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
What is the primary purpose of 'venting' in microwave-safe packaging design?
Answer: To prevent pressure buildup from steam that could cause the package to burst during heating
Venting features in microwave packaging allow steam to escape during cooking, preventing dangerous pressure buildup that could cause the sealed package to rupture.
In packaging engineering, 'stack strength' of a corrugated box is primarily measured by which test?
Answer: Box Compression Test (BCT)
The Box Compression Test (BCT) measures the maximum compressive load a filled and sealed corrugated box can withstand before failure, directly simulating warehouse stacking conditions.
What is the key advantage of 'coextrusion' over lamination in producing multilayer flexible films?
Answer: Coextrusion produces a single-step, solvent-free structure without adhesive layers, reducing cost and potential contamination
Coextrusion combines multiple polymer layers in a single die pass without adhesives or solvents, making it more cost-efficient and eliminating potential issues with adhesive migration.
Which of the following is an example of 'active packaging' technology?
Answer: An oxygen scavenger sachet placed inside a sealed package to absorb residual oxygen
Active packaging includes components that actively interact with the product or headspace environment, such as oxygen scavengers, moisture absorbers, or antimicrobial agents.
What does 'OTR' (Oxygen Transmission Rate) measure in packaging films?
Answer: The volume of oxygen that passes through a unit area of film per unit time under specified conditions
OTR quantifies how much oxygen permeates through a film per unit area per unit time, typically expressed as cc/(m²·day) at specified temperature and relative humidity.
In the context of retail packaging design, what is a 'blister pack'?
Answer: A preformed plastic cavity heat-sealed to a backing card that displays and protects a product
A blister pack consists of a thermoformed plastic cavity (the blister) sealed to a printed paperboard or foil backing, providing product visibility, security, and tamper evidence.
Which property distinguishes 'oriented' films (such as BOPP or BOPET) from their unoriented counterparts?
Answer: Biaxial orientation improves tensile strength, stiffness, clarity, and barrier properties by aligning polymer chains
Biaxial orientation stretches the film in both machine and transverse directions, aligning polymer chains and crystalline structures to dramatically improve mechanical strength, optical clarity, and barrier performance.