Proper Sampling Techniques Webinar October 18

ARM’s free webinar on October 18 will review the proper techniques for rotomolding operations

Conceptual keyboard - Training (green key)Josh Hunsberger and Dave Loeffler of Brunk will discuss the dangers of improper sampling techniques, techniques for sampling from box receipts or bulk receipts, inspection of pelletized polymers, sample identification and more.

Register for this webinar online here. If you need your username or password, contact ARM staff.

Members can watch 19 ARM webinars on-demand by logging into the Members’ section at then visiting the Webinar page.

Webinars are free to members thanks to a sponsorship from Entec Polymers.

Annual Meeting Takeaways: Polypropylene Has a Place in Rotomolding

Over the next few weeks, the ARM blog will highlight the takeaway points from some of the key presentations given at ARM’s 40th Annual Meeting in New Orleans. The first of these posts comes from Tom Wyszynski, a new inductee in the Rotational Molding Hall of Fame, who summarizes the key points of his presentation on Septmember 27.


Tom Wyszynski

Polypropylene is an incredible polymer. Contrary to what some may think, there is a place for it in rotational molding. Designers, engineers, and molders need to remember it is not polyethylene – and it is not trying to be polyethylene.

The characteristics of polypropylene are very different from those of polyethylene – and that’s a good thing. PP has the ability to do well in higher temperature conditions than does PE. Polypropylene has very good chemical resistance and a very high flexural modulus. Many types of tanks, bins, and assorted containers are molded from polypropylene.

The high melt point and deflection temperature allow polypropylene to handle applications polyethylene could never touch. Those same thermal traits allow polypropylene to be disinfected using and autoclave. The 120°C operating temperature of an autoclave is almost at the melt point of some LLDPEs. Food and pharmaceutical applications love the fact this polymer can be sterilized via autoclave.

The copolymer polypropylenes being produced today for rotomolding are light years ahead of the compounds available years back. Careful selection and incorporation of impact modifiers as well as thermal and ultraviolet light stabilizers have really improved polypropylenes. While polypropylene may not have the impact resistance of PE many applications simply are not impact sensitive.

We deal with many things in our lives that are not impact resistant yet they serve a function. Polypropylene has a place in rotational molding but it needs to be the correct application.

Tom Wyszynski is a technical manager for rotomolding resins at A. Schulman and was inducted into the Rotational Molding Hall of Fame in September 2016.

Copeland & Wyszynski to be Inducted in the Rotational Molding Hall of Fame

The Association of Rotational Molders is proud to announce that Steve Copeland (Jerico Plastics) and Tom Wyszynski (A. Schulman Inc.) will be inducted into the Rotational Molding Hall of Fame on Monday, September 26 at the ARM Annual Meeting in New Orleans.


Steve Copeland


Tom Wyszynski

Steve Copeland has been a force for growing rotomolding for the past 35 years. As a member of the ARM Board and a volunteer on many committees, he was instrumental in raising the public perception of rotomolding and awareness of the Association.

Tom Wyszynski has served on numerous committees and has presented at many different ARM meetings. He has developed formulations and compounds that have been used in a myriad of applications, helping to improve many different products. He is well known for his ability to help molders improve the quality of their parts.

ARM congratulates Steve and Tom on this achievement and we thank them for years of service to our industry!

Quick Links for ARM’s 40th Anniversary


Register online or via PDF.

New Orleans is not affected by the recent flooding in Louisiana.

These hotels have ARM blocks with rooms available.

Plastics News coverage of ARM’s 40th Anniversary.

General Sessions & Workshops. Keynotes & Seminars.

Order T-shirts and Polos by August 25. 

Safety Competition forms due September 6.

Product Competition Entries due September 11.

Tours for spouses, luminaries, and all attendees.



ARM Technical Director Nick Henwood to Increase Technical Value in ARM

ARM has moved to add significant value to membership in the Association by hiring Dr. Nick Henwood to serve as the ARM Technical Director. This appointment will improve and increase the technical content provided by ARM.

First and foremost, ARM members will see added technical value at our meetings, during our webinars, and on our website. Dr. Henwood will collect technical information from throughout the industry for ARM to disseminate to our members.


Dr. Nick Henwood will add value to ARM’s meetings, webinars, and website in his new role as ARM Technical Director.

Nick’s original degree was in Civil & Structural Engineering, but his PhD studies led him into various branches of chemical engineering. His first involvement with rotomolding came in the mid-80s, while working at Dow Chemical Europe.  He helped to develop Dow’s polyethylene roto grade slate, both technically and commercially.

From then on, he was hooked on rotomolding and, in 1992, he founded a UK-based rotomolding materials supplier, Matrix Polymers Limited.  Over the next 14 years, Matrix grew from a two-man outfit operating from Nick’s basement to a major European materials supply company.

In 2006, Nick sold his shares in Matrix and formed Rotomotive, a training and consultancy company.  Since then he has completed a large number of projects for rotomolder, OEM and end-user clients across the world.

Nick has been committed to the development and dissemination of rotomolding knowledge, through published technical papers and though contributions to rotomolding conferences worldwide.  He served a term on the Board of ARM, as a Supplier Director, in the early 2000’s.

Outside of rotomolding, Nick is a Key Volunteer for a major charity, Cancer Research UK and was recommended for their prestigious Flame of Hope Award in 2015.  He has been married to his wife Helen for 40 years, has 3 children and 5 grandchildren.

ARM is proud to announce that Dr. Henwood will bring his technical insight to ARM and our members.

President’s Message: Farewell Roy and Welcome Nick!


Conchita Miranda

Life always presents curious coincidences…

We announced at the beginning of the year that one of our objectives this term was to have a Technical Director for ARM again.

We had a great one for years: Dr. Roy Crawford, working from Queen’s University at Belfast, served ARM as an extraordinary scientific Technical director.

When he moved to the opposite part of the world and took a lot of new responsibilities, he finished being our technical director, but ARM’s friendship with him never ended.

Roy was an erudite gentleman.  I learned a lot from him, and I am pretty sure that all rotomolders around the world can say the same.  He dedicated his life to research and sharing his knowledge, from Ireland to New Zealand.  From ARM to RotoWorld.  From his lab to the world.  Our industry owes much of our development over the decades to him.

The rotomolding industry worldwide will never forget him.

Last month, already retired and enjoying his free time, Roy passed away.  At the same time, ARM was coming to an agreement with our new Technical Director.  It is like if our dear Professor left his baton to Dr. Nick Henwood.

So, as always in life, sad moments just come with good ones, and hope and excitement for the future make us rise and be optimistic.

Having Dr. Nick Henwood as our new Technical Director will help ARM and the industry to take next steps, to go further, and to grow big.

Dr. Henwood has been involved with rotomolding since the mid-80s and served on the ARM Board of Directors. You can read more about his new role as our technical director here.

Farewell Roy!  Welcome Nick!  Thank you both for being part of this great Association.

Conchita Miranda is the President of ARM and the Director General of Operadora MPK.

The ARM Blog is written by a variety of leaders in the rotational molding industry. We encourage you to share your input in the comment section. If you’re interested in writing a post for the blog, email ARM staff at