Completely biodegradable anti-counterfeiting plastic bag and preparation method thereof

Abstract

The invention discloses a completely biodegradable anti-counterfeiting plastic bag and a preparation method thereof. The completely biodegradable anti-counterfeiting plastic bag includes, by weight, 100 parts of completely biodegradable plastic and 0.1-20 parts of anti-counterfeiting masterbatch. The anti-counterfeiting masterbatch includes, by weight, 30-99.9% of completely biodegradable plastic, 0.01-15% of a fluorescent powder, 0.01-65% of a coding material and 0-3.25% of an auxiliary; and the completely biodegradable plastic is more than one selected from PBS, PBAT, PBSA and PBST. The preparation method is as below: conducting extrusion molding on completely biodegradable plastic and the anti-counterfeiting masterbatch to a coextrusion head by using a large extruder and a small extruder respectively; extruding the completely biodegradable plastic from the large extruder; extruding the anti-counterfeiting masterbatch from the small extruder; and extruding a double color bubble tube, and conducting blowing, traction, printing, rolling, bag making and notching. By adopting specific coextrusion film blowing process, the anti-counterfeiting strip and the completely biodegradable plastic bag are combined into one body to gain good binding force; the production process is simple and easy for processing and moulding and mass production; and according to the fluorescent features and coding information on the anti-counterfeiting strip, authenticity and traceability of the completely biodegradable plastic anti-counterfeiting plastic bag can be realized.

Description

technical field [0001] The invention relates to the field of plastic products, in particular to a completely biodegradable anti-counterfeit plastic bag and a preparation method thereof. Background technique [0002] Plastic is a chemical petroleum product extracted from petroleum or coal. Once it is produced, it is difficult to degrade naturally. Plastic will not rot and degrade after being buried in the ground for 200 years. A large amount of plastic waste is buried in the ground, which will destroy the permeability of the soil. , so that the soil compaction, affecting the growth of plants. Traditional garbage bags are made of plastic. Urban life produces a lot of garbage every day. The use of a large number of garbage bags not only brings convenience to people, but also increases the pressure on environmental protection. Therefore, on the one hand, the government actively guides the public to no longer Use or use less plastic bags. On the other hand, manufacturers have ac...

AI Technical Summary

Problems solved by technology

[0006] But for the existing anti-counterfeiting means, its anti-counterfeiting mark is only printed, embedded, coated or pasted on the garbage bag body, rather than integrated with the garbage bag body, which will easily cause the anti-counterfeiting mark to be uncovered or damaged separately, thus The anti-counterfeiting function of the anti-counterfeiting label of the garbage bag is destroyed, the traceability of the garbage bag cannot be realized, and the cost of the anti-counterfeiting label is relatively high

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