Device and method for removing peculiar smell of zinc sulfide laser dielectric film

Abstract

The invention discloses a device and a method for removing peculiar smell of a zinc sulfide laser dielectric film. Only foreign gases on the surface of the zinc sulfide laser dielectric film can be extracted in the conventional method, and SO2 and H2S gases cannot be completely effectively removed. The device for removing the peculiar smell of the zinc sulfide laser dielectric film is characterized by comprising an unreeling rack, a desulfurization tank, a clean water tank, an oven and a reeling rack which are sequentially arranged front and back; a pH tester connected automatic liquid adding device is arranged above the desulfurization tank; the clean water tank is provided with a water spraying and cleaning device; a wiping device for removing redundant water is arranged above the water spraying and cleaning device; and a desulfurizing agent Na2HPO4 solution is filled in the desulfurization tank. By the device and the method, the SO2 and the H2S in the zinc sulfide laser dielectric film can be effectively cleared, and the requirement of a tobacco packaging material for smell can be met, so that the zinc sulfide laser dielectric film can be applied to tobacco packaging.

Description

technical field [0001] The invention relates to a device and method for removing the peculiar smell of a zinc sulfide laser dielectric film. Background technique [0002] Zinc sulfide (ZnS) has excellent physical properties, has a unique light effect, and its reflectivity is as high as 2.35-2.37. As a high-gloss coating material, it is more and more used in the packaging field. [0003] Zinc sulfide (ZnS) dielectric film has two major characteristics: the laser pattern after plating has a bright metallic feel, and the laser effect is more obvious. The main advantage is that the laser surface can be compounded with other paper and plastic materials after plating, and the laser graphics will not be affected. The composite laser material has the advantage of laser pattern friction resistance, which is not available in other transparent laser films without dielectric coating. However, zinc sulfide laser medium packaging materials have a pungent smell similar to rotten eggs, an...

AI Technical Summary

Problems solved by technology

However, zinc sulfide laser dielectric packaging materials have a pungent smell similar to rotten eggs. The problem of odor has always been a technical barrier that limits the application of this coating material in packaging, especially for tobacco and food packaging. It is strictly required that packaging materials have no odor

[0009] In order to solve the above problems, people have proposed the vacuum negative pressure removal method and the water washing dissolution method, but the above two processes can only remove the impurity gas on the surface of the coating film. Completely and effectively remove SO 2 and H 2 S gas

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