Plastic bags become popular in the 1960s. They were created by the common plastic, Polyethylene. Polyethylene was not used as common as we use now in the early 1930s. Although, in the 1930s no chemist knew how to make high-density polyethylene. Celloplast filed for a US patent of the design of a plastic bag to sell. Their idea was to seal the plastic, but create a hole to put items in the plastic. It was not until 1965 when Celloplast was granted the patent.
Plastic bags started using plastic bags in 1979. The popular grocery stores Kroger and Safeway began using them in 1982. Plastic bags are cheap and still used to today, because of the availability. It's even said that paper costs more than the bags. Which benefited many markets and supermarkets. To replace the paper bags which saved companies money. By 1985, 75% of companies were using plastic bags instead of paper bags. |