Development of a Woven Polyester Belt for the Plastic Bag Manufacturing Industry

We were recently approached by a client in the plastic bag manufacturing industry for a solution to a quality control issue. The company was experiencing inconsistencies and throughput problems on one of their bag lines due to a belt issue. The source of these problems originated from the inexpensive welded and unsupported green belt used to thread the process plastic film onto the bag making machine. The client thought switching to a non-stretch belt would be a solution.

Working closely with the client on product improvement and development, we engineered a knitted endless belting solution made from polyester woven fabric with a durable urethane coating. The belts were manufactured as matched sets with dimensions of 28″ and 34″ in length, ½” in width, at 1 mm thick, all to tolerances of +0/-0.0005″. The client realized an immediate improvement in quality once the new stable urethane belts were installed on the machinery.

Our company provided a seamless belting solution that greatly improved the manufacturing process for this plastic bag manufacturer. Please contact Megadyne Belt Corporation of America for additional details on this belting project.

  • Company was using an inexpensive welded unsupported belt for process plastic film on a bag making machine.
  • Client needed to improve throughput and consistency in the quality of the bags. They wanted to convert to a non-stretch belt.
  • The Megadyne Belt Corporation of America’s solution was a polyester fabric supported belt with a urethane coating in matched sets for length.
  • In picture, green belt was the original belt, ours is the clear stable urethane material.

Product Description

sed to thread the plastic film through the bag manufacturing machine.

Capabilities Applied/Processes

Engineering – Product Improvement
Product Development
Knitted Endless – Woven Fabric
Urethane Coating

Overall Part Dimensions

Length: 28 in, 34 in
Width: 1/2 in
Thickness: 1 mm

Tightest Tolerances

+0 / – 0.0005″

Material Used

Urethane Coating
Base Material – Polyester Woven Fabric

In process testing/inspection performed

Dimensional Inspection

Industry for Use

Plastic Bag Manufacturing

Delivery/Turnaround Time

6 Weeks

Delivery Location


Standards Met

Customer Specifications, 2D CAD Drawing

Product Name

Threading Belts

Why did you choose this project to show case?

To demonstrate our engineering design work with clients to find innovative solutions

Product Description

Used to thread the plastic film through the bag manufacturing machine.