Special eye protection paper and preparation method thereof

Abstract

The invention discloses a preparation method of special eye protection paper, which comprises the following steps: taking nano titanium dioxide and nano zinc oxide, mixing, adding propylene glycol, feeding into an ultrasonic disperser, dispersing to obtain a solution 1, taking acrylic resin, adding a polyurethane solvent, and uniformly stirring until the acrylic resin is completely dissolved to obtain a solution 2. The transparent and uniform coating is used, so that the original white and texture of the paper are kept, the visual experience of a user can be effectively improved, and a designer can enjoy clear paper texture and is not interfered by a light yellow ground color in daily drawing and design, so that the working efficiency and creation inspiration are improved; the raw materials such as propylene glycol, polyvinylpyrrolidone and the like adopted by the invention are non-toxic and harmless environment-friendly materials, do not contain harmful substances, have no adverse effect on human health and accord with the green and environment-friendly trend, and design workers do not need to worry about the release of the harmful substances in the use process.

Description

Technical Field

[0001] The invention relates to the field of eye protection paper processing technology, and in particular to special eye protection paper and a preparation method thereof. Background Art

[0002] The white paper people use daily has white full-frequency reflection and is irritating to the eyes. The special paper for eye protection is commonly light yellow paper, which can reflect specific spectrum color light and reduce the reflection of blue light and ultraviolet light, thereby effectively improving the impact of white full-frequency light on vision and achieving the effect of preventing myopia.

[0003] Most of the existing eye protection papers are yellow or light yellow. This kind of paper has no effect on regular writing, but it is not suitable for some designers. Its background color is light yellow or yellow, which will affect the color design work thereon. Therefore, a special eye protection paper and a preparation method are proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a special eye protection paper and a preparation method, which can reduce the reflection of blue light and ultraviolet rays without changing the color of white paper.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing special eye protection paper, comprising the following steps:

[0007] S1: Mix nano titanium dioxide and nano zinc oxide, add propylene glycol, and then send into an ultrasonic disperser for dispersion to obtain solution 1;

[0008] S2: Take acrylic resin, add polyurethane solvent, and stir evenly until the acrylic resin is completely dissolved to obtain solution 2;

[0009] S3: Take a surfactant, add purified water, stir and mix well to obtain solution 3;

[0010] S4: adding polyvinyl pyrrolidone to solution 2, and mixing evenly until the polyvinyl pyrrolidone is completely dissolved to obtain solution 4;

[0011] S5: adding solution 1 to solution 4 and uniformly mixing them using a high shear homogenizer, and adding solution 3 three times during this process to obtain a transparent coating solution;

[0012] S6: Adjust the viscosity of the transparent coating liquid to 1500-2000 cps, evenly apply it on the surface of white paper, and use a dryer to dry it to obtain a finished product.

[0013] As a preferred technical solution of the present invention, the acrylic resin is taken, a polyurethane solvent is added, and the mixture is stirred evenly until the acrylic resin is completely dissolved to obtain a solution 2, wherein the mixture is heated to 45-50 degrees Celsius during the stirring process.

[0014] As a preferred technical solution of the present invention, the surfactant is taken, purified water is added, and the mixture is stirred and mixed uniformly to obtain a solution 3, wherein the surfactant is sodium dodecyl sulfate or hexadecyltrimethylammonium chloride.

[0015] As a preferred technical solution of the present invention, the viscosity of the transparent coating liquid is adjusted to 1500-2000cps, and it is evenly coated on the surface of white paper and dried using a dryer to obtain a finished product, wherein the method for adjusting the viscosity of the transparent coating liquid is to add propylene glycol for dilution.

[0016] A special paper for eye protection, prepared by the preparation method according to any one of claims 1 to 4.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention effectively absorbs ultraviolet rays and blue light by coating a mixture of nano titanium dioxide and nano zinc oxide on the surface of paper. Due to the use of a transparent and uniform coating, the paper can effectively enhance the user's visual experience while maintaining its original white color and texture. Designers can enjoy clear paper textures in daily drawing and design without being disturbed by the yellowish background, thereby improving work efficiency and creative inspiration. The raw materials used in the present invention, such as propylene glycol and polyvinyl pyrrolidone, are non-toxic, harmless and environmentally friendly materials, do not contain harmful substances, and have no adverse effects on human health, which conforms to the trend of green environmental protection. Designers do not have to worry about the release of harmful substances during use and can use it with peace of mind. The preparation process of this special eye protection paper is simple, the coating process is easy to control, and the raw materials used are widely available and easy to mass produce. DETAILED DESCRIPTION

[0019] Example 1

[0020] The present invention provides S1: nano titanium dioxide and nano zinc oxide are mixed, propylene glycol is added, and then the mixture is sent into an ultrasonic disperser for dispersion to obtain solution 1.

[0021] In this step, firstly, appropriate amounts of nano titanium dioxide and nano zinc oxide are weighed and mixed in a weight ratio of 1:2, and then an appropriate amount of propylene glycol is added, and the amount of propylene glycol added is usually 20%-30% by weight of the nano powder. Then, the mixture is sent to an ultrasonic disperser and dispersed by the high-frequency vibration of ultrasound. The ultrasonic dispersion time is usually 10-30 minutes, and the specific time can be adjusted appropriately according to the dispersion effect. The dispersed solution is transparent, and solution 1 is obtained.

[0022] S2: Take acrylic resin, add polyurethane solvent, and stir evenly until the acrylic resin is completely dissolved to obtain solution 2.

[0023] In this step, firstly, an appropriate amount of acrylic resin is weighed and added to the polyurethane solvent. The amount of the polyurethane solvent is 1.5-3 times (volume ratio) of the acrylic resin, and the mixture is stirred at a medium speed using a stirrer. During the stirring process, the mixture needs to be heated to 45-50 degrees Celsius to promote the dissolution of the acrylic resin. The stirring time is 1-2 hours until the acrylic resin is completely dissolved to obtain a uniform solution 2.

[0024] S3: Take a surfactant, add purified water, stir and mix evenly to obtain solution 3.

[0025] In this step, take a proper amount of surfactant, which may be sodium lauryl sulfate or cetyltrimethylammonium chloride, add the selected surfactant into purified water and stir the mixture at a moderate speed for 10-15 minutes until the surfactant is completely dissolved in the water to form a uniform solution 3.

[0026] S4: Add polyvinyl pyrrolidone to solution 2, and mix evenly until the polyvinyl pyrrolidone is completely dissolved to obtain solution 4.

[0027] In this step, polyvinyl pyrrolidone (PVP) is added to solution 2 in an amount of 5%-10% of the total weight of solution 2. A stirrer is used to fully stir the solution to ensure that the polyvinyl pyrrolidone is completely dissolved in the solution. The stirring time is usually 30-60 minutes until solution 4 is uniform and transparent and the polyvinyl pyrrolidone is completely dissolved.

[0028] S5: Add solution 1 to solution 4 and mix them evenly using a high shear homogenizer. During this process, add solution 3 three times to obtain a transparent coating solution.

[0029] In this step, solution 1 is slowly added to solution 4 and mixed evenly using a high shear homogenizer. During the mixing process, solution 3 needs to be added three times to ensure uniform dispersion. Each time solution 3 is added, the stirring speed should be kept moderate to avoid bubbles and ensure that the mixture is completely uniform. The resulting liquid is transparent, i.e., a transparent coating liquid.

[0030] S6: Adjust the viscosity of the transparent coating liquid to 1500-2000 cps, evenly apply it on the surface of white paper, and use a dryer to dry it to obtain a finished product.

[0031] In this step, the viscosity of the transparent coating liquid is adjusted by adding an appropriate amount of propylene glycol, and the viscosity range is controlled between 1500-2000cps. After the viscosity is adjusted, the transparent coating liquid is evenly coated on the surface of white paper. During coating, a coating machine or a manual coating tool can be used to ensure uniform coating. The coated paper is sent to a dryer for drying. The drying temperature can be set to 55 degrees Celsius, and the drying time is appropriately adjusted according to the thickness and humidity of the coating, usually 10-30 minutes. The eye protection special paper finally obtained is the finished product of the present invention.

[0032] In summary, the present invention effectively absorbs ultraviolet rays and blue light by coating a mixture of nano titanium dioxide and nano zinc oxide on the surface of paper. Due to the use of a transparent and uniform coating, the paper can effectively enhance the user's visual experience while maintaining its original white color and texture. Designers can enjoy the clear texture of paper in daily drawing and design without being disturbed by the yellowish background, thereby improving work efficiency and creative inspiration. The raw materials used in the present invention, such as propylene glycol and polyvinyl pyrrolidone, are non-toxic, harmless and environmentally friendly materials, do not contain harmful substances, and have no adverse effects on human health, which conforms to the trend of green environmental protection. Designers do not have to worry about the release of harmful substances during use and can use it with peace of mind. The preparation process of this special eye protection paper is simple, the coating process is easy to control, and the raw materials used are widely available and easy to mass produce.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing special eye protection paper, characterized in that: The following steps are involved: S1: Mix nano titanium dioxide and nano zinc oxide, add propylene glycol, and then send into an ultrasonic disperser for dispersion to obtain solution 1; S2: Take acrylic resin, add polyurethane solvent, and stir evenly until the acrylic resin is completely dissolved to obtain solution 2; S3: Take a surfactant, add purified water, stir and mix well to obtain solution 3; S4: adding polyvinyl pyrrolidone to solution 2, and mixing evenly until the polyvinyl pyrrolidone is completely dissolved to obtain solution 4; S5: adding solution 1 to solution 4 and uniformly mixing them using a high shear homogenizer, and adding solution 3 three times during this process to obtain a transparent coating solution; S6: Adjust the viscosity of the transparent coating liquid to 1500-2000 cps, evenly apply it on the surface of white paper, and use a dryer to dry it to obtain a finished product.

2. The eye protection paper and preparation method according to claim 1, characterized in that: In step 2, take acrylic resin, add polyurethane solvent, and stir evenly until the acrylic resin is completely dissolved to obtain solution 2, wherein the solution is heated to 45-50 degrees Celsius during the stirring process.

3. The eye protection paper and preparation method according to claim 1, characterized in that: In step 3, take a surfactant, add purified water, stir and mix evenly to obtain solution 3, wherein the surfactant is sodium dodecyl sulfate or hexadecyltrimethylammonium chloride.

4. The eye protection paper and preparation method according to claim 1, characterized in that: In step 6, the viscosity of the transparent coating liquid is adjusted to 1500-2000 cps, and the transparent coating liquid is evenly coated on the surface of white paper and dried using a dryer to obtain a finished product, wherein the method for adjusting the viscosity of the transparent coating liquid is to add propylene glycol for dilution.

5. A special paper for eye protection, characterized in that: Prepared by the preparation method according to any one of claims 1 to 4.