Disposable paper cups are daily necessities, especially in the catering industry, and they are widely used, but most disposable paper cups currently in use are non-degradable and easy to cause environmental pollution. Ordinary PHA Paper Cup and paper bowls are a kind of paper container made by mechanical processing white cardboard made of chemical wood pulp and covering a layer of polyethylene plastic film. However, polyethylene is not easy to degrade, which is not conducive to ecological and environmental protection.
In order to achieve the water insulation effect in the production of paper cups, a layer of polyethylene water insulation film will be applied to the inner wall. Polyethylene is the safest chemical substance in food processing. However, if the material selected is not good or the processing process is not good, polyethylene may be oxidized into a carbonyl compound in the process of melting or applying it to paper cups. Carbonyl compounds are not easy to evaporate at room temperature, but they may evaporate when a paper cup is poured into hot water, so people will smell strange. From the general theoretical analysis, long-term intake of this organic compound must be harmful to the human body.
PHA Paper Cup are usually made of starch extracted from plant resources. This material can be completely degraded by microorganisms in nature and converted into carbon dioxide and water without causing long-term pollution to the environment. However, the additives and technologies used in the production process will also affect their environmental protection properties. For example, if harmful chemicals are used in the production process, or if the degradation conditions of the product are very harsh, even if it can be degraded in the end, its environmental protection will be reduced. Degradable paper cups can only be degraded quickly under certain environmental conditions. In ordinary landfills, it may take 2-5 years for degradable paper cups to complete their degradation. In contrast, although traditional plastic products are not easy to degrade, in some cases, their degradation time may not be as long as expected. The production cost of degradable paper cups is usually higher than that of traditional plastic products, and the shelf life is shorter because the main material is starch. This may make it difficult to achieve large-scale production quickly in practical applications. If waste is not properly managed, even degradable products may not be properly treated, thus affecting their environmental protection. When considering the environmental protection of degradable paper cups, it is also necessary to consider whether there are better substitutes.
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