The emergence of new technologies and new processes has continuously improved the manufacturing technology of paper cups, and new types of paper cups will appear and play a greater role in promoting and promoting the variety of products. Distinguish between cold drink cups and hot milk tea cups. They “perform their duties”. Once “displaced”, they will threaten the health of consumers. The surface of cold drink paper cups should be treated with wax spraying or soaking wax. Because cold drinks will cause water on the surface of the paper cup, the paper cup will soften, and it will be waterproof after being coated with wax. This wax is very stable and safe at temperatures between 0 and 5°C. The following briefly introduces how the heat insulation effect of the paper cup is.
Some companies have such a misunderstanding: the larger the weight of the paper inside, the more the heat insulation and compressive strength of the paper cup can be increased, but this is not the case. To enhance the thermal insulation and compressive strength of the paper cup, the thermal insulation of the outer cup must be enhanced. As long as there is no trace of corrugation after the surface paper is pasted, the paper with lower weight can be used as much as possible; the core paper and corrugated paper are best used Straw pulp or wood pulp paper with good stiffness and high ring compressive strength. Do not use medium-strength or normal-strength tile paper, because it is mostly a mixture of raw pulp and recycled pulp, which has fast water absorption, low ring pressure strength, and good toughness but low stiffness.
But if it is used to hold hot drinks, as long as the temperature of the beverage exceeds 62℃, the wax will melt and the paper cup will absorb water and deform. The melted paraffin wax has a high impurity content, especially the polycyclic phenhydrocarbon organic compound contained in it, which is a possible carcinogenic substance. Entering the human body with the beverage will endanger human health. The surface of the hot drink paper cup will be pasted with a special polyethylene film recognized by the country not only has good heat resistance, but also is non-toxic when immersed in high-temperature beverages. The above is the heat insulation effect of the corrugated cup for everyone.