Composite curved corrugated paper

Abstract

The utility model provides composite curve type corrugated paper, and belongs to the technical field of packaging paper structures. The composite curve type corrugated paper comprises a corrugated structure, the corrugated structure extends on the surface of the corrugated paper to form a composite curve composed of a straight line section and an arc line section, the composite curve comprises a plurality of composite curve units which are continuously arranged, and the composite curve units are arranged on the surface of the corrugated paper. Each composite curve unit comprises a first arc segment arranged at a wave crest, a second arc segment arranged at a wave trough and a straight line segment connected with the first arc segment and the second arc segment. The corrugated board has the beneficial effects that the edge pressure strength and the non-deformability of the corrugated board are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing paper structure technical field, concretely relates to a compound curve type corrugated paper. BACKGROUND

[0002] The corrugation of the traditional corrugated paperboard extends in a straight line on the surface of the corrugated paper, so the corrugated paper presents a shape of straight line parallel on the surface of the corrugated paper, as shown in the drawing. Figure 1 The structure has the following defects:

[0003] 1. The corrugated paperboard has a very high edge pressure strength along the extension direction of the corrugation, but the edge pressure strength perpendicular to the extension direction of the corrugation is very weak;

[0004] 2. The corrugated paperboard has a higher anti-deformation ability along the extension direction of the corrugation, but is particularly prone to bending deformation perpendicular to the extension direction of the corrugation;

[0005] 3. When a local part of the corrugated paperboard surface is subjected to pressure, the local pressure part will wrinkle and collapse along the extension direction of the corrugation and extend, reducing the external appearance and packaging protection.

[0006] In the prior art, in order to improve the edge pressure strength perpendicular to the extension direction of the corrugation, the structure of the traditional corrugated paperboard is optimized, for example, the patent document with the patent name of S-shaped corrugated paper and the publication number of CN205115918U discloses a new type of corrugated paper, and the improvement proposed by the patent document is that the core paper structure extends in an S-shaped corrugation 1 on the surface of the corrugated paper, instead of the straight line type extension of the traditional corrugated paper, and the S-shaped corrugation is arranged at equal intervals and covers the corrugated paper, the S-shaped corrugation is formed by a plurality of continuous curved arcs, and the cross section of the side edge 2 is also S-shaped, as shown in the drawing. Figure 2

[0007] The prior art improves the strength of the corrugated paper in the horizontal and vertical directions on the surface of the corrugated paper by improving the structure of the extension direction of the corrugation, and also increases the adhesion area, so that the corrugated paperboard is more solid, the stress is uniform, and the deformation is not easy. However, compared with the traditional straight line type corrugated paper, the structure can only improve the edge pressure strength perpendicular to the extension direction of the core paper corrugation to a certain extent, but the edge pressure strength of the corrugated paperboard along the extension direction of the corrugation will be greatly reduced. In addition, although the bearing capacity of a single curved arc is strong, in the technology, the curved arcs are staggered in opposite directions to form continuous curves, and the stress dispersion capacity of the curves is poor, the bearing capacity is weak, and the result is that when the curved arc is subjected to pressure perpendicular to the extension direction of the corrugation, stress concentration is easily formed with the curved arc as the center, and the structure of the corrugated paperboard in this direction is still prone to collapse, and the improvement of the edge pressure strength is limited. UTILITY MODEL CONTENTS

[0008] ​The utility model provides a kind of composite curve type corrugated paper, make the effective enhancement of side pressure intensity of corrugated paper in the direction of vertical corrugation extension, improve overall deformation resistance, and effectively solve the problem that local plane is easily wrinkled collapse when being subjected to greater pressure.

[0009] The utility model composite curve type corrugated paper, the corrugated paper includes corrugated structure, the corrugated structure extends on the surface of the corrugated paper, forms a composite curve consisting of straight line segment and arc segment, the composite curve includes a plurality of continuously arranged composite curve units, the composite curve unit includes first arc segment arranged in wave crest, second arc segment arranged in wave trough, and straight line segment connecting the first arc segment and second arc segment.

[0010] Further, the junction between the first arc segment and the straight line segment, and the junction between the second arc segment and the straight line segment are continuously arranged with first derivative.

[0011] Further, the tangent line of the first arc segment at the junction with the straight line segment coincides with the straight line segment, and the tangent line of the second arc segment at the junction with the straight line segment coincides with the straight line segment.

[0012] Further, an included angle is formed between the straight line segment and the extension direction of the corrugated structure, and the included angle ranges from 20 to 45 degrees.

[0013] Further, the vertical distance L between the wave crest and the wave trough ranges from 5 to 20 mm.

[0014] Further, the spacing between two adjacent wave crests or two adjacent wave troughs ranges from 15 to 50 mm.

[0015] Further, each composite curve unit has the same shape, and the composite curve units are repeatedly arranged in the extension direction of the corrugated structure according to a set rule.

[0016] Further, the first arc segment and the second arc segment are both circular arcs, and the radius of the circular arcs ranges from 3 to 15 mm.

[0017] Further, the corrugated paper further includes a first cross section perpendicular to the extension direction of the corrugated structure, and the corrugated structure is arranged in a W-shaped or S-shaped wave in the first cross section.

[0018] Further, the S-shaped wave is a sine wave or a cosine wave.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The corrugated paper of the utility model will not form stress concentration under the condition of external force, the edge pressure strength perpendicular to the corrugated extension direction is greatly improved, the edge pressure strength parallel to the corrugated extension direction is reduced to a smaller extent, so that the pain point of traditional straight corrugated paper, which is extremely strong in one direction and extremely weak in another direction, can be improved, and the corrugated paperboard of the utility model has bidirectional balanced edge pressure strength along the corrugated extension direction and the direction perpendicular to the corrugated extension direction of the core paper, so that the utility model has higher strength and better buffering performance, and can well protect the internal articles.

[0021] In addition, the composite curve composed of the straight line segment and the arc segment, and the arc transition section make the straight line segment connection smooth transition, and when the corrugated paper pit roller is processed, the feasibility is stronger, and when the corrugated paper is manufactured, it is easier to roll into a shape, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the scheme of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 It is a structure schematic view of traditional corrugated paperboard;

[0024] Figure 2 It is a structure schematic view of corrugated paperboard with S-shaped corrugated extension direction;

[0025] Figure 3 It is a structure schematic view of the utility model composite curve type corrugated paper;

[0026] Figure 4 It is a structure schematic view of the utility model composite curve type corrugated paper end face;

[0027] Figure 5 It is a structure schematic view of one embodiment of the utility model composite curve unit;

[0028] Figure 6 It is a structure schematic view of another embodiment of the utility model composite curve unit.

[0029] Reference signs:

[0030] 1-S-shaped corrugation, 2-side edge, 3-corrugated structure, 4-end face, 301-composite curve, 3011-first arc segment, 3012-straight line segment, 3013-second arc segment. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the description and drawings are to be regarded as illustrative in nature and are not to be regarded as limiting the scope of the application; the summary of the application and the claims and the accompanying drawings explain the terms "comprising," "having," "including," and the like, are to be construed as open-ended, not limiting of any sequence, number, component or process, but are intended to cover any and all sequences, numbers, components or processes. The terms "first," "second," and the like, as used herein do not have any specific chronology or order unless otherwise defined.

[0032] Reference to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a common or identical embodiment, although they can be.

[0033] For those skilled in the technical field, the technical solutions of the present application will be better understood from the following description of the embodiments of the present application in conjunction with the accompanying drawings.

[0034] As shown in Figures 3-6 The corrugated paper of the present application comprises a corrugated structure 3 extending in a certain direction on the surface of the corrugated paper to form a composite curve 301 composed of a straight line segment and an arc segment, the composite curve 301 comprises a plurality of continuously arranged composite curve units, the composite curve units comprise a first arc segment 3011 arranged at a wave crest, a second arc segment 3013 arranged at a wave trough, and a straight line segment 3012 connecting the first arc segment 3011 and the second arc segment 3013.

[0035] The design principle of the "straight line segment + arc segment" composite curve is based on the synergistic effect of high rigidity straight line segment and smooth arc transition, aiming to improve the bidirectional edge pressure strength of the corrugated paper. The rigidity of the straight line is the strongest, compared with the curve with an arc, the design of the straight line segment will effectively improve the bidirectional edge pressure strength of the corrugated paper. However, if the straight line is completely used without arc transition, the bidirectional edge pressure strength of the corrugated paper will only be strong without buffering, which will be quickly crushed under strong pressure, which is not conducive to the protection of the internal product, and also has no fatigue resistance, and the sharp corners formed at the corner fold lines are easy to cause the rupture of the surface paper and the back paper matched with the corrugated paper, affecting the appearance effect. The arc segment transition can significantly improve these problems.

[0036] The composite curve of the present application has the following advantages:

[0037] 1. effectively improve the edge pressure strength: from the perspective of material mechanics, the cross-sectional moment of inertia of the straight line segment is larger than that of the S-shaped arc line, the compression deformation resistance is stronger, and the edge pressure strength of the straight line segment is higher than that of the arc line of the same length, so that the utility model can directly improve the bidirectional edge pressure strength of the corrugated paper;

[0038] 2. effectively improve the deformation resistance: when the corrugated paper of the utility model is subjected to external force impact, stress can be transmitted from the arc segment to the straight line segments on both sides, effectively dispersing the stress and avoiding the stress concentration problem caused by the single circular arc of the S-shaped corrugation, thereby effectively improving the deformation resistance;

[0039] 3. stronger feasibility, greatly improving production efficiency: the utility model is not prone to "corrugation deformation uneven" problem during corrugation, the arc transition segment enables the straight line segment to realize smooth transition, the processing feasibility is enhanced, and the production efficiency can be improved; the processing difficulty of the "straight line segment + arc transition" composite curve unit groove is much lower than that of the sinusoidal curve with complex curvature, and the processing feasibility is stronger.

[0040] The corrugated paper of the utility model is completely the same as the traditional corrugated paper in other aspects of the technical scheme and processing method except for the different composite curve shape, which will not be described here. As shown in the figure, Figure 4 The corrugated paper of the utility model further comprises a first cross section or end surface 4 perpendicular to the extension direction of the corrugated structure, and the corrugated structure is provided in a W-shaped or S-shaped wave on the first cross section and the end surface 4. Preferably, the S-shaped wave of the present example is a sinusoidal wave or a cosine wave, so that the stress concentration problem of the surface pressure can be avoided.

[0041] As shown in the figure, Figure 5 The utility model takes the transverse middle part of the surface composite curve of the corrugated paper as the x-axis and takes the y-axis as an example along the vertical direction of the x-axis of the corrugated paper surface to specifically describe the composite curve of the utility model.

[0042] This example shows one of the composite curve unit embodiments, the length of the composite curve unit is T, two straight line segments 3012 and one complete wave crest are arranged, the wave crest forms a first arc segment 3011, one of the two straight line segments 3012 is located on the left side of the first arc segment 3011 and is a straight line of the rising segment, and the other is located on the right side of the first arc segment 3011 and is a straight line of the descending segment, and the two straight line segments 3012 bear the main compression load.

[0043] The first arc segment 3011 is connected to the two straight line segments 3012 smoothly, in one period T, the second arc segment 3013 is divided into two segments in the middle and is located at the end of the two straight line segments 3012, the first arc segment 3011 and the second arc segment 3013 of the example are beneficial to eliminating the stress of the corner, and when stress is received, the stress can be quickly transmitted to the two straight line segments 3012, and stress concentration is effectively avoided.

[0044] The shapes of the various composite curve units are the same, and the composite curve units are arranged repeatedly in a set rule in the extension direction of the corrugated structure.

[0045] As shown in the figure, Figure 6 As another embodiment of the utility model, the composite curve unit of the example is divided in the middle of the straight line segment, so that the composite curve unit contains a complete first arc segment 3011 and a second arc segment 3013, the straight line segment 3012 is connected to the first arc segment 3011 and the second arc segment 3013, the straight line segment on the left side of the first arc segment 3011 is connected to the straight line segment of the adjacent composite curve unit, and a complete straight line segment is formed, and the straight line segment on the right side of the second arc segment 3013 is connected to the straight line segment of the adjacent composite curve unit, and a complete straight line segment is formed.

[0046] Of course, the utility model can also be divided in the middle of the wave crest, etc., and the point to be emphasized is that the utility model represents the same corrugated structure 3 no matter how it is divided.

[0047] Preferably, the connection between the first arc segment and the straight line segment of the example, and the connection between the second arc segment and the straight line segment are provided with first derivative continuity, so that the first arc segment 3011 and the straight line segment 3012, and the second arc segment 3013 and the straight line segment 3012 realize smooth transition at the junction points, and stress concentration is avoided.

[0048] Preferably, the tangent line of the junction point of the first arc segment and the straight line segment coincides with the straight line segment, and the tangent line of the junction point of the second arc segment and the straight line segment coincides with the straight line segment.

[0049] The straight line segment 3012 of the example forms an included angle a with the x-axis in the extension direction of the corrugated structure 3, and the included angle a is preferably 20-45 degrees, which effectively balances the rigidity and processing difficulty of the corrugated paper.

[0050] Preferably, the vertical distance L between the wave crest and the wave trough of the example is 5-20mm, and the spacing T between the adjacent two wave crests or the adjacent two wave troughs is preferably 15-50mm, which meets the food buffering and packaging requirements.

[0051] Preferably, the first arc segment 3011 and the second arc segment 3013 of the present example are both circular arcs, and the radius of the circular arc is in the range of 3-15mm, so as to better realize smooth transition with the straight line segment.

[0052] As the third embodiment of the present application, each composite curve unit of the present example is provided with different lengths, and the length T of the composite curve unit is relatively short in the area that needs to be strengthened and protected, so that the composite curve unit of the present application is more dense, and the length T of the composite curve unit is relatively long in other areas, so as to balance the cost and rigidity.

[0053] From the above, compared with the prior art, the beneficial effects of the present application are:

[0054] The corrugated paper of the present application will not form stress concentration under the action of external force, the edge pressure strength perpendicular to the corrugated extension direction is greatly improved, the edge pressure strength parallel to the corrugated extension direction is reduced to a smaller extent, and the corrugated paperboard has bidirectional balanced edge pressure strength along the corrugated extension direction and perpendicular to the corrugated extension direction of the core paper. Thus, the present application has high strength, good buffering performance, and can well protect the internal articles.

[0055] In addition, the composite curve composed of the straight line segment and the arc segment realizes smooth transition at the connection of the straight line segment by the circular arc transition segment, and the feasibility is stronger when the corrugated paper is processed by the pit roller, and the corrugated paper is more easily formed by rolling when the corrugated paper is manufactured, so that the production efficiency is greatly improved.

[0056] The above-mentioned specific embodiments are the preferred embodiments of the present application, and are not intended to limit the specific implementation range of the present application, and the scope of the present application includes but is not limited to the specific embodiments, and any equivalent changes made according to the present application are within the protection scope of the present application.

Claims

1. A composite curved corrugated paper, wherein the composite curved corrugated paper comprises a corrugated structure, characterized in that: The corrugated structure extends on the surface of the corrugated paper to form a composite curve composed of straight line segments and arc segments. The composite curve includes several continuously arranged composite curve units. Each composite curve unit includes a first arc segment set at the crest, a second arc segment set at the trough, and a straight line segment connecting the first arc segment and the second arc segment.

2. The composite curved corrugated paper according to claim 1, characterized in that: The connection points between the first arc segment and the straight line segment, and between the second arc segment and the straight line segment, are continuously set with first derivatives.

3. The composite curved corrugated paper according to claim 2, characterized in that: The tangent of the first arc segment at the point of connection with the straight line segment coincides with the straight line segment, and the tangent of the second arc segment at the point of connection with the straight line segment coincides with the straight line segment.

4. The composite curved corrugated paper according to claim 1, characterized in that: The straight segment forms an angle with the extension direction of the corrugated structure, and the angle ranges from 20 to 45 degrees.

5. The composite curved corrugated paper according to claim 1, characterized in that: The vertical distance L between the crest and trough is 5-20 mm.

6. The composite curved corrugated paper according to claim 1, characterized in that: The distance between two adjacent peaks or two adjacent troughs is 15-50mm.

7. The composite curved corrugated paper according to claim 6, characterized in that: Each composite curve unit has the same shape, and the composite curve units are repeatedly set according to a set rule in the extension direction of the corrugated structure.

8. The composite curved corrugated paper according to claim 1, characterized in that: Both the first and second arc segments are circular arcs with a radius of 3-15mm.

9. The composite curved corrugated paper according to any one of claims 1-8, characterized in that: The corrugated paper also includes a first section perpendicular to the extension direction of the corrugated structure, wherein the corrugated structure is arranged in a W-shaped or S-shaped wave pattern in the first section.

10. The composite curved corrugated paper according to claim 9, characterized in that: The S-shaped wave is a sine wave or a cosine wave.

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