Sealing Tape - Testing Seams With En343

There are few products in the world that are flawless and without fail

. Garment production, even through the use of machines, still has human influence and with that influence comes error. When waterproofing garments fail, it's often in the seams and is a result of failing sealing tape or bad stitching. With professional garments, these failures can put professional at risk. To minimize this and ensure that garments boasting waterproofing meet specific standards, professional clothing is tested to EN343 standards for both waterproofing and breathability.

EN343 is designed to set standards and requirements for testing the seams of clothing where those garments are intended to repel and prevent moisture from seeping through. Garments designed to be waterproof typically use some kind of bonding material or sealing tape in the seams where thread punctures the waterproofed fabric, so it's necessary to test these regions for compliance and performance.

Garments are testing in multiple areas according to EN standards. These vary depending on the garment but can include things like washability (domestic and industrial), tensile strength, durability, fire proofing, etc. Each area tested is represented by a pictogram on the label. In the case of EN343, the pictogram is an umbrella with water running off the side. Next to the umbrella are two values, an X and a Y value. These represent the waterproofing and breathability classification of the garment.

On the pictogram, the X value represents the overall waterproofing of the seams on a garment. This value is broken into three classifications to show how well the garment performs. The lowest score is 1, representing the least amount of protection. The highest and most waterproofing protection of the garment and sealing tape is represented by a 3. To test for this value, facilities apply pressurized water to the garment to see how much water transfers.

The Y value, like the X value, is also broken into three classifications. This Y value rates breathability of the fabric on a 1 to 3 scale, with 1 representing the poorest breathability and three representing the best breathability in a safety garment or waterproof garment. When tested, facilities are able to determine how long these garments can be worn before the sealing tape and other performance factors begin to fail, resulting in moisture passage.

This standard of testing is extremely important in the manufacture of professional clothing. While garments worn to keep out common moisture like rain or mist pose little threat to a professional worker, those who work around hazardous liquids need to rely on the sealing tape and waterproofing of the garments they wear.

Learn more about seam seal tape at LoxyTapes.com

The standard of testing used for verification of waterproofing means a great deal to those who expose themselves every day to harmful chemicals, biohazards, corrosive liquids and other liquids. Rigorous testing for the durability of sealing tape and other waterproofing performance in safety garments is the best way to keep workers safe and out of harm in professional environments.

by: henry e lopez

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