What measures are taken to prevent contamination of optical films during the Secondary Slitter slitting process?

To prevent contamination of optical films during the Secondary Slitter slitting process, several measures are taken. These measures are implemented to ensure the final product is free from any particles or contaminants that may affect its optical properties. Here are some of the steps taken to prevent contamination:

Clean environment: The secondary slitting process is carried out in a cleanroom environment to minimize the presence of airborne contaminants. Cleanrooms are designed to control temperature, humidity, and air cleanliness levels. The air is filtered to remove particles, and personnel entering the cleanroom wear protective clothing, such as gowns, gloves, and masks, to prevent the introduction of contaminants.

Proper handling: Optical films are extremely sensitive to dust particles, fingerprints, and other contaminants. Operators involved in the slitting process are trained to handle the films using clean gloves to prevent direct contact with the surface. They must also avoid touching any nonessential surfaces and double-check for cleanliness before proceeding.

Pre-slitting cleaning: Prior to the slitting process, the optical films are thoroughly cleaned using approved cleaning solutions and lint-free wipes. This removes any surface contaminants such as dust, oils, or residues that may have accumulated during prior manufacturing stages. Special care is taken to use cleaning solutions that are compatible with the film material to prevent any damage.

Machine maintenance: Regular machine maintenance is performed to ensure the slitting equipment is clean and in optimal condition. This includes cleaning of cutting blades and rollers to remove any particle buildup or adhesive residue. Proper lubrication is also important to prevent any contaminants from being introduced into the process.

Quality control checks: Throughout the slitting process, frequent quality control checks are performed. This involves inspecting the film for any visual defects or foreign particles. Automated inspection systems may also be used to identify and remove any contaminants present on the film surface after slitting.

Packaging and storage: Once the optical films are slit, they are carefully packaged in clean, dust-free containers or rolls. Special anti-static packaging is often used to prevent the attraction of dust particles. The packaged films are then stored in a controlled environment to maintain their cleanliness until further use or shipment.