Roller die core and manufacturing method thereof

Abstract

The invention relates to a roller die core. The roller die core is used for molding an optical film. The roller die core comprises a roller, microstructures formed on the outer circumferential surface of the roller and a diamond-like carbon film formed on the surfaces of the microstructures. The invention also relates to a manufacturing method of the roller die core.

Description

technical field [0001] The invention relates to a roller mold core and a manufacturing method of the roller mold core. Background technique [0002] At present, the production process of optical films, such as prism sheets, is made by using ultra-precision engraved copper roller dies to emboss UV resin on PET (Polyethylene terephthalate, polyterephthalate plastic) carriers and curing them with light, which affects the yield rate. There are three main reasons: The first is the dust particles that may fall on the surface of the copper roller during production. Because the hardness of the hard copper plated is only about 220 Hv (Vickers hardness), when the roller continues to run, the dust particles It will be driven between the PET carrier and the wheel surface, and finally the surface of the copper roller will be scratched, resulting in poor optical quality of the finished optical film; the second is that the resin is easy to form residual glue on the copper roller during dem...

AI Technical Summary

Problems solved by technology

[0002] At present, the production process of optical films, such as prism sheets, is made by using ultra-precision engraved copper roller dies to emboss UV resin on PET (Polyethylene terephthalate, polyterephthalate plastic) carriers and then cured by light, which affects the yield rate. There are three main reasons: The first is the dust particles that may fall on the surface of the copper roller during production. Because the hardness of the hard copper plated is only about 220 Hv (Vickers hardness), when the roller continues to run, the dust particles It will be driven between the PET carrier and the wheel surface, and finally the surface of the copper roller will be scratched, resulting in poor optical quality of the finished optical film; the second is that the resin is easy to form residual glue on the copper roller during demoulding, although it can be added The release agent is used in the UV glue formula to overcome it, but this anti-sticking effect also reduces the adhesion of the cured resin colloid to the PET carrier, and finally reduces the 100-grid test level; thirdly, because the material of the roller is copper, exposure Copper oxide is easy to form in the atmospheric environment. When the area of ​​the oxide layer increases, it will cause microstructure damage. Finally, the roller must be re-engraved when it is scrapped.

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