Paper-plastic container and preparation method thereof

Abstract

The invention provides a paper-plastic container and a preparation method thereof. The paper-plastic container provided by the embodiment of the invention comprises the following components in percentage by mass: 55-65% of sugarcane fiber and 35-45% of wood fiber. According to the paper-plastic container disclosed by the embodiment of the invention, the raw materials are renewable, and the paper-plastic container has good degradability, does not pollute the environment and has relatively high mechanical strength.

Description

Technical Field

[0001] The present application relates to the field of food containers, and in particular to a paper-plastic container and a preparation method thereof. Background Art

[0002] As people's living standards improve, portable drinks, solid foods, etc. are used more and more frequently, and these drinks or foods need to be placed in containers. Most of these containers are disposable products, and the drinks are directly discarded after use. At present, most of these containers are made of metal (such as aluminum alloy) or plastic. The use of metal will greatly increase the cost of the container, and the use of plastic will generate a large amount of plastic waste, causing environmental pollution. Summary of the invention

[0003] The embodiment of the present application provides a paper-plastic container, the raw materials of which are renewable, the paper-plastic container has good degradability, will not pollute the environment, and has high mechanical strength.

[0004] In a first aspect, an embodiment of the present application provides a paper-plastic container, which comprises, by mass fraction, 55% to 65% of sugarcane fiber and 35% to 45% of wood fiber.

[0005] Furthermore, the paper-plastic container comprises:

[0006] A paper-plastic cup body, wherein the paper-plastic cup body has a receiving cavity with one end open, and the receiving cavity is used to receive a target object;

[0007] A paper plastic outer edge, the paper plastic outer edge is arranged around the outer circumference of the opening of the paper plastic cup body, and the paper plastic outer edge is bent and connected to the paper plastic cup body; and

[0008] A paper plastic boss, the paper plastic boss is arranged on a side of the paper plastic outer edge away from the paper plastic cup body and surrounds the outer periphery of the paper plastic outer edge;

[0009] The paper plastic cup body, the paper plastic outer edge and the paper plastic boss are an integrated structure, the thickness of the paper plastic boss is greater than the thickness of the paper plastic cup body, and the thickness of the paper plastic cup body is greater than the thickness of the paper plastic outer edge.

[0010] Furthermore, when the paper-plastic container holds a liquid at 100° C., it rotates at a speed of 5000 rad / min to 8000 rad / min and can withstand a rotation of 60 s to 180 s.

[0011] Furthermore, the paper-plastic container is manufactured by using a concave mold to absorb slurry, and undergoing shaping and hot pressing.

[0012] In a second aspect, an embodiment of the present application provides a method for preparing a paper-plastic container, which comprises:

[0013] Provide a pulp absorption mold and a paper-plastic pulp, wherein the paper-plastic pulp comprises sugarcane fiber and wood fiber, and in the paper-plastic pulp, the mass ratio of the sugarcane fiber to the wood fiber is in the range of 55:45 to 65:35;

[0014] The slurry absorption mold is placed in the paper-plastic slurry to absorb the slurry, and after shaping, a paper-plastic blank is obtained; and

[0015] The paper-plastic blank is subjected to hot pressing to obtain the paper-plastic container.

[0016] Furthermore, the slurry suction mold is a concave mold, and the slurry suction mold has a concave mold cavity.

[0017] Further, the slurry absorption mold includes a slurry absorption mold body, a first mesh surface and a second mesh surface; the slurry absorption mold body has the concave mold cavity, the first mesh surface and the second mesh surface are sequentially stacked on the surface of the side wall that encloses the concave mold cavity, the slurry absorption mold body has a plurality of first through holes located in the concave mold cavity and arranged at intervals, the first mesh surface has a plurality of first mesh holes arranged at intervals, the second mesh surface has a plurality of second mesh holes arranged at intervals, the aperture of the first through hole is larger than the aperture of the first mesh hole, and the aperture of the first mesh hole is larger than the aperture of the second mesh hole.

[0018] Furthermore, the aperture of the first through hole ranges from 1.8 mm to 2.5 mm, and the distance between two adjacent first through holes ranges from 2 mm to 4 mm; the mesh number of the first mesh ranges from 30 mesh to 50 mesh, and the mesh number of the second mesh ranges from 70 mesh to 90 mesh.

[0019] Furthermore, the paper-plastic blank is hot-pressed to obtain the paper-plastic container, comprising:

[0020] Providing a hot pressing upper mold and a hot pressing lower mold, wherein the hot pressing upper mold and the hot pressing lower mold enclose a hot pressing mold cavity;

[0021] The paper-plastic blank is transferred to a hot pressing mold cavity for hot pressing molding to obtain the paper-plastic container, wherein the temperature of the hot pressing upper mold ranges from 120° C. to 140° C., the temperature of the hot pressing lower mold ranges from 130° C. to 150° C., and the hot pressing pressure ranges from 0.5 MPa to 0.8 MPa.

[0022] Furthermore, the hot pressing lower mold includes a lower mold body and a third mesh surface, the lower mold body is a convex mold, the lower mold body includes a convex mold part, the convex mold part has a plurality of second through holes arranged at intervals, the third mesh surface is arranged on the surface of the convex mold part and covers the plurality of second through holes, the aperture of the second through holes ranges from 1.8 mm to 2.5 mm, and the spacing between two adjacent second through holes ranges from 8 mm to 15 mm.

[0023] The paper-plastic container of the embodiment of the present application comprises, by mass fraction, 55% to 65% of sugarcane fiber and 35% to 45% of wood fiber. The paper-plastic container of the embodiment of the present application has high mechanical strength, high rigidity and stiffness by designing the compounding and proportion of sugarcane fiber and wood fiber; in addition, the thickness of the paper-plastic container is more uniform, the surface is smoother, and it is less likely to have layout defects. Furthermore, the paper-plastic container of the embodiment of the present application is made of renewable and degradable materials, has good degradability, and will not pollute the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a paper-plastic container from one perspective of an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram of a paper-plastic container from another perspective of an embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the top view of the paper-plastic container according to one embodiment of the present application.

[0028] Figure 4 The paper-plastic container of one embodiment of the present application is Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0029] Figure 5 This is another embodiment of the paper-plastic container of the present application. Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0030] Figure 6 The paper-plastic container of another embodiment of the present application is Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0031] Figure 7 It is a schematic cross-sectional structural diagram of a beverage capsule according to an embodiment of the present application.

[0032] Figure 8 It is a schematic flow chart of a method for preparing a paper-plastic container according to an embodiment of the present application.

[0033] Fig. 9 It is a schematic structural diagram of a slurry suction mold according to an embodiment of the present application.

[0034] Fig.10 It is a schematic diagram of a partial explosion structure of a slurry suction mold according to an embodiment of the present application.

[0035] Fig.11 It is a structural schematic diagram of a hot pressing mold according to an embodiment of the present application.

[0036] Fig.12 It is a schematic diagram of the explosion structure of a hot pressing mold according to an embodiment of the present application.

[0037] Fig.13 It is a schematic diagram of a partial explosion structure of a hot pressing mold from another perspective of an embodiment of the present application.

[0038] Fig.14 This is a photo of the paper-plastic container of Example 1 of the present application after being subjected to a bending test and folded 8 times.

[0039] Fig.15 This is a photo of the paper-plastic container of Example 2 of the present application after being subjected to a bending test and folded 8 times.

[0040] Fig.16 This is a photo of the paper-plastic container of Example 3 of the present application after being subjected to a bending test and folded 8 times.

[0041] Fig.17 This is a photo of the paper-plastic container of comparative example 1 of the present application after being subjected to a bending test and folded once.

[0042] Fig.18 This is a photo of the paper-plastic container of comparative example 2 of the present application after being folded once after a bending test.

[0043] Fig.19 This is a photo of the paper-plastic container of comparative example 3 of the present application after being folded once after a bending test.

[0044] Fig. 20 These are photos of the paper-plastic container of Example 1 of the present application after being tested on a machine, wherein (a) is a front photo and (b) is a back photo.

[0045] Fig.21 This is a photo of the paper-plastic container of Example 2 of the present application after being tested on a machine.

[0046] Fig. 22 This is a photo of the paper-plastic container of Example 3 of the present application after being tested on a machine.

[0047] Fig.23 This is a photo of the paper-plastic container of comparative example 1 of the present application after being tested on a machine.

[0048] Fig.24 This is a photo of the paper-plastic container of comparative example 2 of the present application after being tested on a machine.

[0049] Fig.25 This is a photo of the paper-plastic container of comparative example 3 of the present application after being tested on a machine.

[0050] Description of reference numerals:

[0051] 100-paper plastic container, 11-paper plastic cup body, 111-cup body, 112-outward expansion part, 12-paper plastic outer edge, 13-paper plastic boss, 14-accommodating cavity, 141-first sub-cavity, 142-second sub-cavity, 15-sacrificial part, 20-barrier layer, 200-beverage capsule, 210-sealing cover, 300-slurry absorption mold, 310-slurry absorption mold body, 311-first through hole, 312-concave mold cavity, 320-first mesh surface, 321-first mesh hole, 330-second mesh surface, 331-second mesh hole, 400-hot pressing mold, 410-hot pressing upper mold, 420-hot pressing lower mold, 421-lower mold body, 4212-second through hole, 422-third mesh surface, 4221-third mesh hole. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0054] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0055] It should be noted that, for the convenience of explanation, in the embodiments of the present application, the same figure marks represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0056] As people's living standards improve, portable drinks, solid foods, etc. are used more and more frequently, and these drinks or foods need to be placed in containers. Most of these containers are disposable products, and the drinks are directly discarded after use. At present, most of these containers are made of metal (such as aluminum alloy) or plastic. The use of metal will greatly increase the cost of the container, and the use of plastic will generate a large amount of plastic waste, causing environmental pollution.

[0057] See also Figure 1 The embodiment of the present application provides a paper-plastic container 100, which includes, by mass fraction, 55% to 65% of sugarcane fiber and 35% to 45% of wood fiber.

[0058] It should be noted that the "paper plastic" in this application refers to a product prepared by a pulp molding process using degradable plant fibers such as wood, bamboo, bagasse, reeds, straw, hemp stalks, and crop stalks.

[0059] In the embodiments of the present application, when a numerical value range from a to b is involved, unless otherwise specified, it means that the numerical value can be any numerical value between a and b, including the endpoint numerical value a and the endpoint numerical value b.

[0060] Optionally, the paper-plastic container 100 of the embodiment of the present application can be prepared using degradable materials such as wood, bamboo, bagasse, reed, straw, hemp stalks, and crop straw.

[0061] Optionally, the target object may be, but is not limited to, solid food powders such as coffee powder, milk tea powder, tea powder, juice powder, and protein powder.

[0062] It should be noted that the paper-plastic container 100 of the embodiment of the present application can be used to contain solid food powders such as coffee powder, milk tea powder, tea powder, juice powder, protein powder, etc.

[0063] Optionally, the wood fiber can be at least one of hardwood fibers. Optionally, the hardwood fiber can be but is not limited to at least one of oak fiber, mahogany fiber, birch fiber, red oak fiber, hard maple fiber, alder fiber, beech fiber, boxwood fiber, etc.

[0064] Specifically, the mass fraction of the sugarcane fiber in the paper plastic container 100 may be, but is not limited to, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, etc. If the content of sugarcane fiber in the paper plastic container 100 is too little, the content of wood pulp fiber is too much. When the paper plastic container 100 is of unequal thickness, the thicker the thin edge (i.e., the thinner position) on the paper plastic container 100 is, the greater the hot pressing pressure is required. If the hot pressing pressure is too high, the thinner position on the paper plastic container 100 is easily blackened and broken; if the content of sugarcane fiber in the paper plastic container 100 is too much, the content of wood pulp fiber is too little, the prepared paper plastic container 100 is brittle, and the thinner position on the paper plastic container 100 is prone to brittle fracture. In addition, the surface of the paper plastic container 100 is relatively rough, which affects the appearance and feel of the paper plastic container 100.

[0065] Specifically, the mass fraction of wood fiber in the paper plastic container 100 may be, but is not limited to, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, etc. If the content of wood pulp fiber is too little, the content of sugar cane fiber in the paper plastic container 100 is too much, and the prepared paper plastic container 100 is brittle, and the thinner position on the paper plastic container 100 is prone to brittle fracture. In addition, the surface of the paper plastic container 100 is relatively rough, which affects the appearance and feel of the paper plastic container 100; if the content of wood pulp fiber is too much, the content of sugar cane fiber in the paper plastic container 100 is too little. When the paper plastic container 100 is of unequal thickness, the thicker the thin edge (i.e., the thinner position) on the paper plastic container 100, the greater the hot pressing pressure is required. If the hot pressing pressure is too large, the thinner position on the paper plastic container 100 will be easily blackened and broken.

[0066] During the molding process of wood pulp fibers, the distribution of fibers in the mold is not uniform, which affects the molding accuracy and surface quality of the product. For example, during vacuum filtration molding, wood pulp fibers may gather or entangle under the action of suction, resulting in uneven product thickness or local defects. And the fibers will stick to the mold, affecting mass production. Wood pulp fibers are relatively long and tough, which makes the paper-plastic products made from them more flexible and lack sufficient rigidity and stiffness. For some paper-plastic products that need to maintain a specific shape or have high support, such as some packaging structural parts or containers that need to be placed upright, the requirements for shape stability may not be met. Sugarcane fiber belongs to medium-short fibers, and its length and toughness are between some short fiber and long fiber raw materials. It has the advantages of moderate strength and moderate toughness. It is a relatively suitable raw material for molded products and can better maintain the shape and structural stability of the products. The characteristics of sugarcane bagasse fibers can be naturally entangled together to form a tight mesh structure, which makes the products have good integrity, stiffness and hardness, and are not easy to loosen, and can meet various needs in daily use, such as carrying food and bearing a certain amount of pressure.

[0067] The paper-plastic container 100 of the embodiment of the present application includes, by mass fraction, 55% to 65% of sugarcane fiber and 35% to 45% of wood fiber. The paper-plastic container 100 of the embodiment of the present application has a higher mechanical strength, higher rigidity and stiffness by designing the compounding and proportion of sugarcane fiber and wood fiber; in addition, the thickness of the paper-plastic container 100 is more uniform, the surface is smoother, and it is less likely to have layout defects. Furthermore, the paper-plastic container 100 of the embodiment of the present application is made of renewable and degradable materials, has good degradability, and will not pollute the environment.

[0068] See also Figures 1 to 4 In some embodiments, the paper plastic container 100 includes a paper plastic cup body 11, a paper plastic outer edge 12, and a paper plastic boss 13. The paper plastic cup body 11 has a receiving cavity 14 with an opening at one end, and the receiving cavity 14 is used to accommodate a target object; the paper plastic outer edge 12 is arranged around the outer periphery of the opening of the paper plastic cup body 11, and the paper plastic outer edge 12 is bent and connected to the paper plastic cup body 11; the paper plastic boss 13 is arranged on the side of the paper plastic outer edge 12 away from the paper plastic cup body 11 and is arranged around the outer periphery of the paper plastic outer edge 12; wherein the paper plastic cup body 11, the paper plastic outer edge 12, and the paper plastic boss 13 are an integrated structure, the thickness of the paper plastic boss 13 is greater than the thickness of the paper plastic cup body 11, and the thickness of the paper plastic cup body 11 is greater than the thickness of the paper plastic outer edge 12.

[0069] It should be noted that the paper plastic cup body 11, the paper plastic outer edge 12, and the paper plastic boss 13 can be integrally formed by a pulp molding process. The paper plastic cup body 11, the paper plastic outer edge 12, and the paper plastic boss 13 are different parts of the same part. There is no splicing, bonding, welding or other bonding interface between the paper plastic cup body 11, the paper plastic outer edge 12, and the paper plastic boss 13.

[0070] Optionally, the paper plastic cup body 11 may be, but is not limited to, at least one of a hemispherical structure, a hemispherical structure, a cylindrical structure with one end closed and the other end open, etc. The shape of the paper plastic cup body 11 may be regular or irregular, which is not limited in the present application.

[0071] It can be understood that the paper plastic outer edge 12 is an annular structure, and the paper plastic boss 13 is an annular structure. The paper plastic cup body 11, the paper plastic outer edge 12 and the paper plastic boss 13 are connected in sequence.

[0072] It should be noted that when the paper-plastic container 100 of the present application is used to contain food powders such as coffee powder, tea powder, and beverage powder to make beverage capsules, the beverage capsules can be used in conjunction with beverage equipment such as coffee machines and tea extraction machines.

[0073] The beverage device comprises a body and a cover body which are rotatably connected. The body has a receiving groove for receiving beverage capsules, and the cover body is used to close the receiving groove. When the beverage capsule is set in the beverage device, the paper plastic cup body 11 of the paper plastic container 100 is received in the receiving groove of the beverage device, the paper plastic outer edge 12 fits the opening of the receiving groove, and the paper plastic boss 13 protrudes out of the receiving groove. When the cover body is closed, the body and the cover body cooperate to clamp the paper plastic outer edge 12, thereby fixing the beverage capsule, and the paper plastic boss 13 plays a limiting role to prevent the paper plastic capsule from falling into the receiving groove.

[0074] The paper plastic container 100 of the embodiment of the present application comprises a paper plastic cup body 11, a paper plastic outer edge 12 and a paper plastic boss 13. The paper plastic cup body 11, the paper plastic outer edge 12 and the paper plastic boss 13 are an integrated structure, the thickness of the paper plastic boss 13 is greater than the thickness of the paper plastic cup body 11, and the thickness of the paper plastic cup body 11 is greater than the thickness of the paper plastic outer edge 12. The paper plastic cup body 11, the paper plastic outer edge 12, and the paper plastic boss 13 of the paper plastic container 100 of the present application are an integrated structure and can be integrally formed by pulp molding. Compared with the solution of forming them separately and then pasting them together, the preparation process of the paper plastic container 100 can be greatly simplified, the preparation cost of the paper plastic container 100 can be reduced, and there are no traces of bonding, so that the paper plastic container 100 has a better appearance effect; in addition, the thickness of the paper plastic boss 13 of the present application is greater than the thickness of the paper plastic cup body 11, and the thickness of the paper plastic cup body 11 is greater than the thickness of the paper plastic outer edge 12. By making the paper plastic cup body 11, the paper plastic outer edge 12 and the paper plastic boss 13 have different thicknesses, the paper plastic container 100 can be made more beautiful as a whole and have a better appearance effect. Furthermore, the thickness of the paper-plastic cup body 11 is greater than the thickness of the paper-plastic outer edge 12. The larger thickness of the paper-plastic cup body 11 can provide better support for the target object, so that the paper-plastic container 100 has better mechanical strength as a whole. The smaller thickness of the paper-plastic outer edge 12 can not only reduce the material used in the paper-plastic container 100 and reduce costs, but also make the paper-plastic outer edge 12 have a better feel; the thickness of the paper-plastic boss 13 is greater than the thickness of the paper-plastic cup body 11, so that the paper-plastic boss 13 can strengthen the paper-plastic outer edge 12 and prevent the paper-plastic outer edge 12 from deforming. In addition, the thickness of the paper-plastic boss 13 is relatively thick. When the paper-plastic container 100 is used to contain food powders such as coffee powder and tea powder, and is used in conjunction with beverage equipment such as a coffee machine for extraction, the paper-plastic boss 13 can play a limiting role, and better limit the paper-plastic container 100 on the beverage equipment.

[0075] Please see again Figure 4 In some embodiments, the ratio d1 / h1 of the diameter d1 of the opening of the paper-plastic cup body 11 to the thickness h1 of the paper-plastic cup body 11 is in the range of 70≤d1 / h1≤110.

[0076] Optionally, the ratio of the maximum diameter of the paper-plastic cup body 11 to the thickness of the paper-plastic cup body 11 is 70 to 110.

[0077] Specifically, the ratio d1 / h1 of the diameter d1 of the opening of the paper plastic cup body 11 to the thickness h1 of the paper plastic cup body 11 can be but is not limited to 70, 73, 75, 78, 80, 83, 85, 88, 90, 93, 95, 98, 100, 103, 105, 108, 110, etc.

[0078] In this embodiment, if the diameter d1 of the opening of the paper plastic cup body 11 and the thickness h1 of the paper plastic cup body 11 are too small, it is equivalent to using a larger thickness to prepare a smaller paper plastic container 100, which increases the production cost of the paper plastic container 100; if the diameter d1 of the opening of the paper plastic cup body 11 and the thickness h1 of the paper plastic cup body 11 are too large, it is equivalent to using a thinner thickness to prepare a paper plastic cup body 11 with a larger overall size, which will reduce the mechanical strength of the paper plastic container 100, easily deform, and reduce the service life of the paper plastic container 100.

[0079] In some embodiments, the range of the caliber d1 of the opening of the paper plastic cup body 11 is 48mm≤d1≤50mm. Specifically, the caliber d1 of the opening of the paper plastic cup body 11 can be, but is not limited to, 48mm, 48.3mm, 48.5mm, 48.8mm, 49mm, 49.3mm, 49.5mm, 49.8mm, 50mm, etc. The caliber d1 of the opening of the paper plastic cup body 11 is too small, which reduces the capacity of the paper plastic container 100. In addition, when the paper plastic container 100 is used to hold coffee and is applied to a coffee machine, it is easy for the paper plastic container 100 to shake when it is set on the coffee machine, which reduces the user experience. When the caliber d1 of the opening of the paper plastic cup body 11 is too large, the mechanical strength of the paper plastic container 100 is reduced, making the paper plastic container 100 easily deformed. In addition, when the paper plastic container 100 is used to hold coffee and is applied to a coffee machine, it is easy for the paper plastic container 100 to be unable to adapt to the coffee machine.

[0080] In some embodiments, the thickness h1 of the paper plastic cup body 11 is in the range of 0.5mm≤h1≤0.6mm. Specifically, the thickness h1 of the paper plastic cup body 11 can be, but is not limited to, 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm, 0.6mm, etc. If the thickness h1 of the paper plastic cup body 11 is too thin, the mechanical strength of the paper plastic container 100 is reduced, making the paper plastic container 100 easily deformed, and reducing the service life and user experience of the paper plastic container 100; if the thickness h1 of the paper plastic cup body 11 is too thick, the material used for the paper plastic container 100 is increased, and the cost of the paper plastic container 100 is increased. In addition, when the paper plastic container 100 is small, the capacity of the paper plastic container 100 is also reduced.

[0081] Please see again Figure 4 In some embodiments, the ratio h2 / h3 of the thickness h2 of the paper plastic outer edge 12 to the thickness h3 of the paper plastic boss 13 is in the range of 0.09≤h2 / h3≤0.15.

[0082] Specifically, the ratio h2 / h3 of the thickness h2 of the paper plastic outer edge 12 to the thickness h3 of the paper plastic boss 13 may be, but is not limited to, 0.09, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, 0.13, 0.135, 0.14, 0.145, 0.15, etc.

[0083] In this embodiment, if the ratio h2 / h3 of the thickness h2 of the paper plastic outer edge 12 to the thickness h3 of the paper plastic boss 13 is too small, the thickness of the paper plastic outer edge 12 is too thin, which reduces the mechanical strength of the paper plastic outer edge 12 and makes the paper plastic outer edge 12 easily deformed, or if the thickness of the paper plastic boss 13 is too thick, the preparation cost of the paper plastic container 100 is increased and the appearance of the paper plastic container 100 is affected. If the ratio h2 / h3 of the thickness h2 of the paper plastic outer edge 12 to the thickness h3 of the paper plastic boss 13 is too large, the thickness of the paper plastic outer edge 12 is too thick, which increases the cost of the paper plastic container 100, and the thickness difference between the paper plastic outer edge 12 and the paper plastic boss 13 is too small, which reduces the appearance of the paper plastic container 100; or if the thickness of the paper plastic boss 13 is too small, the mechanical strength of the paper plastic boss 13 is reduced, and the reinforcing effect of the paper plastic boss 13 on the paper plastic outer edge 12 is reduced.

[0084] In some embodiments, the thickness h2 of the paper plastic outer edge 12 is in the range of 0.2mm≤h2≤0.25mm. Specifically, the thickness h2 of the paper plastic outer edge 12 can be, but is not limited to, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, etc. If the thickness h2 of the paper plastic outer edge 12 is too thin, the mechanical strength of the paper plastic outer edge 12 is reduced, making the paper plastic outer edge 12 easily deformed; if the thickness h2 of the paper plastic outer edge 12 is too thick, the preparation cost of the paper plastic container 100 is increased, and the appearance of the paper plastic container 100 is affected; in addition, if the thickness h2 of the paper plastic outer edge 12 is too thick, when the paper plastic container 100 is used with beverage equipment such as a coffee machine, it is not conducive to the paper plastic container 100 to cooperate with the beverage equipment.

[0085] In some embodiments, the thickness h3 of the paper plastic boss 13 is in the range of 1.8 mm ≤ h3 ≤ 2.2 mm. Specifically, the thickness h3 of the paper plastic boss 13 may be, but is not limited to, 1.8 mm, 1.85 mm, 1.9 mm, 1.95 mm, 2.0 mm, 2.05 mm, 2.1 mm, 2.15 mm, 2.2 mm, etc. If the thickness h3 of the paper plastic boss 13 is too thin, the mechanical strength of the paper plastic boss 13 is reduced, and the reinforcing effect of the paper plastic boss 13 on the paper plastic outer edge 12 is reduced. In addition, when the paper plastic container 100 is used in conjunction with beverage equipment such as a coffee machine, the snap-fitting effect of the paper plastic boss 13 is reduced; if the thickness h3 of the paper plastic boss 13 is too thick, the preparation cost of the paper plastic container 100 is increased, and the appearance of the paper plastic container 100 is affected; in addition, if the thickness h3 of the paper plastic boss 13 is too thick, when the paper plastic container 100 is used in conjunction with beverage equipment such as a coffee machine, the paper plastic boss 13 is easy to hit the beverage equipment, affecting the use of the paper plastic container 100.

[0086] Please see again Figure 4 In some embodiments, the ratio w2 / h2 of the line width w2 of the paper-molded outer edge 12 to the thickness h2 of the paper-molded outer edge 12 is in the range of 8≤w2 / h2≤13.

[0087] Specifically, the ratio w2 / h2 of the line width w2 of the paper plastic outer edge 12 to the thickness h2 of the paper plastic outer edge 12 can be but is not limited to 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, etc.

[0088] In this embodiment, if the ratio w2 / h2 of the line width w2 of the paper plastic outer edge 12 to the thickness h2 of the paper plastic outer edge 12 is too small, the appearance of the paper plastic container 100 will be affected. When the paper plastic container 100 is used with a beverage device, the installation and positioning of the paper plastic container 100 will be affected. If the ratio w2 / h2 of the line width w2 of the paper plastic outer edge 12 to the thickness h2 of the paper plastic outer edge 12 is too large, the width of the paper plastic outer edge 12 is too wide or the thickness of the paper plastic outer edge 12 is too thin, which reduces the mechanical strength of the paper plastic outer edge 12 and makes the paper plastic outer edge 12 easily deformed. In addition, the preparation cost of the paper plastic container 100 is increased.

[0089] In some embodiments, the line width w2 of the paper plastic outer edge 12 is in the range of 2.15mm≤w2≤2.55mm. Specifically, the line width w2 of the paper plastic outer edge 12 may be, but is not limited to, 2.15mm, 2.2mm, 2.25mm, 2.3mm, 2.35mm, 2.4mm, 2.45mm, 2.5mm, 2.55mm, etc. If the line width w2 of the paper plastic outer edge 12 is too small, the appearance of the paper plastic container 100 will be affected, and when the paper plastic container 100 is used with a beverage device, the installation and positioning of the paper plastic container 100 will be affected; if the line width w2 of the paper plastic outer edge 12 is too large, the mechanical strength of the paper plastic outer edge 12 will be reduced, making the paper plastic outer edge 12 easily deformed, and in addition, the preparation cost of the paper plastic container 100 will be increased.

[0090] Please see again Figure 4 In some embodiments, the ratio w3 / h3 of the line width w3 of the paper plastic boss 13 to the thickness h3 of the paper plastic boss 13 is in the range of 0.83≤w3 / h3≤2.

[0091] Specifically, the ratio w3 / h3 of the line width w3 of the paper plastic boss 13 to the thickness h3 of the paper plastic boss 13 may be, but is not limited to, 0.83, 0.85, 0.9, 1.0, 1.2, 1.4, 1.5, 1.6, 1.8, 2.0, etc.

[0092] In this embodiment, the ratio w3 / h3 of the line width w3 of the paper plastic boss 13 to the thickness h3 of the paper plastic boss 13 is too small, then the line width of the paper plastic boss 13 may be too small, which reduces the mechanical strength of the paper plastic boss 13. When the paper plastic container 100 is used with the beverage device, it is not conducive to the position limitation of the paper plastic container 100 and the beverage device. Or the thickness of the paper plastic boss 13 is too thick, which increases the preparation cost of the paper plastic container 100 and affects the cooperation between the paper plastic container 100 and the beverage device. The ratio w3 / h3 of the line width w3 of the boss 13 to the thickness h3 of the paper plastic boss 13 is too large. The line width of the paper plastic boss 13 may be too wide, which increases the preparation cost of the paper plastic container 100, or the thickness of the paper plastic boss 13 is too thin, which reduces the mechanical strength of the paper plastic boss 13 and makes the paper plastic boss 13 easily deformed. In addition, the limiting effect of the paper plastic boss 13 is reduced. When the paper plastic container 100 is used in conjunction with a beverage device, it is not conducive to the limiting cooperation between the paper plastic boss 13 and the beverage device.

[0093] In some embodiments, the line width w3 of the paper plastic boss 13 is in the range of 1.1mm≤w3≤1.5mm. Specifically, the line width w3 of the paper plastic boss 13 may be, but is not limited to, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, etc. If the line width w3 of the paper plastic boss 13 is too small, the mechanical strength of the paper plastic boss 13 is reduced, and when the paper plastic container 100 is used with a beverage device, it is not conducive to the position limiting of the paper plastic container 100 and the beverage device; if the line width w3 of the paper plastic boss 13 is too large, the preparation cost of the paper plastic container 100 is increased.

[0094] Optionally, the outer circumference of the paper plastic boss 13 is arc-shaped. Optionally, the arc shape may be, but is not limited to, a circular arc shape, an elliptical arc shape, etc. Optionally, the radius of curvature of the outer circumference of the paper plastic boss 13 is 0.6 mm to 1 mm; specifically, it may be, but is not limited to, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. The arc-shaped design of the paper plastic boss 13 can make the paper plastic container 100 have a better appearance; and the arc-shaped boss makes the paper plastic container 100 easier to shape, which is conducive to demoulding of the paper plastic container 100.

[0095] Please see again Figure 4In some embodiments, the paper plastic cup body 11 includes a connected cup body portion 111 and an outward expansion portion 112, the cup body portion 111 encloses a first sub-cavity 141, the outward expansion portion 112 is arranged around the outer circumference of the cup body portion 111, the end of the outward expansion portion 112 away from the cup body portion 111 is the opening, the outward expansion portion 112 encloses a second sub-cavity 142, the first sub-cavity 141 and the second sub-cavity 142 constitute the accommodating cavity 14, the caliber of the outward expansion portion 112 is larger than the caliber of the cup body portion 111, and the end of the outward expansion portion 112 away from the cup body portion 111 is connected to the paper plastic outer edge 12.

[0096] It can be understood that the size of the outward expansion portion 112 is outward compared to the size of the cup body.

[0097] A plurality of paper plastic containers 100 are usually stacked together for easy storage and transportation. When in use, the stacked paper plastic containers 100 need to be separated. If the expansion portion 112 is not provided, since the friction force of the adjacent paper plastic containers 100 on it is large, a large force needs to be applied when separating the paper plastic containers 100, which may easily damage the paper plastic containers 100.

[0098] In this embodiment, the paper plastic cup body 11 includes a connected cup body portion 111 and an outer expansion portion 112, the diameter of the outer expansion portion 112 is larger than the diameter of the cup body portion 111, and one end of the outer expansion portion 112 away from the cup body portion 111 is connected to the paper plastic outer edge 12. This is conducive to stacking multiple paper plastic containers 100, and can make the stacked multiple paper plastic containers 100 easier to separate. When the multiple paper plastic containers 100 are separated, the paper plastic containers 100 will not be damaged due to excessive force.

[0099] In some embodiments, the size △d of the expansion portion 112 compared to the cup body 111 is in the range of 1.1mm≤△d≤1.5mm. Specifically, the size △d of the expansion portion 112 compared to the cup body 111 can be, but not limited to, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, etc. If the size △d of the expansion portion 112 compared to the cup body 111 is too small, it will not facilitate the separation of the stacked paper and plastic containers 100. If the size △d of the expansion portion 112 compared to the cup body 111 is too large, it will affect the appearance of the paper and plastic container 100.

[0100] Please see again Figure 4In some embodiments, the line width w1 of the expansion portion 112 is in the range of 3.2 mm ≤ w1 ≤ 3.6 mm. The line width w1 of the expansion portion 112 may be, but is not limited to, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, etc. If the line width w1 of the expansion portion 112 is too small, it will not facilitate the separation of the stacked paper and plastic containers 100. If the line width w1 of the expansion portion 112 is too large, it will affect the appearance of the paper and plastic container 100.

[0101] Figure 5 The paper-plastic container 100 of another embodiment of the present application is Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0102] See also Figure 5 In some embodiments, the paper plastic container 100 further includes a barrier layer 20, and the barrier layer 20 covers the surface of the paper plastic cup body 11 facing the accommodating cavity 14. The barrier layer 20 can prevent water vapor and oxygen from entering the accommodating cavity 14, thereby preventing the powder contained in the paper plastic container 100 from absorbing moisture or being oxidized and deteriorating, thereby better improving the storage time and shelf life of the target object in the paper plastic container 100.

[0103] Optionally, the barrier layer 20 also covers the surface of the paper plastic outer edge 12 and the paper plastic boss 13 .

[0104] Optionally, the barrier layer 20 may be a single layer or multiple layers (ie, a composite film layer).

[0105] Optionally, the material of the barrier layer 20 may be, but is not limited to, polyacrylate.

[0106] Optionally, the thickness of the barrier layer 20 ranges from 60 μm to 80 μm. Specifically, the thickness of the barrier layer 20 may be, but is not limited to, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, etc. If the thickness of the barrier layer 20 is too thin, the barrier effect of the barrier layer 20 is reduced, and if the thickness of the barrier layer 20 is too thick, the cost of the barrier layer 20 is increased.

[0107] Figure 6 The paper-plastic container 100 of another embodiment of the present application is Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0108] See also Figure 6 In some embodiments, the paper plastic container 100 further includes a sacrificial portion 15 (also called a waste edge), wherein the sacrificial portion 15 is connected to one end of the paper plastic boss 13 away from the paper plastic outer edge 12 , and the sacrificial portion 15 is arranged around the periphery of the paper plastic boss 13 .

[0109] It should be noted that the sacrificial part 15 is an integral structure with the paper plastic cup body 11, the paper plastic outer edge 12 and the paper plastic boss 13. The sacrificial part 15, the paper plastic cup body 11, the paper plastic outer edge 12 and the paper plastic boss 13 can be made in the same process by an integrated molding method using pulp molding.

[0110] It should be noted that the sacrificial portion 15 is used to accommodate the target object in the paper-plastic container 100 and will be cut off after being made into a beverage capsule. Therefore, when the paper-plastic container 100 is used for beverage capsules, the finished beverage capsule does not have the sacrificial portion 15 .

[0111] In this embodiment, by providing the sacrificial portion 15, it is beneficial to coat the barrier layer 20, so that the barrier layer 20 can be better adhered to the surface of the paper plastic container 100 having the accommodating cavity 14, thereby avoiding stratification between the paper plastic container 100 and the barrier layer 20, so that the paper plastic container 100 has better water and oxygen barrier effects.

[0112] Optionally, the ratio of the line width w4 of the sacrificial portion 15 to the thickness h4 of the sacrificial portion 15 is in the range of 9≤w4 / h4≤34. Specifically, the ratio of the line width w4 of the sacrificial portion 15 to the thickness h4 of the sacrificial portion 15 may be, but not limited to, 9, 12, 15, 18, 20, 23, 25, 28, 30, 32, 34, etc. If the ratio of the line width w4 of the sacrificial portion 15 to the thickness h4 of the sacrificial portion 15 is too small, the line width w4 of the sacrificial portion 15 may be too small, which is not conducive to the coating of the barrier layer 20; or the thickness h4 of the sacrificial portion 15 is too thick, which increases the preparation cost of the paper plastic container 100. If the ratio of the line width w4 of the sacrificial portion 15 to the thickness h4 of the sacrificial portion 15 is too large, the line width w4 of the sacrificial portion 15 may be too large, which reduces the mechanical strength of the sacrificial portion 15, making the sacrificial portion 15 easily deformed, which is also not conducive to the coating of the barrier layer 20; or if the thickness h4 of the sacrificial portion 15 is too thin, the mechanical strength of the sacrificial portion 15 may be reduced, making the sacrificial portion 15 easily deformed, which is also not conducive to the coating of the barrier layer 20.

[0113] In some embodiments, the thickness h4 of the sacrificial portion 15 is in the range of 0.35 mm ≤ h4 ≤ 0.45 mm. Specifically, the thickness h4 of the sacrificial portion 15 may be, but is not limited to, 0.35 mm, 0.36 mm, 0.38 mm, 0.40 mm, 0.42 mm, 0.44 mm, 0.45 mm, etc. If the thickness h4 of the sacrificial portion 15 is too thin, the mechanical strength of the sacrificial portion 15 is reduced, making the sacrificial portion 15 easily deformable, which is also not conducive to the coating of the barrier layer 20; if the thickness h4 of the sacrificial portion 15 is too thick, the preparation cost of the paper-plastic container 100 is increased.

[0114] Optionally, the thickness of the sacrificial portion 15 is greater than the thickness of the paper-plastic outer edge 12 , and the thickness of the sacrificial portion 15 is less than the thickness of the paper-plastic cup body 11 .

[0115] Optionally, the line width w4 of the sacrificial portion 15 is in the range of 4mm≤w4≤12mm. Specifically, the line width w4 of the sacrificial portion 15 may be, but is not limited to, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, etc. If the line width w4 of the sacrificial portion 15 is too small, it is not conducive to the lamination of the barrier layer 20; if the line width w4 of the sacrificial portion 15 is too large, the preparation cost of the paper-plastic container 100 is increased.

[0116] Optionally, a surface of the paper-plastic container 100 facing away from the accommodating cavity 14 has a decorative pattern, and the decorative pattern is used to make the paper-plastic container 100 have a better appearance.

[0117] Figure 7 Schematic diagram of the cross-sectional structure of a beverage capsule 200 according to an embodiment of the present application.

[0118] See also Figure 7 The embodiment of the present application further provides a beverage capsule 200, which comprises: the paper plastic container 100 described in the embodiment of the present application, beverage powder and a sealing cover 210. The beverage powder is contained in the containing cavity 14 of the paper plastic container 100; the sealing cover 210 is used to seal the containing cavity 14, and the sealing cover 210 is bonded to the paper plastic outer edge 12 to prevent water vapor from entering the paper plastic container 100 and prevent the beverage powder in the paper plastic container 100 from leaking.

[0119] The beverage capsule 200 in the embodiment of the present application may be, but is not limited to, a coffee capsule, a tea capsule, a beverage capsule, etc.

[0120] Optionally, the beverage powder may be but is not limited to at least one of coffee powder, tea powder, beverage powder, and the like.

[0121] Optionally, the sealing cover 210 may be, but is not limited to, silicone oil paper.

[0122] Optionally, the thickness of the sealing cover 210 ranges from 0.08 mm to 0.12 mm. Specifically, the thickness of the sealing cover 210 may be, but is not limited to, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm, 0.12 mm, etc. If the thickness of the sealing cover 210 is too small, the mechanical strength of the sealing cover 210 is reduced, making the sealing cover 210 easily damaged; if the thickness of the sealing cover 210 is too large, the cost of the sealing cover 210 is increased.

[0123] In some embodiments, when the paper-plastic container 100 contains a liquid at 100° C., it rotates at a speed of 5000 rad / min to 8000 rad / min and can withstand a rotation time of 60 s to 180 s.

[0124] Specifically, when water, coffee or beverage at 100° C. is placed in the paper plastic container 100, the paper plastic container 100 is rotated at a speed of 5000 rad / min to 8000 rad / min for 60 seconds to 180 seconds, and the paper plastic container 100 remains intact without deformation.

[0125] Optionally, when the paper-plastic container 100 holds a liquid at 100° C. and rotates for 60 to 180 seconds, the rotation rate that can be tolerated may be, but is not limited to, 5000 rad / min, 6000 rad / min, 7000 rad / min, 8000 rad / min, etc.

[0126] Optionally, when the paper-plastic container 100 holds a liquid at 100° C. and rotates at a speed of 5000 rad / min to 8000 rad / min, the rotation time that can be tolerated may be, but is not limited to, 60 s, 70 s, 80 s, 90 s, 100 s, 110 s, 120 s, 130 s, 140 s, 150 s, 160 s, 170 s, 180 s, etc.

[0127] The paper-plastic container 100 of the embodiment of the present application has high mechanical strength, good heat resistance and water resistance. When enclosed in a high-temperature liquid of 100°C, it can withstand a high-speed rotation of 5000rad / min to 8000rad / min, and after rotating for 60s to 180sin, it remains intact and does not deform.

[0128] In some embodiments, the paper-plastic container 100 is manufactured by using a concave mold to absorb slurry and then undergoing shaping and hot pressing.

[0129] The paper-plastic container 100 of the related art adopts a convex mold to absorb slurry. When the convex mold absorbs slurry for preparing products of unequal thickness, especially when the position near the edge is a thinner area, the direction of the extrusion pressure on the paper-plastic slurry on the convex mold is to push the paper-plastic slurry downward, so that the slurry at the thin edge plane of the product is thickened. If the slurry is too thick, it is necessary to increase the pressure to squeeze in order to make the thin edge reach the required thickness. The high pressure and high temperature damage the fiber, making the thin edge position transparent, brittle, and easy to break. The paper-plastic container 100 of the embodiment of the present application adopts a concave mold to absorb slurry. When the position near the edge of the paper-plastic container 100 is a thinner area, for example, the thickness of the paper-plastic outer edge 12 is less than the thickness of the paper-plastic cup body 11, during extrusion shaping, the extrusion pressure at the position corresponding to the paper-plastic outer edge 12 can better wrap and constrain the paper-plastic slurry; when the slurry is pressed into the concave mold, due to the limitation of the concave mold cavity wall, the paper-plastic slurry is easier to extend evenly in all directions, and the paper-plastic slurry will not be pressed to the thin edge. The slurry thickness of the thin edge meets the requirements, and no excessive pressure is required.

[0130] The paper-plastic container 100 of the embodiment of the present application can be prepared by the method described in the following embodiment of the present application. In addition, it can also be prepared by other methods. The preparation method of the embodiment of the present application is only one or more preparation methods of the paper-plastic container 100 of the present application, and should not be understood as a limitation on the paper-plastic container 100 provided in the embodiment of the present application.

[0131] See also Figure 8 The present application embodiment provides a method for preparing a paper-plastic container 100, which comprises:

[0132] S201, providing a pulp absorption mold and a paper-plastic pulp, wherein the paper-plastic pulp comprises sugarcane fiber and wood fiber, and in the paper-plastic pulp, the mass ratio of the sugarcane fiber to the wood fiber is in a range of 55:45 to 65:35;

[0133] It can be understood that the proportion of sugarcane fiber in the fibers of the paper and plastic pulp ranges from 55% to 65%; the proportion of wood fiber in the fibers of the paper and plastic pulp ranges from 35% to 45%.

[0134] Specifically, the proportion of sugarcane fiber in the fiber of the paper plastic slurry can be, but is not limited to, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, etc. If the proportion of sugarcane fiber in the fiber of the paper plastic slurry is too small, the content of wood pulp fiber is too much. When the paper plastic container 100 is of unequal thickness, the thicker the thin edge (i.e., the thinner position) on the paper plastic container 100 is, the greater the hot pressing pressure is required. If the hot pressing pressure is too large, the thinner position on the paper plastic container 100 will be easily blackened and broken; if the proportion of sugarcane fiber in the fiber of the paper plastic slurry is too large, the content of wood pulp fiber is too small, and the prepared paper plastic container 100 is brittle, and the thinner position on the paper plastic container 100 is prone to brittle fracture.

[0135] Specifically, the proportion of wood fiber in the fiber of the paper plastic slurry can be, but is not limited to, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, etc. If the proportion of wood fiber in the fiber of the paper plastic slurry is too small, the content of sugarcane fiber in the paper plastic container 100 is too much, and the prepared paper plastic container 100 is brittle, and the thinner position on the paper plastic container 100 is prone to brittle fracture; if the proportion of wood fiber in the fiber of the paper plastic slurry is too large, the content of sugarcane fiber in the paper plastic container 100 is too small. When the paper plastic container 100 is of unequal thickness, the thicker the thin edge (i.e., the thinner position) on the paper plastic container 100, the greater the hot pressing pressure is required. If the hot pressing pressure is too large, the thinner position on the paper plastic container 100 will be easily blackened and broken.

[0136] S202, placing the slurry absorption mold in the paper-plastic slurry to absorb the slurry, and after shaping, obtaining a paper-plastic blank; and

[0137] Optionally, a paper-mold production device (not shown) is provided, the paper-mold production device includes a slurry suction mold 300 (such as Fig. 9 The invention further comprises a vacuum device (not shown in the figure), a slurry tank (not shown in the figure) and an extrusion die (not shown in the figure), wherein the vacuum device is connected to the slurry suction die 300 to form a negative pressure in the slurry suction die 300. The slurry tank is used to set the paper-plastic slurry, and the extrusion die is used to close the mold with the slurry suction die 300 to shape the paper-plastic slurry. During slurry suction, the slurry suction die 300 is placed in the paper-plastic slurry, and the slurry suction die 300 is vacuumed, so that the paper-plastic slurry is uniformly adsorbed on the slurry suction die 300. After the slurry suction is completed, the slurry suction die 300 is turned over, and the slurry suction die 300 is closed with the extrusion die to shape the paper-plastic slurry, thereby obtaining a paper-plastic blank.

[0138] Optionally, the time of slurry suction may be, but is not limited to, 2.8s to 3.2s. Specifically, the time of slurry suction may be, but is not limited to, 2.8s, 2.9s, 3.0s, 3.1s, 3.2s, etc.

[0139] Optionally, the slurry absorption mold 300 may absorb slurry once or multiple times. The specific number of slurry absorptions may be designed according to the thickness of the paper plastic container 100 to be prepared. The more times the slurry is absorbed, the thicker the paper plastic container 100 is.

[0140] S203 , hot pressing the paper-plastic blank to obtain the paper-plastic container 100 .

[0141] The paper plastic container 100 prepared by the preparation method of the paper plastic container 100 of the embodiment of the present application includes, by mass fraction, 55% to 65% of sugar cane fiber and 35% to 45% of wood fiber. The paper plastic container 100 of the embodiment of the present application has high mechanical strength, high rigidity and stiffness by designing the compounding and proportion of sugar cane fiber and wood fiber; in addition, the thickness of the paper plastic container 100 is more uniform, the surface is smoother, and it is less likely to have layout defects. Furthermore, the paper plastic container 100 of the embodiment of the present application is prepared using renewable and degradable materials, has good degradability, and will not pollute the environment.

[0142] In some embodiments, the slurry suction mold 300 is a concave mold, and the slurry suction mold 300 has a concave mold cavity.

[0143] The paper-plastic container 100 of the related technology adopts a convex mold to absorb slurry. When the convex mold is used to prepare products of unequal thickness, especially when the area near the edge is thinner, the paper-plastic slurry on the convex mold is subjected to extrusion pressure in the direction of pushing the paper-plastic slurry downward, thereby thickening the slurry at the thin edge plane of the product. If the slurry is too thick, it is necessary to increase the pressure to squeeze in order to make the thin edge reach the required thickness. The high pressure and high temperature damage the fibers, making the thin edge position translucent, brittle, and easy to break.

[0144] The paper-plastic container 100 of the embodiment of the present application adopts a concave mold to absorb slurry. When the position near the edge of the paper-plastic container 100 is a thinner area, for example, the thickness of the paper-plastic outer edge 12 is less than the thickness of the paper-plastic cup body 11, during extrusion shaping, the extrusion pressure at the position corresponding to the paper-plastic outer edge 12 can better wrap and restrain the paper-plastic slurry; when the slurry is pressed into the concave mold, due to the limitation of the concave mold cavity wall, the paper-plastic slurry is easier to extend evenly in all directions, and the paper-plastic slurry will not be pressed to the thin edge. The slurry thickness of the thin edge meets the requirements and does not require too much pressure.

[0145] See also Fig. 9 and Fig.10 In some embodiments, the slurry absorption mold 300 includes a slurry absorption mold body 310, a first mesh surface 320 and a second mesh surface 330; the slurry absorption mold body 310 has a concave mold cavity 312, the first mesh surface 320 and the second mesh surface 330 are sequentially stacked on the surface of the side wall surrounding the concave mold cavity 312, the slurry absorption mold body 310 has a plurality of first through holes 311 located in the concave mold cavity 312 and arranged at intervals, the first mesh surface 320 has a plurality of first mesh holes 321 arranged at intervals, the second mesh surface 330 has a plurality of second mesh holes 331 arranged at intervals, the aperture of the first through hole 311 is larger than the aperture of the first mesh hole 321, and the aperture of the first mesh hole 321 is larger than the aperture of the second mesh hole 331.

[0146] In some embodiments, the first through holes 311 are evenly distributed on the entire inner wall of the concave mold cavity 312. In other embodiments, the multiple first through holes 311 on the entire inner wall of the concave mold cavity 312 include multiple groups of first through holes 311, each group of first through holes 311 includes multiple first through holes 311, and the distribution density of different groups of first through holes 311 is different, and the distribution density of the same group of first through holes 311 is the same. Through the differentiated design of the distribution density of the first through holes 311 in different areas, different areas can have different suction forces, and different amounts of paper-plastic slurry can be adsorbed, which is conducive to the preparation of paper-plastic containers 100 of different thicknesses.

[0147] It can be understood that each of the first through holes 311 is connected to the female mold cavity 312 .

[0148] In this embodiment, a plurality of first through holes 311 are arranged at intervals on the concave mold cavity 312 of the slurry absorption mold body 310, and negative pressure can be formed through the plurality of first through holes 311, thereby forming suction force to absorb the paper plastic slurry on the concave mold cavity 312 of the slurry absorption mold 300. A first mesh surface 320 and a second mesh surface 330 are arranged on the surface of the concave mold cavity 312, and the aperture of the first through hole 311 is made larger than the aperture of the first mesh hole 321, and the aperture of the first mesh hole 321 is larger than the aperture of the second mesh hole 331, so that the paper plastic slurry can be better absorbed on the second mesh surface 330, and the paper plastic slurry is prevented from being sucked into the first through hole 311 and blocking the first through hole 311, thereby making the slurry absorption uneven, and the thickness of the obtained paper plastic container 100 uneven.

[0149] In some embodiments, the aperture of the first through hole 311 ranges from 1.8 mm to 2.5 mm. Specifically, the aperture of the first through hole 311 may be, but is not limited to, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc. If the size of the first through hole 311 is too small, the suction force provided by the first through hole 311 for slurry absorption is small, which reduces the adsorption of the slurry absorption mold 300 to the paper plastic slurry, making it difficult to make the thickness of the prepared paper plastic container 100 thicker. In addition, it is easy to make the slurry absorption uneven, and the thickness of the prepared paper plastic container 100 is uneven; if the size of the first through hole 311 is too large, the paper plastic slurry is easily sucked away by the vacuum suction through the first through hole 311, thereby causing the loss of paper plastic slurry and increasing the preparation cost of the paper plastic container 100; in addition, it will also affect the morphology of the paper plastic container 100, so that a plurality of convex points are formed on the inner surface of the paper plastic container 100.

[0150] Optionally, the spacing between two adjacent first through holes 311 ranges from 2 mm to 4 mm. Specifically, the spacing between two adjacent first through holes 311 may be, but is not limited to, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3.0 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, etc. If the spacing between two adjacent first through holes 311 is too small, when the slurry suction mold 300 has a large slurry suction force, the slurry suction mold 300 is easily deformed, which reduces the service life of the slurry suction mold 300; in addition, the deformation of the slurry suction mold 300 causes the obtained paper plastic container 100 to be deformed, which reduces the preparation yield of the paper plastic container 100. If the spacing between two adjacent first through holes 311 is too large, it is easy to cause uneven slurry suction, and the thickness of the obtained paper plastic container 100 is uneven, which reduces the appearance effect of the paper plastic container 100.

[0151] Optionally, the mesh number of the first mesh 321 ranges from 30 mesh to 50 mesh. Specifically, the mesh number of the first mesh 321 may be, but is not limited to, 30 mesh, 32 mesh, 34 mesh, 36 mesh, 38 mesh, 40 mesh, 42 mesh, 44 mesh, 46 mesh, 48 mesh, 50 mesh, etc. If the mesh number of the first mesh 321 is too small, the aperture of the first mesh 321 is too large, and the paper-plastic slurry is easily sucked away by the vacuum suction through the first mesh 321, resulting in the loss of the paper-plastic slurry, which increases the preparation cost of the paper-plastic container 100; if the mesh number of the first mesh 321 is too large, the aperture of the first mesh 321 is too small, and after the slurry suction mold 300 has finished absorbing, it is not conducive to sucking away the moisture in the paper-plastic slurry by vacuum suction.

[0152] Optionally, the mesh number of the second mesh 331 ranges from 70 mesh to 90 mesh. Specifically, the mesh number of the second mesh 331 may be, but is not limited to, 70 mesh, 72 mesh, 74 mesh, 76 mesh, 78 mesh, 80 mesh, 82 mesh, 84 mesh, 86 mesh, 88 mesh, 90 mesh, etc. If the mesh number of the second mesh 331 is too small, the aperture of the second mesh 331 is too large, and the paper-plastic slurry is easily sucked away by the vacuum suction through the second mesh 331, causing the paper-plastic slurry to be lost, increasing the preparation cost of the paper-plastic container 100; if the mesh number of the second mesh 331 is too large, the aperture of the second mesh 331 is too small, and after the slurry suction mold 300 has finished absorbing, it is not conducive to sucking away the moisture in the paper-plastic slurry by vacuum suction.

[0153] In some embodiments, in S203, the hot pressing of the paper-plastic blank to obtain the paper-plastic container 100 includes:

[0154] S2031, providing a hot pressing upper mold and a hot pressing lower mold, wherein the hot pressing upper mold and the hot pressing lower mold enclose a hot pressing mold cavity;

[0155] Alternatively, if Fig.11 As shown, the paper-plastic production equipment further includes a hot pressing mold 400, which includes a hot pressing upper mold 410 and a hot pressing lower mold 420. The hot pressing upper mold 410 and the hot pressing lower mold 420 are molded together to form a hot pressing mold cavity.

[0156] S2032, transferring the paper-plastic blank into a hot pressing mold cavity for hot pressing molding to obtain the paper-plastic container 100, wherein the temperature of the hot pressing upper mold 410 is in the range of 120°C to 140°C, the temperature of the hot pressing lower mold 420 is in the range of 130°C to 150°C, and the hot pressing pressure is in the range of 0.5Mpa to 0.8Mpa.

[0157] Optionally, after the paper-plastic blank is shaped, the paper-plastic blank is transferred to the hot-pressing lower mold 420 , and the hot-pressing upper mold 410 and the hot-pressing lower mold 420 are combined and hot-pressed to obtain the paper-plastic container 100 .

[0158] Specifically, the temperature of the hot pressing upper mold 410 may be, but is not limited to, 120°C, 122°C, 124°C, 126°C, 128°C, 130°C, 132°C, 134°C, 136°C, 138°C, 140°C, etc. If the temperature of the hot pressing upper mold 410 is too low, the water in the paper plastic blank will not evaporate completely, affecting the forming of the paper plastic container 100; in addition, if the temperature of the hot pressing upper mold 410 is too low, oxygen is likely to remain in the obtained paper plastic container 100, and there are pores, which reduces the water vapor and oxygen barrier of the paper plastic container 100; if the temperature of the hot pressing upper mold 410 is too high, the obtained paper plastic container 100 is likely to be scorched, affecting the yield of the paper plastic container 100.

[0159] Specifically, the temperature of the hot pressing lower mold 420 may be, but is not limited to, 130°C, 132°C, 134°C, 136°C, 138°C, 140°C, 142°C, 144°C, 146°C, 148°C, 150°C, etc. If the temperature of the hot pressing lower mold 420 is too low, the water in the paper plastic blank will not evaporate completely, affecting the forming of the paper plastic container 100; in addition, if the temperature of the hot pressing lower mold 420 is too low, oxygen is likely to remain in the obtained paper plastic container 100, and there are pores, which reduces the water vapor and oxygen barrier properties of the paper plastic container 100; if the temperature of the hot pressing lower mold 420 is too high, the obtained paper plastic container 100 is likely to be scorched, affecting the yield of the paper plastic container 100.

[0160] Optionally, the hot pressing pressure may be, but is not limited to, 0.5 MPa, 0.55 MPa, 0.6 MPa, 0.65 MPa, 0.7 MPa, 0.75 MPa, 0.8 MPa, etc. If the hot pressing pressure is too low, the paper-plastic container 100 may not be well formed, and the yield rate may be reduced; if the hot pressing pressure is too high, the paper-plastic container 100 may be easily crushed, and the yield rate may also be reduced.

[0161] Optionally, the holding time of the hot press molding is 130s to 145s. Specifically, the holding time of the hot press molding may be, but is not limited to, 130s, 132s, 134s, 136s, 138s, 140s, 142s, 144s, 145s, etc. If the holding time of the hot press molding is too short, the molding of the paper-plastic container 100 is not good, and the yield is reduced; if the holding time of the hot press molding is too long, the preparation yield of the paper-plastic container 100 is reduced.

[0162] like Figures 11 to 13 As shown, in some embodiments, the hot pressing lower mold 420 includes a lower mold body 421 and a third mesh surface 422, the lower mold body 421 is a convex mold, and the lower mold body 421 includes a convex mold part (not shown), the convex mold part has a plurality of second through holes 4212 arranged at intervals, the third mesh surface 422 is arranged on the surface of the convex mold part and covers the plurality of second through holes 4212, the aperture of the second through holes 4212 ranges from 1.8 mm to 2.5 mm, and the distance between two adjacent second through holes 4212 ranges from 8 mm to 15 mm.

[0163] Optionally, the plurality of second through holes 4212 are evenly distributed on the male mold portion.

[0164] Specifically, the aperture of the second through hole 4212 may be, but is not limited to, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, etc. The second through hole 4212 is provided on the lower mold body 421 so that when the hot pressing upper mold 410 and the hot pressing lower mold 420 are combined for hot pressing, it is beneficial to remove the water vapor on the paper plastic container 100; in addition, the second through hole 4212 is beneficial for the hot pressing lower mold 420 to form a positive pressure or a negative pressure, thereby adsorbing the paper plastic product, or blowing up the paper plastic product. If the aperture of the second through hole 4212 is too small, the exhaust is poor, which is not conducive to the adsorption and blowing up of the paper plastic tea; if the aperture of the second through hole 4212 is too large, when blowing air into the second through hole 4212, it is easy to blow the paper plastic container 100.

[0165] Specifically, the spacing between two adjacent second through holes 4212 may be, but is not limited to, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc. If the spacing between two adjacent second through holes 4212 is too small, the density of the second through holes 4212 is too dense, and the hot pressing lower mold 420 is easily deformed when heated, which reduces the preparation yield of the paper plastic container 100; if the spacing between two adjacent second through holes 4212 is too large, the number of the second through holes 4212 is too small, which increases the pressure holding time and reduces the preparation yield of the paper plastic container 100.

[0166] Optionally, the third mesh surface 422 has a third mesh 4221, and the mesh number of the third mesh 4221 is 50 mesh to 70 mesh. Specifically, the mesh number of the third mesh 4221 can be, but is not limited to, 50 mesh, 52 mesh, 54 mesh, 56 mesh, 58 mesh, 60 mesh, 62 mesh, 64 mesh, 66 mesh, 68 mesh, 70 mesh, etc. If the mesh number of the third mesh surface 422 is too small, the aperture of the third mesh 4221 of the third mesh surface 422 is too large, which easily makes the screen printing on the surface of the prepared paper plastic container 100 too large and the surface too rough; if the mesh number of the third mesh surface 422 is too large, the aperture of the third mesh 4221 of the third mesh surface 422 is too small, which easily makes the vacuum of the hot pressing lower mold 420 poor.

[0167] The paper-plastic container 100 of the present application is further described below through specific embodiments.

[0168] Example 1

[0169] The paper-plastic container 100 of this embodiment is prepared by the following steps:

[0170] 1) A paper plastic slurry is placed in a slurry tank of a paper plastic production device, wherein the mass ratio of sugarcane fiber to wood fiber in the paper plastic slurry is 60:40; a concave mold is used as a slurry absorption mold 300, the slurry absorption mold 300 comprises a slurry absorption mold body 310, a first mesh surface 320 and a second mesh surface 330, the slurry absorption mold body 310 has a concave mold cavity 312, the first mesh surface 320 and the second mesh surface 330 are sequentially stacked on the surface of the side wall enclosing the concave mold cavity 312, and the slurry absorption mold body 310 has a concave mold cavity 312. There are a plurality of first through holes 311 located in the concave mold cavity 312 and arranged at intervals, the first mesh surface 320 has a plurality of first mesh holes 321 arranged at intervals, the second mesh surface 330 has a plurality of second mesh holes 331 arranged at intervals, the aperture of the first through hole 311 is 2.0 mm, the distance between two adjacent first through holes 311 is 3 mm, the mesh number of the first mesh hole 321 of the first mesh surface 320 is 40 meshes, and the mesh number of the second mesh hole 331 of the second mesh surface 330 is 80 meshes;

[0171] 2) Turn on the paper plastic production equipment, immerse the slurry absorption mold 300 in the paper plastic slurry to absorb the slurry, and the slurry absorption time is 3s;

[0172] 3) turning over the slurry absorption mold 300 with the paper-plastic slurry, and closing the mold with the extrusion mold to obtain a paper-plastic blank;

[0173] 4) The paper-plastic blank is transferred to the hot pressing lower mold 420 of the paper-plastic production equipment, and the hot pressing upper mold 410 is used for mold closing and hot pressing. The temperature of the hot pressing upper mold 410 is 130° C., the temperature of the hot pressing lower mold 420 is 140° C., the hot pressing pressure is 0.6 MPa, and the hot pressing time is 140 seconds. The paper-plastic container 100 is obtained.

[0174] The paper plastic container 100 of this embodiment includes a paper plastic cup body 11, a paper plastic outer edge 12, a paper plastic boss 13 and a sacrificial part 15. The paper plastic cup body 11 has a receiving cavity 14 with an opening at one end, the opening diameter d1 of the paper plastic cup body 11 is 49 mm, the thickness h1 of the paper plastic cup body 11 is 0.55 mm, the thickness h2 of the paper plastic outer edge 12 is 0.22 mm, the line width w2 of the paper plastic outer edge 12 is 2.3 mm, the thickness h3 of the paper plastic boss 13 is 2.0 mm, the line width w3 of the paper plastic boss 13 is 1.3 mm, the thickness h4 of the sacrificial part 15 is 0.4 mm, and the line width w4 of the sacrificial part 15 is 7 mm.

[0175] Example 2

[0176] The difference between this embodiment and embodiment 1 is that the mass ratio of sugarcane fiber to wood fiber in the paper-plastic slurry of this embodiment is 55:45.

[0177] Example 3

[0178] The difference between this embodiment and embodiment 1 is that the mass ratio of sugarcane fiber to wood fiber in the paper-plastic slurry of this embodiment is 65:35.

[0179] Comparative Example 1

[0180] The difference between this comparative example and Example 1 is that the slurry absorption mold 300 is a convex mold.

[0181] Comparative Example 2

[0182] The difference between this comparative example and Example 1 is that the mass ratio of sugarcane fiber to wood fiber in the paper-plastic slurry of this example is 50:50.

[0183] Comparative Example 3

[0184] The difference between this comparative example and Example 1 is that the mass ratio of sugarcane fiber to wood fiber in the paper-plastic slurry of this example is 70:30.

[0185] The following performance tests were performed on the paper-plastic container 100 of the embodiment and the comparative example:

[0186] (1) Bending test: The paper plastic container 100 of each embodiment and comparative example is folded once or multiple times along the connection between the paper plastic cup body 11 and the paper plastic outer edge 12, and the changes of the folded part of the paper plastic container 100 of each embodiment and comparative example are observed.

[0187] (2) Machine test: 1) Coat the side wall of the receiving cavity 14 of the paper-plastic product of each embodiment and comparative example with a layer of polyacrylate with a thickness of 70 μm as a barrier layer; 2) Place coffee powder in the receiving cavity 14; 3) Set a sealing cover at the opening of the receiving cavity 14, and the sealing cover is bonded to the paper-plastic outer edge 12 to seal the coffee powder in the receiving cavity 14 of the paper-plastic container 100 to obtain a beverage capsule; 4) Place the beverage capsule on a coffee machine, inject 100°C water, rotate at a speed of 6000 rad / min, and extract the coffee in the coffee capsule for 90 seconds. Observe the results of the paper-plastic container 100 of each embodiment and comparative example after the machine test.

[0188] Fig.14 This is a photo of the paper-plastic container 100 of Example 1 of the present application after being subjected to a bending test and folded eight times. Fig.15 This is a photo of the paper-plastic container 100 of Example 2 of the present application undergoing a bending test, after being folded eight times. Fig.16 This is a photo of the paper-plastic container 100 of Example 3 of the present application undergoing a bending test, after being folded eight times. Fig.17 This is a photo of the paper-plastic container 100 of comparative example 1 of the present application after being subjected to a bending test and folded once. Fig.18 This is a photo of the paper-plastic container 100 of comparative example 2 of the present application after being subjected to a bending test and folded once. Fig.19 This is a photo of the paper-plastic container 100 of comparative example 3 of the present application after being subjected to a bending test and folded once.

[0189] Fig. 20 These are photos of the paper-plastic container 100 of Example 1 of the present application after being tested on a machine, wherein (a) is a front photo and (b) is a back photo. Fig.21 This is a photo of the paper-plastic container 100 of Example 2 of the present application after being tested on a machine. Fig. 22 This is a photo of the paper-plastic container 100 of Example 3 of the present application after being tested on a machine. Fig.23 This is a photo of the paper-plastic container 100 of comparative example 1 of the present application after being tested on a machine. Fig.24 This is a photo of the paper-plastic container 100 of comparative example 2 of the present application after being tested on a machine. Fig.25 This is a photo of the paper-plastic container 100 of comparative example 3 of the present application after being tested on a machine.

[0190] From the test results of Example 1 and Comparative Example 1, it can be seen that the paper plastic container 100 of Comparative Example 1 uses a male mold slurry absorption mold 300 for slurry absorption, and the paper plastic container 100 obtained is of low mechanical strength and brittle, and will break after being folded in half once; while the paper plastic container 100 of the embodiment of the present application uses a female mold to absorb slurry, and the obtained paper plastic container 100 has better mechanical strength and toughness, and still does not break after being folded in half 8 times. After the paper plastic container 100 of Comparative Example 1 was tested on the machine, a break occurred between the paper plastic cup body 11 and the paper plastic outer edge 12; while the paper plastic container 100 of Example 1 of the present application was still intact after being tested on the machine.

[0191] From the test results of Examples 1 to 3, Comparative Examples 2 and 3, it can be seen that reducing the content of sugarcane fiber in the paper plastic slurry (Comparative Example 2) or increasing the content of sugarcane fiber in the paper plastic slurry (Comparative Example 3) will reduce the mechanical strength of the paper plastic container 100, making the paper plastic container 100 brittle and easy to break after the folding test. In addition, the paper plastic containers 100 of Examples 1 to 3 were intact after the machine test. After the paper plastic containers 100 of Comparative Examples 2 and 3 were tested on the machine, leakage occurred between the paper plastic cup body 11 and the paper plastic outer edge 12, indicating that cracks occurred between the paper plastic cup body 11 and the paper plastic outer edge 12. Therefore, when the mass ratio of sugarcane fiber to wood fiber in the paper plastic slurry is 55:45 to 65:35, the obtained paper plastic container 100 has higher mechanical strength and better toughness.

[0192] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrases in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, if there is no contradiction between them.

[0193] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the above preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A paper-plastic container, characterized in that: The paper-plastic container comprises, by mass fraction, 55% to 65% of sugarcane fiber and 35% to 45% of wood fiber.

2. The paper-plastic container according to claim 1, characterized in that: The paper-plastic container comprises: A paper-plastic cup body, wherein the paper-plastic cup body has a receiving cavity with one end open, and the receiving cavity is used to receive a target object; A paper plastic outer edge, the paper plastic outer edge is arranged around the outer circumference of the opening of the paper plastic cup body, and the paper plastic outer edge is bent and connected to the paper plastic cup body; and A paper plastic boss, the paper plastic boss is arranged on a side of the paper plastic outer edge away from the paper plastic cup body and surrounds the outer periphery of the paper plastic outer edge; The paper plastic cup body, the paper plastic outer edge and the paper plastic boss are an integrated structure, the thickness of the paper plastic boss is greater than the thickness of the paper plastic cup body, and the thickness of the paper plastic cup body is greater than the thickness of the paper plastic outer edge.

3. The paper-plastic container according to claim 1, characterized in that: When the paper-plastic container holds a liquid at 100° C., it rotates at a speed of 5000 rad / min to 8000 rad / min and can withstand a rotation time of 60 s to 180 s.

4. The paper-plastic container according to claim 1, characterized in that: The paper-plastic container is manufactured by adopting a concave mold to absorb slurry, and undergoing shaping and hot pressing.

5. A method for preparing a paper-plastic container, characterized in that: include: Provide a pulp absorption mold and a paper-plastic pulp, wherein the paper-plastic pulp comprises sugarcane fiber and wood fiber, and in the paper-plastic pulp, the mass ratio of the sugarcane fiber to the wood fiber is in the range of 55:45 to 65:35; The slurry absorption mold is placed in the paper-plastic slurry to absorb the slurry, and after shaping, a paper-plastic blank is obtained; and The paper-plastic blank is subjected to hot pressing to obtain the paper-plastic container.

6. The method for preparing a paper-plastic container according to claim 5, characterized in that: The slurry suction mold is a concave mold, and the slurry suction mold has a concave mold cavity.

7. The method for preparing a paper-plastic container according to claim 6, characterized in that: The slurry absorption mold includes a slurry absorption mold body, a first mesh surface and a second mesh surface; the slurry absorption mold body has the concave mold cavity, the first mesh surface and the second mesh surface are sequentially stacked on the surface of the side wall that encloses the concave mold cavity, the slurry absorption mold body has a plurality of first through holes located in the concave mold cavity and arranged at intervals, the first mesh surface has a plurality of first mesh holes arranged at intervals, the second mesh surface has a plurality of second mesh holes arranged at intervals, the aperture of the first through hole is larger than the aperture of the first mesh hole, and the aperture of the first mesh hole is larger than the aperture of the second mesh hole.

8. The method for preparing a paper-plastic container according to claim 7, characterized in that: The aperture of the first through hole ranges from 1.8 mm to 2.5 mm, and the distance between two adjacent first through holes ranges from 2 mm to 4 mm; the mesh number of the first mesh ranges from 30 mesh to 50 mesh, and the mesh number of the second mesh ranges from 70 mesh to 90 mesh.

9. The method for preparing a paper-plastic container according to claim 5, characterized in that: The method of hot-pressing the paper-plastic blank to obtain the paper-plastic container comprises: Providing a hot pressing upper mold and a hot pressing lower mold, wherein the hot pressing upper mold and the hot pressing lower mold enclose a hot pressing mold cavity; The paper-plastic blank is transferred to a hot pressing mold cavity for hot pressing molding to obtain the paper-plastic container, wherein the temperature of the hot pressing upper mold ranges from 120° C. to 140° C., the temperature of the hot pressing lower mold ranges from 130° C. to 150° C., and the hot pressing pressure ranges from 0.5 MPa to 0.8 MPa.

10. The method for preparing a paper-plastic container according to claim 9, characterized in that: The hot pressing lower mold includes a lower mold body and a third mesh surface, the lower mold body is a convex mold, the lower mold body includes a convex mold part, the convex mold part has a plurality of second through holes arranged at intervals, the third mesh surface is arranged on the surface of the convex mold part and covers the plurality of second through holes, the aperture of the second through holes ranges from 1.8 mm to 2.5 mm, and the spacing between two adjacent second through holes ranges from 8 mm to 15 mm.

Images