Embossing device and printed paper product

Abstract

The utility model discloses an embossing device and a printed paper product, and belongs to the technical field of household paper production equipment. The device comprises a rubber roller and a pattern roller which abut against each other, the pattern roller is provided with at least two kinds of high printing protrusions and low printing protrusions which are different in height, the pattern roller further abuts against a fine line roller, and fine line protruding points are densely distributed on the fine line roller. Wherein the distance between the pressing face of the high printing protrusions and the roller face of the fine line roller ranges from 0.06 mm to 0.28 mm, and a first pressing area is formed between the high printing protrusions and the fine line protruding points. A second pressing area is formed between the high-printing bulge and the roller surface of the fine-grain roller; in addition, the pattern roller and the fine line roller are different in diameter, so that the same-height pattern protrusions can be in extrusion fit with unspecific fine line protruding points; therefore, the definition of the embossed pattern and the service life of the fine-pattern roller can be well considered.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of paper production equipment, more particularly, relate to a embossing device and printing paper product. BACKGROUND

[0002] Tissue paper is a necessity in people's daily life, and the number of layers of tissue paper is usually two or more than two layers. Embossed composite paper is favored by consumers because of its good water absorption and bulkiness. In the existing paper industry, for some embossed composite paper, the embossed composite paper is usually embossed after being formed by multiple layers of raw paper, and then the multiple layers of embossed raw paper are compounded to form a composite tissue paper with a first bulkiness and strong water absorption capacity.

[0003] The compounding method of embossed composite paper usually includes two ways of glue compounding and glue-free compounding. Among them, the glue compounding is a way of adhesion by coating glue. For example, the patent CN110202842A discloses a secondary glue compounding embossing mechanism for paper. The application first applies glue to the first raw paper and the second raw paper after embossing by the glue applying assembly, and then the upper surface and the lower surface of the third raw paper are respectively contacted and adhered with the glue surface of the first raw paper and the glue surface of the second raw paper by the compounding roller group. However, the glue compounding in the application needs to consume a large amount of glue, which not only increases the production cost, but also has certain harmful components volatilization, which is not conducive to environmental protection.

[0004] Glue-free compounding refers to the compounding of multiple layers of paper by mechanical pressing. For example, the patents CN108481986A and CN211138321U adopt "point-to-point" or "point-to-surface" glue-free compounding method to make the two layers of raw paper tightly combined. However, in order to ensure the firmness of compounding, the embossing protrusions on the embossing roller cannot be too small, which easily leads to the overall fuzziness of the embossed pattern after compounding, and it is not easy to distinguish, thereby seriously affecting the appearance of the embossed paper product.

[0005] In addition, the patent CN208232672U discloses a single-sided embossed compounding device for paper. The application can effectively improve the integrity of the embossed pattern by forming composite protrusions on the top surface of the embossing protrusions. However, the composite protrusions in the application need to be continuously pressed with the embossing roller, thereby accelerating the wear of the composite protrusions and greatly reducing the service life of the embossing roller. Therefore, it is of great practical significance to design an embossing device that can ensure the good appearance of the embossed paper product and guarantee the service life of the embossing roller. UTILITY MODEL CONTENT

[0006] 1. Problem to be solved

[0007] In view of the problem that the existing glue-free embossing device cannot well balance the definition of embossed lines and the service life of the fine line roller, the utility model provides an embossing device, which utilizes the fine line convex points to be compounded at the bottom of the pre-pressing recessed part, can effectively avoid the damage to the pattern, and ensures the integrity of the embossed lines; meanwhile, by lowering the height of the fine line convex points and adopting the mode that the printing convex points are extruded and matched with the unspecified fine line convex points, the transition wear of the fine line convex points can be effectively reduced, and the service life thereof is beneficial to be prolonged.

[0008] 2. Technical scheme

[0009] In order to solve the above problems, the technical scheme adopted by the utility model is as follows:

[0010] The utility model discloses an embossing device which comprises a rubber roller and a pattern roller which abut against each other, wherein the pattern roller is provided with at least two kinds of high printing convex points and low printing convex points which are different in height, and the pattern roller further abuts against a fine line roller, and the fine line roller is densely distributed with fine line convex points.

[0011] The embossing marks formed by the fine line convex points on the paper are filled in the embossing marks formed by the high printing convex points.

[0012] The distance between the pressing surface of the high printing convex point and the roller surface of the fine line roller is 0.06-0.28mm, so that a first pressing area is formed between the high printing convex point and the fine line convex point, a second pressing area is formed between the high printing convex point and the roller surface of the fine line roller, and

[0013] The pattern roller and the fine line roller adopt different diameters, so that the same high printing convex point can be extruded and matched with unspecified fine line convex points.

[0014] In some embodiments, the hardness of the high printing convex point is greater than that of the fine line convex point.

[0015] In some embodiments, the hardness of the high printing convex point and the fine line convex point is 55-65HRC.

[0016] In some embodiments, the height of the fine line convex point protruding from the roller surface of the fine line roller is 0.08-0.25mm, and the distance between the pressing surface of the fine line convex point and the pressing surface of the high printing convex point is 0.01-0.18mm.

[0017] In some embodiments, the pressing area of the fine line convex point is less than 0.15mm 2 , and the gap between adjacent fine line convex points is 0.08-0.35mm.

[0018] In some embodiments, the several high printing convex points form a pattern, and the several low printing convex points form a pattern or a series of convex points.

[0019] In some embodiments, the series of protrusions fill the entire area of the embossing roll surface except for the high embossing protrusions; or, the series of protrusions surround the pattern formed by the high embossing protrusions.

[0020] In some embodiments, the rubber roll further abuts against a pre-embossing roll, which is provided with a plurality of pre-embossing protrusions; wherein the plurality of pre-embossing protrusions form a pattern or a series of protrusions.

[0021] In some embodiments, the pre-embossing protrusions are distributed on the entire surface of the pre-embossing roll; or, the plurality of pre-embossing protrusions form a blank area.

[0022] In some embodiments, the height of the pre-embossing protrusions is less than that of the low embossing protrusions; when the concave points pressed by the pre-embossing roll are located in the area of the high embossing protrusions and / or the low embossing protrusions, they can be further pressed to form new concave points.

[0023] The utility model discloses a kind of embossing devices, including mutually abutting rubber roll and pattern roll, wherein, the pattern roll is provided with at least two high embossing protrusions and low embossing protrusions of different height, the pattern roll further abuts against fine grain roll, and the fine grain roll is densely distributed with a plurality of fine grain protrusions;Wherein,

[0024] The indentation formed by the fine grain protrusions on the paper fills the indentation formed by the high embossing protrusions;

[0025] The diameter of the pattern roll and the fine grain roll is different, so that the same high embossing protrusion can be extruded with unspecified fine grain protrusions; and,

[0026] The high embossing protrusion and the fine grain protrusion form a first pressing area for extruding the incoming base paper; and a second pressing area for extruding the incoming base paper is formed between the high embossing protrusion and the surface of the fine grain roll.

[0027] The utility model discloses a kind of embossed paper products, including mutually superimposed first base paper and second base paper, the first base paper is pre-pressed to form a series of recesses, and the recess at least includes two first recess and second recess of different depth;Wherein,

[0028] The bottom of the first recess and the overlapping portion between the second base paper form a glue-free composite area; a plurality of first composite sites in the form of fine dots are formed in the glue-free composite area, and a plurality of second composite sites are formed in the non-first composite area of the glue-free composite area.

[0029] In some embodiments, a plurality of first recesses form a pattern with a certain shape; a plurality of second recesses form a pattern or a series of recesses.

[0030] In some embodiments, the series of concave dots cover the entire area of the first base paper non-first concave portion; or, the series of concave dots have clear boundaries with the pattern formed by the first concave portions.

[0031] The utility model discloses a kind of embossed paper products, including mutually superimposed first base paper and second base paper, the first base paper is formed with a series of concave portions in advance and is pressed;The concave portion at least includes two kinds of first concave portion and second concave portion with different depths;

[0032] The bottom of the first concave portion and the overlapping portion between the second base paper form a glue-free composite area;The glue-free composite area is formed with a plurality of first composite sites in the form of fine dots;

[0033] Among them, the first composite site includes third concave portion located on the bottom surface of the first concave portion and protruding portion located on the second base paper.

[0034] 3, beneficial effects

[0035] Compared with prior art, the utility model has the beneficial effects that:

[0036] (1) the embossing device of the utility model, by high, low embossed protrusion can form the pattern of high and low staggered on paper product, so that the stereoscopic feeling of embossed paper product is stronger;Using fine line protrusion to composite at the bottom of pre-pressing forming concave portion, can effectively avoid the damage to pattern, guarantee the appearance of embossed paper product;At the same time, by reducing the height of fine line protrusion, and using embossed protrusion and unspecified fine line protrusion to extrude and cooperate, can effectively reduce the transition wear of fine line protrusion, is favorable for prolonging its service life.

[0037] (2) the embossed paper product of the utility model, first concave portion and second concave portion with different depths are formed on its front, can form a variety of patterns of high and low staggered, not only enriches the appearance of embossed paper product, and has good stereoscopic feeling, can greatly improve the beauty of embossed paper product. At the same time, a series of fine dots can be observed on the top of the first concave portion, which can effectively increase the clarity of the pattern. In addition, the first concave portion is outlined by protruding portion, so that the pattern formed by the first concave portion can be clearly displayed on the back of the embossed paper product, which is also conducive to improving the appearance of the paper product. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a structural schematic view of the embossing device of the utility model;

[0039] Figure 2 It is a structural schematic view of the embossing device of the utility model; Figure 1 It is a local enlarged schematic view of A in the middle;

[0040] Figure 3 is Figure 1 a local enlarged schematic view at B;

[0041] Figure 4 is Figure 1 a local enlarged schematic view at C;

[0042] Figure 5 is a schematic view of cooperation between high printing raised points and fine line raised points in the utility model;

[0043] Figure 6 is a schematic view of one embodiment after the pattern roller surface is unfolded in the utility model;

[0044] Figure 7 is a schematic view of another embodiment after the pattern roller surface is unfolded in the utility model;

[0045] Figure 8 is a schematic view of still another embodiment after the pattern roller surface is unfolded in the utility model;

[0046] Figure 9 is a schematic view of another structure of the embossing device in the utility model;

[0047] Figure 10 is a schematic view of one embodiment after the pre-embossing roller surface is unfolded in the utility model;

[0048] Figure 11 is a schematic view of another embodiment after the pre-embossing roller surface is unfolded in the utility model.

[0049] Figure 12 is a schematic view of the structure after the printing paper product is split in the utility model;

[0050] Figure 13 is a schematic view of the structure in the glue-free composite area in the utility model.

[0051] In the figure: 100, glue roller; 200, pattern roller; 210, high printing raised point; 220, low printing raised point; 300, fine line roller; 310, fine line raised point; 400, first base paper; 410, first recessed part; 420, second recessed part; 430, third recessed part; 500, second base paper; 510, protruding part; 600, pre-embossing roller; 610, pre-embossing raised point; 700, glue-free composite area; 710, first composite position; 720, second composite position. DETAILED DESCRIPTION

[0052] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] The present invention will be further described below with reference to specific embodiments.

[0055] like Figures 1-4 As shown, an embossing device of this embodiment includes a rubber roller 100, a patterned roller 200, and a fine-textured roller 300 that abut against each other in sequence. The rubber roller 100 has a soft roller surface, which may be, but is not limited to, rubber. The roller surfaces of the patterned roller 200 and the fine-textured roller 300, as well as the protrusions thereon, are made of a hard material, which may be, but is not limited to, steel. The patterned roller 200 has a plurality of printing protrusions, including at least two types of high-printing protrusions 210 and low-printing protrusions 220. The fine-textured roller 300 is densely distributed with fine-textured protrusions 310, and the indentations formed by these fine-textured protrusions 310 on the paper fill the indentations formed by the high-printing protrusions 210.

[0056] During processing, the first base paper 400 is fed into the gap between the rubber roller 100 and the patterned roller 200. The high-printing protrusions 210 and low-printing protrusions 220 cooperate with the rubber roller 100 to press and form a series of first recesses 410 and second recesses 420 on the first base paper 400. The first recesses 410 and the second recesses 420 both protrude from the surface of their respective base papers.

[0057] The first base paper 400 with the recessed portion rotates with the patterned roller 200 into the gap between the patterned roller 200 and the fine-textured roller 300, and merges with the second base paper 500. Since the distance h between the high-printing protrusions 210 and the fine-textured protrusions 310 is less than the thickness of the merged base paper, a first pressing area is formed between the pressing surface (i.e., the top surface) of the high-printing protrusions 210 and the pressing surface of the fine-textured protrusions 310. This allows the merged base paper layers to be pressed and laminated within the glue-free lamination area 700 of the two base papers. The glue-free lamination area 700 is actually the area where the bottom of the first recessed portion 410 overlaps with the second base paper 500.

[0058] The distance between the low-printing protrusion 220 and the fine-line protrusion 310 is greater than the thickness of the common-merging base paper; therefore, the base paper is not pressed. Of course, the distance between the low-printing protrusion 220 and the fine-line protrusion 310 can also be set to be less than the thickness of the common-merging base paper, so that the base paper can also be pressed. However, this will make the height difference between the high-printing protrusion and the low-printing protrusion smaller, which is not conducive to the stereoscopic effect of the pattern after the pattern is formed.

[0059] The embossing device of the embodiment can form a high-low staggered pattern on the composite paper product due to the presence of the high-printing protrusion and the low-printing protrusion, so that the stereoscopic effect of the printed paper product is stronger. At the same time, the first recessed part 410 is always sleeved on the high-printing protrusion 210 during the entire pressing process. Therefore, the shape of the first recessed part 410 is not damaged. In addition, since the fine-line protrusion 310 is only pressed and combined in the pressing surface area of the high-printing protrusion 210, the pattern formed by the high-printing protrusion 210 on the first base paper 400 can be clearly presented on the second base paper 500, so as to further improve the appearance of the paper product.

[0060] It is worth mentioning that the first base paper 400 and the second base paper 500 described above can be single-layer base paper or multi-layer base paper. At the same time, the plurality of high-printing protrusions 210 can form at least one pattern. The pattern here can be a graphic, a character, or a combination of the two, which can be determined according to actual needs and is not limited here.

[0061] In addition, it should be noted that the distance h between the pressing surface of the fine-line protrusion 310 and the pressing surface of the high-printing protrusion 210, and the distance H between the pressing surface of the high-printing protrusion 210 and the roller surface of the fine-line roller 300 are both referred to the composite position. The composite position refers to the gap between the fine-line protrusion 310 and the high-printing protrusion 210 being the smallest when the fine-line protrusion 310 and the high-printing protrusion 210 rotate to a certain position, and the first base paper 400 and the second base paper 500 are pressed and combined at this position, which is the composite position.

[0062] Reference Figure 5 As shown in some embodiments, the distance H between the pressing surface of the high-printing protrusion 210 and the roller surface of the fine-line roller 300 is 0.06-0.28mm, for example, 0.07mm, 0.15mm, 0.20mm, 0.25mm, etc. Therefore, whether the first base paper 400 and the second base paper 500 are single-layer or multi-layer, in addition to the first pressing area formed between the high-printing protrusion 210 and the fine-line protrusion 310, a second pressing area can also be formed between the high-printing protrusion 210 and the roller surface of the fine-line roller 300, so as to further ensure the firmness of the composite.

[0063] It is worth mentioning that in some cases, the pressure in the second pressing area can be small, although the base paper is pressed, but not enough to complete the composite between the base paper, but this does not affect the pressing composite of the base paper in the first pressing area. That is, the existence of the second pressing area is only to further improve the composite effect after the base paper is compounded in the first pressing area. Therefore, the pressing composite effect of the second pressing area is not necessary.

[0064] Generally, the distance H between the pressing surface of the high printing protrusion 210 and the roller surface of the fine line roller 300 is 0.06-0.28mm. In order to improve the penetration of the fine line protrusion 310 at the bottom of the first recess 410, so that the pressure mark produced by the fine line protrusion 310 can more clearly present the upper surface of the first base paper 400, to increase the beauty of the paper product. The height of the fine line protrusion 310 should be as high as possible, of course, under the premise of not breaking the paper. Because the presence of high and low patterns in the embodiment can meet the demand of the beauty of the paper product. Therefore, the height of the fine line protrusion 310 protruding from the roller surface of the fine line roller 300 can be controlled in the range of 0.08-0.25mm, for example, 0.10mm, 0.14mm, 0.18mm, 0.22mm, etc. Preferably, 0.12-0.20mm. At the same time, the distance h between the pressing surface of the fine line protrusion 310 and the pressing surface of the high printing protrusion 210 is controlled in the range of 0.01-0.18mm, for example, 0.05mm, 0.11mm, 0.16mm, etc.; preferably, 0.02-0.15mm. Through the control of the above distance, on the one hand, it can ensure that each base paper can be pressed and compounded in the first pressing area, and ensure the clarity of the pressure mark formed by the fine line roller 300 on the second base paper 500; on the other hand, it can effectively reduce the height of the fine line protrusion 310 to prolong its service life. That is, in the present embodiment, the clarity of the pressure mark presented by the fine line protrusion 310 on the first base paper 400 is not excessively required, and the wear of the fine line protrusion 310 is accelerated.

[0065] In some embodiments, the pattern roller 200 and the fine line roller 300 have different diameters, so that the specific fine line protrusion 310 is pressed with the same high printing protrusion 210, which can effectively avoid excessive wear of the fine line protrusion 310, and is beneficial to prolong the service life of the fine line protrusion 310.

[0066] At the same time, the hardness of the high printing protrusion 210 and the fine line protrusion 310 is controlled in the range of 55-65HRC, on the one hand, in order to ensure that the high printing protrusion 210 and the fine line protrusion 310 have a certain strength to meet the pressing composite requirement; on the other hand, to prevent the hardness from being too large to cause the high printing protrusion 210 and the fine line protrusion 310 to be easily broken in the extrusion process.

[0067] In some embodiments, the above-mentioned fine-line convex points 310 can be convex point-shaped, convex line-shaped, hemispherical, or other. Generally, the pressing area of the top surface of the fine-line convex points 310 is not more than 0.3mm 2 , and when the fine-line convex points 310 are convex line-shaped, the length and width of the pressing surface is not more than 0.6mm. The shape and pressing surface of the high-print convex bump 210 can be determined according to the desired printed pattern, and is not specifically limited here. However, it is worth noting that regardless of the shape of the high-print convex bump 210, the pressing surface area is much larger than that of the fine-line convex points 310, so that a series of fine-line points formed by the fine-line convex points 310 can be filled in the pattern formed by the high-print convex bump 210.

[0068] Normally, because the pressing area of the fine-line convex points 310 is smaller than that of the high-print convex bump 210, the fine-line convex points 310 are more easily worn during the extrusion process. Therefore, the hardness of the fine-line convex points 310 is usually designed to be larger to prolong its service life. However, in the present embodiment, because the same high-print convex bump 210 can be extruded with unspecified fine-line convex points 310. In comparison, the extrusion frequency of the high-print convex bump 210 is greater than that of the fine-line convex points 310. Therefore, the fine-line convex points 310 and the high-print convex bump 210 can have the same hardness. Even the hardness of the fine-line convex points 310 can be slightly lower than that of the high-print convex bump 210, to ensure that the wear of the high-print convex bump 210 and the fine-line convex points 310 can be relatively synchronized, so that they can be replaced at the same time. Preferably, the hardness of the fine-line convex points 310 can be controlled within the range of 55-60HRC, for example, 56HRC, 57HRC, 58HRC, 59HRC, etc. The hardness of the high-print convex bump 210 can be controlled within the range of 60-65HRC, for example, 61HRC, 62HRC, 63HRC, 64HRC, etc.

[0069] In some embodiments, because the fine-line convex points 310 are extruded with the high-print convex bump 210 in turn, and the hardness of the fine-line convex points 310 is controlled, the frictional wear of the fine-line convex points 310 is effectively controlled. Therefore, the fine-line convex points 310 can be made smaller, and the pressing area can be less than 0.1mm 2 , for example, 0.02mm 2 , 0.05mm 2 , 0.07mm 2 , 0.09mm 2etc. Smaller pressing area can make more intensive outlining in the area of the printed pattern formed by the high printing protrusions 210, which is equivalent to filling more fine points in the printed pattern area, or in other words, forming more "pixels", thereby effectively improving the printed pattern resolution, making the printed pattern look more realistic and clear. However, if the fine point filling is too dense, visual fatigue will occur when observing, and the printed pattern will not be clear enough. In addition, if the fine point filling is too dense, i.e. the spacing between adjacent fine line protrusions 310 is too small, it will be difficult to form the second interlaced layer 620. In particular, for some kitchen and bathroom paper with relatively thick fibers, if the spacing between adjacent fine line protrusions 310 is too small, the base paper is difficult to be squeezed into the spacing, thereby affecting the formation of the second interlaced layer 620. Therefore, in the present embodiment, the spacing between adjacent fine line protrusions 310 is controlled in the range of 0.08-0.35mm, for example, 0.12mm, 0.22mm, 0.32mm, etc. Preferably, 0.1mm-0.25mm, for example, 0.16mm, 0.22mm, etc. In the present embodiment, by reasonably controlling the size and spacing of the fine line protrusions 310, the clarity of the printed pattern can be ensured, and the formation of the second interlaced layer 620 will not be affected, so as to ensure the firmness of the base paper interlaced.

[0070] Preferably, the fine line protrusions 310 are columnar structures as a whole, and the pressing surface of the fine line protrusions 310 is a square structure. The length and width of the square pressing surface are both 0.1-0.3mm, for example, 0.14mm, 0.22mm, 0.28mm, etc. At the same time, the spacing between adjacent fine line protrusions 310 is controlled in the range of 0.08-0.25mm, for example, 0.12mm, 0.18mm, 0.23mm, etc. Compared with the traditional spherical pressing surface, since the square pressing surface is a plane, the pressing force on the base paper in the entire pressing area of the pressing surface is more uniform, thereby facilitating the guarantee of the interlaced effect.

[0071] Specifically, in the present embodiment, the height of the fine line protrusions 310 is 0.2mm, and the spacing between adjacent fine line protrusions 310 is 0.15mm. The pressing surface of the fine line protrusions 310 is a square structure with a size of 0.2mm*0.2mm. At the same time, in order to prevent the corners of the square pressing surface from scratching the base paper, the corners of the square pressing surface can be rounded.

[0072] Reference Figure 6 As shown in some embodiments, the low printing protrusions 220 form a certain formed pattern, which can be a figure, a character, or a combination of the two. That is, the high printing protrusions 210 and the low printing protrusions 220 can form at least two different patterns with different depths, thereby effectively increasing the richness of the printed paper pattern and having good layering, improving the beauty.

[0073] In some embodiments, the low-printing reliefs 220 do not form a specific pattern, but rather appear as a series of raised dots, which are larger than the fine-printing reliefs 310. In this case, to enrich the appearance of the printed paper, various patterns can be formed by the high-printing reliefs 210. The presence of the low-printing reliefs 220 is to increase the absorbency and abrasion resistance of the printed paper.

[0074] As a distribution method of low-printing raised 220, such as Figure 7 As shown, several low-printing raised areas 220 are distributed to surround the pattern formed by the high-printing raised areas 210. In other words, there is a clear boundary between the distribution area of ​​the low-printing raised areas 220 and the pattern formed by the high-printing raised areas 210, which makes the pattern formed by the high-printing raised areas 210 more prominent and more three-dimensional.

[0075] like Figure 8 As shown, as another distribution method of the low-printing raised bumps 220, the low-printing raised bumps 220 fill the entire area of ​​the pattern roller 200 surface except for the high-printing raised bumps 210. This creates a series of indentations on the entire paper surface, including inside the pattern formed by the high-printing raised bumps 210, thereby maximizing the paper's absorbency and hand feel. It should also be noted that... Figures 6-8 Although specific patterns are given, this is only for the purpose of explanation and should not be taken as the only explanation. The specific patterns are not specifically limited here.

[0076] refer to Figure 9 As shown, in another embodiment of the embossing device, the rubber roller 100 is further abutted against a pre-embossing roller 600, which has a plurality of pre-embossing protrusions 610 for pre-pressing the first base paper 400 before it enters the rubber roller 100 and the pattern roller 200. The plurality of pre-embossing protrusions 610 may form a pattern, or they may not form a pattern but are merely a series of raised dots; of course, these raised dots must also be larger than the fine-texture raised dots 310. When the plurality of pre-embossing protrusions 610 form a pattern, they need to be staggered from the patterns formed by the high-printing protrusions 210 and the low-printing protrusions 220 to prevent damage to the previously formed patterns.

[0077] As one distribution pattern of the pre-pressed flower protrusions 610, such as Figure 11As shown, the pre-embossing protrusions 610 cover the entire surface of the pre-embossing roller 600. Of course, a certain gap must be maintained between the pre-embossing protrusions 610. At this point, the height of the pre-embossing protrusions 610 must be less than the low-printing protrusions 220, so that when the indentations formed by the pre-embossing roller 600 on the base paper are located in the area of ​​the high-printing protrusions 210 or the low-printing protrusions 220, they can be further pressed to form new indentations. The advantage of this design is that it eliminates the need to consider the interference between the indentations (i.e., indentations) formed by the pre-embossing roller 600 and the indentations formed by the high and low printing protrusions. Simultaneously, it maximizes the absorbency and tactile feel of the resulting paper product.

[0078] like Figure 10 As shown, this is another distribution method for the pre-embossing protrusions 610. In this embodiment, the pre-embossing protrusions 610 do not fill the entire area of ​​the roller surface, but leave some blank areas. These blank areas are reserved for the high and low printing protrusions to emboss. The advantage of this distribution method is that a certain printing space has been reserved in advance for the high and low printing protrusions, and it is not necessary to ensure that the height of the pre-embossing protrusions 610 must be less than that of the high and low printing protrusions.

[0079] refer to Figure 12 As shown, this embodiment also provides a printed paper product made by the above-described embossing device, which includes a first base paper 400 and a second base paper 500 stacked together. A series of recesses protruding from the lower surface of the first base paper 400 are pre-pressed onto the first base paper 400. The recesses include at least two types of first recesses 410 and second recesses 420 with different depths, and the recess depth of the first recess 410 is greater than that of the second recess 420. Simultaneously, a glue-free composite area 700 is formed in the overlapping portion between the bottom of the first recess 410 and the second base paper 500.

[0080] For ease of description, the surfaces of the first base paper 400 and the second base paper 500 that are close to each other are defined as their respective lower surfaces, and the surfaces that are far apart from each other are defined as their respective upper surfaces. At the same time, the upper surface of the first base paper 400 is defined as the front side of the laminated printed paper product, and the upper surface of the second base paper 500 is defined as the back side of the laminated printed paper product.

[0081] Specifically, refer to Figure 13As shown, a plurality of first composite positions 710 in the form of fine dots are formed in the glue-free composite region 700. The first composite positions 710 include the third recessed portions 430 on the bottom surface of the first recessed portions 410 and the protruding portions 510 on the second base paper 500. The third recessed portions 430 are actually recessed dots formed on the lower surface of the first recessed portions 410, but do not protrude from the third recessed portions 430. That is, when viewed from the lower surface of the first base paper 400, a plurality of recessed dots are formed on the first recessed portions 410, which are the third recessed portions 430. Although the third recessed portions 430 do not protrude from the top of the third recessed portions 430, the third recessed portions 430 can be seen through the first recessed portions 410 and appear on the first base paper 400 due to the thinness of the paper. When viewed from the upper surface of the first base paper 400, the top of the first recessed portions 410 appears as a series of fine dots. When viewed from the lower surface of the second base paper 500, a series of protruding portions 510 can be seen, and when viewed from the upper surface of the second base paper 500, a series of recessed portions are presented.

[0082] Further, when the distance H between the pressing surface of the high printing protrusion 210 and the roller surface of the fine line roller 300 is less than the thickness of the combined base papers, the base papers entering between the two will also be squeezed, and a plurality of second composite positions 720 will also be formed in the glue-free composite region 700. The second composite positions 720 are actually the lower surfaces of the first base paper 400 and the second base paper 500 adhering to each other, and do not protrude or recess from the surfaces of the base papers. Therefore, when viewed from the front and back surfaces of the composite printing paper product, the second composite positions 720 appear as flat surfaces and do not have recesses or protrusions. At the same time, since the composite strength at the second composite positions 720 is less than that at the first composite positions 710, and the area of the composite positions is small. Therefore, when separating the layers of the printing paper product, it can be clearly felt that there is a certain degree of adhesion between the base papers in the glue-free composite region 700, but it is not clear to distinguish the difference in adhesion in the first composite positions 710 and the second composite positions 720. However, at least it can be observed in the glue-free composite region 700 that in addition to a series of fine dots presented by the first composite positions 710, there are also some blank areas. The fine dots can be understood as the existence of the first composite positions 710, and the blank areas can be understood as the existence of the second composite positions 720.

[0083] In some embodiments, the first recessed portions 410 and the second recessed portions 420 each form a pattern with a certain shape. The pattern can be one or more, depending on actual production needs. At the same time, the pattern can be a graphic or a text, which is not specifically limited here.

[0084] In some embodiments, the first recesses 410 are formed with a patterned design, while the second recesses 420 are not formed with a patterned design, but only present as a series of pits to increase the water absorption and touch of the printed paper product. As one distribution of the second recesses 420, the second recesses 420 are distributed around the patterned design formed by the first recesses 410. That is, the second recesses 420 are distributed in a region that is distinct from the patterned design formed by the first recesses 410, so that the patterned design is more prominent and has a stronger three-dimensional effect.

[0085] As another distribution of the second recesses 420, the second recesses 420 fill the entire region of the first base paper 400 except for the first recesses 410, so that the entire paper surface, including the interior of the patterned design formed by the first recesses 410, is formed with a series of pits, thereby maximizing the water absorption and touch of the paper product.

[0086] In some embodiments, the first base paper 400 is further pre-embossed with a series of fourth recesses (not shown in the figure) before the first recesses 410 and the second recesses 420 are formed. The fourth recesses are formed by the pre-embossing protrusions 610 on the pre-embossing roller 600 in cooperation with the rubber roller 100. The series of fourth recesses can form a patterned design, or can only be a series of pits. When the pre-embossing protrusions 610 form a patterned design, the patterned design is preferably staggered with the patterned designs formed by the high embossing protrusions 210 and the low embossing protrusions 220, so as to prevent interference between the patterned designs and affect the clarity of the patterned designs. When the fourth recesses are a series of pits, and the first recesses 410 and the second recesses 420 are used to form high-low patterns. At this time, the distribution of the second recesses 420, which are also used to form pits, can be referred to, that is, there is a distinct boundary between the fourth recesses and the patterned design, or there is no distinct boundary. It is worth mentioning that in the above embodiments, the first base paper 400 and the second base paper 500 can be single-layer or multi-layer combined paper. When it is multi-layer paper, some or all layers can be pre-embossed one or more times.

[0087] The printed paper product of the embodiment can not only show a plurality of pattern designs when viewed from the front side, but also show the plurality of pattern designs in staggered high and low distribution, has good stereoscopic effect, and can greatly improve the appearance of the printed paper product. Meanwhile, a series of fine points can be observed at the bottom of the pattern design with deep indentation, so as to further improve the clarity of the pattern. In addition, the protruding part 510 on the second base paper is only formed at the bottom of the first recessed part 410, and the first recessed part 410 can form the pattern design. That is, the protruding part 510 actually outlines the pattern design formed by the first recessed part 410. Therefore, when viewed from the back side, the projection of the pattern design formed by the first recessed part 410 can be clearly seen.

[0088] The above description of the present application and its embodiments is illustrative, and is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it, without departing from the spirit of the present application, similar structural forms and embodiments can be designed without creativity, which should belong to the protection scope of the present application.

Claims

1. An embossing device, comprising a rubber roller (100) and a patterned roller (200) that abut against each other, wherein, The pattern roller (200) is provided with at least two types of high-printing protrusions (210) and low-printing protrusions (220) of different heights, characterized in that: the pattern roller (200) also abuts against a fine-textured roller (300), and the fine-textured roller (300) is densely covered with fine-textured protrusions (310); wherein, The distance between the pressing surface of the high-printing protrusion (210) and the roller surface of the fine-textured roller (300) is 0.06-0.28 mm, thereby forming a first pressing area between the high-printing protrusion (210) and the fine-textured protrusion (310); and forming a second pressing area between the high-printing protrusion (210) and the roller surface of the fine-textured roller (300); and, The patterned roller (200) and the fine-line roller (300) have different diameters, so that the same high-printing protrusion (210) can be squeezed and fitted with unspecified fine-line protrusions (310).

2. The embossing device according to claim 1, characterized in that: The hardness of the high-printing raised bump (210) is greater than that of the fine-printed bump (310).

3. The embossing device according to claim 2, characterized in that: The hardness of both the high-printing raised bumps (210) and the fine-textured raised dots (310) is 55-65 HRC.

4. The embossing device according to claim 3, characterized in that: The height of the fine texture protrusion (310) protruding from the surface of the fine texture roller (300) is 0.08-0.25mm; the distance between the pressing surface of the fine texture protrusion (310) and the pressing surface of the high-printing protrusion (210) is 0.01-0.18mm.

5. The embossing device according to claim 4, characterized in that: The pressing area of ​​the fine textured protrusions (310) is less than 0.1 mm. 2 The gap between adjacent fine texture protrusions (310) is 0.08-0.35mm.

6. An embossing device according to any one of claims 1-5, characterized in that: Several high-printing protrusions (210) form a pattern; several low-printing protrusions (220) form a pattern or a series of protrusions.

7. An embossing device according to claim 6, characterized in that: A series of raised dots fill the entire area of ​​the pattern roller (200) except for the high-printing raised dots (210); or, a series of raised dots surround the pattern formed by the high-printing raised dots (210).

8. An embossing device according to claim 6, characterized in that: The rubber roller (100) is also abutted against a pre-embossing roller (600), which has a plurality of pre-embossing protrusions (610); wherein the plurality of pre-embossing protrusions (610) form a pattern or a series of protrusions.

9. An embossing device according to claim 8, characterized in that: The pre-embossed protrusions (610) cover the roller surface of the pre-embossed roller (600); or, blank areas are formed in a plurality of pre-embossed protrusions (610).

10. An embossing device according to claim 9, characterized in that: The height of the pre-embossed protrusion (610) is less than that of the low-printing protrusion (220); when the indentation pressed by the pre-embossed roller (600) is located in the area of ​​the high-printing protrusion (210) and / or the low-printing protrusion (220), it can be further pressed to form a new indentation.

11. An embossing device, comprising a rubber roller (100) and a pattern roller (200) that abut against each other, wherein, The pattern roller (200) is provided with at least two types of high-printing protrusions (210) and low-printing protrusions (220) of different heights. The pattern roller (200) is characterized by further abutting against a fine-textured roller (300), the fine-textured roller (300) having a densely distributed array of fine-textured protrusions (310). The indentations formed by the fine textured bumps (310) on the paper are filled within the indentations formed by the high-printing bumps (210); The patterned roller (200) and the fine-textured roller (300) have different diameters, allowing the same high-printing protrusion (210) to be press-fitted with unspecified fine-textured protrusions (310); and, A first pressing area for squeezing the incoming base paper is formed between the high-printing protrusion (210) and the fine-textured protrusion (310); a second pressing area for squeezing the incoming base paper is formed between the high-printing protrusion (210) and the roller surface of the fine-textured roller (300).

12. A printed paper product comprising a first base paper (400) and a second base paper (500) stacked together, wherein a series of recesses are pre-pressed onto the first base paper (400), characterized in that: The recessed portion includes at least two types of recesses of different depths: a first recess (410) and a second recess (420); wherein, A glue-free composite area (700) is formed in the overlapping portion between the bottom of the first recess (410) and the second base paper (500); a plurality of first composite positions (710) in the form of fine dots are formed in the glue-free composite area (700), and a plurality of second composite positions (720) are formed in the non-first composite positions (710) area of ​​the glue-free composite area (700).

13. A printed paper product according to claim 12, characterized in that: Several first recesses (410) form a pattern with a certain shape; several second recesses (420) form a pattern or a series of recesses.

14. A printed paper product according to claim 13, characterized in that: A series of dimples cover the entire area of ​​the first base paper (400) that is not the first recess (410); or, there is a clear boundary between the pattern formed by the series of dimples and the first recess (410).

15. A printed paper product comprising a first base paper (400) and a second base paper (500) stacked together, wherein a series of recesses are pre-pressed onto the first base paper (400), characterized in that: The recessed portion includes at least two types of first recessed portions (410) and second recessed portions (420) of different depths. A glue-free composite area (700) is formed in the overlapping portion between the bottom of the first recess (410) and the second base paper (500); a plurality of first composite positions (710) in the form of fine dots are formed in the glue-free composite area (700). The first composite position (710) includes a third recess (430) located on the bottom surface of the first recess (410) and a protrusion (510) located on the second base paper (500).

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