Anti-counterfeiting adhesive tape with magnetic response and biodegradation functions as well as preparation method and application of anti-counterfeiting adhesive tape

Abstract

The invention discloses an anti-counterfeiting adhesive tape with magnetic response and biodegradation functions as well as a preparation method and an application of the anti-counterfeiting adhesive tape. One of a chitosan / polyacrylamide double-cross-linked network, a sodium alginate / polyacrylamide double-cross-linked network, a chitosan / polyacrylic acid double-cross-linked network and a sodium alginate / polyacrylic acid double-cross-linked network is formed on the surface of the base material film, wherein the network formed by chitosan or sodium alginate has biodegradability; meanwhile, Fe3O4 particles with magnetism are introduced into the four double-crosslinking networks, so that the modified base material film with excellent magnetic response and biodegradation functions is obtained, and therefore, the anti-counterfeiting adhesive tape prepared by adopting the modified base material film also has the magnetic response and biodegradation functions. According to the method, the whole operation steps are simple, and implementation feasibility is high; The modification process of the substrate film is carried out in a water-phase environment, so that environmental pollution is avoided.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting technology, in particular to an anti-counterfeiting adhesive tape with magnetic response and biodegradable functions, a preparation method and an application. Background technique [0002] With the rapid development of automobiles, digital products, rail transit, and electronic and electrical industries, the demand for laser anti-counterfeiting labels and markings has increased significantly. Therefore, there is a huge market demand for laser-markable anti-counterfeiting tapes used in the automotive field. Laser marking tape refers to a type of tape that can be engraved by laser engraving equipment to achieve permanent anti-tampering marks or item codes, also known as laser anti-counterfeiting labels. This type of laser marking tape is used in conjunction with laser engraving equipment to achieve good laser marking anti-counterfeiting functions by effectively absorbing laser energy. It is suitab...

AI Technical Summary

Problems solved by technology

First of all, the base material of the adhesive tape generally contains inorganic and organic mixed laser marking additives. Usually, the laser sensitive marking additive needs to be introduced into the base material by melt blending. Due to the poor blending compatibility of inorganic particles and the base material, the inorganic particles are easy to agglomerate. problems, the mechanical properties of the substrate film are affected or even decreased, which in turn affects the laser marking performance of the tape; secondly, because the EU has formulated strict environmental protection regulations for electronic products, products that do not meet the EU environmental protection requirements will face the dilemma of gradually withdrawing from the market , so anti-counterfeiting tapes used in electronic products have higher and higher requirements for biodegradability and environmental performance; thirdly, the current mainstream tapes are generally composed of base material layer, high temperature resistant layer, pressure sensitive adhesive layer and release paper, multi-layer structure The design concept of the tape is novel, but in fact the hierarchical structure is difficult to control, and the multi-layer structure will cause problems of bonding stability and function realization between layers, thereby reducing the overall performance of the tape, and the structure of the tape is becoming more and more simplified. The more necessary; finally, with the requirements of laser anti-counterfeiting and functional development, tapes need to have intelligent responses to environmental stimuli, and the development of biodegradable and intelligently responsive tape materials is also the focus of future development

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