CPE Packaging Materials & Components 4

Question 1

Which test method is commonly used to evaluate the seal strength of flexible packaging heat seals?

Accepted Answer

T-peel or lap shear test

Answer

T-peel and lap shear tests measure the force required to separate heat-sealed flexible film bonds under controlled conditions.

Question 2

What is the function of a desiccant in pharmaceutical packaging?

Accepted Answer

To absorb moisture to protect moisture-sensitive products

Answer

Desiccants such as silica gel or molecular sieves absorb moisture within the package to protect products sensitive to humidity degradation.

Question 3

In blow molding of plastic containers, what is 'parison' programming used for?

Accepted Answer

Varying parison wall thickness along its length to control bottle wall distribution

Answer

Parison programming adjusts the die gap during extrusion to create a variable-thickness parison, compensating for uneven stretch during blowing.

Question 4

Which packaging component is most often used to provide tamper evidence on a plastic bottle closure?

Accepted Answer

Break-away band (pilfer-proof band)

Answer

A break-away band attached to the cap base fractures or separates when the cap is first opened, providing visual tamper evidence.

Question 5

What characteristic distinguishes biaxially oriented polypropylene (BOPP) from cast polypropylene (CPP) film?

Accepted Answer

BOPP has higher stiffness and better barrier due to orientation in two directions

Answer

Biaxial orientation of BOPP increases crystallinity, stiffness, optical clarity, and barrier properties compared to unoriented cast polypropylene.

(CPE) Certified Packaging Engineer Practice Test