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Three resin families, each chosen for a different job.
The linear polyethylene family is the most widely used group of plastics for rotational molding. It’s economical, tough and compatible with a wide range of chemicals, it’s easy to color, and a long-term UV protection package is standard. Linear polyethylene is not crosslinked, so tanks can be welded, repaired and recycled.
An engineering plastic chosen for its thermal properties: polypropylene handles continuous use temperatures up to 200°F and can be joined by thermoplastic welding. The inside surface of a rotationally molded polypropylene tank may not be perfectly smooth, and wall thickness can vary on large tanks; the tank’s integrity is not affected.
A specialty fluoropolymer used for high-purity service and for chemicals that attack other plastics. PVDF is resistant to most acids and oxidizers, handles up to 275°F in some applications, and can be joined by thermoplastic welding.
We can mold parts with layers of different materials, such as an HDPE tank with a PVDF inner layer, or a polyethylene wall with a molded-in foam layer. Contact us if your application could benefit from multi-layer molding.
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