Resins... Film thickness... Tensile strength... Impact resistance... What do these terms mean to you personally when choosing your polyethylene bags?
If you aren't a poly salesman and have a qualification in Plastics Engineering, the terminology utilized in a probably makes your brain spin. To help you out, 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 such as polyvinyl, polystyrene, and polyethylene and thermosetting materials for example polyesters, epoxies, and silicones which might be in combination with fillers, stabilizers, pigments, and other components in order to create plastics.)
Some think it's overwhelming because of the different resins available nowadays. How do you choose for those who have octene, metalocene, butene, hexene, etc... An experienced salesman will be able to help know what grade to use. Each grade has different characteristics and choices needs to be based on applications. Understanding resin properties is critical in formulating the proper product to your specific application.
Film Thickness (Gauge)
Polyethylene film thickness is measured by thousandths of an inch, or milli-inch. The thickness with the bag doesn't invariably correlate into strength. A whopping gauge bag may not be strong. Most often it is just a blend of resin grade and gauge when compared with the approval. A two 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 which a material can withstand while being stretched or pulled before breaking. Why so much interest?
It's important to have a very plastic bag which is sufficiently strong enough enough to your application. A plastic bag that holds 50 pounds of cloth must have adequate tensile strength, otherwise the bag can become breaking.
Impact resistance can be a material's power to resist shock loading. Precisely what does this implies?
Basically it is the film's capability to resist being punctured. A punctured bag may result in contaminated goods or product loss.
When scouting for the correct gauge and resin formula you should consider how tensile strength and impact resistance are strongly related your packaging application. One example that can correspond with is often 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 elements punctures holes inside (impact resistance). Effortlessly these variables in selecting the correct formula to your polyethylene package, developing a knowledgeable salesman is important.
Who knew there was clearly a great deal to understand about making Polyethylene "Film and Bags"!?!
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