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Do you know the history of the development of paper cups?
The growth process of paper cup history has gone through four stages:
Conical/Pleated Paper Cups The paper cups that first came out were conical, handmade, glued together, easier to separate, and had to be used as quickly as possible. Later folding paper cups added folds to the side walls to increase the strength of the side walls and the durability of the paper cups, but it was difficult to print patterns on these folded surfaces, and the effect was not ideal.
waxed paper cup
In 1932, the first wax-coated two-piece paper cup came out, and its smooth surface could be printed with various exquisite patterns to enhance the promotion effect. Waxing the paper cup, on the one hand, can avoid the direct contact between the beverage and the paper, and can protect the adhesiveness of the glue and enhance the durability of the paper cup; on the other hand, it also increases the thickness of the side wall, which greatly improves the strength of the paper cup, thereby reducing the The amount of paper necessary to make stronger paper cups reduces production costs.
As waxed paper cups become a container for cold beverages, there is also a desire for a convenient container for hot beverages. However, the hot beverage will melt the wax layer on the inner surface of the paper cup, and the adhesive joint will be separated. Therefore, the general waxed paper cup is not suitable for holding hot beverages.
Straight wall double layer cup
In order to expand the application scope of paper cups, in 1940, straight-wall double-layer paper cups were introduced to the market. This paper cup is not only easy to carry, but also can be used to hold hot beverages. Later, the manufacturer coated these cups with latex to cover up the "cardboard smell" of the paper and to enhance the leak-proofness of the paper cups. Single-layer wax-coated cups with latex coating are widely used in self-service vending machines to hold hot coffee.
Plastic coated paper cups
Some food companies are beginning to coat polyethylene on cardboard to increase the barrier and sealing properties of paper packaging. Since the melting point of polyethylene is much higher than that of wax, the new beverage paper cups coated with this material can ideally be used to hold hot beverages and solve the problem of affecting product quality due to the melting of the coating material. At the same time, the polyethylene coating is smoother than the original wax coating, improving the appearance of the paper cups. In addition, its processing technology is cheaper and faster than the method using latex coating.
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