III. Structural design of paper cups
A. Inner coating technology of paper cups
1. Improvement of waterproofing and insulation properties
Inner coating technology is one of the key designs of paper cups, which can enhance the waterproof and thermal insulation performance of the cups.
In traditional paper cup production, a layer of polyethylene (PE) coating is usually applied inside the paper cup. This coating has good waterproof performance. It can effectively prevent beverages from penetrating the inside of the paper cup. And it can also prevent the paper cup from deforming and breaking. At the same time, PE coating can also provide a certain insulation effect. It can prevent users from feeling too much heat when holding cups.
In addition to PE coating, there are also other new coating materials widely used in paper cups. For example, polyvinyl alcohol (PVA) coating. It has good water resistance and leak resistance. So, it can better keep the inside of the paper cup dry. In addition, the polyester amide (PA) coating has high transparency and heat sealing performance. It can improve the appearance quality and heat sealing performance of paper cups.
2. Guarantee of Food Safety
As a container used to hold food and beverages, the inner coating material of paper cups must comply with food safety standards. This ensures that people can use it safely.
The inner coating material needs to undergo relevant food safety certification. Such as FDA (Food and Drug Administration) certification, EU food contact material certification, etc. These certifications ensure that the coating material inside the paper cup does not cause contamination to food and beverages. And it is also necessary to ensure that they do not release harmful substances, ensuring the health and safety of users.
B. Special structural design of paper cups
1. Bottom reinforcement design
The bottom reinforcement design of the paper cup is to improve the structural strength of the paper cup. This can prevent the paper cup from collapsing during filling and use. There are two common bottom reinforcement designs: a folded bottom and a reinforced bottom.
Folding bottom is a design made using a specific folding process at the bottom of a paper cup. Multiple layers of paper are locked together to form a strong bottom structure. This allows the paper cup to withstand a certain amount of gravity and pressure.
A reinforced bottom is a design that uses special textures or materials at the bottom of a paper cup to increase structural strength. For example, increasing the thickness of the bottom of the paper cup or using a more sturdy paper material. These can effectively enhance the bottom strength of the paper cup and improve its pressure resistance.
2. Utilization of container effect
Paper cups are usually stacked in containers during transportation and storage. This can save space and improve efficiency. Therefore, some special structural designs are applied to paper cups. This can achieve a better container effect.
For example, the caliber design of a paper cup can make the bottom of the cup cover the top of the next paper cup. This makes it convenient for paper cups to fit together and save space. In addition, a reasonable design of the height and diameter ratio of paper cups can also improve the stability of paper cup stacking. This can avoid unstable situations during the stacking process.
The inner coating technology and special structural design of paper cups can enhance their functionality and performance. Through continuous innovation and improvement, paper cups can better meet people's needs for Food contact materials. Moreover, it can provide a safe, convenient, and environmentally friendly user experience.