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Details You Need To Understand About Polyethylene Packaging 101

cubannode25Aug 6, 2019, 10:03:14 AM
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Resins... Film thickness... Tensile strength... Impact resistance... Exactly what do most of these terms mean for your requirements when selecting your polyethylene bags?

If you aren't a poly salesman and have a degree in Plastics Engineering, the terminology used in the probably makes your head spin. To help you, we've created Polyethylene Packaging 101.

Resins (Looked as: Any one of numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials like polyvinyl, polystyrene, and polyethylene and thermosetting materials like polyesters, epoxies, and silicones which are in combination with fillers, stabilizers, pigments, as well as other components to create plastics.)

You may find it overwhelming because of the different resins available today. How does one choose when you have octene, metalocene, butene, hexene, etc... A qualified sales representative should be able to help figure out what grade to work with. Each grade has different characteristics and choices needs to be depending on applications. Understanding resin properties is important in formulating the best product for the 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. Usually it is just a mixture of resin grade and gauge relative to the application. A couple of mil octene linear bag can have more strength compared to a 2 mil butene linear.



Tensile Strength vs. Impact Resistance

Tensile strength may be the maximum stress that the material can withstand while being stretched or pulled before breaking. Why is this important?
It's important to possess a plastic bag that's sufficiently strong enough enough on your application. A plastic bag that holds 50 pounds of cloth have to have adequate tensile strength, otherwise the bag can become breaking.

Impact resistance is often a material's ability to resist shock loading. What does this implies?
Basically it is the film's capability to resist being punctured. A punctured bag may lead to contaminated goods or product loss.

In choosing the right gauge and resin formula it is important to consider how tensile strength and impact resistance are relevant to your packaging application. A good example that everybody can relate with is often a garbage bag. I'm certain they have had failure in the garbage bag whether or not this breaks when lifting from the can (tensile strength) or waste punctures holes inside it (impact resistance). With all of these variables in picking the best formula on your polyethylene package, using a knowledgeable salesman is critical.

Isn't there is so much to learn about making Polyethylene "Film and Bags"!?!

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