An embossed tissue paper with an embossed pattern that improves the absorbency, softness, and strength of tissue paper.

Abstract

This invention belongs to the field of household goods technology and discloses an embossed household paper with embossed patterns that improve the absorbency, softness, and strength of the paper. The household paper includes a base layer, a first embossed surface, and a second embossed surface. The first embossed surface, the base layer, and the second embossed surface are connected vertically from top to bottom, and both are arranged horizontally. The first embossed surface includes a first base layer, multiple first embossed units, and broken-line embossing. This invention's embossed household paper features a first embossed pattern group and a second embossed pattern. The first and second embossed patterns improve the feel and absorbency of the paper. The sinusoidal embossing allows liquid to be preferentially transported along the linear embossed area, increasing the absorption rate and improving the user experience of the household paper.

Description

Technical Field

[0001] This invention belongs to the field of daily necessities technology, and in particular to an embossed tissue paper with an embossed pattern that improves the absorbency, softness and strength of tissue paper. Background Technology

[0002] With economic development and improved living standards, consumers are increasingly pursuing a higher quality of life, a trend particularly evident in the household paper industry. Household paper products, including but not limited to toilet paper, facial tissues, and napkins, have seen their three key quality indicators—absorbency, softness, and strength—become crucial factors for consumers when choosing products. Patent publication (CN110318298B) discloses a multi-layer kitchen paper containing a composite sizing solution. This multi-layer kitchen paper includes an upper and lower base paper layer, which is bonded together by a sizing layer (containing a composite sizing solution: such as anionic rosin sizing agent, cationic starch sizing agent, cationic waterborne polyurethane-acrylate, sizing reinforcing agent, and water). The sizing reinforcing agent mainly includes a mixture of non-fluorinated ethyl-substituted pyridine compounds, polysorbate, carboxymethyl cellulose, etc. Some of the chemical agents used in this patent publication are toxic and harmful to human health or the environment. Patent publication (CN110565427A) discloses a high-antibacterial, unbleached bamboo fiber kitchen paper and its preparation method. This patent mainly involves a method for obtaining bamboo pulp fiber from bamboo strips, and then discloses that using this fiber to prepare kitchen paper can effectively improve its antibacterial properties. However, it has little to do with the embossing process and multi-layer structure improving the absorbency of the kitchen paper. Patent publication (CN109914155A) discloses a kitchen paper and its preparation method. This patent mainly involves a papermaking process using the residue of a traditional Chinese medicine formula, disclosing processes including pretreatment, pulping, extraction of medicinal components from the filtrate, and paper modification. It also utilizes a bulking process and freeze-drying and hot-air drying to improve the bulk, softness, and antibacterial properties of the kitchen paper. However, this patent does not address the impact of embossing and multi-layer processes on the absorbency of the kitchen paper. While traditional embossing processes improve the appearance and feel of the paper, they may, to some extent, sacrifice absorbency and strength. For example, overly dense embossing can cause the fibers between paper layers to become too tightly packed, restricting the diffusion of moisture and thus reducing the paper's softness. At the same time, this tight structure may also slow down the diffusion of liquid within the paper, affecting its absorbency. Furthermore, the paper is prone to tearing after absorbing water, which not only affects the user experience but also reflects insufficient paper strength.

[0003] To address these issues, this invention proposes a novel embossing process designed to enhance the absorbency and softness of paper by improving the embossing pattern and layer structure, while maintaining or increasing its strength. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide an embossed household paper with an improved absorbency, softness and strength.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An embossed tissue paper with an embossed pattern that improves the absorbency, softness and strength of tissue paper, the tissue paper includes a base body, a first embossed surface and a second embossed surface, the first embossed surface, the base body and the second embossed surface are connected in sequence from top to bottom in the vertical direction, and the first embossed surface, the base body and the second embossed surface are both arranged in the horizontal direction.

[0007] The body base layer is set to at least one layer, and two or more body base layers are connected together from top to bottom;

[0008] The first embossed surface includes a first base layer, multiple first embossed units, and broken-line embossing. The first base layer is arranged in a horizontal direction, and the first embossed units and broken-line embossing are both arranged on the upper surface of the first base layer. The first embossed units and broken-line embossing are both arranged in a longitudinal direction. Multiple first embossed units are evenly distributed and spaced apart in a horizontal direction. Broken-line embossing is arranged between two adjacent first embossed units. The longitudinal center of the broken-line embossing is equal to the horizontal distance between two adjacent first embossed units.

[0009] The broken-line embossing includes multiple linear embossings, which are evenly distributed and spaced apart along the longitudinal direction;

[0010] The first embossing unit includes a first embossing pattern group and a second embossing pattern. Both the first embossing pattern group and the second embossing pattern are arranged longitudinally. The second embossing pattern includes two sinusoidal embossing patterns symmetrically arranged in the horizontal direction. The first embossing pattern group is arranged between the two sinusoidal embossing patterns. The longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal embossing patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas.

[0011] The first embossed pattern group includes multiple first embossed patterns, which are evenly distributed and spaced apart along the longitudinal direction. Each first embossed pattern includes multiple dot-shaped embossing patterns distributed in a circumferential array.

[0012] Furthermore, the linear embossing and sinusoidal linear embossing are both recessed downwards from the upper surface of the first base layer, and are recessed downwards within the main body base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed into a groove shape.

[0013] Furthermore, the linear embossing and sinusoidal linear embossing can be presented as dot-shaped or linear indentations on the first base layer. When the aspect ratio of the linear embossing is less than or equal to 5, it is presented as dot-shaped indentations; when the aspect ratio of the linear embossing is greater than or equal to 5, it is presented as linear indentations.

[0014] Furthermore, the area of ​​the first embossed pattern is 0.3-8 cm². 2 The area of ​​the second embossed pattern is 0.1-2 cm². 2 The area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern; the area of ​​the first indentation formed by the first and second embossed patterns is 0.5-6mm. 2 The spacing between the first embossed pattern and the first embossed pattern forming the first indentation is 0.5-3mm.

[0015] Furthermore, the area of ​​the second embossed pattern is smaller than the area of ​​the first embossed pattern;

[0016] Alternatively, the arrangement of the first embossing units on the first embossing surface can be continuous or discontinuous and independent.

[0017] Furthermore, the paper edge line of the body base layer intersects with at least one first embossing unit;

[0018] Alternatively, the sum of the areas of the first embossed pattern, the second embossed pattern, and the linear embossed pattern is less than or equal to 70% of the area of ​​the first embossed unit.

[0019] Furthermore, the second embossed surface includes a second base layer and a plurality of second embossed units. The plurality of second embossed units are evenly distributed and spaced apart. The second base layer is connected to each other on the lower surface of the main body base layer. The second embossed units are connected to each other on the lower surface of the second base layer. The second embossed unit includes a plurality of dot-shaped embossing. The plurality of dot-shaped embossing forms a second indentation on the second embossed surface. The second indentation is raised upward from the lower surface of the second base layer and is raised upward within the main body base layer. The longitudinal section of the second indentation is a hollow and upwardly raised groove.

[0020] Furthermore, the second indentation is arranged in an array on the second embossed surface.

[0021] Furthermore, the height of the sinusoidal embossing of the first embossed pattern is 0.8–1.2 mm, and the distance between two sinusoidal embossed patterns is 0.5–0.8 mm;

[0022] Alternatively, the height of the linear embossing is 0.8–1.2 mm, and the diameter of the linear embossing is 0.5–0.8 mm.

[0023] Alternatively, the density of all dot-shaped embossing on both the first and second embossed surfaces is 20–50 dots / cm². 2 The height of the dotted embossing is 0.8-1.0 mm.

[0024] Alternatively, all the dot-shaped embossing on the first and second embossed surfaces are frustum-shaped protrusions, and the top of the frustum-shaped embossed surface is provided with rounded corners.

[0025] Furthermore, the bottom diameter of the dot-shaped embossed frustum is 0.5–1.2 mm, the top diameter of the frustum is 0.4–1.0 mm, and the radius of the rounded corner at the top of the frustum is 0.1–0.5 mm.

[0026] The advantages and positive effects of this invention are as follows:

[0027] 1. The embossed tissue paper of the present invention is provided with a first embossed pattern group and a second embossed pattern. The first embossed pattern and the second embossed pattern improve the touch and water and oil absorption performance of the tissue paper. The sinusoidal embossing can make the liquid preferentially transported along the linear embossed area, improve the water absorption rate, and improve the user experience of the tissue paper.

[0028] 2. The design of the embossing pattern and depth in this invention enhances the paper's softness while ensuring strength. The multi-layer body base structure and optimized embossing design effectively improve the paper's longitudinal and transverse tensile indices, as well as its wet tensile index, ensuring that the paper is not easily torn during use and maintains stable strength performance.

[0029] 3. This invention increases the porosity and surface area of ​​the paper through linear and dot-like embossing designs, thereby improving water absorption and enabling the paper to quickly absorb and diffuse liquids. Linear embossing not only beautifies the paper surface but also guides the liquid to diffuse rapidly along linear areas. The tiny recessed areas created by dot-like embossing provide ample water storage space for the liquid, further enhancing the paper's water absorption and moisture absorption efficiency.

[0030] 4. The different area designs of the first and second embossed patterns in this invention, as well as the combination of linear and dotted embossing, achieve the best balance between tactile feel and water retention performance, and avoid paper hardening caused by excessive embossing.

[0031] 5. The embossing pattern of the present invention effectively improves the absorbency, softness and strength of tissue paper, meeting diverse application needs. Attached Figure Description

[0032] Figure 1 This is a top view schematic diagram of a structural connection of the first embossed surface of the embossed tissue paper in this invention;

[0033] Figure 2This is a bottom view schematic diagram of the second embossed surface of the embossed household paper in this invention;

[0034] Figure 3 for Figure 1 Front view of the structural connection in the AA direction. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0036] Unless otherwise specified, all raw materials used in this invention are commercially available products. Unless otherwise specified, all methods used in this invention are conventional methods in the field. All substances used in this invention are of conventional mass. Structures, connections, etc., not described in detail in this invention can be understood as conventional techniques in the field.

[0037] An embossed tissue paper with an embossed pattern that improves the absorbency, softness, and strength of tissue paper, such as... Figures 1 to 3 As shown, the household paper 100 includes a body base layer 102, a first embossed surface 1001 and a second embossed surface 1002. The first embossed surface, the body base layer and the second embossed surface are connected in sequence from top to bottom in the vertical direction. The first embossed surface, the body base layer and the second embossed surface are both arranged in the horizontal direction.

[0038] The body base layer is at least one layer, and two or more body base layers are connected together from top to bottom; the body base layer improves the bulk and strength of the tissue paper of the present invention.

[0039] The first embossed surface includes a first base layer 101, multiple first embossing units 1003, and broken-line embossing. The first base layer is arranged horizontally, and the first embossing units and broken-line embossing are both disposed on the upper surface of the first base layer. Both the first embossing units and broken-line embossing are arranged longitudinally. Multiple first embossing units are evenly spaced along the horizontal direction, and broken-line embossing is disposed between adjacent first embossing units. The longitudinal center of the broken-line embossing is equal to the horizontal distance between adjacent first embossing units. The advantage of this structure is that, through this embossing pattern design, the absorbed liquid can be evenly distributed on the paper, enhancing the paper's absorbency and aesthetics.

[0040] The broken-line embossing includes multiple linear embossing patterns 13, which are evenly distributed and spaced apart along the longitudinal direction. The advantages of this structure are: the embossing pattern design allows for faster liquid delivery and storage, and enhances the absorbency of the paper.

[0041] The first embossing unit includes a first embossing pattern group and a second embossing pattern. Both the first embossing pattern group and the second embossing pattern are arranged longitudinally. The second embossing pattern includes two sinusoidal embossed patterns 12 arranged symmetrically in the horizontal direction. The first embossing pattern group is located between the two sinusoidal embossed patterns, and the longitudinal center of the first embossing pattern group is equidistant from the horizontal distance between the two adjacent sinusoidal embossed patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas. The second embossing pattern is set as a sinusoidal embossing pattern, i.e., in a river-like shape, which can improve the fluidity of water on the paper and improve the hydrophobicity of the paper. The arrangement of the second embossing pattern can achieve different tactile sensations and water retention properties. The sinusoidal embossing distributes the internal material evenly, and the different shapes and areas of the first embossing pattern group and the second embossing pattern achieve different tactile sensations and water retention properties. The rapid diffusion of liquid on the paper surface is achieved by arranging linear embossing patterns and sinusoidal linear embossing patterns.

[0042] The first embossed pattern group includes multiple first embossed patterns 11, which are evenly distributed and spaced along the longitudinal direction. Each first embossed pattern includes multiple dot-shaped embossing patterns 1101 distributed in a circumferential array. The advantages of this structure are: the dot-shaped embossing increases the surface area of ​​the paper, forming multiple small grooves that better absorb and store moisture. Simultaneously, the embossed surface is rougher, increasing friction and adhesion, which helps to adsorb dust and grease, thereby improving cleaning efficiency.

[0043] The embossed tissue paper of the present invention is provided with a first embossed pattern group and a second embossed pattern. The first embossed pattern and the second embossed pattern improve the touch and water and oil absorption performance of the tissue paper. The sinusoidal embossing can make liquid preferentially transported along the linear embossed area, improve the water absorption rate, and improve the user experience of the tissue paper.

[0044] This invention utilizes capillary action to absorb water from tissue paper. When liquid comes into contact with paper, capillaries form between the paper fibers, allowing the liquid to permeate and diffuse along these fiber gaps. The embossing process increases the paper's porosity and surface area, providing more contact points and penetration paths for the liquid. Specifically, the linear embossing in this design guides the liquid to diffuse rapidly across the paper surface, increasing the absorption rate. The dotted embossing, by creating numerous tiny recessed areas, provides ample water storage space, thereby increasing the paper's absorbency.

[0045] This invention increases the porosity and surface area of ​​paper through linear and dot-like embossing, thereby improving water absorption and enabling the paper to quickly absorb and diffuse liquids. The design of the embossing pattern and depth enhances the paper's softness while maintaining strength. The multi-layered body structure and optimized embossing design effectively improve the paper's longitudinal and transverse tensile indices, as well as its wet tensile index, ensuring the paper is not easily torn during use and maintains stable strength performance. Linear embossing not only beautifies the paper surface but also guides liquids to diffuse rapidly along linear areas. The tiny recessed areas created by dot-like embossing provide ample water storage space for liquids, further enhancing the paper's water absorption and moisture absorption efficiency. The different areas of the first and second embossing patterns, along with the combination of linear and dot-like embossing, achieve an optimal balance between tactile feel and water storage performance, avoiding paper hardening caused by excessive embossing.

[0046] In this embodiment, both the linear embossing and the sinusoidal linear embossing are recessed downwards from the upper surface of the first base layer, and are recessed within the main body base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow, downwardly recessed grooves 1004. The greater embossing depth enhances the compactness of the paper and prevents the paper from dispersing during use. Preferably, the linear embossing and sinusoidal linear embossing on the first base layer can be presented as dot-like indentations or line-like indentations. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it presents as dot-like indentations, making the paper surface uneven, increasing the paper's bulk, and thus enhancing its absorbency and softness. When the aspect ratio of the linear embossing is greater than or equal to 5, it presents as line-like indentations, highlighting the embossed pattern, enhancing the visual effect of the embossed pattern, and making the paper more aesthetically pleasing.

[0047] In this embodiment, the area of ​​the first embossed pattern is 0.3-8 cm². 2 The preferred size is 0.8-6cm. 2 The area of ​​the second embossed pattern is 0.1-2 cm². 2 The preferred size is 0.2-0.4cm. 2 Meanwhile, the area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern. The first and second embossed patterns enhance the paper's strength by creating a raised structure on the paper surface, making the paper less prone to tearing during use and thus improving its durability. Furthermore, the area of ​​the first indentation 1004 formed by both the first and second embossed patterns is 0.5-6 mm². 2 Preferably, it is 0.8-1.5mm. 2The spacing between the first embossed pattern and the first embossed pattern forming the first indentation 1004 is 0.5-3mm, preferably 1-2mm, so that the embossed paper can better lock in moisture after absorbing water, further improving the comfort of use.

[0048] In this embodiment, the area of ​​the second embossed pattern is smaller than that of the first embossed pattern, thereby achieving different tactile sensations and water storage performance. The liquid spreads rapidly on the paper surface by arranging linear embossing and sinusoidal linear embossing.

[0049] In this embodiment, the arrangement of the first embossing units on the first embossing surface can be continuous or discontinuous and independent. In this example, the first embossing units are continuous, and adjacent first embossing units share the same first embossing pattern.

[0050] In this embodiment, the paper edge line of the body base layer intersects with at least one first embossing unit, so that at least a portion of the first embossing units are adjacent to the edge line and form a bond at the edge line, thereby bonding the body base layer at the paper edge of the body base layer and preventing the paper from separating at the edge.

[0051] In this embodiment, the sum of the areas of the first embossed pattern, the second embossed pattern, and the linear embossing is less than or equal to 70% of the area of ​​the first embossed unit, preferably less than or equal to 60%, in order to reduce damage to the paper strength.

[0052] In this embodiment, the second embossed surface includes a second base layer 103 and a plurality of second embossed units 151. The plurality of second embossed units are evenly distributed and spaced apart. The arrangement of the second embossed units can simultaneously optimize water absorption performance, touch, and softness, resulting in higher quality tissue paper. The second base layer is connected to the lower surface of the main base layer, and the second embossed units are connected to the lower surface of the second base layer. The second embossed unit includes a plurality of dot-shaped embossing (not labeled in the figure). The plurality of dot-shaped embossing forms a second indentation 1510 on the second embossed surface. The second indentation is raised upward from the lower surface of the second base layer and is located within the main base layer. The longitudinal cross-section of the second indentation is a hollow, upward-protruding groove. The groove formed by the dot-shaped embossing increases the surface area of ​​the paper, providing more water storage space and improving the paper's hygroscopicity. At the same time, it creates undulations in the thickness direction of the paper, increasing the paper's bulk and softness.

[0053] Preferably, the second indentation is arranged in an array on the second embossed surface. Dot-like embossing allows air to accumulate in the uncompacted areas, forming small air bubbles, which increases the paper's fluffiness and makes it softer and more comfortable to the touch. The embossed surface is rougher, increasing friction and adhesion. Linear embossing creates a mortise-and-tenon-like structure on the paper surface, with concave and convex surfaces nested together, making the tissue more compact and less prone to crumbling, and less likely to break when wet.

[0054] In this embodiment, the first base layer can be fiber paper made from various cellulose fibers through wet or dry processes. To ensure the softness of the tissue paper, virgin wood pulp fiber is selected as the raw material for tissue paper making. According to the fiber characteristics, long fibers and short fibers are processed separately, increasing the amount of short fibers, which can reach up to 85% of the total paper weight. This ensures that the base paper has high softness, good tensile strength, and good water absorption speed, making the paper thick and tough, thus improving the product's cost-effectiveness.

[0055] In this embodiment, the first base layer can be cellulose fiber paper made from various cellulose fibers through wet or dry papermaking processes. The cellulose fibers can be wood pulp, straw pulp, sugarcane pulp, or viscose fibers formed by wet spinning after alkalization and other treatments. Other non-natural fibers can also be added to the cellulose fiber paper, such as nanocellulose, polymers, and bacterial cellulose, which can enhance the mechanical properties and functionality of the paper. The first base layer has a basis weight of 10-30 g / m², preferably 12-20 g / m², or more preferably 14-18 g / m². Higher basis weight generally means thicker toilet paper, thus better toughness. Thicker toilet paper is less prone to tearing during use, increasing its durability.

[0056] In this embodiment, the height of the sinusoidal embossing of the first embossed pattern is 0.8–1.2 mm, and the distance between two sinusoidal embossed patterns is 0.5–0.8 mm.

[0057] Alternatively, the height of the linear embossing is 0.8–1.2 mm, and the diameter of the linear embossing is 0.5–0.8 mm.

[0058] Alternatively, the density of all dot-shaped embossing on both the first and second embossed surfaces is 20–50 dots / cm². 2 The height of the dotted embossing is 0.8-1.0 mm.

[0059] Alternatively, all the dot-shaped embossing on the first and second embossed surfaces are frustum-shaped protrusions, and the top of the frustum-shaped embossed surface is provided with rounded corners.

[0060] Furthermore, the bottom diameter of the dotted embossed frustum is 0.5–1.2 mm, the top diameter of the frustum is 0.4–1.0 mm, and the radius of the rounded corner at the top of the frustum is 0.1–0.5 mm.

[0061] Example 1

[0062] An embossed tissue paper with an embossed pattern that improves the absorbency, softness, and strength of tissue paper, such as... Figures 1 to 3 As shown, the household paper 100 includes a body base layer 102, a first embossed surface 1001 and a second embossed surface 1002. The first embossed surface, the body base layer and the second embossed surface are connected in sequence from top to bottom in the vertical direction. The first embossed surface, the body base layer and the second embossed surface are both arranged in the horizontal direction.

[0063] The main body base layer is set as one layer, and two or more main body base layers are connected together from top to bottom; the setting of the main body base layer improves the bulk and paper strength of the tissue paper of the present invention.

[0064] The first embossed surface includes a first base layer 101, multiple first embossing units 1003, and broken-line embossing. The first base layer is arranged horizontally, and the first embossing units and broken-line embossing are both disposed on the upper surface of the first base layer. Both the first embossing units and broken-line embossing are arranged longitudinally. Multiple first embossing units are evenly spaced along the horizontal direction, and broken-line embossing is disposed between adjacent first embossing units. The longitudinal center of the broken-line embossing is equal to the horizontal distance between adjacent first embossing units. The advantage of this structure is that, through this embossing pattern design, the absorbed liquid can be evenly distributed on the paper, enhancing the paper's absorbency and aesthetics.

[0065] The broken-line embossing includes multiple linear embossing patterns 13, which are evenly distributed and spaced apart along the longitudinal direction. The advantages of this structure are: the embossing pattern design allows for faster liquid delivery and storage, and enhances the absorbency of the paper.

[0066] The first embossing unit includes a first embossing pattern group and a second embossing pattern. Both the first embossing pattern group and the second embossing pattern are arranged longitudinally. The second embossing pattern includes two sinusoidal embossed patterns 12 arranged symmetrically in the horizontal direction. The first embossing pattern group is located between the two sinusoidal embossed patterns, and the longitudinal center of the first embossing pattern group is equidistant from the horizontal distance between the two adjacent sinusoidal embossed patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas. The second embossing pattern is set as a sinusoidal embossing pattern, i.e., in a river-like shape, which can improve the fluidity of water on the paper and improve the hydrophobicity of the paper. The arrangement of the second embossing pattern can achieve different tactile sensations and water retention properties. The sinusoidal embossing distributes the internal material evenly, and the different shapes and areas of the first embossing pattern group and the second embossing pattern achieve different tactile sensations and water retention properties. The rapid diffusion of liquid on the paper surface is achieved by arranging linear embossing patterns and sinusoidal linear embossing patterns.

[0067] The first embossed pattern group includes multiple first embossed patterns 11, which are evenly distributed and spaced along the longitudinal direction. Each first embossed pattern includes multiple dot-shaped embossing patterns 1101 distributed in a circumferential array. The advantages of this structure are: the dot-shaped embossing increases the surface area of ​​the paper, forming multiple small grooves that better absorb and store moisture. Simultaneously, the embossed surface is rougher, increasing friction and adhesion, which helps to adsorb dust and grease, thereby improving cleaning efficiency.

[0068] In this embodiment, both the linear embossing and the sinusoidal linear embossing are recessed downwards from the upper surface of the first base layer, and are recessed within the main body base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow, downwardly recessed grooves 1004. The greater embossing depth enhances the compactness of the paper and prevents the paper from dispersing during use. Preferably, the linear embossing and sinusoidal linear embossing on the first base layer can be presented as dot-like indentations or line-like indentations. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it presents as dot-like indentations, making the paper surface uneven, increasing the paper's bulk, and thus enhancing its absorbency and softness. When the aspect ratio of the linear embossing is greater than or equal to 5, it presents as line-like indentations, highlighting the embossed pattern, enhancing the visual effect of the embossed pattern, and making the paper more aesthetically pleasing.

[0069] The area of ​​the first embossed pattern is 0.8-6 cm². 2 The area of ​​the second embossed pattern is 0.2-0.4 cm². 2Meanwhile, the area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern. The first and second embossed patterns enhance the paper's strength by creating a raised structure on the paper surface, making the paper less prone to tearing during use and thus improving its durability. Furthermore, the area of ​​the first indentation 1004 formed by both the first and second embossed patterns is 0.8-1.5 mm. 2 The spacing between the first embossed pattern and the first embossed pattern forming the first indentation 1004 is 1-2mm, which allows the embossed paper to better retain moisture after absorbing water, further improving the comfort of use.

[0070] The area of ​​the second embossed pattern is smaller than that of the first embossed pattern, thereby achieving different tactile sensations and water retention properties. The liquid spreads rapidly on the paper surface by arranging linear embossing and sinusoidal linear embossing.

[0071] The arrangement of the first embossing units on the first embossing surface can be continuous or discontinuous and independent. In this example, the first embossing units are continuous, and adjacent first embossing units share the same first embossing pattern.

[0072] The paper edge line of the body base is intersected with at least one first embossing unit, such that at least a portion of the first embossing units are adjacent to the edge line and form a bond at the edge line, thereby bonding the body base at the paper edge of the body base and preventing the paper from separating at the edge.

[0073] The sum of the areas of the first embossed pattern, the second embossed pattern, and the linear embossing is less than or equal to 60% of the area of ​​the first embossed unit, in order to reduce damage to the paper strength.

[0074] The second embossed surface includes a second base layer 103 and multiple second embossing units 151. These units are evenly distributed and spaced apart. The inclusion of these second embossing units simultaneously optimizes absorbency, feel, and softness, resulting in higher-quality tissue paper. The second base layer is connected to the lower surface of the main base layer, and the second embossing units are also connected to the lower surface of the second base layer. Each second embossing unit includes multiple dot-shaped embossings (not labeled in the figure). These dot-shaped embossings form second indentations 1510 on the second embossed surface. These second indentations protrude upwards from the lower surface of the second base layer and are located within the main base layer. The longitudinal cross-section of the second indentation is a hollow, upward-protruding groove. The grooves formed by the dot-shaped embossings increase the surface area of ​​the paper, providing more water storage space and improving the paper's hygroscopicity. Simultaneously, they create undulations in the thickness direction, increasing the paper's bulk and softness.

[0075] The second embossing marks are arranged in an array on the second embossed surface. Dot-like embossing allows air to accumulate in the uncompacted areas, forming small air bubbles, which increases the paper's fluffiness and makes it softer and more comfortable to the touch. The embossed surface is rougher, increasing friction and adhesion. Linear embossing creates a mortise-and-tenon-like structure on the paper surface, with concave and convex surfaces nested together, making the tissue more compact and less prone to crumbling, and less likely to tear when wet.

[0076] The height of the sinusoidal embossing of the first embossed pattern is 0.8–1.2 mm, and the distance between two sinusoidal embossed patterns is 0.5–0.8 mm;

[0077] The height of the linear embossing is 0.8–1.2 mm, and the diameter of the linear embossing is 0.5–0.8 mm.

[0078] The density of all dot-shaped embossing on the first and second embossed surfaces is 20–50 dots / cm². 2 The height of the dotted embossing is 0.8-1.0 mm.

[0079] All dot-shaped embossing on the first and second embossed surfaces are frustum-shaped protrusions, and the top of the frustum-shaped embossing is provided with rounded corners.

[0080] The bottom diameter of the dotted embossed frustum is 0.5–1.2 mm, the top diameter of the frustum is 0.4–1.0 mm, and the radius of the rounded corner at the top of the frustum is 0.1–0.5 mm.

[0081] The relevant tests of this invention:

[0082] Comparative Examples 1-3 in Table 1 are identical to Example 1 in all aspects except for the embossed surface layer (i.e., the first embossed surface 1001), embossed core layer (i.e., the body base layer 102), and embossed bottom layer (i.e., the second embossed surface 1002) used.

[0083] The experiment was conducted according to the national standard (GB / T 461.3-2005) for the determination of water absorption of paper and paperboard (immersion method).

[0084] 1. Household paper is typically composed of multiple layers of paper. These layers may be embossed or otherwise used to increase the contact area, thereby improving absorbency. When embossed paper passes through a liquid, the sinusoidal embossing rapidly transports the liquid, allowing it to quickly distribute throughout the paper and be stored within the dotted and broken-line embossing patterns. The embossed surface layer and embossed core layer are supported by raised structures, as are the raised structures between the embossed core layer and the embossed bottom layer. With the core layer as the dividing line, the raised units in the upper and lower layers are evenly distributed, creating symmetrical three-dimensional water-locking spaces. These raised structures effectively maintain the overall structural stability of the household paper, increasing water storage capacity while enhancing the stability of the paper structure.

[0085] Table 1

[0086]

[0087]

[0088] 2. As can be seen from Table 1, Example 1 of the present invention has significantly higher water absorption capacity and water absorption rate than Comparative Example 1 and Comparative Example 2. The mass of Example 1 after water absorption is higher than that of any two-layer combination, and the total mass is increased by more than 50% compared to the two-layer paper web after water absorption. The water absorption capacity (g / g) is also increased by more than 20%. In addition, the water absorption rate of the examples is higher than that measured by any two-layer paper web combination, with an increase of 16.1% to 25.1%. By comparing the performance of the three-layer structure paper with that of the two-layer structure paper, it is clear that the three-layer embossed tissue paper structure disclosed in the present invention—embossed surface layer, embossed core layer, and embossed bottom layer—can play a very good synergistic role. In particular, there is a significant synergistic effect between the embossed core layer and the embossed surface layer, which can greatly synergistically improve the total water absorption, water absorption rate, and water absorption capacity of the tissue paper. The increased water absorption performance of the tissue paper allows it to absorb a large amount of water in a short time to meet consumer demand. Furthermore, the wet tensile strength, wet tensile strength, and wet tear strength of the tissue paper sample in Example 1 were all higher than those in Comparative Examples 1 and 2. This indicates that the three-layer structure of the tissue paper involved in this invention has excellent synergistic effects, especially the significant synergistic effect between the embossed core layer and the embossed surface layer. This not only greatly improves the water absorption performance of the tissue paper but also enhances its mechanical properties in a wet state, thus improving the user experience for consumers. This synergistic effect between the high water absorption and high mechanical properties of the tissue paper and its three-layer structure is inseparable, which fully demonstrates the advantages and innovation of this invention.

[0089] Although embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the scope of the invention is not limited to the contents disclosed in the embodiments.

Claims

1. An embossed tissue paper with an embossed pattern that improves the absorbency, softness, and strength of tissue paper, characterized in that: The tissue paper includes a base layer, a first embossed surface, and a second embossed surface. The first embossed surface, the base layer, and the second embossed surface are connected in sequence from top to bottom in the vertical direction, and the first embossed surface, the base layer, and the second embossed surface are all arranged in the horizontal direction. The body base layer is set to at least one layer, and two or more body base layers are connected together from top to bottom; The first embossed surface includes a first base layer, multiple first embossed units, and broken-line embossing. The first base layer is arranged in a horizontal direction, and the first embossed units and broken-line embossing are both arranged on the upper surface of the first base layer. The first embossed units and broken-line embossing are both arranged in a longitudinal direction. Multiple first embossed units are evenly distributed and spaced apart in a horizontal direction. Broken-line embossing is arranged between two adjacent first embossed units. The longitudinal center of the broken-line embossing is equal to the horizontal distance between two adjacent first embossed units. The broken-line embossing includes multiple linear embossings, which are evenly distributed and spaced apart along the longitudinal direction; The first embossing unit includes a first embossing pattern group and a second embossing pattern. Both the first embossing pattern group and the second embossing pattern are arranged longitudinally. The second embossing pattern includes two sinusoidal embossing patterns symmetrically arranged in the horizontal direction. The first embossing pattern group is arranged between the two sinusoidal embossing patterns. The longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal embossing patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas. The first embossed pattern group includes multiple first embossed patterns, which are evenly distributed and spaced apart along the longitudinal direction. Each first embossed pattern includes multiple dot-shaped embossing patterns distributed in a circumferential array. The linear embossing and sinusoidal linear embossing are both recessed from the upper surface of the first base layer and recessed into the main body base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed into a groove shape. The linear embossing and sinusoidal linear embossing appear as linear indentations when presented alone on the first base layer. The aspect ratio of the linear embossing is greater than or equal to 5, and it appears as a linear indentation. The area of ​​the first embossed pattern is 0.3-8 cm². 2 The area of ​​the second embossed pattern is 0.1-2 cm². 2 The area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern; the area of ​​the first indentation formed by the first and second embossed patterns is 0.5-6mm. 2 The spacing between the first embossed pattern and the first embossed pattern forming the first indentation is 0.5-3mm; The second embossed surface includes a second base layer and a plurality of second embossed units. The plurality of second embossed units are evenly distributed and spaced apart. The second base layer is connected and disposed on the lower surface of the main body base layer. The second embossed units are connected and disposed on the lower surface of the second base layer. The second embossed unit includes a plurality of dot-shaped embossing. The plurality of dot-shaped embossing forms a second indentation on the second embossed surface. The second indentation is raised upward from the lower surface of the second base layer and is raised upward within the main body base layer. The longitudinal section of the second indentation is a hollow and upward-protruding groove. The second indentation is arranged in an array on the second embossed surface; The height of the sinusoidal embossing of the first embossed pattern is 0.8~1.2 mm, and the distance between two sinusoidal embossed patterns is 0.5~0.8 mm; The height of the linear embossing is 0.8~1.2 mm, and the diameter of the linear embossing is 0.5~0.8 mm; The density of all dot-shaped embossing on the first and second embossed surfaces is 20~50 dots / cm². 2 The height of the dotted embossing is 0.8-1.0 mm; All dot-shaped embossing on the first and second embossed surfaces are frustum-shaped protrusions, and the top of the frustum-shaped embossing is provided with rounded corners; The bottom diameter of the dot-shaped embossed frustum is 0.5~1.2 mm, the top diameter of the frustum is 0.4~1.0 mm, and the radius of the rounded corner at the top of the frustum is 0.1~0.5 mm.

2. The embossed tissue paper according to claim 1, characterized in that: The area of ​​the second embossed pattern is smaller than the area of ​​the first embossed pattern; The arrangement of the first embossing units on the first embossing surface is discontinuous and independent.

3. The embossed household paper according to claim 1, characterized in that: The paper edge line of the body base is intersected with at least one first embossing unit; The sum of the areas of the first embossed pattern, the second embossed pattern, and the linear embossed pattern is less than or equal to 70% of the area of ​​the first embossed unit.

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