[Chinese Packaging Network News] has "Southern Massachusetts Institute of Technology", known as KAIST, developed a new type of plastic film, as hard as glass, but also as elastic as plastic, is expected to accelerate the speed of the introduction of folding mobile phones, the fastest 2018 Can be listed in the year. The smart phone is covered with a glass substrate to protect the screen from external impact, and the glass is transparent and colorless without affecting the display color of the display. The problem is that the glass substrate cannot be bent or broken, and it is not suitable for folding smart phones.

In order to develop a collapsible mobile phone, the industry has replaced the glass substrate with a transparent plastic film. However, although the plastic film can be bent, its hardness is not enough to provide sufficient protection for the screen. Bae Byeong-soo, professor of KAIST's new material engineering department, announced that flexible hard coating technology has been developed to solve this problem. Silicone polymers are similar in hardness to glass and they are as elastic as plastic. They tested the monitor with inward folding and found that the new material has a hardness of 9H and can be bent more than 200,000 times. He said that this material can also be used to fold out the screen.

Prior to this, Kolon Industries of South Korea had developed a plastic film with KAIST's flexible hard coating technology that can strengthen the hardness of plastic films and accelerate the folding of commercial steps.