三房巷(600370.SH)：产品瓶级聚酯切片广泛应用于软饮料、食用油及调味品等包装材料领域

Group 1 - The company Sanfangxiang (600370.SH) produces bottle-grade polyester chips widely used in packaging materials for soft drinks, edible oils, and condiments [1] - PTA is identified as the main raw material for polyester fiber, polyester bottle chips, and polyester films [1] - PBT engineering plastics are extensively applied across various industrial sectors, including electronics, automotive, telecommunications, home appliances, and transportation [1]