At present, straw is a common product in any country and any city, but straw brings convenience to people's life. At the same time, more and more discarded plastic straw and similar products begin to burden the environment.
Under the pressure of environmental protection and plastic limit, the conventional straw is facing challenges and elimination, so it is urgent to replace the environmental protection straw. The green and environmental protection degradable straw and paper straw also emerge as the times require.
PLA is a new type of biodegradable material, which uses renewable plant resources such as corn, cassava and other crops to extract starch. The raw material of starch is saccharified to get glucose, and then the glucose is metabolized and fermented by bacteria to produce high purity lactic acid, and then the high molecular weight polylactic acid is synthesized, and then processed into various biodegradable materials with good performance straw.
The paper straw is made of food grade paper and can be degraded in soil after several months.
After use, both straws can be completely degraded by microorganisms in nature, and eventually generate carbon dioxide (CO2) and water (H2O), which directly enter into the soil and become organic matter to be absorbed by plants. It will not cause greenhouse effect, and will not pollute the environment.
Features of two kinds of environmental protection straws:
Similarities:
1. The material is natural, non-toxic, high permeability, and will not release any substances harmful to human health;
2. After composting and burying treatment, it can be completely decomposed by microorganisms without any impact on the environment;
3. It can replace the traditional plastic straw based on petroleum, with the same usage, more environmental protection and health
4. Because the cost of environmental protection straw is higher than that of plastic straw, the price is slightly higher.
Differences:
The resistance temperature of PLA degradable straw is from - 10 ℃ to 80 ℃, which is close to that of traditional plastic straw. It has good stability and no plasticizer.
The tolerance temperature of paper straw is from - 10 ℃ to 40 ℃, and it is easy to dissolve when it is over 40 ℃, which will affect the taste of food, but the color is richer.
