III. Materials and manufacturing process of lining coating
Cup lining coating is a protective layer that protects the interior of ice cream paper cups. The commonly used types of lining materials are as follows.
A. The type of material used for the lining coating of paper cups, such as polyester, polyethylene, etc
1. Polyethylene
Polyethylene is widely used in the lining coating of paper cups because of its excellent waterproof and oil resistant properties, as well as its low cost. Thoes make it suitable for the production of large-scale ice cream paper cups.
2. Polyester
Polyester coatings can provide higher levels of protection. Thus, it can prevente odor, grease penetration, and oxygen penetration. Therefore, polyester is typically used in higher quality high-end paper cups.
3. PLA (polylactic acid)
PLA has poor waterproof performance, but it is associated with environmental protection and is widely used in some high-end markets.
B. Introduce the manufacturing process, such as special coating techniques and welding
The manufacturing process of the lining coating for paper cups is as follows:
1. Special coating technology
In the production process of paper cups, the lining coating is widely used to ensure the waterproof and oil resistant effect of the cups. The method of ensuring that the coating is evenly distributed throughout the entire cup is to use modern injection technology. Firstly, the formed sediment is captured and prepared, and then injected into the inside of the paper cup.
2. Welding
In some cases, special technical coatings are unnecessary. In this case, the inner lining of the paper cup can use heat sealing (or welding) technology. This is a process of pressing multiple layers of different materials together, keeping the inner lining and cup body tightly together. By providing a reliable protective layer, this process ensures that the paper cup is durable to a certain extent and will not leak.
The above is an introduction to the types of materials and manufacturing processes for the lining coating of paper cups. Materials such as polyethylene and polyester are suitable for different grades of paper cups. And special coating technology and welding manufacturing processes can ensure the quality and performance of the paper cup lining.