In the world, with the need of global plastic ban and plastic restriction, plastic-free or biodegradable has become an inevitable trend. The treatment of common plastic is still incineration, which leads to a large amount of greenhouse gas emission into the air, compared with this, disposable biodegradable lunch boxes are buried in the soil for degradation, and the CO2 produced goes directly into the soil organic matter or plant absorption, not discharged into the air, without producing greenhouse effect.
Now let's take stock of the disposable biodegradable lunch boxes in the market.
A, pulp molding lunch box (plant fiber molding tableware)
Pulp molding tableware products have certain advantages in the process of bamboo teaspoon banning plasticization, first of all, raw materials, pulp molding disposable lunch boxes raw materials are wheat straw, bagasse and other plant fibers, the invention uses pulp molding wet pressing process, without adding PP material, adding food grade additives such as water and oil repellents in the pulp to achieve the effect of holding cold and hot food.
Vegetable oil degradation lunch box is currently the most active type of lunch box in the market, to take the lead in the ban on plastic in Hainan Province, for example, Hainan Province, a complete ban on the use, circulation, sale and storage of plastic tableware. Pulp molded tableware is undoubtedly an ideal substitute for plastic tableware.
Cane pulp disposable lunch boxes are fully degradable lunch boxes, which can be completely degraded in industrial composting or home composting and returned to nature after 90 days.
The second is the lunch box with corn starch.
Biodegradable corn starch lunch boxes made from natural corn starch and plant fiber as the base material, supplemented by bio-polyester, polyol and other raw materials processing.
The product can be naturally degraded in both soil and natural environment, and the degradation rate can reach 60%-80% according to the composition of the lunch box, which can replace plastic products to a certain extent and reduce the white pollution to the environment. It is an ideal substitute for the commonly used but controversial "sterilized tableware" in the catering industry.
Third, PLA biodegradable tableware.
PLA biodegradable tableware is generally a product that combines PLA composite film and pulp molding products in the pulp molding process, i.e. PLA covered products.
PLA composite film is a fully degradable film made of PLA as raw material and heated and laminated, which is suitable for pulp molding and paper products.
Polylactic acid (PLA) is a biodegradable material produced from starch raw materials produced from renewable plant resources (e.g. corn). This starch raw material is glycated to obtain glucose, then fermented by glucose and certain strains of bacteria to produce high purity lactic acid, and then synthesized by chemical synthesis method to synthesize PLA of certain molecular weight. It has excellent biodegradability and can be completely degraded by microorganisms in nature, eventually generating carbon dioxide and water, which will not pollute the environment and is a recognized environmentally friendly material.
Due to the advantages that PLA has, the combination of PLA with pulp molding products not only eliminates the use of water and oil repellents, but also can play a more important role in sealing the pores of pulp molding products, so that the original products that cannot be alcohol-proof cannot leak. At the same time, by sealing the air holes, tableware in the actual use of the process can reduce the permeability of the product, better insulation performance, longer insulation time.