What are the classifications of packing boxes?

According to product sales scope: domestic product packaging, export product packaging; According to the function of packaging in circulation, there are single packaging, medium packaging and outer packaging. According to the packaging materials, there are paper products packaging, plastic products packaging, metal packaging, bamboo and wood packaging, glass container packaging and composite material packaging; According to the number of packaging uses: one-time packaging, multi-use packaging and turnover packaging; According to the hardness of packaging containers, there are hard packaging, semi-hard packaging and soft packaging; According to product categories: food packaging, drug packaging, mechanical and electrical products packaging, dangerous goods packaging, etc. ; By function: transportation packaging, storage packaging and sales packaging; According to the packaging technology, there are shockproof packaging, moisture-proof packaging, rust-proof packaging and mildew-proof packaging. According to the packaging structure, it is divided into close-fitting packaging, blister packaging, heat-shrinkable packaging, portable packaging, tray packaging, combined packaging and so on.