Low-temperature plasma surface modification treatment of EPDM rubber by plasma cleaner manufacturers:
EPDM is one of the main products of ethylene propylene rubber. It has the advantages of good aging resistance, excellent thermal insulation and outstanding ablation resistance, and its raw rubber density is less than 0.90kg/m3. High cost performance, it is an excellent thermal insulation material.
However, there are no polar groups in the molecular chain of EPDM rubber, and it is a weakly polar material. Therefore, its surface polarity is low, and there is a weak boundary layer, which leads to its poor bonding performance, especially more difficult to bond with metal.

Surface modification of EPDM rubber to improve its surface adhesion performance is a key technology to improve adhesion. In the traditional coating process, the use of artificial sandpaper to polish can improve its interface bonding performance, but this manual polishing method has uneven treatment effects such as uneven treatment.
Developed in the 1980s, low-temperature plasma treatment technology has received widespread attention due to its advantages such as fast, high efficiency, cleanliness, and no damage to the performance of the substrate itself. The plasma cleaning machine manufacturer manufactured by Chengfeng Zhizhi will introduce you to you below.
Low-temperature plasma processing technology generates ionized gas through low-voltage discharge, in which there are a large number of active particles. These active particles cause etching, activation, and cross-linking reactions on the surface of the material, thereby changing the surface properties of the material.
Using low-temperature plasma cleaner plasma to modify the surface of difficult-to-stick materials, and some good results have been achieved. Therefore, the use of low-temperature plasma treatment technology to improve the bonding performance of EPDM rubber is feasible both in theory and in practice.
There are obvious protrusions or grooves on the surface of EPDM rubber treated by an atmospheric plasma cleaning machine. This shows that low-temperature plasma has micro-etched on the surface of EPDM rubber, which roughens the surface, increases the specific surface area, and plays a positive role in enhancing the bonding strength.
The active particles in the low-temperature plasma interact with the surface of the EPDM rubber, transfer energy to the surface, increase the surface energy, and introduce polar groups on the surface to obtain a modification effect on the surface.
The concentration of the active particles in the low-temperature plasma treated with the atmosphere on the surface of the EPDM rubber, such as C=0, -COOH and -OH, is sufficiently large. Therefore, the hydrophilicity of the surface becomes better, which is manifested by a drastic decrease in contact angle and a drastic increase in surface energy.
The adhesion of EPDM rubber processed by a low-temperature plasma cleaning machine is better than that of manual sanding. This is because the low-temperature plasma treated with the atmosphere not only has a physical etching effect on the surface of the EPDM rubber, but also chemical reactions occur at the same time.
After low-temperature plasma treatment of EPDM rubber, polar groups are introduced on the surface and a relatively large roughness is formed, which greatly enhances the adhesion of EPDM rubber. However, manual polishing is only a physical method to improve the surface roughness of EPDM rubber.
Treatment of EPDM rubber with an atmospheric plasma cleaner can significantly reduce its contact angle and increase surface energy, and the atmospheric low-temperature plasma surface treatment technology basically does not damage the original mechanical properties of the material.