Flashcards in Food Packaging Deck (31)
___ packaging is in direct contact with food and needs to be foodsafe; ____ packaging can have printed material and can be made of recyclable material
what are the primary functions of food packaging?
preservation, protect against physical damage, chemicals, bio contamination; aid distribution, create sales appeal
chips are surrounded by ___ not normal air, to prevent ____
examples of diff food pack materials?
paper, glass, metal, plastics, laminates, wood, cloth, wax, edible containers
what are examples of edible containers?
ice cream cones, cabbage leaves, bread, taco bowl
OTR stands for ____, WVTR is ____
oxygen transmission rate; water vapor transmission rate
examples of mechanical properties of food packaging
film strength, weight
recycling plastics follow the ___ coding system
how many types of recycling plastics?
what are the 7 types of recycling plastics?
1) PETE/PET 2) HDPE 3) PVC 4)LDPE 5) PP 6) PS 7) other (mixed)
what is PETE? What is it used for?
polyethylene terephthalate; used in soft drink/juice containers
what does HDPE stand for? What is it used for?
High density polyethylene; milk jugs
what does PVC stand for? what is it used for?
polyvinyl chloride; packaging films like saran wrap
____ is used for solar water disinfection
what is LDPE? What is it used for?
low density PE; grocery bags
what is pp? what is it used for?
polypropylene; yogurt containers
what is PS? What used for?
polystyrene; cups and plates
____ not good for barrier properties but is good for short term; it has lots of air in container to help with shape and support; can taste parts per billion of this
what is MAP?
modified atmosphere packaging
why do fresh meats include high oxygen?
to maintain bloom of myoglobin pigment
plant hormone causing ripening
MAP for fruit and veg need consider:
humidity, o2, co2, ethylene, temp
why fruit and veg need some oxygen?
don't want switch to anaerobic resp/fermentation (pickling)
how is controlled atm (CA) diff from MAP?
it actively monitors and changes atm around product
example of CA?
active/smart packaging contains _____
oxygen scavengers (iron, ascorbate, glucose oxidase); temp sensors; anitmicrobial/antioxidant films
purpose of microwave susceptors?
why does 2 part tray system speed up heating?
condensation from steam to liquid (heat of condensation) has lots of energy associated, so transfer greater amount of heat than just submerging solid in liquid sauce
self-heating containers use ___ reaction; same principle as ____
exothermic; hand warmers