Polypropylene Copolymer (PP-CO) and Polypropylene Homopolymer (PP-HO) has excellent chemical resistance and is commonly used in packaging. It has a high melting point, making it ideal for hot fill liquids. Polypropylene has many applications and is found in everything from flexible and rigid packaging; fibers for fabrics and carpets; large moulded automotive parts like bumpers and dashboard; as well as consumer products like food storage containers.
Like most plastics, polypropylene is resistant to salt and acid solutions. Typical applications include ketchup bottles, yogurt containers, medicine bottles, pancake syrup bottles and automobile battery casings.
PP carries the recycle logo no.5
Popularity: 40% [?]
Low Density Polyethylene (LDPE) is predominantly used in film applications due to its toughness, flexibility and transparency. LDPE has a low melting point making it popular for use in applications where heat sealing is necessary. Typically, LDPE is used to manufacture flexible films such as those used for dry cleaned garment. LDPE is also used to manufacture some flexible lids and bottles, and it is widely used in wire and cable applications for its stable electrical properties and processing characteristics.
LDPE carries the recycle logo no. 4
Popularity: 37% [?]
High Density Polyethylene (HDPE) is used for many packaging applications because it provides excellent moisture barrier properties and chemical resistance. However, HDPE, like all types of polyethylene, is limited to those food packaging applications that do not require an oxygen or C02 barrier.
As a film, HDPE is used in snack food packages and cereal box liners. In blow-moulded bottles, for milk and non-carbonated beverage bottles. In injection-moulded tub form, for packaging margarine, whipped toppings and deli foods.
Because HDPE has good chemical resistance, it is used for packaging many household as well as industrial chemicals such as detergents, bleach and acids. General uses of HDPE include injection-moulded beverage cases, bread trays as well as films for grocery sacks and bottles for beverages and household chemicals.
HDPE carries the recycle logo no. 2
Popularity: 36% [?]