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ISO 3385:2014 pdf free

ISO 3385:2014 pdf free.Flexible cellular polymeric materials一Determination of fatigue by constant-load pounding
ISO 3385 specifies a method for the determination of loss in thickness and loss in hardness of flexible cellular materials intended for use in load-bearing applications such as upholstery.
It provides a means of assessing the service performance of flexible cellular materials based on rubber latex or polyurethane used in load-bearing upholstery.
The method is applicable both to standard size test pieces cut from slabstock material and to shaped components. The measured loss in thickness and loss in hardness are related to, but are not necessarily the same as, the losses likely to occur in service.
ISO 3385 is not intended to function as a detailed engineering design specification for fatigue apparatus.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2439:2008, Flexible cllular polymeric materials一Determination of hardness (indentation technique)
Repeated indentation of a test piece by an indentor smaller in area than the test piece, the maximum load reached during each cycle being kept within specified limits. The typical loading cycle is shown in Figure A.1
Machine Type A, in its simplest form the mechanism comprises a crank drive and suspended weight. The weight shall be supported throughout the loading cycle except at that part of the stroke when the mounting and platen are closest together. At this point, the full force of the indentor shall be supported by the test piece; this shall not be for more than 10 % of the full machine cycle. This type of device is shown schematically in Figure 1 a) and Figure 1 b). The moving platen (5) shall be ftted with appropriate means to locate the test piece and prevent its lateral movement during the test.ISO 3385 pdf download.

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