ISO 5999 pdf download

ISO 5999 pdf download Flexible cellular polymeric materials — Polyurethane foam for load-bearing applications excluding carpet underlay — Specification
Scope
This International Standard specifies requirements for flexible load-bearing polyurethane foam of thepolyether type.
lt is applicable to flexible polyurethane cellular materials manufactured in block, sheet and strip form,in moulded and fabricated shapes, and as reconstituted material, used for load-bearing applicationsin general, but excluding carpet backing and underlay, lt, thus, primarily relates to the quality ofpolyurethane foam used for comfort cushioning purposes.
The foam is classified according to the type of foam, the performance during a fatigue test, and theindentation hardness index used as a means of grading materials.
This International Standard is not applicable to polyurethane foams foamed in place or to foams for usein heat-welded systems unless for load-bearing purposes.
Recommended applications for the range of flexible polyurethane foams covered by this InternationaStandard are listed in Annex A
2Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
ISO 845, Cellular plastics and rubbers – Determination ofapparent density
SO 1798, Flexible cellular polymeric materials — Determination oftensile strength and elongation at break
ISO 1856, Flexible cellular polymeric materials — Determination of compression set
ISO 1923, Cellular plastics and rubbers – Determination oflinear dimensions
ISO 2439:2008, Flexible cellular polymeric materials – Determination ofhardness (indentation technique)
ISO 2440, Flexible and rigid cellular polymeric materials — Accelerated ageing tests
ISO 3385, Flexible cellular polymeric materials — Determination of fatigue by constant-load pounding
SO 3582, Flexible cellular polymeric materials – Laboratory assessment of horizontal burningcharacteristics ofsmall specimens subjected to a small flame
ISO 3795,Road vehicles, and tractors and machinery for agriculture and forestry – Determination ofburning behaviour ofinterior materials
ISO 8307, Flexible cellular polymeric materials — Determination ofresilience by ball rebound
ISO 23529, Rubber– Generalprocedures for preparing and conditioning testpiecesforphysical testmethods
3 Classification
3.1 Type
For the purposes of this International Standard, flexible polyurethane foams are classified in accordance with Table 1.
3.2 Class
3.2.1 Materials of the types of foam listed in Table 1, except for type MM (see footnote b to Table 7) and RE (see footnote a to Table 8), are subdivided into five classes based on the performance in the constantload pounding test described in ISO 3385.
3.2.2 The five classes, their intended types of service and their intended hardness loss ratio are given in Table 2.