At present, there are three main types of disposable paper cups on the market: one is made of white cardboard, which is mainly used to hold dry things and cannot hold water and oil; the second is a wax-coated paper cup, which is a It has been soaked in wax, so it is more waterproof and thick, but as long as the temperature of the water in the cup exceeds 40 ° C, the wax will melt, and the wax contains carcinogenic polycyclic aromatic hydrocarbons; the third is the paper-plastic cup that is commonly used now, the outside is a layer of paper, and the inside is a layer of coated paper. The quality of the coated paper determines whether the paper cup will produce harmful substances during use. PLA coated paper is made of 100% corn plastic PLA raw material, without any additives, and 100% PLA raw material is coated on the paper.
The environmentally friendly biodegradable coated paper for producing eco paper cups is composed of upper, middle and lower layers. The surface of the paper layer is provided with grooves. Because the utility model adopts biodegradable plastics instead of polyethylene, the full biodegradation of paper cup products can be realized, and the impact and damage of paper cups on the environment can be solved. The utility model designs groove structures on the upper surface and the lower surface of the paper layer, which increases the surface area of the paper cup and also increases the connection strength between the paper layer and the upper and lower barrier layers. This is a new type of environmentally friendly coated PLA paper cups.
Polylactic acid (PLA) is a new type of biodegradable and environmentally friendly material made from starch raw materials proposed by renewable plant resources such as corn. Starch raw material is saccharified to obtain glucose, and then fermented from glucose and certain strains to produce high-purity lactic acid, and then chemical synthesis method is used to synthesize polylactic acid with a certain molecular weight. It has biodegradable and compostable thermoplastic material, which uses plants as the main source of raw materials; 100% completely biodegradable materials obtained by extraction, fermentation and polymerization can be completely destroyed by microorganisms in nature in a composting environment. Degraded into carbon dioxide and water needed for plant growth. PLA coated paper has good biodegradability and does not pollute the environment, which is very beneficial to protect the environment and is recognized as an environmentally friendly material.
Compared with traditional PE coated paper products, coated PLA paper cups can be recycled after use. The special and diversified recycling methods of renewable resources can greatly reduce the burden on natural resources and the environment. In line with the ever-growing green cycle guidelines.