ISO 5423:1992 pdf download.Moulded plastics footwear一Lined or unlined polyurethane boots for general industrial use一Specification
I Scope
ISO 5423:1992 pdf download specifies requirements for boots. moulded from polyurethane compound, (or 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 publication, the editions Indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 37:1977, Rubber, vulcanized — Determination of tensile stress-strain properties.
ISO 48:1979, Vulcanized rubbers — Determination of hardness (Hardness between 30 and 85 IRHD).
ISO 458-1:1985, Plastics — Determination of stiffness in torsion of flexible materials — Part 1; General method.
1SO/R 463:1965. Dial gauges reading in 0.01 mm. O.%1 In and o.cii I in.
Iso 471:1983, Rubber — Standard temperatures, humidities and times for the conditioning and testing of lest pieces.
ISO 10335:1990, Rubber and plastics footwear — Nomencla lure.
5.1 General
Materials from the upper and material from the sole shall be tested as Iwo separate compounds, even if the boot is known to have been made by a single injection process. Test pieces from the material of the boot shall be prepared by any of the permitted procedures given In ISO 37.
5.2 Resistanc. to flexing of boot upper
When tested In accordance with the method described in annex B with one test piece in each direction of flexing, no cracking of the types specified In annex B shall occur in either during 150000 flex cycles.
5.3 Tensfle properties
The modulus at 100 % elongation and the elongation at break of the upper and the soling shall be determined In accordance with the method described in ISO 37 at 23 C ± 2 C, using where predicable type I dumb-bell test pieces taken from the product.
The direction of test shall be along the sole and up the leg. If it is necessary, because of the shortage of material, to use the smaller, type 2. dumb-bell test piece, the size of the dumb-bell used shall be stated when expressing results.
Where practicable, test pieces shall be 2,0 mm ± 0,2 mm thick; If necessary, In order to ensure that no fabric is Included In the test pieces, thinner test pieces shall be used, and the thickness used shall be stated when expressing results.ISO 5423 pdf download.