Gas permeability tester VAC-V2

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Overview
VAC-V2 uses the differential‑pressure method to measure gas transmission rate and to determine solubility, diffusion and permeability coefficients of plastic films, composite films, high‑barrier materials, sheets and aluminum foils. The system is designed for laboratory and quality‑control use where reproducible barrier data are required.

Product Features

• Single‑run measurement of gas transmission rate, solubility coefficient, diffusion coefficient and permeability coefficient
• Three independent specimen chambers provide separate results for up to three different or equivalent samples in one operation
• Wide range and high‑precision temperature (5–95°C) and humidity control to match diverse test conditions
• Two test modes: proportional mode and standard mode to suit different measurement strategies
• Extendable test range for materials with high permeability
• Data fitting function to obtain reliable results under extreme conditions and across temperatures
• Optional customization for testing toxic, flammable or explosive gases
• Computer‑controlled with automated test sequence and data logging
• Reference film for fast calibration and consistent, comparable results
• Standard RS232 port for data export and integration with laboratory systems
• Supports Lystem™ Lab Data Sharing System for central result and report management

Principle
The pre‑conditioned specimen is mounted and sealed between two chambers of a gas diffusion cell. The low‑pressure chamber is evacuated first and the entire cell is then evacuated. Test gas is introduced into the high‑pressure chamber to establish a constant pressure differential. Gas permeates through the specimen into the low‑pressure chamber; permeability and related coefficients are calculated from the monitored pressure changes in the low‑pressure chamber.

Standards

• ISO 15105-1
• ISO 2556
• GB/T 1038-2000
• ASTM D1434
• JIS K7126-1
• YBB 00082003

Applications

• Basic applications: Plastic films (single and composite), paper‑plastic laminates, co‑extruded films, metallized films, aluminum foils and similar membrane materials.
• Sheet materials: Engineering plastics, rubber sheets and building materials (e.g. PP, PVC, PVDC).
• Extended applications: Measurement of O2, CO2, N2, air and He permeability; testing of flammable/explosive gases (with customization); biodegradable films (starch‑based bags); aerospace materials (helium leakage of gas bags); paper and board laminates (Tetra Pak, metallized paper); coated substrates and paint films; glass‑fiber cloth and specialty fabrics; soft tubes for cosmetics and toothpaste; various rubber sheets including tire materials.

Technical Specifications

• Test range (film, standard): 0.05 ~ 50,000 cm3/m2·24h·0.1MPa; extended: ≥ 500,000 cm3/m2·24h·0.1MPa (optional)
• Number of specimens: 3 (independent results)
• Vacuum resolution: 0.1 Pa
• Test chamber vacuum: <20 Pa
• Temperature range: 5°C ~ 95°C; accuracy: ±0.1°C
• Humidity range: 0%RH, 5%RH ~ 90%RH (automatic humidification customizable at 15°C~40°C)
• Humidity accuracy: ±1%RH
• Specimen size: Φ97 mm; test area: 38.48 cm2
• Test gases: O2, N2, CO2 (supplied externally)
• Test pressure: 10 kPa ~ 200 kPa
• Gas supply pressure: 0.4 MPa ~ 0.6 MPa
• Port size: Φ6 mm PU tubing
• Dimensions: 760 mm (L) x 575 mm (W) x 450 mm (H)
• Power supply: 220VAC 50Hz / 120VAC 60Hz
• Net weight: 88 kg

Configurations & Notes
Standard scope: main instrument, constant‑temperature control device, professional software, round sample cutter, vacuum grease, fast quantitative filter paper and imported vacuum pump. Optional parts: spare blades, vacuum grease, vacuum pump oil, additional filter paper. Note: gas inlet is Φ6 mm PU tubing; customer provides gas supply and distilled water when required.