BS 4578-1970 Specification for methods of test for hardness of and for air flow through infants pillows《婴儿用枕头的硬度和透气性试验方法规范》.pdf

1、BRITISH STANDARD BS 4578:1970 Incorporating Amendment No. 1 Specification for Methods of test for hardness of, and for air flow through, infants pillowsBS4578:1970 This British Standard, having beenapproved by the Bedding Industry Standards Committee, was published under the authorityof the Executiv

2、e Boardon 30March1970 BSI08-1999 The following BSI references relate to the work on this standard: Committee reference BDM/8 BDM/8/2 Draft for comment 68/22298 ISBN 580 05678 3 Co-operating organizations The Bedding Industry Standards Committee, under whose supervision, this British Standard was pre

3、pared, consists of representatives from the following Government departments and industrial organizations: Department of Health and Social Security* Furnishing Spring Makers Federation* Institute of Iron and Steel Wire Manufacturers Ministry of Defence, Army Department Ministry of Public Building an

4、d Works National Association of Retail Furnishers* National Bedding Federation* National Union of Furniture Trade Operatives* Ticking Group* Womens Advisory Committee of the BSI* Representatives of filling materials manufacturers The Government department and industrial organizations marked with an

5、asterisk in the above list, together with the following, were directly represented on the committees entrusted with the preparation of this British Standard. British Furniture Manufacturers Federated Associations British Man-made Fibres Federation British Nursery Goods Association British Plastics F

6、ederation British Rubber Manufacturers Association National Association of Pram Retailers National Curled Woollen Flock Manufacturers Association National Feather Purifiers Association National Fillings Trades Association Amendments issued since publication Amd. No. Date of issue Comments 922 March

7、1972 Indicated by a sideline in the marginBS4578:1970 BSI 08-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Test procedure 1 3 Hardness test 1 4 Air permeability test 1 5 Washing procedure 1 Figure 1 Layout for air permeability test on pillows 2BS4578:1970

8、 ii BSI 08-1999 Foreword The BSI Committee for Nursery Bedding has been concerned for many years about the problem of a safe pillow for infants, particularly because there are occasional reports that accidental suffocation of a young child in bed has occurred, sometimes linked with a suggestion that

9、 the unexplained death of an infant may have been caused by the use of an unsatisfactory pillow. Also, with the introduction of various new types of filling materials since a British Standard for domestic pillows was first issued in1952, a number of types of pillow have become available on the marke

10、t which claim to be safe for children of all ages. The committee has therefore tried to consult anyone who may be able to contribute tothe solution of the problem of a British Standard for a safe pillow, and the inquiries have included consultation with physiologists about the breathing of young chi

11、ldren (quantity and rate of flow of air, psychological and other effects ifair flow becomes restricted, etc.). The aim has been to produce if possible a British Standard specification for a pillow which could confidently be used in cots, perambulators, etc. The result is this British Standard giving

12、 methods of test for two important characteristics, which should be read in conjunction with BS1877, “Domestic bedding, excluding cellular rubber bedding”, Part 8, “Pillows and bolsters”. Any pillow which is to be used as a pram-support pillow, or in a cot, should have on its label the warning, as r

13、ecommended by the Department of Health and Social Security, that a child under one year old should not lie on a pillow. If the pillow is one which complies with the performance requirements of BS1877-8, which invokes the methods of test of this British Standard, it should also carry a warning that a

14、ny additional pillow cover which is used should be of open construction in order not to interfere with the one property of the pillow to which designers have given special attention. There are several aspects of a pillow which may cause a certain amount of risk to the child using it, particularly th

15、e fact that if the surface becomes wet because of the child upsetting something or being sick, and the porosity of the pillow and cover does not allow the fluid to drain away quickly, any advantage which the pillow has when it is dry will be forfeited. There is also the possibility of the developmen

16、t of infection, for which reason it is reasonable to expect that a small childs pillow should be easily washed and dried and that such cleansing does not impair the performance of the pillow. This British Standard therefore includes, as an integral part of the methods of test for airflow and for har

17、dness, a washing procedure whereby the pillow is twice washed, rinsed and dried. 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

18、confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment ta

19、ble on the inside front cover.BS4578:1970 BSI 08-1999 1 1 Scope This British Standard specifies methods of test for hardness, and for permeability to air, and includes a washing procedure, for infants pillows. 2 Test procedure Each pillow to be tested shall first be subjected to the hardness test, a

20、nd then to the air permeability test. The pillow shall then be twice washed and dried in accordance with Clause5 and again subjected to the hardness and air permeability tests. 3 Hardness test The overall thickness, and the indentation of the pillow caused by a force of10N 1)applied through an inden

21、tor of100mm diameter applied to the centre of the pillow for1min shall be measured with the loaded indentor in place, and recorded. 4 Air permeability test 4.1 Apparatus. The apparatus used consists of a plane rigid unperforated support for the pillow, over which is mounted a metal tube150mm in leng

22、th, with an internal diameter of36mm. On the bottom of the tube is a metal flange with an outside diameter of100mm. Means are provided to allow either the pillow support or the tube to move in a vertical direction, and to submit the pillow under test to a thrust of10N 1) . The top of the tube is con

23、nected to the inlet of a flowmeter, the outlet of which is connected to the suction side of a blower. Provision is made to control the voltage input to the blower motor, and thereby to control the air flow rate. A diaphragm-type valve is fitted to the inlet end of the flowmeter and is used, when nec

24、essary, to give fine adjustment of the airflow. From the side of the tube a connection is taken to an inclined manometer. The pressure differential indicated by the manometer shall be noted when the flow rate has been adjusted to200ml/s. The layout of the apparatus is shown inFigure 1. 4.2 Procedure

25、. The test is applied to any part, or parts, of the pillow, at the discretion of the testing authority. The flow rate is adjusted to200ml/s, and the pressure differential indicated by the manometer is measured and recorded. 5 Washing procedure The pillow shall be washed at a temperature of60 C and t

26、hen rinsed and dried, in accordance with the instructions of the pillow manufacturer. 1) A force of 10 newtons (10N) is approximately equivalent to the application of1Kilogram weight.BS4578:1970 2 BSI 08-1999 Figure 1 Layout for air permeability test on pillows3 blankBS 4578:1970 BSI 389 Chiswick Hi

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