Plastic bag development historyⅢ
Continue to develop Parker's results and profit from it for other inventors to do. John Wesley Hayat, a New York-based printer, saw this opportunity in 1868 when a company that made billiards complained about a shortage of ivory. Hyat improved the manufacturing process and gave a new name for "Paxin" - "Celluloid". He got a ready market from the billiards maker and soon made a variety of products from plastic.
Early plastics tended to catch fire, which limited the range of products that could be made with it. The first plastic that can successfully withstand high temperatures is Beckett. Leo Baekeland received the patent in 1909.
In 1909, Bakeland of the United States first synthesized phenolic plastics. In the 1930s, nylon came out and was called "composite by coal, air and water, finer than spider silk, harder than steel, and superior to silk." Their emergence laid the foundation for the invention and production of various plastics for this purpose. Due to the development of the petrochemical industry in the Second World War, plastic raw materials replaced coal with oil, and the plastics manufacturing industry also developed rapidly.
Plastic is a very light substance. Heating it at a low temperature can make it soft, and it can be made into various shapes as you wish. Plastic products are colorful, light weight, not afraid of falling, and economical and durable. The advent of it not only brings convenience to people's lives, but also greatly promotes the development of industry.
However, the invention of plastics was less than 100 years old. If people were ecstatic at the time of their birth, they had to take great pains to deal with these things that flooded people's lives and brought great threats to the living environment of mankind.
Supermarkets say NO to plastic bags in 2008.
Plastics are chemical petroleum products extracted from petroleum or coal that are difficult to degrade naturally once produced. Plastics buried in the ground for 200 years will not rot and degrade, and a large amount of plastic waste will be buried in the ground, which will destroy the permeability of the soil and cause soil compaction and affect plant growth. If livestock accidentally eats mixed feed or plastic that remains in the wild, it can also cause death due to digestive tract obstruction.