The history and origin of the plastic bags

we often used for plastic bags, do you know * at the beginning of how they are made of? In the later development of a series of changes and how did they evolve? We are now people use plastic bags and what are the advantages and disadvantages? To bring you about all kinds of plastic bags.

this magical material & other; Ancestors & throughout; Is * rich cellulose in plants. In 1845, living in the northwestern city of Basel, Switzerland chemists ember once when doing the experiment in the home, accidentally bumped into a table of sulfuric acid and nitric acid, he quickly picked up his wife's apron cloth to wipe the table of the mixed acid. After the fuss, he will apron to dry on the hearth, lo apron & other; Robot & throughout; A burned up, immediately reduced to ashes. Plug ember with this & other; Discovery & throughout; Back to the lab, and constantly repeat & other; The accident & throughout; 。 After many experiments, plug ember finally found out the reason: the original cloth apron mainly of cellulose, it contact with the mixture of nitric acid and sulfuric acid, generated the cellulose nitrate ester, which is later widely used nitrocellulose. Ember found nitrocellulose plasticity, and that is impervious to manufactured with it. He interested with it made some beautiful bowls, cups, bottles and teapot. He admired his masterpiece, also specially to write to his friends that the famous scientist Michael Faraday. It's a pity that Faraday did not care about at that time, until the emergence of a photographer. Photography is one of the materials used in & other; Collodion cotton & throughout; It is a kind of & other; Nitrate cotton & throughout; Solution, that is, in the cellulose nitrate solution of alcohol and ether. When it is used in the light-sensitive chemicals stick on the glass, to make a similar to the equivalent of photographic film today. The photographer Alexander & middot; Parks have many hobbies, photography is one of them. In the 19th century, people could not like today also buy ready-made photographic film and chemical drugs, often have their own need. So each photographer must also be a chemist. Early plastic easy to catch fire, this limits the scope of manufacturing products with it. * a successfully is high temperature resistant plastic & other Baker Wright & throughout; （ The phenol beauty plastic & ndash; ) 。 Leo & middot; Rand baker in 1909 won the *.

plastic is a kind of very light material, with a very low temperature heat can make it soft, follow one's inclinationsly into various shapes. Plastic products colorful, light weight, not afraid to fall, economic and durable, it was not only to the life of people brought many convenient, also greatly promoted the development of industry. The invention of the plastic is less than 100 years, however, if the people at that time for the birth of their ecstatic, but now I have to deal with the flood in the life, the great threat to human survival environment and take great pains. At present, China plastic production for 3 o0 ten thousand tons per year, consumption in more than 6 million tons. The plastics, the annual output of 100 million tons, if the amount of plastic waste calculation by about 15% a year, year 15 million tons of plastic waste is all over the world, China in the more than 1 million tons of plastic waste, waste plastic in the garbage accounted for 40%, so a lot of waste plastic as garbage were buried in the ground, no doubt to have greater pressure on the lack of arable land. Plastic is extracted from oil or coal chemical petroleum products, once it is difficult to natural degradation. Plastic will not decay degradation in underground in 200, a large amount of plastic waste landfill in underground, can destroy the soil permeability, soil harden and affect the growth of plants. If the animals fed with the feed or remain in the field of plastic, can also cause death because of the digestive tract obstruction.

plastic in the life of people bring convenient while, also brought environment difficult to tidy up the future trouble, people called the plastic disasters to the environment & other White pollution & throughout; 。