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Plastic takes a big part in our life even in this world. It is not only a daily wraping agent use by human but also a substitute goods for human's damage organs.

Plastic is a very efficient thing but behind that it keeps some secret which give bad impact to human.
The experts in the world divided plastics into some codes which will help us to differentiate them.

Code - 1 PET ( polyethylene terephthalate )

Commonly, it makes from transparent material , use for mineral bottle or plastic glass.
Plastic with code-1 could only being use once, avoid reuse it. Besides that, it does not good for foods and beverages storage because heat will cause polymer from bottle imigrate to the foods and beverages.

Code - 2 HDPE ( high sensity polyethylene )

Almost safe to use due to no reaction with food and beverages will occured. Generally, this material is stronger, harder, not clear and resist in high temperature. Baby's milk bottle and chair are some examples. However, repetation in using is not allowed.

Code - 3 V ( polyvinyl chloride )

Imigration is happen at the temperature of 15 degree celcius. Dangerous and hard to recycle. Avoid using this kind of plastic, it should cause kidney and heart disease even obesity.
We could find it at cling wrap.

Code - 4 LDPE ( low density polyethylene )

Made from oil that obtain from earth . Have a strong, flexible, transparent character. Resist to chemical compound while under 600 degree celcius. Although it has a high protection power towards vapour, it still not good for oxygen.

Code - 5 PP ( polypropylene )

The best material of plastic, suitable for food and beverage especially for baby's milk bottle which is quite sensitive in case of health.
This no-transparent plastic have a good defense to fat and stable in high temperature.

Code - 6 PS ( polystyrene )

PS is an aromatic polymer which could spread styrene into foods when contact occured. Moreover, styrene could be obtained from cigarette vapor as well as vehicle vapor and building-construction materials. Styrene is could also precarious for brain, act as disturbance agent to women which result to reproduction trouble, growth and neurosurgeons.
Even it could be recycle still it could take a very long process and time.

Code - 7 Other

It divided into 4 types which are :

• SAN ( styrene acrylonitrile )
• ABS ( acrylonitrile butadiene styrene )
• PC ( polycarbonate )
• Nylon

Commonly used for vehicle spare-parts, household tools, computer & electronic parts and plastic bags.
SAN and ABS have a high resistance through chemical and temperature reaction. SAN and ABS are quite safe for foods and beverages.
Different to PC, which could be found at sippy cup, foods and beverages can. PC spreads Bisphenol-A into foods even beverages which are potential to damage hormone system, to decrease production of sperm and to change imunity function.

** sources : various