buttocks at the level of maximum circumference BS 5511 NOTESee Figure 3. 3.11 reciprocated heel heel pouch formed within the knit of th
15、e garment 3.12 defined heel heel position as located in accordance with annex B of this British Standard 4 Performance 4.1 Compression value The manufacturer shall assign a compression value in whole numbers of millimetres of mercury to each garment on the basis of compression measurements on the sa
16、mple set of garments as specified in 4.2 to 4.3. When a sample set of garments is tested as described in annex A except for change of compression with girth (stiffness) testing as described in A.5, not more than one garment shall exert a compression at the ankle outside a range of (15 % + 1 mmHg) of
17、 the claimed compression value. NOTEThis tolerance takes account of the variability inherent in the manufacture of knitted elastic textiles. It has been found that if all the sample set fall within the range specified, then 9 out of 10 of the group from which the set was selected can be expected to
18、fall within the same range, i.e. a confidence level of 90 % applies. 4.2 Change of compression with girth (stiffness) When a sample set of garments is tested in accordance with A.5, the mean compression of the set at each measuring position, obtained on formers one size smaller and one size larger t
19、han the size appropriate to the claim on the label, shall lie within 25 % of the mean obtained when the measurements are taken on the sample set with the former set to the size appropriate to the claim on the label. | 4.3 Compression profile When tested in accordance with A.1 to A.4 the mean pressur
20、e at the three measuring positions of a sample set shall conform to Table 1 for the appropriate compression value. If the garment is intended to be retained in position on the leg by a welt or similar means, the means of retention shall not be restrictive. 5 Garment description When describing a gar
21、ment, its size shall be described by body measurements as defined in clause 3 and specified in a), b) or c) of this clause. Its compression value shall be described in accordance with Table 2. a) Below-knee garments i) mean ankle girth for which the garment is intended1); ii) maximum foot length. b)
22、 Thigh length stockings i) mean ankle girth for which the garment is intended1); ii) maximum foot length. c) Tights i) mean ankle girth for which the garment is intended1); ii) maximum foot length, for garments with a closed toe and heel (with or without reinforcement); iii) range of hip girths; iv)
23、 wearers height. 6 Marking Garments shall have the following information clearly marked on the package: a) the name, trade mark or other means of identification of the manufacturer and/or supplier; b) the number and date of this British Standard, i.e. BS 7563:1999; c) the compression value claimed f
24、or the garment in accordance with clause 5; d) the garment description conforming to clause 5; e) handwashing instructions conforming to BS EN 23758. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 04-19993
25、 BS 7563:1999 Figure 1 Length of foot Figure 2 Girth positions Figure 3 Hip girth Table 1 Compression profile Compression value at the ankle Proportion of ankle compression at calf Proportion of calf compression at thigh mmHg% 6 to 12Less than 100Less than 100 Table 2 Garment description Garment des
26、criptionNominal ankle pressure mmHg Light support6 Medium support8 Firm support10 Extra firm support12 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7563:1999 4 BSI 04-1999 Annex A (normative) Method of te
27、st for compression A.1 Principle The garment is loaded onto an adjustable former, simulating wearing the garment on a human leg. The circumferential tension value is determined by a measuring head pressed against the stretched fabric at various points along the length of the adjustable former. The v
28、alue obtained is converted to a value for compression. By changing the size of the former, measurements of the stiffness of the garment, i.e. the extent to which compression changes with girth are taken. For a fuller description of the functioning of the apparatus see Peat (1978) 1. A.2 Apparatus A.
29、2.1 Hosiery compression testing machine, (see Figure A.1) comprising an adjustable former and a measuring head which conform to the following: a) adjustable former consisting of: 1) a flat former, consisting of two metal bars arranged to give a simplified leg form, the movable top bar capable of bei
30、ng lowered by a hand lever to enable the garment to be loaded; 2) pivots at each end of the former which can be moved to different holes to enable the former to adopt any one of seven girths given in Table A.1; 3) a fixed lower bar having two curved attachments simulating the calf and thigh, with cl
31、ips attached to the movable top and fixed lower bars carrying conventional suspender-type fasteners to hold the garments, the clips being movable along the bars to hold garments at the correct position according to size; 4) a transverse rail having three marked positions to which the head is set in
32、order to ensure that pressures are measured in the same position for all garments irrespective of their size. The marked positions locating the measuring points shall be positioned 100 mm, 310 mm and 600 mm respectively from a sole point; 5) a sole point, representing the sole of the foot on former
33、setting number 4, lying at the intersection of the line of the sole (see inset in Figure A.1) of the simulated foot with a line midway between the outer surfaces of the movable top and fixed lower bars; b) measurement head consisting of the following: 1) a movable tongue 25 mm wide and a guard plate
34、 which prevents excessive movement of the tongue, and designed to be sensitive to tension in the garment only in the circumferential direction (see Figure A.2); 2) a motor within the head which balances the force exerted by the fabric on the tongue; 3) a digital display which shows a reading proport
35、ional to the fabric tension. A.2.2 Jig for checking setting of the measurement tongue, as shown in Figure A.3. A.2.3 Feeler gauge, of thickness (0.075 0.01) mm. A.2.4 Equipment for calibrating the measurement head, comprising a pin, spring, tape, reference weight of mass (400 2) g and a small screwd
36、river for adjusting the two potentiometers. NOTEThe equipment is shown mounted on the compression test machine in Figure A.1. A.3 Preparation of apparatus A.3.1 Checking the setting of the measurement tongue NOTEThe measurement head is illustrated in Figure A.2. Check the setting of the measurement
37、tongue in relation to its guard plate if the head is knocked or otherwise mishandled and in any case at intervals of not more than three months by the following procedure. a) Slide the jig supplied with the instrument (A.2.2) over the top of the measurement head A.2.1b) as shown in Figure A.3 so tha
38、t the brass plate inside the jig contacts the guard plate at each side. b) Read the display by pressing the operating button. c) Insert the feeler gauge (A.2.3) between the brass plate and the measurement tongue and read the display again. d) If the reading without the feeler gauge is more than 200,
39、 or the reading with the feeler gauge is less than 200, the head is out of alignment and the supplier of the instrument should be consulted. NOTEThe reading is a dimensionless number. A.3.2 Calibration of the measurement head When the machine is in use, calibrate the measurement head once a day by t
40、he following procedure. a) Remove the lower suspender clip plate, set the former to setting number 6 and raise the movable top bar by means of the raising bar. b) Take the calibration assembly of pin, spring, tape and reference weight (A.2.4), and insert the pin in the horizontal hole in the movable
41、 top bar, adjacent to suspender clip hole number 1. Allow the weight to tension the tape hanging across the face of the fixed lower bar, with the bottom of the weight suspended about 25 mm higher than the traverse rail as shown in Figure A.4. Adjust the pin, further into or out of the hole to allow
42、the tape to hang very close to the fixed lower bar, but not to touch it. Allow the tape to hang for not less than 3 min prior to the next step. c) Set the zero by sliding the head to a position towards the ankle end of the traverse bar at a distance of about 150 mm from the tape; move the head into
43、contact with the fixed lower bar, and press the operating button to take a reading. Adjust the zero potentiometer to give a reading of 000. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 04-19995 BS 7563:1
44、999 d) Set the scale by tilting the head away from the fixed lower bar and slide it along to line up the tape with the centre of the head. If the reference weight is disturbed, steady it from swinging before proceeding. Move the head towards the fixed lower bar to contact the tape firmly, and ensure
45、 contact between the head, the tape and the bar. NOTEThis first contact is to stabilize the tape. No reading is taken. e) Swing the head away from the tape and then move it back to contact the tape. Hold the operating button for 3 s to 7 s to allow stabilization, then adjust the scale potentiometer
46、to obtain a reading of 182. A.4 Procedure for determination of compression A.4.1 Garment preparation Wash each garment once only, using the hand washing procedure described in BS EN 26330:1994 at a temperature of 40 8C. Dry the garment flat as described in BS EN 26330:1994, Procedure C. NOTEThis pro
47、cedure is intended to eliminate any temporary effect on the compression caused by a finish applied to the garment during manufacture which would be easily removed by normal washing. A.4.2 Atmosphere for conditioning and testing A.4.2.1 Condition the dry samples for not less than 16 h in the standard
48、 temperature atmosphere for conditioning and testing textiles specified in BS 1051 i.e. temperature of (20 2) 8C and relative humidity of (65 2) %. NOTEWhen conditioning, do not stack garments one on top of another and, during the last 2 h, allow each to hang freely without contact with other garmen
49、ts. A.4.2.2 Carry out the testing under the conditions specified in A.4.2.1. NOTEA change of relative humidity of 10 % has been observed to cause a change of 5 % to 15 % in measured tension. A.4.3 Setting up the compression testing machine A.4.3.1 Choice of girth size Unless otherwise stated by the garment manufacturer, set up the adjustable former to former setting number 5 as given in Table A.1 by inserting the ends of the movable top bar in the appropriately numbered holes in the movable inner foot (see inset in Figure A.1) and the upper adjustm
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