Degradable environment-friendly corrugated paper glue

Abstract

The invention discloses degradable environment-friendly corrugated paper glue and belongs to the technical field of glue. The glue is prepared from the following raw materials in parts by mass: 30 to 51.4 parts of starch, 3 to 7 parts of sodium hydroxide, 0.3 to 0.8 part of borax, 0.5 to 3 parts of a stabilizer, 0.5 to 2 parts of carboxymethyl pachymaran, 0.5 to 1 part of tetrasodium iminodisuccinate and 100 to 200 parts of water. Effective preparation of the degradable, environment-friendly and high-adhesion glue for corrugated board production is realized, and ecological transformation of the packaging industry is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, and more specifically, to a degradable and environmentally friendly corrugated paper adhesive. Background Art

[0002] Corrugated board is the base material for manufacturing various corrugated cartons. Generally, it is a plate-like object formed by bonding (adhering or bonding through an adhesive) box board paper and corrugated medium paper. Currently, traditional adhesives used for bonding various layers of corrugated board contain harmful substances such as formaldehyde, are not easily degradable, and are not environmentally friendly. Although starch-based adhesives are degradable, their bonding performance is not ideal enough to fully meet industrial requirements. If a corrugated paper adhesive that can simultaneously meet the requirements of degradability, environmental friendliness, and bonding performance can be developed, it will have positive significance. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a degradable and environmentally friendly corrugated paper adhesive.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

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

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

[0007] The present invention is further configured such that the mass ratio of tapioca starch to corn starch in the starch is 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 mass: 37 parts of starch, 4 parts of sodium hydroxide, 0.3 parts of borax, 0.9 parts of stabilizer, 1.5 parts of carboxymethyl pachymaran, 0.7 parts of sodium iminodisuccinate, and 150 parts of water.

[0010] The present invention is further configured such that sodium hydroxide is dissolved in a part of water to form a sodium hydroxide solution, starch is added, and after stirring and mixing evenly at 60 - 80 °C for 20 - 50 min, the remaining water, borax, and stabilizer are added in sequence and continue to be mixed evenly. Then, carboxymethyl pachymaran and sodium iminodisuccinate are added below 60 °C and continue to be mixed evenly. After cooling, a degradable and environmentally friendly corrugated paper adhesive is obtained.

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

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

[0013] By compounding corn starch and tapioca starch, and combining components such as sodium hydroxide, borax, and sodium carboxymethyl cellulose, the present invention significantly improves the adhesive strength and biodegradable environmental protection performance of the glue; especially through the addition and modification of carboxymethyl pachymaran and sodium iminodisuccinate, the biodegradability and bonding strength are further enhanced, and the environmental residue risk is reduced. The overall formula is non-toxic and biodegradable, suitable for the production of corrugated cardboard, meeting the requirements of high-strength bonding and green sustainability, and is conducive to promoting the ecological transformation of the packaging industry. Specific embodiments

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] The biodegradable and environmentally friendly corrugated paper glue of the present invention is made from the following raw materials in parts by mass: 30 - 51.4 parts of starch (preferably a mixture of tapioca starch and corn starch, more preferably a mixture with a mass ratio of tapioca starch to corn starch 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 pachymaran, 0.5 - 1 part of sodium iminodisuccinate, and 100 - 200 parts of water.

[0016] Dissolve sodium hydroxide in part of the water to make a sodium hydroxide solution, add starch, stir and mix evenly at 60 - 80°C for 20 - 50 minutes, then add the remaining water (the mass ratio of water added twice is 1:4 - 9), borax, and stabilizer in sequence and continue to mix evenly. After that, add carboxymethyl pachymaran and sodium iminodisuccinate at a temperature below 60°C and continue to mix evenly. After cooling, a biodegradable and environmentally friendly corrugated paper glue 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, stir and mix evenly 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 in sequence and continue to mix evenly. After that, add 1.5 parts by weight of carboxymethyl pachymaran and 0.7 parts by weight of sodium iminodisuccinate at 50°C and continue to mix evenly. After cooling, a biodegradable and environmentally friendly corrugated paper glue is obtained.

[0019] Comparative Example 1

[0020] The glue was prepared according to Example 1, except that carboxymethyl pachymaran was not added.

[0021] Comparative Example 2

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

[0023] Comparative Example 3

[0024] The glue was prepared according to Example 1, except that carboxymethyl pachymaran and tetrasodium iminodisuccinate were not added.

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

[0026] Table 1

[0027]

[0028] Comparative Example 4

[0029] The glue was prepared according to Example 1, except that carboxymethyl cellulose sodium was used to replace carboxymethyl pachymaran in equal mass.

[0030] Comparative Example 5

[0031] The glue was prepared according to Example 1, except that disodium ethylenediaminetetraacetate was used to replace tetrasodium iminodisuccinate in equal mass.

[0032] It was found through testing that the complete curing times of the glues in Comparative Example 4 and Comparative Example 5 were 322 s and 309 s respectively.

[0033] The above - mentioned are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above - mentioned embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as belonging to the protection scope of the present invention.

Claims

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

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

3. The degradable and environment-friendly corrugated paper glue according to claim 1, characterized in that, The mass ratio of tapioca starch to corn starch in the starch is 1:0.6 - 1.

4. The degradable and environment-friendly corrugated paper glue according to claim 1, characterized in that, The stabilizer is sodium carboxymethyl cellulose.

5. The degradable and environment-friendly corrugated paper glue according to claim 1, characterized in that, The glue is made from the following raw materials in parts by mass: 37 parts of starch, 4 parts of sodium hydroxide, 0.3 parts of borax, 0.9 parts of stabilizer, 1.5 parts of carboxymethyl pachyman polysaccharide, 0.7 parts of tetrasodium iminodisuccinate, and 150 parts of water.

6. The degradable and environment-friendly corrugated paper glue according to claim 1, characterized in that, Dissolve sodium hydroxide in part of the water to make a sodium hydroxide solution, add starch, stir and mix evenly at 60 - 80 °C for 20 - 50 min, then successively add the remaining water, borax, and stabilizer and continue to mix evenly. After that, add carboxymethyl pachyman polysaccharide and tetrasodium iminodisuccinate below 60 °C and continue to mix evenly. After cooling, a degradable and environmentally friendly corrugated paper glue is obtained.

7. The biodegradable and environment-friendly corrugated paper glue according to claim 6, characterized in that, The mass ratio of the water added twice during preparation is 1:4 - 9.

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