This article is provided by Jinan Saicheng Electronic Technology Co., Ltd

The carbon dioxide permeability tester plays an irreplaceable role in various fields such as packaging, medicine, agriculture, construction, and automobiles. Carbon dioxide is commonly used for food preservation (such as modified atmosphere packaging) and inhibits microbial growth by displacing oxygen. If the carbon dioxide transmission rate of packaging materials is too high, it will cause an imbalance in the gas composition inside the packaging, accelerating food oxidation and spoilage.

1、 Equipment Introduction

Based on the testing principle of pressure difference method, it is a professional gas permeability tester for thin film samples, suitable for measuring the gas permeability and gas permeability coefficient of plastic films, composite films, high barrier materials, sheets, and metal foils at various temperatures.

2、 Working principle

The instrument adopts the principle of differential pressure testing, placing the pre processed sample between the upper and lower testing chambers and clamping it. Firstly, perform vacuum treatment on the low-pressure chamber (lower chamber), and then evacuate the entire system; After reaching the specified vacuum degree, close the lower chamber of the test, fill the high-pressure chamber (upper chamber) with a certain pressure of test gas, and ensure that a constant pressure difference (adjustable) is formed on both sides of the sample; In this way, gas will permeate from the high-pressure side to the low-pressure side under the action of pressure gradient. By monitoring and processing the pressure inside the low-pressure side, various barrier parameters of the tested sample can be obtained.

三、重要性

Baked goods: Carbon dioxide leakage may cause packaging collapse, affecting product appearance and taste.

Screening low transmittance materials through testing equipment can extend the shelf life of food and reduce waste.

Requirements for barrier performance of packaging materials for drugs. Excessive carbon dioxide permeability may lead to the exchange of drugs with external gases, resulting in reduced efficacy or deterioration. For example:

Biological agents: It is necessary to strictly isolate gases such as carbon dioxide to prevent protein denaturation.

Bubble wrap packaging: If the moisture permeability of the aluminum foil composite film exceeds the standard, it may cause the tablets to become damp.

The tester can ensure that packaging materials comply with pharmacopoeia standards (such as YBB00092003-2015), ensuring drug safety.