Experts in the world have agreed to create a code to identify the maker of plastic materials. The goal of course to enable customers to identify safety hazards and containers made of plastic. This code is a number that is usually placed at the posterior packing in a triangular sign.
According to FPI Executive Director Henk Wibowo, codes were first issued in 1988 by The Society of Plastic Industry in the United States. Furthermore, many developing countries.
How to read the code?
Triangles indicate that plastic packaging is recycled. Then, the code numbers on the triangle intertwined with the letter which is on the bottom. "Numbers and letters indicate the type of plastic composition," said Henk. Until now, there are seven codes on plastic containers commonly used:
• Figures 1 - PET
This means that the plastic polyethylene terephthalate is composed dad. Packaging with this figure means that contain 30% PET. Usually these containers with clear or transparent material. Generally used for mineral water bottles, juice bottles, plastic or glass.
Plastic packaging with code 1-PET for single use only. We're not allowed to use it repeatedly. This material is not either to save some food and hot drinks "The heat will cause the polymer layer on the bottle migrate into food or drink," said Arif Hartoyo, expert in Food Technology from the Institute Pertanian Bogor (IPB).
• 2-HDPE
Plastic packaging material is made by high sensity polyethylene (HDPE). Plastic raw material is safe because it does not react to food or beverages. This material is strong, hard, opaque, and are more resistant to high temperatures so commonly used in stained white milk bottle milk, Tupperware, gallons of drinking water, and folding chairs.
Even so, the packaging is also not to be used repeatedly. For compound antimony trioxide to increase steadily over time and it is dangerous to our health.
• 3-V.
This is the abbreviation of polyvinyl chloride (PVC) containing in-2-ethyl-heksiladipat (DEHA), which can react with food. The content of DEHA easily migrate at a temperature of 15 degrees Celsius. This material is dangerous and difficult experience recycling. Usually this type used for plastic wrap (cling wrap)
• 4-LDPE
If you find this sign in the plastic, which means this material is made from low density polyethylene. This material is made from petroleum. Strong in character, somewhat translucent, flexible, and somewhat greasy surface. At temperatures below 60 degrees Celsius, very resistant to chemical compounds. Although a power protection against steam, water well, but less good for other gases such as oxygen.
• 5-PP
Packaging is made of polypropylene. Used in transparent bottles but not very clear or cloudy. Plastics of this type of character is stronger, lighter, with a low vapor permeability. So this kind of safe plastic for food packaging and beverage. "Plastics of this type are also resistant to fats and stable to high temperatures," said Arif.
• 6-PS
It is the mark of this packaging made from polystyrene (PS) or so-called polymer
aromatic. When meeting with the food or beverage, these materials can release styrene material. This material should be avoided as dangerous to the health of the brain, interfering with the female hormone estrogen which results in the problem of reproduction, growth and nervous system. It is better to directly burn when we find it.
• 7-other
This means that this material is composed of plastic materials other than the six mentioned above. Contents include styrene acrylonitrile (SAN), acrylonitrile butadiene styrene (ABS), polycarbonate (PC) and nylon.
The content contained on the SAN ordinary foods and beverages such as sports drink bottles, auto parts, household equipment, computers, electronic equipment, and plastic packaging.
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