The selection of cleanroom grades in the food-grade paper and plastic industry depends on the cleanliness requirements of the production process. Commonly used grades are ISO 8 (100,000), ISO 7 (10,000), and, for key processes, ISO 6 (1,000).
Core levels and applicable scenarios
ISO 8 (100,000) suits regular paper-plastic product production, like forming and cutting containers and tableware for standard food packaging. This grade controls airborne particles, meets hygiene requirements, and prevents contamination from environmental dust.
ISO 7 (10,000) is for processes needing higher cleanliness, such as printing, lamination, and making packaging that directly contacts cleaner foods. It lowers the risk of pollution from ink and adhesive residues and ensures product safety.
ISO Level 6 (1000) : It is only applicable to the production of special high-end products, such as food-grade paper-plastic packaging for medical accessories and paper-plastic consumables for high-precision food testing, etc. It can meet extremely high clean control requirements and prevent the influence of micro-particles and microorganisms on the product.
Supplementary requirements
In addition to meeting the grade standards, cleanrooms should also be equipped with temperature and humidity control, ventilation and filtration systems, and hygiene and disinfection facilities. At the same time, in line with the HACCP system requirements of the food industry, it is necessary to ensure that the entire production process complies with the safety standards for food contact materials.