Thermoformed Packaging    
The strength of a thermoforming sheet used for shipping containers can be compromised in a number of ways. Sheets of plastic polymers are melted, formed, and cooled to produce sturdy pallets. It is important to start with a clean, high quality extruded plastic sheet to maximize strength and integrity.

Ensure Integrity and Strength in Thermoforming Sheets
Every step of the thermoforming process is observed by production specialists and designers. There are several ways that these professionals create stronger sheets prior to the thermoforming process:

• Proper timing for heating and cooling in the extrusion stage
• Begin with a clean plastic with the proper melt index for the end process
• Use well maintained extruders
• Pay attention to sheet orientation which affects shrinkage in the end product

Most production runs can be completed successfully without straying far from simple polymers. There is a delicate dance that is performed with every project completed by a thermoforming machine. Each sheet of plastic undergoes extreme heat and cold to create a specially shaped product. Designers need to keep their eyes on machine temperatures and the speed of production to avoid common structural problems.

The vacuum forming process was first used by Robinson Industries Inc. to produce pallets. Robinson's sales staff is available at sales@robinsonind.com for questions about thermoforming processes.

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