BS ISO 22843:2020 pdf free

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BS ISO 22843:2020 pdf free.Rubber bands – General requirements and test methods.
BS ISO 22843This document specifies general requirements and relevant test methods for rubber bands made of dry natural rubber used for general purposes such as for daily wrapping or packaging.This document is not applicable for cover rubber bands made of blend and synthetic rubbers. This document is not applicable for rubber bands used for engineering applications, for food contact, nor for medical uses.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 37, Rubber, vulcanized or thermoplastic一Determination of tensile stress-strain properties ISO 188, Rubber, vulcanized or thermoplastic一Accelerated ageing and heat resistance tests ISO 2781, Rubber, vulcanized or thermoplastic一Determination of density ISO 23529, Rubber一General procedures for preparing and conditioning test pieces for physical test methods. For cut-width, the measurements shall be made at four approximately equally spaced positions around the ring. Measure the cut-with to the nearest of 0,1 mm using suitable measuring devices e.g. vernier caliper, calibrated tape and magnifying microscope. The average value of each set of measurements shall be recorded. For thickness, the measurements shall be made at four approximately equally spaced positions around the ring. Measure the thickness to the nearest of 0,01 mm using a thickness gauge. The average value of each set of measurements shall be recorded.In some cases, the rubber bands can be cut or stacked before measuring the thickness. Other suitable measuring devices, e.g. magnifying microscope and force gauge, can be employed providing that their
accuracy are appropriate.BS ISO 22843 pdf download.

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