ASTM E96 Gravimetric Determination of Water Vapor Transmission Rate of Materials

ASTM E96 is a test method that determines the water vapor transmission rate requirements to which materials including films, coatings, and textiles shall conform. The desirable transmission rates and permeability characteristics are calculated during processing.

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Introduction to ASTM E96

ASTM E96 is a standard test method used to determine the water vapor transmission rate (WVTR) and moisture vapor permeability of various materials, including films, coatings, and textiles. This method helps assess the quality of materials by measuring their ability to resist moisture penetration. The test is commonly used in industries such as packaging, construction, and textiles. The results obtained through this method are especially used for quality control, reliability check, performance evaluation, and specification purposes.

ASTM E96 is an important test method used to evaluate the ability of materials to resist moisture penetration. The WVTR and moisture vapor permeability of materials are critical factors in the performance of products in industries such as packaging, construction, and textiles. The test provides valuable information for quality control and product development, and it is used in conjunction with other ASTM standards to fully evaluate the properties of various materials, including films, coatings, and textiles. The final values of the procedure are stated in standard units of SI. 

ASTM E96 Test Method

The test method ASTM E96 involves measuring the weight gain of a test specimen over a specified period of time while exposed to a constant temperature and humidity. The test is performed in two modes: the desiccant method and the water method. Both methods are used to calculate the water vapor transmission rate and moisture vapor permeability of the specimen.

Desiccant MethodIn the desiccant method, the specimen is placed in a test cell with a desiccant, and the weight gain of the desiccant is measured over time.
Water MethodIn the water method, the specimen is placed in a test cell that is filled with water, and the weight loss of the water is measured over time.

ASTM E96 Specimens

Specimen detailsSpecimen details for ASTM E96 vary depending on the type of material being tested. For films and coatings, the specimen is typically a square or circular sample with a specified area. For textiles, the specimen is a piece of fabric with a specified weight and thickness.
Specimen dimensionsASTM E96 has specified ranges for the area of the coatings and weight and thickness of the fabric.
Specimen preparationSpecimens are conditioned before testing to ensure they are at a consistent temperature and humidity.

ASTM E96 Results

The results of the ASTM E96 test method are reported as the water vapor transmission rate and moisture vapor permeability of the specimen. The water vapor transmission rate is reported in units of grams per square meter per day (g/m²/day) or grains per square foot per day (gr/ft²/day). The moisture vapor permeability is reported in units of perms (permeability) or ng/(Pa•s•m²).

Tests related to ASTM E96

ASTM E96 is related to several other ASTM standards that measure the properties of materials related to moisture and air. These standards include ASTM D1653 for water vapor transmission of organic coatings, ASTM D1434 for determining gas permeability of plastics, and ASTM D3574 for flexible cellular materials.

FAQ's

Where can I get the astm e96 tested?

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How much do I need to pay for the astm e96 test?

Please contact us for a detailed quote for your astm e96 testing needs. Cost incurred to carry out different astm e96 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.

How many samples are required for astm e96?

The required number of samples or specimens should comply with the procedure given in the astm e96 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.

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How many days will it take to complete the astm e96 test?

The turnaround time for astm e96 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.

Where can I get the astm e96 tested?

You can share your astm e96 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e96 test to various testing techniques.

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