Permeability tester VAC-V1 (EX)

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Overview VAC-V1 (EX) is a laboratory gas permeability tester using the differential-pressure method for professional determination of gas transmission rate, solubility coefficient, diffusion coefficient and permeability coefficient of films, composite films, high-barrier materials, sheets and foils. It supports tests with common gases and with flammable, explosive or toxic gases under controlled temperatures.

Product Features

• Split-control architecture separates mainframe and control module to enhance operator safety during tests.
• Designed for permeability testing with flammable, explosive or toxic gases.
• Simultaneous determination of gas transmission rate, permeability, solubility and diffusion coefficients.
• Wide-range, high-precision liquid-circulation temperature controller for tests at 5℃–95℃ (±0.1℃).
• Two test-process judgment modes: Proportional Mode and Fuzzy Mode for flexible data processing.
• Expandable test range to accommodate high-permeability materials.
• Temperature-based data fitting to derive results at varied or extreme conditions.
• PC-controlled operation for automated test sequences and data handling.
• Reference film provided for rapid calibration and traceable results.
• RS232 data port and compatibility with Lystem™ Lab Data Sharing System for centralized result management.

Principle The instrument uses the differential-pressure method: a preconditioned sample is clamped between an upper (higher-pressure) and a lower (lower-pressure/vacuum) chamber. The lower chamber is evacuated, then isolated, and test gas is introduced to the upper chamber at a set pressure to form a constant pressure difference. Gas permeates from high to low pressure; monitoring pressure changes in the lower chamber yields permeability data.

Standards Conforms to relevant national and international standards: ISO 15105-1, ISO 2556, GB/T 1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003.

Applications

• Films: Plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils and aluminum-composite films.
• Sheeting: Engineering plastics, rubber, construction sheets (e.g. PP, PVC, PVDC).
• Various gases: O2, CO2, N2, air, He, H2 (gas supply by user).
• Inflammable/explosive/toxic gases: Permeability testing for hazardous gases.
• Biodegradable films: e.g. starch-based packaging films.
• Aerospace materials: Helium permeability testing for airship gas bags and similar components.
• Paper & board: Aluminized paper, Tetra Pak sheets, disposable paper containers.
• Coated substrates: Paint and coating films on substrates.
• Textiles & glass-fiber materials: Teflon-coated cloths, welding fabrics, glass-fiber papers.
• Cosmetic & toothpaste tubes: Aluminum-plastic tubes and other laminate tubes.
• Rubber sheets: e.g. tire materials.

Configurations

• Standard: Mainframe, thermostatic (liquid) controller, PC, professional software, professional sampler, vacuum grease, quick quantitative filter paper, vacuum pump.
• Optional: Sampling blades, additional vacuum grease, vacuum pump oil, spare filter paper.
• Note: Gas inlet port = Φ6 mm PU tubing. Gas sources and distilled water must be supplied by the user.

Technical specifications

• Test range (film): 0.05 ~ 50,000 cm3/m2·24h·0.1MPa (standard); upper limit ≥ 500,000 cm3/m2·24h·0.1MPa (extended).
• Number of specimens: 1.
• Vacuum resolution: 0.1 Pa.
• Vacuum degree of test chamber: <10 Pa.
• Temperature range: 5℃ ～ 95℃; accuracy ±0.1℃.
• Specimen size: Φ97 mm; test area: 38.48 cm2 (Φ70 mm).
• Test gases: H2, O2, N2, CO2 (user-supplied).
• Test pressure: 10 kPa ~ 200 kPa (standard).
• Gas supply pressure: 0.5 MPa ~ 0.6 MPa.
• Port size: Φ6 mm PU tubing.
• Dimensions (L×W×H): 500 × 575 × 450 mm.
• Power supply: 220 VAC 50 Hz.
• Net weight: 50 kg.