Embossed tissue paper having high softness and high strength properties

Abstract

The present application belongs to the technical field of daily necessities, and discloses an embossed daily use paper with high softness and high strength, which 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 and arranged from top to bottom along the vertical direction, and all of them are arranged along the horizontal direction. The areas of the first embossed pattern and the second embossed pattern are different. The embossed daily use paper can simultaneously consider the hygroscopicity, softness and strength performance. Through the design of linear embossing and dot embossing, the porosity and surface area of the paper are increased, the water absorption is improved, and the paper can quickly absorb and diffuse liquid.

Description

Technical Field

[0001] This invention belongs to the field of daily necessities technology, and in particular to an embossed household paper with high softness and high strength. Background Technology

[0002] As living standards improve, people are paying more attention to the quality of household paper. The most important indicators for household paper are absorbency, softness, and strength. Existing embossing techniques often fail to adequately meet these requirements. Conventional embossing patterns are relatively simple, and the depth and density of the embossing are not appropriately balanced. Excessive embossing reduces the number of capillaries on the paper surface, hindering rapid water penetration and potentially damaging the fiber structure, thus weakening the paper's absorbency and strength. On the other hand, excessively high embossing density results in overly dense fiber arrangement within the paper, restricting effective water diffusion and reducing the paper's softness. This series of problems directly leads to a slower diffusion rate of liquid within the paper, hindering rapid water absorption and significantly reducing paper strength. After absorbing water, such paper is highly prone to tearing, severely impacting the consumer experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an embossed tissue paper with high softness and high strength.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A type of embossed tissue paper with high softness and high strength, 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 both arranged in the horizontal direction;

[0006] 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;

[0007] The first embossed surface includes a first base layer and one or more first embossed groups. The first embossed groups are disposed on the upper surface of the first base layer, and the lower surface of the first base layer is connected to and disposed on the upper surface of the body base layer. The first embossed group includes a first embossed unit, a first embossed pattern, a linear embossing, and a second embossed pattern. The first embossed unit is hexagonal, and there are six first embossed patterns. The first embossed pattern is disposed at the vertex of the hexagonal first embossed unit; the second embossed pattern is disposed at the center of the hexagonal first embossed unit.

[0008] The linear embossing includes a first linear embossing and a second linear embossing. Two adjacent first embossed patterns are connected by the second linear embossing, and the center of the second embossed pattern and the first embossed pattern are connected by the first linear embossing.

[0009] The first embossed pattern and the second embossed pattern are set to have different sizes;

[0010] Two or more first embossed groups are evenly spaced or continuously interlaced and connected.

[0011] Furthermore, the linear embossing is recessed downward from the upper surface of the first base layer and is recessed downward within the main body base layer below the linear embossing. The linear embossing is a hollow, downwardly recessed groove.

[0012] Furthermore, the linear embossing appears as either dot-shaped indentations or linear indentations on the first embossing surface. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it appears as dot-shaped indentations; when the aspect ratio of the linear embossing is greater than or equal to 5, it appears as linear indentations.

[0013] Furthermore, both the first embossed pattern and the second embossed pattern include a first dot-shaped indentation, which is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing.

[0014] The first embossed pattern also includes a circular linear first embossing and a plurality of first dot-shaped embossings. The plurality of first dot-shaped embossings are evenly distributed and spaced on the first base layer within the circular linear first embossing. The circular linear first embossing is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing. The circular linear first embossing is circular, and the longitudinal section of the circular linear first embossing is a hollow and downwardly recessed groove.

[0015] The second embossed pattern includes a plurality of first dot-shaped indentations, which are evenly distributed and spaced apart, and form a circular shape. The area of ​​the second embossed pattern is larger than the area of ​​the first embossed pattern.

[0016] Furthermore, the area of ​​the first embossed pattern is 0.7-8 cm². 2 Preferably 1-6cm 2 The area of ​​the second embossed pattern is 1-10cm. 2 Preferably 2-8cm 2 Meanwhile, the area of ​​the first embossed pattern is 30%-70% of the area of ​​the second embossed pattern;

[0017] Furthermore, the area 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%;

[0018] Alternatively, the first indentation on the first embossed surface is pressed together with the base layer and the second embossed surface by a pressure of 0.1-0.6 MPa, preferably 0.2-0.4 MPa.

[0019] Furthermore, the height of the first circular linear indentation of the first embossed pattern is 0.8–1.2 mm, the diameter of the first circular linear indentation is 1.0–1.5 mm, the density of all dot-shaped embossing on the first and second embossed surfaces is 20–60 dots / cm², and the height of the dot-shaped embossing is 0.6–1.0 mm.

[0020] Alternatively, all the 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;

[0021] Alternatively, the bottom diameter of the dotted embossed frustum is 1.0–1.4 mm, the top diameter of the frustum is 0.8–1.2 mm, and the radius of the rounded corner at the top of the frustum is 0.1–0.5 mm.

[0022] 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.

[0023] Furthermore, the first base layer is fiber paper made from various cellulose fibers through wet or dry processes; in order to ensure the softness of the tissue paper, virgin wood pulp fiber was selected as the raw material for tissue paper making. According to the fiber characteristics, long fibers and short fibers are processed separately by pulping process, and the amount of short fibers is increased, with the proportion reaching 85% of the overall paper weight.

[0024] The advantages and positive effects of this invention are as follows:

[0025] 1. The embossed tissue paper of this invention can simultaneously achieve good absorbency, softness, and strength. Through the design of linear and dotted embossing, the porosity and surface area of ​​the paper are increased, thereby improving water absorption and enabling the paper to quickly absorb and diffuse liquids.

[0026] 2. The embossed tissue paper of the present invention includes a body, the tissue paper body includes a first embossed surface and a second embossed surface, the first embossed pattern and the second embossed pattern improve the tactile feel and water retention performance of the tissue paper, the linear 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.

[0027] 3. The design of the embossing pattern and embossing 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.

[0028] 4. The linear embossing of this invention not only beautifies the paper surface but also guides liquid to spread rapidly along the linear area. The tiny recessed areas formed by the dotted embossing provide ample water storage space for the liquid, further improving the paper's water absorption and moisture absorption efficiency.

[0029] 5. The different area designs of the first and second embossed patterns in this invention, as well as the combination of linear embossing and dotted embossing, achieve the best balance between tactile feel and water retention performance, and avoid paper hardening caused by excessive embossing. Attached Figure Description

[0030] Figure 1 This is a schematic front view of a structural connection of the first embossed surface of the embossed tissue paper in this invention;

[0031] Figure 2 This is a rear view schematic diagram of the second embossed surface of the embossed household paper in this invention;

[0032] Figure 3 for Figure 1 Cross-sectional view of the structural connection in the AA direction. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments. The following embodiments are descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0034] The various experimental operations involved in the specific embodiments are all conventional techniques in the field. For parts not specifically annotated in this document, those skilled in the art can refer to various commonly used reference books, scientific and technological documents or related instructions and manuals prior to the filing date of this invention to carry out the operations.

[0035] An embossed tissue paper with high softness and high strength, such as Figures 1 to 3As 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.

[0036] 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.

[0037] The first embossed surface includes a first base layer 101 and one or more first embossed groups. The first embossed groups are disposed on the upper surface of the first base layer, and the lower surface of the first base layer is connected to the upper surface of the body base layer. The first embossed group includes a first embossed unit 1003, a first embossed pattern 11, a linear embossing, and a second embossed pattern 12. The first embossed unit is hexagonal, and there are six first embossed patterns. The first embossed patterns are disposed at the vertices of the hexagonal first embossed unit. The second embossed pattern is disposed at the center of the hexagonal first embossed unit, thereby improving the hydrophobicity of the paper.

[0038] The linear embossing includes a first linear embossing 13 and a second linear embossing 14. Two adjacent first embossed patterns are connected by the second linear embossing. The center of the second embossed pattern and the first embossed pattern are connected by the first linear embossing, thereby improving the flexibility of the paper.

[0039] The first embossed pattern and the second embossed pattern are set to different sizes to achieve different tactile feel and water storage performance;

[0040] Two or more first embossed groups are evenly spaced or continuously interleaved. For example, if there are multiple first embossed groups that are continuous, and adjacent first embossed units share the same first embossed pattern.

[0041] This tissue paper includes a base layer, a first embossed surface, and a second embossed surface. The first linear embossing divides the hexagon and the second embossed pattern into six equal parts. The arrangement of the linear embossing enables the rapid diffusion of liquid on the paper surface. The first linear embossing connects the center of the hexagon with the first embossed pattern, and the linear embossing connects adjacent first embossed patterns.

[0042] 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.

[0043] 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.

[0044] In this embodiment, the linear embossing is recessed downwards from the upper surface of the first base layer and is also recessed within the main body base layer below the linear embossing. The linear embossing is a hollow, downwardly recessed groove 1004. The greater embossing depth enhances the paper's compactness and prevents the paper from disintegrating during use. Preferably, the linear embossing can appear as either dot-like or linear indentations on the first embossing surface. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it appears 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 appears as linear indentations, highlighting the embossed pattern, enhancing its visual effect, and making the paper more aesthetically pleasing.

[0045] In this embodiment, both the first embossed pattern and the second embossed pattern include a first dot-shaped indentation 1005. The first dot-shaped indentation is recessed downward from the upper surface of the first base layer and is recessed downward in the body base layer below the linear embossing.

[0046] The first embossed pattern also includes a circular linear first embossing 1006 and a plurality of first dot-shaped embossings. The plurality of first dot-shaped embossings are evenly distributed and spaced apart on the first base layer within the circular linear first embossing. The circular linear first embossing is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing. The circular linear first embossing is circular, and the longitudinal section of the circular linear first embossing is a hollow and downwardly recessed groove.

[0047] The second embossed pattern includes multiple first dot-shaped indentations, which are evenly distributed and spaced apart, and form a circular shape. The area of ​​the second embossed pattern is larger than that of the first embossed pattern. This unevenness in embossing can maintain softness while avoiding paper hardening caused by excessive embossing, increasing tactile layers and enriching the user experience.

[0048] Preferably, the area of ​​the first embossed pattern is 0.7-8 cm². 2 Preferably 1-6cm 2 The area of ​​the second embossed pattern is 1-10cm. 2 Preferably 2-8cm 2 Meanwhile, the area of ​​the first embossed pattern is 30%-70% of the area of ​​the second embossed pattern. This unevenness of embossing can maintain softness while avoiding paper hardening caused by excessive embossing, adding a certain tactile layer and enriching the user experience.

[0049] Preferably, the area 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, and more preferably less than or equal to 60%, in order to reduce damage to the paper strength.

[0050] 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.

[0051] In this embodiment, the first indentation on the first embossed surface is pressed together with the body base and the second embossed surface by a pressure of 0.1-0.6 MPa, preferably 0.2-0.4 MPa, thereby connecting the first embossed surface and the second embossed surface at the edge of the body base and ensuring the connection stability of the tissue paper body.

[0052] 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.

[0053] Preferably, the height of the first circular linear indentation of the first embossed pattern is 0.8-1.2 mm, the diameter of the first circular linear indentation is 1.0-1.5 mm, the density of all dot-shaped embossing on the first and second embossed surfaces is 20-60 dots / cm2, and the height of the dot-shaped embossing is 0.6-1.0 mm.

[0054] Preferably, 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.

[0055] Preferably, the bottom diameter of the dot-shaped embossed frustum is 1.0 to 1.4 mm, the top diameter of the frustum is 0.8 to 1.2 mm, and the radius of the rounded corner at the top of the frustum is 0.1 to 0.5 mm.

[0056] The aforementioned embossed tissue paper with high softness and high strength is made from a mixture of bleached softwood sulfate pulp and bleached hardwood sulfate pulp, both of which are commonly used wood pulp fiber raw materials in this field. This paper is suitable for common applications in tissue paper, such as facial tissues, handkerchiefs, and toilet paper.

[0057] Example 1:

[0058] An embossed household paper with high softness and high strength is provided in Example 1, which has three base layers: the main base layer, the first embossed surface, and the second embossed surface. It is made by mixing bleached softwood sulfate pulp and bleached hardwood sulfate pulp.

[0059] Specifically:

[0060] An embossed tissue paper with high softness and high strength, such as Figures 1 to 3As 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.

[0061] 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.

[0062] The first embossed surface includes a first base layer 101 and a plurality of first embossed groups. The first embossed groups are disposed on the upper surface of the first base layer, and the lower surface of the first base layer is connected to and disposed on the upper surface of the body base layer. The first embossed group includes a first embossed unit 1003, a first embossed pattern 11, a linear embossing, and a second embossed pattern 12. The first embossed unit is hexagonal, and there are six first embossed patterns. The first embossed patterns are disposed at the vertices of the hexagonal first embossed unit; the second embossed pattern is disposed at the center of the hexagonal first embossed unit, thereby improving the hydrophobicity of the paper.

[0063] The linear embossing includes a first linear embossing 13 and a second linear embossing 14. Two adjacent first embossed patterns are connected by the second linear embossing. The center of the second embossed pattern and the first embossed pattern are connected by the first linear embossing, thereby improving the flexibility of the paper.

[0064] The first embossed pattern and the second embossed pattern are set to different sizes to achieve different tactile feel and water storage performance;

[0065] Two or more first embossed groups are evenly spaced or continuously interlaced and connected.

[0066] The linear embossing is recessed downwards from the upper surface of the first base layer and is located within the main body base layer below it. The linear embossing is a hollow, downwardly recessed groove 1004. The greater embossing depth enhances the paper's compactness and prevents it from disintegrating during use. Preferably, the linear embossing can appear as either dot-like or linear indentations on the first embossing surface. Specifically, when the aspect ratio of the linear embossing is less than or equal to 5, it appears as dot-like indentations, making the paper surface uneven and increasing its bulk, thereby enhancing its absorbency and softness. When the aspect ratio of the linear embossing is greater than or equal to 5, it appears as linear indentations, highlighting the embossed pattern and enhancing its visual effect, making the paper more aesthetically pleasing.

[0067] Both the first embossed pattern and the second embossed pattern include a first dot-shaped indentation 1005, which is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing.

[0068] The first embossed pattern also includes a circular linear first embossing 1006 and a plurality of first dot-shaped embossings. The plurality of first dot-shaped embossings are evenly distributed and spaced apart on the first base layer within the circular linear first embossing. The circular linear first embossing is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing. The circular linear first embossing is circular, and the longitudinal section of the circular linear first embossing is a hollow and downwardly recessed groove.

[0069] The second embossed pattern includes multiple first dot-shaped indentations, which are evenly distributed and spaced apart, and form a circular shape. The area of ​​the second embossed pattern is larger than that of the first embossed pattern. This unevenness in embossing can maintain softness while avoiding paper hardening caused by excessive embossing, increasing tactile layers and enriching the user experience.

[0070] The area of ​​the first embossed pattern is 1-6 cm. 2 The area of ​​the second embossed pattern is 2-8cm. 2 Meanwhile, the area of ​​the first embossed pattern is 30%-70% of the area of ​​the second embossed pattern. This unevenness of embossing can maintain softness while avoiding paper hardening caused by excessive embossing, adding a certain tactile layer and enriching the user experience.

[0071] The area 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.

[0072] The second embossed surface includes a second base layer 103 and multiple second embossed units 151. These units are evenly distributed and spaced apart. The inclusion of these second embossed 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 embossed units are also connected to the lower surface of the second base layer. Each second embossed 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.

[0073] The first indentation on the first embossed surface is pressed together with the base layer and the second embossed surface by a pressure of 0.2-0.4 MPa, thereby connecting the first embossed surface and the second embossed surface at the edge of the base layer and ensuring the connection stability of the tissue paper body.

[0074] The height of the first circular linear indentation of the first embossed pattern is 0.8–1.2 mm, the diameter of the first circular linear indentation is 1.0–1.5 mm, the density of all dot-shaped embossing on the first and second embossed surfaces is 20–60 dots / cm², and the height of the dot-shaped embossing is 0.6–1.0 mm.

[0075] 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.

[0076] The bottom diameter of the dotted embossed frustum is 1.0–1.4 mm, the top diameter of the frustum is 0.8–1.2 mm, and the radius of the rounded corner at the top of the frustum is 0.1–0.5 mm.

[0077] Comparative Example 1 is a common type of embossed household paper available on the market.

[0078] Comparative Example 2 reduced the area of ​​the first and second embossed patterns by 30% compared to Example 1. All other experimental conditions in Comparative Example 2 were the same as in Example 1.

[0079] Comparative Example 3 increased the area of ​​the first and second embossed patterns by 30% compared to Example 1. All other experimental conditions in Comparative Example 3 were the same as in Example 1.

[0080] The relevant tests for this invention are shown in Table 1:

[0081] Table 1:

[0082]

[0083] As can be seen from the table above, Example 1 is superior to a certain embossed household paper on the market in terms of moisture absorption, softness and strength. The water absorption is increased by 9.74%, the water absorption rate is increased by 9.09%, the softness is improved by 17%, and the strength of Example 1 is also significantly better than that of Comparative Example 1.

[0084] In Comparative Example 2, after the embossed area was reduced, its moisture absorption and softness were lower than those of Example 1, while its strength remained essentially unchanged. In Comparative Example 3, after the embossed area was increased, its water absorption was slightly higher than that of Example 1, but its softness and tensile strength were lower than those of Example 1. Therefore, it can be seen that the embossed tissue paper obtained in Example 1 of this invention can simultaneously achieve good moisture absorption, softness, and strength, improving the consumer experience. It can also be seen that the area of ​​the first embossed pattern in the embossed tissue paper of this invention is 1-6 cm². 2 The area of ​​the second embossed pattern is 2-8cm. 2 The two have a synergistic effect, which can synergistically improve the relevant indicators such as the moisture absorption, softness and strength of the embossed household paper of the present invention.

[0085] Comparative Example 4 reduced the height of the dotted embossing on the first embossed surface by 30% compared to Example 1. The other experimental conditions for Comparative Example 4 were the same as those for Example 1.

[0086] Comparative Example 5 increased the height of the dotted embossing on the first embossed surface by 30% compared to Example 1. The remaining experimental conditions for Comparative Example 5 were the same as those for Example 1.

[0087] The relevant tests for this invention are shown in Table 2:

[0088] Table 2:

[0089] Water absorption (g / g) 4.472 3.75 3.527 Water absorption rate (mm / 100s) 45.6 40.2 37.8 Softness (TS7) 29.5 37.2 35.4 Longitudinal tensile index (N·m / g) 57.9 59.8 47.9 Transverse tensile index (N·m / g) 28.02 29.2 23.7 Longitudinal wet tensile index (N·m / g) 5.38 5.69 4.62 Transverse wet tensile index (N·m / g) 2.09 2.23 1.84

[0090] As shown in Table 2, the moisture absorption performance of Example 1 is higher than that of Comparative Examples 4 and 5. The water absorption of Example 1 is increased by 19.2% and 26.7% compared to Comparative Examples 4 and 5, respectively, and the water absorption rate is increased by 13.4% and 20.6%. Regarding softness and strength, Comparative Example 4 has slightly higher tensile strength than Example 1, but its softness is much lower; Comparative Example 5 has lower softness and strength than Example 1. Therefore, the embossed tissue paper obtained in Example 1 significantly enhances the paper's moisture absorption and softness while effectively reducing the impact of the embossing process on the paper's strength. Furthermore, comparing Example 1 and Comparative Examples 2-5 also shows that the area of ​​the first embossed pattern in the embossed tissue paper of this invention is 1-6 cm². 2 The area of ​​the second embossed pattern is 2-8cm. 2 The height of the dotted embossing on the first embossed surface is 0.6-1.0 mm. The two have a synergistic effect, which can synergistically improve the relevant indicators of the embossed tissue paper of the present invention, such as moisture absorption, softness and strength.

[0091] 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 high softness and high strength, 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 and two or more first embossed groups. The first embossed groups are disposed on the upper surface of the first base layer, and the lower surface of the first base layer is connected to and disposed on the upper surface of the main body base layer. The first embossed group includes a first embossed unit, a first embossed pattern, a linear embossing, and a second embossed pattern. The first embossed unit is hexagonal, and there are six first embossed patterns. The first embossed pattern is disposed at the vertex of the hexagonal first embossed unit; the second embossed pattern is disposed at the center of the hexagonal first embossed unit. The linear embossing includes a first linear embossing and a second linear embossing. Two adjacent first embossed patterns are connected by the second linear embossing, and the center of the second embossed pattern and the first embossed pattern are connected by the first linear embossing. The first embossed pattern and the second embossed pattern are set to have different sizes; Two or more first embossing groups are evenly spaced or continuously interlaced and connected; The linear embossing is recessed downward from the upper surface of the first base layer and is recessed downward within the main body base layer below the linear embossing. The linear embossing is a hollow, downward recessed groove. Both the first embossed pattern and the second embossed pattern include a first dot-shaped indentation. The first dot-shaped indentation is recessed downward from the upper surface of the first base layer and is recessed downward within the body base layer below the linear embossing. The first embossed pattern also includes a circular linear first embossing and a plurality of first dot-shaped embossings. The plurality of first dot-shaped embossings are evenly distributed and spaced on the first base layer within the circular linear first embossing. The circular linear first embossing is recessed downward from the upper surface of the first base layer and recessed downward within the body base layer below the linear embossing. The circular linear first embossing is circular, and the longitudinal section of the circular linear first embossing is a hollow and downwardly recessed groove. The second embossed pattern includes a plurality of first dot-shaped indentations, which are evenly distributed and spaced apart, and the plurality of first dot-shaped indentations form a circular shape, and the area of ​​the second embossed pattern is larger than the area of ​​the first embossed pattern. 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 first base layer is a fiber paper made of various cellulose fibers through wet or dry processes; The area of ​​the first embossed pattern is 1-6 cm². 2 The area of ​​the second embossed pattern is 2-8cm. 2 Meanwhile, the area of ​​the first embossed pattern is 30%-70% of the area of ​​the second embossed pattern.

2. The embossed household paper according to claim 1, characterized in that: The linear embossing appears as either dot-shaped or linear indentations on the first embossed surface.

3. The embossed household paper according to claim 1, characterized in that: The area 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; Alternatively, the first indentation on the first embossed surface is pressed together with the base layer and the second embossed surface by a pressure of 0.1-0.6 MPa.

4. The embossed household paper according to claim 3, characterized in that: The area of ​​the first embossed pattern, the second embossed pattern, and the linear embossed pattern is less than or equal to 60% of the area of ​​the first embossed unit; Alternatively, the first indentation on the first embossed surface is pressed together with the base layer and the second embossed surface by a pressure of 0.2-0.4 MPa.

5. The embossed household paper according to claim 1, characterized in that: The height of the first circular linear indentation in the first embossed pattern is 0.8~1.2 mm, and the diameter of the first circular linear indentation is 1.0~1.5 mm. The density of all dot-shaped embossing on the first and second embossed surfaces is 20~60 dots / cm2, and the height of the dot-shaped embossing is 0.6-1.0 mm. Alternatively, all the 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; Alternatively, the bottom diameter of the dotted embossed frustum is 1.0~1.4 mm, the top diameter of the frustum is 0.8~1.2 mm, and the radius of the rounded corner at the top of the frustum is 0.1~0.5 mm.

6. The embossed household paper according to any one of claims 1 to 5, characterized in that: The first base layer is fiber paper made from various cellulose fibers through wet or dry processes. In order to ensure the softness of the tissue paper, virgin wood pulp fiber was selected as the raw material for tissue paper making. According to the fiber characteristics, long fibers and short fibers are processed separately by pulping process, and the amount of short fibers is increased, with the proportion reaching 85% of the overall paper weight.

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