GB/T 7756-1987
Rubber--vulcanized--Determination of permeability to gases--Constant pressure method (English Version)

Standard No.

GB/T 7756-1987

Language

Chinese, Available in English version

Release Date

1987

Published By

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

Status

Be replaced 2004-02

Replace By

GB/T 7755-2003

Latest

GB/T 7755.1-2018

Scope

This standard applies to the determination of the gas permeability of vulcanized rubber with a hardness not less than 35 IRHD. The gas used should not swell or corrode the rubber. This standard provides a basic method for determining the air permeability of the test specimen under stable conditions of constant pressure on each end face. Results obtained by this method shall not be extrapolated to materials of significantly different thickness than the specimen.

GB/T 7756-1987 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 7756-1987 Rubber--vulcanized--Determination of permeability to gases--Constant pressure method

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