Basic Forms and Terms.HO (1)

Basic Forms and Terms.HO (1) - Basic Forms and Terminology...

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Basic Forms and Terminology PKGSC 102 Packaging Forms Three Basic Forms Rigid Semi-rigid Flexible Rigid Has a defined shape Cannot be deformed except by imposing a relatively massive force Deformation will result in breakage or other permanent damage Example: Glass bottle Semi-Rigid Has a defined shape Can be deformed with moderate force When force is removed, it returns to original shape Example: Plastic squeeze bottle Flexible Takes on the shape of the product Can be distorted with ease When distorting, force is removed and does not return to original shape Example: candy bar wrapper potato chip bag Continuum Rigid Semi-Rigid Flexible 1
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Rigid containers Paperboard - corrugated, spiral and convolute cans, set up boxes Metal - cans Glass – only comes in one form – rigid Plastics – injection molded and some thermoformed, depends on the plastic used Closures (all will be rigid) Set Up Boxes Closures Metal threaded lug style roll on press on crown (glass soda) friction fit/pry off (paint can) Plastic Some thermoset Mostly thermoplastic (PE or PP) Induction seal - not really a closure but is part of the seal - foil lined innerseal is flexible form example) metal/paperboard seal on the inside of an Advil bottle Liner Systems used for Induction Seals 2
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