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Home / Articles and Press Releases / Press Release / How to Evaluate Coverall’s Chemical Resistance

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Press Release

How to Evaluate Coverall’s Chemical Resistance

By Derekduck Industries Corp.

| Read Bio

Published: July 31st, 2017

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When workplace involves chemical risks, the most concerned question is “ Can this protective clothing protect us from the specific chemical? “, such as Sulphuric Acid, Acetone, etc. However, for a professional safety consultant, it is not a simple YES or NO question. Consumers should check the chemical permeation test result of the technical data sheet offered from manufacturers.

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WHAT is permeation?

Permeation is the process when a potential hazard chemical passes through a material on a molecular diffusion. Although there aren’t any holes visible to naked eyes, there are still possibilities for chemical molecules to permeate through the fabric.

How to conduct the chemical permeation examination?

There is a specific machine to detect the chemical permeate through the sample fabric. The processes can be simplified as follow:

1. Put the sample protective clothing fabric between the testing chambers.

2. Expose the outer surface of the fabric to the hazardous chemical.

3. Start analyze the inner surface of the fabric to determine if any chemical passes through the fabric and the amount of chemical.

*The exposure emulates total and constant of the immersion condition.

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Chemical permeation test method

EU has recommended the following test methods:

1.EN 374-3: 2003 record the lowest BT and specifies a normalized permeation rate of 1.0 µg / cm2 / min.

2.ISO 6529: 2001 (method A and B) specifies the mean BT to be reported at the normalized permeation rate of 1.0 µg/cm2/min or 0.1 µg/ cm2 / min.

Test result of chemical permeation resistance

There are two crucial parameters on the technical data sheet, PR and BT. They help us to classify the protection level of the sample fabric.

Permeation rate (PR) indicates the mass of the chemical in micrograms, which can be transferred through µg/cm2/min.

Breakthrough time (BT) is the elapsed time between first exposure of the fabric to chemical and the rate of permeation reaching a target value. When measured according to a standard method, the performance of the breakthrough time is a value by which different fabrics can be equitably compared.

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Performance Classified by EN 14325

In Europe standard (as specified in EN 14325:2004) the result is classified into 6 classes based on the normalized breakthrough time(BT) is recorded at the permeation rate of 1.0µg/cm2/min.

Chemical permeation of ULTITEC 4000

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ULTITEC 4000 has passed more than dozens of chemicals, you can check the list or contact with our professional team: [email protected]

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ABOUT THE AUTHOR

Derekduck Industries Corp.

DEREKDUCK, established since 1992, has been devoting itself to the innovation, R&D and manufacture of nonwoven and introducing its products worldwide, so as be a pioneer in nonwoven industry in Taiwan. The products supplied, ranging from nonwoven related commodities for industrial, medical and consumer applications, cover three categories. By professional integrative capability, Derekduck offers hi-tech designed and shielding solutions to diverse customers to satisfy every need of public safety and medical protection.

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