1、 Testing principle:

GTR-3-BBreathability tester Using the principle of differential pressure testing, the pre processed sample is placed between the upper and lower testing chambers and clamped. 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, the gas will permeate from the high-pressure side to the low-pressure side under the action of the pressure gradient. By monitoring and processing the pressure inside the low-pressure side, various barrier parameters of the tested sample can be obtained

2、 Technical indicators:

l Measurement range:0.3~10000 cm3/（m2•24h•0.1Mpa）

l resolving power:0.01 cm3/（m2•24h•0.1Mpa）

l Temperature range:5℃~90℃

l Temperature control accuracy: ±0.01℃

l Vacuum resolution:0.1Pa

l Test chamber vacuum degree:<10pa

l Test pressure:0~200KPa

l Test gas:O2、CO2、N2etc.

l Sample thickness: ≤2mm

l Joint size:10mm

l Gas source pressure:0.2～0.8MPa

l Sample size: Φ70mmThrough the area38.48cm2

l Testeable quantity:3Item (expandable to multiple items)

l Number of sensors:3individual

l heavy Quantity: 60kg

l Gong Gong Rate:1000W

l electric Source:220V AC，50HZ

l External dimensions:800mm×560mm×400mm

3、 Expand applications:

Multiple different gases: suitable for permeability testing of various gases, such as oxygen, carbon dioxide, nitrogen, air, helium, etc

Flammable and explosive gases: suitable for testing the barrier performance of various films against flammable and explosive gases

Biodegradable film: used to test the breathability of biodegradable films, such as starch biodegradable bags, etc

Aerospace materials: used for gas permeability testing of aerospace materials, such as helium permeability testing of airship airbags

Paper and cardboard: used for breathability testing of composite materials such as paper and paper plastic, such as cigarette packaging aluminum foil, Tetra Pak packaging sheet, instant noodle paper bowls, disposable paper cups, etc

Paint film: Used for testing the breathability of paint films applied to substrates

Fiberglass cloth, fiberglass paper and other materials: suitable for breathability testing of fiberglass cloth, fiberglass paper and other materials, such as PTFE paint cloth, PTFE high-temperature cloth, fluorosilicone adhesive cloth, etc

Cosmetic hose sheet: suitable for gas permeability testing of various cosmetic hoses, aluminum-plastic tubes, and toothpaste tube sheets

Various rubber sheets: suitable for air permeability testing of various rubber sheets, such as air permeability testing of car tires

Four,GTR-3-BBreathability tester characteristic:

l Can simultaneously measure the gas permeability, solubility coefficient, and diffusion coefficient of the sample

l Three independent testing chambers can simultaneously test three identical or different samples

l Wide range, high-precision temperature and humidity control to meet various testing conditions

l Provide a proportional and fuzzy dual testing process judgment mode

l The testing range can be expanded as needed to meet the requirements of high transmittance testing

l Can perform data fitting at any temperature, easily obtaining experimental results under different conditions

l Support testing for toxic gases and flammable and explosive gases (requires modification)

l The system adopts computer control, and the entire experimental process is automatically completed

l Provide standard membranes for rapid calibration to ensure the accuracy and universality of detection data

l equipmentRS232Universal data interface, convenient for data transmission