A method for producing polymer nano-stone-based paperboard

Abstract

The invention discloses a method for producing a polymer nano-stone-based paperboard, comprising the following steps: mixing 50-70 parts of calcium carbonate, 3-10 parts of quicklime, 3-5 parts of talc, 3-5 parts of polyethylene, 4-6 parts of polyethylene wax, 1-2 parts of zinc stearate, 0.5-2 parts of a composite coupling agent, 0.5-1 parts of a dispersant, 1.5-2 parts of sodium thiosulfate, 1-1.5 parts of antimony trioxide, 0.5-1 parts of ammonium phosphate, and 10-15 parts of a magnesium hydroxide emulsion suspension, modifying the mixture, plasticizing the mixture, and casting the mixture into paper for producing paperboard; and adjusting the mixture. The outer layer paper, corrugated paper and cushion paper used for producing paper are produced in the proportion of polyethylene, polyethylene wax, calcium carbonate and quicklime and are then put into use. The outer layer paper, corrugated paper and cushion paper are input to the front end of the board machine for sealing, preheating and softening, and then formed by the board machine and finally transported or automatically cut into suitable shapes by external transmission equipment and cutting equipment, which effectively solves the problems of complicated production process and high material cost caused by the existing method of hot melting or gluing auxiliary materials for the production of nano-scale stone-based board.

Description

Technical Field

[0001] The invention relates to the field of polymer nano-stone-based paper production, in particular to a polymer nano-stone-based paperboard production method. Background Art

[0002] Polymer nano-stone-based paper, commonly known as stone paper, is a kind of paper formed by mixing polymer materials with calcium carbonate materials produced by stone crushing. Compared with modern paper, stone-based paper has the advantages of being waterproof, moisture-proof, oil-resistant, tear-resistant, good flatness, and good surface smoothness. The biggest advantage is that the production process of stone paper saves energy and almost no industrial wastewater is generated. It is gradually becoming popular. When the existing nano-level stone-based paperboard is produced, either the auxiliary material is hot-melt bonded to the joint of the paperboard, or the industrial glue is used to produce paperboard made of stone-based paper. Therefore, the process of applying auxiliary materials will be increased, resulting in cumbersome production processes and high material use costs. In view of the above problems, a polymer nano-stone-based paperboard production method is proposed. Summary of the invention

[0003] The object of the present invention is to provide a method for producing a polymer nano-stone-based paperboard to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for producing polymer nano-stone-based paperboard, comprising the following method:

[0005] The first step is to clean, dry, crush and grind the stone raw materials to produce nano-scale calcium carbonate powder for use;

[0006] The second step is to calcine the cleaned and dried stone and grind it into quicklime powder for later use;

[0007] The third step is to mix 50-70 parts of calcium carbonate, 3-10 parts of quicklime, 3-5 parts of talc, 3-5 parts of polyethylene, 4-6 parts of polyethylene wax, 1-2 parts of zinc stearate, 0.5-2 parts of a composite coupling agent, 0.5-1 parts of a dispersant, 1.5-2 parts of sodium thiosulfate, 1-1.5 parts of antimony trioxide, 0.5-1 parts of ammonium phosphate and 10-15 parts of a magnesium hydroxide emulsion suspension, and then perform casting molding after modification and plasticization to form paper for producing paperboard, and produce outer paper, corrugated paper and cushion paper for producing paper by adjusting the ratio of polyethylene, polyethylene wax, calcium carbonate and quicklime for later use;

[0008] The fourth step is to input the outer paper, corrugated paper and cushion paper into the front end of the cardboard machine for sealing, preheating and softening, and then bend the corrugated paper into the center of the trapezoidal groove through the cardboard forming mechanism of the cardboard machine. The corrugated paper is first hot-melted and bonded to the lower surface of the outer paper. During the hot-melting, the hot-melt roller with a heating function moves up and down evenly. Each time the square hot-melt roller moves up, it can bend the corrugated paper to the feeding direction of the equipment to form a trapezoidal groove structure. With the transmission of the raw materials, the outer paper and the corrugated paper are gradually formed. A cushion paper transmission mechanism with a heating plate at the bottom is bonded below the output end of the formed cardboard. After the cushion paper is heated, it is melted at the contact position with the lower surface of the trapezoidal structure of the corrugated paper, thereby forming a cardboard prototype, which is shaped by a cooling device at the outer end of the forming mechanism to form a cardboard structure;

[0009] The fifth step is to convey or automatically cut the cardboard into suitable shapes through external transmission equipment and cutting equipment.

[0010] Preferably, the raw material composition ratio of the outer paper is: 70% calcium carbonate, 6% quicklime, 2% talcum powder, 5% polyethylene, 4% polyethylene wax, 1% zinc stearate, 2% composite coupling agent, 1% dispersant, 2% sodium thiosulfate, 1.5% antimony trioxide, 0.5% ammonium phosphate and 12% magnesium hydroxide emulsion suspension.

[0011] Preferably, the raw materials of corrugated paper have a ratio of: 55 calcium carbonate, 10 quicklime, 5 talc, 7 polyethylene, 2 polyethylene wax, 1 zinc stearate, 1.5 composite coupling agent, 0.8 dispersant, 1.8 sodium thiosulfate, 1.5 antimony trioxide, 0.5 ammonium phosphate and 10 magnesium hydroxide emulsion suspension.

[0012] Preferably, the raw material composition ratio of the cushion paper is: 60 calcium carbonate, 15 quicklime, 5 talc, 5 polyethylene, 10 polyethylene wax, 2 zinc stearate, 2 composite coupling agent, 1 dispersant, 1 sodium thiosulfate, 1 antimony trioxide, 0.5 ammonium phosphate and 12 magnesium hydroxide emulsion suspension.

[0013] Preferably, the heat-melting temperature of the outer paper and the corrugated paper is between 180°C and 190°C.

[0014] Preferably, the hot melting temperature of the bottom end of the corrugated paper and the cushion paper is between 200°C and 230°C.

[0015] Preferably, the preheating temperature of the outer paper, corrugated paper and cushion paper is uniformly heated to 170°C.

[0016] Preferably, the working chambers of the preheating mechanism and the hot-melt mechanism for the outer paper, corrugated paper and cushion paper are filled with inert gas.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts the method of increasing the specific gravity of corresponding components to respectively produce outer layer paper with improved wear resistance and toughness structure, corrugated paper with high softness and good hot-melt effect, and wear-resistant cushion paper with a high proportion of polyethylene wax, which is hot-melted in steps and protected by inert gas to ensure safe production, effectively solving the problems of complicated production process and high material cost caused by the existing method of hot-melting or gluing auxiliary materials in the production of nano-scale stone-based paperboard. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides a technical solution: a method for producing a polymer nano-stone-based paperboard, comprising the following methods:

[0020] The first step is to clean, dry, crush and grind the stone raw materials to produce nano-scale calcium carbonate powder for use;

[0021] The second step is to calcine the cleaned and dried stone and grind it into quicklime powder for later use;

[0022] The third step is to mix 50-70 parts of calcium carbonate, 3-10 parts of quicklime, 3-5 parts of talc, 3-5 parts of polyethylene, 4-6 parts of polyethylene wax, 1-2 parts of zinc stearate, 0.5-2 parts of a composite coupling agent, 0.5-1 parts of a dispersant, 1.5-2 parts of sodium thiosulfate, 1-1.5 parts of antimony trioxide, 0.5-1 parts of ammonium phosphate and 10-15 parts of a magnesium hydroxide emulsion suspension, and then perform casting molding after modification and plasticization to form paper for producing paperboard, and produce outer paper, corrugated paper and cushion paper for producing paper by adjusting the ratio of polyethylene, polyethylene wax, calcium carbonate and quicklime for later use;

[0023] The fourth step is to input the outer paper, corrugated paper and cushion paper into the front end of the cardboard machine for sealing, preheating and softening, and then bend the corrugated paper into the center of the trapezoidal groove through the cardboard forming mechanism of the cardboard machine. The corrugated paper is first hot-melted and bonded to the lower surface of the outer paper. During the hot-melting, the hot-melt roller with a heating function moves up and down evenly. Each time the square hot-melt roller moves up, it can bend the corrugated paper to the feeding direction of the equipment to form a trapezoidal groove structure. With the transmission of the raw materials, the outer paper and the corrugated paper are gradually formed. A cushion paper transmission mechanism with a heating plate at the bottom is bonded below the output end of the formed cardboard. After the cushion paper is heated, it is melted at the contact position with the lower surface of the trapezoidal structure of the corrugated paper, thereby forming a cardboard prototype, which is shaped by a cooling device at the outer end of the forming mechanism to form a cardboard structure;

[0024] The fifth step is to convey or automatically cut the cardboard into suitable shapes through external transmission equipment and cutting equipment.

[0025] Specifically, the raw material composition ratio of the outer layer paper is: calcium carbonate 70, quicklime 6, talc 2, polyethylene 5, polyethylene wax 4, zinc stearate 1, composite coupling agent 2, dispersant 1, sodium thiosulfate 2, antimony trioxide 1.5, ammonium phosphate 0.5 and magnesium hydroxide emulsion suspension 12. Increasing the calcium carbonate ratio can improve the toughness and plasticity of the outer layer paper.

[0026] Specifically, the raw material composition ratio of corrugated paper is: 55 calcium carbonate, 10 quicklime, 5 talc, 7 polyethylene, 2 polyethylene wax, 1 zinc stearate, 1.5 composite coupling agent, 0.8 dispersant, 1.8 sodium thiosulfate, 1.5 antimony trioxide, 0.5 ammonium phosphate and 10 magnesium hydroxide emulsion suspension. By reducing the proportion of calcium carbonate and increasing the proportion of quicklime and talc, the softness is improved, and the specific gravity of polyethylene is increased. The structural characteristics of polyethylene are utilized to facilitate the melting of the joints.

[0027] Specifically, the raw material composition ratio of the cushioning paper is: 60% calcium carbonate, 15% quicklime, 5% talc, 5% polyethylene, 10% polyethylene wax, 2% zinc stearate, 2% composite coupling agent, 1% dispersant, 1% sodium thiosulfate, 1% antimony trioxide, 0.5% ammonium phosphate and 12% magnesium hydroxide emulsion suspension, to ensure the toughness of the paper, and to improve the wear resistance of the cushioning paper as the part in close contact with the articles inside the carton by increasing the proportion of polyethylene wax 10.

[0028] Specifically, the hot melting temperature of the outer paper and the corrugated paper is between 180°C and 190°C.

[0029] Specifically, the hot melting temperature of the bottom end of the corrugated paper and the cushioning paper is between 200°C and 230°C.

[0030] Specifically, the preheating temperature of the outer paper, corrugated paper and cushion paper is uniformly heated to 170°C.

[0031] Specifically, the working chamber of the preheating mechanism and the hot melt mechanism for the outer paper, corrugated paper and cushion paper is filled with inert gas to prevent the temperature control from being too high at a single point, which may cause the paper to burn or oxidize when encountering oxygen.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing polymer nano-stone-based paperboard, characterized in that The following method: The first step is to clean, dry, crush and grind the stone raw materials to produce nano-scale calcium carbonate powder for use; The second step is to calcine the cleaned and dried stone and grind it into quicklime powder for later use; The third step is to mix and modify calcium carbonate, quicklime, talcum powder, polyethylene, polyethylene wax, zinc stearate, composite coupling agent, dispersant, sodium thiosulfate, antimony trioxide, ammonium phosphate and magnesium hydroxide emulsion suspension, plasticize and cast into paper for producing cardboard, and adjust the proportion of polyethylene, polyethylene wax, calcium carbonate and quicklime to produce outer paper, corrugated paper and cushion paper for paper production and set aside; The raw material composition ratio of the outer paper is: calcium carbonate 70, quicklime 6, talc 2, polyethylene 5, polyethylene wax 4, zinc stearate 1, composite coupling agent 2, dispersant 1, sodium thiosulfate 2, antimony trioxide 1.5, ammonium phosphate 0.5 and magnesium hydroxide emulsion suspension 12; The raw material composition ratio of corrugated paper is: calcium carbonate 55, quicklime 10, talc 5, polyethylene 7, polyethylene wax 2, zinc stearate 1, composite coupling agent 1.5, dispersant 0.8, sodium thiosulfate 1.8, antimony trioxide 1.5, ammonium phosphate 0.5 and magnesium hydroxide emulsion suspension 10; The raw material composition ratio of the cushion paper is: calcium carbonate 60, quicklime 15, talc 5, polyethylene 5, polyethylene wax 10, zinc stearate 2, composite coupling agent 2, dispersant 1, sodium thiosulfate 1, antimony trioxide 1, ammonium phosphate 0.5 and magnesium hydroxide emulsion suspension 12; The fourth step is to input the outer paper, corrugated paper and cushion paper into the front end of the paperboard machine for sealing, preheating and softening. The working chamber of the preheating mechanism and the hot-melt mechanism for the outer paper, corrugated paper and cushion paper is filled with inert gas. The corrugated paper is bent into a trapezoidal groove through the paperboard forming mechanism of the paperboard machine. The central corrugated paper is first hot-melted and bonded to the lower surface of the outer paper. During the hot-melting, the hot-melt roller with a heating function moves up and down evenly. Each time the square hot-melt roller moves up, it can bend the corrugated paper to the feeding direction of the equipment to form a trapezoidal groove structure. With the transmission of the raw materials, the outer paper and the corrugated paper are gradually formed. A cushion paper transmission mechanism with a heating plate at the bottom is bonded below the output end of the formed paperboard. After the cushion paper is heated, it is melted at the contact position with the lower surface of the trapezoidal structure of the corrugated paper to form a paperboard prototype. It is shaped by a cooling device at the outer end of the forming mechanism to form a paperboard structure. During hot melting, the hot melting temperature of the outer paper and the corrugated paper is between 180℃-190℃; During hot melting, the hot melting temperature of the bottom of the corrugated paper and the cushion paper is between 200℃ and 230℃; During preheating, the preheating temperature of the outer paper, corrugated paper and cushion paper is uniformly heated to 170°C; The fifth step is to convey or automatically cut the cardboard into suitable shapes through external transmission equipment and cutting equipment.