Composite assembly, glue-free composite printing system and printing paper product

Abstract

The utility model discloses a composite assembly, a glue-free composite printing system and a printing paper product, and belongs to the technical field of household paper printing processes. The composite assembly comprises a first composite roller and a second composite roller which are matched with each other, wherein the two composite rollers are horizontally arranged, and the rotation directions of the two composite rollers are opposite; a plurality of composite protrusions are arranged on the two composite rollers, and the gap between the top pressing faces of a pair of composite protrusions located at the composite positions on the two composite rollers ranges from 0.02 mm to 0.25 mm; the pair of composite protrusions located at the composite positions are matched with each other to press the raw paper, so that the composite areas of the two raw paper are interwoven together under the pressure effect, and gelling-free composite is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of embossing technology for daily-use paper, and more specifically relates to a composite component, a non-glue composite printing system and printed paper products. Background Art

[0002] Paper towels are a necessity in people's daily life. Paper towels are usually made of two or more layers. Embossed composite paper products are widely favored by consumers because of their good water absorption and fluffiness.

[0003] In the existing household paper industry, for some embossed composite paper products, generally, multiple layers of base paper are embossed and formed, and then the multiple layers of embossed base paper are composited to form a composite tissue with a first bulkiness and strong water absorption capacity. There are usually two ways to composite the multiple layers of embossed base paper.

[0004] Method 1: Gluing and lamination

[0005] For example, the application case with Chinese patent publication number CN 110202842 A discloses a secondary gluing composite embossing mechanism for household paper. The application case includes a first embossing roller group and a second embossing roller group, wherein the first embossing roller group and the second embossing roller group respectively emboss the preset first base paper and the second base paper to form a high and low texture pattern, and also includes a first composite roller group, a second composite roller group and two groups of gluing components, wherein the two groups of gluing components respectively roll glue on the first base paper a and the second base paper after embossing, the first composite roller group is used to press the first base paper with glue and the preset third base paper together for the first time; the second composite roller group is used to press the first base paper and the third base paper after the first pressing by the first composite roller group and the second base paper with glue; the upper surface and the lower surface of the third base paper are respectively in contact with the glue surface of the first base paper and the glue surface of the second base paper for bonding.

[0006] For example, in patent DE102021123043A1, a thin paper web is guided through an embossing gap between an embossing roller and a counter-roller provided with embossing pins, the embossing needles are moistened with liquid before contacting the thin paper web, and the thin paper web is brought into contact with the embossing needles moistened with liquid, at least during the embossing process, thereby locally applying liquid.

[0007] Although gluing and laminating can well ensure the connection strength and overall fluffiness of paper, it requires a large amount of glue, which not only increases the material cost, but also glue is a chemical synthetic material with certain volatile harmful components, which will cause certain health effects to producers and users during the production process or use, and is not conducive to environmental protection.

[0008] Method 2: Glue-free lamination

[0009] For example, the application case with Chinese patent publication number CN 108481986 A discloses a double-layer point-to-point glue-free composite embossing system and composite embossed paper thereof. The application case includes an upper glue roller, an upper embossing roller, a lower glue roller, a lower embossing roller and a smooth roller, wherein the upper glue roller and the upper embossing roller are close to each other to cooperate with embossing, so that the preset first base paper forms a texture pattern composed of multiple first recessed points, the lower glue roller and the lower embossing roller are close to each other to cooperate with embossing, so that the preset second base paper forms a texture pattern composed of multiple second recessed points, the upper embossing roller and the smooth roller are close to each other, wherein the embossed first base paper and the second base paper meet at the tangent point of the upper embossing roller and the smooth roller to cooperate with compression and composite, so that the first recessed point corresponds to the second recessed point one by one, and the corresponding bottom end of the first recessed point is tightly combined with the bottom end of the second recessed point; adopting this composite method ensures the close combination between the two layers of base paper, achieves the effect of environmental protection, and reduces the production cost for the enterprise.

[0010] For another example, the application with Chinese patent publication number CN 102407614 A discloses an embossing device for paper towel processing equipment and its embossing production process. The device of the application includes a bottom roller, and at least two groups of embossing roller groups acting on the roller surface of the bottom roller are arranged on both sides of the bottom roller along the axial direction of the bottom roller; one group of embossing roller groups is composed of one or more embossing roller assemblies, and the other embossing roller group is composed of two or more embossing roller assemblies, and each of the above embossing roller assemblies is pressurized by an independent pressurizer; the embossing roller assembly on one side cooperates with the embossing roller assembly on the other side to rotate to form a complementary embossing pattern.

[0011] The above-mentioned glue-free lamination method solves the defects of high cost and environmental disadvantages caused by glue lamination. However, when the printed multi-layer paper is pressed and laminated, the printing marks on the paper near the bottom roller (smooth roller) will be squeezed to a certain extent, resulting in unclear embossing texture and poor embossing effect; it will also affect the fluffiness of the final product. Utility Model Content

[0012] 1. Problems to be solved

[0013] In view of at least some of the problems existing in the above-mentioned prior art, the present invention proposes a glue-free composite printing system, which aims to solve the problem that the existing glue-free composite technology cannot well guarantee the printing texture on the original paper during compression and composite, thereby resulting in the final printing texture being unclear and the printing effect being deteriorated.

[0014] In addition, the utility model also provides a non-glue composite paper with clear printing texture and good fluffiness.

[0015] 2. Technical solution

[0016] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0017] The utility model discloses a composite assembly, comprising a first composite roller and a second composite roller that cooperate with each other; wherein the two composite rollers rotate in opposite directions;

[0018] Both composite rollers are provided with a plurality of composite protrusions. A pair of composite protrusions located at the composite position on the two composite rollers have a gap between the top pressing surfaces of 0.02mm-0.25mm;

[0019] A pair of composite protrusions located at the composite position cooperate with each other to press the original paper, so that the composite areas of the two original paper sheets are intertwined with each other under pressure to form a non-glue composite.

[0020] Furthermore, the width of the pressing surface of the composite protrusion is 0.5-1.5 mm.

[0021] Furthermore, in a pair of composite protrusions located at the composite position, the pressing surface width of one composite protrusion is 1-2 times that of the other one.

[0022] Furthermore, of the pair of composite protrusions located at the composite position, one of the pressing surfaces has a width of 0.6 mm to 1.2 mm, and the other pressing surface has a width of 0.8 mm to 1.4 mm.

[0023] Furthermore, the height of the composite protrusion is 0.2mm-1.5mm.

[0024] Furthermore, the top pressing surfaces of the pair of composite protrusions located at the composite position at least partially correspond to each other.

[0025] The utility model discloses a non-glue composite printing system, comprising a printing assembly consisting of a printing roller and a bottom roller, and the composite assembly mentioned above;

[0026] The printing assembly is provided in two groups, and is used to form a series of recessed portions on the surface of each base paper;

[0027] The composite component composites two sheets of original paper with recessed parts without gluing.

[0028] Furthermore, the printing roller is provided with a printing protrusion for forming a recessed portion on the base paper, and the height of the printing protrusion is smaller than the height of the composite protrusion.

[0029] The utility model discloses a non-glue composite printing system, comprising a first bottom roller, a second bottom roller, and the composite component mentioned above.

[0030] The first bottom roller cooperates with the first composite roller, and the second bottom roller cooperates with the second composite roller, and the composite rollers press the surfaces of the respective base papers to form a series of recessed portions;

[0031] The two laminating rollers of the laminating assembly press the recessed parts of the two original papers again to form a glue-free lamination.

[0032] Furthermore, the two composite rollers are also provided with printed protrusions, and the height of the printed protrusions is not greater than the height of the composite protrusions.

[0033] Further, the tangent point between the first bottom roller and the first composite roller, the tangent point between the second bottom roller and the second composite roller, and the composite position between the two composite rollers are all located in the upper half of the corresponding composite rollers.

[0034] Furthermore, the first composite roller and the second composite roller are arranged on the left and right, and the central axes of the two composite rollers are located in the same horizontal plane; the point of intersection between the first bottom roller and the first composite roller is located on the upper left side of the first composite roller, and the point of intersection between the second bottom roller and the second composite roller is located on the upper right side of the second composite roller.

[0035] The utility model discloses a printed paper product, comprising a first base paper and a second base paper which are stacked on each other, wherein a series of recessed portions are formed on the surfaces of the first base paper and the second base paper, wherein the bottom of the recessed portion is a composite area, and both sides of the recessed portion are hollow drum areas;

[0036] The composite areas on the two original papers correspond to each other one by one, there is no glue bonding between the corresponding composite areas, and the width of a single composite area is 0.5-1.5 mm.

[0037] Furthermore, there are two corresponding composite regions, wherein the width of one composite region is 1-2 times of the other.

[0038] Furthermore, the depth of the recessed portion is 0.2 mm-1.5 mm.

[0039] 3. Beneficial effects

[0040] Compared with the prior art, the beneficial effects of the utility model are:

[0041] (1) A composite component of the utility model can press the original paper through the mutual cooperation of a pair of composite protrusions located at the composite position, so that the composite areas of the two original papers are intertwined with each other under the action of pressure to form a non-glue composite. At the same time, during the pressing and composite process, the composite protrusion is located in the corresponding recessed part on the paper, which can form an effective support for the recessed part, ensuring that the original printed pattern is not destroyed during the pressing and composite process, and ensuring the fluffiness of the product.

[0042] (2) The utility model provides a glue-free composite printing system, which further ensures the integrity of the printed pattern by setting up a roller body that is shared by the embossing component and the composite component; it also reduces the use of the roller body and its accessories, which is conducive to cost saving.

[0043] (3) The utility model provides a glue-free composite printing system, which has a certain tolerance space between the two composite protrusions through the mutual cooperation of the large and small pressing surfaces; even if there is a certain offset and misalignment at the center positions of the two composite protrusions, as long as the small pressing surface can be completely landed on the corresponding large pressing surface, the effective composite area of ​​the composite area on the two original papers can be guaranteed.

[0044] (4) The utility model provides a glue-free composite printing system, which optimizes the relative positions of the rollers so that the area of ​​the original paper after being pressed by the bottom roller and the composite roller before entering the composite assembly is located in the upper half of the entire composite roller, so that the recessed portion of the original paper and the composite protrusion on the composite roller are always kept in contact with each other and are not easy to fall off; thereby effectively eliminating the interference to the final printing effect caused by the re-positioning of the recessed portion and the composite protrusion after separation.

[0045] (4) The printed paper product of the utility model has good printed textures and a certain fluffiness on the basis of achieving glue-free lamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a structural schematic diagram of an implementation method of a glue-free composite printing system of the utility model;

[0047] Figure 2 It is a structural schematic diagram of another embodiment of a glue-free composite printing system of the utility model;

[0048] Figure 3 It is a structural schematic diagram of another embodiment of a glue-free composite printing system of the utility model;

[0049] Figure 4 It is a partial schematic diagram of a printed paper product of the utility model;

[0050] Figure 5 It is a partial schematic diagram of another embodiment of a printed paper product of the utility model;

[0051] In the figure: 1, printing assembly; 11, first printing roller; 12, first bottom roller; 13, second printing roller; 14, second bottom roller;

[0052] 2. Composite assembly; 21. First composite roller; 22. Second composite roller;

[0053] 3. First original paper; 31. Recessed portion; 32. Composite area; 33. Hollow area; 4. Second original paper. DETAILED DESCRIPTION

[0054] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0056] The utility model is further described below in conjunction with specific embodiments.

[0057] Example 1

[0058] A composite assembly of this embodiment includes a first composite roller 21 and a second composite roller 22 that cooperate with each other, wherein the first composite roller 21 and the second composite roller 22 rotate in opposite directions.

[0059] The first composite roller 21 and the second composite roller 22 are both provided with a plurality of composite protrusions, and a pair of composite protrusions located at the composite position on the two composite rollers have a gap between their top pressing surfaces. The pair of composite protrusions at the composite position cooperate with each other to press the original paper, so that the composite areas 32 on the two original paper are intertwined with each other under pressure to form a non-glue composite.

[0060] It is worth mentioning that the "compound position" here refers to the point where the composite protrusions rotate with their respective composite rollers to a certain point, at which the gap between a pair of composite protrusions on different composite rollers is the smallest, and the composite area 32 of the original paper is pressed and composited at this point, which is the composite position.

[0061] As an implementation of this embodiment, the above gap is 0.02mm-0.25mm, such as 0.04mm, 0.10mm, 0.16mm, 0.20mm, etc. The setting of the gap not only enables the original paper to be pressed tightly in the composite area 32 to achieve glue-free composite, but also ensures that the original paper will not be torn during the pressing.

[0062] In order to ensure the effective pressing area and the connection strength between the papers, the width of the pressing surface of the composite protrusion is 0.5-1.5 mm, for example, 0.6 mm, 0.9 mm, 1.3 mm, etc. The height of the composite protrusion is 0.2 mm-1.5 mm, for example, 0.4 mm, 0.8 mm, 1.2 mm, etc.

[0063] It should be noted that the width of the lamination surface refers to the distance occupied by the top of the composite roller along the circumference of the roller body, while the height of the composite protrusion refers to the distance that the protrusion protrudes from the roller body.

[0064] The premise for realizing glue-free compounding of a composite assembly of this embodiment is that when a pair of composite protrusions that match each other are in the compound position, at least part of their pressing surfaces can overlap. However, since the area of ​​the pressing surface is relatively small, it brings great trouble to the alignment operation of the composite protrusions.

[0065] To this end, in this embodiment, a pair of composite protrusions are provided that fit together, wherein the width of the pressing surface of one composite protrusion is 1-2 times that of the other.

[0066] That is to say, the widths of the pressed surfaces of a pair of composite protrusions that cooperate with each other may be the same or different.

[0067] When the widths of the two pressing surfaces are the same, the two composite protrusions can be partially overlapped by setting the pressing surfaces of the two composite protrusions, that is, the center lines of each have a certain offset, so as to provide a certain tolerance space for the mutual cooperation of the two composite protrusions. However, the tolerance space is relatively small; at the same time, if the overlapping area between the two pressing surfaces is small, the effective pressing area of ​​the composite area 32 will be reduced, which is not conducive to the composite effect.

[0068] When the widths of the two pressed surfaces are larger or smaller, even if the centers of the two composite protrusions are misaligned to a certain extent, as long as the smaller pressed surface can be fully or partially placed on the larger pressed surface, a larger error tolerance space can be created between the two composite protrusions while ensuring the composite effect.

[0069] Preferably, the width ratio of the two pressed surfaces is 1:(1.1-1.5).

[0070] Furthermore, the width of one of the pressed surfaces is 0.6 mm-1.2 mm, and the width of the other pressed surface is 0.8 mm-1.4 mm.

[0071] Specifically in this embodiment, the composite protrusion with a larger pressing surface is arranged on the first composite roller 21, and the composite protrusion with a larger pressing surface is arranged on the second composite roller 22. Of course, it can also be achieved by alternately arranging pressing surfaces of different sizes on the same composite roller.

[0072] The composite protrusion is in the shape of a truncated cone, or other shapes may be used as an alternative, which are not listed here one by one.

[0073] A composite component of the present embodiment has the following working principle: two original papers with recessed portions 31 formed on their surfaces enter the composite component. When the original papers move to the composite position, the composite protrusions on the composite roller are inserted into the recessed portions 31 on the corresponding papers, and the composite areas 32 at the bottom of the recessed portions 31 on the two papers are pressed, so that the composite areas 32 are intertwined with each other under pressure to form a non-glued composite.

[0074] A composite assembly of this embodiment can press the original paper through the mutual cooperation of a pair of composite protrusions located at the composite position, so that the composite areas of the two original papers are intertwined with each other under pressure to form a non-glue composite. At the same time, during the pressing and composite process, the composite protrusion is located in the corresponding recessed part 31 on the paper, which can form an effective support for the recessed part 31, ensuring that the original printed pattern is not destroyed during the pressing and composite process, and ensuring the fluffiness of the product.

[0075] Example 2

[0076] This embodiment provides a non-glue composite printing system, such as Figure 1 As shown, the printing system includes a printing component 1 and the composite component 2 in the above embodiment.

[0077] The printing assembly 1 is provided with two groups, wherein the first printing assembly includes a first printing roller 11 and a first bottom roller 12 which are closely attached to each other, and the second printing assembly includes a second printing roller 13 and a second bottom roller 14 which are closely attached to each other, and both printing rollers are provided with a plurality of printing protrusions for forming a recessed portion 31 on the surface of the original paper.

[0078] In order to ensure that the recessed portion 31 formed by pressing the printed protrusion can maintain a complete shape during the pressing of the composite component 2, the height of the printed protrusion is not greater than the height of the composite protrusion.

[0079] The process of a non-glue composite printing system of this embodiment is as follows:

[0080] The first base paper 3 and the second base paper 4 enter between the corresponding printing roller and the bottom roller respectively. Under the pressure of the printing protrusions on their respective printing rollers, a series of recessed portions 31 are formed on their surfaces to combine into a texture pattern of a specific shape; the bottom of the recessed portion 31 is a composite area 32 for the base paper to be pressed and composited later.

[0081] The original paper sheets formed with the recessed portions 31 converge at the composite position of the composite component 2 as the respective printing rollers rotate; at this time, the composite protrusions on the composite roller are just located in the recessed portions 31 of the corresponding original paper sheets, so that the original printed shape will not be changed; at the same time, since a pair of composite protrusions located at the composite position correspond to each other, the composite areas 32 on the two papers also correspond to each other at this position; then, under the pressure of the composite protrusions, the composite areas 32 are intertwined with each other to form a non-gelatinized composite.

[0082] A glue-free composite printing system of the present embodiment can realize glue-free composite printing of paper through the cooperation of the printing component 1 and the composite component 2, avoiding the high cost and environmental disadvantages caused by gluing and laminating; at the same time, it also ensures the integrity of the printing texture to the greatest extent.

[0083] Example 3

[0084] Although the above embodiment can realize glue-free composite printing and ensure good printing quality. However, it is found in actual operation that the debugging work of the glue-free composite printing system is relatively cumbersome. This is because, during the entire printing composite process, not only the recessed portions 31 on the two original papers coming out of different printing components 1 need to correspond one to one, but also it is necessary to ensure that the composite protrusions on the composite roller can just fit into the corresponding recessed portions 31, and that the composite protrusions on the two composite rollers correspond to each other at the composite position. Any deviation in any of the above three links will damage the shape of the recessed portion 31, thereby affecting the final printing effect.

[0085] To solve the above problems, this embodiment proposes a non-glue composite printing system, such as Figure 2 As shown, the printing system includes a first bottom roller 12, a second bottom roller 14 and the composite component 2 in Example 1.

[0086] The first bottom roller 12 and the first composite roller 21 form a group of embossing components; the second bottom roller 14 and the second composite roller 22 form another group of embossing components; and the first composite roller 21 and the second composite roller 22 form a composite component 2.

[0087] At this time, the same composite roller has both composite protrusions and printed protrusions. To ensure that the composite protrusions and the printed protrusions do not interfere with each other, the height of the composite protrusions is not less than that of the printed protrusions.

[0088] When the height of the composite protrusion is greater than that of the printed protrusion, the original paper is only laminated without glue at the concave portion 31 pressed by the composite protrusion, while the concave portion 31 pressed by the printed protrusion is not laminated. At this time, since the depths of the concave portions 31 pressed by the composite protrusion and the printed protrusion are different, the laminated paper towel can present a high and low pattern.

[0089] When the height of the composite protrusion is consistent with the printing protrusion, the printing protrusion also becomes a composite protrusion, that is, the composite protrusion and the printing protrusion can be regarded as the same protrusion. In this way, the base paper is glue-free composited at each recessed portion 31, thereby improving the connection strength between the base papers.

[0090] In the glue-free composite printing system of this embodiment, the first base paper 3 and the second base paper 4 pass through their respective printing components 1, and a series of recessed portions 31 are formed on their surfaces; then, the two base papers are pressed and composited at the composite position between the first composite roller 21 and the second composite roller 22.

[0091] Since the printing assembly 1 and the compounding assembly 2 share two compounding rollers, the compounding protrusions on the compounding rollers must be mutually matched and engaged with the recessed portions 31 on the base paper. Subsequently, the printed base paper will enter the compounding position synchronously with the respective compounding rollers for pressing and compounding. At this time, it is only necessary to ensure that the compounding protrusions on the first compounding roller 21 and the second compounding roller 22 correspond to each other, so that the compounding areas 32 of the two base papers correspond to each other when they are pressed and compounded.

[0092] A glue-free composite printing system of the present embodiment, through the arrangement of the printing component 1 and the composite component 2 sharing part of the roller body, not only makes the installation and debugging operation of the entire printing system convenient and quick, and ensures the printing effect; in addition, it also saves the number of rollers and corresponding drive sources, which is conducive to reducing equipment investment costs and installation space.

[0093] Example 4

[0094] In actual use, it is found that before the printed original paper enters the composite component 2 for glue-free composite, due to the small area of ​​the composite protrusion, the recessed part 31 of the paper is easy to separate from the composite protrusion on the composite roller, which will interfere with the previous printing texture in the subsequent pressing and composite process.

[0095] To this end, a glue-free composite printing system in this embodiment further optimizes the relative positions of the rollers on the basis of Embodiment 3 to solve the above-mentioned problem.

[0096] refer to Figure 3 As shown, the tangent point between the first bottom roller 12 and the first composite roller 21, the tangent point between the second bottom roller 14 and the second composite roller 22, and the composite position between the two composite rollers are all located in the upper half of the corresponding composite rollers.

[0097] It should be noted that the tangent point between the bottom roller and the composite roller actually refers to the contact point between the printed protrusion on the composite roller and the bottom roller. The upper half of the composite roller refers to the area above the horizontal plane at the center of the roller body, that is, Figure 3 The middle dashed line and the area above it.

[0098] Specifically in this embodiment, the first composite roller 21 and the second composite roller 22 are arranged on the left and right sides (with Figure 3 The center axis of the two composite rollers is located in the same horizontal plane. The tangent point between the first bottom roller 12 and the first composite roller 21 is located on the upper left side of the first composite roller 21, and the tangent point between the second bottom roller 14 and the second composite roller 22 is located on the upper right side of the second composite roller 22.

[0099] This is to ensure that the point of intersection between the bottom roller and the printing roller is located on the basis of the upper area of ​​the corresponding printing roller, so that the first bottom roller 12 and the second bottom roller 14 are relatively far away; to prevent interference between the two bottom rollers during installation, affecting the normal use effect.

[0100] A glue-free composite printing system of the present embodiment is optimized by the relative positions of the rollers, so that before the original paper after being pressed by the bottom roller and the composite roller enters the composite assembly 2, its area X2 covered on the composite roller is located in the upper half of the entire printing roller, so that the recessed portion 31 of the original paper and the composite protrusion on the composite roller are always kept in a fitted state and are not easy to fall off; thereby, the interference to the final printing effect caused by the re-reset of the recessed portion 31 and the composite protrusion after separation can be effectively eliminated.

[0101] In addition, it should be noted that if there are defects in the flatness of the original paper before it enters the printing assembly for printing, it will also affect the printing effect.

[0102] Therefore, before the original paper enters the printing component, a suitable cutting angle must be selected.

[0103] Preferably, the arc length between the starting contact position and the ending contact position between the base paper and the bottom roller should not be less than 1 / 4 of the circumference of the bottom roller.

[0104] That is to say, the area X1 where the base paper is wrapped on the bottom roller is not less than 1 / 4 of the entire bottom roller in the circumferential direction, so that the base paper can have a sufficient length of wrapping around the bottom roller before entering the printing assembly; at the same time, the flatness of the base paper can be improved by adjusting the tightness of the fit between the base paper and the bottom roller.

[0105] Example 5

[0106] This embodiment provides a printed paper product, such as Figure 4 As shown, the printed paper product comprises a first base paper 3 and a second base paper 4 stacked on each other. A series of recessed portions 31 are formed on the surface of the first base paper 3 and the second base paper 4, the bottom of the recessed portion 31 is a composite area 32, and both sides of the recessed portion 31 are hollow areas 33.

[0107] The composite areas 32 on the two original papers correspond to each other one by one, and the corresponding composite areas 32 are non-glue composited to achieve a tight bond between the two papers.

[0108] The hollow areas 33 on the two original papers correspond to each other one by one, so that the paper product after non-gluing composite has good fluffiness.

[0109] Further, the width of a single composite region 32 is 0.5-1.5 mm, for example, 0.8 mm, 1.0 mm, 1.2 mm, etc.

[0110] The recessed portion 31 has a depth of 0.2 mm to 1.5 mm, for example, 0.6 mm, 1.0 mm, 1.3 mm, etc.

[0111] As an embodiment, there are two corresponding composite regions 32, wherein the width of one composite region is 1-2 times of the other.

[0112] Specifically, refer to Figure 5 As shown, the width of the composite area 32 on the first base paper 3 is L1, and the width of the composite area 32 on the second base paper 4 is L2. Preferably, L1 is (1.1-1.5) times of L2.

[0113] A printed paper product of the present embodiment, on the basis of achieving glue-free lamination, enables the paper to have good printed textures and a certain fluffiness.

[0114] It is worth noting that the glue-free lamination in this embodiment means that under the action of external force, the composite areas 32 of the two layers of paper are interwoven with each other, thereby achieving a tight combination between the papers.

[0115] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A composite assembly, comprising a first composite roller (21) and a second composite roller (22) that cooperate with each other, characterized in that: The first composite roller (21) and the second composite roller (22) rotate in opposite directions; A plurality of composite protrusions are provided on both composite rollers, and the height of the composite protrusions is 0.2 mm to 1.5 mm; a pair of composite protrusions located at the composite position on the two composite rollers have a gap between the top pressing surfaces of 0.02 mm to 0.25 mm; The width of the pressed surface of the composite protrusion is 0.5-1.5 mm, and the width of the pressed surface of one composite protrusion is 1-2 times that of the other; A pair of composite protrusions located at the composite position cooperate with each other to press the original paper, so that the composite areas (32) of the two original paper sheets are intertwined with each other under the action of pressure to form a non-glue composite.

2. A composite component according to claim 1, characterized in that: A pair of composite protrusions located at the composite position, wherein the width of one pressing surface is 0.6mm-1.2mm, and the width of the other pressing surface is 0.8mm-1.4mm.

3. A composite component according to claim 1, characterized in that: The top pressing surfaces of the pair of composite protrusions located at the composite position at least partially correspond to each other.

4. A glue-free composite printing system, comprising a printing assembly (1) consisting of a printing roller and a bottom roller, characterized in that: Also includes the composite component (2) described in any one of 1-3; The printing assembly (1) is provided in two groups, and is used to form a series of recessed portions (31) on the surface of each base paper; The composite component (2) performs glue-free composite on two sheets of original paper having recessed portions (31).

5. The glue-free composite printing system according to claim 4, characterized in that: The printing roller is provided with a printing protrusion for forming a recessed portion (31) on the original paper, and the height of the printing protrusion is smaller than the height of the composite protrusion.

6. A glue-free composite printing system, comprising a first bottom roller (12) and a second bottom roller (14), characterized in that: Also comprises the composite component (2) according to any one of claims 1 to 3, The first bottom roller (12) cooperates with the first composite roller (21), and the second bottom roller (14) cooperates with the second composite roller (22), and the composite rollers press the surfaces of the respective original papers to form a series of recessed portions (31); The two composite rollers of the composite assembly (2) press the recessed parts (31) of the two sheets of original paper again to form a non-glue composite.

7. The glue-free composite printing system according to claim 6, characterized in that: The two composite rollers are also provided with printing protrusions, and the height of the printing protrusions is not greater than the height of the composite protrusions.

8. The glue-free composite printing system according to claim 6 or 7, characterized in that: The tangent point between the first bottom roller (12) and the first composite roller (21), the tangent point between the second bottom roller (14) and the second composite roller (22), and the composite position between the two composite rollers are all located in the upper half of the corresponding composite rollers.

9. The glue-free composite printing system according to claim 8, characterized in that: The first composite roller (21) and the second composite roller (22) are arranged on the left and right, and the central axes of the two composite rollers are located in the same horizontal plane; the tangent point between the first bottom roller (12) and the first composite roller (21) is located on the upper left side of the first composite roller (21), and the tangent point between the second bottom roller (14) and the second composite roller (22) is located on the upper right side of the second composite roller (22).

10. A printed paper product, comprising a first base paper (3) and a second base paper (4) stacked on each other, characterized in that: A series of recessed portions (31) are formed on the surfaces of the first base paper (3) and the second base paper (4), the bottom of the recessed portion (31) is a composite area (32), and both sides of the recessed portion (31) are hollow areas (33); The composite areas (32) on the two original papers correspond to each other one by one, the corresponding composite areas (32) are non-glued composites, and the width of a single composite area (32) is 0.5-1.5 mm.

11. A printed paper product according to claim 10, characterized in that: There are two corresponding composite areas (32), wherein the width of one composite area is 1-2 times of the other.

12. A printed paper product according to claim 10, characterized in that: The depth of the recessed portion (31) is 0.2 mm-1.5 mm.

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