Packaging Design & Materials Flashcards
7 cards from real CPP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Packaging Design & Materials flashcards as text
Which packaging material offers the best combination of high oxygen barrier and formability for thermoformed trays?
Answer: Ethylene vinyl alcohol (EVOH) multilayer structures
EVOH provides exceptional oxygen barrier properties and, when incorporated into multilayer coextruded structures, can be thermoformed into high-barrier trays.
In metal can manufacturing, what is the purpose of the 'double seam'?
Answer: To hermetically join the can end to the body using mechanical interlocking of metal layers
A double seam mechanically hooks and compresses the can body flange and end curl together with a sealing compound to create an airtight, hermetic closure.
What is 'coefficient of friction' (COF) and why is it critical in flexible packaging?
Answer: A measure of the sliding resistance between film surfaces that affects machinability and filling line performance
COF measures how easily film surfaces slide against each other or against machine parts, directly affecting whether packages can be handled efficiently on automated filling equipment.
Which design principle specifies that packaging graphics should remain legible when reduced to a size of 1.5 inches in height?
Answer: Thumbnail test
The thumbnail test evaluates whether a package's key design elements and brand identity remain recognizable at very small sizes, as seen in online retail thumbnails.
What is 'hot melt adhesive' most commonly used for in packaging applications?
Answer: Case sealing, carton closing, and labeling at high production speeds
Hot melt adhesives are thermoplastic materials applied in molten form that solidify quickly upon cooling, making them ideal for high-speed case sealing and carton closing operations.
In sustainable packaging design, what does 'lightweighting' refer to?
Answer: Reducing the total material used in a package while maintaining required performance
Lightweighting involves engineering packages to use less material — thinner walls, reduced caliper, or optimized geometry — while still meeting all performance requirements.
Which property of glass makes it uniquely preferred over plastic for certain pharmaceutical and premium food applications?
Answer: Chemical inertness — glass does not leach chemicals or absorb flavors
Glass is chemically inert and does not interact with its contents, making it the gold standard for products where chemical purity and flavor preservation are critical.