Las Vegas, Nevada -- Filament winding is a common process for manufacturing cylindrical structures such as pipes and tanks with composite resins, and Bayer MaterialScience llc has developed new proprietary urethane formulation tailored specifically for the process.
Filament winding offers a fast cycle time and produces parts that are strong and lightweight, and BMS points out that using urethanes provides a styrene-free end product, unlike commonly used resin systems. Bayer's new polyurethane formulation makes it possible to create lightweight, strong, styrene-free parts that are also lower in volatile organic compounds (VOCs).
"Our scientists are always looking for ways to advance the technology used to make composite parts," said Gene Symosko, market specialist, Polyurethanes, Bayer MaterialScience, in a news release. "In this instance, we tweaked the polyurethane chemistry to overcome a materials challenge, adapt it to our customers' needs, and in doing so make an existing process more robust."
To illustrate the end products possible using its custom proprietary polyurethane formulation in filament winding, Bayer has created prototype parts - a low-pressure bottle and a cylinder. BMS showcased these parts at its booth 57 at Composites 2012, held 21-23 Feb in Las Vegas.
One is a low-pressure bottle, similar to tanks used in water softeners and hot water heaters. The part made with a Bayer PU system via filament winding has a 15 - 20 percent higher burst pressure than the same part made in epoxy.
The cylinder can be used as tubing and pipe protection for oil-field uses, says BMS, replacing the traditional metal layer used to protect pipe insulation, cutting costs while achieving ease of assembly and better impact resistance.
Manufacturers using Bayer's polyurethane formulation in filament-winding will also no longer be restricted by reaction time. Finished parts can be wound in as little as 10 minutes.