Aqueous plastic-plastic compounding glue water for soft packaging and preparation method thereof

Abstract

The invention provides aqueous plastic-plastic compounding glue water for soft packaging, and relates to compounding glue water. The compounding glue water is prepared from the following ingredients in parts by weight: 20 to 30 parts of acrylic ester monomers, 1 to 5 parts of acrylic acid or methacrylic acid, 2 to 4 parts of alkyl methacrylate esters, 10 to 20 parts of styrene or acrylonitrile, 1 to 2 parts of acrylic acid hydroxyl esters, 0.2 to 1 part of N-Methylol acrylamide or diacetone-acryloamide, 1 to 5 parts of adipic dihydrazide, 0.4 to 0.8 part of itaconic acid, ethylene dimethacrylate or diallyl maleate, 0.3 to 1 part of emulsifying agents, 0.2 to 0.8 part of initiating agents, 0.1 to 0.3 part of buffering agents and 0.3 to 1 part of wetting agents. According to the material structure matching, the dry glue coating quantity per square meter can be controlled to be 0.5 to 2g, and the requirements can be met, for example, thin BOPP / CPP only needs 0.5 kg of dry glue, and the transparency and the firmness degree can reach the requirements; the cost of glue water used in per square meter is as low as 0.02 Yuan RMB; the product can be used on an original dry type compounding machine; the addition of equipment investment is not needed.

Description

Technical field: [0001] The invention relates to composite glue, in particular to a water-based plastic-plastic composite glue for flexible packaging and a preparation method thereof. Background technique: [0002] At present, about 90% of the adhesives used in the composite process of flexible packaging are solvent-based two-component polyurethane adhesives, 7-8% are solvent-free two-component polyurethane adhesives, and 2-3% are water-based adhesives. The composite process of the soft packaging industry consumes and directly discharges about 2 million tons of unburned solvents (ethyl acetate, toluene, industrial alcohols) into the atmosphere every year. The energy loss is quite serious, and at the same time it causes huge pollution hazards to the environment. In October 2015, the country formally passed the VOC Treatment Act, which fully collects pollution treatment fees for industrial solvent emissions. [0003] However, the difficulties of soft packaging companies are t...

AI Technical Summary

Problems solved by technology

[0003] However, the difficulties of soft packaging companies are that the lamination industry currently lacks water-based lamination adhesives with reliable performance to replace traditional solvent-based lamination adhesives. Solvent-free lamination is also in the exploratory stage. The economic loss caused by the production made many packaging companies stop; the original water-based composite glue (including various domestic manufacturers and international famous brands) has very limited adaptability to the substrate and cannot meet the overall requirements of the composite process. , it is easy to draw a conclusion from the current actual market share of water-based glue;