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Resins… Film thickness… Tensile strength… Impact resistance… What can these terms mean to you personally when buying your polyethylene bags?

If you aren’t a poly salesman or have a qualification in Plastics Engineering, the terminology used in the market probably makes your brain spin. To assist you, we’ve created Polyethylene Packaging 101.

Resins (Thought as: Some of numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials such as polyvinyl, polystyrene, and polyethylene and thermosetting materials for example polyesters, epoxies, and silicones which can be used with fillers, stabilizers, pigments, along with other components to make plastics.)

Some think it’s overwhelming because of the different resins available today. You can view choose when you have octene, metalocene, butene, hexene, etc… An educated salesman should be able to help know what grade to use. Each grade has different characteristics and choices should be based on applications. Understanding resin properties is critical in formulating the proper product on your specific application.

Film Thickness (Gauge)

Polyethylene film thickness is measured by thousandths of an inch, or milli-inch. The thickness in the bag does not always correlate into strength. Much gauge bag may not be strong. Most often it is a mix of resin grade and gauge compared to the application. A couple mil octene linear bag may have more strength than a 2 mil butene linear.

Tensile Strength vs. Impact Resistance

Tensile strength could be the maximum stress a material can withstand while being stretched or pulled before breaking. Why is this important?

It is critical to have a plastic bag which is strong enough to your application. A plastic bag that holds 50 pounds of cloth must have adequate tensile strength, otherwise the bag will end up breaking.

Impact resistance is a material’s capability to resist shock loading. What does this suggest?

Basically it does not take film’s power to resist being punctured. A punctured bag could lead to contaminated goods or product loss.

When selecting the proper gauge and resin formula it is very important consider how tensile strength and impact resistance are tightly related to your packaging application. An illustration that can connect with is often a garbage bag. I believe they have got had failure in a garbage bag whether or not it breaks when lifting out of your can (tensile strength) or waste punctures holes in it (impact resistance). With all these variables in selecting the best formula for the polyethylene package, having a knowledgeable salesman is important.

Who knew there was clearly a great deal to learn about making Polyethylene "Film and Bags"!?!

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