Functional use

The water vapor transmission rate tester is suitable for food, pharmaceutical, electronics, daily chemical and other packaging materials, such as: high barrier film, co-extruded film, aluminum foil, aluminized film, infusion bag, sheet, coated film, solar back sheet , Cellophane, ceramic flakes; also suitable for water vapor transmission barrier testing of bottles, bags, cans and other containers.

Working principle

Use infrared sensor method to test the principle. The pre-processed sample is fixed in the middle of the test chamber, and the test chamber is divided into two upper and lower chambers. Nitrogen with relatively stable humidity flows in the upper chamber of the film, and dry nitrogen flows in the lower chamber. Due to the existence of a humidity gradient, water vapor It will diffuse from the high-humidity cavity through the thin film to the low-humidity cavity; the water vapor that passes through the sample is carried to the infrared sensor by the flowing dry nitrogen, and the parameters such as the water vapor transmission rate of the sample are obtained from the electrical signal output by the sensor. For packaging containers, dry nitrogen flows inside the container, and the outside of the container is in a high humidity state.

Standards compliant

ISO 15106-2、 ASTM F1249、 TAPPI T557、 JIS K7129、GB/T26253

Technical Parameters

Features

◆ Temperature control: It adopts international advanced electromagnetic temperature control technology and program step temperature control method, which can automatically control the temperature rise and fall without external accessories.

◆ Humidity control: The dual airflow humidity method is used to control a wide range of humidity, high accuracy, and stable humidity flow, avoiding the disadvantages of large volume and many failures caused by external humidity.

◆ The instrument has two calibration methods: standard gas calibration and standard membrane calibration. The industry only passed the national standard gas certification, and the data accuracy can be compared with national laboratories.

◆ Automatic judgment and automatic shutdown.

◆ A variety of automatic protection functions: out-of-range test, automatic saving of power failure data, misoperation prompts, etc.

◆ The software is easy to operate and the testing process is fully automatic. The transmission curve, water vapor concentration, humidity, temperature and other parameter curves are automatically recorded and continuously displayed. Can monitor the interaction between parameters and monitor the entire test process.

◆ The functions are modular, and the functions of setting, testing, baseline, calibration, and reporting are independent of each other. Good data analysis capabilities and easy operation.

◆ Quick test function, suitable for product evaluation test.

◆ Built-in independent running system, can run independent testing without computer.

◆ The host can be connected to USB for software upgrade, data backup and fault diagnosis.

◆ The two test chambers can independently and cross test two different samples to achieve efficient testing.