阅读说明：本技术 一种低成本无烟阻燃瓦楞原纸的制备方法 (Preparation method of low-cost smokeless flame-retardant corrugated base paper ) 是由 徐金发 于 2020-11-05 设计创作，主要内容包括：本发明公开了一种低成本无烟阻燃瓦楞原纸的制备方法,首先制备玉米淀粉溶液,然后加入过硫酸铵,使玉米淀粉溶液稠化,然后再加入阻燃凝胶并加入硫酸铝溶液,最后将浆液在平板上均匀铺开,采用挤压机进行挤压,并在75-85℃进行烘干,含水率在8-10%时,即得瓦楞原纸。该瓦楞原纸中将常规的碳酸钙成分替换为阻燃凝胶成分,该阻燃凝胶成分的主要原料为耐火材料回收料细粉,该耐火材料回收料细粉的主要成分本身就具有非常好的阻燃效果,其在玉米淀粉形成的网络化结构中,可以有效的分散均匀,形成胶膜,从而可以更好的达到阻燃抑烟效果。(The invention discloses a preparation method of a low-cost smokeless flame-retardant corrugated base paper, which comprises the steps of firstly preparing a corn starch solution, then adding ammonium persulfate to thicken the corn starch solution, then adding a flame-retardant gel and adding an aluminum sulfate solution, finally uniformly spreading the slurry on a flat plate, extruding by using an extruder, and drying at 75-85 ℃ until the water content is 8-10%, thus obtaining the corrugated base paper. The corrugated base paper has the advantages that the conventional calcium carbonate component is replaced by the flame-retardant gel component, the main raw material of the flame-retardant gel component is the refractory recycled material fine powder, the main component of the refractory recycled material fine powder has a very good flame-retardant effect, and the flame-retardant gel component can be effectively and uniformly dispersed in a network structure formed by corn starch to form a glue film, so that the flame-retardant and smoke-suppression effects can be better achieved.)

1. A preparation method of low-cost smokeless flame-retardant corrugated base paper is characterized by comprising the following steps:

step one, pulping: adding water into the reaction kettle, heating and stirring, adding corn starch, and uniformly mixing to obtain a corn starch solution; the mass ratio of the corn starch to the water is 1: (5-10);

step two, thickening: adding ammonium persulfate into the corn starch solution under stirring, mixing uniformly, thickening the corn starch solution, heating to 95-100 ℃, and keeping the temperature for 5-15 min;

step three, flame retardant treatment: slowly adding the flame-retardant gel into the corn starch solution, and uniformly mixing; dissolving aluminum sulfate to prepare an aluminum sulfate solution, stirring the aluminum sulfate solution, adding the aluminum sulfate solution into the thickened corn starch solution, adding water, stirring, uniformly mixing, keeping the temperature at 105 ℃ and 120 ℃, and preserving the heat for 20-30 min;

step four, drying: and uniformly spreading the pulp on a flat plate, extruding by using an extruder, and drying at 75-85 ℃ until the water content is 8-10%, thereby obtaining the corrugated base paper.

2. The method for preparing a low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 1, wherein in step three, the method for preparing the flame-retardant gel comprises the following steps:

A. repeatedly crushing the reclaimed refractory material, sieving the crushed reclaimed refractory material with a 800-mesh sieve, and taking undersize products to obtain fine powder of the reclaimed refractory material;

B. mixing the fine powder of the refractory reclaimed materials with fatty alcohol-polyoxyethylene ether sodium sulfate, superfine polyvinyl alcohol powder and water, and uniformly stirring to obtain a paste foaming agent;

C. and (3) mixing the pasty foaming agent with dimethyl silicone oil and water, and stirring at the high speed of 3500rpm of 2500-.

3. The method for preparing the low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 2, wherein the refractory recycled material mainly comprises the following components: corundum, pure calcium aluminate cement, clay, alumina and magnesia.

4. The method for preparing the low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 2, wherein in the step B, the weight ratio of the raw materials is as follows: 35-50 parts of refractory reclaimed material fine powder, 3-8 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.2-0.5 part of superfine polyvinyl alcohol powder and 40-60 parts of water.

5. The method for preparing a low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 2, wherein in the step C, the flame-retardant gel is composed of the following components in percentage by weight: 45-55% of pasty foaming agent, 0.4-0.7% of dimethyl silicone oil and the balance of water.

6. The method for preparing a low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 1, wherein in step three, the flame-retardant gel is added in an amount of 15-22% of the corn starch solution.

7. The method for preparing the low-cost smokeless flame-retardant corrugated medium paper as claimed in claim 1, wherein in step three, the mass fraction of aluminum sulfate in the aluminum sulfate solution is 10-15%.

Technical Field

The invention relates to the technical field of corrugated paper, in particular to a preparation method of low-cost smokeless flame-retardant corrugated base paper.

Background

The corrugated board is light in weight, cheap in price, wide in application, simple in manufacture, and capable of being recycled and even reused at the beginning of 18 th century and 19 th century, so that the application of the corrugated board is remarkably increased. By the beginning of the 20 th century, the packaging has been widely popularized, popularized and applied for various commodities. Packaging containers made using corrugated paperboard have enjoyed great success in competing with a variety of packaging materials, due to their unique properties and advantages for the beautification and protection of the contents. Becoming one of the main materials for manufacturing packaging containers which have not been used for a long time and have been developed rapidly so far.

The corrugated paper board is made up by using face paper, liner paper, core paper and corrugated paper which are made into corrugated form through the processes of adhesion. According to the requirement of commodity package, the corrugated board can be processed into single-sided corrugated boards, three-layer corrugated boards, five-layer corrugated boards, seven-layer corrugated boards, eleven-layer corrugated boards and the like. Single-sided corrugated cardboard is commonly used as a protective liner for packaging goods or to make portable card grids and dunnage to protect goods from shock or impact during transportation for storage, and three-ply and five-ply corrugated cardboard is commonly used in corrugated boxes. The package of many commodities is simple and exquisite by three-layer or five-layer corrugated paper board, and beautiful colorful figures and pictures are printed on the surface of the corrugated paper box or the corrugated paper box, thus not only protecting the internal commodities, but also publicizing and beautifying the internal commodities. A plurality of corrugated cases made of three-layer or five-layer corrugated boards or corrugated cases are directly sold on a sales counter to form a sales package. The seven-layer or eleven-layer corrugated board is mainly used for manufacturing packing cases for electromechanics, flue-cured tobaccos, furniture, motorcycles, large-scale household appliances and the like. In specific commodities, the corrugated board can be combined to form an inner sleeve box and an outer sleeve box, so that the corrugated board is convenient to manufacture and is convenient for containing, storing and transporting commodities. With the environmental protection requirement and the requirement of the national relevant policy, the commodity package made of the corrugated board has the trend of gradually replacing the wooden box package.

The main component of the corrugated board is plant cellulose, the structure of macromolecular chains is formed by glucosyl rings, the polymerization degree of the fibers is reduced when the fibers are heated, the fibers are dehydrated and oxidized along with the temperature rise, and the oxygen index of the common paperboard at normal temperature is only 15%. The surface of the traditional flame-retardant corrugated base paper is coated with the halogen flame retardant, so that the traditional flame-retardant corrugated base paper has poor flame-retardant effect and can generate a large amount of toxic smoke. Some patents also disclose that materials such as magnesium aluminum hydrotalcite, aluminum hydroxide and the like or molecular sieves are added into corrugated base paper to be used as smoke suppressants of a flame retardant system, but the corrugated base paper has high cost and high market value, and the application of the flame retardant corrugated base paper is limited. The invention researches a preparation method of low-cost smokeless flame-retardant corrugated base paper according to the current market demand.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a preparation method of low-cost smokeless flame-retardant corrugated base paper.

The technical scheme of the invention is as follows:

a preparation method of low-cost smokeless flame-retardant corrugated base paper comprises the following steps:

step one, pulping: adding water into the reaction kettle, heating and stirring, adding corn starch, and uniformly mixing to obtain a corn starch solution; the mass ratio of the corn starch to the water is 1: (5-10);

step two, thickening: adding ammonium persulfate into the corn starch solution under stirring, mixing uniformly, thickening the corn starch solution, heating to 95-100 ℃, and keeping the temperature for 5-15 min;

step three, flame retardant treatment: slowly adding the flame-retardant gel into the corn starch solution, and uniformly mixing; dissolving aluminum sulfate to prepare an aluminum sulfate solution, stirring the aluminum sulfate solution, adding the aluminum sulfate solution into the thickened corn starch solution, adding water, stirring, uniformly mixing, keeping the temperature at 105 ℃ and 120 ℃, and preserving the heat for 20-30 min;

step four, drying: and uniformly spreading the pulp on a flat plate, extruding by using an extruder, and drying at 75-85 ℃ until the water content is 8-10%, thereby obtaining the corrugated base paper.

Preferably, in the third step, the preparation method of the flame retardant gel comprises the following steps:

A. repeatedly crushing the reclaimed refractory material, sieving the crushed reclaimed refractory material with a 800-mesh sieve, and taking undersize products to obtain fine powder of the reclaimed refractory material;

B. mixing the fine powder of the refractory reclaimed materials with fatty alcohol-polyoxyethylene ether sodium sulfate, superfine polyvinyl alcohol powder and water, and uniformly stirring to obtain a paste foaming agent;

C. and (3) mixing the pasty foaming agent with dimethyl silicone oil and water, and stirring at the high speed of 3500rpm of 2500-.

Preferably, the refractory recycled material mainly comprises the following components: corundum, pure calcium aluminate cement, clay, alumina and magnesia.

Preferably, in the step B, the weight ratio of each raw material is: 35-50 parts of refractory reclaimed material fine powder, 3-8 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.2-0.5 part of superfine polyvinyl alcohol powder and 40-60 parts of water.

Preferably, in the step C, the flame retardant gel comprises the following components in percentage by weight: 45-55% of pasty foaming agent, 0.4-0.7% of dimethyl silicone oil and the balance of water.

Preferably, in the third step, the addition amount of the flame-retardant gel is 15-22% of the corn starch solution.

Preferably, in the third step, the mass fraction of aluminum sulfate in the aluminum sulfate solution is 10-15%.

The invention has the advantages that: in the corrugated paper preparation process, firstly, a corn starch solution is prepared, then ammonium persulfate is added to thicken the corn starch solution, then flame-retardant gel and an aluminum sulfate solution are added, finally, the slurry is uniformly spread on a flat plate, an extruder is adopted to extrude the slurry, the slurry is dried at the temperature of 75-85 ℃, and when the water content is 8-10%, the corrugated base paper is obtained. The corrugated base paper has the advantages that the conventional calcium carbonate component is replaced by the flame-retardant gel component, the main raw material of the flame-retardant gel component is the refractory recycled material fine powder, the main component of the refractory recycled material fine powder has a very good flame-retardant effect, and the flame-retardant gel component can be effectively and uniformly dispersed in a network structure formed by corn starch to form a glue film, so that the flame-retardant and smoke-suppression effects can be better achieved.

Detailed Description

Example 1:

a preparation method of low-cost smokeless flame-retardant corrugated base paper comprises the following steps:

step one, pulping: adding water into the reaction kettle, heating and stirring, adding corn starch, and uniformly mixing to obtain a corn starch solution; the mass ratio of the corn starch to the water is 1: 8;

step two, thickening: adding ammonium persulfate into the corn starch solution under stirring, uniformly mixing, thickening the corn starch solution, heating to 98 ℃, and keeping the temperature for 12 min;

step three, flame retardant treatment: slowly adding the flame-retardant gel into the corn starch solution, and uniformly mixing; dissolving aluminum sulfate to obtain an aluminum sulfate solution, stirring the aluminum sulfate solution, adding water into the thickened corn starch solution, stirring, uniformly mixing, keeping the temperature at 108 ℃, and keeping the temperature for 25 min;

step four, drying: and uniformly spreading the pulp on a flat plate, extruding by using an extruder, and drying at 80 ℃ until the water content is 8.5%, thereby obtaining the corrugated base paper.

In the third step, the preparation method of the flame-retardant gel comprises the following steps:

A. repeatedly crushing the reclaimed refractory material, sieving the crushed reclaimed refractory material with a 800-mesh sieve, and taking undersize products to obtain fine powder of the reclaimed refractory material;

B. mixing the fine powder of the refractory reclaimed materials with fatty alcohol-polyoxyethylene ether sodium sulfate, superfine polyvinyl alcohol powder and water, and uniformly stirring to obtain a paste foaming agent;

C. and (3) mixing the pasty foaming agent with the simethicone and water, and stirring at a high speed of 3200rpm for 15min to obtain the flame-retardant gel.

The refractory reclaimed material mainly comprises the following components: corundum, pure calcium aluminate cement, clay, alumina and magnesia.

In the step B, the weight ratio of the raw materials is as follows: 42 parts of refractory reclaimed material fine powder, 5 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.35 part of superfine polyvinyl alcohol powder and 50 parts of water.

In the step C, the flame-retardant gel consists of the following components in percentage by weight: 48% of paste foaming agent, 0.5% of dimethyl silicone oil and the balance of water.

In the third step, the addition amount of the flame-retardant gel is 18 percent of that of the corn starch solution; in the aluminum sulfate solution, the mass fraction of aluminum sulfate is 13.5%.

Example 2:

a preparation method of low-cost smokeless flame-retardant corrugated base paper comprises the following steps:

step one, pulping: adding water into the reaction kettle, heating and stirring, adding corn starch, and uniformly mixing to obtain a corn starch solution; the mass ratio of the corn starch to the water is 1: 5;

step two, thickening: adding ammonium persulfate into the corn starch solution under stirring, mixing uniformly, thickening the corn starch solution, heating to 100 ℃, and keeping the temperature for 5 min;

step three, flame retardant treatment: slowly adding the flame-retardant gel into the corn starch solution, and uniformly mixing; dissolving aluminum sulfate to obtain an aluminum sulfate solution, stirring and adding the aluminum sulfate solution into the thickened corn starch solution, adding water, stirring, uniformly mixing, keeping the temperature at 120 ℃, and keeping the temperature for 20 min;

step four, drying: and uniformly spreading the pulp on a flat plate, extruding by using an extruder, and drying at 85 ℃ until the water content is 8%, thereby obtaining the corrugated base paper.

In the third step, the preparation method of the flame-retardant gel comprises the following steps:

A. repeatedly crushing the reclaimed refractory material, sieving the crushed reclaimed refractory material with a 800-mesh sieve, and taking undersize products to obtain fine powder of the reclaimed refractory material;

B. mixing the fine powder of the refractory reclaimed materials with fatty alcohol-polyoxyethylene ether sodium sulfate, superfine polyvinyl alcohol powder and water, and uniformly stirring to obtain a paste foaming agent;

C. and (3) mixing the pasty foaming agent with simethicone and water, and stirring at 3500rpm for 10min to obtain the flame-retardant gel.

The refractory reclaimed material mainly comprises the following components: corundum, pure calcium aluminate cement, clay, alumina and magnesia.

In the step B, the weight ratio of the raw materials is as follows: 50 parts of refractory reclaimed material fine powder, 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.5 part of superfine polyvinyl alcohol powder and 60 parts of water.

In the step C, the flame-retardant gel consists of the following components in percentage by weight: 55% of pasty foaming agent, 0.4% of dimethyl silicone oil and the balance of water.

In the third step, the addition amount of the flame-retardant gel is 22 percent of that of the corn starch solution; in the aluminum sulfate solution, the mass fraction of aluminum sulfate is 10%.

Example 3:

a preparation method of low-cost smokeless flame-retardant corrugated base paper comprises the following steps:

step one, pulping: adding water into the reaction kettle, heating and stirring, adding corn starch, and uniformly mixing to obtain a corn starch solution; the mass ratio of the corn starch to the water is 1: 10;

step two, thickening: adding ammonium persulfate into the corn starch solution under stirring, uniformly mixing, thickening the corn starch solution, heating to 95 ℃, and keeping the temperature for 15 min;

step three, flame retardant treatment: slowly adding the flame-retardant gel into the corn starch solution, and uniformly mixing; dissolving aluminum sulfate to obtain an aluminum sulfate solution, stirring and adding the aluminum sulfate solution into the thickened corn starch solution, adding water, stirring, uniformly mixing, keeping the temperature at 105 ℃, and keeping the temperature for 30 min;

step four, drying: and uniformly spreading the pulp on a flat plate, extruding by using an extruder, and drying at 75 ℃ until the water content is 10%, thereby obtaining the corrugated base paper.

In the third step, the preparation method of the flame-retardant gel comprises the following steps:

A. repeatedly crushing the reclaimed refractory material, sieving the crushed reclaimed refractory material with a 800-mesh sieve, and taking undersize products to obtain fine powder of the reclaimed refractory material;

B. mixing the fine powder of the refractory reclaimed materials with fatty alcohol-polyoxyethylene ether sodium sulfate, superfine polyvinyl alcohol powder and water, and uniformly stirring to obtain a paste foaming agent;

C. and (3) mixing the pasty foaming agent with the dimethyl silicone oil and water, and stirring at a high speed of 2500rpm for 20min to obtain the flame-retardant gel.

The refractory reclaimed material mainly comprises the following components: corundum, pure calcium aluminate cement, clay, alumina and magnesia.

In the step B, the weight ratio of the raw materials is as follows: 35 parts of refractory reclaimed material fine powder, 8 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 0.2 part of superfine polyvinyl alcohol powder and 40 parts of water.

In the step C, the flame-retardant gel consists of the following components in percentage by weight: 45% of paste foaming agent, 0.7% of dimethyl silicone oil and the balance of water.

In the third step, the addition amount of the flame-retardant gel is 15 percent of that of the corn starch solution; in the aluminum sulfate solution, the mass fraction of aluminum sulfate is 15%.

Comparative example 1

The flame-retardant gel in example 1 was replaced with the refractory reclaimed material fine powder of the same solid quality, and the remaining preparation conditions were unchanged.

The samples of examples 1 to 3 and comparative example 1 were tested on finished corrugated board and compared with the samples of finished corrugated board on the market, resulting in the following test data (the following are average values of 3 tests):

table 1: comparative test data for samples of examples 1-3 and comparative example 1;

	example 1	Example 2	Example 3	Comparative example 1	Market sample
						Quantitative g/cm2	124	125	124	125	125
Thickness mm	0.25	0.25	0.25	0.25	0.25
						Limiting oxygen index%	33	35	32	29	14
Density of smoke	10	12	9	24	67

The test data show that the corrugated base paper prepared by the invention has very good flame-retardant and smoke-suppression effects.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.