Composite packaging board and packaging box

Abstract

The embodiment of the utility model discloses a composite packaging board and a packaging box. The composite packaging board comprises at least one first glass fiber reinforcing layer, a heat preservation and weight reduction layer and at least one second glass fiber reinforcing layer which are arranged in a stacked mode; the first glass fiber reinforced layer, the heat-preservation weight-reduction layer and the second glass fiber reinforced layer are connected through a resin vacuum infusion process, the heat-preservation weight-reduction layer is bonded with the first glass fiber reinforced layer and the second glass fiber reinforced layer through resin, and the resin permeates into the heat-preservation weight-reduction layer. The packaging box is made of the composite packaging board. Compared with an iron or wood product with the same thickness, the iron or wood product has the advantages that the iron or wood product is light, the hardness is higher than that of a wood product, the bearing performance is good, and the cost performance is high.

Description

Technical Field

[0001] This application relates to the field of packaging board technology, and in particular to a composite packaging board and a packaging box. Background Technology

[0002] With the diversification of products, the market demands increasingly diverse packaging boxes. From small mobile phone boxes to large home appliance packaging, from ordinary express delivery packaging to special equipment packaging boxes, different products have different requirements for packaging boxes. Some require impact resistance and drop resistance, some require light weight, some require low cost, and some require attractive appearance.

[0003] Currently, common packaging materials include cardboard boxes, wooden crates, metal crates, and plastic crates. Among them, cardboard boxes are low in cost and light in weight, but have poor rigidity and cannot support heavy items; wooden crates have high rigidity, but poor cushioning performance, are not shock-resistant, and have poor sealing, and their cost is much higher than that of cardboard boxes; metal crates have good rigidity, but their shock resistance is also poor and they are too heavy to be suitable for items that need to be frequently moved, and their high cost limits their widespread adoption; plastic crates have good thermal insulation, good sealing, and are lightweight, but they are not impact-resistant and their rigidity is lower than that of wooden or metal crates.

[0004] Based on the above technical solutions, there is an urgent need for a composite packaging board that is lightweight, has high rigidity, good load-bearing capacity, and high cost performance. Summary of the Invention

[0005] To address at least one of the problems mentioned in the background art, embodiments of this application provide a composite packaging board and a packaging box, which have the advantages of being lighter than iron or wood products of the same thickness, having higher hardness than wood products, better load-bearing capacity, and higher cost performance.

[0006] To achieve the above objectives, the first aspect of this application provides a composite packaging board, comprising at least one first glass fiber reinforcing layer, a thermal insulation and weight reduction layer, and at least one second glass fiber reinforcing layer stacked together. The first glass fiber reinforcing layer, the thermal insulation and weight reduction layer, and the second glass fiber reinforcing layer are connected by a resin vacuum infusion process. The resin bonds the thermal insulation and weight reduction layer to the first glass fiber reinforcing layer and the second glass fiber reinforcing layer, and the resin penetrates into the thermal insulation and weight reduction layer.

[0007] In one feasible implementation, a protective layer is provided on the outer side of the first glass fiber reinforcement layer and / or the second glass fiber reinforcement layer, which are located away from the thermal insulation and weight reduction layer. The protective layer includes a leather adhesive layer, a sticker layer, or a carbon fiber layer.

[0008] In one feasible implementation, the thermal insulation and weight reduction layer comprises polyurethane foam or PVC foam.

[0009] In one feasible implementation, the density of the thermal insulation and weight reduction layer ranges from 30 kg / m³ to 100 kg / m³.

[0010] In one feasible implementation, the thickness of the thermal insulation and weight reduction layer ranges from 2mm to 40mm.

[0011] In one feasible implementation, the first glass fiber reinforcing layer comprises one of chopped glass fibers and composite glass fibers;

[0012] The second glass fiber reinforcement layer includes one of chopped glass fibers and composite glass fibers.

[0013] In one feasible implementation, the composite glass fiber comprises a composite of chopped glass fiber mat and glass cloth.

[0014] In one possible implementation, the resin comprises epoxy resin or unsaturated flame-retardant resin.

[0015] A second aspect of this application provides a packaging box made of the aforementioned composite packaging board.

[0016] In one feasible implementation, the joints of the packaging box panels are filled with sealant; the packaging box has interlocking openings, and the panels at the openings are provided with mutually cooperating grooves and protrusions, with a silicone sealing layer of composite fiber filaments cured in the grooves.

[0017] This application provides a composite packaging board and a packaging box. The composite packaging board includes a first glass fiber reinforcing layer, a thermal insulation and weight reduction layer, and a second glass fiber reinforcing layer, and is prepared by a resin vacuum infusion process. The packaging box is made from the above-mentioned composite packaging board. The first and second glass fiber reinforcing layers have good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. The thermal insulation and weight reduction layer can reduce the weight of the product, lower manufacturing costs, and improve thermal insulation performance. Using the resin vacuum infusion process, the product's strength and stiffness are improved, the product quality is stable, the product porosity is low, the product fiber content is high, the interlayer strength is improved, the product's fatigue resistance is enhanced, and the overall weight is reduced.

[0018] The composite packaging boards and boxes provided in this application have the advantages of being lighter than iron or wood products of the same thickness, having higher hardness than wood products, better load-bearing capacity, better insulation, stronger heat resistance, better corrosion resistance, and higher cost performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional layered schematic diagram of a composite packaging sheet provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of another cross-sectional layer of the composite packaging board provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of another cross-sectional layer of the composite packaging board provided in the embodiments of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. It is worth noting that the embodiments described in the accompanying drawings are only some embodiments of this application, and not all embodiments. That is, the embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0024] The following will combine Figures 1-3 The composite packaging sheet provided in the embodiments of this application will be described.

[0025] This application provides a composite packaging board, including at least one first glass fiber reinforcing layer, a thermal insulation and weight reduction layer, and at least one second glass fiber reinforcing layer stacked together. The first glass fiber reinforcing layer, the thermal insulation and weight reduction layer, and the second glass fiber reinforcing layer are connected by a resin vacuum infusion process. The resin bonds the thermal insulation and weight reduction layer to the first glass fiber reinforcing layer and the second glass fiber reinforcing layer, and the resin penetrates into the thermal insulation and weight reduction layer.

[0026] The first and second glass fiber reinforcing layers are made of glass fiber, which provides good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. In practice, one or more layers of the first and second glass fiber reinforcing layers can be selected according to application requirements, for example... Figure 1 The single-layer glass fiber reinforced layer shown, or Figure 2 and Figure 3 The double-layer glass fiber reinforcement layer is shown in the figure.

[0027] The thermal insulation and weight reduction layer can be made of foam material, which can reduce the weight of the board, reduce the production cost, and improve the thermal insulation performance.

[0028] The resin vacuum infusion process is used to prepare the molding, which improves the strength and rigidity of the board, stabilizes the product quality, reduces the porosity, increases the fiber content, improves the interlayer strength, enhances the fatigue resistance, and reduces the overall weight. The flame-retardant resin also provides fire resistance.

[0029] Specifically, the resin vacuum infusion process may include the following production steps:

[0030] Polish and grind the flat mold until it is smooth and flat, then apply wax and release agent to the surface;

[0031] A second glass fiber reinforcement layer, with a number of layers selected as needed, is laid on the surface of the flat mold.

[0032] An insulation and weight reduction layer is placed on the surface of the topmost second glass fiber reinforced layer;

[0033] A first glass fiber reinforcement layer, with the number of layers selected as needed, is laid on the surface of the thermal insulation and weight reduction layer.

[0034] A vacuum bag is covered on the surface of the topmost first glass fiber reinforcing layer, and then connected to the equipment for the resin vacuum infusion process.

[0035] The resin is mixed, for example, by means of 1 part epoxy resin, 0.5 parts curing agent and 0.1 parts accelerator, and mixed evenly as needed;

[0036] The equipment used in the resin vacuum infusion process introduces the mixed resin into a vacuum bag for curing.

[0037] Remove the vacuum bag and demold;

[0038] After demolding, place the product on a flat plate for at least 12 hours until fully cured.

[0039] Thus, the composite packaging board with the molded surface is prepared.

[0040] When the surface of the composite packaging board needs to be coated with a protective layer as described below, the following production steps may be included:

[0041] Cut the fully cured product to the set size.

[0042] After cutting, the product is sealed with film or leather.

[0043] Press the product after it has been coated or sealed with a leather edge for 12 hours.

[0044] Thus, a composite packaging board with a protective layer on its shaped surface has been prepared.

[0045] It is understandable that when the protective layer is a carbon fiber layer, it can be integrally formed by the resin vacuum infusion process. That is, before the step of laying the second glass fiber reinforcing layer on the flat mold, the carbon fiber layer can be laid as needed, and before the step of covering the surface of the topmost first glass fiber reinforcing layer with a vacuum bag, the carbon fiber layer can be laid as needed, and other steps remain unchanged.

[0046] The composite packaging board provided in this application has the advantages of being lighter than iron or wood boards of the same thickness, having higher hardness than wood boards, better load-bearing capacity, better insulation, stronger heat resistance, better corrosion resistance, fireproof, waterproof, heat insulation, and higher cost performance.

[0047] In one feasible implementation, a protective layer is provided on the outside of the first glass fiber reinforcement layer and / or the second glass fiber reinforcement layer located away from the thermal insulation and weight reduction layer. The protective layer includes a leather adhesive layer, a sticker layer, or a carbon fiber layer.

[0048] A protective layer can be provided outside the outermost first glass fiber reinforcing layer, or outside the outermost second glass fiber reinforcing layer, or both of the above protective layers can be provided simultaneously.

[0049] Leather bonding layers, sticker layers, and carbon fiber layers can also be used as decorative layers. Leather bonding layers offer a softer and more comfortable feel. Sticker layers are more affordable. Carbon fiber layers are more premium and improve surface heat resistance, abrasion resistance, thermal conductivity, and corrosion resistance.

[0050] Entrusting a third party to handle such Figure 3 The mechanical properties and corrosion resistance of the sample board with the carbon fiber protective layer shown are tested, as shown in Table 1. It can be seen that the flexural strength of the sample board reaches 58.33 MPa, the Shore hardness reaches 80 HD, and after 72 hours of neutral salt spray testing, there was no obvious corrosion on the surface, but some white residue was formed, with the residue area less than 5%. This indicates that the sample board has a higher hardness than conventional wood-based panels and possesses higher flexural strength and corrosion resistance.

[0051]

[0052] In one feasible implementation, the thermal insulation and weight reduction layer comprises polyurethane foam or PVC foam.

[0053] Both are used to reduce weight and have both heat insulation and weight reduction effects. Among them, PVC foam is less expensive than polyurethane foam.

[0054] In one feasible implementation, the density of the thermal insulation and weight reduction layer ranges from 30 kg / m³ to 100 kg / m³.

[0055] This provides a certain degree of heat insulation and weight reduction, and the foam's pores allow resin to penetrate, improving adhesion and overall strength.

[0056] In one feasible implementation, the thickness of the thermal insulation and weight reduction layer ranges from 2 mm to 40 mm.

[0057] In this way, the prepared composite packaging board is not only lightweight, but also has a certain strength to suit the application scenario.

[0058] In one feasible implementation, the first glass fiber reinforcing layer comprises one of chopped glass fibers and composite glass fibers; the second glass fiber reinforcing layer comprises one of chopped glass fibers and composite glass fibers.

[0059] This allows for flexible selection of glass fiber based on needs and cost.

[0060] In one feasible implementation, the composite glass fiber comprises a composite of chopped glass fiber mat and glass cloth.

[0061] The specifications of the chopped glass fiber are 200-450 g / m. 2 Composite glass fiber comprises a composite of chopped strand mat and glass cloth; for example, the composite glass fiber may be 200 g / m². 2 Specifications of 600g / m² chopped strand mat composite 2 Standard glass cloth, 300g / m², is also available. 2 Specifications of 600g / m² chopped strand mat composite 2 Standard glass cloth.

[0062] In one feasible implementation, the resin includes epoxy resin or unsaturated flame-retardant resin.

[0063] In this way, using resins with higher flame retardant ratings can give the boards a fire-retardant effect.

[0064] The packaging box provided in the embodiments of this application will be described below.

[0065] This application provides a packaging box made of the aforementioned composite packaging board.

[0066] In this way, the prepared packaging boxes can also have the advantages of being lighter than iron or wooden packaging boxes of the same thickness, having higher hardness than wooden packaging boxes, better load-bearing capacity, better insulation, stronger heat resistance, better corrosion resistance, fireproof, waterproof, heat preservation, and higher cost performance.

[0067] In one feasible implementation, the joints of the packaging box panels are filled with sealant; the packaging box has interlocking openings, and the panels at the openings are provided with mutually cooperating grooves and protrusions, with a silicone sealing layer of composite fiber filaments cured in the grooves.

[0068] For example, when splicing the panels, sealant is first applied to the external gaps. After the sealant is applied, the metal strip is fixed. After the box is formed, sealant is applied to the internal gaps. After curing, the box opening is sealed.

[0069] When sealing the box opening, apply silicone evenly to the groove of the box opening. After application, insert a certain number of fiber filaments (glass fiber or metal fiber can be selected) to prevent the silicone from breaking. Apply silicone release agent to the convex side, apply evenly, and then press the convex side onto the concave side where the silicone was applied to compact it. Wait for it to cure.

[0070] This allows for effective sealing of the packaging box, providing high water resistance.

[0071] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" in the description of this application should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0072] The terms “upper,” “lower,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0073] The term "multiple" means two or more, unless otherwise specified precisely.

[0074] The terms “first,” “second,” “third,” “fourth,” etc., (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can include implementations in sequences other than those illustrated or described herein.

[0075] The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A composite packaging board, characterized in that, It includes at least one first glass fiber reinforcing layer, a thermal insulation and weight reduction layer and at least one second glass fiber reinforcing layer stacked together. The first glass fiber reinforcing layer, the thermal insulation and weight reduction layer and the second glass fiber reinforcing layer are connected by a resin vacuum infusion process. The resin bonds the thermal insulation and weight reduction layer to the first glass fiber reinforcing layer and the second glass fiber reinforcing layer, and the resin penetrates into the thermal insulation and weight reduction layer. The thermal insulation and weight reduction layer comprises polyurethane foam or PVC foam; the density range of the thermal insulation and weight reduction layer is 30 kg / m³ - 100 kg / m³. The first glass fiber reinforcing layer includes one of chopped glass fibers and composite glass fibers; The second glass fiber reinforcement layer includes one of chopped glass fibers and composite glass fibers.

2. The composite packaging board according to claim 1, characterized in that, A protective layer is provided on the outside of the first glass fiber reinforcement layer and / or the second glass fiber reinforcement layer, which are located away from the thermal insulation and weight reduction layer. The protective layer includes a leather adhesive layer, a sticker layer or a carbon fiber layer.

3. The composite packaging board according to claim 1 or 2, characterized in that, The thickness of the thermal insulation and weight reduction layer ranges from 2mm to 40mm.

4. The composite packaging board according to claim 1 or 2, characterized in that, The composite glass fiber includes chopped strand mat and glass cloth composite glass fiber.

5. The composite packaging board according to claim 1 or 2, characterized in that, The resin includes epoxy resin or unsaturated flame-retardant resin.

6. A packaging box, characterized in that, Made from the composite packaging board as described in any one of claims 1-5.

7. The packaging box according to claim 6, characterized in that, The joints of the packaging box panels are filled with sealant; the packaging box has interlocking openings, and the panels at the openings are provided with mutually cooperating grooves and protrusions, with a silicone sealing layer of composite fiber filaments cured in the grooves.

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