Screen protector is a part of mobile accessory. There are varieties kinds of raw material for screen protector. We introduce 3 types of screen protector; PET film, TPU and tempered glass.
PET (polyethylene terephthalate) is a type of plastic. The polyester film has a scratch resistant matte coating on one side and a silicone adhesive on the other. The plastic gets easily discolored from the sun rays and oil build-up from the fingers
TPU (thermoplastic polyurethane) is chemically-enhanced plastic with properties including scratch resistance, oil and grease resistance, increased toughness and elasticity. Slight elasticity allows it to absorb non-extreme impacts. It suitables for a curved edge screen, but the protection is less stronger than glass.
Tempered glass screen protectors are the best among all the options. There are multiple layers; coating oil, glass, adhesive silicon. The glass thinkness 0.33mm is strongest protection and scratch resistance. Surface is quite smooth. There are an additional function for tempered glass. Such as anti-bacterial function, anti-spy, anti-blue light way.
By the way, selecting the suitable choice for your equipment.