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Fibers

Chopped Strands

Johns Manville’s chopped strands reinforce thermoplastics, thermosets, gypsum board and nonwoven mats.  We design our fiber glass to your requirements, so your products will perform at optimum levels.  JM fibers may be hidden from view, but their effects are plain to see. We combine our glass fibers with plastics to mold stiffer, stronger and lighter weight products. JM fibers deliver a wide range of benefits that are easy to appreciate. We cover an array of markets and applications, which we detail below to help guide you in the right direction. You’ll also find detailed product information about our fiber offerings.   

In addition, we can tailor our products or solutions to satisfy the technical needs of your particular application. We will help ensure the solutions we manufacture for you are made with fibers of the highest quality. It is our goal to give you the highest level of confidence throughout every stage of the process.  fiber dimensions, bulk density and surface sizing, we are able to harmonize our chopped strands with the matrix they will reinforce.

ThermoFlow® and StarStran® materials reinforce thermoplastic and thermoset resins.  ThermoFlow® is a densified, tight filament, chopped fiber glass known for its low fuzz generation, consistent bundle size and shape, and excellent features for twin screw extrusion processes.  StarStran® bundles are un-densified chopped strands that disperse consistently in gentler resin compounding processes.

Chop-Pak® wet dispersible chopped fiber glass strands are great for creating nonwoven mats.  They readily exfoliate so the filaments entangle easily to create a smooth nonwoven and they are treated with a chemical sizing that is compatible with resin binder.

DuraCore® chop strands are made for either wet or dry delivery gypsum wallboard reinforcement.  They consistently disperse into the gypsum slurry, providing a reinforcement that resists flame excursion. 

We ship globally!  Contact a regional sales office for details.