A biodegradable and environmentally friendly corrugated paper adhesive

Abstract

This invention discloses a biodegradable and environmentally friendly corrugated paper adhesive, belonging to the field of adhesive technology. The adhesive of this invention is made from the following raw materials in parts by weight: 30-51.4 parts starch, 3-7 parts sodium hydroxide, 0.3-0.8 parts borax, 0.5-3 parts stabilizer, 0.5-2 parts carboxymethyl pachyman, 0.5-1 part tetrasodium iminodisuccinate, and 100-200 parts water. This invention achieves the effective preparation of a biodegradable, environmentally friendly, and highly adhesive adhesive suitable for corrugated cardboard production, which is beneficial to promoting the ecological transformation of the packaging industry.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, and more specifically, to a biodegradable and environmentally friendly corrugated paper adhesive. Background Technology

[0002] Corrugated cardboard is the base material for manufacturing various corrugated boxes. It is generally a sheet-like material formed by bonding linerboard and corrugated core paper together (using adhesives). Currently, traditional adhesives used to bond the layers of corrugated cardboard often contain harmful substances such as formaldehyde, are difficult to degrade, and are not environmentally friendly. While starch-based adhesives are biodegradable, their bonding performance is not ideal and cannot fully meet industrial requirements. Developing a corrugated cardboard adhesive that simultaneously meets the requirements of biodegradability, environmental friendliness, and bonding performance would be of significant importance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a biodegradable and environmentally friendly corrugated paper adhesive.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A biodegradable and environmentally friendly corrugated paper adhesive, which is made from the following raw materials in parts by weight: 30-51.4 parts starch, 3-7 parts sodium hydroxide, 0.3-0.8 parts borax, 0.5-3 parts stabilizer, 0.5-2 parts carboxymethyl poria cocos polysaccharide, 0.5-1 parts tetrasodium iminodisuccinate, and 100-200 parts water.

[0006] The present invention is further configured such that the starch is a mixture of cassava starch and corn starch.

[0007] The present invention is further configured such that the starch is tapioca starch and corn starch in a mass ratio of 1:0.6-1.

[0008] The present invention is further configured such that the stabilizer is sodium carboxymethyl cellulose.

[0009] The present invention is further configured such that the adhesive is made from the following raw materials in parts by weight: 37 parts starch, 4 parts sodium hydroxide, 0.3 parts borax, 0.9 parts stabilizer, 1.5 parts carboxymethyl poria cocos polysaccharide, 0.7 parts tetrasodium iminodisuccinate, and 150 parts water.

[0010] The present invention is further configured to dissolve sodium hydroxide in a portion of water to prepare a sodium hydroxide solution, add starch, stir and mix at 60-80℃ for 20-50 minutes, then add the remaining water, borax and stabilizer in sequence and continue mixing, then add carboxymethyl poria cocos polysaccharide and tetrasodium iminodisuccinate at below 60℃ and continue mixing, and after cooling, obtain a biodegradable and environmentally friendly corrugated paper adhesive.

[0011] The present invention is further configured such that the mass ratio of water added in the two preparation processes is 1:4-9.

[0012] In summary, the present invention has the following beneficial effects:

[0013] This invention significantly improves the adhesive strength and biodegradability of a glue by combining corn starch and tapioca starch with components such as sodium hydroxide, borax, and sodium carboxymethyl cellulose. In particular, the addition of carboxymethyl poria cocos polysaccharide and tetrasodium iminodisuccinate further enhances biodegradability and bonding strength, reducing the risk of environmental residue. The overall formula is non-toxic and biodegradable, suitable for corrugated cardboard production, and balances high-strength bonding with green sustainability requirements, thus contributing to the ecological transformation of the packaging industry. Detailed Implementation

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] The biodegradable and environmentally friendly corrugated paper adhesive of this invention is made from the following raw materials in parts by weight: 30-51.4 parts of starch (preferably a mixture of cassava starch and corn starch, more preferably a mixture of cassava starch and corn starch in a mass ratio of 1:0.6-1), 3-7 parts of sodium hydroxide, 0.3-0.8 parts of borax, 0.5-3 parts of stabilizer (preferably sodium carboxymethyl cellulose), 0.5-2 parts of carboxymethyl poria cocos polysaccharide, 0.5-1 parts of tetrasodium iminodisuccinate, and 100-200 parts of water.

[0016] Sodium hydroxide is dissolved in some water to make a sodium hydroxide solution. Starch is added and stirred at 60-80℃ for 20-50 minutes. Then, the remaining water (the mass ratio of the two water additions is 1:4-9), borax, and stabilizer are added in sequence and stirred until homogeneous. Then, carboxymethyl poria cocos polysaccharide and tetrasodium iminodisuccinate are added below 60℃ and stirred until homogeneous. After cooling, a biodegradable and environmentally friendly corrugated paper adhesive is obtained.

[0017] Example 1

[0018] Dissolve 4 parts by weight of sodium hydroxide in 20 parts by weight of water to make a sodium hydroxide solution. Add 37 parts by weight of starch and stir at 80°C for 30 minutes. Then add 130 parts by weight of water, 0.3 parts by weight of borax, and 0.9 parts by weight of sodium carboxymethyl cellulose and continue stirring. Then add 1.5 parts by weight of carboxymethyl poria cocos polysaccharide and 0.7 parts by weight of tetrasodium iminodisuccinate at 50°C and continue stirring. After cooling, a biodegradable and environmentally friendly corrugated paper adhesive is obtained.

[0019] Comparative Example 1

[0020] The adhesive was prepared according to Example 1, except that carboxymethyl poria cocos polysaccharide was not added.

[0021] Comparative Example 2

[0022] The adhesive was prepared according to Example 1, except that tetrasodium iminodisuccinate was not added.

[0023] Comparative Example 3

[0024] The adhesive was prepared according to Example 1, except that carboxymethyl poria cocos polysaccharide and tetrasodium iminodisuccinate were not added.

[0025] The adhesives prepared in Example 1 and Comparative Examples 1-2 were subjected to performance tests (adhesion test: the adhesive was coated between the layers of corrugated paper with a coating thickness of 50 μm, and a 50 μm aluminum foil was used as the backing material for the test; curing time measurement: 2g of adhesive sample was taken, placed on a heating plate, and continuously stirred at 125℃ until the adhesive was completely cured and the required time was recorded; degradation rate: the corrugated paperboard bonded with the adhesive was cut into 3cm×3cm pieces, buried in the soil, and the weight change was recorded. The degradation rate was obtained by the proportion of weight reduction). The results are shown in Table 1. As can be seen from Table 1, the corrugated paper adhesive of the present invention has good degradability, high bonding strength, fast curing, and good stability, meeting the requirements of production, use, and environmental protection.

[0026] Table 1

[0027]

[0028] Comparative Example 4

[0029] The adhesive was prepared according to Example 1, except that sodium carboxymethyl cellulose was used to replace carboxymethyl poria polysaccharide by mass.

[0030] Comparative Example 5

[0031] The adhesive was prepared according to Example 1, except that disodium ethylenediaminetetraacetate was used in place of sodium iminodisuccinate by mass.

[0032] Tests revealed that the complete curing times of the adhesives in Comparative Example 4 and Comparative Example 5 were 322s and 309s, respectively.

[0033] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A biodegradable and environmentally friendly corrugated paper adhesive, characterized in that, The adhesive is made from the following raw materials in parts by weight: 30-51.4 parts starch, 3-7 parts sodium hydroxide, 0.3-0.8 parts borax, 0.5-3 parts stabilizer, 0.5-2 parts carboxymethyl poria cocos polysaccharide, 0.5-1 parts tetrasodium iminodisuccinate, and 100-200 parts water.

2. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 1, characterized in that, The starch is a mixture of cassava starch and corn starch.

3. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 1, characterized in that, The starch is tapioca starch and corn starch in a mass ratio of 1:0.6-1.

4. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 1, characterized in that, The stabilizer is sodium carboxymethyl cellulose.

5. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 1, characterized in that, The adhesive is made from the following raw materials in parts by weight: 37 parts starch, 4 parts sodium hydroxide, 0.3 parts borax, 0.9 parts stabilizer, 1.5 parts carboxymethyl poria cocos polysaccharide, 0.7 parts tetrasodium iminodisuccinate, and 150 parts water.

6. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 1, characterized in that, Sodium hydroxide is dissolved in a portion of water to make a sodium hydroxide solution. Starch is added, and the mixture is stirred at 60-80℃ for 20-50 minutes. Then, the remaining water, borax, and stabilizer are added in sequence and the mixture is stirred again. After that, carboxymethyl poria cocos polysaccharide and tetrasodium iminodisuccinate are added at a temperature below 60℃ and the mixture is stirred again. After cooling, a biodegradable and environmentally friendly corrugated paper adhesive is obtained.

7. The biodegradable and environmentally friendly corrugated paper adhesive according to claim 6, characterized in that, The mass ratio of water added in the two stages of preparation is 1:4-9.

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