Release film plays an important role in the production of double-sided tape, and it is required for die-cutting double-sided tape.
The key points for controlling the quality of release film include coating uniformity, high residual adhesion, flatness, and high cleanliness. Manufacturers generally control the quality of release film from the following four points.
1. Uniformity of coating: To achieve uniform coating of release film, in addition to selecting appropriate solvents, controlling the concentration, viscosity, and solvent evaporation time of the coating agent, coating equipment is crucial. Most domestic coating factories do not have very good control over solvent based silicone oil. The rainbow phenomenon usually occurs, and in addition to enhancing the technical and analytical capabilities of coating, the technical services of silicone oil factories also need to be strengthened.
2. High residual adhesion: In addition to being affected by the silicone oil formula, coating conditions, and substrate treatment, the technical services of silicone oil factories also need to be strengthened.
3. Flatness: Coating equipment for flatness is crucial, and the formulation of silicone oil is also crucial. Most domestic coating factories do not have very good control over solvent based silicone oil.
4. Cleanliness: There are several parts that need to be controlled to improve the cleanliness of the product. Firstly, the cleanliness and dust removal device of the base film. Secondly, the setting of the dust-free workshop. Thirdly, the dust removal setting of the slitting equipment. Improving the cleanliness of the product can actually reduce the occurrence of heavy peeling of the release film

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