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By goodvin | 12 October 2023 | 0 Comments

Lapping Film FAQs

Lapping Film FAQs

Lapping film, also known as microfinishing film or polishing film, is a type of abrasive material used in various applications for precise material removal and surface finishing. It consists of a thin, flexible sheet coated with abrasive particles, adhered to either one or both sides.

1. What is Lapping Film? 
Lapping Film is a smooth grinding film used for polishing and grinding precision optical instrument parts such as fiber optic end faces and connectors. It consists of grinding particles evenly distributed on a thin film substrate.
2. What is the basic structure and working principle of Lapping Film? 
The basic structure of Lapping Film consists of two parts: grinding particles and a resin or polyester film substrate. Its working principle is to continuously grind the grinding particles on the fiber optic end face or connector surface to make it smooth and achieve the purpose of polishing.
3. What are the common types of Lapping Film? 
The common types of Lapping Film can be divided into the following categories according to the particle size of the grinding particles: Coarse grinding film: with a particle size of 3um or more, used for rough grinding. Medium grinding film: with a particle size of 0.3-3um, used for further grinding after rough grinding. Fine grinding film: with a particle size of 0.05-0.3um, used for fine polishing. Ultra-fine grinding film: with a particle size of less than 0.05um, used for ultra-precision polishing. According to the substrate, it can also be divided into polyester film and polyimide film.
4. How to choose the right Lapping Film? 
The selection of Lapping Film needs to consider the following factors: Particle size: Select the coarse grinding, medium grinding, fine grinding, or ultra-fine grinding model according to the accuracy requirements of the polishing process. Substrate material: Choose polyester or polyimide film according to the ambient temperature. Polyester is suitable for room temperature, and polyimide can withstand high temperatures. Adhesion: Choose the appropriate adhesion according to the material of the workpiece to be polished. Excessive adhesion will make it difficult to replace the film. Size specification: Choose the appropriate specification of Lapping Film according to the size of the workpiece.
5. What tests are required for Lapping Film? 
The common test items for Lapping Film include: Particle size distribution test: test the particle size range and distribution of the grinding particles to ensure uniformity. Thermal expansion coefficient test: test the expansion of the film at high temperatures to ensure size stability. Adhesion test: test the adhesion between the film and the fiber optic or connector, which should not be too large or too small. Polishing flatness test: use a surface smoothness detector to test the surface smoothness of the film after polishing. Life test: determine the optimal service life through multiple service life tests.

The above five FAQs provide a detailed introduction to the basic knowledge of Lapping Film, including structure, types, selection principles, and testing requirements. Lapping Film plays an important role in fiber optic production and optical device manufacturing.

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