Fiberweb meltblown polypropylene weights range between 13 and 700 gsm (grams per square meter). For the sorbents industry, these machines typically generate 17 gsm fine fiber membranes and 110 to 400 gsm coarse fiber layers. Thin spunbond polypropylene membranes, which are manufactured in Fiberweb’s adjacent factory, can also be introduced via thermal bonding. Each of the four surface textures (standard non-bonded mb pp, bonded mb pp, fine fiber mb pp, and sb pp) has a different usage application.
Within the composition of the various pad and roll absorbent products, each has two different absorption capabilities. We refer to them as oil-only (hydrocarbon-based fluids) or universal/hazmat (most fluids, including acids and bases).
Oleophilic / hydrophobic sorbents are primarily used to absorb hydrocarbon-based fluids off of the surface of water. The coarse/open fiber construction of standard meltblown polypropylene quickly attracts low surface tension fluids, such as oil, gasoline, diesel, and many other petroleum fluids. "Oil-Only" sorbents are generally blue or white in color.
Hydrophilic sorbents are treated with surfactant, which breaks down the surface tension of water and allows it to adhere to polypropylene fibers. These sorbents are primarily used in production facilities to absorb leaking fluids from machinery, as well as fluid storage containers. With that said, polypropylene is highly inert and can be used to absorb very aggressive fluids, such as most acids and bases. Refer to our chemical compatibility chart for recommendations. "Universal" sorbents are generally, gray, green, or yellow. Yellow sorbents are marketed for hazmat applications and are listed as such.
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