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 hosieryBS 7563:1999 Issue 2, May 1999 This British Standard, having been prepared under the direction of the Health and Environment Sector Commit
3、tee, 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 0 580 28265 1 Amendments issued since publication Amd. No. Date Text affected 10531 Corrigendum May 1999 Indicated by a sideline Committees
4、responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CH/39, Compression hosiery and elastic hose supports, upon which the following bodies were represented: British Medical Association British Retail Consortium Consumer Policy Committee
5、of BSI Department of Health Medical Devices Agency Knitting Industries Federation Ltd. National Association of Medical compression factor single nominal compression value characterizing the compression performance of a garment NOTE This is assigned by the manufacturer on the basis of measurements of
6、 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 normal measuring positions positions at the ankle, calf and thigh of a garment at which compression is measured NOTE 1 Additional mea
7、suring positions may also be defined by the manufacturer. NOTE 2 Testing of designated sizes is achieved by use of the HATRA test equipment, which simulates human leg dimensions. Details of the corresponding girths and the set-up procedure are given in Tables A.1 and A.2. 3.4 stiffness measure of th
8、e 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 change of one size position of the adjustable former of the compression testing machine 3.5 sample set sample consisting of 15 legs of g
9、arments, 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 contact with the end of the most prominent toe and the most prominent part of the heel, measured with the subject standing and with
10、the weight of the body equally distributed between both feet BS 4981 NOTE See Figure 1. 3.7 ankle girth horizontal girth of a human leg just above the medial malleolus, measured with the subject standing and with the weight of the body equally distributed between both feet NOTE See Figure 2. 3.8 cal
11、f 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, measured with the subject standing with the weight of the body equally distributed on both feet NOTE See Figure 2. 3.9 thigh girth h
12、orizontal 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 on both feet NOTE See Figure 2.2 BSI 05-1999 BS 7563:1999 Issue 2, May 1999 1) If defined as being different from that described
13、in Table A.2 and its note, i.e. if 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 NOTE See Figure 3. 3.11 reciprocated heel heel
14、 pouch formed within the knit of the 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
15、 compression measurements on the sample 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 ou
16、tside a range of (15 % + 1 mmHg) of the claimed compression value. NOTE This 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
17、set was selected can be expected to 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 on
18、e size smaller and one size larger than 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 accorda
19、nce with A.1 to A.4 the mean pressure 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 Garme
20、nt description When describing a garment, 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 int
21、ended 1) ; ii) maximum foot length. b) Thigh length stockings i) mean ankle girth for which the garment is intended 1) ; ii) maximum foot length. c) Tights i) mean ankle girth for which the garment is intended 1) ; ii) maximum foot length, for garments with a closed toe and heel (with or without rei
22、nforcement); iii) range of hip girths; iv) 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 756
23、3:1999; c) the compression value claimed for the garment in accordance with clause 5; d) the garment description conforming to clause 5; e) handwashing instructions conforming to BS EN 23758. BSI 04-1999 3 BS 7563:1999 Figure 1 Length of foot Figure 2 Girth positions Figure 3 Hip girth Table 1 Compr
24、ession profile Compression value at the ankle Proportion of ankle compression at calf Proportion of calf compression at thigh mmHg % % 6 to 12 Less than 100 Less than 100 Table 2 Garment description Garment description Nominal ankle pressure mmHg Light support 6 Medium support 8 Firm support 10 Extr
25、a firm support 12BS 7563:1999 4 BSI 04-1999 Annex A (normative) Method of test 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 stretch
26、ed fabric at various points along the length of the adjustable former. The value 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 descrip
27、tion of the functioning of the apparatus see Peat (1978) 1. A.2 Apparatus A.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 bar
28、s arranged to give a simplified leg form, the movable top bar capable of being 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 lo
29、wer bar having two curved attachments simulating the calf and thigh, with clips 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)
30、a transverse rail having three marked positions to which the head is set in 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
31、 a sole point; 5) a sole point, representing the sole of the foot on former 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 c
32、onsisting of the following: 1) a movable tongue 25 mm wide and a guard plate 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
33、the fabric on the tongue; 3) a digital display which shows a reading proportional 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, comprisin
34、g a pin, spring, tape, reference weight of mass (400 2) g and a small screwdriver for adjusting the two potentiometers. NOTE The 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 NOTE The measur
35、ement head is illustrated in Figure A.2. Check the setting of the measurement 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
36、.2) over the top of the measurement head A.2.1b) as shown in Figure A.3 so that 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 t
37、he display again. d) If the reading without the feeler gauge is more than 200, 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. NOTE The reading is a dimensionless number. A.3.2 Calibration of the measurement
38、head When the machine is in use, calibrate the measurement head once a day by the 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 ref
39、erence weight (A.2.4), and insert the pin in the horizontal hole in the movable 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
40、 shown in Figure A.4. Adjust the pin, further into or out of the hole to allow 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 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.
