High-wet-strength nano silk paper

Abstract

The utility model belongs to the technical field of silk paper, and particularly relates to high-wet-strength nanometer silk paper which comprises a base material layer, and the base material layer is of a basic network structure of the paper formed by interweaving hemp fibers or straw fibers and plant fibers. A polymer coating is coated on the base material layer, and a colloid substrate layer is arranged at the bottom of the base material layer. According to the utility model, the base material layer is interwoven with hemp or straw fibers to form a tough network, so that the paper is endowed with basic strength and environmental protection property, the thickness of the polymer coating can be flexibly adjusted, water is blocked and products are protected during moistureproof packaging, the paper is protected by thin coating in the field of painting and calligraphy, creation is facilitated, the colloid substrate layer is stably attached to the paper, displacement is prevented, and the colloid is selected according to scenes to meet various requirements; the application performance in multiple industries is excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of silk paper, specifically to a high wet strength nanometer silk paper. BACKGROUND

[0002] With the continuous progress of science and technology and the rapid development of various industries, the performance requirements of paper are becoming higher and higher. Traditional paper usually takes wood fiber as the main raw material, and has certain limitations in strength, wet strength, functionality, etc. In many application scenarios, such as high-end packaging, culture and art, medical field, etc., the paper needs to have higher strength, better wet strength, specific functionality and environmental protection characteristics.

[0003] In some special environments, the paper needs to have good wet strength. For example, in humid climate conditions, the paper is easy to get wet and soft, even broken, affecting its performance. In the field of food packaging, medical product packaging, etc., the wet strength of paper is required to be higher to ensure the safety of products during storage and transportation. In addition, for some applications that need to contact with water or moisture, such as painting backing paper, medical dressing, etc., high wet strength paper can better meet the needs.

[0004] With the continuous improvement of people's environmental protection consciousness, the demand for environmental protection materials is also increasing. As renewable resources, hemp fibers and straw fibers have the advantages of wide source, low cost and biodegradability, which meet the trend of environmental protection development. At the same time, finding environmentally friendly coating and substrate materials to replace traditional chemical materials is also an important direction of current paper technology development. CONTENT OF THE UTILITY MODEL

[0005] (I) technical problems solved

[0006] In view of the shortcomings of the prior art, the utility model provides a high wet strength nanometer silk paper, which solves the problems proposed in the above background art.

[0007] (II) technical scheme

[0008] The utility model discloses a high wet strength nanometer silk paper to realize the following technical scheme in order to realize the above-mentioned purpose:

[0009] A high wet strength nanometer silk paper, comprising a substrate layer, the substrate layer is hemp fiber or straw fiber, and the plant fibers are interwoven to form the basic network structure of the paper.

[0010] A layer of polymer coating is coated on the top of the substrate layer, and a gum base layer is arranged at the bottom of the substrate layer.

[0011] Further, the polymer coating is a polyvinyl alcohol coating or a polyvinyl alcohol coating.

[0012] Further, the gum base layer is gum arabic, gelatin or polyvinyl butyral.

[0013] Further, the thickness of the polymer coating layer can be adjusted within a certain range to meet the requirements of different application scenarios for paper performance, and the coating layer thickness ranges from 0.1 mm to 1 mm.

[0014] (III) beneficial effects

[0015] Compared with the prior art, the high-wet-strength nanometer silk paper has the following beneficial effects:

[0016] The base material layer is interwoven with hemp or straw fibers to form a strong network, giving the paper basic strength and environmental protection, the polymer coating layer can be flexibly thickened, the water resistance protects the product during moisture-proof packaging, the thin coating of the paper in the field of calligraphy and painting helps creation, the gum base layer stably pastes the paper, prevents displacement, and meets multiple requirements by selecting glue according to the scene, and performs well in multiple industries. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses a structure schematic diagram;

[0018] Figure 2 The utility model discloses a base material layer structure schematic diagram.

[0019] In the drawing: 1, base material layer;2, polymer coating layer;3, gum base layer. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] EMBODIMENT

[0022] As Figures 1-2 shown, an embodiment of the utility model provides a high-wet-strength nanometer silk paper, which comprises a base material layer 1, the base material layer 1 is hemp fiber or straw fiber, and plant fibers are interwoven to form the basic network structure of paper;

[0023] A polymer coating layer 2 is coated on the base material layer 1, and the bottom of the base material layer 1 is provided with a gum base layer 3.

[0024] The base material layer 1 uses hemp fibers or straw fibers, and the plant fibers are interwoven to form a basic network structure of paper. Hemp fibers have the characteristics of high strength and good toughness, and straw fibers are widely available and low in cost and biodegradable. The mixture of the two is interwoven to make the paper have good initial strength and environmental protection properties, lay the foundation for the overall performance of the paper, provide a support framework, determine the basic mechanical properties and dimensional stability of the paper, and is the key structure for bearing other functional layers.

[0025] The polymer coating layer 2 is a polyvinyl alcohol coating or a polyvinyl alcohol coating, and the thickness can be adjusted within the range of 0.1 mm to 1 mm. Polyvinyl alcohol has good film-forming property, flexibility and hydrophilicity, which can improve the surface properties of paper. Adjusting the thickness can adapt to different scenarios, such as thicker coating to enhance water resistance and wear resistance for packaging, and thin coating to maintain air permeability and flexibility of paper to meet the needs of painting backing paper, improve the surface quality of paper, and enhance the protection and functional adaptability.

[0026] The gum base layer 3 selects Arabic gum, gelatin or polyvinyl butyral. Arabic gum and gelatin are natural and environmentally friendly, have moderate adhesion and good biocompatibility, and polyvinyl butyral has strong adhesion and good water resistance. This layer provides adhesion to the bottom of the paper to ensure good adhesion to the contact surface, prevent the paper from sliding and shifting during use, maintain structural integrity, and expand the application range of the paper by selecting different gums to adjust the adhesion according to the use environment.

[0027] In the high-wet-strength nanometer silk paper, the hemp fibers or straw fibers of the base material layer 1 are interwoven into a tight network structure, building a stable support framework and giving the paper basic strength and shape stability. The fiber characteristics determine the basic performance of the paper, laying the foundation for subsequent functional realization. The polymer coating layer 2 forms a continuous protective film with the characteristics of polyvinyl alcohol, and the thickness is adjusted to optimize protection and functional adaptation. Thick coating strengthens water resistance, wear resistance, etc., relying on its own barrier and film-forming properties to resist water and friction in the packaging field; thin coating maintains air permeability and flexibility to meet the needs of painting backing paper, and precise adjustment realizes performance balance. The gum base layer 3 uses Arabic gum, gelatin or polyvinyl butyral adhesion to strongly adhere to the contact surface, and from the bottom to stabilize the paper structure. Through the action of the molecular forces between the gum and the contact material, the paper is prevented from shifting and loosening, ensuring the structural integrity during use. Different gums adjust the adhesion according to the environment to optimize the adhesion effect in scenarios such as labels and decorative paper. The structures work together to make the paper perform excellently in multiple fields and reliably in functions.

[0028] As shown in Figure 1, in some embodiments, the polymer coating 2 is a polyvinyl alcohol (PVA) coating or a polyvinyl alcohol coating; the use of a PVA coating for the polymer coating 2 offers significant advantages. PVA has excellent film-forming properties, enabling it to uniformly cover the surface of the substrate layer 1, forming a continuous and dense protective film. This characteristic effectively improves the smoothness of the paper surface, reduces surface roughness and porosity, lowers the paper's permeability to liquids and gases, and enhances the paper's waterproof and barrier properties.

[0029] Its excellent flexibility gives the paper better foldability and bending resistance. During multiple folding or bending processes, the coating can deform with the paper without breaking or peeling off, so that the paper can maintain structural integrity and stable performance in scenarios that require frequent bending, such as packaging and book making.

[0030] Furthermore, polyvinyl alcohol (PVA) molecules contain a large number of hydroxyl groups, exhibiting hydrophilicity and a certain degree of water retention, playing a crucial role in specific applications. For paper applications requiring precise moisture control, such as packaging for humidity-sensitive products or art paper, it can accurately regulate the paper's moisture content, preventing excessive dryness and brittleness or excessive moisture and limpness, thus ensuring product quality and artistic expression.

[0031] like Figure 1 As shown, in some embodiments, the adhesive base layer 3 is gum arabic, gelatin, or polyvinyl butyral; each of the gum arabic, gelatin, or polyvinyl butyral used in the adhesive base layer 3 has unique properties and functions. Gum arabic, as a natural plant gum, is mainly composed of polysaccharides, possessing excellent adhesion and good solubility, and can form a strong and stable adhesive layer on the bottom of the paper. In applications where moderate adhesion is required and environmental protection and natural material properties are emphasized, such as food label paper or art paper, gum arabic can ensure that the paper adheres tightly to the target surface, preventing displacement or detachment during handling and display. Furthermore, its natural origin makes it suitable for environments with stringent environmental requirements.

[0032] Gelatin, derived from the hydrolysis of animal collagen, exhibits excellent biocompatibility, strong adhesion, and good film-forming properties. In applications with extremely high biosafety requirements, such as medical packaging paper or biological testing strips, a gelatin base ensures a stable bond between the paper and biological samples or medical products, preventing sample contamination or product damage due to accidental peeling. In aqueous solutions, it forms a stable colloidal system, which, after drying, forms a tough, transparent film, providing reliable structural support and adhesiveness to the paper substrate, helping to maintain the overall physical integrity and functional stability of the paper.

[0033] Polyvinyl butyral is a synthetic polymer glue with excellent water resistance, chemical corrosion resistance and high transparency. In outdoor advertising paper, waterproof label or industrial packaging paper in humid environment, its strong water resistance can effectively resist rain and moisture erosion, ensuring that the paper remains firmly adhered and structurally stable under harsh humidity conditions. Chemical stability allows it to withstand contact with various chemicals without deteriorating or losing adhesion, expanding the paper's application range in chemical product packaging, special environment labeling and other fields, providing durable and reliable bottom adhesion and protection performance.

[0034] As shown in Figure 1 In some embodiments, the thickness of the polymer coating 2 can be adjusted within a certain range to meet the performance requirements of paper in different application scenarios. The coating thickness ranges from 0.1 mm to 1 mm. The thickness of the polymer coating 2 can be flexibly adjusted within the range of 0.1 mm to 1 mm to precisely adapt to various application scenarios of high wet strength nanometer silk paper. When the paper is used in packaging fields such as food and electronic devices that require strict moisture protection, the coating thickness can be appropriately increased to nearly 1 mm. With the density and barrier properties of polyvinyl coating, a strong moisture barrier can be built to significantly reduce the rate of external moisture intrusion into the paper, effectively avoiding the risk of product quality deterioration due to moisture, and effectively extending the product storage period and shelf life.

[0035] In the cultural and artistic categories of calligraphy and painting creation, ancient book restoration, etc., the coating thickness is adjusted to about 0.1 mm. This thickness can optimize the smoothness and fineness of the paper surface, provide a high-quality carrier for calligraphy and painting, and maximize the breathability and flexibility of the paper itself. This ensures that the paper will not mold due to internal moisture accumulation or be damaged due to rigidity during long-term storage and frequent reading, providing protection for cultural and artistic treasures.

[0036] In the case of label stickers, decorative wallpaper and other conventional applications, the coating thickness can be precisely selected within the range of 0.1 mm to 1 mm according to the specific use environment and functional requirements. For example, indoor decorative wallpaper for short-term use can appropriately reduce the thickness to balance decoration and economy. Outdoor long-term label stickers can appropriately increase the thickness to improve weather resistance and adhesion, allowing the paper to perform optimally in various scenarios and expand its application scope and depth.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A high wet strength nanometer silk paper, comprising a substrate layer (1), characterized in that: The base material layer (1) is hemp fiber or straw fiber, and the plant fibers are interwoven to form the basic network structure of the paper; A polymer coating layer (2) is coated on the base material layer (1), and the bottom of the base material layer (1) is provided with a gum base layer (3). 2.The high wet-strength nanometer silkworm silk paper according to claim 1, characterized in that: The polymer coating layer (2) is a polyvinyl alcohol coating layer or a polyvinyl alcohol coating layer. 3.The high wet-strength nanometer silkworm silk paper according to claim 1, characterized in that: The gum base layer (3) is gum arabic, gelatin or polyvinyl butyral. 4.The high wet-strength nanometer silkworm silk paper according to claim 1, characterized in that: The thickness of the polymer coating layer (2) can be adjusted within a certain range to meet the performance requirements of paper in different application scenarios, and the coating thickness ranges from 0.1 mm to 1 mm.

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