High-strength composite single corrugated board and preparation method thereof

Abstract

The invention relates to the technical field of packaging materials, in particular to a high-strength composite single corrugated paperboard and a preparation method thereof. The high-strength composite single corrugated paperboard comprises a composite single corrugated paper core, surface paper and inner paper, and the surface paper and the inner paper are fixedly bonded to the upper surface and the lower surface of the composite single corrugated paper core; the method comprises the following steps: preparing a corrugated paper core, preparing a composite single corrugated paper core, preheating the surface paper and the inner paper, compounding a corrugated board and coating a waterproof coating; an adhesive used in the above steps is a modified protein-starch composite adhesive, wherein the adhesive is prepared from the following raw materials in parts by weight: 40 to 60 parts of defatted soybean powder or degreased cotton seed powder, 8 to 15 parts of modified starch, 180 to 400 parts of water, 1 to 4 parts of modifier, 4 to 20 parts of cross-linking agent and 0.2 to 0.5 part of mildew preventive. The preparation method is simple, efficient, environmentally friendly, non-toxic, low in cost and suitable for large-scale production, and the prepared corrugated board is high in compressive strength and bonding strength, stable in structure and not prone to corrugation deviation.

Description

Technical field [0001] The invention relates to the technical field of packaging materials, and in particular to a high-strength composite single corrugated cardboard and a preparation method thereof. Background technique [0002] In recent years, corrugated cartons have stood out in the field of packaging materials with their advantages of light weight, shock-proof buffering, foldability, environmental protection and recyclability. However, the commonly used corrugated cartons in China are set up with multi-layer corrugated stacks to improve the load-bearing and pressure resistance of corrugated cartons. Capacity, the corrugated cartons prepared by this type of structure consume a lot of materials, are costly and take up a lot of space. Therefore, in the pursuit of high load-bearing load and high compressive strength of corrugated cartons, the development trend of lightweight has led to the development and design of corrugated cartons. Another challenge. At present, most o...

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Problems solved by technology

[0002] In recent years, corrugated cartons stand out in the field of packaging materials due to their advantages of light weight, shockproof cushioning, foldability, and environmental protection and recyclability. capacity, the corrugated box prepared by this type of structure consumes a lot of materials, costs high and takes up a lot of space. Therefore, in the pursuit of high load-bearing load and high compressive strength of corrugated boxes, the development trend of lightweight has great impact on the development and design of corrugated boxes. another challenge of

At present, most of the interlayers of corrugated boxes are bonded by adhesives. The adhesive strength, stability, water and heat resistance of the adhesive directly affect the load-bearing compressive strength and service life of corrugated cardboard or cartons. Starch glue Adhesives, vegetable protein adhesives, etc. are potential adhesives due to their good biocompatibility, non-toxic, tasteless and low price, but they generally have poor water resistance, poor corrosion resistance and weak adhesion. and other problems seriously restrict its industrial application

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