Tue. Oct 4th, 2022

It can be found in bottles, containers, packaging, and other commonplace goods. Plastic is as adaptable as it is biodegradable. You can help businesses save money and lessen their environmental effect by recycling plastics you use every day. Plastics, on the other hand, are not all created equal. The SPI Code, which appears within the recycling symbol on plastic containers, contains a plethora of information regarding each plastic type’s safety and biodegradability. Knowing how to classify used materials for recycling will be easier if you understand these codes. Here’s a rundown of the different codes for fast reference:

● Polyethylene Terephthalate
● Polyethylene with a high density
● Polyvinyl Chloride
● Low-Density Polyethylene
● Polypropylene
● Polystyrene
● Miscellaneous Plastics

Now let’s take a closer look at each of the seven varieties of plastic:

Polyethylene Terephthalate

Since 1940, PET polymers have been used to make beverage bottles, perishable food containers, and mouthwash. Clear PET plastics are generally regarded as harmless, however they can absorb aromas and flavours from the foods and drinks they hold. When exposed to heat, such as when a water bottle is left in a hot car, they can be harmful. As a result, antimony can leach out of the plastic and into the liquid over time. Fortunately, these plastics are easily recyclable and accepted by most recycling operations, making proper disposal simple. PET plastics are utilised in the manufacture of carpet, furniture, and winter clothing.

Polyethylene with a high density

HDPE is a relatively recent type of plastic, having been created in the 1950s by Karl Ziegler and Erhard Holzkamp. HDPE is the most commonly recycled plastic, and the FDA generally considers it safe for food contact. Because of its internal structure, HDPE is substantially stronger than PET and may be reused safely. It’s also suitable for objects that will be stored or used outdoors, as it can withstand both hot and cold climates. Leaching of HDPE products into foods or liquids is quite rare. Milk jugs, yoghurt tubs, cleaning product containers, body wash bottles, and other products contain this plastic. HDPE is also used to make many children’s toys, park chairs, planting pots, and pipes. Pens, plastic timber, plastic fencing, picnic tables, and bottles are all created from recycled HDPE.

Polyvinyl Chloride

It is one of the oldest polymers, having been discovered in 1838. PVC, often known as Vinyl, is a popular plastic that starts out stiff but becomes flexible after adding plasticizers. Credit cards, food wrap, plumbing pipes, tiles, windows, and medical equipment are all made of PVC, which is rarely recycled. PVC plastics include toxic compounds that have been linked to a number of illnesses, including bone and liver disease, as well as developmental difficulties in children and newborns. Food and beverages should be kept away from PVC objects. PVC is recycled in specialised programmes into flooring, panelling, and roadside gutters, to mention a few.

Low-Density Polyethylene

Because LDPE has the simplest structure of all the polymers, it is straightforward to manufacture. As a result, it’s commonly utilised for a variety of bags. Plastic wrap, frozen food containers, and squeezable bottles are all examples of LDPE, which is a very clean and safe plastic. Although more recycling services are beginning to accept LDPE plastics, recycling remains problematic. Garbage cans, panelling, furniture, flooring, and bubble wrap are all constructed from recycled LDPE.


PP, which was discovered in 1951 at a petroleum business, is a strong, robust material that can tolerate high temperatures. Tupperware, auto parts, thermal vests, yoghurt containers, and even disposable diapers include it because it’s considered a safe plastic. While it is recyclable, it is discarded far more frequently. Pallets, ice scrapers, rakes, and battery cables are all made from it when it’s recycled. PP is accepted by many recycling schemes.


PS, sometimes known as Styrofoam, was accidentally discovered in Germany in 1839. PS is a common plastic that can be found in drink cups, insulation, packing materials, egg cartons, and throwaway dinnerware. It’s inexpensive and simple to make, so it’s everywhere. It’s risky, too, because Styrofoam is known for seeping dangerous chemicals, especially when heated, and for being difficult to recycle. It’s normally discarded, like PP, though some recycling programmes may accept it. PS is used to make insulation, school materials, and licence plate frames, among other things.

Miscellaneous Plastics

SPI code 7 is used for all polymers that do not fall into one of the other six categories. These polymers include the hazardous chemical bisphenol A or BPA, which is found in common things such as eyewear, computer casings, nylon, compact discs, and infant bottles. Not only are these plastics toxic, but they’re also difficult to recycle since they don’t break down quickly. Plastic is typically recycled into plastic lumber and specialty items when it is accepted by recycling factories.

Suggested Read: Swachh Bharat

By Admin

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