Vapor polishing is a process used to achieve a smooth, glossy, or transparent surface on plastic parts, such as polycarbonate (PC) and acrylic (PMMA) , by exposing them to a solvent vapor (usually is from a kind or chemical liquid). This technique is especially effective for removing tool marks, scratches, and rough edges left over from machining.
How Vapor Polishing Works:
1. Solvent Vapor Exposure:
The part is exposed to the vapor of a solvent (such as methylene chloride, acetone, or a mixture of these solvents) in a controlled environment.
The solvent vapor is heated to a point where it can soften the outermost layer of the plastic without affecting the entire part.
2. Surface Softening and Smoothing:
The vapor causes the surface of the plastic to soften slightly. As a result, the tiny scratches and marks on the surface are smoothed out by the vapor, leaving behind a glossy, clear finish.
The process works by selectively dissolving the outer layer, effectively polishing the material by removing imperfections at the microscopic level.
3. Controlled Environment:
The plastic part is usually suspended or placed in a vapor polishing chamber, where the solvent vapor is evenly distributed. The part must not come into direct contact with the liquid solvent to prevent distortion or other surface issues.
The part is exposed to the vapor for a specific amount of time, depending on the desired finish and the material type.
Advantages of Vapor Polishing:
Quick and Effective: Vapor polishing can provide a high-gloss, transparent finish much faster than manual polishing methods.
Uniform Finish: It helps create an even, smooth surface across the entire part, without the risk of inconsistencies.
No Scratches or Swirls: Unlike traditional polishing, vapor polishing eliminates the chance of leaving behind visible scratches or swirl marks.
