阅读说明：本技术 一种环保型疏水性强化纸的加工方法 (Processing method of environment-friendly hydrophobic reinforced paper ) 是由 章华 于 2020-06-29 设计创作，主要内容包括：本发明涉及一种环保型疏水性强化纸的加工方法,包括如下步骤：S1、3-4色水性油墨印刷；S2、双面PU涂层；S3、复卷分卷；S4、烘房干燥48-72h；S5、冷压平贴包覆到基板上；其中,S2中,所述PU涂层的原料包括胺基树脂、罩光树脂、季戊四醇、水性硅油、乙醇、改性防水助剂A、改性防水助剂B。本发明将油性油墨印刷改成水性油墨印刷,满足环保的要求；采用双面PU涂层,实现了原烘干所需烘箱从14米减少至6米,有效降低了能耗；另外得到的强化纸无需三聚氰胺浸渍,不含甲醛,适合异性材料包覆,冷压,平贴,应用于定制家具、工业装修等基材饰面所需。(The invention relates to a processing method of environment-friendly hydrophobic reinforced paper, which comprises the following steps: s1, printing 3-4 colors of aqueous ink; s2, double-sided PU coating; s3, rewinding and splitting; s4, drying for 48-72h in a drying room; s5, cold pressing, flatly pasting and coating the substrate; in S2, the PU coating comprises amino resin, finishing resin, pentaerythritol, water-based silicone oil, ethanol, a modified waterproof auxiliary agent A and a modified waterproof auxiliary agent B. The invention changes the printing of oil ink into the printing of water ink, thereby meeting the requirement of environmental protection; the double-sided PU coating is adopted, so that the oven required by the original drying is reduced from 14 meters to 6 meters, and the energy consumption is effectively reduced; in addition, the obtained reinforced paper does not need to be impregnated by melamine, does not contain formaldehyde, is suitable for coating, cold pressing and flat pasting of foreign materials, and is applied to the requirements of base material decorative surfaces of customized furniture, industrial decoration and the like.)

1. The processing method of the environment-friendly hydrophobic reinforced paper is characterized by comprising the following steps:

s1, printing 3-4 colors of aqueous ink;

s2, double-sided PU coating;

s3, rewinding and splitting;

s4, drying for 48-72h in a drying room;

s5, cold pressing, flatly pasting and coating the substrate;

in S2, the PU coating comprises the following raw materials in parts by weight: 20-24 parts of amino resin, 30-40 parts of finishing resin, 4-6 parts of pentaerythritol, 5-12 parts of water-based silicone oil, 40-80 parts of ethanol, 15-25 parts of modified waterproof auxiliary agent A and 78-40 parts of modified waterproof auxiliary agent B30.

2. The processing method of the environment-friendly hydrophobic reinforced paper as claimed in claim 1, wherein the modified waterproof assistant A comprises the following raw materials in parts by weight: 20-30 parts of lignin-based polyurethane, 15-25 parts of vitrified powder, 4-8 parts of hydrochloric acid solution with the mass percentage of 4-6%, 3-5 parts of cellulose acetate butyrate, 2-6 parts of wood fiber powder, 1-5601-5 parts of silane coupling agent, 4-8 parts of ethanol, 3-9 parts of nano calcium carbonate, 2-5 parts of polyvinylidene fluoride, 1-5 parts of carbamate, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate.

3. The processing method of the environment-friendly hydrophobic reinforced paper as claimed in claim 1, wherein the modified waterproof assistant A is prepared by the following process: putting lignin-based polyurethane and vitrified powder into a calcining furnace, calcining for 2-5h at the temperature of 820-; uniformly mixing nano calcium carbonate, polyvinylidene fluoride and carbamate, heating to 480 ℃ of 320-.

4. The processing method of the environment-friendly hydrophobic reinforced paper as claimed in claim 1, wherein the modified waterproof assistant B comprises the following raw materials in parts by weight: 20-30 parts of N-methylethanolamine, 15-25 parts of polyethylene glycol, 4-8 parts of hydrochloric acid solution with the mass percentage of 4-6%, 3-5 parts of cellulose acetate butyrate, 2-6 parts of wood fiber powder, 1-5601-5 parts of silane coupling agent, 4-8 parts of ethanol, 3-9 parts of nano calcium carbonate, 2-5 parts of phenyl ortho-hydroxybenzoate, 1-5 parts of polyamide, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate.

5. The processing method of the environment-friendly hydrophobic reinforced paper as claimed in claim 1, wherein the modified waterproof assistant B is prepared by the following process: putting N-methylethanolamine and polyethylene glycol into a calcining furnace, calcining for 2-5h at the temperature of 820-5 ℃, cooling, soaking in a hydrochloric acid solution with the mass percent of 4-6% for 1-3h, filtering, taking out, washing with clear water, drying, crushing, adding cellulose acetate butyrate, wood fiber powder, a silane coupling agent KH-560 and ethanol, uniformly mixing, stirring at the rotating speed of 650-850r/min for 20-40min, then heating to 70-90 ℃, preserving heat for 3-5h, filtering, drying in the air, drying at the temperature of 60-80 ℃ for 20-28h, and cooling to room temperature to obtain a material a; uniformly mixing nano calcium carbonate, phenyl ortho-hydroxybenzoate and polyamide, heating to 480 ℃ of 320-.

6. The processing method of environment-friendly hydrophobic reinforced paper as claimed in claim 1, wherein in S2, the double-sided PU coating is applied by immersion feeding for 20-30 min.

Technical Field

The invention relates to the technical field of reinforced paper processing technology, in particular to a processing method of environment-friendly hydrophobic reinforced paper.

Background

At present, most of the reinforced paper on the market is produced by adopting an oil-based ink printing mode, the oil-based ink production mode does not meet the requirement of environmental protection, and in addition, most of the reinforced paper on the market still does not meet the requirement of water resistance after double-layer PU coating, so that the development of a processing method of environment-friendly hydrophobic reinforced paper is urgently needed to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a processing method of environment-friendly hydrophobic reinforced paper, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a processing method of environment-friendly hydrophobic reinforced paper comprises the following steps:

s1, printing 3-4 colors of aqueous ink;

s2, double-sided PU coating;

s3, rewinding and splitting;

s4, drying for 48-72h in a drying room;

s5, cold pressing, flatly pasting and coating the substrate;

in S2, the PU coating comprises the following raw materials in parts by weight: 20-24 parts of amino resin, 30-40 parts of finishing resin, 4-6 parts of pentaerythritol, 5-12 parts of water-based silicone oil, 40-80 parts of ethanol, 15-25 parts of modified waterproof auxiliary agent A and 30-40 parts of modified waterproof auxiliary agent B.

Preferably, the modified waterproof auxiliary agent A comprises the following raw materials in parts by weight: 20-30 parts of lignin-based polyurethane, 15-25 parts of vitrified powder, 4-8 parts of hydrochloric acid solution with the mass percentage of 4-6%, 3-5 parts of cellulose acetate butyrate, 2-6 parts of wood fiber powder, 1-5601-5 parts of silane coupling agent, 4-8 parts of ethanol, 3-9 parts of nano calcium carbonate, 2-5 parts of polyvinylidene fluoride, 1-5 parts of carbamate, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate.

Preferably, the modified waterproof auxiliary agent A is prepared by the following process: putting lignin-based polyurethane and vitrified powder into a calcining furnace, calcining for 2-5h at the temperature of 820-; uniformly mixing nano calcium carbonate, polyvinylidene fluoride and carbamate, heating to 480 ℃ of 320-.

Preferably, the modified waterproof auxiliary agent B comprises the following raw materials in parts by weight: 20-30 parts of N-methylethanolamine, 15-25 parts of polyethylene glycol, 4-8 parts of hydrochloric acid solution with the mass percentage of 4-6%, 3-5 parts of cellulose acetate butyrate, 2-6 parts of wood fiber powder, 1-5601-5 parts of silane coupling agent, 4-8 parts of ethanol, 3-9 parts of nano calcium carbonate, 2-5 parts of phenyl ortho-hydroxybenzoate, 1-5 parts of polyamide, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate.

Preferably, the modified waterproof auxiliary agent B is prepared by the following process: putting N-methylethanolamine and polyethylene glycol into a calcining furnace, calcining for 2-5h at the temperature of 820-5 ℃, cooling, soaking in a hydrochloric acid solution with the mass percent of 4-6% for 1-3h, filtering, taking out, washing with clear water, drying, crushing, adding cellulose acetate butyrate, wood fiber powder, a silane coupling agent KH-560 and ethanol, uniformly mixing, stirring at the rotating speed of 650-850r/min for 20-40min, then heating to 70-90 ℃, preserving heat for 3-5h, filtering, drying in the air, drying at the temperature of 60-80 ℃ for 20-28h, and cooling to room temperature to obtain a material a; uniformly mixing nano calcium carbonate, phenyl ortho-hydroxybenzoate and polyamide, heating to 480 ℃ of 320-.

Preferably, in S2, the double-sided PU coating adopts a submerged feeding mode, and the immersion time is 20-30 min.

Compared with the prior art, the invention has the beneficial effects that:

1. the 3-4 color printing of the invention changes the oil ink printing into the water-based ink printing, which meets the requirement of environmental protection, because the water-based ink uses water as a dissolving carrier, the water-based ink has the obvious characteristics of environmental protection and safety: the printing ink is safe, non-toxic, harmless, non-inflammable, non-explosive and almost free of volatile organic gases, and organic solvents such as ethanol, isopropanol, butanol, propanol, butanone, ethyl acetate, butyl acetate, toluene, xylene and the like are commonly used in the printing ink used for oil-based ink printing. Although most of these organic solvents are eliminated after drying, the residual part is still harmful to human body. Especially, the residual solvent of the printed matter with larger inking area and thicker ink layer is more, and the toxic substances released in the using process pollute the air and harm the health of people.

2. By adopting the double-sided PU coating, the oven required by the original drying is reduced from 14 meters to 6 meters, and the energy consumption is effectively reduced.

3. The obtained reinforced paper does not need to be impregnated by melamine, does not contain formaldehyde, is suitable for coating, cold pressing and flat pasting of foreign materials, and is applied to the requirements of base material decorative surfaces of customized furniture, industrial decoration and the like.

4. In the double-sided PU coating, the adopted modified waterproof auxiliary agent A is prepared by calcining lignin-based polyurethane and ceramic powder, cooling, soaking in hydrochloric acid solution, filtering, taking out, cleaning with clear water, drying, crushing, adding cellulose acetate butyrate, wood fiber powder, silane coupling agent KH-560 and ethanol, uniformly mixing, stirring, heating, keeping the temperature, performing suction filtration, drying, and cooling to room temperature to obtain a material A; the method comprises the steps of uniformly mixing nano calcium carbonate, polyvinylidene fluoride and carbamate, heating, preserving heat, cooling to normal temperature, adding a material A, dimethylethanolamine and tristearin, uniformly mixing, heating, preserving heat, stirring and cooling to the room temperature to obtain the modified waterproof paper, wherein lignin-based polyurethane and vitrified powder are used as fillers, hydroxyl on the surfaces of the lignin-based polyurethane and vitrified powder is utilized, cellulose acetate butyrate and wood fiber powder are added in an auxiliary mode to serve as toughening materials of a modified waterproof auxiliary agent A, unsaturated bonds on the surfaces of the nano calcium carbonate, polyvinylidene fluoride, carbamate, dimethylethanolamine and tristearin are utilized, and the combination with the fillers and the toughening materials is realized under the action of a silane coupling agent KH-560, so that the obtained reinforced paper has excellent waterproof performance.

5. In the double-sided PU coating, the adopted modified waterproof auxiliary agent B is calcined by N-methylethanolamine and polyethylene glycol, then cooled, soaked in hydrochloric acid solution, filtered and taken out, washed by clear water and dried, crushed, then added with cellulose acetate butyrate, wood fiber powder, silane coupling agent KH-560 and ethanol, uniformly mixed, stirred, heated, kept warm, filtered, dried and cooled to room temperature to obtain a material a; the reinforced paper is prepared by uniformly mixing nano calcium carbonate, phenyl ortho-hydroxybenzoate and polyamide, heating, preserving heat, cooling to normal temperature, then adding a material a, dimethylethanolamine and tristearin, uniformly mixing, heating, preserving heat, stirring and cooling to room temperature, wherein N-methylethanolamine and polyethylene glycol are used as fillers, hydroxyl on the surfaces of N-methylethanolamine and polyethylene glycol are used, cellulose acetate butyrate and wood fiber powder are added in an auxiliary manner to serve as toughening materials of a modified waterproof auxiliary agent B, unsaturated bonds on the surfaces of nano calcium carbonate, phenyl ortho-hydroxybenzoate, polyamide, dimethylethanolamine and tristearin are used for realizing the combination with the fillers and the toughening materials under the action of a silane coupling agent KH-560, and the obtained reinforced paper has excellent waterproof performance.

6. The proportion of the modified waterproof auxiliary agent A and the modified waterproof auxiliary agent B in the raw materials of the PU coating is controlled, the modified waterproof auxiliary agent A and the modified waterproof auxiliary agent B are enabled to act on the amino resin cooperatively, and the hydroxyl groups on the modified waterproof auxiliary agent A and the modified waterproof auxiliary agent B are combined with unsaturated bonds on the surface of the amino resin, so that the hydrophobic modification of the amino resin is effectively realized, and the reinforced paper coated with the double-layer PU coating has excellent hydrophobic property and waterproof property.

Detailed Description

In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.

In an embodiment, a method for processing environment-friendly hydrophobic reinforced paper comprises the following steps:

s1, printing 3-4 colors of aqueous ink;

s2, double-sided PU coating, wherein the double-sided PU coating adopts an immersion type feeding mode, and the immersion time is 20-30 min;

s3, rewinding and splitting;

s4, drying for 48-72h in a drying room;

s5, cold pressing, flatly pasting and coating the substrate;

in S2, the PU coating comprises the following raw materials in parts by weight: 20-24 parts of amino resin, 30-40 parts of finishing resin, 4-6 parts of pentaerythritol, 5-12 parts of water-based silicone oil, 40-80 parts of ethanol, 15-25 parts of modified waterproof auxiliary agent A and 30-40 parts of modified waterproof auxiliary agent B.

The modified waterproof auxiliary agent A is prepared by the following process: putting 20-30 parts by weight of lignin-based polyurethane and 15-25 parts by weight of vitrified powder into a calcining furnace, calcining for 2-5h at the temperature of 820-6 ℃, cooling, soaking in 4-8 parts by weight of 4-6% hydrochloric acid solution, filtering, taking out, washing with clear water, drying, crushing, adding 3-5 parts by weight of cellulose acetate butyrate, 2-6 parts by weight of wood fiber powder, 1-5 parts by weight of silane coupling agent KH-560 and 4-8 parts by weight of ethanol, uniformly mixing, stirring at the rotating speed of 650-850r/min for 20-40min, heating to 70-90 ℃, preserving heat for 3-5h, filtering, drying at the temperature of 60-80 ℃ for 20-28h, and cooling to room temperature to obtain a material A; uniformly mixing 3-9 parts of nano calcium carbonate, 2-5 parts of polyvinylidene fluoride and 1-5 parts of carbamate, heating to 320-480 ℃, preserving heat for 12-18min, cooling to normal temperature, then adding the material A, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate, uniformly mixing, heating to 75-85 ℃, preserving heat for 1.5-3.5h, stirring for 1.5-3.5h, and cooling to room temperature to obtain the modified waterproof auxiliary A.

The modified waterproof auxiliary agent B is prepared by the following process: putting 20-30 parts by weight of N-methylethanolamine and 15-25 parts by weight of polyethylene glycol into a calcining furnace, calcining for 2-5h at the temperature of 820-6 ℃, cooling, soaking in 4-8 parts by weight of 4-6% hydrochloric acid solution, filtering, taking out, washing with clear water, drying, crushing, adding 3-5 parts by weight of cellulose acetate butyrate, 2-6 parts by weight of wood fiber powder, 1-5 parts by weight of silane coupling agent KH-560 and 4-8 parts by weight of ethanol, uniformly mixing, stirring at the rotating speed of 650-850r/min for 20-40min, heating to 70-90 ℃, preserving heat for 3-5h, filtering, drying in the air, drying at the temperature of 60-80 ℃ for 20-28h, and cooling to room temperature to obtain a material a; uniformly mixing 3-9 parts of nano calcium carbonate, 2-5 parts of phenyl ortho-hydroxybenzoate and 1-5 parts of polyamide, heating to 480 ℃, preserving heat for 12-18min, cooling to normal temperature, then adding the material a, 3-6 parts of dimethylethanolamine and 4-8 parts of glyceryl tristearate, uniformly mixing, heating to 75-85 ℃, preserving heat for 1.5-3.5h, stirring for 1.5-3.5h, and cooling to room temperature to obtain the modified waterproof auxiliary B.