Pressure testing system VAC-V2

diffusionsolubilitypermeability

VAC-V2 is a differential-pressure laboratory instrument for precise determination of gas transmission rate and derived barrier properties (solubility coefficient, diffusion coefficient, permeability coefficient) of films, composite films, high-barrier materials, sheeting and aluminum foils.

Product features

• Measure gas transmission rate, solubility, diffusion and permeability coefficients in a single test.
• Three independent specimen positions allow simultaneous testing of distinct or equivalent samples with separate results.
• Wide-range, high-precision temperature (5°C–95°C, ±0.1°C) and humidity control (0%RH or 5%–90% RH; automatic humidification option at 15°C–40°C).
• Two test modes: proportional mode and standard mode; test range expandable for high-permeability materials.
• Data-fitting function for reliable evaluation at extreme conditions and across temperatures.
• Configurable to test toxic, flammable or explosive gases (customization required); RS232 port and computer-controlled automated sequences; Lystem™ Lab Data Sharing System support.
• Includes reference film for fast calibration.

Principle
The preconditioned specimen is mounted in a gas diffusion cell separating two chambers. The low-pressure chamber is evacuated, then gas is introduced into the high-pressure chamber to establish a constant pressure difference. Gas permeates through the specimen into the low-pressure chamber; permeability and derived coefficients are calculated by monitoring pressure change in the low chamber.

Standards

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

Applications

• Films
  Plastic films, composite films, paper-plastic composites, co-extruded films, aluminized films, aluminum foils and foil composites.
• Sheeting
  Engineering plastics, rubber and building materials (e.g. PP, PVC, PVDC).
• Gases
  O2, CO2, N2, air, He and others (user-supplied gases).
• Special cases
  Biodegradable films, painted/coated substrates, aeronautical materials (helium testing), cosmetic tubes, rubber sheets, paper and board packaging.

Technical specifications

• Test range (film): 0.05–50,000 cm3/m2·24h·0.1MPa (standard); expandable to ≥500,000 cm3/m2·24h·0.1MPa (extended).
• 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: 0%RH or 5%–90%RH; humidity accuracy ±1%RH; automatic humidification option (15°C–40°C).
• Specimen size: Φ97 mm; test area: 38.48 cm2.
• Test gases: O2, N2, CO2 (not supplied).
• Test pressure: 10–200 kPa; gas supply pressure: 0.4–0.6 MPa; port size: Φ6 mm PU tubing.
• Dimensions: 760 × 575 × 450 mm (L×W×H); power: 220 VAC 50 Hz / 120 VAC 60 Hz; net weight: 88 kg.
• Standard configuration: instrument, constant-temperature control device, professional software, round sample cutter, vacuum grease, quantitative filter paper, imported vacuum pump. Optional accessories available.
• Note: gas supply and distilled water must be prepared by the user; gas port uses Φ6 mm PU tubing.