- Life Style
- What are single- and double-proof disposable biodegradable lunch boxes? What is a pulp molded plastic laminated lunch box?
Non-proof pulp molded products.
It refers to the molded products that are not waterproof and oil-proof, mostly used for electronic lined products, which do not require waterproof and oil-proof characteristics for such packaging.
Single-proof pulp molded products.
Generally refers to waterproof products, adding a certain proportion of waterproofing bamboo teaspoon agent (divided into food grade and industrial grade) in the pulp can play a waterproof role, waterproof temperature ranging from -18 degrees to 100 degrees.
Single-proof products are mostly used in agricultural disposable seedling cups, some fruit pulp trays, meat pulp trays, etc.
Double-proof pulp molding products.
It refers to adding a certain proportion of water and oil repellant to the pulp to make the product water and oil repellent. Waterproof effect is generally between -18 degrees to 100 degrees; oilproof effect ranges from a few degrees to 220 degrees. Double anti products can be used for microwave heating and oven baking. Double anti products are mostly used in food packaging tableware.
Fourth, laminated products. It is the process of adding or not adding any additives to the molded products, the composite film and molded products combined through the lamination process. The laminated film has strong tensile force, and the laminated product can be better insulated, reduce the temperature and dissipate heat through the stomata of the molded product, while reducing the viscosity of rice, dumplings and other foods, and greatly reducing the use of water repellents and oil repellents.
Laminated films are generally divided into PP, PE, PET, CPET, PBAT, PLA, etc. At present, the commonly used laminated films are mainly PLA and PBAT. PLA is a new type of biodegradable material made from starch raw materials proposed by renewable plant resources (such as corn).
Therefore, China is currently unable to produce it for technical reasons, relying mainly on imports from the United States, Japan, Germany and Taiwan Province, which are expensive and limited in quantity;.
PBAT is a copolymer of butylene adipate and butylene terephthalate, which has the properties of PBA and PBT, good ductility and elongation at break, good heat resistance and impact resistance
In addition, it has excellent biodegradable properties and is one of the very active research and best degradable materials in the market for biodegradable plastics. It is much less expensive than PLA and can be produced in China. Therefore, PBAT is the most widely used and widely applied composite material in molded products.