The paper cups were coated with a wax coating- Zhejiang Pando EP Technology Co., Ltd

The paper cups were coated with a wax coating

2022-12-09

Traditionally, paper cups were coated with a wax coating, which provided strength and leak protection. These days, a thin plastic coating is applied to the cup's body, ensuring its structure and appearance properties. The outer layer may also be coated to enhance heat sealability. However, these layers are not always necessary. In fact, it is suggested that multi-layered cups be made with the inner wall coated with several layers of the same material. The amount of coating that is necessary will depend on the final cost of the formulated coating.

In addition to polyethylene, paper cups may be coated with bioplastics such as polylactic acid (PLA). PLA is made from plant-based materials, and is renewable. However, the in-use cost of PLA is higher than that of PE. Therefore, PLA-coated cups have limited adoption in the paper coffee cup liner market. In addition, PLA has been shown to contaminate recyclable plastic streams. However, PE-coated paper cups can be recycled.

This blend of polyolefinic resins and calcium carbonate mineral provides an effective barrier that is equivalent to PE. Although the coating does not require significant modifications to existing coaters, it will require a heavy coatweight to achieve barrier properties. This will prevent blocking problems during the converting process.

Web Menu

Product Search

Language

Exit Menu

News