As of 2021 that I know, HDPE (High Density Polyethylene) material is a fairly popular choice in baby playpens. HDPE is a strong, durable and easy-to-clean plastic material commonly used to make a variety of household items and children's products.
The application of HDPE materials in baby fences mainly has the following advantages:
Safety: HDPE material is non-toxic and harmless, meets food-grade safety standards and will not cause harm to the health of babies.
Durability: HDPE material has high wear and impact resistance, can withstand baby's activities and collisions, and is not easy to deform or break.
Easy to clean: HDPE material has a smooth surface, does not absorb stains, and is easy to clean and disinfect, which is very important for baby's hygiene and health.
Customizability: HDPE materials can be processed into various shapes and colors through injection molding and other processes, and can be customized according to the design needs of the baby playpen.
However, it is important to note that the information I have provided is as of 2021, and material selection for playpens may vary depending on region, market demand, and technological innovation. Before purchasing a playpen, it is recommended that you consult your local baby store or professional for the latest market trends and advice.