Judging from the latest mobile phone release on the market, mobile phone manufacturers are seeking new processes and materials, striving to differentiate in the mobile phone market, and gradually focusing on 2.5D and 3D composite plate mobile phone covers in product structure. At the same time, with the advent of the 5G era and the application of wireless charging technology, in order to meet the lighter, thinner and more personalized development direction of mobile phones and the higher requirements of 5G communication for signal transmission, composite materials (PC PMMA) have become new solutions to replace the traditional metal back cover of mobile phones with ceramics, glass, etc.
PC/PMMA composite board is made of PC and PMMA by co-extrusion. Because PMMA has good hardness and wear resistance, it is generally used externally, while PC has good toughness, so it is used as an inner layer. PC/PMMA composite board has the advantages of both PC and PMMA, which can not only meet the requirements of rigidity and decoration, but also meet the needs of wireless charging without shielding, and the cost is lower than 3D glass and ceramics. Through the ultra-high-pressure gas molding machine, coupled with the current plastic texture technology, it is enough to meet the requirements of appearance visually, and at the same time, it can fully meet the radio frequency requirements of 5G communication for signals.
