Santana Dehn posted an update 1 year, 8 months ago
Resins… Film thickness… Tensile strength… Impact resistance… Exactly what do all of these terms mean for you when choosing your polyethylene bags?
Unless you are a poly salesman or have a diploma in Plastics Engineering, the terminology employed in the industry probably makes your head spin. To assist you, we’ve created Polyethylene Packaging 101.
Resins (Thought as: Any one numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials such as polyvinyl, polystyrene, and polyethylene and thermosetting materials like polyesters, epoxies, and silicones which are used with fillers, stabilizers, pigments, and other components in order to create plastics.)
Some think it’s overwhelming with all the different resins available nowadays. Would you choose if you have octene, metalocene, butene, hexene, etc… A knowledgeable salesman should be able to help figure out what grade to utilize. Each grade has different characteristics and choices needs to be depending on applications. Understanding resin properties is important in formulating the right product on your specific application.
Film Thickness (Gauge)
Polyethylene film thickness is measured by thousandths of an inch, or milli-inch. The thickness of the bag doesn’t always correlate into strength. A whopping gauge bag isn’t necessarily strong. Usually it is just a combination of resin grade and gauge in accordance with the application form. A couple of mil octene linear bag may have more strength compared to a 2 mil butene linear.
Tensile Strength vs. Impact Resistance
Tensile strength could be the maximum stress that the material can withstand while being stretched or pulled before breaking. Why is this important?
It is critical to use a plastic bag that is sufficiently strong enough for the application. A plastic bag that holds 50 pounds of cloth will need to have adequate tensile strength, otherwise the bag can become breaking.
Impact resistance is a material’s power to resist shock loading. What does this mean?
Basically it is the film’s capacity 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 tightly related to your packaging application. An illustration that can relate to is often a garbage bag. I’m sure they’ve got had failure inside a garbage bag if it breaks when lifting out of your can (tensile strength) or waste punctures holes in it (impact resistance). With all of these variables in picking the best formula for your polyethylene package, using a knowledgeable salesman is vital.
Well isn’t there is so much to understand about making Polyethylene "Film and Bags"!?!
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