Glass
Good protection, good optical properties, and expensive price;
High brittleness, difficult to bend, and prone to warping when bent;
The requirements for glass are extremely strict in the field of flexible displays.

PET
Universality, strong design functionality, and affordability;
Poor protection, easy to scratch, and poor fingerprint unlocking;
The terminal shipment volume is large, and there are many multi-layer composite structures.

TPU
Good flexibility, optical grade, easy to achieve full lamination;
Non aliphatic compounds exhibit yellowing and crystal point defects;
The market growth is large, suitable for curved and foldable phones.

GPU
Combining rigidity and flexibility, with excellent shape memory and self-cultivation performance;
Excellent optical properties, no yellowing, and resistance to high and low temperatures;
Good resilience, good protection, suitable for flexible screens.