Environmentally-friendly prismatic stripping-difficult corrugated carton

Abstract

The invention discloses an environmentally-friendly prismatic stripping-difficult corrugated carton which comprises a carton body consisting of corrugated boards, wherein each corrugated board is formed by adhering case board paper with corrugated paper through an adhesive; a preparation method of the adhesive comprises the following steps: uniformly placing corn starch into a product case, performing aerobic irradiation by applying gamma ray radiated from a 60Co radiation source through a dynamic irradiation mode, then taking out the irradiated starch, uniformly stirring and mixing the starch, adding water, and stirring and dispersing the mixer into starch paste; slowly adding PVA into water, stirring the PVA at 90 DEG C in a heat preservation manner till the PVA is completely dissolved,cooling to 60 DEG C, and adding an initiator for stirring reaction for 20 to 40 min, so as to obtain a PVA glue liquid; uniformly mixing the starch paste with the PVA glue liquid, then adding a boraxsolution for stirring reaction for 30 to 40 min, adjusting the pH value of the composite glue liquid to 6 to 7 by using a sodium hydroxide solution, and continuously enabling the solution to react for1 to 2 h, so as to obtain the environmentally-friendly adhesive. According to the environmentally-friendly prismatic stripping-difficult corrugated carton, through the adoption of the gamma-ray modified starch, the process is easy to operate, and modification is easy to control; the product quality is higher than that of chemically modified starch, and the cost is lower than that of the chemically modified starch.

Description

technical field [0001] The invention belongs to the technical field of carton production, and relates to a corrugated carton, in particular to an environment-friendly corrugated carton with a corrugated shape that is difficult to peel off. Background technique [0002] Corrugated boxes are made of corrugated cardboard, also known as corrugated cardboard, which is made of at least one layer of corrugated paper and one layer of cardboard paper, which has good elasticity and extensibility. It is mainly used in the manufacture of cartons, the sandwich of cartons and other packaging materials for fragile goods. There are many types of corrugated cardboard adhesives. Among them, the existing starch adhesives have high bonding strength, good moisture resistance, safety and non-toxicity, and are widely used. Traditional starch adhesives use chemical agents to oxidize starch. , but the chemical method generally has some characteristics, such as unstable product quality, uneven react...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of environmental protection and good adhesive performance of adhesives for corrugated boxes, the invention provides an environmentally friendly corrugated box with corrugated shapes that are difficult to peel off. The adhesive for the carton is a modified starch-PVA adhesive, wherein Modified starch is prepared by high-energy radiation technology. Starch will degrade when irradiated by γ-rays, accompanied by oxidation, hydrolysis and other processes. It does not need to add initiators, thus avoiding the shortcomings of chemical methods, and the process is simple to operate, Modification is easy to control, product quality and cost are better than chemically modified starch; at the same time, after the modified starch is mixed with PVA, the adhesion is significantly improved