CN106497022B - A preparation method of special synthetic paper with the function of adsorbing benzene - Google Patents

Abstract

The invention discloses a preparation method of special synthetic paper with the function of absorbing benzene. The present invention mainly comprises: stirring the polyurethane particles and the solvent in the reactor, and then standing still, so that the polyurethane particles are completely dissolved in the solvent to obtain a polyurethane solution; adding n-butyl titanate to the obtained polyurethane solution, stirring, and mixing uniformly, Obtain a mixed solution; add molecular sieve powder to the obtained mixed solution, stir to obtain a solid-liquid mixture, and let it stand to defoam; apply the obtained solid-liquid mixture on a release paper, and then immerse it together in an aqueous solution of glacial acetic acid, and wait for the solid-liquid mixture to After the film is fully cured, it is taken out and placed in an electric blast drying oven to dry; the film and the release paper are peeled off to obtain a special synthetic paper product with the function of absorbing benzene. The molecular sieve powder inside the special synthetic paper of the invention and the porous structure of the special synthetic paper greatly improve the adsorption performance of the special synthetic paper to benzene in the indoor air.

Description

A preparation method of special synthetic paper with the function of adsorbing benzene

technical field

The invention belongs to the technical field of organic-inorganic composite material production, and in particular relates to a method for preparing special synthetic paper with the function of absorbing benzene.

Background technique

Special synthetic paper, also known as the second generation paper. It is a new type of paper processed by a special process with polymer materials and inorganic fillers as the main raw materials. It is a multifunctional composite material with the characteristics of plastic and traditional paper. The production process of special synthetic paper has less pollution, and it has better performance than traditional paper, such as waterproof, moisture-proof, folding resistance, flame retardant, etc. It can be widely used in indoor wallpaper, outdoor advertising and periodical printing, etc. It is a modern paper A major overhaul of production.

At present, although special synthetic paper products have good writing and printing effects, they still have some shortcomings when applied to interior decoration wallpapers, such as the poor performance of adsorbing toxic and harmful gases such as indoor vapor phase benzene. Studies have shown that a large number of chemical raw materials used in architectural decoration, such as coatings, paints and fillers, contain a large amount of organic solvents, which will release a large amount of benzene into the indoor air after decoration. According to medical science, short-term exposure to benzene may cause reactions such as headache, nausea, vomiting, confusion, loss of consciousness, coma, convulsions, etc., and severe cases may cause death due to central paralysis. Long-term exposure to benzene will cause great damage to the blood, cause chronic poisoning, and lead to leukemia and other diseases. Therefore, it is necessary to improve the wallpaper on the existing basis and combine the special functions of special synthetic paper, so that it can effectively adsorb toxic and harmful gases such as indoor gas phase benzene, so that special synthetic paper has a broader development prospect in the field of interior decoration wallpaper .

Contents of the invention

The purpose of the present invention is to provide a preparation method of special synthetic paper with the function of absorbing benzene, which has easy-to-obtain materials and simple process.

The purpose of the present invention is achieved through the following technical solutions:

The preparation method of the special synthetic paper with the function of adsorbing benzene comprises the steps in the following order:

(1) Stir 10-20 parts by weight of polyurethane particles and 50-120 parts by weight of solvent in a reactor for 30 minutes, then let stand for 48 hours to completely dissolve the polyurethane particles in the solvent to obtain a polyurethane solution;

(2) Add 14.1 to 32.6 parts by weight of n-butyl titanate to the polyurethane solution obtained in step (1), stir for 30 minutes, and mix evenly to obtain a mixed solution;

(3) Add 2 to 55 parts by weight of molecular sieve powder to the mixed solution obtained in step (2), stir for 1 hour to obtain a solid-liquid mixture, and let stand to defoam;

(4) Coat the solid-liquid mixture obtained in step (3) on the release paper, and then immerse it in the aqueous solution of glacial acetic acid. After the solid-liquid mixture is completely solidified and forms a film, take it out and place it in an electric blast drying oven to dry for 1 hour. ;

(5) Peel off the film and the release paper, and then cut the film product into a suitable size according to the requirements, and then obtain a special synthetic paper product with the function of absorbing benzene.

Preferably, the polyurethane particles in step (1) are at least one of polyester thermoplastic polyurethane particles and polyether thermoplastic polyurethane particles, and the Shore hardness thereof is 85A-95A.

Preferably, the solvent in step (1) is at least one of N,N-dimethylformamide and N,N-dimethylacetamide.

Preferably, the molecular sieve powder in step (3) is 10X molecular sieve powder, and the particle size is one of 325 mesh, 400 mesh, 500 mesh and 600 mesh or a mixture of two or more.

Preferably, the concentration of the aqueous solution of glacial acetic acid in step (4) is 5%.

Preferably, the temperature in the electric blast drying oven described in step (4) is 50-60°C.

Preferably, in step (4), by adjusting the thickness of the solid-liquid mixture coated on the release paper, the total thickness of the special synthetic paper is controlled to be 0.05-0.15mm, and the mass is 3.3-4.8g based on the area of A4 paper.

Preferably, the appearance of the special synthetic paper obtained in step (5) is white, the mass percentage of polyurethane in the special synthetic paper is 13.8% to 77.2%, the mass percentage of molecular sieve is 8.6% to 75.7%, and titanium dioxide is generated by hydrolysis of n-butyl titanate The mass percentage is 9.3% to 14.2%.

Compared with the existing synthetic paper production technology, the present invention has the following characteristics:

(1) The 10X molecular sieve powder inside the special synthetic paper of the present invention and the porous structure of the special synthetic paper greatly improve the adsorption performance of the special synthetic paper to benzene in the indoor air.

(2) During the production process of the present invention, the titanium dioxide particles generated inside the synthetic paper can produce photocatalytic degradation of the benzene absorbed by the special synthetic paper, and can decompose it into non-toxic substances to purify the air.

Detailed ways

The present invention will be further described in detail through specific examples below, wherein the raw materials are all industrial products, and the equipment is common industrial production equipment.

Example 1:

Weigh 15 kg of polyester thermoplastic polyurethane with a Shore hardness of 85A and 55 kg of N,N-dimethylformamide in the reactor, stir for 30 minutes and then let it stand for 48 hours to completely dissolve the polyester thermoplastic polyurethane In N,N-dimethylformamide; add 16.3 kg of n-butyl titanate and stir for 30 minutes to obtain a mixed solution; then add 22.5 kg of 325 mesh 10X molecular sieve powder to the mixed solution and stir for 1 hour to obtain a solid-liquid mixture ;Statically defoam the obtained solid-liquid mixture and spread it on the release paper, and immediately immerse it in 5% glacial acetic acid aqueous solution together; After the solid-liquid mixture is completely solidified into a film, take it out and place it in an electric blast to dry Dry in the box at 50°C for 1 hour, and peel off the film from the release paper; control the total thickness of the film to 0.05mm by adjusting the thickness of the solid-liquid mixture coated on the release paper; finally, cut the film product according to the requirements Size, that is, to obtain special synthetic paper products with the function of absorbing benzene.

The special synthetic paper obtained in this embodiment has a mass percentage of polyester thermoplastic polyurethane of 36.3%, a molecular sieve powder of 54.4%, and a titanium dioxide mass percentage of 9.3%. The special synthetic paper product is white in color, 0.05mm in thickness, and 3.3g in weight (based on the area of A4 paper).

Example 2:

Weigh 10 kg of polyether thermoplastic polyurethane with a Shore hardness of 90A and 120 kg of N,N-dimethylacetamide in the reactor, stir for 30 minutes and then let it stand for 48 hours to completely dissolve the polyether thermoplastic polyurethane In N,N-dimethylacetamide; add 32.6 kg of n-butyl titanate and stir for 30 minutes to obtain a mixed solution; then add 55 kg of 400 mesh 10X molecular sieve powder to the mixed solution and stir for 1 hour to obtain a solid-liquid mixture ;Statically defoam the obtained solid-liquid mixture and spread it on the release paper, and immediately immerse it in 5% glacial acetic acid aqueous solution together; After the solid-liquid mixture is completely solidified into a film, take it out and place it in an electric blast to dry Dry in the box at 53°C for 1 hour, and peel off the film from the release paper; control the total thickness of the film to 0.07mm by adjusting the thickness of the solid-liquid mixture coated on the release paper; finally, cut the film product to a suitable size Size, that is, to obtain special synthetic paper products with the function of absorbing benzene.

The mass percentage of polyether thermoplastic polyurethane in the special synthetic paper obtained in this embodiment is 13.8%, the mass percentage of molecular sieve powder is 75.7%, and the mass percentage of titanium dioxide is 10.5%. The special paper product is white in color, 0.07mm in thickness, and 3.6g in weight (based on the area of A4 paper).

Example 3:

Weigh 20 kg of polyester thermoplastic polyurethane with a Shore hardness of 95A and 120 kg of N,N-dimethylformamide in the reactor, stir for 30 minutes and then let it stand for 48 hours to completely dissolve the polyester thermoplastic polyurethane In N,N-dimethylformamide; add 28.2 kg of n-butyl titanate and stir for 30 minutes to obtain a mixed solution; then add 20 kg of 500 mesh 10X molecular sieve powder to the mixed solution and stir for 1 hour to obtain a solid-liquid mixture ;Statically defoam the obtained solid-liquid mixture and spread it on the release paper, and immediately immerse it in 5% glacial acetic acid aqueous solution together; After the solid-liquid mixture is completely solidified into a film, take it out and place it in an electric blast to dry Dry in the box at 57°C for 1 hour, and peel off the film from the release paper; control the total thickness of the film to 0.09mm by adjusting the thickness of the solid-liquid mixture coated on the release paper; finally, cut the film product according to the requirements Size, that is, to obtain special synthetic paper products with the function of absorbing benzene.

The special synthetic paper obtained in this embodiment has a mass percentage of polyester thermoplastic polyurethane of 42.9%, a molecular sieve powder of 42.9%, and a titanium dioxide mass percentage of 14.2%. The specialty paper product is white in color, 0.09mm in thickness, and 3.9g in weight (based on the area of A4 paper).

Example 4:

Weigh 18 kg of polyether thermoplastic polyurethane with a Shore hardness of 94A and 60 kg of N,N-dimethylacetamide in the reactor, stir for 30 minutes and then let it stand for 48 hours to completely dissolve the polyether thermoplastic polyurethane In N,N-dimethylacetamide; add 14.1 kg of n-butyl titanate and stir for 30 minutes to obtain a mixed solution; then add 2 kg of 600 mesh 10X molecular sieve powder to the mixed solution and stir for 1 hour to obtain a solid-liquid mixture ;Statically defoam the obtained solid-liquid mixture and spread it on the release paper, and immediately immerse it in 5% glacial acetic acid aqueous solution together; After the solid-liquid mixture is completely solidified into a film, take it out and place it in an electric blast to dry Dry in the box at 59°C for 1 hour, and peel off the film from the release paper; control the total thickness of the film to 0.11mm by adjusting the thickness of the solid-liquid mixture coated on the release paper; finally, cut the film product according to the requirements Size, that is, to obtain special synthetic paper products with the function of absorbing benzene.

The mass percentage of polyether thermoplastic polyurethane in the special synthetic paper obtained in this example is 77.2%, the mass percentage of molecular sieve powder is 8.6%, and the mass percentage of titanium dioxide is 14.2%. The special synthetic paper product is white in color, 0.11mm in thickness, and 4.1g in weight (based on the area of A4 paper).

Example 5:

Weigh 20 kg of polyether thermoplastic polyurethane with a Shore hardness of 86A and 57 kg of N,N-dimethylacetamide in the reactor, stir for 30 minutes and then let it stand for 48 hours to completely dissolve the polyether thermoplastic polyurethane In N,N-dimethylacetamide; add 14.5 kg of n-butyl titanate and stir for 30 minutes to obtain a mixed solution; 1.25 kg and stirred for 1 hour to obtain a solid-liquid mixture; put the obtained solid-liquid mixture on the release paper after standing to defoam, and immediately immerse it in 5% glacial acetic acid aqueous solution together; wait until the solid-liquid mixture is completely solidified to form a film Finally, take it out and place it in an electric blast drying oven to dry at 60°C for 1 hour, and peel off the film from the release paper; control the total thickness of the film to 0.15mm by adjusting the thickness of the solid-liquid mixture coated on the release paper ;Finally, the film product is cut to a suitable size according to the demand, that is, a special synthetic paper product with the function of absorbing benzene can be obtained.

The special synthetic paper obtained in this example has a mass percentage of polyester thermoplastic polyurethane of 70.4%, a mass percentage of molecular sieve powder of 17.6%, and a mass percentage of titanium dioxide of 12.0%. Special synthetic paper is white in color, 0.15mm in thickness, and 4.8g in weight (based on the area of A4 paper).

Claims (5)

1. a kind of preparation method of the special synthetic paper with adsorption benzene function is characterized in that comprising the steps of following order: (1) Stir 10-20 parts by weight of polyurethane particles and 50-120 parts by weight of solvent in a reactor for 30 minutes, then let stand for 48 hours to completely dissolve the polyurethane particles in the solvent to obtain a polyurethane solution; (2) Add 14.1 to 32.6 parts by weight of n-butyl titanate to the polyurethane solution obtained in step (1), stir for 30 minutes, and mix evenly to obtain a mixed solution; (3) Add 2 to 55 parts by weight of molecular sieve powder to the mixed solution obtained in step (2), stir for 1 hour to obtain a solid-liquid mixture, and let stand to defoam; (4) Coat the solid-liquid mixture obtained in step (3) on the release paper, and then immerse it in the aqueous solution of glacial acetic acid. After the solid-liquid mixture is completely solidified and forms a film, take it out and place it in an electric blast drying oven to dry for 1 hour. ; (5) Peel off the film and the release paper, and then cut the film product into a suitable size according to the demand, and then obtain a special synthetic paper product with the function of absorbing benzene; The molecular sieve powder described in step (3) is 10X molecular sieve powder, and the particle size is one of 325 mesh, 400 mesh, 500 mesh and 600 mesh or a mixture of two or more; The glacial acetic acid aqueous solution concentration described in step (4) is 5%; The appearance of the special synthetic paper obtained in step (5) is white, the mass percentage of polyurethane in the special synthetic paper is 13.8% to 77.2%, the mass percentage of molecular sieve is 8.6% to 75.7%, and the mass percentage of titanium dioxide generated by hydrolysis of n-butyl titanate 9.3% to 14.2%. 2. according to claim 1, there is the preparation method of the special synthetic paper that absorbs benzene function, it is characterized in that: the polyurethane particle described in step (1) is at least in polyester type thermoplastic polyurethane particle and polyether type thermoplastic polyurethane particle One, its Shore hardness is 85A-95A. 3. according to the preparation method of the special synthetic paper with adsorption benzene function of claim 1, it is characterized in that: the solvent described in step (1) is N,N-dimethylformamide and N,N-dimethyl at least one of acetamides. 4. The method for preparing special synthetic paper with the function of absorbing benzene according to claim 1, characterized in that: the temperature in the electric blast drying oven described in step (4) is 50-60°C. 5. according to the preparation method of the described special synthetic paper with adsorption benzene function of claim 1, it is characterized in that: in step (4), control the total amount of special synthetic paper by regulating the solid-liquid mixture thickness that is coated on the release paper. The thickness is 0.05-0.15mm, and the mass is 3.3-4.8g based on the area of A4 paper.