Eye protection type copy paper and preparation method thereof
By combining a layered structure with specific materials, eye-protecting copy paper solves the problems of reflectivity, color, and physical properties of traditional copy paper, thereby reducing glare, minimizing chemical irritation, improving flexibility and breathability, and protecting eye health.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-08
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional copy paper has shortcomings in terms of reflectivity, color, chemical composition, and physical properties, which can affect eye health and lead to decreased vision and discomfort.
The eye-protecting copy paper uses a layered structure, including a base layer, an eye-protecting functional layer, and a surface treatment layer. It utilizes nano-sized titanium dioxide particles, chitosan, and a micro-uneven structure to reduce reflectivity, minimize color irritation, improve flexibility and breathability, and avoid harmful chemicals.
It effectively reduces glare, relieves eye fatigue, provides a healthy usage environment, improves paper flexibility and breathability, prevents paper from getting damp, extends service life, and protects eye health.
Smart Images
Figure CN121629804A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The patent relates to the technical field of copy paper, and particularly relates to an eye-protecting copy paper and a preparation method thereof. BACKGROUND
[0002] In the current digital era, although electronic devices are widely used, copy paper is still indispensable in office and learning scenarios. However, the traditional copy paper has many problems that are not conducive to eye health, which brings trouble to the long-term user group.
[0003] The surface of the traditional copy paper is smooth, and strong light is easily generated under light irradiation. The light in the office environment or natural light is reflected on the surface of the copy paper, and dazzling glare is often formed, which interferes with the reading line of sight. For example, in some poorly lit offices, the glare on the copy paper can make the eyes quickly tired, and symptoms such as sour and swollen pain occur. Long-term stay in such an environment can easily damage the adjusting function of the eyes, and then cause vision decline. Its color is mostly high-brightness white, which forms a high contrast with the text, and long-time reading can cause the eyes to reduce the ability to distinguish images and decrease visual sensitivity. According to research, long-time reading of the text on the white copy paper can make the eyes feel tired faster, and the reading efficiency is also reduced. Some copy papers add chemical substances such as fluorescent whitening agents in the manufacturing process. These substances can not only migrate to the human skin and cause allergies, but also can be released into the air due to friction and heating during the copying process, and can be inhaled by the human body, affecting the respiratory system and indirectly endangering the eye health. In addition, the traditional copy paper has poor flexibility and air permeability. When flipping, it is easy to make noise, which affects the office and learning atmosphere, makes people feel annoyed, and indirectly affects the eye comfort. Poor air permeability can easily cause the paper to be damp and moldy, breed bacteria, and produce odors, which pose a threat to the health of the contacters, including the eye health.
[0004] In summary, the deficiencies of the traditional copy paper in terms of light reflection, color, chemical substances and physical properties pose potential harm to the eye health of the user, and an eye-protecting copy paper needs to be developed to solve these problems. SUMMARY
[0005] The patent aims to provide an eye-protecting copy paper, which reduces light reflection, reduces color stimulation, avoids harmful chemical substances, and at the same time improves flexibility and air permeability, to provide a comfortable and healthy use experience for the user, effectively protect the eye health, and solve the problem of eye discomfort and potential damage caused by the traditional copy paper.
[0006] In order to achieve the above-mentioned purpose, the patent adopts the following technical solutions: the layered structure of the eye-protecting type copying paper comprises a base layer, an eye-protecting functional layer and a surface treatment layer from inside to outside; the base layer comprises needle leaf wood pulp fibers, broadleaf wood pulp fibers and gardenia yellow pigment, and the mixing ratio of the needle leaf wood pulp fibers and the broadleaf wood pulp fibers is 3:2; the eye-protecting functional layer is respectively covered on the upper and lower surfaces of the base layer and comprises nano-sized titanium dioxide particles and chitosan attached to the fibers; and the surface treatment layer is covered on the outside of the eye-protecting functional layer, has a micro concave-convex structure on the surface and comprises acrylic resin, an antistatic agent and a filler, the mass ratio of the acrylic resin, the antistatic agent and the filler is 7:2:1, the height of the micro concave-convex structure is 3-5 microns and the interval is 8-12 microns.
[0007] Compared with the prior art, the patent has the beneficial effects that: the eye-protecting type copying paper described in the patent effectively makes light diffuse reflection, reduces the light reflection and glare of the paper and relieves eye fatigue through the synergistic effect of the base layer, the eye-protecting functional layer and the surface treatment layer, especially the micro concave-convex structure of the surface treatment layer. The eye-protecting type copying paper reduces the stimulation of high-brightness white color to the eyes through the soft beige color tone, and the eyes are more relaxed during reading, thereby reducing visual fatigue. The eye-protecting type copying paper uses natural plant fibers and environmentally friendly antibacterial materials and does not use harmful chemical substances such as fluorescent whitening agents, thereby ensuring that the paper is non-toxic and harmless and has no harm to human health, creating a healthy office and learning environment for the user and achieving the purpose of environmental protection and health. The base layer fiber with the interlaced structure and the reasonable structural design improve the flexibility and air permeability, which is convenient for browsing, reduces the retention of moisture, prevents the paper from being damp and mildewed, prolongs the service life and reduces the potential threat to eye health. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 It is a schematic diagram of the layered structure of the eye-protecting type copying paper.
[0009] Figure 2 It is a schematic diagram of the interlaced structure of the base layer fiber.
[0010] Figure 3 It is a schematic diagram of the structure of the eye-protecting functional layer.
[0011] Figure 4 It is a schematic diagram of the micro structure of the surface treatment layer.
[0012] BRIEF DESCRIPTION OF DRAWINGS: 1 - base layer, 2 - eye-protecting functional layer, 3 - surface treatment layer, 11 - needle leaf wood pulp fiber, 12 - broadleaf wood pulp fiber, 13 - gardenia yellow pigment, 21 - titanium dioxide particle, 22 - chitosan, 31 - acrylic resin, 32 - antistatic agent, 33 - filler. DETAILED DESCRIPTION
[0013] In order to make the implementation purposes, technical solutions and advantages of the patent more clear, the patent solutions are described in detail in the form of embodiments in combination with the drawings.
[0014] As shown in the accompanying Figures 1-4 The layered structure of the eye-protecting copying paper from inside to outside is base layer 1, eye-protecting functional layer 2 and surface treatment layer 3. The base layer 1 includes needle-leaf wood pulp fibers 11 and broad-leaf wood pulp fibers 12 interwoven with each other and gardenia yellow pigment 13, which serves as the basic support structure of the paper and provides basic strength and toughness; the eye-protecting functional layer 2 is located on the upper and lower surfaces of the base layer and includes nano-sized titanium dioxide particles 21 and chitosan 22 attached to the fibers, which are used to realize the main eye-protecting function; the surface treatment layer 3 is covered on the outside of the eye-protecting functional layer 2 and has a micro concave-convex structure on the surface and includes acrylic resin 31, antistatic agent 32 and filler 33, which are used to optimize the surface of the paper.
[0015] The preparation process of the base layer 1: needle-leaf wood pulp and broad-leaf wood pulp are selected as the natural plant fiber raw material in a ratio of 3:2. The fiber raw material is screened by a vibrating screen to remove impurities. Then the screened fibers are put into a beater to beat for 40 minutes at a speed of 1500 revolutions per minute so that the beating degree reaches 32°SR. The fiber suspension after beating is uniformly distributed on a papermaking net at a flow rate of 0.5 cubic meters per minute by using a wet forming process, and then dehydrated by a vacuum dehydrator at a vacuum degree of-0.08 MPa, and then pressed by a mechanical press at a pressure of 5 MPa to make the fibers interweave to form the base layer, and the basis weight of the base layer is 75 grams per square meter.
[0016] In the preparation process of the base layer 1, 0.2% of gardenia yellow pigment 13 extracted from gardenia fruit is added to the fiber suspension. The extraction process of the gardenia yellow pigment 13 is as follows: after the gardenia fruit is crushed, 5 times the mass of water is added, and then extracted at 80℃ for 2 hours. After filtration and concentration, the gardenia yellow pigment concentrate is obtained, and then added to the fiber suspension, stirred uniformly, and the soft beige tone is adjusted, while the physical properties of the paper are not affected.
[0017] The preparation process of the eye-protecting functional layer 2: nano-sized titanium dioxide particles 21 are prepared and dispersed in deionized water to prepare a suspension with a concentration of 10 grams per liter. At the same time, chitosan 22 is dissolved in a 1% acetic acid solution to prepare a 1% chitosan solution. The base layer is immersed in the nano-sized titanium dioxide suspension at 25℃ for 10 minutes, and the particles are uniformly adsorbed on the surface of the fibers during the process by stirring at a speed of 50 revolutions per minute, and then dried in an oven at 80℃ for 30 minutes to fix. Then, the base layer with adsorbed nano-sized titanium dioxide particles is immersed in the chitosan solution for 15 minutes to make the chitosan adhere to the fibers, and then dried in an oven at 80℃ for 40 minutes to form the eye-protecting functional layer.
[0018] The surface treatment layer 3 preparation process: acrylic resin 31, antistatic agent 32 and filler 33 are weighed according to the mass ratio of 7:2:1, and ethyl acetate with a solid-liquid ratio of 1:5~1:8 is added as a solvent, and then stirred uniformly to prepare a coating liquid. The coating liquid is uniformly coated on the surface of the eye protection functional layer at a speed of 200 meters / minute by using a doctor blade coating process. By adjusting the gap between the doctor blade and the coating roller to 8 microns, the coating amount is controlled, and the coating thickness is 8 microns. After coating, the paper is dried and cured in an oven at 120℃ for 20 minutes, so that the coating surface forms a small concave-convex structure with a height of 3-5 microns and a pitch of 8-12 microns, forming a stable surface treatment layer 3.
[0019] The antistatic agent 32 is a quaternary ammonium salt cationic antistatic agent, such as octadecyl dimethyl benzyl ammonium chloride, which contains long-chain alkyl, quaternary ammonium cation and other parts in its molecular structure; the long-chain alkyl can interact with the organic components on the surface of the paper, enhancing the adhesion of the antistatic agent on the surface of the paper; the quaternary ammonium cation can absorb moisture in the air and form a conductive water film on the surface of the paper, thereby conducting the static electricity on the surface of the paper and playing an antistatic role. The filler 33 is silicon dioxide, which has the characteristics of small particle size, large specific surface area, stable chemical properties, etc.; it is filled between the molecules of acrylic resin 31 and antistatic agent 32, increasing the hardness, wear resistance and scratch resistance of the coating, and also helping to improve the optical properties of the coating, such as better light scattering, further enhancing the matte effect.
[0020] The technical solution described in the patent uses ordinary materials, is suitable for industrial production, and has realizability and practicality.
Claims
1. An eye-protecting type copy paper, characterized by comprising: It comprises, from inside to outside, a base layer (1), an eye-protecting functional layer (2) and a surface treatment layer (3); the base layer (1) comprises needle-leaf wood pulp fibers (11), broad-leaf wood pulp fibers (12) and gardenia yellow pigment (13) interwoven with each other, and the mixing ratio of the needle-leaf wood pulp fibers (11) to the broad-leaf wood pulp fibers (12) is 3:2; the eye-protecting functional layer (2) covers the upper and lower surfaces of the base layer (1) respectively and comprises nano-sized titanium dioxide particles (21) and chitosan (22) adhered to the fibers; the surface treatment layer (3) covers the outside of the eye-protecting functional layer (2) and has a micro concave-convex structure on the surface and comprises acrylic resin (31), antistatic agent (32) and filler (33), and the mass ratio of the acrylic resin (31), the antistatic agent (32) and the filler (33) is 7:2:1, the height of the micro concave-convex structure is 3-5 microns and the interval is 8-12 microns.
2. The eye-protecting type copy paper according to claim 1, wherein: The preparation process of the base layer (1) is as follows: the needle-leaf wood pulp and the broad-leaf wood pulp are mixed, screened and beaten, the beating speed is 1500 rpm, the beating time is 40 minutes and the beating degree reaches 32°SR; the wet forming process is adopted, the flow rate of the fiber suspension is 0.5 cubic meters per minute, vacuum dewatering is carried out at-0.08 MPa and mechanical pressing is carried out at 5 MPa, and the basis weight of the base layer (1) is 75 grams per square meter.
3. The eyestrain relief paper of claim 2, wherein: The extraction process of the gardenia yellow pigment (13) is as follows: the gardenia fruits are crushed, 5 times the mass of water is added, extraction is carried out at 80℃ for 2 hours, the gardenia yellow pigment concentrate is obtained after filtration and concentration, and then the gardenia yellow pigment concentrate is added into the fiber suspension and stirred uniformly; the mass fraction of the gardenia yellow pigment (13) in the fiber suspension is 0.2%.
4. The eye-protecting type copy paper according to claim 1, wherein: The preparation process of the eye-protecting functional layer (2) is as follows: the nano-sized titanium dioxide particles (21) are dispersed in deionized water to form a suspension with a concentration of 10 grams per liter, the chitosan (22) is dissolved in a 1% acetic acid solution to form a chitosan solution with a mass fraction of 1%, the base layer (1) is immersed in the nano-sized titanium dioxide suspension at 25℃ for 10 minutes, the stirring speed is 50 rpm during the process, and then the base layer (1) is dried at 80℃ for 30 minutes to fix; then the base layer (1) is immersed in the chitosan solution for 15 minutes, and then dried at 80℃ for 40 minutes to form.
5. The eye-protecting type copy paper according to claim 1, wherein: The surface treatment layer (3) is prepared by using the doctor blade coating process, the acrylic resin (31), the antistatic agent (32) and the filler (33) are added into the ethyl acetate solvent and stirred uniformly to prepare a coating liquid, the coating liquid is uniformly coated on the surface of the eye-protecting functional layer at a speed of 200 meters per minute, the coating thickness is 8 microns, and then the coating is dried and cured at 120℃ for 20 minutes to form.
6. The eyestrain relief paper of claim 5, wherein: The antistatic agent (32) is a quaternary ammonium salt cationic antistatic agent, and the filler (33) is silicon dioxide.
7. The eyestrain relief paper of claim 6, wherein: The quaternary ammonium salt cationic antistatic agent is octadecyl dimethyl benzyl ammonium chloride.