Paper towel and method for manufacturing the same

Abstract

A tissue and a fabrication method therefor, comprising a first embossed layer (10), a second embossed layer (20) and a third embossed layer (30). The first embossed layer (10) and the second embossed layer (20) are compositely coated with a binding agent (40) by means of a roller; the first embossed layer (10) and the second embossed layer (20) that is extruded by a bushing and coated with the binding agent (40) are bound to the third embossed layer (30). The first embossed layer (10) is embossed with first embossed layer low bulges (11) and first embossed layer high bulges (12), and the second embossed layer (20) is embossed with second embossed layer bulges (21) and second embossed layer bulges inter-planes (22). The density of the first embossed layer low bulges (11) is greater than the density of the second embossed layer bulges (21). A part of the first embossed layer low bulges (11) is supported by the second embossed layer bulges (21), and a part of the first embossed layer low bulges (11) is supported by the second embossed layer bulges inter-planes (22).

Description

A paper towel and its manufacturing method

[0001] This application claims priority to Chinese Patent Application No. 201910760175.5, filed on August 16, 2019, entitled "A Tissue Paper and a Method for Manufacturing It", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to a paper towel and its manufacturing method, specifically a method for manufacturing a multi-layered product. Background Technology

[0003] Paper towels are generally made from natural and pollution-free raw materials such as wood pulp, bamboo pulp, cotton pulp, and straw pulp. According to their uses, they include paper face towels, paper napkins, paper handkerchiefs, wet wipes, hand towels, and kitchen paper towels. According to their structure, paper towels can be divided into single-layer, double-layer, and multi-layer. Multi-layer paper towels are prone to peeling apart during the extraction process. In order to change the separation of the paper, embossing is used to bond the layers of paper together. The embossing process also affects the physical properties of paper towels, such as thickness, feel (surface softness), and absorbency (fluffy softness). The embossing process has become a key link in papermaking technology that affects the performance of paper towels.

[0004] Currently, the structure of embossed toilet paper on the market mainly consists of an embossing process and the bonding of the embossed toilet paper (embossed composite structure). Existing embossed toilet paper is mainly based on two-path embossing, while the known and publicly available three-path embossed toilet paper is limited by the process, so the existing three-path embossed structure products do not have a significant advantage over two-path embossed products.

[0005] CN201510439764.5 Method for producing multi-layer embossed toilet paper rolls: Unwinding the base paper: Unwinding the base paper to be embossed; Fine embossing of the surface layer: Passing one or more layers of surface base paper to the upper fine embossing roller for fine embossing to obtain fine embossed paper; Coarse embossing of the surface and core layers: Combining the obtained fine embossed paper with one layer of core base paper and passing it to the coarse embossing roller for coarse embossing to obtain coarse embossed paper; Applying a binder: Passing the obtained coarse embossed paper to the binder-applying water rubber roller and the coarse embossing steel roller. The roller pair forms a bonded coarse embossed paper core layer side concave surface to obtain glued coarse embossed paper; bottom fine embossing: a bottom layer of base paper is drawn to the lower fine embossing roller pair to press fine embossing to obtain bottom fine embossed paper; rewinding and packaging: the obtained glued coarse embossed paper and the obtained bottom fine embossed paper are rewound, the coarse embossed concave surface of the glued coarse embossed paper and the concave surface of the bottom fine embossed paper are bonded together during the rewinding process, and packaged to obtain multi-layer embossed toilet paper with the top convex surface and the bottom convex surface both set opposite each other.

[0006] While the above solution achieves three-path embossing of the top, core, and bottom layers, technological limitations mean that existing three-path embossed products offer no significant advantage over two-path embossed products. The top layer, due to the two embossing processes, experiences significant stretching and breakage at the fiber bonding points, resulting in low strength and easy disintegration when wet, leading to a decreased user experience. Furthermore, the combined structure of the top and core layers after the two embossing processes does not significantly improve the product's thickness, and the changes in absorbency and feel are minimal.

[0007] Summary of the Invention

[0008] In view of this, the present invention provides a paper towel and a method for manufacturing the same, in order to solve the problems existing in the prior art.

[0009] This invention provides a paper towel, comprising a first embossed layer, a second embossed layer, and a third embossed layer;

[0010] The first embossed layer has a first embossed layer low protrusion and a first embossed layer high protrusion; the first embossed layer low protrusion includes a first embossed layer low protrusion width and a first embossed layer low protrusion height; the first embossed layer high protrusion includes a first embossed layer high protrusion width and a first embossed layer high protrusion height.

[0011] The second embossed layer has a second embossed layer protrusion and a plane between the second embossed layer protrusion; the second embossed layer protrusion includes a second embossed layer protrusion width and a second embossed layer protrusion height; the plane between the second embossed layer protrusions has a second embossed layer protrusion plane width.

[0012] The third embossed layer has embossed protrusions and a plane between the protrusions; the protrusions of the third embossed layer include the width of the protrusions and the height of the protrusions.

[0013] The height of the first embossed layer protrusion is greater than the height of the second embossed layer protrusion; the height of the second embossed layer protrusion is greater than or equal to the height of the third embossed layer protrusion.

[0014] The width of the low protrusion of the first embossed layer is less than or equal to the width of the protrusion of the second embossed layer or the plane width between the protrusions of the second embossed layer;

[0015] The density of the low-relief areas in the first embossed layer is greater than the density of the relief areas in the second embossed layer;

[0016] During the roller bonding process of the first embossed layer and the second embossed layer, the high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and fitted together and coated with a binder; a portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer;

[0017] Alternatively, during the process of rolling the first embossed layer and the second embossed layer together, the plane between the high protrusions of the first embossed layer and the protrusions of the second embossed layer is extruded and fitted together and coated with a bonding agent; a portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer.

[0018] The first embossed layer and the second embossed layer, after being coated with a binder, are bonded to the third embossed layer by a roller.

[0019] Preferably, the first embossed layer and the second embossed layer after being coated with a binder are combined with the third embossed layer by a roller, and the protrusions of the first embossed layer and the second embossed layer are bonded to the protrusions of the third embossed layer by extrusion and bonding, and the protrusions of the third embossed layer and the second embossed layer are extruded and bonded to each other in a plane.

[0020] Preferably, the first embossed layer and the second embossed layer after being coated with a binder are combined with the third embossed layer by a roller. The plane between the protrusions of the first embossed layer and the protrusions of the second embossed layer, which are extruded and coated with a binder, is bonded to the plane between the protrusions of the third embossed layer. The protrusions of the third embossed layer and the protrusions of the second embossed layer are extruded and fitted together.

[0021] Preferably, the first embossed layer, the second embossed layer, and the third embossed layer are all one, two, or multiple layers.

[0022] Preferably, the low protrusions of the first embossed layer are pressure points; the high protrusions of the first embossed layer are a combination of dot and line patterns.

[0023] Preferably, the second embossed layer protrusions are either a wave structure or are pressure points.

[0024] Preferably, the wave structure is a wrinkle, a wavy profile, or a wave-shaped profile.

[0025] Preferably, the binder is glue, water, or a natural extract. The binder may be colored, fragrant, or colorless and odorless.

[0026] This application also provides a method for manufacturing paper towels, which involves forming a first embossed layer, a second embossed layer, and a third embossed layer using an embossing roller;

[0027] The first embossed layer and the second embossed layer are coated with a binder by roller compounding. The high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and inlaid and coated with binder. A portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer, and a portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer.

[0028] The first embossed layer and the second embossed layer, which are extruded and coated with a binder, are bonded to the third embossed layer; the high protrusions of the first embossed layer and the protrusions of the second embossed layer are planarly bonded to the protrusions of the third embossed layer, and the protrusions of the third embossed layer and the protrusions of the second embossed layer are planarly extruded and bonded.

[0029] This application also provides a method for manufacturing paper towels, which involves forming a first embossed layer and a third embossed layer using an embossing roller;

[0030] The first embossed layer and the second embossed layer are coated with a binder by roller bonding. The high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and inlaid on the plane and coated with binder. A portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer. A portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer.

[0031] The first embossed layer and the second embossed layer, which are extruded and coated with a binder, are bonded to the third embossed layer; the plane between the protrusions of the first embossed layer and the protrusions of the second embossed layer is bonded to the plane between the protrusions of the third embossed layer, and the protrusions of the third embossed layer and the protrusions of the second embossed layer are extruded and bonded together.

[0032] In summary, this invention provides a tissue and its manufacturing method. By defining a three-layer embossed pattern, the high protrusions of the first embossed layer and the protrusions of the second embossed layer, or the planar extrusions between the protrusions of the second embossed layer, are interlocked and coated with an adhesive. During the lamination process of the first and second embossed layers, embossing marks from the high protrusions of the first embossed layer are left on the surface of the second embossed layer, and an adhesive is applied to these marks. After being pressed by a roller with a certain force, the marks are bonded together with the third embossed layer. Because the density of the low protrusions of the first embossed layer is greater than the density of the protrusions of the second embossed layer, a portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer. A portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer, maximizing the product thickness. Compared with the traditional three-layer embossing process, the product thickness is increased by about 52%. The first and third embossed layers are mainly composed of small embossed dots of a certain density, with a higher density of embossed dots than the second embossed layer, thus achieving a similar tactile feel. The high protrusions of the first embossed layer penetrate through the second and third embossed layers, ultimately bonding and locking the three different embossed layers together to form a solid three-dimensional structure, thereby significantly improving the physical properties of the tissue product, such as thickness, feel, and absorbency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 is a schematic diagram of the existing three-path embossing technique;

[0035] Figure 2 is a schematic diagram of the existing three-path embossing technique;

[0036] Figure 3 is a schematic diagram of the first embossed layer;

[0037] Figure 4 is a schematic diagram of the second embossed layer;

[0038] Figure 5 is a schematic diagram of the third embossed layer;

[0039] Figure 6 is a schematic diagram showing the breakdown of the first to third embossed layers;

[0040] Figure 7 is a schematic diagram of the composite of the first and second embossed layers;

[0041] Figure 8 is a schematic diagram of the composite of the first and second embossed layers and the third embossed layer;

[0042] Figure 9 is a schematic diagram of Example 1 of three-layer embossing;

[0043] Figure 10 is a schematic diagram of Example 2 of three-layer embossing;

[0044] Figure 11 is a schematic diagram of Example 3 of three-layer embossing;

[0045] In the diagram: 10. First embossed layer, 11. Low protrusion of the first embossed layer, d11. Width of the low protrusion of the first embossed layer, h11. Height of the low protrusion of the first embossed layer, 111. Left side of the low protrusion of the first embossed layer, 113. Right side of the low protrusion of the first embossed layer, 112. Bottom surface of the low protrusion of the first embossed layer, 12. High protrusion of the first embossed layer, d12. Width of the high protrusion of the first embossed layer, h12. Width of the high protrusion of the first embossed layer, 121. Left side of the high protrusion of the first embossed layer, 122. Right side of the high protrusion of the first embossed layer, 123. Bottom surface of the high protrusion of the first embossed layer, 13. Plane of the first embossed layer, 20. Second embossed layer, 21. Protrusion of the second embossed layer, d21. Second embossed layer raised width, h21. Second embossed layer raised height, 211. Second embossed layer raised left side, 212. Second embossed layer raised right side, 213. Second embossed layer raised bottom surface, 22. Second embossed layer raised plane, d22. Second embossed layer raised plane width, 23. Second embossed layer plane, 30. Third embossed layer, 31. Third embossed layer raised, 311. Third embossed layer raised left side, 312. Third embossed layer raised right side, 313. Third embossed layer raised bottom surface, d31. Third embossed layer raised width, h31. Third embossed layer raised height, 32. Third embossed layer raised plane, 33. Third embossed layer plane. Detailed Implementation

[0046] This invention provides a paper towel and its manufacturing method to solve the problems existing in the prior art.

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] To provide a more detailed description of the present invention, a paper towel and its manufacturing method provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Embossed layer plane refers to the plane of the tissue paper layer before embossing; embossed raised width refers to the width of the raised bottom surface formed after embossing the embossed layer plane; embossed raised height refers to the distance between the embossed layer plane and the raised bottom surface formed after embossing; embossed raised inter-plane refers to the unembossed embossed layer plane between the embossed raised areas.

[0050] As shown in Figure 8, a paper towel includes a first embossed layer 10, a second embossed layer 20, and a third embossed layer 30.

[0051] As shown in Figure 3, the first embossed layer 10 has a first embossed layer low protrusion 11, a first embossed layer high protrusion 12 and a first embossed layer plane 13.

[0052] The first embossed layer low protrusion 11 includes a first embossed layer low protrusion width d11 and a first embossed layer low protrusion height h11; the first embossed layer low protrusion width d11 refers to the width of the bottom surface of the protrusion formed after embossing, and the first embossed layer low protrusion height h11 refers to the distance between the embossed layer plane and the bottom surface of the protrusion formed after embossing; the first embossed layer low protrusion 11 is formed by the left side 111 and the right side 111 of the first embossed layer low protrusion. It consists of 3 and the bottom surface 112 of the first embossed layer; the low protrusion 11 of the first embossed layer can be used to improve the tactile feel of the embossing, and its height h11 is usually around 0.6 mm, and its width d11 is between 0.3 and 0.7 mm; the slope of the left side 111 and the right side 113 of the first embossed layer is about 25-35 degrees, and the density of the low protrusion 11 of the first embossed layer is generally 40-80 dots / cm³. 2 between.

[0053] The first embossed layer height protrusion 12 includes a first embossed layer height protrusion width d12 and a first embossed layer height protrusion height h12. The first embossed layer height protrusion 12 is composed of a first embossed layer height protrusion left side 121, a first embossed layer height protrusion right side 123, and a first embossed layer height protrusion bottom surface 122. The first embossed layer height protrusion 12 is a combination of decorative lines and dots. The width d12 of the first embossed layer height protrusion is generally between 0.4-1.6mm. The slope of the left side 121 and the right side 123 of the first embossed layer height protrusion is about 20-30 degrees. The height h12 of the first embossed layer height protrusion is 0.3-1mm higher than the height h11 of the first embossed layer height protrusion.

[0054] As shown in Figure 4, the second embossed layer 20 has a second embossed layer protrusion 21 and a plane 22 between the second embossed layer protrusions; the second embossed layer protrusion 21 includes a second embossed layer protrusion width d21 and a second embossed layer protrusion height h21; the second embossed layer protrusion 21 is composed of a left side 211, a right side 212, and a bottom surface 213; the plane 22 between the second embossed layer protrusions has a plane width d22; the width d21 of the second embossed layer protrusion is generally between 0.4-1.6 mm, and the slope of the left side 211 and the right side 212 of the second embossed layer protrusion is about 20-30 degrees; the density of the second embossed layer protrusion 21 is generally 10-60 points / cm³. 2 about;

[0055] As shown in Figure 5, the third embossed layer 30 has embossed protrusions 31, a plane 32 between the protrusions, and a plane 33. The protrusions 31 include a width d31 and a height h31. Each protrusion is composed of a left side 311, a right side 312, and a bottom surface 313. The height h31 is generally between 0.6 and 1.5 mm, the width d31 is generally between 0.3 and 1.6 mm, and the slope of the left side 311 and right side 312 is approximately 25-35 degrees. The density of the protrusions 31 is generally 30-80 dots / cm³. 2 about.

[0056] The height h12 of the first embossed layer is greater than the height h11 of the second embossed layer; the height h21 of the second embossed layer is greater than or equal to the height h31 of the third embossed layer; the first embossed layer height protrusion 12 on the first embossed layer 10 penetrates the second embossed layer 20 and the third embossed layer 30 to form discrete or continuous bonding points, ultimately bonding and locking the three different embossed layers together to form a solid three-dimensional structure;

[0057] The width d11 of the first embossed layer low protrusion is less than or equal to the width d21 of the second embossed layer protrusion or the width d22 of the plane between the protrusions of the second embossed layer. Since the density of the first embossed layer low protrusion 11 is greater than the density of the second embossed layer protrusion 21, a portion of the first embossed layer low protrusion 11 is supported by the second embossed layer protrusion 21, and a portion of the first embossed layer low protrusion 11 is supported by the plane 22 between the protrusions of the second embossed layer, forming discrete or continuous support points to maximize the product thickness. A portion of the second embossed layer protrusion 21 is supported by the third embossed layer protrusion 31, and a portion of the second embossed layer protrusion 21 is supported by the plane 32 between the protrusions of the third embossed layer.

[0058] During the roller bonding process of the first embossed layer 10 and the second embossed layer 20, the high protrusion 12 of the first embossed layer and the protrusion 21 of the second embossed layer are extruded and fitted together and coated with a binder; a portion of the low protrusion 11 of the first embossed layer is supported by the protrusion 21 of the second embossed layer.

[0059] Alternatively, during the roller bonding process of the first embossed layer 10 and the second embossed layer 20, the high protrusion 12 of the first embossed layer and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together and coated with a binder; a portion of the low protrusion 11 of the first embossed layer is supported by the plane 22 between the protrusions of the second embossed layer.

[0060] The first embossed layer 10 and the second embossed layer 20, after being coated with a binder, are combined with the third embossed layer 30 by a roller.

[0061] The first embossed layer 10 and the second embossed layer 20, after being coated with a binder, are combined with the third embossed layer 30 by a roller. The protrusions 12 of the first embossed layer and the protrusions 21 of the second embossed layer, which are extruded and coated with binder, are bonded to the plane 32 between the protrusions of the third embossed layer. The protrusions 31 of the third embossed layer and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together.

[0062] The first embossed layer 10 and the second embossed layer 20, after being coated with a binder, are combined with the third embossed layer 30 by a roller. The first embossed layer protrusion 12 and the second embossed layer protrusion plane 22, which are extruded and coated with binder, are bonded to the third embossed layer protrusion plane 32. The third embossed layer protrusion 31 is extruded and fitted with the second embossed layer protrusion 21.

[0063] The first embossed layer 10, the second embossed layer 20, and the third embossed layer 30 are all one, two, or multiple layers.

[0064] The first embossed layer has low protrusions 11 as pressure points; the first embossed layer has high protrusions 12 as a combination of dots and lines.

[0065] The second embossed layer protrusion 21 has a wave structure or the second embossed layer protrusion 21 has pressure points.

[0066] The wave structure is described as wrinkles, wavy outlines, or wave-like outlines.

[0067] The binder 40 is an adhesive, water, or a natural extract; the binder may have color or fragrance, or be colorless and odorless. The color, fragrance, or colorless and odorless nature of the binder can be added depending on the specific paper towel product.

[0068] This application also provides a method for manufacturing paper towels, which involves forming a first embossed layer 10, a second embossed layer 20, and a third embossed layer 30 using an embossing roller;

[0069] The first embossed layer 10 and the second embossed layer 20 are coated with a binder 40 by roller bonding. The high protrusions 12 of the first embossed layer and the protrusions 21 of the second embossed layer are extruded and fitted together and coated with binder 40. A portion of the low protrusions 11 of the first embossed layer are supported by the protrusions 21 of the second embossed layer, and a portion of the low protrusions 11 of the first embossed layer are supported by the plane 22 between the protrusions of the second embossed layer.

[0070] The first embossed layer 10 and the second embossed layer 20, which are extruded and coated with adhesive 40, are bonded to the third embossed layer 30; the high protrusion 12 of the first embossed layer and the protrusion 21 of the second embossed layer are bonded to the plane 32 between the protrusions of the third embossed layer, and the protrusion 31 of the third embossed layer and the plane 22 between the protrusions of the second embossed layer are extruded and fitted.

[0071] This application also provides a method for manufacturing paper towels, in which a first embossed layer 10 and a third embossed layer 30 are formed by an embossing roller; the second embossed layer 20 is an existing pre-formed product.

[0072] The first embossed layer 10 and the second embossed layer 20 are coated with a binder 40 by roller bonding. The high protrusions 12 of the first embossed layer and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together and coated with binder 40. Since the density of the low protrusions 11 of the first embossed layer is greater than the density of the protrusions 21 of the second embossed layer, a portion of the low protrusions 11 of the first embossed layer is supported by the plane 22 between the protrusions of the second embossed layer; a portion of the low protrusions 11 of the first embossed layer is supported by the protrusions 21 of the second embossed layer.

[0073] The first embossed layer 10 and the second embossed layer 20, which are extruded and coated with adhesive, are bonded to the third embossed layer 30; the plane 22 between the protrusions of the first embossed layer 12 and the protrusions of the second embossed layer is bonded to the plane 32 between the protrusions of the third embossed layer, and the protrusion 31 of the third embossed layer is extruded and fitted to the protrusion 21 of the second embossed layer.

[0074] Example 1, as shown in Figure 9, is a paper towel formed by an embossing roller with a first embossed layer 10, a second embossed layer 20a, and a third embossed layer 30.

[0075] The first embossed layer 10 has a first embossed layer low protrusion 11, a first embossed layer high protrusion 12, and a first embossed layer plane 13; the first embossed layer low protrusion 11 is a pressing point used to improve the embossed feel, and the first embossed layer high protrusion 12 is a combination of decorative lines and dots; both the first embossed layer low protrusion 11 and the first embossed layer high protrusion 12 face downwards.

[0076] The second embossed layer 20a has a second embossed layer protrusion 21 and a plane 22 between the second embossed layer protrusion; the second embossed layer protrusion 21 faces downward;

[0077] The third embossed layer 30 has a third embossed layer protrusion 31, a plane 32 between the third embossed layer protrusions, and a plane 33 of the third embossed layer; the third embossed layer protrusion 31 faces upward;

[0078] The first embossed layer 10 and the second embossed layer 20a are coated with a binder 40 by roller bonding. The high protrusion 12 of the first embossed layer and the protrusion 21 of the second embossed layer are extruded and fitted together and coated with binder 40. During the bonding process of the first embossed layer 10 and the second embossed layer 20a, the embossing marks of the high protrusion 12 of the first embossed layer are left on the bottom surface 213 of the second embossed layer, and the binder is applied to the marks. Since the width of the low protrusion d11 of the first embossed layer is less than or equal to the width d21 of the protrusion of the second embossed layer, and since the density of the low protrusion 11 of the first embossed layer is greater than the density of the protrusion 21 of the second embossed layer, a portion of the low protrusion 11 of the first embossed layer is supported by the protrusion 21 of the second embossed layer, and a portion of the low protrusion 11 of the first embossed layer is supported by the plane 22 between the protrusions of the second embossed layer.

[0079] The first embossed layer 10 and the second embossed layer 20a, which are extruded and coated with adhesive 40, are bonded to the third embossed layer 30; the first embossed layer protrusion 12 and the second embossed layer protrusion 21 are bonded to the plane 32 between the protrusions of the third embossed layer; the third embossed layer protrusion 31 and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together; the first embossed layer protrusion 21 on the first embossed layer 10 penetrates the second embossed layer 20a and the third embossed layer 30, and finally the three different embossed layers are bonded and locked together to form a solid three-dimensional structure.

[0080] Example 2, as shown in Figure 10, is a paper towel formed by an embossing roller with a first embossed layer 10, a second embossed layer 20b, and a third embossed layer 30.

[0081] The first embossed layer 10 has a first embossed layer low protrusion 11, a first embossed layer high protrusion 12, and a first embossed layer plane 13; the first embossed layer low protrusion 11 is a pressing point used to improve the embossed feel, and the first embossed layer high protrusion 12 is a combination of decorative lines and dots; both the first embossed layer low protrusion 11 and the first embossed layer high protrusion 12 face downwards.

[0082] The second embossed layer 20b has a second embossed layer protrusion 21 and a plane 22 between the second embossed layer protrusion; the second embossed layer protrusion 21 faces upward;

[0083] The third embossed layer 30 has a third embossed layer protrusion 31, a plane 32 between the third embossed layer protrusions, and a plane 33 of the third embossed layer; the third embossed layer protrusion 31 faces upward;

[0084] The first embossed layer 10 and the second embossed layer 20b are coated with a binder 40 by roller bonding. The high protrusion 12 of the first embossed layer and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together and coated with binder 40. During the bonding process of the first embossed layer 10 and the second embossed layer 20b, the embossing marks of the high protrusion 12 of the first embossed layer are left on the plane 22 between the protrusions of the second embossed layer, and the binder is applied to the marks. Since the width of the low protrusion d11 of the first embossed layer is less than or equal to the width d22 of the plane between the protrusions of the second embossed layer, and since the density of the low protrusion 11 of the first embossed layer is greater than the density of the protrusion 21 of the second embossed layer, a portion of the low protrusion 11 of the first embossed layer is supported by the two second embossed layer protrusions d21 at the upper end of the plane 22 between the protrusions of the second embossed layer, and a portion of the low protrusion 11 of the first embossed layer is supported by the plane 22 between the protrusions of the second embossed layer.

[0085] The first embossed layer 10 and the second embossed layer 20b, which are extruded and coated with adhesive 40, are bonded to the third embossed layer 30; the plane 22 between the first embossed layer protrusion 12 and the second embossed layer protrusion is bonded to the plane 32 between the third embossed layer protrusion; the third embossed layer protrusion 31 is extruded and fitted to the second embossed layer protrusion 21; the first embossed layer protrusion 21 on the first embossed layer penetrates the second embossed layer 20b and the third embossed layer 30, and finally the three different embossed layers are bonded and locked together to form a solid three-dimensional structure.

[0086] Example 3, as shown in Figure 11, is a paper towel in which a first embossed layer 10 and a third embossed layer 30 are formed by an embossing roller; the second embossed layer 20c is a known product with wrinkles, wavy outlines, and corrugated outlines.

[0087] The first embossed layer 10 has a first embossed layer low protrusion 11, a first embossed layer high protrusion 12, and a first embossed layer plane 13; the first embossed layer low protrusion 11 is a pressing point used to improve the embossed feel, and the first embossed layer high protrusion 12 is a combination of decorative lines and dots; both the first embossed layer low protrusion 11 and the first embossed layer high protrusion 12 face downwards.

[0088] The second embossed layer has a wave structure such as wrinkles, wavy contours, and wavy contours, with upward and downward protrusions. The downward protrusions can be understood as the protrusions of the second embossed layer.

[0089] The second embossed layer protrusion is a wave structure formed during the wet papermaking process, or the second embossed layer protrusion is an embossing point formed by an embossing machine on dry paper.

[0090] The wave structure is a wrinkled, wavy, or wavy profile, and its processing method can be achieved using existing technologies such as TAD, NTT, QRT, ATMOS, and eTAD.

[0091] The third embossed layer 30 has a third embossed layer protrusion 31, a plane 32 between the third embossed layer protrusions, and a plane 33 of the third embossed layer; the third embossed layer protrusion 31 faces upward;

[0092] The first embossed layer 10 and the second embossed layer 20c are coated with a binder 40 by roller bonding. The high protrusion 12 of the first embossed layer and the protrusion 21 of the second embossed layer are extruded and fitted together and coated with binder 40. During the bonding process of the first embossed layer 10 and the second embossed layer 20c, the embossing marks of the high protrusion 12 of the first embossed layer are left on the bottom surface 213 of the second embossed layer, and the binder is applied to the marks. Since the width of the low protrusion d11 of the first embossed layer is less than or equal to the width d21 of the protrusion of the second embossed layer, and since the density of the low protrusion 11 of the first embossed layer is greater than the density of the protrusion 21 of the second embossed layer, the low protrusion 11 of the first embossed layer is supported by the protrusion 21 of the second embossed layer.

[0093] The first embossed layer 10 and the second embossed layer 20c, which are extruded and coated with adhesive 40, are bonded to the third embossed layer 30; the first embossed layer protrusion 12 and the second embossed layer protrusion 21 are bonded to the plane 32 between the protrusions of the third embossed layer; the third embossed layer protrusion 31 and the plane 22 between the protrusions of the second embossed layer are extruded and fitted together; the first embossed layer protrusion 21 on the first embossed layer penetrates the second embossed layer 20c and the third embossed layer 30, and finally the three different embossed layers are bonded and locked together to form a solid three-dimensional structure.

[0094] In summary, this invention provides a tissue and its manufacturing method. By defining a three-layer embossed pattern, the high protrusions of the first embossed layer and the protrusions of the second embossed layer, or the planar extrusions between the protrusions of the second embossed layer, are interlocked and coated with an adhesive. During the lamination process of the first and second embossed layers, embossing marks from the high protrusions of the first embossed layer are left on the surface of the second embossed layer, and an adhesive is applied to these marks. After being pressed by a roller with a certain force, the marks are bonded together with the third embossed layer. Because the density of the low protrusions of the first embossed layer is greater than the density of the protrusions of the second embossed layer, a portion of the low protrusions of the first embossed layer are obscured by the high protrusions of the second embossed layer. The first embossed layer provides support, with a portion of the low protrusions of the first embossed layer supported by the plane between the protrusions of the second embossed layer; this maximizes the product thickness, increasing it by 52% compared to traditional three-layer embossing processes; the third embossed layer mainly consists of small embossed dots of a certain density, generally similar to the density of the first embossed layer, thus achieving a similar tactile feel; the high protrusions of the first embossed layer penetrate the second and third embossed layers, ultimately bonding and locking the three different embossed layers together to form a solid three-dimensional structure, thereby significantly improving the physical properties of the tissue product, such as thickness, feel, and absorbency.

[0095] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A paper towel, comprising a first embossed layer, a second embossed layer, and a third embossed layer; The first embossed layer has a first embossed layer low protrusion and a first embossed layer high protrusion; the first embossed layer low protrusion includes a first embossed layer low protrusion width and a first embossed layer low protrusion height; the first embossed layer high protrusion includes a first embossed layer high protrusion width and a first embossed layer high protrusion height. The second embossed layer has a second embossed layer protrusion and a plane between the second embossed layer protrusion; the second embossed layer protrusion includes a second embossed layer protrusion width and a second embossed layer protrusion height; the plane between the second embossed layer protrusions has a second embossed layer protrusion plane width. The third embossed layer has embossed protrusions and a plane between the protrusions; the protrusions of the third embossed layer include the width of the protrusions and the height of the protrusions. Its features are, The height of the first embossed layer protrusion is greater than the height of the second embossed layer protrusion; the height of the second embossed layer protrusion is greater than or equal to the height of the third embossed layer protrusion. The width of the low protrusion of the first embossed layer is less than or equal to the width of the protrusion of the second embossed layer or the plane width between the protrusions of the second embossed layer; The density of the low-relief areas in the first embossed layer is greater than the density of the relief areas in the second embossed layer; During the roller bonding process of the first embossed layer and the second embossed layer, the high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and fitted together and coated with a binder; a portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer; Alternatively, during the process of rolling the first embossed layer and the second embossed layer together, the plane between the high protrusions of the first embossed layer and the protrusions of the second embossed layer is extruded and fitted together and coated with a bonding agent; a portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer. The first embossed layer and the second embossed layer, after being coated with a binder, are bonded to the third embossed layer by a roller.

2. The paper towel according to claim 1, characterized in that, The first embossed layer and the second embossed layer after being coated with a binder are combined with the third embossed layer by a roller. The protrusions of the first embossed layer and the protrusions of the second embossed layer are pressed and bonded to the plane between the protrusions of the third embossed layer and the plane between the protrusions of the third embossed layer and the protrusions of the second embossed layer.

3. The paper towel according to claim 1, characterized in that, The first embossed layer and the second embossed layer after being coated with a binder are combined with the third embossed layer by a roller. The plane between the protrusions of the first embossed layer and the protrusions of the second embossed layer, which are extruded and coated with a binder, is bonded to the plane between the protrusions of the third embossed layer. The protrusions of the third embossed layer and the protrusions of the second embossed layer are extruded and fitted together.

4. A paper towel according to claim 2 or 3, characterized in that, The first embossed layer, the second embossed layer, and the third embossed layer are all one, two, or multiple layers.

5. A paper towel according to claim 2 or 3, characterized in that, The low protrusions of the first embossed layer are pressure points; the high protrusions of the first embossed layer are a combination of dots and lines.

6. A paper towel according to claim 2 or 3, characterized in that, The second embossed layer has a wave-like structure, or the second embossed layer has embossed dots.

7. A paper towel according to claim 6, characterized in that, The wave structure is described as wrinkles, wavy outlines, or wave-like outlines.

8. A paper towel according to claim 2 or 3, characterized in that, The binder is glue, water, or a natural extract; the binder may have color or fragrance, or be colorless and odorless.

9. A method for manufacturing a paper towel, wherein the paper towel is the paper towel according to any one of claims 1-8, characterized in that, The first embossed layer, the second embossed layer, and the third embossed layer are formed by embossing rollers; The first embossed layer and the second embossed layer are coated with a binder by roller bonding. The high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and inlaid and coated with a binder. A portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer, and a portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer; The first embossed layer and the second embossed layer, which are extruded and coated with a binder, are bonded to the third embossed layer; the high protrusions of the first embossed layer and the protrusions of the second embossed layer are planarly bonded to the protrusions of the third embossed layer, and the protrusions of the third embossed layer and the protrusions of the second embossed layer are planarly extruded and bonded.

10. A method for manufacturing a paper towel, wherein the paper towel is the paper towel according to any one of claims 1-8, characterized in that, The first embossed layer and the third embossed layer are formed by embossing rollers; The first embossed layer and the second embossed layer are bonded together by roller coating. The high protrusions of the first embossed layer and the protrusions of the second embossed layer are extruded and fitted together and coated with bonded agent. A portion of the low protrusions of the first embossed layer are supported by the plane between the protrusions of the second embossed layer. A portion of the low protrusions of the first embossed layer are supported by the protrusions of the second embossed layer; The first embossed layer and the second embossed layer, which are extruded and coated with a binder, are bonded to the third embossed layer; the plane between the protrusions of the first embossed layer and the protrusions of the second embossed layer is bonded to the plane between the protrusions of the third embossed layer, and the protrusions of the third embossed layer and the protrusions of the second embossed layer are extruded and bonded together.

Images