PORON is a trademark of high-density polyurethane foam produced by the American ROGERS company. Since ROGERS is the pioneer and promoter in this field, his trademark PORON is widely used in the industry and later became the One type of product is commonly known as PORON. Also using this trademark is R.I.C, a joint venture between ROGERS and INOAC. This is the American and Japanese regulations. In addition, there are NANOCELL products produced by South Korea's S&K, which are also similar products. It is the source of Korean PORON. Later, UTIS (now owned by ROGERS) appeared, and there are also brand products such as SAINT-GOBAIN DRC.