• McDougall Caspersen posted an update 4 months ago

    Resins… Film thickness… Tensile strength… Impact resistance… So what can many of these terms mean to you when buying your polyethylene bags?

    If you’re not a poly salesman or have a degree in Plastics Engineering, the terminology found in the industry probably makes your head spin. To assist you, we’ve created Polyethylene Packaging 101.

    Resins (Defined as: Any one numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials including polyvinyl, polystyrene, and polyethylene and thermosetting materials including polyesters, epoxies, and silicones which might be used with fillers, stabilizers, pigments, as well as other components to make plastics.)

    You may find it overwhelming with all the current different resins available today. You can view choose if you have octene, metalocene, butene, hexene, etc… A qualified sales representative can help figure out what grade to use. Each grade has different characteristics and choices needs to be according to applications. Understanding resin properties is very important in formulating the correct product on your specific application.

    Film Thickness (Gauge)

    Polyethylene film thickness is measured by thousandths of an inch, or milli-inch. The thickness with the bag does not always correlate into strength. Huge gauge bag is not always strong. Most often it’s a blend of resin grade and gauge compared to the application form. A couple mil octene linear bag could have more strength when compared to a 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 is this important?

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

    Impact resistance is a material’s ability to resist shock loading. Exactly what does this implies?

    Basically oahu is the film’s capability to resist being punctured. A punctured bag may lead to contaminated goods or product loss.

    When choosing the best gauge and resin formula it is important to consider how tensile strength and impact resistance are strongly related your packaging application. An example that everybody can relate with is really a garbage bag. I know they’ve got had failure in a garbage bag if it breaks when lifting from the can (tensile strength) or waste materials punctures holes within it (impact resistance). Effortlessly these variables in choosing the proper formula for your polyethylene package, developing a knowledgeable salesman is critical.

    Well isn’t there were much to know about making Polyethylene "Film and Bags"!?!

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