How to Distinguish HDPE and LDPE Plastic Bags?
The Advantages of the LDPE Plastic Bags Low-density polyethylene is the lightest variety among polyethylene resins. Compared with high-density polyethylene, its crystallinity (55%-65%) and softening point (90-100℃) are lower; it has good flexibility, elongation, transparency, cold resistance and processability; its chemistry Good stability, resistance to acid, alkali and salt solutions; good electrical insulation and air permeability; low water absorption; easy to burn. It is soft in nature, with good extensibility, electrical insulation, chemical stability, processing performance and low temperature resistance (-70℃). The Disadvantages of LDPE Plastic Bags The disadvantage of LDPE is its poor mechanical strength, moisture barrier, gas barrier and solvent resistance. The molecular structure is not regular enough, the crystallinity (55%-65%) is low, and the crystal melting point (108-126℃) is also low. Its mechanical strength is lower than that of high-density polyethylene, and its im