Embossed paper for daily use provided with embossed patterns capable of improving absorption performance, softness performance and strength performance of paper for daily use

Abstract

The invention belongs to the technical field of articles for daily use, and discloses an embossed paper for daily use, which is provided with an embossed pattern capable of improving the absorption performance, softness and strength performance of the paper for daily use, and comprises a body base layer, a first embossed surface and a second embossed surface, the first embossed surface, the body base layer and the second embossed surface are sequentially connected from top to bottom in the vertical direction, and the first embossed surface, the body base layer and the second embossed surface are all arranged in the horizontal direction; the first embossed surface comprises a first base layer, a plurality of first embossed units and broken-line-shaped embossments. The embossed paper for daily use is provided with the first embossed pattern group and the second embossed pattern group, the touch feeling and the water and oil absorption performance of the paper for daily use are improved through the first embossed pattern group and the second embossed pattern group, liquid can be preferentially conveyed along the linear embossed area through sine embossing, the water absorption rate is increased, and the use experience of the paper for daily use is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of daily necessities, in particular to an embossed daily paper provided with an embossed pattern for improving the absorption performance, softness and strength performance of the daily paper. Background Art

[0002] With the development of economy and the improvement of living standards, consumers' pursuit of quality of life is also increasing, and this trend is particularly evident in the field of household paper. Household paper, including but not limited to toilet paper, facial tissue, napkin paper, etc., has three key indicators of its quality - water absorption, softness and strength, which have become important considerations for consumers when choosing products. Patent publication (CN110318298B) discloses a multi-layer kitchen paper containing a composite sizing liquid, the multi-layer kitchen paper, including an upper base paper and a lower base paper, is through a sizing layer (including a composite sizing liquid: such as anionic rosin sizing agent, cationic starch sizing agent, cationic water-based polyurethane-acrylate, sizing enhancer and water) The upper and lower layers of base paper are compounded together, and the sizing enhancer mainly includes a mixture of pyridine compounds, polysorbates, carboxymethyl cellulose, etc. without fluorine ethyl substitution. Some of the chemical agents used in the patent publication are toxic and harmful to the human body or the environment. Patent publication (CN110565427A) discloses a highly antibacterial natural bamboo fiber kitchen paper and a preparation method thereof. The patent publication mainly involves a method for obtaining bamboo pulp fiber from bamboo slice raw materials, and then discloses that the preparation of kitchen paper with this fiber can effectively improve its antibacterial performance, which has little to do with the embossing process and the multi-layer structure to improve the water absorption performance of kitchen paper. Patent publication (CN109914155A) discloses a kitchen paper and a preparation method thereof. The patent publication mainly involves a papermaking process using Qianjin Fang medicinal residues, and discloses processes including pretreatment, pulping, extraction of medicinal components from filtrate and paper modification, and uses a puffing process and freezing and hot air drying processes to improve the bulk, softness, antibacterial properties, etc. of kitchen paper. However, the patent publication does not involve the influence of embossing process and multi-layer process on the absorption performance of kitchen paper. However, while the traditional embossing process improves the appearance and touch of paper, it may sacrifice the water absorption and strength of paper to a certain extent. For example, too dense embossing may cause the fibers between paper layers to be too close, limiting the diffusion of water and thus reducing the softness of the paper. At the same time, this tight structure may also slow down the diffusion of liquid inside the paper, affecting the water absorption performance. In addition, the paper is easy to tear after absorbing water, which not only affects the user experience, but also reflects the lack of paper strength.

[0003] In order to solve these problems, the present invention proposes a new embossing process, aiming to improve the water absorption and softness of paper by improving the embossing pattern and the layer structure, while maintaining or enhancing its strength. Summary of the invention

[0004] The present invention aims to overcome the deficiencies in the prior art and provide an embossed household paper having an embossed pattern design with improved absorption performance, softness performance and strength performance.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An embossed household paper having an embossed pattern for improving the absorption performance, softness and strength performance of the household paper, the household paper comprising a main body base, a first embossed surface and a second embossed surface, the first embossed surface, the main body base and the second embossed surface are sequentially connected from top to bottom in a vertical direction, and the first embossed surface, the main body base and the second embossed surface are all arranged in a horizontal direction;

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

[0008] The first embossed surface comprises a first base layer, a plurality of first embossing units and broken line embossing, the first base layer is arranged in the horizontal direction, and the first embossing units and the broken line embossing are both arranged on the upper surface of the first base layer; the first embossing units and the broken line embossing are both arranged in the longitudinal direction, a plurality of first embossing units are evenly spaced and arranged in the horizontal direction, a broken line embossing is arranged between two adjacent first embossing units, and the longitudinal center of the broken line embossing is equal to the horizontal distance between the two adjacent first embossing units;

[0009] The broken line embossing comprises a plurality of line embossings, and the plurality of line embossings are evenly spaced and arranged in the longitudinal direction;

[0010] The first embossing unit comprises a first embossing pattern group and a second embossing pattern, the first embossing pattern group and the second embossing pattern are both arranged in the longitudinal direction, the second embossing pattern comprises two sinusoidal linear embossing patterns symmetrically arranged in the horizontal direction, the first embossing pattern group is arranged between the two sinusoidal linear embossing patterns, and the longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal linear embossing patterns; the first embossing pattern group and the second embossing pattern have different shapes and areas;

[0011] The first embossing pattern group includes a plurality of first embossing patterns, and the plurality of first embossing patterns are evenly spaced and arranged in the longitudinal direction, and the first embossing pattern includes a plurality of dot embossings distributed in a circumferential array.

[0012] Furthermore, the linear embossing and sinusoidal linear embossing are both recessed downward from the upper surface of the first base layer, and are recessed downward in the main base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed downward.

[0013] Furthermore, the linear embossing and sinusoidal linear embossing individually presented on the first base layer may be in the form of point indentations or line indentations. When the aspect ratio of the linear embossing is less than or equal to 5, it appears as point indentations; when the aspect ratio of the linear embossing is greater than or equal to 5, it appears as line indentations.

[0014] Furthermore, the area of ​​the first embossed pattern is 0.3-8 cm 2 The area of ​​the second embossed pattern is 0.1-2 cm 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 embossed pattern and the second embossed pattern is 0.5-6mm 2 The spacing between the first indentations formed by the first embossing pattern and the second embossing pattern is 0.5-3 mm.

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

[0016] Alternatively, the layout of the first embossing units on the first embossing surface is continuous or discontinuous and independent of each other.

[0017] Furthermore, the paper edge line of the main body base layer is arranged to intersect with at least one first embossing unit;

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

[0019] Furthermore, the second embossed surface includes a second base layer and a plurality of second embossing units, the plurality of second embossing units are evenly spaced and arranged, the second base layer is connected and arranged on the lower surface of the main base layer, the second embossing units are connected and arranged on the lower surface of the second base layer, the second embossing units include a plurality of point embossings, the plurality of point embossings form a second indentation on the second embossed surface, the second indentation is protruded upward from the lower surface of the second base layer, and is protruded upward in the main base layer, and the longitudinal section of the second indentation is hollow and protrudes upward in the shape of a convex groove.

[0020] Furthermore, the second indentations are arranged in an array on the second embossed surface.

[0021] Furthermore, the height of the sinusoidal line embossing of the first embossing pattern is 0.8-1.2 mm, and the distance between two sinusoidal line embossings is 0.5-0.8 mm;

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

[0023] Alternatively, the density of all dot embossings on the first embossed surface and the second embossed surface is 20 to 50 dots / cm 2 The height of the dot embossing is 0.8-1.0 mm.

[0024] Alternatively, all the dot-shaped embossings on the first embossing surface and the second embossing surface are truncated cone protrusions, and the tops of the dot-shaped embossed cones are provided with rounded corners.

[0025] Furthermore, the bottom diameter of the dot-embossed cone is 0.5-1.2 mm, the top diameter of the cone is 0.4-1.0 mm, and the fillet radius of the top of the cone is 0.1-0.5 mm.

[0026] The advantages and positive effects achieved by the present invention are:

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

[0028] 2. The design of the embossing pattern and embossing depth of the present invention improves the softness of the paper while ensuring strength. The multi-layer body base structure and optimized embossing design effectively improve the longitudinal and transverse tensile index of the paper, as well as the wet tensile index, ensuring that the paper is not easy to tear during use and maintains stable strength performance.

[0029] 3. The present invention increases the porosity and surface area of ​​the paper through the design of linear embossing and dot embossing, improves the water absorption capacity, and enables the paper to quickly absorb and diffuse liquid. The linear embossing not only beautifies the surface of the paper, but also guides the liquid to diffuse rapidly along the linear area. The tiny concave area formed by the dot embossing provides abundant water storage space for the liquid, further improving the water absorption capacity and moisture absorption efficiency of the paper.

[0030] 4. The different area designs of the first embossing pattern and the second embossing pattern of the present invention, as well as the combination of linear embossing and dot embossing, achieve the best balance between touch and water storage performance, and avoid paper hardening caused by excessive embossing.

[0031] 5. The embossed pattern of the present invention effectively improves the absorption performance, softness and strength of household paper, and meets diverse application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic top view of a structure connection of a first embossed surface of the embossed household paper of the present invention;

[0033] Figure 2is a bottom view schematically showing the second embossed surface of the embossed household paper of the present invention;

[0034] Figure 3 for Figure 1 Schematic diagram of the main section view of the structural connection along the AA direction. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0036] The raw materials used in the present invention, unless otherwise specified, are conventional commercial products, the methods used in the present invention, unless otherwise specified, are conventional methods in the art, and the quality of each substance used in the present invention is conventional quality. The structures, connection relationships, etc. not described in detail in the present invention can be understood as conventional technical means in the art.

[0037] An embossed tissue paper having an embossed pattern for improving the absorbency, softness and strength of the tissue paper, such as Figures 1 to 3 As shown, the household paper 100 comprises a main body base 102, a first embossed surface 1001 and a second embossed surface 1002, the first embossed surface, the main body base and the second embossed surface are sequentially connected from top to bottom along the vertical direction, and the first embossed surface, the main body base and the second embossed surface are all arranged in the horizontal direction;

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

[0039] The first embossed surface includes a first base layer 101, a plurality of first embossing units 1003 and broken line embossing, the first base layer is arranged in the horizontal direction, and the first embossing units and the broken line embossing are both arranged on the upper surface of the first base layer; the first embossing units and the broken line embossing are both arranged in the longitudinal direction, a plurality of first embossing units are evenly spaced and arranged in the horizontal direction, and the broken line embossing is arranged between two adjacent first embossing units, and the longitudinal center of the broken line embossing is equal to the horizontal distance between the two adjacent first embossing units. The advantage of this structure is that through the embossing pattern design, the absorbed liquid can be evenly distributed on the paper, which enhances the absorption performance of the paper and also enhances the aesthetics of the paper.

[0040] The broken line embossing includes a plurality of line embossings 13, which are evenly spaced and arranged longitudinally. The advantage of this structure is that the liquid can be transported and stored faster through the embossing pattern design, thereby enhancing the absorption performance of the paper.

[0041] The first embossing unit includes a first embossing pattern group and a second embossing pattern. The first embossing pattern group and the second embossing pattern are both arranged in the longitudinal direction. The second embossing pattern includes two sinusoidal linear embossing patterns 12 arranged symmetrically in the horizontal direction. The first embossing pattern group is arranged between the two sinusoidal linear embossing patterns. The longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal linear embossing patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas. The second embossing pattern is arranged as a sinusoidal linear embossing pattern, i.e., in the shape of a river, which can improve the fluidity of water on the paper and improve the hydrophobicity of the paper. The second embossing pattern can achieve different tactile sensations and water storage properties. The sinusoidal linear embossing is evenly distributed inside, and the first embossing pattern group and the second embossing pattern have different shapes and areas, thereby achieving different tactile sensations and water storage properties. The liquid can be quickly diffused on the paper surface by arranging linear embossing and sinusoidal linear embossing.

[0042] The first embossing pattern group includes a plurality of first embossing patterns 11, which are evenly spaced and arranged longitudinally, and the first embossing pattern includes a plurality of dot embossing patterns 1101 distributed along a circumferential array. The advantages of this structure are: the dot embossing increases the surface area of ​​the paper and forms a plurality of small grooves, which can better absorb and store moisture. At the same time, the embossed surface is rougher, which increases friction and adhesion, helps to absorb dust and grease, and thus improves cleaning efficiency.

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

[0044] The present invention uses capillary phenomena to absorb water from household paper. When liquid contacts paper, the pores between paper fibers form capillaries, and the liquid penetrates and diffuses along the fiber gaps under the action of these capillaries. The embossing process increases the porosity and surface area of ​​the paper, providing more contact points and penetration paths for the liquid. Specifically, the linear embossing in the embossing pattern can guide the liquid to diffuse rapidly on the paper surface, thereby increasing the water absorption rate. The point embossing provides a lot of water storage space for the liquid by forming many tiny concave areas, thereby increasing the water absorption of the paper.

[0045] The present invention increases the porosity and surface area of ​​the paper and improves the water absorption capacity through the design of linear embossing and dot embossing, so that the paper can quickly absorb and diffuse liquid. The design of the embossing pattern and embossing depth improves the softness of the paper while ensuring strength. The multi-layer body base structure and optimized embossing design effectively improve the longitudinal and transverse tensile indexes of the paper, as well as the wet tensile index, to ensure that the paper is not easy to tear during use and maintains stable strength performance. Linear embossing not only beautifies the surface of the paper, but also guides the liquid to diffuse rapidly along the linear area. The tiny concave area formed by the dot embossing provides abundant water storage space for the liquid, further improving the water absorption capacity and moisture absorption efficiency of the paper. The different area designs of the first embossing pattern and the second embossing pattern, as well as the combination of linear embossing and dot embossing, achieve the best balance between touch and water storage performance, and avoid paper hardening caused by excessive embossing.

[0046] In this embodiment, the linear embossing and sinusoidal linear embossing are both recessed downward from the upper surface of the first base layer, and are recessed in the main base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed in a groove shape 1004, and the compactness of the paper is enhanced by a larger embossing depth to prevent the paper from being scattered during use. Preferably, the linear embossing and sinusoidal linear embossing can be presented separately on the first base layer in the form of dot indentations or linear indentations. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it appears as a dot indentation, making the surface of the paper uneven, increasing the bulk of the paper, and further enhancing its water absorption and softness. When the aspect ratio of the linear embossing is greater than or equal to 5, it appears as a linear indentation, highlighting the embossing pattern, strengthening the visual effect of the embossing pattern, and making the paper more ornamental.

[0047] In this embodiment, the area of ​​the first embossed pattern is 0.3-8 cm 2 , preferably 0.8-6cm 2 The area of ​​the second embossed pattern is 0.1-2 cm 2 , preferably 0.2-0.4cm 2 At the same time, the area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern. The first embossed pattern and the second embossed pattern enhance the strength of the paper by forming a raised structure on the surface of the paper, making the paper less likely to break during use, thereby improving durability. At the same time, the area of ​​the first indentation 1004 formed by the first embossed pattern and the second embossed pattern is 0.5-6mm 2 , preferably 0.8-1.5mm 2The spacing between the first indentations 1004 formed by the first embossing pattern and the second embossing pattern is 0.5-3 mm, preferably 1-2 mm, so that the embossed paper can better lock moisture after absorbing water, further improving the comfort of use.

[0048] In this embodiment, the area of ​​the second embossing pattern is smaller than that of the first embossing pattern, so as to achieve different tactile sensations and water storage properties, and rapid diffusion of liquid on the paper surface is achieved by arranging linear embossing and sinusoidal linear embossing.

[0049] In this embodiment, the layout of the first embossing units on the first embossing surface may be continuous or discontinuous and independent of each other. 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 main base layer is intersected with at least one first embossing unit, so that at least a portion of the first embossing unit is adjacent to the edge line and forms a bond at the edge line, so that the main base layer is bonded at the paper edge of the main base layer, thereby preventing the paper sheets from separating at the edges.

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

[0052] In this embodiment, the second embossed surface includes a second base layer 103 and a plurality of second embossed units 151, and the plurality of second embossed units are evenly spaced and arranged. The second embossed units are arranged to optimize water absorption performance, touch and softness at the same time, so as to obtain better quality daily paper. The second base layer is connected and arranged on the lower surface of the main base layer, and the second embossed units are connected and arranged on the lower surface of the second base layer. The second embossed units include a plurality of dot embossings (not numbered in the figure), and the plurality of dot embossings form a second indentation 1510 on the second embossed surface. The second indentation is convexly arranged upward from the lower surface of the second base layer, and is convexly arranged in the main base layer, and the longitudinal section of the second indentation is hollow and convexly grooved upward; the convex groove formed by the dot embossing increases the surface area of ​​the paper, provides more water storage space for water, and improves the hygroscopicity of the paper. At the same time, the paper is made to fluctuate in the thickness direction, thereby increasing the bulk and softness of the paper.

[0053] Preferably, the second indentations are arranged in an array on the second embossed surface. The dot embossing allows air to gather in the uncompacted part to form small bubbles, which increases the fluffiness of the paper and makes the paper feel softer and more comfortable. The embossed surface is rougher, which can increase friction and adhesion. Through linear embossing, a structure similar to mortise and tenon joints can be formed on the surface of the paper, with the concave and convex surfaces nested with each other, making the paper towel more compact and not easy to loosen, and not easy to break when exposed to water.

[0054] In this embodiment, the first base layer can be made of various cellulose fibers through a wet or dry process to make fiber thin paper. In order to ensure the softness of household paper, virgin wood pulp fibers are selected as the raw material for making household paper. According to the fiber characteristics, long fibers and short fibers are separated by pulping process, and the amount of short fibers is increased, and the proportion can reach up to 85% of the overall quality of the paper, ensuring that the base paper has a high softness and good tensile strength, ensuring a good water absorption speed, making the paper thick and tough, and improving the product cost performance.

[0055] In this embodiment, the first base layer can be a cellulose fiber thin paper made of various cellulose fibers by wet or dry papermaking. The cellulose fibers can be fiber materials of wood pulp, straw pulp, and sugarcane pulp, or can be viscose fibers formed by wet spinning after cellulose fibers are treated by alkalization, etc., that is, other non-natural fibers can be added to the cellulose fiber paper. These non-natural fibers can be nanocellulose, polymers, bacterial cellulose, etc., which can enhance the mechanical properties of paper and improve the functionality of paper. The first base layer has a basis weight of 10-30g / ㎡, preferably 12-20g / ㎡, or more preferably 14-18g / ㎡. The higher the paper weight, the thicker the toilet paper is, so its toughness is also better. Thick toilet paper is not easy to break during use, and its durability is enhanced.

[0056] In this embodiment, the height of the sinusoidal line embossing of the first embossing pattern is 0.8-1.2 mm, and the distance between two sinusoidal line embossings is 0.5-0.8 mm;

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

[0058] Alternatively, the density of all dot embossings on the first embossed surface and the second embossed surface is 20 to 50 dots / cm 2 The height of the dot embossing is 0.8-1.0 mm.

[0059] Alternatively, all the dot-shaped embossings on the first embossing surface and the second embossing surface are truncated cone protrusions, and the tops of the dot-shaped embossed cones are provided with rounded corners.

[0060] Furthermore, the bottom diameter of the dot-embossed cone is 0.5-1.2 mm, the top diameter of the cone is 0.4-1.0 mm, and the fillet radius of the top of the cone is 0.1-0.5 mm.

[0061] Example 1

[0062] An embossed tissue paper having an embossed pattern for improving the absorbency, softness and strength of the tissue paper, such as Figures 1 to 3 As shown, the household paper 100 comprises a main body base 102, a first embossed surface 1001 and a second embossed surface 1002, the first embossed surface, the main body base and the second embossed surface are sequentially connected from top to bottom along the vertical direction, and the first embossed surface, the main body base and the second embossed surface are all arranged in the horizontal direction;

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

[0064] The first embossed surface includes a first base layer 101, a plurality of first embossing units 1003 and broken line embossing, the first base layer is arranged in the horizontal direction, and the first embossing units and the broken line embossing are both arranged on the upper surface of the first base layer; the first embossing units and the broken line embossing are both arranged in the longitudinal direction, a plurality of first embossing units are evenly spaced and arranged in the horizontal direction, and the broken line embossing is arranged between two adjacent first embossing units, and the longitudinal center of the broken line embossing is equal to the horizontal distance between the two adjacent first embossing units. The advantage of this structure is that through the embossing pattern design, the absorbed liquid can be evenly distributed on the paper, which enhances the absorption performance of the paper and also enhances the aesthetics of the paper.

[0065] The broken line embossing includes a plurality of line embossings 13, which are evenly spaced and arranged longitudinally. The advantage of this structure is that the liquid can be transported and stored faster through the embossing pattern design, thereby enhancing the absorption performance of the paper.

[0066] The first embossing unit includes a first embossing pattern group and a second embossing pattern. The first embossing pattern group and the second embossing pattern are both arranged in the longitudinal direction. The second embossing pattern includes two sinusoidal linear embossing patterns 12 arranged symmetrically in the horizontal direction. The first embossing pattern group is arranged between the two sinusoidal linear embossing patterns. The longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal linear embossing patterns. The first embossing pattern group and the second embossing pattern have different shapes and areas. The second embossing pattern is arranged as a sinusoidal linear embossing pattern, i.e., in the shape of a river, which can improve the fluidity of water on the paper and improve the hydrophobicity of the paper. The second embossing pattern can achieve different tactile sensations and water storage properties. The sinusoidal linear embossing is evenly distributed inside, and the first embossing pattern group and the second embossing pattern have different shapes and areas, thereby achieving different tactile sensations and water storage properties. The liquid can be quickly diffused on the paper surface by arranging linear embossing and sinusoidal linear embossing.

[0067] The first embossing pattern group includes a plurality of first embossing patterns 11, which are evenly spaced and arranged longitudinally, and the first embossing pattern includes a plurality of dot embossing patterns 1101 distributed along a circumferential array. The advantages of this structure are: the dot embossing increases the surface area of ​​the paper and forms a plurality of small grooves, which can better absorb and store moisture. At the same time, the embossed surface is rougher, which increases friction and adhesion, helps to absorb dust and grease, and thus improves cleaning efficiency.

[0068] In this embodiment, the linear embossing and sinusoidal linear embossing are both recessed downward from the upper surface of the first base layer, and are recessed in the main base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed in a groove shape 1004, and the compactness of the paper is enhanced by a larger embossing depth to prevent the paper from being scattered during use. Preferably, the linear embossing and sinusoidal linear embossing can be presented separately on the first base layer in the form of dot indentations or linear indentations. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it appears as a dot indentation, making the surface of the paper uneven, increasing the bulk of the paper, and further enhancing its water absorption and softness. When the aspect ratio of the linear embossing is greater than or equal to 5, it appears as a linear indentation, highlighting the embossing pattern, strengthening the visual effect of the embossing pattern, and making the paper more ornamental.

[0069] The area of ​​the first embossed pattern is 0.8-6 cm 2 The area of ​​the second embossed pattern is 0.2-0.4 cm 2At the same time, the area of ​​the first embossed pattern is 150%-200% of the area of ​​the second embossed pattern. The first embossed pattern and the second embossed pattern enhance the strength of the paper by forming a raised structure on the surface of the paper, making the paper less likely to break during use, thereby improving durability. At the same time, the area of ​​the first indentation 1004 formed by the first embossed pattern and the second embossed pattern is 0.8-1.5mm 2 The spacing between the first indentation 1004 formed by the first embossing pattern and the second embossing pattern is 1-2 mm, so that the embossed paper can better lock moisture after absorbing water, further improving the comfort of use.

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

[0071] The layout of the first embossing units on the first embossing surface may be continuous or discontinuous and independent of each other. 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 main base layer is intersected 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, so that the main base layer is bonded at the paper edge of the main base layer, thereby preventing the paper sheets from separating at the edge.

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

[0074] The second embossed surface includes a second base layer 103 and a plurality of second embossed units 151, and the plurality of second embossed units are evenly spaced and arranged. The second embossed units are arranged to optimize water absorption performance, touch and softness at the same time, so as to obtain better quality daily paper. The second base layer is connected and arranged on the lower surface of the main base layer, and the second embossed units are connected and arranged on the lower surface of the second base layer. The second embossed units include a plurality of dot embossings (not numbered in the figure), and the plurality of dot embossings form a second indentation 1510 on the second embossed surface. The second indentation is arranged to protrude upward from the lower surface of the second base layer, and is arranged to protrude upward in the main base layer, and the longitudinal section of the second indentation is hollow and protrudes upward; the protruding groove formed by the dot embossing increases the surface area of ​​the paper, provides more water storage space for water, and improves the hygroscopicity of the paper. At the same time, the paper is made to fluctuate in the thickness direction, which increases the bulk and softness of the paper.

[0075] The second indentations are arranged in an array on the second embossed surface. The dot embossing allows air to gather in the uncompacted part to form small bubbles, which increases the fluffiness of the paper and makes the paper feel softer and more comfortable. The embossed surface is rougher, which can increase friction and adhesion. Through linear embossing, a structure similar to mortise and tenon joints can be formed on the surface of the paper, with the concave and convex surfaces nested with each other, making the paper more compact and not easy to loosen, and not easy to break when exposed to water.

[0076] The height of the sinusoidal line embossing of the first embossing pattern is 0.8-1.2 mm, and the distance between two sinusoidal line embossings 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 embossing on the first embossed surface and the second embossed surface is 20 to 50 dots / cm 2 The height of the dot embossing is 0.8-1.0 mm.

[0079] All the dot-shaped embossings on the first embossing surface and the second embossing surface are truncated cone protrusions, and the tops of the dot-shaped embossed cones are provided with rounded corners.

[0080] The bottom diameter of the dot-shaped embossed cone is 0.5-1.2 mm, the top diameter of the cone is 0.4-1.0 mm, and the fillet radius of the top of the cone is 0.1-0.5 mm.

[0081] Related detection of the present invention:

[0082] Comparative Examples 1-3 in Table 1 have the same structure as Example 1 except that the embossed surface layer (i.e., the first embossed surface 1001), the embossed core layer (i.e., the main body base layer 102), and the embossed bottom layer (i.e., the second embossed surface 1002) are different.

[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. Tissue paper is usually made of multiple layers of paper. The contact area between these layers may be increased by embossing or other methods to improve water absorption. When the embossed paper passes through liquid, the sinusoidal line embossing will quickly transport the liquid, so that the liquid is quickly distributed into the paper and stored in the dot-shaped and broken line embossed patterns. The embossed surface layer and the embossed core layer are in contact and support with each other through the raised structure, and the embossed core layer and the embossed bottom layer are in contact and support with each other through the raised structure. With the core layer as the dividing line, the upper and lower layers of raised units are evenly distributed with symmetrical three-dimensional water-locking spaces. The raised structure can effectively maintain the stability of the overall structure of the tissue paper, and enhance the stability of the paper structure while increasing the water storage capacity.

[0085] Table 1

[0086]

[0087]

[0088] 2. As can be seen from Table 1, the water absorption amount and water absorption rate of Example 1 of the present invention are much higher than those of Comparative Examples 1 and 2. The mass of Example 1 after water absorption is higher than the water absorption amount of any two layers combined, and the total mass of the two-layer paper web after water absorption is increased by about 50% or more, and the water absorption amount (g / g) is also increased by more than 20%; in addition, the water absorption rate of the embodiments is higher than the water absorption rate measured by the combination of any two layers of paper webs, and the improvement range is 16.1% to 25.1%. By comparing the performance of the three-layer structure paper with the performance of the double-layer structure paper, it is obvious that the three-layer embossed household paper structure disclosed in the present invention: the embossed surface layer, the embossed core layer and the embossed bottom layer can play a good synergistic role, especially the embossed core layer and the embossed surface layer have a significant synergistic effect, which can greatly synergistically improve the total water absorption, water absorption rate and water absorption of the household paper. The increase in the water absorption performance of the household paper can enable the household paper to absorb a large amount of water in a short time to meet consumer needs. In addition, the wet tensile strength, wet tensile strength and wet tear strength of the tissue paper sample in Example 1 are all higher than those in Comparative Examples 1 and 2, which indicates that the three-layer structure of the tissue paper involved in the present invention has excellent synergy, especially the embossed core layer and the embossed surface layer have significant synergy, which can not only greatly improve the water absorption performance of the tissue paper, but also improve the mechanical properties of the tissue paper in a wet state, and improve the use experience of high-end consumers. This synergy between the high water absorption performance and high mechanical performance tissue paper and the three-layer structure is inseparable, which fully proves the advantages and innovation of the present invention.

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

Claims

1. An embossed tissue paper having an embossed pattern for improving the absorption, softness and strength of the tissue paper, characterized in that: The household paper comprises a main body base, a first embossed surface and a second embossed surface, wherein the first embossed surface, the main body base and the second embossed surface are sequentially connected from top to bottom in a vertical direction, and the first embossed surface, the main body base and the second embossed surface are all arranged in a horizontal direction; The main body base layer is provided with at least one layer, and two or more main body base layers are connected and provided together layer by layer from top to bottom; The first embossed surface comprises a first base layer, a plurality of first embossing units and broken line embossing, the first base layer is arranged in the horizontal direction, and the first embossing units and the broken line embossing are both arranged on the upper surface of the first base layer; the first embossing units and the broken line embossing are both arranged in the longitudinal direction, a plurality of first embossing units are evenly spaced and arranged in the horizontal direction, a broken line embossing is arranged between two adjacent first embossing units, and the longitudinal center of the broken line embossing is equal to the horizontal distance between the two adjacent first embossing units; The broken line embossing comprises a plurality of line embossings, and the plurality of line embossings are evenly spaced and arranged in the longitudinal direction; The first embossing unit comprises a first embossing pattern group and a second embossing pattern, the first embossing pattern group and the second embossing pattern are both arranged in the longitudinal direction, the second embossing pattern comprises two sinusoidal linear embossing patterns symmetrically arranged in the horizontal direction, the first embossing pattern group is arranged between the two sinusoidal linear embossing patterns, and the longitudinal center of the first embossing pattern group is equal to the horizontal distance between the two adjacent sinusoidal linear embossing patterns; the first embossing pattern group and the second embossing pattern have different shapes and areas; The first embossing pattern group includes a plurality of first embossing patterns, and the plurality of first embossing patterns are evenly spaced and arranged in the longitudinal direction, and the first embossing pattern includes a plurality of dot embossings distributed in a circumferential array.

2. The embossed household paper according to claim 1, characterized in that: The linear embossing and sinusoidal linear embossing are both recessed downward from the upper surface of the first base layer, and are recessed downward in the main base layer below the linear embossing and sinusoidal linear embossing. The linear embossing and sinusoidal linear embossing are hollow and recessed downward.

3. The embossed household paper according to claim 2, characterized in that: The linear embossing and sinusoidal linear embossing may appear as point indentations or line indentations on the first base layer. When the aspect ratio of the linear embossing is less than or equal to 5, it appears as point indentations; when the aspect ratio of the linear embossing is greater than or equal to 5, it appears as line indentations.

4. The embossed household paper according to claim 1, characterized in that: The area of ​​the first embossed pattern is 0.3-8 cm 2 The area of ​​the second embossed pattern is 0.1-2 cm 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 embossed pattern and the second embossed pattern is 0.5-6mm 2 The spacing between the first indentations formed by the first embossing pattern and the second embossing pattern is 0.5-3 mm.

5. The embossed household 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; Alternatively, the layout of the first embossing units on the first embossing surface is continuous or discontinuous and independent of each other.

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

7. The embossed household paper according to claim 1, characterized in that: The second embossed surface includes a second base layer and a plurality of second embossing units, the plurality of second embossing units are evenly spaced and arranged, the second base layer is connected and arranged on the lower surface of the main base layer, the second embossing units are connected and arranged on the lower surface of the second base layer, the second embossing units include a plurality of point embossings, the plurality of point embossings form a second indentation on the second embossed surface, the second indentation is protruded upward from the lower surface of the second base layer, and is protruded upward in the main base layer, and the longitudinal section of the second indentation is hollow and protrudes upward in the shape of a convex groove.

8. The embossed household paper according to claim 7, characterized in that: The second indentations are arranged in an array on the second embossed surface.

9. The embossed household paper according to any one of claims 1 to 8, characterized in that: The height of the sinusoidal line embossing of the first embossing pattern is 0.8-1.2 mm, and the distance between two sinusoidal line embossings is 0.5-0.8 mm; Alternatively, the height of the linear embossing is 0.8 to 1.2 mm, and the diameter of the linear embossing is 0.5 to 0.8 mm. Alternatively, the density of all dot embossing on the first embossed surface and the second embossed surface is 20 to 50 dots / cm 2 The height of the dot embossing is 0.8-1.0 mm. Alternatively, all the dot-shaped embossings on the first embossing surface and the second embossing surface are truncated cone protrusions, and the tops of the dot-shaped embossed cones are provided with rounded corners.

10. The embossed household paper according to claim 9, characterized in that: The bottom diameter of the dot-shaped embossed cone is 0.5-1.2 mm, the top diameter of the cone is 0.4-1.0 mm, and the fillet radius of the top of the cone is 0.1-0.5 mm.

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