GB/T 39693.8-2022 Active National standards

GB/T 39693.8-2022 Rubber,vulcanized or thermoplastic—Determination of hardness—Part 8:Apparent hardness of rubber-covered rollers by Pusey and Jones method

Publish Date: 2022-12-30 Implement Date: 2023-04-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 39693.8-2022

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Other rubber products

ICS Name: Other rubber and plastic products

Publish Date: 2022-12-30

Implement Date: 2023-04-01

Pages: 10 pages

Scope

This document describes the method for determining the apparent hardness of vulcanized rubber or thermoplastic rubber-coated rollers [expressed in terms of the P&J indentation value].
The P&J hardness tester is used to measure the depth of the indentation formed in the rubber surface under rated pressure. The indentation value differs from the measurement value of the International Rubber Hardness Method ISO 48-2[1], in which the rubber immediately adjacent to the indenter is pre-compressed. The P&J indentation value is a reverse measurement of hardness, meaning that the harder the rubber is, the lower the P&J indentation value will be. [1] ISO 48-2: This is a standard for measuring the hardness of rubber. It is a method in which the rubber is pre-compressed immediately adjacent to the indenter, and the indentation depth formed by the indenter under a specified pressure is measured.