GB/T 40260-2021 in English

VALID

Test method for determining gas permeability of polymer membrane materials

Issued on:2021-05-21
Implemented on:2021-12-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
$243.00

Standard No:	GB/T 40260-2021
Document status:	VALID
Title in English:	Test method for determining gas permeability of polymer membrane materials
Title in Chinese:	高分子膜材料气体渗透性能测试方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2021-05-21
Implemented on:	2021-12-01
Professional Classification:	GB-National Standard
Related Topics:	molecular Polymer membrane material penetration gas permeation gas permeability gas semipermeable material semi-permeable material Polymer Materials gas molecule gas permeability Test method for fabric permeability Material permeability measurement Performance test method of pervaporation permeable membrane high performance gas phase gas pressure test polymer film Air permeability tester polymer material high temperature gas permeability Gas Permeability Test high energy osmotic pressure gas permeability of the material Polymer Material Analysis membrane material Polymer material testing machine polymer material analysis and Classification of membrane materials Breathable film machine molecular material performance test english Polymer material dsc peak molecular english Polymer Test Method molecular membrane exudate material method Membrane material classification gas molecule New membrane materials can efficiently Penetration Standard polymer membrane method polymer method Organic material performance test method Temperament high energy Wave-transparent material testing molecular material high performance film DSC and polymer materials high performance film Polymer Material Analysis Forward osmosis membrane Test method for fabric permeability DSC Polymer Materials material gas Polymer material sample preparation method Sample Preparation Methods of Polymer Materials semipermeable membrane molecular gas Polymer gas phase detection performance test english polymer film Hot-pressed film polymer Material Electronic Capabilities Polymer material test method performance test english Polymer detection method What method is used for polymer materials t film molecular membrane Made of polymer material Detection methods of polymer materials Polymer material detection method molecular version polymer sample GBT40260 GB/T 40260-2021 Transmittance range table of coating materials Film-forming performance measurement method Breathable membrane test calibration method Experimental method for testing air permeability of breathable membranes Test method for long-term permeability coefficient of materials High pressure housing impregnation Penetration testing requirements A brief analysis of osmotic pressure measurement methods Forward osmosis membrane national standard Osmotic pressure measurement method Pipe ion permeability test Permeability measurement method Test method for air permeability of breathable membranes Methods for Measuring Membrane Permeability Electrical performance testing coatings Membrane permeability measurement method A method for determining the permeability coefficient of bulk materials Pesticide Penetration Determination Method

《GB/T 40260-2021高分子膜材料气体渗透性能测试方法》由TC382（全国分离膜标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Analysis of the core content of the standard

Polymer homogeneous dense membrane is defined as a non-porous membrane made of polymer materials with a uniform structure. The gas permeability performance test must follow the dissolution-diffusion mechanism.

Key Test Parameter System

Parameter	Symbol	Unit	Test Significance
Gas Permeability Coefficient	P	cm³·cm/(cm²·s·MPa)	Characterizes Gas Permeability
Gas Diffusion Coefficient	D	cm²/s	Reflects Molecular Migration Rate
Gas Solubility Coefficient	S	cm³/cm³·MPa	Characterizes Solubility

Key requirements for test instruments

Gas permeability tester must meet the following requirements:

Vacuum gauge accuracy 0.2%FS
Permeation cell design pressure 6.0MPa
Helium leakage rate ≤4.04×10⁻¹⁰Pa·m³/s

Analysis of standard technology evolution

Compared with earlier test methods, this standard innovatively:

Clearly distinguishes the calculation methods of the three coefficients (P, D, S)
Specifies the selection conditions of the buffer tank (enabled when testing high permeability samples)
Refine sample pretreatment requirements (dryer storage ≥48h)

Implementation suggestions

Key points of operation

The average value of 10 different positions should be taken for sample thickness measurement
System vacuum degassing time ≥24 hours
Test temperature fluctuation should be controlled within ±0.5℃

Error control

It is recommended to use standard film for regular calibration:
1. Volume V1/V2 of the lower side of the sample
2. System airtightness (vacuum degree ≤4Pa)

More samples: DL/T 5154-2012 NB/T 47013.2-2015 GB 50021-2001(2009)

Sample only — not a preview of GB/T 40260-2021

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