CN114368210A - Reinforced frameless paper tube sandwich board - Google Patents

Reinforced frameless paper tube sandwich board Download PDF

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Publication number
CN114368210A
CN114368210A CN202210044940.5A CN202210044940A CN114368210A CN 114368210 A CN114368210 A CN 114368210A CN 202210044940 A CN202210044940 A CN 202210044940A CN 114368210 A CN114368210 A CN 114368210A
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China
Prior art keywords
circular tube
tube
reinforced
paper
frameless
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CN202210044940.5A
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Chinese (zh)
Inventor
姜夏旺
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Hunan University of Technology
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Hunan University of Technology
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Priority to CN202210044940.5A priority Critical patent/CN114368210A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
    • A47B96/20—Furniture panels or like furniture elements
    • A47B96/205—Composite panels, comprising several elements joined together
    • A47B96/206—Composite panels, comprising several elements joined together with laminates comprising planar, continuous or separate layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/12—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/20—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side of hollow pieces, e.g. tubes; of pieces with channels or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2479/00—Furniture

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a reinforced frameless paper tube sandwich board which comprises a bottom plate, a panel and a core layer arranged between the bottom plate and the panel, wherein the core layer is formed by arranging a plurality of round tubes with the same height, the axes of the round tubes are vertical to the bottom plate and the panel, and the round tubes in the same transverse direction are parallel to the round tubes in the adjacent transverse direction. According to the core plate structure, the novel core plate structure is designed, and the problem that the mechanical strength of the core plate structure is reduced due to structural collapse caused by weak bearing capacity of a certain structure is solved by utilizing the uniform distribution of the circular tube structures and the same tension on the circumferences of the circular tubes. The sandwich board has good mechanical strength, and can greatly reduce the weight of furniture and realize the light weight and the greening of paper furniture products.

Description

Reinforced frameless paper tube sandwich board
Technical Field
The invention relates to the technical field of paper substrate layer structures, in particular to a reinforced frameless paper tube sandwich board.
Background
Along with the improvement of the consciousness of 'green and environment protection', people increasingly worship natural, environment-friendly, green and healthy furniture materials. In order to meet the requirements of the modern furniture industry on greenization, light weight and multiple functions and reduce production cost, the research of new materials with more excellent performance is urgently needed in various industries. The paper material as a green environment-friendly material has been developed and matured in aspects of packaging design, three-dimensional models, buildings and the like so far, has certain development in furniture surface decoration materials, and is still in the starting stage as a furniture material, and needs to be continuously developed, innovated and developed.
With the development of material science and furniture industry, the sandwich structure composite material as a typical representative of new materials has the characteristics of light weight, high production efficiency, energy conservation and the like, and has higher specific strength, specific rigidity and designability compared with a homogeneous solid plate. The sandwich structure is composed of three parts, namely an upper layer panel, a lower layer panel and a middle core layer. The upper and lower thinner face sheets are primarily responsible for carrying bending, torsion and various in-plane loads, and the core layer, which is intimately bonded to the face sheets, is primarily responsible for transmitting compressive and planar shear loads. In paper furniture, sandwich structures may be classified into corrugated paper sandwich panels, honeycomb paper sandwich panels and square sandwich panels according to the type of the sandwich structure. Although the strength of the corrugated core structure in the corrugated sandwich board is improved to a certain extent compared with that of a single paperboard, the corrugated core structure has better buffering performance, but the corrugated core structure still cannot reach the use strength of the clamp board, and is mainly used for packaging materials. The honeycomb sandwich structure is a novel composite material which is widely concerned in recent years, the panel of the honeycomb sandwich structure is a main stressed part, the core plays a role in separating and supporting an upper panel and a lower panel, the honeycomb type paperboard is hexagonal, the honeycomb type paperboard is limited by the limitation of unit area, aperture and the like, the strength of the honeycomb type paperboard is reduced along with the increase of the height, and the honeycomb type paperboard does not meet the use requirement of a part of structure in furniture. The honeycomb core plate of improved hexagonal structure disclosed in application No. 2017102577784 and the forming method thereof disclose that providing S-shaped reinforcing edges in hexagonal honeycomb cells increases the strength of each hexagonal unit cell, thereby increasing the compressive strength of the honeycomb core plate. Based on the structural characteristics of the honeycomb type, the compressive strength of the improved honeycomb core plate is still difficult to break through, the limited application range is achieved, and meanwhile, the application development of the paper clamp is also limited.
Disclosure of Invention
The invention aims to solve the technical problem that the strength of corrugated core boards and honeycomb core boards in the prior art cannot meet the requirement of paper furniture, and provides a reinforced frameless paper tube sandwich board.
The purpose of the invention is realized by the following technical scheme:
the reinforced frameless paper tube sandwich board comprises a bottom plate, a face plate and a core layer adhered between the bottom plate and the face plate, wherein the core layer is formed by arranging a plurality of round tube cells with the same height in parallel and/or in a straight line, and the outer walls of round tubes of adjacent round tube units are mutually adhered to form a porous core layer; the circular tube cell element is formed by one or more circular tube units which are adhered together, and the axis of each circular tube unit is perpendicular to the bottom plate and the panel. According to the sandwich panel, the novel core plate structure is adopted, the circular pipe is adopted as the basic structure, the circular radian can generate stress dispersion when the honeycomb structure is stressed, the defect that stress concentration is caused when the honeycomb structure is stressed is overcome, and the bearing performance of the sandwich panel is improved.
Furthermore, the first circular tube cell and the second adjacent circular tube cell are arranged in a staggered manner, and the circular tube unit of the first circular tube cell and the circular tube unit of the second adjacent circular tube cell have two bonding points. Taking a circular tube cell unit formed by combining two circular tube units as an example, wherein the circular tube unit is adhered to two parallel and adjacent circular tube units, and the centers of circles of the three circular tube unit combinations form a triangular structure.
Further, the first circular tube cell and the second adjacent circular tube cell are arranged in parallel, and a single circular tube unit of the first circular tube cell and a circular tube unit of the second circular tube cell have an adhesive point. Taking the circular tube cell unit formed by combining two circular tube units as an example, the circular tube cell unit is combined with the parallel and adjacent circular tube unit, and the centers of four circular tubes in the two units form a square structure.
Furthermore, the height of the circular tube unit is 1-3 cm, the circular tube unit and the sandwich board with the honeycomb structure have different tendency of decreasing along with the increase of the height, the influence of the height of the circular tube on the flat-pressing strength, the side-pressing strength and the bending strength of the whole sandwich board is not obviously different, and the sandwich boards with different thicknesses can be prepared according to actual needs.
Further, the wall thickness of the circular tube unit is 2-5 mm, and in the range, along with the increase of the wall thickness of the circular tube, the flat compression strength and the side compression strength of the sandwich plate are improved, but the compression strength is reduced. Preferably, the wall thickness of the circular tube is 3mm, and the circular tube has good bending strength on the basis of meeting the flat compression strength and the side compression strength of the sandwich panel.
Furthermore, the aperture of the circular tube unit is 30-60 mm, and the flat compression strength, the side compression strength and the bending strength of the sandwich board all tend to be reduced along with the increase of the aperture of the circular tube. Preferably, the aperture of the circular tube is 30mm, so that the sandwich plate can keep better use strength.
Further, the material of the panel and/or the bottom plate comprises one or more of a metal plate, a plastic plate, a wood plate or a cardboard.
Furthermore, the surface plate is made of kraft paper, the thickness of the surface plate is 1-3 mm, the bending strength of the surface plate on the sandwich plate is not greatly influenced, and the thickness of the surface plate is preferably 3mm according to the changes of the flat-pressing strength, the variable-pressure strength and the elastic modulus of the surface plate on the sandwich plate.
Furthermore, the core layer is provided with reinforcing ribs, so that the compressive resistance of the core plate structure is further improved through the reinforcing ribs, and the service strength of the large-area core plate structure is ensured.
Further, the reinforcing ribs penetrate through the round pipes on the same straight line on the same or different units, namely, the reinforcing ribs transversely, longitudinally or obliquely penetrate through the round pipes in uniform arrangement.
Further, the bottom plate and/or the face plate are bonded or coated with a waterproof material.
The preparation method of the reinforced frameless paper tube sandwich panel comprises the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the round tube units with adjacent round tube units to form a round tube cell structure, and sequentially arranging the round tube cell structures to form triangular or rectangular arrangement to obtain a core layer structure of the sandwich board;
s2, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
Furthermore, the core layer structure in S1 is further provided with reinforcing ribs, holes are punched in the vertical direction of the bonded core layer cell structure, and then the reinforcing ribs are implanted into the holes to form a core layer reinforced cell structure;
furthermore, in the triangular arrangement structure, the punching direction of the core layer forms an included angle of 60 degrees with the length direction of the sandwich plate, and forms an included angle of 60 degrees with the vertical direction of the width direction of the sandwich plate.
Further, in the rectangular arrangement structure, the punching direction of the core layer is parallel to the length direction of the sandwich panel and perpendicular to the width direction of the sandwich panel.
The reinforced frameless paper tube sandwich panel is used for paper-based furniture, and is particularly used for a panel structure of the paper-based furniture.
Compared with the prior art, the beneficial effects are:
according to the novel core plate structure, the problem that the mechanical strength of the core plate structure is reduced due to collapse of a support structure and even chain reaction caused by weak bearing capacity of a certain structure is solved by designing the novel core plate structure and utilizing the same tension on the circumference of the novel core plate structure through the uniformly distributed circular tube structure.
The sandwich panel has the advantages that the sandwich panel can be ensured to have good mechanical strength and reach the use standard through the arrangement mode of the circular tubes in the sandwich layer and the influence rule of the diameter of the paper tubes, the thickness of the paper tubes, the hollow depth of the paper tubes and the like on the mechanical property of the sandwich structure, the weight of furniture can be greatly reduced compared with the existing solid template structure, the requirements of the modern furniture industry on greenness, light weight and multiple functions are met, and the production cost is reduced.
Drawings
FIG. 1 is a schematic view of the sandwich panel structure of the present invention (arranged in a triangle);
FIG. 2 is a schematic view of the reinforcing structure of the sandwich panel reinforcing ribs (arranged in a triangle shape) of the present invention;
FIG. 3 is a schematic view of a sandwich panel construction of the present invention (in a rectangular arrangement);
fig. 4 is a schematic view (rectangular arrangement) of the reinforcing structure of the sandwich panel reinforcing rib of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly. If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a reinforced frameless paper tube sandwich panel comprising a base plate 3, a face plate 1 and a core layer 2 adhered between the base plate and the face plate. The core layer 2 is formed by uniformly arranging a plurality of round pipes with the same height, and the axis of each round pipe is vertical to the bottom plate and the panel. The preparation method comprises the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the outer walls of the round tube units and the adjacent round tube units to form round tube cell structures, and sequentially arranging the round tube cell structures to form triangular arrangement, namely, two round tubes which are contacted with one round tube assembly at the same side and adjacent to one round tube assembly have two bonding points, and the circle centers of the three round tubes are arranged in a triangular manner to obtain a core layer structure of the sandwich plate;
s3, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
Example 2
Referring to fig. 2, the present embodiment provides a method for manufacturing a reinforced paper tube sandwich composite board according to embodiment 1, including the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the round tube units with adjacent round tube units to form a round tube cell structure, and sequentially arranging the round tube cell structures to form a triangular arrangement structure to obtain a core layer structure of the sandwich board;
s2, arranging a reinforcing rib: punching holes in the bonded cell structures of the core layer in the vertical direction, wherein the punching direction of the core layer forms an included angle of 60 degrees with the length direction of the sandwich board and forms an included angle of 60 degrees with the width direction of the sandwich board, and then implanting reinforcing ribs into the holes to form the reinforced cell structures of the core layer;
s3, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
Example 3
As shown in fig. 3, the present embodiment provides a reinforced frameless paper tube sandwich panel comprising a base plate 3, a face plate 1 and a core layer 2 adhered between the base plate and the face plate. The core layer 2 is formed by uniformly arranging a plurality of round pipes with the same height, and the axis of each round pipe is vertical to the bottom plate and the panel. The preparation method comprises the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the outer walls of the round tube units and the adjacent round tube units to form round tube cell structures, sequentially arranging the round tube cell structures to form rectangular arrangement, namely, arranging one bonding point on one round tube unit in a certain round tube cell and one round tube unit in contact with another round tube cell on the same side, and arranging four round tube units of two round tube cells in a rectangular manner to obtain a core layer structure of the sandwich plate;
s3, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
Example 4
Referring to fig. 4, the present embodiment provides a method for manufacturing a reinforced paper tube sandwich composite board according to embodiment 3, including the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the round tube units with adjacent round tube units to form a round tube cell structure, and sequentially arranging the round tube cell structures to form a rectangular arrangement structure to obtain a core layer structure of the sandwich board;
s2, arranging a reinforcing rib: punching holes in the vertical direction of the bonded cell structures of the core layer, wherein the punching direction of the core layer is parallel to the length direction of the sandwich board and is vertical to the width direction of the sandwich board, and then implanting reinforcing ribs into the holes to form the reinforced cell structures of the core layer;
s3, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
Experimental example 1
Based on the sandwich plate structure of the reinforced frameless paper tube in embodiments 1-2, under the condition of kraft paper with the height of the paper tube of 15mm, the diameter of the paper tube of 30mm, the wall thickness of the paper tube of 2mm and the thickness of the panel and the bottom plate of 2mm, the flat crush strength is tested according to GB/T1453-:
TABLE 1
Figure BDA0003471756660000061
Figure BDA0003471756660000071
As can be seen from table 1 above, the reinforced frameless paper tube sandwich panel structure of the present invention has a much higher flat compressive strength than the honeycomb paper tube sandwich panel structure of the same material, and also has an excellent bending strength. In the type of the sandwich board adopting the round tubes as the core layer, the performance of the paperboard adopting the triangular arrangement mode of the round tubes in the core layer is obviously superior to that of the paperboard adopting the rectangular arrangement mode.
Experimental example 2
1. Performance testing of different paper tube heights
Under the condition of kraft paper with a triangular arrangement mode, a paper tube diameter of 30mm, a paper tube wall thickness of 2mm and a panel thickness of 2mm, the performance of the reinforced frameless paper tube sandwich board obtained by adopting round tubes with different heights is shown in the following table 2:
TABLE 2
Figure BDA0003471756660000072
Figure BDA0003471756660000081
As is clear from table 2, in the sandwich panel having a paper tube height of 1cm in the core layer, the average values of the flexural strength and the elastic modulus in the flat crush strength, the side crush strength and the bending strength were 30.55MPa, 16.02MPa, 1.77MPa and 164.24MPa, respectively, and the average values of the mechanical strengths having a paper tube height of 2cm and 3cm were 28.68MPa, 16.55MPa, 1.72MPa, 163.79MPa, 31.2MPa, 17.81MPa, 1.69MPa and 134.16MPa, respectively, and the data of the mechanical strengths of the three were not different from each other. Therefore, the influence of the height of the circular tube in the core layer on the mechanical property of the whole sandwich plate is not large, and the height of the sandwich plate can be freely adjusted according to the requirement.
2. Performance testing of different paper tube wall thicknesses
Under the condition of kraft paper with a triangular arrangement mode, a paper tube height of 15mm, a paper tube diameter of 30mm, a paper tube wall thickness of 2mm and a panel thickness of 2mm, the performance of the reinforced frameless paper tube sandwich panel obtained by adopting round tubes with different wall thicknesses is shown in the following table 3:
TABLE 3
Figure BDA0003471756660000082
Figure BDA0003471756660000091
From the above table 3, in the range of the wall thickness of 2-3, along with the increase of the wall thickness of the circular tube, the flat compression strength of the sandwich plate is increased, the bending strength is decreased, the side compression strength and the elastic modulus are decreased firstly and then increased, and the overall performance change is not uniform. According to the data, the wall thickness of the selected circular tube is 3mm, so that the circular tube has high flat compression strength and good side compression strength and elastic modulus.
3. Performance testing of different paper tube apertures
Under the condition of kraft paper with a triangular arrangement mode, a paper tube height of 15mm, a paper tube wall thickness of 2mm and a panel thickness of 2mm, the performance of the reinforced frameless paper tube sandwich board obtained by adopting round tubes with different diameters is shown in the following table 4:
TABLE 4
Figure BDA0003471756660000092
Figure BDA0003471756660000101
As can be seen from table 4, as the hole diameter of the circular tube increases, the flat crush strength decreases significantly, the edge crush strength decreases slightly, the difference in the change in the bending strength is small, and the difference in the change in the elastic modulus is large. Therefore, according to the comprehensive mechanical properties, the aperture of the selected round tube is 30 mm.
4. Performance testing of different paper tube apertures
The arrangement mode is triangular, the height of the paper tube is 15mm, the diameter of the paper tube is 30mm, the wall thickness of the paper tube is 2mm, and the performance of the reinforced frameless paper tube sandwich board obtained by adopting kraft paper panels with different thicknesses is shown in the following table 5:
TABLE 5
Figure BDA0003471756660000102
Figure BDA0003471756660000111
As can be seen from table 5 above, as the thickness of the panel increases, the flat crush strength, edge crush strength and bending strength of the sandwich panel all tend to increase, and therefore, 3mm kraft paper was selected as the panel.
5. Quadrature test
Under the condition of determining the thickness of the sandwich panel, that is, under the condition that the height of the paper tube is 15mm, orthogonal tests are carried out on the thickness of the sandwich panel and the wall thickness and the pore diameter of the paper tube in the core layer, and the performances of the obtained reinforced frameless paper tube sandwich panel are shown in table 6:
TABLE 6
Figure BDA0003471756660000112
Figure BDA0003471756660000121
Figure BDA0003471756660000131
The parameters of the thickness of the panel and the wall thickness and the pore diameter of the paper tube in the core layer used in each group are as follows:
Figure BDA0003471756660000132
Figure BDA0003471756660000141
from the specific test data measured in table 6, the average value was calculated to obtain table 7, as follows:
TABLE 7
Figure BDA0003471756660000142
As is clear from Table 7, the flat crush strength, side crush strength and bending strength were the best in the case of using a sandwich panel having a panel thickness of 3mm, a paper tube wall thickness of 3mm and a hole diameter of 30mm, while determining the thickness of the sandwich panel.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The reinforced frameless paper tube sandwich board is characterized by comprising a bottom board, a face board and a core layer adhered between the bottom board and the face board, wherein the core layer is formed by parallel and/or linear arrangement of a plurality of round tube cells with the same height, and the outer walls of round tubes of adjacent round tube units are mutually bonded to form a porous core layer; the circular tube cell element is formed by one or more circular tube units which are adhered together, and the axis of each circular tube unit is perpendicular to the bottom plate and the panel.
2. The reinforced frameless paper tube sandwich panel according to claim 1, wherein the core layer is further provided with reinforcing ribs which penetrate through the same or different circular tube units on the same straight line.
3. The reinforced frameless paper tube sandwich panel of claim 1, wherein the first circular tube cell and the second adjacent circular tube cell are arranged in a staggered manner, and the circular tube unit of the first circular tube cell and the circular tube unit of the second adjacent circular tube cell have two adhesive points.
4. The reinforced frameless paper tube sandwich panel of claim 1, wherein the first circular tube cell and the second adjacent circular tube cell are arranged in parallel, and the single circular tube unit of the first circular tube cell and the circular tube unit of the second circular tube cell have a bonding point.
5. The reinforced frameless paper tube sandwich panel according to claim 1, wherein the height of the circular tube unit in the circular tube cell is 10-30 mm; the wall thickness of the circular tube unit is 2-5 mm; the aperture of the circular tube unit is 30-60 mm.
6. The reinforced frameless paper tube sandwich panel of claim 1, wherein the material of the face and/or base sheet comprises one or more of a metal sheet, a plastic sheet, a wood sheet, or a cardboard.
7. The reinforced frameless paper tube sandwich panel of claim 1, wherein the base and/or face sheets are bonded or coated with a water-resistant material.
8. The preparation method of the reinforced frameless paper tube sandwich panel according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1, cell bonding: preparing paper round tubes with proper specifications according to preset requirements, bonding the round tube units with adjacent round tube units to form a round tube cell structure, and sequentially arranging the round tube cell structures to form triangular or rectangular arrangement to obtain a core layer structure of the sandwich board;
s2, adhering and covering: and gluing the gluing surface of the surface plate to be laminated, and gluing and pressing the core layer and the surface plate by adopting a mechanical equipment push rod after gluing so as to firmly bond and obtain the reinforced frameless paper tube sandwich plate.
9. The method as claimed in claim 8, wherein the core layer structure of S1 is further provided with reinforcing ribs, the bonded core layer cell structures are perforated in a vertical direction, and the reinforcing ribs are embedded into the holes to form the core layer reinforced cell structures.
10. The reinforced frameless paper tube sandwich panel according to any one of claims 1 to 7, applied to paper-based furniture, preferably to furniture panels.
CN202210044940.5A 2022-01-14 2022-01-14 Reinforced frameless paper tube sandwich board Pending CN114368210A (en)

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Publication number Priority date Publication date Assignee Title
CN204566832U (en) * 2015-04-07 2015-08-19 广州韬普复合材料有限公司 A kind of multi-functional PP thermoplasticity pipe honeycomb composite plate
CN205044227U (en) * 2015-09-29 2016-02-24 广州韬普复合材料有限公司 PP pipe honeycomb acoustic celotex board
CN205167738U (en) * 2015-09-29 2016-04-20 广州韬普复合材料有限公司 PP pipe honeycomb PLASTIC LAMINATED
CN207875060U (en) * 2017-12-18 2018-09-18 江苏上善纸业有限公司 Corrugated paper
CN209955470U (en) * 2019-05-24 2020-01-17 景德镇燕建蜂窝纸制品有限公司 High-strength hollow paper honeycomb structure
CN211942349U (en) * 2020-01-03 2020-11-17 国家能源投资集团有限责任公司 Sandwich structure composite board
CN213733770U (en) * 2020-09-25 2021-07-20 南昌航空大学 Sound absorption and insulation integrated honeycomb plate with built-in expansion chamber
CN113445667A (en) * 2021-08-06 2021-09-28 吉林大学 Energy-absorbing protection sandwich panel of imitative bamboo gradient variation structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204566832U (en) * 2015-04-07 2015-08-19 广州韬普复合材料有限公司 A kind of multi-functional PP thermoplasticity pipe honeycomb composite plate
CN205044227U (en) * 2015-09-29 2016-02-24 广州韬普复合材料有限公司 PP pipe honeycomb acoustic celotex board
CN205167738U (en) * 2015-09-29 2016-04-20 广州韬普复合材料有限公司 PP pipe honeycomb PLASTIC LAMINATED
CN207875060U (en) * 2017-12-18 2018-09-18 江苏上善纸业有限公司 Corrugated paper
CN209955470U (en) * 2019-05-24 2020-01-17 景德镇燕建蜂窝纸制品有限公司 High-strength hollow paper honeycomb structure
CN211942349U (en) * 2020-01-03 2020-11-17 国家能源投资集团有限责任公司 Sandwich structure composite board
CN213733770U (en) * 2020-09-25 2021-07-20 南昌航空大学 Sound absorption and insulation integrated honeycomb plate with built-in expansion chamber
CN113445667A (en) * 2021-08-06 2021-09-28 吉林大学 Energy-absorbing protection sandwich panel of imitative bamboo gradient variation structure

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