Production process of paper for preventing myopia

Abstract

The application relates to the field of paper production and particularly discloses a production process of myopia-preventing paper, which comprises the following steps: S1, beating and defibrating fiber raw materials to obtain a mixture; S2, mixing the mixture with water and stirring uniformly to obtain pulp; and S3, uniformly mixing the pulp with other components, then forming, pressing, drying and finishing to obtain eye-protecting paper; the paper comprises the following components in parts by weight: 70-90 parts of fiber raw materials, 10-20 parts of yellow adjusting agents, 3-10 parts of moisturizing agents, 15-30 parts of retention aids and 8-15 parts of fillers; the fiber raw materials comprise softwood mechanical pulp, softwood pulp and broadleaf wood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the broadleaf wood pulp is (1.5-2):1:(1.5-2). The addition of the yellow adjusting agents enables the myopia-preventing paper to be light yellow, so that the paper can effectively absorb yellow and purple light rays which are harmful to human eyes in daily light, thereby realizing the protection of eyesight and making the user less likely to develop myopia.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paper production, more particularly, it relates to a production process of anti-myopia paper. BACKGROUND

[0002] Paper is a thin sheet made of plant fibers, used for writing, drawing, printing books and newspapers, packaging, etc.

[0003] At present, books, notebooks, etc. are often made by using white paper for gluing, but the brightness of the paper is high, when the user looks at the books, notebooks, etc. for a long time, the visual fatigue is strong, and the eyesight will gradually decrease, and myopia will occur. SUMMARY

[0004] In order to protect the eyesight and make the user not prone to myopia, the present application provides a production process of anti-myopia paper.

[0005] The present application provides a production process of anti-myopia paper, which adopts the following technical scheme:

[0006] A production process of anti-myopia paper, comprising the following steps:

[0007] S1, the fiber raw material is beaten and defibered to obtain a mixture;

[0008] S2, the mixture is mixed with water and stirred uniformly to obtain a slurry;

[0009] S3, the slurry is mixed with other components uniformly, and then formed, pressed, dried and finished to obtain eye protection paper;

[0010] The paper comprises the following components by weight: 70-90 parts of fiber raw material, 10-20 parts of yellow adjusting agent, 3-10 parts of moisturizing agent, 15-30 parts of retention aid and 8-15 parts of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and hardwood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the hardwood pulp is (1.5-2):1:(1.5-2).

[0011] By adopting the above technical scheme, part of the light in daily light has a harmful effect on the human eye, among which yellow and purple light has the characteristics of high energy and strong penetration, and these two kinds of light can directly act on the ciliary muscle of the human eye, thereby causing the human eye to be prone to myopia, and the addition of the yellow adjusting agent makes the anti-myopia paper have a light yellow color, so that the paper can effectively absorb the harmful yellow and purple light in daily light to the human eye, thereby achieving the purpose of protecting the eyesight and making the user not prone to myopia.

[0012] Preferably, the yellow adjusting agent is a yellow microcapsule, and the core material of the yellow microcapsule is natural rice yellow pigment.

[0013] By adopting the technical scheme, the natural rice yellow pigment is yellow in color, and adding the natural rice yellow pigment into paper can make the paper appear light yellow, thereby achieving the effect of preventing myopia; in the application, the natural rice yellow pigment is made into microcapsules, which can improve the stability and dispersibility of the natural rice yellow pigment in paper production, thereby preventing the paper from having uneven color.

[0014] Preferably, the wall material of the yellow microcapsules is cationic starch.

[0015] By adopting the technical scheme, the wall material is cationic starch, which can form microcapsules to protect the natural rice yellow pigment, and the surface of paper fibers has a negative charge, while the cationic starch has a positive charge, so that the cationic starch can be combined with the surface of the paper fibers by electrostatic attraction, and can form chemical bonds and hydrogen bonds between the fibers, thereby increasing the binding force between the fibers, and improving the strength of the paper; in addition, the cationic starch can fill the gaps in the fibers, thereby filling the uneven surface of the fibers, making the surface of the paper smoother, and improving the use performance and hand feeling of the paper.

[0016] Preferably, the moisturizing agent is sorbitol.

[0017] By adopting the technical scheme, the sorbitol can form a uniform film on the surface of the paper, which can fill the small concave and convex places on the surface of the paper, thereby making the surface of the paper smoother, and reducing the specular reflection of the paper to reduce the glare caused by strong light reflection, thereby further achieving the purpose of preventing myopia; in addition, the sorbitol has a moisturizing effect, which can keep the paper fibers moist, soft and elastic, and the paper with good flexibility is not easy to produce strong refraction when the user flips, thereby reducing the stimulation to the eyes caused by the change of light reflection, and further achieving the purpose of preventing myopia.

[0018] Preferably, the filler is calcium carbonate.

[0019] By adopting the technical scheme, after the calcium carbonate is added to the paper, on the one hand, the calcium carbonate can effectively scatter light, reduce the light transmittance of the paper, and increase the opacity, so that the paper is not easy to appear the case of writing trace through printing when writing on both sides, thereby improving the practicability of the paper; on the other hand, as an alkaline substance, the calcium carbonate can make the paper weakly alkaline, inhibit the generation and accumulation of acidic substances, slow down the aging of the paper, and prolong the service life; in addition, due to the high hygroscopicity of sorbitol, the paper will absorb too much water, causing the paper to swell, curl and deform, and the addition of calcium carbonate can form a barrier layer in the paper to reduce the penetration and erosion of water to the paper fibers, thereby improving the water resistance of the paper to reduce the deformation of the paper; in addition, the calcium carbonate is supplemented as a filler between the paper fibers, and the cationic starch can anchor the calcium carbonate particles on the fibers to reduce the problem of the decrease of the bonding force between the fibers caused by the filling of calcium carbonate, thereby making the paper maintain good strength after the addition of calcium carbonate.

[0020] Preferably, the retention aid comprises cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the cationic polyacrylamide and the anionic polyacrylamide is 1: (1-1.2).

[0021] By adopting the technical scheme, the cationic polyacrylamide has a positive charge and can be combined with the negative charge on the surface of the paper fibers through electrostatic attraction, and the long-chain molecules of the anionic polyacrylamide can play a bridging role between the fibers to connect different fibers together, and when the two are used together, the combination and bridging effect are mutually synergistic, so that the bonding force between the fibers is significantly enhanced, thereby improving the strength of the paper; in addition, the anionic polyacrylamide molecular chain contains a large number of carboxyl groups and other anion groups, which can cause electrostatic attraction and complexation with positively charged calcium carbonate particles and certain groups on the surface of the paper fibers, so that the calcium carbonate is more uniformly distributed between the fibers and connected through the bridging effect, thereby increasing the bonding force between the fibers to further improve the strength of the paper.

[0022] Preferably, the retention aid comprises polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, cationic polyacrylamide and anionic polyacrylamide is (2.5-3.5):1: (1-1.2).

[0023] By adopting the technical scheme, the retention aid used in the present application has a high positive charge density, which can well neutralize the anionic garbage in the pulp system, thereby shielding the anionic garbage, so that the subsequently added cationic polyacrylamide can fully play a role, and more positive charge adsorption points are left for the subsequently added anionic polyacrylamide, thereby greatly improving the retention performance of the light paper pulp system in the wire part, and also improving the smoothness and opacity of the paper.

[0024] Preferably, the S3: polyetherimide, cationic polyacrylamide and anionic polyacrylamide are added to the slurry in turn and mixed uniformly, and then other components are added and mixed uniformly, and then formed, pressed, dried, finished to obtain the eye protection paper.

[0025] In summary, the present application has the following beneficial effects:

[0026] 1. Some light rays in daily light have harmful effects on the human eye, among which yellow and purple light has the characteristics of high energy and strong penetration. These two kinds of light can directly act on the ciliary muscle of the human eye, thereby causing the human eye to be prone to myopia. The addition of yellow adjuster makes the anti-myopia paper yellow, so that the paper can effectively absorb harmful yellow and purple light rays in daily light, thereby protecting the vision, so that the user is less likely to develop myopia. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in combination with examples and preparation examples; natural yellow pigment is purchased from Henan Runcheng Chemical Product Co., Ltd., and the item number is 20188; cationic starch is purchased from Guangdong Hongxin Biological Technology Co., Ltd., and the model number is CS-YLO3P; cationic polyacrylamide is purchased from Shandong Delan Chemical Co., Ltd.; anionic polyacrylamide is purchased from Shandong Wanhuatianhe New Material Co., Ltd.; polyetherimide is purchased from Dongguan Jinqun Plastic Co., Ltd.

[0028] Preparation example of raw materials

[0029] Preparation example 1

[0030] Take 1 kg of natural yellow pigment and 0.8 kg of cationic starch, dissolve the natural yellow pigment in 150 mL of corn oil, and heat in a 60℃ water bath to obtain an oil phase;

[0031] Take 5 L of distilled water and heat to 60℃, then add the cationic starch to the distilled water and stir to dissolve until transparent to obtain a solution, then add 8 g of Tween-80 to the solution to obtain an aqueous phase;

[0032] Slowly pour the oil phase into the aqueous phase and shear at a speed of 10000 rpm for 3 min to form a uniform emulsion, and then spray dry the emulsion to obtain yellow microcapsules; the inlet air temperature in the spray drying is 180℃ and the outlet air temperature is 80℃.

[0033] Preparation example 2

[0034] Take 1 kg of natural yellow pigment and 1.4 kg of cationic starch, dissolve the natural yellow pigment in 150 mL of corn oil, and heat in a 60℃ water bath to obtain an oil phase;

[0035] Take 7L distilled water heated to 60℃, then the cationic starch is added to the distilled water stirring to dissolve to transparent solution, then 14g Tween-80 is added to the solution, to get the water phase;

[0036] The oil phase is slowly poured into the water phase, and sheared at a speed of 10000 rpm for 3 min to form a uniform emulsion, and the emulsion is prepared by spray drying to obtain yellow microcapsules; wherein the inlet air temperature of spray drying is 180℃, and the outlet air temperature is 80℃.

[0037] Preparation Example 3

[0038] Take 7L distilled water heated to 60℃, then the cationic starch is added to the distilled water stirring to dissolve to transparent solution, then 14g Tween-80 is added to the solution, to get the water phase;

[0039] Take 7L distilled water heated to 60℃, then the cationic starch is added to the distilled water stirring to dissolve to transparent solution, then 14g Tween-80 is added to the solution, to get the water phase;

[0040] The oil phase is slowly poured into the water phase, and sheared at a speed of 10000 rpm for 3 min to form a uniform emulsion, and the emulsion is prepared by spray drying to obtain yellow microcapsules; wherein the inlet air temperature of spray drying is 180℃, and the outlet air temperature is 80℃.

[0041] Preparation Example 4

[0042] Take 7L distilled water heated to 60℃, then the cationic starch is added to the distilled water stirring to dissolve to transparent solution, then 14g Tween-80 is added to the solution, to get the water phase;

[0043] Take 7L distilled water heated to 60℃, then the cationic starch is added to the distilled water stirring to dissolve to transparent solution, then 14g Tween-80 is added to the solution, to get the water phase;

[0044] The oil phase is slowly poured into the water phase, and sheared at a speed of 10000 rpm for 3 min to form a uniform emulsion, and the emulsion is prepared by spray drying to obtain yellow microcapsules; wherein the inlet air temperature of spray drying is 180℃, and the outlet air temperature is 80℃. Example Example 1

[0045] A production process of a myopia-preventing paper, comprising the following steps:

[0046] S1, the fiber raw material is beaten and loosened to obtain a mixture;

[0047] S2, the mixture is mixed with water and stirred uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0048] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0049] The paper comprises the following components by weight: 70 kg of fiber raw material, 10 kg of yellow adjusting agent, 3 kg of moisturizing agent, 15 kg of retention aid and 8 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.5:1:1.5; the yellow adjusting agent is the yellow microcapsule prepared in the preparation example 1, the moisturizing agent is sorbitol, the filler is calcium carbonate, and the retention aid is cationic polyacrylamide. Example 2

[0050] A production process of the paper for preventing myopia, comprising the following steps:

[0051] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0052] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0053] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0054] The paper comprises the following components by weight: 90 kg of fiber raw material, 20 kg of yellow adjusting agent, 10 kg of moisturizing agent, 30 kg of retention aid and 15 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.5:1:1.5, the yellow adjusting agent is the yellow microcapsule prepared in the preparation example 1, the moisturizing agent is sorbitol, the filler is calcium carbonate, and the retention aid is cationic polyacrylamide. Example 3

[0055] A production process of the paper for preventing myopia, comprising the following steps:

[0056] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0057] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0058] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0059] Paper contains the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention aid and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broad-leaved wood pulp, the weight ratio of the softwood mechanical pulp, the softwood pulp and the broad-leaved wood pulp is 1.5:1:1.5, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 1, the moisturizing agent is sorbitol, the filler is calcium carbonate, and the retention aid is cationic polyacrylamide. Example 4

[0060] A production process of anti-myopia paper, comprising the following steps:

[0061] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0062] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0063] S3, mixing the slurry with other components uniformly, then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0064] Paper contains the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention aid and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broad-leaved wood pulp, the weight ratio of the softwood mechanical pulp, the softwood pulp and the broad-leaved wood pulp is 1.5:1:1.5, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 1, the moisturizing agent is sorbitol, the filler is calcium carbonate, and the retention aid is cationic polyacrylamide. Example 5

[0065] A production process of anti-myopia paper, comprising the following steps:

[0066] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0067] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0068] S3, mixing the slurry with other components uniformly, then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0069] Paper contains the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention aid and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broad-leaved wood pulp, the weight ratio of the softwood mechanical pulp, the softwood pulp and the broad-leaved wood pulp is 1.5:1:1.5, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 1, the moisturizing agent is sorbitol, the filler is calcium carbonate, and the retention aid is cationic polyacrylamide. Example 6

[0070] A production process of myopia-preventing paper, comprising the following steps:

[0071] S1, pulp and defibrate the fiber raw material to obtain a mixture;

[0072] S2, mix the mixture with water and stir uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0073] S3, mix the slurry with other components uniformly, then form, press, dry and finish to obtain the eye-protecting paper;

[0074] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention aid and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broadleaf wood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the broadleaf wood pulp is 1.5:1:1.5; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 4; the moisturizing agent is sorbitol; the filler is calcium carbonate; and the retention aid is cationic polyacrylamide. Example 7

[0075] A production process of myopia-preventing paper, comprising the following steps:

[0076] S1, pulp and defibrate the fiber raw material to obtain a mixture;

[0077] S2, mix the mixture with water and stir uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0078] S3, mix the slurry with other components uniformly, then form, press, dry and finish to obtain the eye-protecting paper;

[0079] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention aid and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broadleaf wood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the broadleaf wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; and the retention aid is cationic polyacrylamide. Example 8

[0080] A production process of myopia-preventing paper, comprising the following steps:

[0081] S1, pulp and defibrate the fiber raw material to obtain a mixture;

[0082] S2, mix the mixture with water and stir uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0083] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0084] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 2:1:2; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; and the retention agent is cationic polyacrylamide. Example 9

[0085] A production process of the paper for preventing myopia, comprising the following steps:

[0086] S1, beating and defibrating the fiber raw material to obtain a mixture;

[0087] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0088] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0089] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is kaolin; and the retention agent is cationic polyacrylamide. Example 10

[0090] A production process of the paper for preventing myopia, comprising the following steps:

[0091] S1, beating and defibrating the fiber raw material to obtain a mixture;

[0092] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0093] S3, mixing the slurry with other components uniformly, then forming, pressing, drying, finishing to obtain the eye protection paper;

[0094] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is glycerol, the filler is calcium carbonate, and the retention agent is cationic polyacrylamide. Example 11

[0095] A production process of an anti-myopia paper, comprising the following steps:

[0096] S1, pulp beating and defibration of a fiber raw material to obtain a mixture;

[0097] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0098] S3, uniformly mixing the slurry with other components, and then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0099] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is glycerol, the filler is calcium carbonate, and the retention agent is cationic polyacrylamide. Example 12

[0100] A production process of an anti-myopia paper, comprising the following steps:

[0101] S1, pulp beating and defibration of a fiber raw material to obtain a mixture;

[0102] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0103] S3, uniformly mixing the slurry with other components, and then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0104] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is sorbitol, and the filler is calcium carbonate; the retention agent is anionic polyacrylamide and cationic polyacrylamide, and the mass ratio of the cationic polyacrylamide to the anionic polyacrylamide is 1:1.2. Example 13

[0105] A production process of the paper for preventing myopia, comprising the following steps:

[0106] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0107] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0108] S3, mixing the slurry with other components uniformly, then forming, pressing, drying and finishing to obtain the paper for preventing myopia;

[0109] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is sorbitol, and the filler is calcium carbonate; the retention agent is anionic polyacrylamide and cationic polyacrylamide, and the mass ratio of the cationic polyacrylamide to the anionic polyacrylamide is 1:1.2. Example 14

[0110] A production process of the paper for preventing myopia, comprising the following steps:

[0111] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0112] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0113] S3, mixing the slurry with other components uniformly, then forming, pressing, drying and finishing to obtain the paper for preventing myopia;

[0114] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is sorbitol, and the filler is calcium carbonate; the retention agent is anionic polyacrylamide and cationic polyacrylamide, and the mass ratio of the cationic polyacrylamide to the anionic polyacrylamide is 1:1.1. Example 15

[0115] A production process of the paper for preventing myopia, comprising the following steps:

[0116] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0117] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0118] S3, sequentially adding the cationic polyacrylamide and the anionic polyacrylamide into the slurry and mixing uniformly, then adding other components and mixing uniformly, and then forming, pressing, drying and finishing to obtain the eye-protecting paper;

[0119] The paper comprises the following components in parts by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7, the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3, the moisturizing agent is sorbitol, and the filler is calcium carbonate; the retention agent is anionic polyacrylamide and cationic polyacrylamide, and the mass ratio of the cationic polyacrylamide to the anionic polyacrylamide is 1:1.1. Example 16

[0120] A production process of the paper for preventing myopia, comprising the following steps:

[0121] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0122] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0123] S3, sequentially adding the cationic polyacrylamide and the anionic polyacrylamide into the slurry and mixing uniformly, then adding other components and mixing uniformly, and then forming, pressing, drying and finishing to obtain the eye-protecting paper;

[0124] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broad-leaved wood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the broad-leaved wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; the retention agent is polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide is 2.5:1:1.1. Example 17

[0125] A production process of the anti-myopia paper, comprising the following steps:

[0126] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0127] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0128] S3, sequentially adding polyetherimide, cationic polyacrylamide and anionic polyacrylamide into the slurry and mixing uniformly, then adding other components and mixing uniformly, then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0129] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and broad-leaved wood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the broad-leaved wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; the retention agent is polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide is 3.5:1:1.1. Example 18

[0130] A production process of the anti-myopia paper, comprising the following steps:

[0131] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0132] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0133] S3, sequentially adding polyetherimide, cationic polyacrylamide and anionic polyacrylamide into the slurry and mixing uniformly, then adding other components and mixing uniformly, then forming, pressing, drying and finishing to obtain the anti-myopia paper;

[0134] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; and the retention agent is polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide is 3:1:1.1. Example 19

[0135] A production process of the paper for preventing myopia comprises the following steps:

[0136] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0137] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0138] S3, uniformly mixing the slurry with other components, and then forming, pressing, drying and finishing to obtain the eye-protecting paper;

[0139] The paper comprises the following components by weight: 80 kg of fiber raw material, 15 kg of yellow adjusting agent, 6 kg of moisturizing agent, 23 kg of retention agent and 12 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.7:1:1.7; the yellow adjusting agent is the yellow microcapsule prepared in Preparation Example 3; the moisturizing agent is sorbitol; the filler is calcium carbonate; and the retention agent is polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide is 3:1:1.1. Comparative Example

[0140] Comparative Example 1

[0141] A production process of the paper for preventing myopia comprises the following steps:

[0142] S1, pulp beating and defibration of the fiber raw material to obtain a mixture;

[0143] S2, mixing the mixture with water and stirring uniformly to obtain a slurry, and the mass concentration of the slurry is 30%;

[0144] S3, uniformly mixing the slurry with other components, and then forming, pressing, drying and finishing to obtain the eye-protecting paper;

[0145] The paper comprises the following components by weight: 70 kg of fiber raw material, 10 kg of cationic starch, 3 kg of humectant, 15 kg of retention agent and 8 kg of filler; the fiber raw material comprises coniferous mechanical pulp, coniferous pulp and broad-leaved wood pulp, and the weight ratio of the coniferous mechanical pulp, the coniferous pulp and the broad-leaved wood pulp is 1.5:1:1.5; the humectant is sorbitol, the filler is calcium carbonate, and the retention agent is cationic polyacrylamide.

[0146] Performance detection test

[0147] Detection method

[0148] Whiteness detection: the whiteness of the eye protection paper is determined according to the standard GB / T 7974-2002, and the data is recorded in Table 1;

[0149] Strength detection: the dry tensile strength of the eye protection paper is determined according to the standard GB / T 453-1989, and the data is recorded in Table 1;

[0150] Water absorption rate: the water absorption rate of the paper is detected by using a Cobb water absorption tester, and the data is recorded in Table 1;

[0151] Smoothness detection: the smoothness of the eye protection paper is determined according to the standard GB / T 456-2009, and the data is recorded in Table 1;

[0152] Opacity: the opacity of the eye protection paper is determined according to the standard GB / T 1543-2005, and the data is recorded in Table 1.

[0153] Table 1

[0154] Item Brightness (%) Dry tensile strength (N-m / g) Water absorption (g / m 2 )]]> Smoothness (front / back side) (s) Opacity (%) Example 1 63 22.93 36.1 50 / 48 85 Example 2 61 23.36 36.4 48 / 45 86 Example 3 61 23.02 35.8 51 / 48 86 Example 4 56 23.71 35.7 49 / 47 86 Example 5 54 23.83 35.3 52 / 51 87 Example 6 58 20.12 35.5 56 / 55 85 Example 7 56 23.95 35.5 51 / 48 86 Example 8 57 23.79 35.6 50 / 48 86 Example 9 56 19.13 38.5 57 / 55 85 Example 10 59 21.34 42.8 49 / 46 86 Example 11 58 19.23 34.0 45 / 42 90 Example 12 68 18.70 38.3 57 / 55 84 Example 13 66 18.36 38.1 56 / 55 83 Example 14 64 18.81 38.3 57 / 56 82 Example 15 56 24.36 35.1 53 / 51 91 Example 16 58 25.73 31.9 56 / 52 93 Example 17 58 25.51 31.8 55 / 52 94 Example 18 57 25.97 31.4 55 / 53 94 Example 19 65 20.70 36.3 55 / 53 86 Comparative Example 1 93 23.41 36.4 43 / 41 87

[0155] It can be seen from the combination of Example 1 and Comparative Example 1 and Table 1 that the addition of natural beige pigment reduces the whiteness of the paper, thereby achieving the purpose of preventing myopia;

[0156] It can be seen from the combination of Example 5, Example 6 and Table 1 that when the capsule wall of the yellow microcapsule is cationic starch, the dry tensile strength and smoothness of the paper are obviously higher, and the reason is that: cationic starch can form chemical bonds and hydrogen bonds between the fibers of the paper, thereby achieving the purpose of improving the strength of the paper; in addition, the cationic starch is compounded with calcium carbonate, so that the cationic starch can anchor the calcium carbonate particles on the fibers of the paper, thereby reducing the problem of the decrease of the inter-fiber bonding force caused by the addition of calcium carbonate, and achieving the purpose of maintaining the strength of the paper and improving the smoothness of the paper.

[0157] As can be seen from Examples 5 and 9 and Table 1, when calcium carbonate is used as filler, the strength and smoothness of the paper can be significantly improved, and the paper has better opacity. The reason is that calcium carbonate is added to the paper fibers as a filler, and cationic starch can anchor the calcium carbonate particles to the fibers, reducing the problem of decreased inter-fiber bonding force that may be caused by calcium carbonate filling. Thus, the paper can maintain good strength after adding calcium carbonate.

[0158] As can be seen from Examples 5 and 10 and Table 1, when sorbitol is used as the sizing agent, the dry tensile strength of the paper is significantly improved and the water absorption rate is significantly reduced. The reason is that glycerin has a higher water absorption rate than sorbitol, which leads to an increase in the water absorption rate of the paper and a significant decrease in the paper's strength.

[0159] As can be seen from Examples 5 and 11 and Table 1, when anionic polyacrylamide is used as the retention aid, the water absorption rate of the paper decreases significantly and the opacity increases significantly.

[0160] As can be seen from Examples 5, 14, and 15, and Table 1, when cationic and anionic polyacrylamide are added sequentially as retention aids, the water absorption rate and dry tensile strength of the paper are significantly improved. This is because cationic polyacrylamide carries a positive charge and can combine with the negative charge on the surface of paper fibers through electrostatic attraction. The long-chain molecules of anionic polyacrylamide can act as a bridge between fibers, connecting different fibers together. When used in combination, this combination and bridging effect work synergistically, significantly enhancing the bonding force between fibers and thus improving the paper's strength. Furthermore, the anionic polyacrylamide molecular chain contains a large number of anionic groups such as carboxyl groups, which can electrostatically attract and complex with positively charged calcium carbonate particles and certain groups on the surface of paper fibers, making calcium carbonate more evenly distributed between fibers and connecting them through bridging, thereby increasing the bonding force between fibers and further improving the paper's strength.

[0161] As can be seen from Examples 5, 10, and 13 and Table 1, when polyetherimide, anionic polyacrylamide, and cationic polyacrylamide are used as retention aids, the water absorption rate and dry tensile strength of the paper are significantly improved.

[0162] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A process for the production of anti-myopia paper, characterized in that, The method comprises the following steps: S1, beating and defibrating a fiber raw material to obtain a mixture; S2, mixing the mixture with water and stirring uniformly to obtain a slurry; and S3, mixing the slurry with other components uniformly, and then forming, pressing, drying and finishing to obtain the eye protection paper; the paper comprises the following components in parts by weight: 70-90 parts of the fiber raw material, 10-20 parts of a yellow adjusting agent, 3-10 parts of a moisturizing agent, 15-30 parts of a retention aid and 8-15 parts of a filler; the fiber raw material comprises softwood mechanical pulp, softwood pulp and hardwood pulp, and the weight ratio of the softwood mechanical pulp, the softwood pulp and the hardwood pulp is (1.5-2):1:(1.5-2); the retention aid comprises polyetherimide, cationic polyacrylamide and anionic polyacrylamide, and the weight ratio of the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide is (2.5-3.5):1:(1-1.2); in the step S3, the polyetherimide, the cationic polyacrylamide and the anionic polyacrylamide are sequentially added to the slurry and mixed uniformly, and then the other components are added and mixed uniformly; and the filler is calcium carbonate.

2. The production process of anti-myopia paper according to claim 1, characterized in that: The yellow adjusting agent is a yellow microcapsule, and the core material of the yellow microcapsule is a natural beige pigment.

3. The process for producing anti-myopia paper according to claim 2, characterized in that: The wall material of the yellow microcapsule is cationic starch.

4. The process for producing anti-myopia paper according to claim 1, characterized in that: The moisturizing agent is sorbitol.