Frequently Asked Questions

You can locate a rotomolder by using the rotomolder search tool. Or, you can post an inquiry with your contact information and a brief description of the part you want to manufacture. We will distribute your information to our members who can then contact you to discuss the project.

You can locate a supplier by using the supplier search tool. You may also find suppliers listed by category here.

Designer members can be found on the designers for rotomolding page.

There are many advantages to rotomolding. Tooling cost is much lower, which often makes rotomolding a more cost effective method, especially for smaller quantities. The process has virtually no size limitations and parts are produced with an even wall thickness, even at the corners. Complex shapes with molded in handles, graphics, threads, and inserts can all be part of the design, saving you time and money by eliminating secondary operations.

Rotomolding has come a long way from primarily producing tanks. Tanks are only one example of the products being produced today. Rotomolded parts are found in industries ranging from recreational to medical to automotive. See our Design Applications for a quick look at some amazing parts.

ARM members can review presentations and papers from the past 20+ years for answers to a multitude of technical questions. 

If you are a nonmember, you can post your question on our LinkedIn page.

The primary material used in rotomolding is polyethylene. However, a variety of other materials can be rotomolded, including PVC, nylon, polypropylene, cross-linked polyethylene, metallocene polyethylene and plastisols.

For an introduction to rotomolding, please utilize this webinar presented by Rick Carlsen (Solar Plastics) and Ron Joannou Jr. (Formed Plastics Inc.).

You can purchase educational materials through our Online Book Store. ARM also offers a variety of meetings and seminars throughout the year. Check out the Events page for details.

Dues depend on the annual sales volume and type of company applying for membership. ARM offers corporate membership, so once your company becomes a member, all of your employees can participate in member activities and benefits. Dues range from $719 to $4,565 per year. The current membership categories are: Rotomolder, Supplier, Designer, Consultant, and Educator. Visit our Membership page for complete details on dues as well as an application.

Benefits include full access to educational materials, discounted registration for seminars and conventions, sales/marketing and technical assistance, a complimentary subscription to the industry's technical magazine, research and development and peer networking opportunities.