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Indeed, the habits we have re-fill plastic bottles. The reason, I discard the packaging that is still good. In fact, not all plastic bottles can be used again. Health dangers lurk behind the packaging of plastic bottles that filled repeatedly. Ranging from skin irritation, hormone disruption, cancer and respiratory channels. 
And, not only are plastic bottles lho, which should not be used repeatedly. Products such as plastic food container, cover food to milk bottles, also need to be. 

Code Bookmarks 
Then find out how the plastic packaging which can and can not be used again? Generally, each container or plastic dicantumi sign the code number that indicates the creation of plastic packaging. Code number is in the recycling logo and the triangle shape can be found at the bottom or the bottom of the pack. 

These codes are issued by The Society of Plastic Industry in 1998 in the United States and adopted by the institutions of the system code, such as ISO (International Organization for Standarization). The goal, to make it easier to identify hazards and consumer safety container made of plastic. Nah, plastic tag itself is divided into 7 groups. What is the meaning behind the numbers? 

Figures 1 
The sign is usually accompanied by any posts PET (polyethylene terephthalate). Plastics of this type of clear or colored transparent and widely used for mineral water bottles, juice, and almost all other soft drink bottles. To note is with the bottle material is recommended only onetime. Why? First, the design on the bottle's narrow neck makes it difficult to clean. Long run from the hand and the bacteria can grow in the mouth bottles. Second, when used too often, let alone used to store hot water or heat, will cause the layer of polymer melt in the bottle and remove these substances karsinogenik (which can cause cancer) in the long term. 

Figures 2 
Generally, this code along with any posts HDPE (high density polyethylene). This type of plastic materials have a stronger, harder, more opaque and resistant to high temperatures. Ordinary bottles used for packaging milk, white, gallons of drinking water, folding chair, and others. HDPE is one of the plastic material used as a safe plastic womb is able to prevent chemical reaction between the plastic packaging of food or drink that dikemasnya. However, the same as PET, HDPE is also only recommended for use once only. Section, to make the PET and HDPE used antimoni trioksida compound. Chemical compound is easy to enter the body through the respiratory. Compound contamination in the long period will cause skin irritation and respiratory channels. For women, this compound can increase menstruasi problems and miscarriage. 

Figures 3 
This is the type of plastic the most difficult to be recycled. In the plastic packaging that contains this type is usually stamped logo recycling (sometimes red) with the number 3 in the middle and any posts which means that V PVC (polyvinyl chloride). Plastics can be found on the wrapper (wrap) and some bottled water packaging. This type of dangerous to health because it contains DEHA (Di-2-ethyl-heksiladipat) that can react with the food when brush directly. DEHA can be melted at a temperature of 15 degrees celsius. Reactions that occur between the PVC is packed with food that is harmful to plastic kidney, liver and a decrease in body weight. As much as possible avoid use of this type of plastic. Search only other alternative wrapping of plastic such as polyethylene or natural materials, such as a banana leaf or leaf teak. 

Figures 4 
Usually the code is written with LDPE (low density polyethylene). Plastic characters this strong, somewhat translucent, flexible surface with slightly fatty. Made from petroleum and used for the regular food, plastic packaging, and bottles of soft. At temperatures below 60 degrees Celsius, this plastic is very resistant to chemical compound. Proteksinya power against moisture are good. However, less well for the gases such as oxygen. Plastics are difficult destroyed but can be recycled. This material both for the food because it is difficult to react with the chemical food dikemasnya. 

Figures 5 
Tulisann PP (Polypropylene) usually present with this figure. Characteristics of plastic is stronger, that is not transparently clear or cloudy, with light penetrating power of steam is low, have good resilience against fat, stable against high temperature and quite shiny. PP is the best type of plastic materials and safe, especially for the food and drink such as a store of food, bottled water and most important for baby milk bottles and plastic container that can be heated in the microwave. Look to the container code numbers when you buy 5 items of plastic packaging to store various foods and beverages. 

Figures 6 
Made of plastic material types of PS (polystyrene). PS common material used as a place to eat styrofoam, water use, and others. Polystyrene is an aromatic polymer that can remove material styrene when food is in contact with vessel. Besides the food, styrene can also be obtained from cigarette smoke, smoke and vehicle construction building materials. This material should be avoided, as dangerous for health brain, the hormone estrogen in women result in reproductive problems, nervous system and growth. In addition, the plastic material is difficult to be recycled because the process requires a very long and long. 

Figures 7 
Usually accompanied by any posts OTHER. This type of plastic that is 4 PC (polycarbonate), SAN (styrene acrylonitrile), ABS (acrylonitrile butadiene styrene), and Nylon. OTHER can be found in the sports drink bottles, car parts, household equipment, computers, electronic equipment, and plastic packaging, bottle, glass five (sippy cup), polikarbonat drink bottles, cans and packaging, including tins of milk formula. 

In fact the PC is not recommended as the venue because it can remove the main material, Bisphenol A in food and beverages. Effect, can damage the hormone system, the chromosome ovarium, the decline in sperm production, and change the function of immunity. While SAN and ABS both used as packaging for the resistance against high temperature and chemical reactions. SAN is usually found in the bowl miksaer, wrapping vacuum, dishes, cutlery, coffee filters, and toothbrushes. While the ABS material is used as toys and lego pipe. 

So, it's wise to use plastic as a container. Cermati code number, do not forget to check the author! 

Erma Dwi Kusumastuti 
  
(Source: www.kompas.com)