What should we pay attention to when choosing raw materials for paper bowls

The production process of paper bowls involves multiple links, among which the selection of raw materials is crucial. The main raw material of paper bowls is base paper, and its quality directly affects the performance and safety of the final product. High-quality chemical wood pulp is the first choice for making high-end paper bowls. This type of wood pulp is usually made by professional pulp and paper mills through fine processes to ensure that the length, strength and purity of its fibers meet high standards. For high-end paper bowls, imported high-grade wood pulp is widely used due to its superior physical properties. Mid-range products can use domestic ordinary wood pulp, while low-end products may use short-fiber pulp such as bagasse pulp, straw pulp or bamboo pulp. However, no matter what kind of pulp is selected, it is crucial to ensure the purity of the fiber. The presence of impurities not only affects the appearance of the paper bowl, but also may become a breeding ground for microorganisms, thereby reducing the hygiene performance of the paper bowl.

In the process of raw material selection, hygiene indicators are of paramount importance. The heavy metal content in base paper must be strictly controlled within a safe range, especially heavy metals such as lead, cadmium, and mercury. If the content of these heavy metals exceeds the standard, they may migrate into food during the use of paper bowls, and long-term intake will cause serious damage to the human nervous system and digestive system. In addition, the content of fluorescent substances also needs to be strictly tested. Excessive fluorescent substances may pose a potential threat to human health. Microbial indicators should not be ignored either. The base paper must ensure that there are no pathogenic microorganisms, such as coliform bacteria and salmonella, to prevent food poisoning and other health problems during use.

In addition to base paper, the selection of materials used for processes such as coating and lamination is also crucial. Polyethylene film is a common coating material, and its quality directly affects the waterproof and hygienic properties of paper bowls. High-quality polyethylene film must meet relevant hygiene standards and have good heat resistance and chemical stability to avoid releasing harmful substances at high temperatures or when in contact with food. At the same time, auxiliary materials such as adhesives used in the production process should also be non-toxic and harmless products to ensure the overall safety of paper bowls.

Environmental performance also plays an important role in the selection of raw materials. With the improvement of public environmental awareness, consumers' demand for environmentally friendly paper bowls is increasing. Therefore, when selecting raw materials, priority is given to renewable and biodegradable materials, such as recycled paper fiber, bagasse or bamboo. These materials not only reduce dependence on virgin resources and reduce environmental impact, but also conform to the concept of sustainable development. For example, bamboo, as a natural material, has excellent biodegradability and safety. In the process of making paper bowls, bamboo can achieve waterproof and oil-proof effects without adding too many chemicals. Its hardness is also better than that of paper bowls, which is suitable for consumers with high quality requirements.