Food Packaging

What plastic is used for packaging bread?

LDPE (Low-density polyethylene)

State the full name that corresponds w/the recycling #4 for recyclable polymers.

LDPE low density polyethylene

Used in food packaging, what do the initials LLDPE stand for?

Linear low density polyethylene

What makes for stronger paper, long fibers or short fibers?

Long fibers

Among the following plastic films, which one is the most oxygen permeable? Plain celophane wrap, low density polyethylene, mylar (polyester)

Low density polyethylene

What material are most plastic bakery bags made of (the typical grocery store bread bags, for example)?

Low density polyethylene

What term describes one type of controlled atmospheric storage in which a refrigerated storage area is maintained under reduced pressure and high humidity to prevent product dehydration?

Low Pressure (hypobaric) Storage (LPS)

What are disposable critical temperature indicators (CTI's)?

Low-cost (usually less than one cent) devices which are attached to cases and even individual packages to indicate when an unacceptable temperature has been reached.

In what direction is paper the strongest for pulling, the machine direction or the cross-machine direction?

Machine direction

Paper, such as used in food packaging, can be aligned in two different ways when fed into forming machines. What are the two ways?

Machine direction and cross direction.

What are the 2 terms used to describe paper orientation?

Machine direction, cross direction

In 1990, which state became the first state to ban tetra-pak type juice boxes in the state's landfills?

Maine

What type of packaging controls involves actively or passively controlling the masses surrounding a product?

MAP

What is the term for the movement of components from the packaging material into the packaged food product?

Migration

What does the acronym MAP stand for in the context of extending the shelf life of fresh produce and meats?

Modified Atmosphere Packaging

Which type of food packaging atmosphere replaces air with a specific gas mixture (e.g., N2 and CO2) to extend shelf life?

Modified Atmosphere Packaging (MAP)

What type of packaging material allows gas exchange for fresh produce?

Modified atmosphere packaging (MAP) films

What is MAP and CAP wrt packaging?

Modified atmosphere packaging and controlled atmosphere packaging

What is the type of packaging called where the headspace is flushed with a mixture of gases at the time of packaging so that the fresh product finds it difficult to respire?

Modified Atmosphere Packaging or Controlled Atmosphere Packaging

In regards to food packaging, what is a passive MAP?

Modified Atmosphere Packaging that relies on the natural respiration of product and permeablity of packaging product. E.g. A piece of lettuce is placed in a package with a breathable film. As the lettuce respire, the oxygen inside the package decreases, and the carbon dioxide levels increase.