IS0 5423:1992 pdf download – Moulded plastics footwear – Lined or unlined polyurethane boots for general industrial use – Specification.
1 Scope This International Standard specifies requirements for boots, moulded from polyurethane compound, for general industrial use. The boots may be either fabric-lined or unlined and of any style from ankle boots to full thigh height inclusive. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- dicated below. Members of IEC and IS0 maintain registers of currently valid International Standards, IS0 37:1977, Rubber, vulcanized – Determihation of tensile stress-strain properties. IS0 48:1979, Vulcanized rubbers – Determination of hardness (Hardness between 30 and 85 IRHD). IS0 45%1:1985, Plastics – Determination of stiffness in torsion of i7exible materials – Part 1: Genera/ method. ISO/R 463:1965, Dial gauges reading in 0.01 mm, 0.001 in and 0.000 1 in. IS0 471:1983, Rubber – Standard temperatures, hu- midities and times fof the conditioning and testing of test pieces. IS0 10335:1990, Rubber and plastics footwear – No- menclature.
3 Definitions For the purposes of this International Standard, the definitions given in IS0 1 0335 apply. 4 Design requirements NOTE 1 Suggested ranges for the heights of boots are given in annex F. 4.1 Soling pattern The soling shall have radiused corners at the base of the sole pattern and the radius for such corners shall be not less than I,5 mm. NOTE 2 The pattern of the soling can have a significant effect on the formation of premature cracks. 4.2 Minimum thicknesses The minimum thicknesses of the boot shall be in accordance with table 1 for each individual value obtained when measured as described in annex A. 4.3 Materlals and components The upper, soling and heel shall be moulded from homogeneously mixed polyurethane compound. It may be cellular or a combination of cellular and non-cellular.