Oxygen-uptake oxygen-resistance type plastic beer bottle cap lining and processing method thereof

Abstract

The inner mat material of absorbing and preventing oxygen type beer bottle cap is disclosed. The first layer is obstruct layer, which a film coated by ethyl acetate solution of polyvinylidene chloride. The second layer is oxygen-absorbing obstruct layer, whose substrate is ethylene vinyl alcohol polymer obstruct resin in which the ethhyene content is 29-46%, the oxygen absorbing mother grains distributes in the said substrate, the weight percentage of pyridines and the like oxygen absorbent in the said obstruct resin is 0.0001-0.1%, the moisture of obstruct resin is 0.1-0.3% and the resin density is 1.14-1.21gram / cm3. First resolve polyvinylidene chloride using ethyl acetate solution to a transparent solution, equally spray the solution to coat on the inner surface of cap, which comes into the first obstruct layer by natural drying; secondly on the first obstruct layer the said polymer obstruct resin oxygen-absorbing layer is extruded.

Description

technical field [0001] The invention relates to a new type of sealing packaging material, in particular to an oxygen-absorbing and oxygen-resistant plastic beer bottle cap lining material and its processing technology. Background technique [0002] Patent ZL01105218.X discloses a process for making the oxygen barrier layer of beer bottle caps. The paste-like oxygen barrier material is transferred to the inner side of the bottom of the plastic cap through the transfer roller, and the process is repeated successively. A very thin layer of oxygen barrier layer is formed on the inner side of the cap bottom. layer, the oxygen barrier layer dries up after a short period of time, this kind of paste oxygen barrier material has great instability, it is difficult to form a uniform and round gasket, and the gasket after curing is not ideal strength. The oxygen barrier layer of the existing beer bottle cap inner pad is made of polyvinylidene chloride material. [0003] Domestic iron-b...

AI Technical Summary

Problems solved by technology

[0003] Domestic iron-based oxygen absorbers have a history of many years, but iron-based oxygen absorbers do not meet the food hygiene requirements for direct contact with food, and can only exist in food packaging in the form of isolation bags

In addition, the oxygen absorbents used in the treatment of pure water in thermal power plants are usually hydrazine and hydrazine, which are obviously not suitable for food packaging