Bentsen permeability tester Bentsen method paper permeability tester

Bentsen permeability tester is a professional equipment used to evaluate the permeability performance of materials. It quantifies the permeability of materials by measuring the rate or flow rate of gas penetrating the material under a specific pressure difference. It is widely used in fields such as paper, film, textiles, building materials, automotive interiors, and medical supplies.

1、 Testing principle

Core mechanism:

Based on the airflow pressure difference method, a fixed pressure difference is formed on both sides of the sample, and the air volume or required time passing through the sample per unit time is detected by a high-precision flow sensor to calculate the air permeability.

Key steps:

Differential pressure control: Maintain a constant differential pressure through a vacuum pump or regulator valve, simulating the actual usage environment of the material.

Flow measurement: Use thermal mass flowmeter or float flowmeter to ensure data accuracy.

Data collection: Dual channel synchronous recording of pressure difference and flow rate, generating pressure flow curve, supporting comparative analysis of multiple sets of data.

2、 Characteristics

High precision and versatility:

Supports dual modes of constant pressure difference and constant flow rate, suitable for different testing scenarios.

Integrated pulse airflow simulation function to evaluate the stability of materials in dynamic airflow.

Intelligent operation:

The touch screen supports bilingual testing in both Chinese and English, with graphical guidance for the testing process.

Specialized software automatically calculates air permeability, generates detailed reports and charts, and supports data export and printing.

Environmental adaptability:

Support testing of different gas sources such as nitrogen and air to evaluate the selective permeability of materials to specific gases.

Safety and durability:

The double-layer sealed test chamber adopts food grade silicone rings to prevent gas leakage; The overvoltage protection device automatically releases pressure when the pressure difference exceeds Xian.

The core component life warning function reduces the risk of unexpected downtime.

3、 Application Fields

Packaging industry:

Test the breathability of plastic bags, cardboard, and film to ensure the preservation quality of products such as food and medicine.

Textiles and non-woven fabrics:

Evaluate the breathability of masks, protective fu, and gauze, balancing protective performance with wearing comfort.

building material:

Check the breathability of insulation and waterproof materials to prevent moisture or mold from affecting the structure.

Automotive industry:

Test the breathability of interior materials and air filters, optimize the air quality inside the car and engine efficiency.

Medical field:

Evaluate the breathability of surgical fu and dialysis membranes to ensure functionality and safety.

Battery industry:

Test the breathability of battery separators to prevent short circuits or thermal runaway.