Views：89 Writer：admin Date：2021-09-09
Due to the continuous development of plastic processing and modification technology, its application fields are rapidly expanding. In different application fields, the requirements for plastic surface decoration, material protection, and improvement of adhesion properties are getting higher and higher. However, the structure and composition of various plastic materials are different, and their surface properties are also significantly different. A variety of surface treatment technologies and products suitable for different purposes have emerged. PLASMA low-temperature plasma surface treatment equipment has also become one of the core equipment for the application of the pretreatment link of plastic processing modification technology.
Because the surface energy of most plastics is very low, many treatment methods, such as decoration, printing, spraying, etc., cannot be directly applied, and surface treatment is required first. When surface treatment of various materials, the combination of plastics and various materials is a key issue. Generally speaking, the adhesive properties of plastics are related to the structure and composition of the material.
Polyolefin materials, such as PP and PE, have very low surface energy, usually only 30-34 dyne. In order to achieve good bonding, the surface energy is generally required to be no less than 40. Combination experiments show that the bonding strength of PE after plasma treatment is increased by 10 times, and after ionization treatment, the bonding strength of PP is increased by 200 times.
Surface treatment is one of the key processes in the plastic spraying process. The quality of the treatment directly affects the adhesion of the coating and other technical indicators, especially PP. At present, methods such as combustion flame, plasma treatment, strong acid corrosion, etc., to improve the adhesion performance of PP or modified PP are all to improve the molecular structure of PP or modified PP, thereby enhancing the adhesion to the coating.
Because of the advantages of plasma processing speed, convenience, and pollution-free, it has become the first choice of many enterprises.