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sklademVydáno: 2018-08-22
BS ISO 48-8:2018
Rubber, vulcanized or thermoplastic. Determination of hardness Apparent hardness of rubber-covered rollers by Pusey and Jones method
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| Označení normy: | BS ISO 48-8:2018 |
| Počet stran: | 18 |
| Vydáno: | 2018-08-22 |
| ISBN: | 978 0 580 99966 6 |
| Status: | Standard |
Popis
BS ISO 48-8:2018
This standard BS ISO 48-8:2018 Rubber, vulcanized or thermoplastic. Determination of hardness is classified in these ICS categories:
- 83.140.99 Other rubber and plastics products
This document specifies a method for the determination of the apparent hardness of vulcanized- or thermoplastic-rubber roller covers, expressed as the Pusey and Jones indentation value.
The Pusey and Jones plastometer apparatus is used to measure the depth of indentation of an indentor under a specified force into the surface of the rubber. The indentation value is not the same as that measured by the international rubber hardness test method ISO 48‑2, since in this method the rubber immediately adjacent to the indentor is precompressed. The Pusey and Jones indentation value is an inverse measurement of hardness, i.e. the harder the rubber the lower the Pusey and Jones indentation value.