Frequently Asked Questions
How can I contact someone to make my part?
You can locate a rotomolder by searching our online
Membership Directory. 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.
How do I find a supplier of molds, resins, machines, etc?
You can locate a supplier by searching our online
I need someone to design my part. Who can I contact?
You can contact a designer member using the online Membership Directory.
Why would I choose rotomolding over other processes?
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 produces hollow tanks, right?
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.
Where can I get answers to technical questions?
ARM members can search the iLibrary for technical papers and presentations from the last 20+ years. If you are a nonmember, you can post your
question on our LinkedIn page or on Polysort's rotomolding discussion board.
What materials are used in rotomolding?
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.
How do I learn more about rotomolding?
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.
How much does it cost to join ARM?
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 $670 to $4,060 per year. The current membership categories are Rotomolder,
Supplier, Designer, Consultant and Educator/Student. Visit our
Membership page for complete details on dues as well as an
What are the benefits of joining ARM?
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.