GB/T 7755-2003
Rubber,vulcanized or thermoplastic--Determination of permeability to gases (English Version)

Standard No.

GB/T 7755-2003

Language

Chinese, Available in English version

Release Date

2003

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2019-04

Replace By

GB/T 7755.1-2018

Latest

GB/T 7755.1-2018

Replace

GB/T 7756-1987 GB/T 7755-1987

Scope

This standard specifies two methods for determining the air permeability of vulcanized or thermoplastic rubber under stable conditions. One method is to use a level measuring device to measure under constant pressure. Another method is to use a vertical measuring device for determination under constant volume or constant pressure. As long as the rubber is homogeneous and isotropic, the results obtained by these methods can be extrapolated to compounds of different thickness than the specimen. This method is suitable for dense rubber with a hardness not less than 35 IRHD and gaseous media such as air, nitrogen, oxygen, hydrogen, liquefied petroleum gas and coal gas. Experimental error will arise if the gas used causes the rubber to swell significantly during the test.

GB/T 7755-2003 history

• 2018 GB/T 7755.1-2018 Rubber,vulcanized or thermoplastic—Determination of permeability to gases—Part 1:Differential-pressure methods
• 2003 GB/T 7755-2003 Rubber,vulcanized or thermoplastic--Determination of permeability to gases
• 1987 GB/T 7755-1987 Rubber, vulcanized--Determination of permeability to gases--Constant volume method

GB/T 7755-2003 Rubber,vulcanized or thermoplastic--Determination of permeability to gases has been changed from GB/T 7756-1987 Rubber--vulcanized--Determination of permeability to gases--Constant pressure method.