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  • McDougall Helms posted an update 3 months, 1 week ago

    Resins… Film thickness… Tensile strength… Impact resistance… So what can all of these terms mean for your requirements when choosing your polyethylene bags?

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

    Resins (Understood to be: Any one numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials like polyvinyl, polystyrene, and polyethylene and thermosetting materials such as polyesters, epoxies, and silicones that are used in combination with fillers, stabilizers, pigments, and other components to form plastics.)

    Some find it overwhelming because of the different resins available these days. Would you choose if you have octene, metalocene, butene, hexene, etc… A qualified sales representative can help determine what grade to use. Each grade has different characteristics and choices needs to be according to applications. Understanding resin properties is critical in formulating the best product for your specific application.

    Film Thickness (Gauge)

    Polyethylene film thickness is measured by thousandths inch, or milli-inch. The thickness from the bag doesn’t invariably correlate into strength. A heavy gauge bag might not be strong. Frequently it is just a combination of resin grade and gauge relative to the approval. A two mil octene linear bag can have more strength than the usual 2 mil butene linear.

    Tensile Strength vs. Impact Resistance

    Tensile strength is the maximum stress a material can withstand while being stretched or pulled before breaking. Why so much interest?

    It is advisable to possess a plastic bag that’s sufficiently strong enough enough on your application. A plastic bag that holds 50 pounds of cloth should have adequate tensile strength, otherwise the bag will end up breaking.

    Impact resistance is often a material’s power to resist shock loading. Precisely what does this suggest?

    Basically it’s the film’s power to resist being punctured. A punctured bag may lead to contaminated goods or product loss.

    When choosing the best gauge and resin formula you should consider how tensile strength and impact resistance are strongly related your packaging application. A good example that can correspond with can be a garbage bag. I’m sure most have had failure within a garbage bag whether or not this breaks when lifting out of your can (tensile strength) or waste materials punctures holes within it (impact resistance). With all these variables in choosing the right formula for the polyethylene package, developing a knowledgeable salesman is important.

    Isn’t there were a great deal to learn about making Polyethylene "Film and Bags"!?!

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