The accumulation of salt at a glass surface due to high or fluctuating temperatures
Blooming
1 of 17
The most inert glass, shows the least amount of leaching of glass components, highly resistant to temperature changes due to low coefficient of thermal expansion. Also known as type 1 glass
Borosilicate
2 of 17
A type of glass made from soda lime but its surface has been treated with sulfur dioxide, suitable for solutions below pH7, also known as treated or dealkalised soda lime glass
Type two
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A standard soda lime glass used in food packaging. It is used to package large volumes >100ml
Type three
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A type of glass that packages large volumes of topical products like creams and oral products like mouthwashes. Cannot be used for parenterals as it is easily contaminated by materials leaching out of the glass
NP glass
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A type of metal used in packaging other than aluminium
Tinplate
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This is used to coat metal surfaces to isolate the metal from a product due to the possibility of interaction
Resins
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A term that is used interchangeably with rubbers as it is also used in stoppers. They are not totally inert - they are permeable to some extent
Elastomers
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Plastics are liable to undergo this phenomenon where the presence of solvents cause a plastic pack to become brittle, crack and eventually fail over time
Stress cracking
9 of 17
A term given to linear and branched polymer chains of plastics. Examples: polyvinyl chloride, polyethylene, polystyrene
Thermoplastics
10 of 17
A term given to cross-linked polymer plastics. Examples: urea formaldehyde, epoxides, urethanes
Thermoset
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A material made by bonding together two or more layers of different materials, such as paper, plastic and metal. It is used in sachets, blister packs, tubes, etc.
Laminates
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A type of polyethylene used when a rigid container is required; it has a milky translucence and is strong and stiff; can be autoclaved; good moisture barrier; permeable to gases
HDPE
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A type of polyethylene used when a flexible pack is required; it is clear; poor barrier to moisture and oxygen
LDPE
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A type of plastic used when a rigid container is required; it is clear and resistant to heat; excellent barrier to moisture and oxygen; contains less additives and has a lower tendency to sorb chemicals
Polypropylene
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A plastic polymer which can be found in cups, bottles, insulating materials; crystal version is clear and rigid but brittle; softens at high temperatures; poor barrier to gas and moisture
Polystyrene
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A plastic polymer whose use has declined due to having many additives; used in IV bags, blister packs and bottles; clear and glossy; can be stiff or flexible; medium barrier to moisture and gas
Polyvinyl chloride
17 of 17
Other cards in this set
Card 2
Front
The most inert glass, shows the least amount of leaching of glass components, highly resistant to temperature changes due to low coefficient of thermal expansion. Also known as type 1 glass
Back
Borosilicate
Card 3
Front
A type of glass made from soda lime but its surface has been treated with sulfur dioxide, suitable for solutions below pH7, also known as treated or dealkalised soda lime glass
Back
Card 4
Front
A standard soda lime glass used in food packaging. It is used to package large volumes >100ml
Back
Card 5
Front
A type of glass that packages large volumes of topical products like creams and oral products like mouthwashes. Cannot be used for parenterals as it is easily contaminated by materials leaching out of the glass
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