卫生巾为防渗漏，质地和工艺要复杂许多——由棉、纸、人造化纤等多种材质，采取缝制或压制而成，这才能保证结构紧密。虽方便了使用者，却大大增加了降解难度 In order to prevent leakage, the texture and technology of sanitary napkins are much more complicated. They are made of cotton, paper, man-made chemical fiber and other materials, and are sewn or pressed to ensure a tight structure. Although it is convenient for users, it greatly increases the difficulty of degradation.