One of the most important parts of dealing with plastics for both health and environmental purposes, is familiarizing ourselves with the different types do you know the difference between the number 3 and number 7 types of plastic. Recycling certain types of plastics can be unprofitable as well for example, polystyrene is rarely recycled because the process is usually not cost effective these unrecycled wastes are typically disposed of in landfills, incinerated or used to produce electricity at waste-to-energy plants. The two main types of plastics are called thermosetting plastics and thermoplastics thermosetting plastics, once heated and cooled, cannot be reheated and remolded thermoplastics can be reheated and reshaped examples of thermosetting plastics are silicones, urea aldehyde and bakelite the most.
Spi code 7 the spi code 7 is used to designate miscellaneous types of plastic that are not defined by the other six codes think of these items as plastics, but ones that don’t conform to society’s rules by fitting into a specific spi code.
Although plastics can be broken down into broad types or categories, there actually are thousands of different plastics, each with its own composition and characteristics one plastic may block oxygen from reaching food. This section contains information and resources on plastics, plastic types, plastic alternatives, and the effects of plastics on health and the environment.
Prescription bottles plastic bottle caps are often made from pp polystyrene is commonly recycled, but is difficult to do items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from ps code 7 is used to designate miscellaneous types of plastic not defined by the other six codes. Types of plastics - types of plastics include thermoplastic, polystyrene and polyethylene learn more about some of the different types of plastics. Finally, the polymer resins are processed into final plastic products generally, they are heated, molded and allowed to cool there are several processes involved in this stage, depending upon the type of product.
Plastics can be divided into two major categories: 1 thermoset or thermosetting plastics once cooled and hardened, these plastics retain their shapes and cannot return to their original form they are hard and durable thermosets can be used for auto parts, aircraft parts and tires examples include polyurethanes, polyesters, epoxy resins and phenolic resins.
There are two main types of plastics – thermoplastics which are softened by heat and can be moulded (injection moulded, blow moulded or vacuum formed) good examples are acrylic, polypropylene, polystyrene, polythene and pvc. Different types of plastics and their classification the society of the plastics industry (spi) established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic.
A look at the many types of plastics plastic has become increasingly important in our every day lives with so many different types of plastics, products meeting a broad range of consumer needs are available.