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OVERVIEW

Equipment Summary:

Water Vapor Transmission Rate Tester is a professional, high-efficiency and intelligent testing instrument, which is applicable to determination of water vapor transmission rate of plastic films, composite films and various packaging materials used in medical and construction industries, etc.

Basic Applications

• Films
  • Including plastic films, plastic composite films, paper-plastic composite films, geomembranes, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, breathable waterproof films and many others
• Sheeting
  • Including engineering plastics, rubber and building materials, e.g. PP, PVC and PVDC

• Paper and Paper Board
  • Including paper and paper board, e.g. aluminum foil paper for cigarette packages and Tetra Pak materials
• Textiles and Nonwovens
  • Including textiles and non-woven materials, e.g. waterproof breathable fabric, non-woven fabric for diapers and hygienic products

Extended Applications

• Inverted Cup Method
  • Mount film or sheeting in test dish, cover upper surface of specimen with distilled water, and make the lower side in certain humidity. Generate a constant humidity difference between two sides; water vapor permeates through specimen and measure weight changes in different time to obtain the water vapor transmission rate. NOTE: inverted cups are required
• Artificial Skin
  • Artificial skin has to meet standard requirements for water vapor transmission rate to ensure better breath performance. This instrument can be used to test water vapor permeability of artificial skin
• Medical Products and Accessories
  • Including plasters, aseptic wound protecting films, face masks and scar sticks
• Solar Back-Sheets
  • Including solar back-sheets
• LCD Monitor Films
  • Including LCD monitor films
• Paint Films
  • Test water vapor permeability of various sorts of paint films
• Cosmetics
  • Test water vapor permeability of cosmetics
• Biodegradable Films
  • Test water vapor permeability of various sorts of biodegradable films, e.g. starch-based packaging films

Test Principle:

Under a certain test temperature, a constant humidity difference is generated between two sides of the test specimen. The water vapor permeates through the specimen and into the dry side. By measuring the weight changes of the test dish in different time, water vapor transmission rate and other parameters can be obtained.

Test Standards:

ISO 2528, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 00092003

Features:

This instrument is based on the cup method and professionally applicable to the water vapor transmission rate test of film specimens. The test accuracy of WVTR can reach 0.1g/m2·24h. It is equipped with high resolution sensor, which also provides excellent test sensitivity.

 Wide range and high-precision of automatic temperature and humidity control to support various combinations of non-standard test conditions

 Standard air velocity enables constant humidity difference between two sides of test dishes

 Automatic reset before weighing ensures accurate weighing data

 Gas cylinder lifting structure design and periodically weighing method to reduce system errors

 Convenient fast-access calibration ports for temperature and humidity

 Reference film or standard weight for fast and accurate calibration

 Precision mechanical design not only ensures the system's ultra-high precision, but also greatly improves the test efficiency.

 6 distinct or equivalent specimens can be tested individually with independent test results at one operation

 Based on the user-friendly Windows operating interface for easy operation

 Saves test data in different formats for convenient data transfer

 Intelligent historical data searching, comparing, analyzing and printing functions