Optical paper

Abstract

The utility model belongs to the technical field of optical paper, and particularly relates to optical paper which comprises a functional coating on the uppermost layer, a fiber layer in the middle and a bottom layer at the bottom, and the functional coating is formed by mixing fluorescent whitening agent particles and polyether ester amide high-molecular antistatic agents, the fiber layer is formed by mixing and weaving long fibers and short fibers and mixing a layer of high-strength synthetic fibers in the middle; and the bottom layer is formed by arranging a layer of polyethylene foam on the basis of adding silicon dioxide microspheres. The whiteness and the antistatic property are improved through the functional coating, so that printing is more excellent, the fiber layer is reinforced through matching of different fibers and aramid fibers, strength and smoothness are achieved, the bonding layer ensures that the structure is stable, the bottom layer is anti-skid and buffering, and the anti-static anti-static composite film is excellent in performance in the fields of packaging, printing and the like and adapts to diversified requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical paper technical field, concretely is an optical paper. BACKGROUND

[0002] With the continuous progress of science and technology and the increasing demand of people for high-quality printing and packaging materials, optical paper emerges as the times require as a new type of paper material with special optical properties. On the basis of traditional paper, optical paper is carefully designed and improved through each structural layer, aiming to provide better gloss, flatness, antistatic performance and strength and other characteristics to meet the diversified application needs of different fields.

[0003] Traditional paper has many shortcomings. For example, the gloss of ordinary paper is low, and it is difficult to present bright and lively color effects, and when printing high-quality images and text materials, it often cannot achieve satisfactory visual effects. In addition, traditional paper is prone to static electricity, which not only causes the paper to attract dust during production and use, affecting the cleanliness and appearance quality of the paper, but also may cause damage to some precision printing equipment and electronic equipment. In terms of strength, traditional paper is also difficult to meet the requirements of some special application scenarios, such as heavy product packaging, frequent folding or bearing large external force, etc. SUMMARY

[0004] (I) Technical problem solved

[0005] In view of the shortcomings of the prior art, the utility model provides an optical paper, which solves the problems raised in the background.

[0006] (II) Technical scheme

[0007] The utility model discloses a kind of optical papers to realize the above-mentioned purposes specifically using the following technical scheme:

[0008] An optical paper, including the functional coating of uppermost layer, the fiber layer in the middle and the bottom layer of bottom, the functional coating is mixed into nano fluorescent whitening agent microparticle and polyether ester amide high molecular antistatic agent mixed and formed;

[0009] The fiber layer is long fiber and short fiber mixed weaving middle mixed layer of high-strength synthetic fiber;

[0010] The bottom layer is added with silica microspheres as base and set with a layer of polyethylene foam.

[0011] Further, the long fiber is conifer pulp fiber.

[0012] Further, the short fiber is broadleaf wood pulp fiber.

[0013] Further, the high-strength synthetic fiber is aramid fiber.

[0014] Further, the mixing ratio of long fibers and short fibers in the fiber layer is 7:3; 8:2; 4:6 or 3:7.

[0015] Further, a bonding layer is added between the fiber layer and the bottom layer, which can adopt environment-friendly glue or hot melt adhesive film.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the optical paper provided by the present application has the following beneficial effects:

[0018] The present application, the fluorescent whitening agent particles in the functional coating make the paper whiter and brighter, enhance the reflection of light, improve the visual effect of printed matter, reduce static electricity accumulation, avoid adsorbing dust and damaging equipment, for example, when printing high-quality images and graphic materials, the colors are more vivid and lively;

[0019] The present application, the long fibers of the fiber layer provide strength, the short fibers improve the surface, and the aramid fibers further enhance the strength, different proportions adapt to various needs, and the bonding layer ensures that the layers are tightly combined, such as making packaging cartons to better protect the goods, which are not easy to be damaged during long-term use or stress;

[0020] The present application, the silica microspheres of the bottom layer prevent slipping, and the polyethylene foam cushions external impact, which can prevent paper from slipping and protect products from vibration and collision during packaging and use, and is suitable for packaging various products to improve safety and stability. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The present application is a three-dimensional structure schematic diagram;

[0022] Figure 2 The present application is a cross-sectional structure schematic diagram.

[0023] In the figure: 1, functional coating; 2, fiber layer; 3, bottom layer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] EMBODIMENT

[0026] AsFigures 1-2 The utility model discloses an optical paper, including the functional coating 1 of the uppermost layer, the fiber layer 2 of the middle and the bottom layer 3 of the bottom, the functional coating 1 is mixed into the fluorescent whitening agent microparticle of nanometer level and the polyether ester amide macromolecule antistatic agent mixed and formed;

[0027] The fiber layer 2 is mixed weaving long fiber and short fiber and mixes a layer of high-strength synthetic fiber in the middle;

[0028] The bottom layer 3 is added silica microspheres as the base and sets up a layer of polyethylene foam;

[0029] The functional coating 1 mixes the fluorescent whitening agent microparticle of nanometer level and the polyether ester amide macromolecule antistatic agent.

[0030] The fluorescent whitening agent microparticle of nanometer level can improve the whiteness and brightness of paper, making the paper more white and eye-catching in vision, thereby enhancing the reflection effect of the paper on light, which is beneficial to present more bright and vivid colors, especially suitable for high-quality printing, such as magazine covers, product brochures, etc., which can improve the visual effect of printed matter.

[0031] The polyether ester amide macromolecule antistatic agent can effectively reduce the static accumulation on the surface of the paper. In the production, transportation and use of paper, static electricity is easy to attract dust, affecting the cleanliness and appearance quality of the paper. The addition of antistatic agent can avoid this situation. At the same time, for some applications involving electronic equipment or sensitive to static electricity, such as paper in electronic equipment packaging, the antistatic performance can prevent static electricity from damaging electronic equipment, improving the safety and stability of paper use.

[0032] The fiber layer 2 is mixed weaving long fiber and short fiber and mixes a layer of high-strength synthetic fiber in the middle. The mixing ratio of long fiber and short fiber has 7:3, 8:2, 4:6 or 3:7 and many other choices, which can be adjusted according to different needs.

[0033] The long fiber has a longer fiber length, which can provide higher strength and toughness to the paper, so that the paper is not easy to break when subjected to external force, and is suitable for applications with high strength requirements, such as large poster paper, heavy product packaging paper, etc., to ensure that the paper can remain intact during use and is not easy to damage.

[0034] The short fiber is short, which helps to fill the gap between long fibers, making the surface of the paper more smooth and smooth. This is very important for printing, as a smooth surface can make ink adhere better, and the printed patterns and characters are clearer and more delicate, thereby improving the printing quality, which is suitable for various high-quality printed matter, such as book pages, art albums, etc.

[0035] The middle aramid fiber layer, as a high-strength synthetic fiber, further significantly enhances the overall strength of the paper. Aramid fibers have extremely high strength and modulus, effectively preventing the paper from tearing or deforming when subjected to significant external impacts or heavy objects, greatly improving the paper's durability and reliability. For example, it can better protect the contents of packaging boxes that require frequent handling or may be subject to collisions.

[0036] The bottom layer 3 is based on silica microspheres, and then a layer of polyethylene foam is added.

[0037] The addition of silica microspheres gives the bottom layer a certain roughness, thereby increasing the friction between the paper and the contact surface and playing a role in preventing slippage. When stacking paper or packaging items, the anti-slip property can prevent the paper from slipping, keep the paper neatly arranged, and reduce the risk of damage caused by slippage. It is especially suitable for paper products that need to be stacked stably, such as paper stored in warehouses or multi-layer packaging materials.

[0038] The polyethylene foam layer provides excellent cushioning. When optical paper is used to package products such as electronics and fragile items, the foam layer absorbs and disperses external impacts, effectively protecting the product from vibration and collision damage. At the same time, the foam layer can also increase the three-dimensionality of the paper packaging, making it more aesthetically pleasing and providing a certain degree of protection, thus enhancing the overall packaging effect.

[0039] The bonding layer uses environmentally friendly adhesives or hot melt adhesive films as bonding materials.

[0040] The presence of the adhesive layer enhances the bonding force between the fiber layer and the underlying layer, ensuring a tight connection between the paper layers. During the use of the paper, especially when subjected to external forces or environmental changes, the adhesive layer prevents the underlying layer from separating from the fiber layer, maintaining the integrity and stability of the paper, improving its durability, extending its service life, and enabling the paper to maintain good performance in various application scenarios.

[0041] like Figure 1 As shown, in some embodiments, the long fibers are softwood pulp fibers; softwood pulp fibers typically have a relatively long fiber length, generally between 2 and 5 millimeters. This longer fiber morphology allows them to form a more continuous and robust fiber network in the paper structure. For example, during paper forming, the long fibers intertwine and entwine to form a skeleton-like structure, providing strong support for the paper and thus significantly improving its tensile strength. Compared to short fibers, the long fiber characteristics of softwood pulp fibers enable them to better withstand tensile and tearing forces, making the paper less prone to breakage during use.

[0042] The thick cell walls of softwood pulp fibers give them high strength and toughness. When optical paper is subjected to external forces, such as folding, squeezing, or friction during packaging or handling, the thick-walled fibers can effectively resist deformation and damage. For example, when making large posters, the paper needs to remain flat and intact during hanging and display; the high strength of softwood pulp fibers ensures that the posters will not tear or deform even after prolonged use.

[0043] like Figure 1 As shown, in some embodiments, the short fibers are hardwood pulp fibers; hardwood pulp fibers are relatively short, typically between 0.5 and 1.5 mm in length. The shorter fiber length allows them to be packed more tightly within the paper, filling the gaps between longer fibers. For example, during paper forming, hardwood pulp fibers can, like fine sand filling the gaps between stones, make the paper's microstructure denser, thereby improving its smoothness. Compared to long fibers, hardwood pulp fibers result in a finer paper surface, reducing surface roughness, which is crucial for high-quality printing.

[0044] The cell walls of wood fibers are relatively thin, and the surface is relatively soft. This characteristic allows the wood pulp fibers to form a relatively soft coating layer on the paper surface, which helps improve the paper's flexibility. During paper processing and use, such as folding and rolling, the soft fiber layer can reduce the risk of cracking or breaking, making the paper more manageable.

[0045] like Figure 2 As shown, in some embodiments, the high-strength synthetic fiber is composed of aramid fiber; aramid fiber has extremely high tensile strength, much higher than that of ordinary organic and inorganic fibers. For example, the tensile strength of aramid fiber can reach 3-5 GPa, several times higher than that of ordinary polyester fiber. This high-strength characteristic allows the paper to withstand greater tensile forces without easily breaking after incorporating aramid fiber into the fiber layer. In optical paper applications, such as the production of large outdoor advertising posters or promotional materials that require frequent hanging displays, the paper needs sufficient strength to resist external forces such as wind and its own weight. The high strength of aramid fiber ensures that the paper remains intact under these conditions, without tearing or breaking.

[0046] Meanwhile, aramid fibers also possess high modulus, typically ranging from 60 to 120 GPa. High modulus means the fiber deforms very little under stress, exhibiting excellent rigidity. When paper is subjected to pressure or bending, aramid fibers can maintain their shape, effectively preventing excessive deformation. For example, in the manufacture of packaging boxes for optical instruments, the paper needs to maintain a certain shape and structural stability; the high modulus properties of aramid fibers can meet this requirement, protecting the internal instruments from damage caused by external pressure.

[0047] As Figure 2 shown, in some embodiments, the mixing ratio of long fibers and short fibers in the fiber layer 2 is 7:3; 8:2; 4:6 or 3:7;

[0048] 7:3 ratio

[0049] Strength advantage: When the ratio of long fiber softwood pulp fibers and short fiber hardwood pulp fibers is 7:3, the paper has higher strength. Long fibers dominate at this ratio, forming a relatively strong fiber network structure, providing strong tensile and tear resistance to the paper. For example, when making large posters or packaging paper that needs to bear certain external forces, this ratio of fiber layer can ensure that the paper is not easily damaged when hanging, handling or slightly colliding, maintaining the integrity of the form.

[0050] 8:2 ratio

[0051] High-strength applications: The content of long fibers is further increased at this ratio, further improving the strength of the paper. Suitable for special application scenarios with extremely high strength requirements, such as making packaging paper for heavy machinery products, which needs to bear large weight and friction; or for making posters that need to be displayed outdoors for a long time and may be affected by harsh weather conditions, such as billboards on the sea or areas with more sand. In these cases, the 8:2 ratio of the fiber layer can provide excellent damage resistance to ensure that the paper maintains its structure during long-term use.

[0052] 4:6 ratio

[0053] Balanced performance: The 4:6 ratio achieves a good balance between strength and smoothness. Long fibers provide sufficient strength support, enabling the paper to have certain resistance to external forces, suitable for common printing and packaging applications. For example, it performs well in making ordinary book covers, brochures, and packaging boxes for general electronic products. The paper can withstand certain external forces during folding, reading and handling, and also ensures good printing quality.

[0054] 3:7 ratio

[0055] Surface optimization: When the ratio of long fibers and short fibers is 3:7, the surface smoothness of the paper reaches a high level. The large number of short fibers makes the paper surface almost free of obvious fiber texture, presenting a very delicate texture. This is extremely beneficial for application scenarios that require high-precision printing, such as high-end art albums, limited edition photography prints, and high-quality brand promotional posters, which can maximize the reproduction of image details and subtle color changes, making the printed product have extremely high artistic value and visual impact.

[0056] As Figure 2As shown, in some embodiments, a layer of adhesive layer is added between the fiber layer 2 and the bottom layer 3, which can be an environmentally friendly glue or hot melt adhesive film; the environmentally friendly glue or hot melt adhesive film can fill the small uneven places on the surface of the fiber layer 2 and the bottom layer 3 after curing, forming an effect similar to "anchoring". The molecules of the glue or adhesive film penetrate into the fiber gap of the fiber layer and the pores of the polyethylene foam and silica microspheres of the bottom layer, and when cured, small cement "hooks" are formed in these pores, tightly connecting the two layers together. This mechanical bonding greatly increases the friction and adhesion between the fiber layer and the bottom layer, preventing the two layers from easily separating when subjected to external forces. For example, when the paper is subjected to bending, folding or stretching operations, the adhesive layer can ensure that the fiber layer and the bottom layer remain integral and do not separate, thereby ensuring the structural integrity and performance of the paper.

[0057] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An optical paper comprising an uppermost functional coating (1), an intermediate fibrous layer (2) and a bottom base layer (3), characterized in that: The functional coating (1) is mixed into nano-sized fluorescent whitening agent particles and polyether ester amide macromolecular antistatic agent; The fiber layer (2) is composed of long fibers and short fibers mixed and woven with a layer of high-strength synthetic fibers in the middle. The bottom layer (3) is composed of a layer of polyethylene foam with silica microspheres added as the base.

2. An optical paper according to claim 1, characterized in that: The long fibers are conifer pulp fibers.

3. An optical paper according to claim 1, characterized in that: The short fibers are broadleaf wood pulp fibers.

4. An optical paper according to claim 1, characterized in that: The high-strength synthetic fiber composition is aramid fiber.

5. An optical paper according to claim 1, characterized in that: The mixing ratio of long fibers and short fibers in the fiber layer (2) is 7:3; 8:2; 4:6 or 3:

7.

6. An optical paper according to claim 1, characterized in that: A bonding layer is added between the fiber layer (2) and the bottom layer (3), which can use environmentally friendly glue or hot melt adhesive film.

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