Method for coating shells by adopting parylene vacuum coating technology

Abstract

The invention discloses a method for coating shells by adopting a parylene vacuum coating technology and relates to a shell coating method. The method comprises the following steps: classifying the shells, removing impurities, polishing the shells into shell base materials of a certain size, performing surface modification, putting the shell base materials subjected to modification treatment into special vacuum vapor deposition equipment, evaporating and sublimating solid-state raw materials of a certain mass under the condition of 120 DEG C / 1.3mPa, gasifying under the condition of 650 DEG C / 1.3mPa, performing carbon-carbon chain splitting on two side chains to generate stable activated monomers, and finally, introducing the two activated monomers into a deposition chamber in the state of room temperature 25 DEG C / 1.3mPa for performing polymerization and deposition, and performing flash polymerization on the shell base materials subjected to surface modification treatment to prepare a parylene film. According to the method, the problem that the shell decorative sheet is easy to oxidize and discolor and low in acid-base resistance and corrosion resistance is solved, and the method has good market prospects and application values.

Description

[0001] Technical field: [0002] The invention relates to a method for coating a shell, in particular to a method for coating a shell by adopting parylene vacuum coating technology. Background technique: [0003] Freshwater pearl cultivation and deep processing are pillar industries in some areas near lakes, which have developed rapidly in recent years. With the continuous expansion of freshwater pearl cultivation and processing scale, the environmental pollution caused by shell waste is becoming more and more serious. Therefore, how to deal with the shells in the process of production and processing has gradually become an important issue. With the rapid development of science and technology, people are paying more and more attention to the comprehensive development and utilization of shells, a renewable resource. The economic benefits are considerable. The development of shells The main methods of utilization include: using shells to make bead cores, providing bead cores f...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for coating shells with parylene vacuum coating technology, which effectively prevents shells from losing cuticle protection due to processing and grinding, and is caused by acid, water, oxygen, harmful chemicals, etc. At the same time, Parylene is vapor-phase deposited in a vacuum environment, so no matter whether the shell is a steep edge, a crack, or a tiny pinhole inner wall, it can penetrate effectively, and it is uniform everywhere, and The coated shell has strong acid and alkali resistance, moisture resistance, mildew resistance, corrosion resistance, high insulation, high and low temperature resistance and good biocompatibility, which completely solves the problem of easy oxidation, discoloration and resistance to ordinary pearl shell decorative boards. The problem of poor acid-base and corrosion resistance has a good market prospect and application value