What are the main components of the disposable degradable lunch box? What materials are most of the degradable lunch boxes?
Posted on Jan 29.2022
With the current global plastic ban and limit requirements, non plastic or degradable has become an inevitable trend in the future. The treatment method of ordinary plastics is still incineration and cremation, resulting in a large number of greenhouse ga
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With the current global plastic ban and limit requirements, non plastic or degradable has become an inevitable trend in the future. The treatment method of ordinary plastics is still incineration and cremation, resulting in a large number of greenhouse gases discharged into the air, while disposable degradable lunch boxes are buried in the soil for degradation. The generated carbon dioxide directly enters the soil organic matter or is absorbed by plants and will not be discharged into the air, No greenhouse effect.
Today, let's take stock of disposable degradable lunch boxes on the market.
1、 Pulp molded lunch box (plant fiber molded tableware)
Pulp molded tableware products have certain advantages on the road of plastic prohibition. Firstly, in terms of raw materials, pulp molded disposable lunch boxes take wheat straw, bagasse and other plant fibers as raw materials without adding any PP materials. They are formed through pulp molding wet pressing process, and add food grade additives such as waterproof and oil proof in the pulp to achieve the effect of holding cold and hot food.
Plant fiber degradable lunch box is the most active type of lunch box in the market at present. Taking Hainan Province, which took the lead in banning plastic tableware, as an example, Hainan Province comprehensively prohibits the use, circulation, sales and storage of plastic tableware. Pulp molded tableware has undoubtedly become an ideal plastic substitute.
Sugarcane pulp disposable lunch box is a fully degradable lunch box, which can be completely degraded into organic matter and return to nature in 90 days under the condition of industrial composting or household composting.
2、 Corn starch based lunch box
Corn starch degradable lunch box is made of natural corn starch and plant fiber as the base material, supplemented by biological polyester, polyol and other materials.
Corn starch lunch box can be degraded naturally in soil and natural environment. The degradation rate can reach 60% - 80% according to the composition of the lunch box. To a certain extent, it can replace plastic products and reduce white pollution to the environment. It is an ideal substitute for the widely used but controversial "sterilized tableware" in the catering market.
3、 PLA degradable tableware
PLA degradable lunch box usually refers to the combination of PLA composite film and pulp molded products in pulp molding process, that is, PLA coated products.
PLA composite membrane is a completely degradable membrane produced and processed from polylactic acid, which can be compounded on pulp molding and paper products by heating.
Polylactic acid (PLA) is a new biodegradable material, which is made of starch raw materials proposed by renewable plant resources (such as corn). Glucose is obtained from starch raw material through saccharification, and then high-purity lactic acid is produced by fermentation of glucose and certain bacteria, and then polylactic acid with certain molecular weight is synthesized by chemical synthesis method. It has good biodegradability. After use, it can be completely degraded by microorganisms in nature, and finally produce carbon dioxide and water, which does not pollute the environment, which is very beneficial to environmental protection. It is recognized as an environment-friendly material.
In view of the advantages of PLA, the combination of film covering process and pulp molding products can not only save the use of waterproof and oil proof agent, but also better seal the pores of pulp molding products, so that the products that can not prevent alcohol can prevent alcohol leakage. At the same time, after sealing the pores, the tableware reduces the air permeability of the product in the actual use process, has higher heat preservation performance and longer heat preservation time.
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