Food Packaging

Polyethylene is available in low density, medium density, and high density forms. As density increases, what happens to the moisture and gas barrier properties?

The barrier to moisture and gas improves

Polyethylene is available in low density, medium density, and high density forms. As density increases, what happens to the impact strength properties?

The film impact strength decreases.

What is flavor scalping?

The flavor compounds migrate into packages.

In regards to packaging what does a body hook refer to?

The hook on the body of a can that engages the lid to make a hermetic seal

What is meant by the "signature line" on a package?

The name and address of manufacturer, distributor or importer

What does differential tin coating mean?

The thickness of tin coating is different on the inside and outside of the can

Name the two methods of making two piece steel cans.

The two methods are draw redraw, and drawn and wall ironed.

Why is quality of food better in flexible retort pouches than in conventional cans?

Thinner profile means the less time to reach sterilizing treatment at center of pouch.

Why are high-basis-weight steel cans preferred over aluminum cans for packaging of heat sterilized foods?

This is particularly important during the heat processing and distribution stages, where steel cans can better withstand the pressures and impacts without deforming or leaking

In intelligent packaging, what is TTI?

Time temperature indicator

This important packaging material was patented in 1810 by Peter Durand of England.

Tin can

Until a few years ago, nearly all steel used for cans was coated to inhibit corrosion. What was the material used to coat the can?

Tin coating

What metal was historically used to solder the side seams of tin cans?

Tin-lead solder

What is the strength of a tin plate measured by?

Tinplate temper, the unit is in Base Box

What is the main function of an oxygen scavenger in food packaging?

To absorb residual oxygen and extend shelf life.

What is the primary purpose of modified atmosphere packaging (MAP)?

To extend shelf life by altering the gas composition inside the package

What is the function of a barrier layer in multilayer food packaging?

To prevent gas, moisture, or aroma transmission.

Name the process whereby a thin, continuous layer of aluminum is deposited onto a sheet of polymeric film, laminated to a paper or paperboard sheet, and then the aluminum and paper are separated from the polymeric sheet.

Transfer metallization

What does UPC stand for in food packaging, and how many digits does it have?

Universal Product Code, 12 digits

To give maximum stacking strength in a corrugated box, should the fluting be verticle or parallel to the depth dimension?

Vertical