When carpet inspectors arrive at a job site, they often need to take fiber samples so they can conduct a range of tests, both in the field and back at their workplace. When inspectors need to do bundle wrap encapsulation and penetration, they must follow test protocol. It’s important to choose areas of carpet that comes as close as possible to the original state, such as a corner, carpet edge or area that is protected from traffic.
Proper Tuft Extraction is Key
In this field test, the carpet inspectors must get tufts removed from carpet backings for examination. The tricky part is they must do this without damaging the backcoating encapsulating the fiber bundle of yarn. Incorrectly removing tufts from the carpet can affect the test results. Carpet inspectors should take at least three test samples from along the full width of the carpet.
There are a few different procedures for removing tufts. The carpet inspector should always take from uninstalled carpet if it is available. By peeling the secondary backing away they can loosen a yarn and carefully remove it through the backing. Another way is to lift the edge of the carpet or a cut edge around a vent. All the inspector needs to do is to detach the carpet, bend the secondary backing away and carefully pull a tuft from the primary backing. If uninstalled carpet or an edge are not available, inspectors should not pull tufts from anywhere else. The fibers will not be reliable for testing.
Analyzing the Sample
When they have the samples, the inspector should first report the percentage of backcoating that surrounds the yarn bundle for as many samples as possible. This way, they can see if there are large differences. As a general rule, inspectors are looking for around 70 percent for bundle wrap and penetration. Of course, a higher percentage is better, but it is fairly difficult to do.
When carpet inspectors pull samples properly, it can help them get a better idea of the bundle wrap encapsulation and penetration. This is an important indicator of the carpet’s performance.