Process for improving adhesive force of coating layer

Abstract

The invention discloses a process for improving the adhesive force of a coating layer, belongs to the technical field of vapor deposition, and aims to solve the problems that the existing parylene coating layer is low in adhesive force and easy to fall off due to non-uniform adhesion of a coupling agent in the early stage and non-uniform thickness of the coating layer during vapor deposition. Putting the workpiece into a drying oven, and drying and cleaning water vapor adsorbed on the surface of the workpiece; putting the workpiece into an evaporation reaction tank of a coating machine; sealing the reaction tank, vacuumizing to adsorb the silane coupling agent through the sponge, putting the sponge into the reaction tank, and carrying out coupling agent evaporation coating according to the requirements of a coating machine; adding parylene into the reaction tank, and carrying out vapor deposition to coat parylene according to the requirements of a coating machine; deflating the system and taking out the workpiece. The silane coupling agent is adsorbed through the sponge, the distribution area is increased, steam is evenly distributed in the reaction tank cavity, the coupling agent is evenly coated on the surface of a workpiece in an evaporation mode, then parylene is coated in a vapor deposition mode, and the adhesive force of a coating layer is improved.

Description

technical field [0001] The invention relates to the technical field of polymer nano vapor deposition, in particular to a process for improving the adhesion of a coating layer. Background technique [0002] Organic polymer nano-films can protect products against wear, corrosion, and acid and alkali. They are often used for the protection of rubber, silica gel, and plastic products. They are usually used for vapor deposition coating on the surface of rubber, silica gel, and plastic products. However, the current Parylene vapor deposition coating layer has the following deficiencies: 1. The current coupling agent is directly added dropwise in the evaporation reaction tank, and the amount of coupling agent added is small , the steam content is small, and it is difficult to evenly distribute to the inner cavity of the reaction tank, which leads to the inability of the coupling agent to be evenly evaporated on the surface of the workpiece, and the parylene coating layer formed by ...

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Problems solved by technology

[0002]Organic polymer nano film can protect products from wear resistance, corrosion and acid-base protection. It is often used for the protection of rubber, silica gel and plastic products. It is usually used to protect the surface of rubber, silica gel, and plastic products by vapor deposition coating of parylene coating. However, the current parylene vapor deposition coating coating layer has the following shortcomings: 1. The current coupling agent is directly dripped In the evaporation reaction tank, the amount of coupling agent added is small, the steam content is small, and it is difficult to evenly distribute into the inner cavity of the reaction tank, resulting in the inability of the coupling agent to be evenly evaporated on the surface of the workpiece, and the parylene coating formed by subsequent coating The adhesion of the coating layer is low, and the coating layer is easy to fall off, which affects the anti-corrosion effect; 2. During the current vapor deposition coating, the workpiece is fixed in the inner cavity of the reaction tank, and the evaporation steam is difficult to evenly wrap the surface of the workpiece, resulting in the coating layer. Uniform, poor adhesion

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