Convenient food water filtering cover film, packaging container and preparation method of packaging container

Abstract

The invention discloses a convenient food packaging container which comprises a water filtering cover, a water filtering cover uncovering tongue piece, a water filtering cover uncovering part, a water filtering cover uncovering part die cutting edge and a water filtering hole die cutting edge, and the water filtering cover is sequentially composed of a first plastic layer, a paper layer, a second plastic layer, a die cutting buffer layer, a third plastic layer, an aluminum foil layer and a heat sealing resin layer from top to bottom. The front and back side bidirectional die cutting technology is adopted, half cutting is conducted, after a consumer uncovers the container, water filtering holes are automatically formed, soup can be filtered out through the water filtering holes after the container is inclined, the bowl edge of the container is in a net-shaped design, the heat sealing strength of the bowl edge and the water filtering cover film is improved, meanwhile, the net-shaped design is connected, and the problem of air leakage of packaging cannot occur.

Description

Technical Field

[0001] The invention relates to the technical field of water filter cover films, and in particular to a water filter cover film and a packaging container for instant food and a preparation method thereof. Background Art

[0002] Mixed noodles and mixed rice noodles are prepared by taking out the noodles (rice) after cooking, sprinkling them with sauce, vegetables and other seasonings, stirring them and then eating them. They are very popular ways of eating in people's lives. Convenient foods (instant noodles, instant rice noodles, etc.) are characterized by convenience and fast food, and they are consumed by a very large group of people. Mixed noodles and mixed rice noodles, etc., developed in combination with people's eating habits, have received good market response. The method of providing water filter holes on the cover film of the packaging container of mixed noodles and mixed rice noodles greatly facilitates consumers' consumption and improves their experience. This packaging container will affect the sealing of the cover film, the water filter holes may be torn and damaged, and the soup may overflow. In response to this problem, the present invention provides a water filter cover film for mixed noodles, its material structure and a container with enhanced sealing. Summary of the invention

[0003] In view of the above deficiencies in the prior art, the object of the invention is to provide a convenient food water filter cover film and packaging container and a preparation method thereof to solve the problems raised in the above background technology.

[0004] The first aspect of the present invention provides a convenient food packaging container, which consists of a water filter and a water filter cover opening part. The water filter cover is provided with a water filter cover opening tongue on the upper part, and the water filter cover opening part is composed of a water filter cover opening part die-cut edge and a water filter hole die-cut edge. The water filter cover is composed of a first plastic layer, a paper layer, a second plastic layer, a die-cut buffer layer, a third plastic layer, an aluminum foil layer, and a heat-sealing resin layer from top to bottom.

[0005] Preferably, the first plastic layer includes one of PET (polyethylene terephthalate), BOPP (biaxially oriented polypropylene film), BOPE (biaxially oriented polyethylene film), and MDOPE (uniaxially oriented polyethylene); the paper layer includes one of coated paper and offset paper;

[0006] The second plastic layer includes one of PET and BOPP; the die-cutting buffer layer uses co-extruded polyethylene;

[0007] The third plastic layer includes one of PET and BOPP;

[0008] The aluminum foil layer includes one of AL6, 7, 9, 11, and 16um thickness; the heat-sealing resin layer includes one of polyethylene and EVA (ethylene-vinyl acetate copolymer).

[0009] Preferably, the die-cut buffer layer is composed of 60%-80% low-density polyethylene, 10%-20% linear polyethylene, and 10%-20% EMAA (ethylene methacrylic acid copolymer), with a specific ratio of 3-4:1.5:1.5.

[0010] In a second aspect of the present invention, the water filter cover membrane is composed of a first plastic layer, a paper layer, a second plastic layer, a die-cutting buffer layer, a third plastic layer, an aluminum foil layer and a heat-sealing resin layer.

[0011] The third aspect of the present invention is a method for preparing a convenient food packaging container, comprising the following steps:

[0012] Preparation of the filter cover:

[0013] First, the preparation method of the die-cutting buffer layer is: automatically mixing materials according to the proportion of the die-cutting buffer layer by a co-extruder, heating, and melting the mixed materials, and the melting temperature is 230°C-270°C;

[0014] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer and the third plastic layer, and the thickness of the extruded material is 15um-30um;

[0015] The first plastic layer and paper layer are printed by a printing machine, and the remaining layers are compounded by dry compounding or solvent-free compounding. During compounding, the unwinding tension is controlled at 15-20kg, and the winding tension is controlled at 20-25kg. After compounding, it is naturally cured in a curing room for 12-48 hours.

[0016] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 140um-150um, and the half-cutting depth of the back die-cutting is 58um-65um;

[0017] The die-cut buffer layer and the heat-sealing resin layer are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding to obtain the water filter cover;

[0018] Remolding, demoulding, cooling, cutting, molding temperature 140 ℃ -150 ℃, cooling time 20-30S; finally, the parts are opened together to form a packaging container.

[0019] The beneficial effects of the present invention are as follows:

[0020] Compared with the prior art, the water filter cover film and packaging container of the present invention have the following advantages:

[0021] It adopts a two-way die-cutting process on both the front and back sides, and both are half-cut. When the consumer opens it, a water filter hole is automatically generated. After tilting the container, the soup can be filtered out through the water filter hole. The edge of the container bowl adopts a mesh design to increase the heat sealing strength with the water filter cover film. At the same time, the mesh design is connected, so there will be no problem of packaging leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are only used to illustrate specific embodiments and are not considered to limit the present invention. In the entire drawings, the same reference symbols represent the same components. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic structural diagram of a convenient food packaging container provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the water filter cover film structure of a convenient food packaging container provided by an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Water filter cover; 101. Water filter cover opening tongue; 2. Water filter cover opening part; 201. Die-cut edge of water filter cover opening part; 202. Die-cut edge of water filter hole; 3. First plastic layer; 4. Paper layer; 5. Second plastic layer; 6. Die-cut buffer layer; 7. Third plastic layer; 8. Aluminum foil layer; 9. Heat-sealed resin layer. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0028] Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention.

[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of methods and systems consistent with some aspects of the present invention as detailed in the appended claims.

[0030] refer to Figure 1-2 A convenient food packaging container of the present embodiment includes a water filter cover 1, a water filter cover opening tongue 101, a water filter cover opening part 2, a water filter cover opening part die-cut edge 201, a water filter hole die-cut edge 202, and the water filter cover 1 is composed of a first plastic layer 3, a paper layer 4, a second plastic layer 5, a die-cut buffer layer 6, a third plastic layer 7, an aluminum foil layer 8, and a heat-sealing resin layer 9 from top to bottom.

[0031] The first plastic layer 3 of this embodiment includes one of PET, BOPP, BOPE, and MDOPE; the paper layer 4 includes one of coated paper and offset paper;

[0032] The second plastic layer 5 includes one of PET and BOPP; the die-cut buffer layer 6 uses co-extruded polyethylene;

[0033] The third plastic layer 7 includes one of PET and BOPP;

[0034] The aluminum foil layer 8 includes one of AL6, 7, 9, 11, and 16 um; the heat-sealing resin layer 9 includes one of polyethylene and EVA.

[0035] The die-cutting buffer layer 6 and the heat-sealing resin layer 9 of this embodiment are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding.

[0036] The die-cutting buffer layer 6 of the present embodiment is specifically composed of 60%-80% low-density polyethylene, 10%-20% linear polyethylene, and 10%-20% EMAA, with a specific ratio of 3-4:1.5:1.5, and has strong elasticity and is suitable for die-cutting buffering.

[0037] The specific production process of the high elasticity cushioning polyethylene material of this embodiment includes the following steps:

[0038] The materials are automatically mixed in the above proportions by a co-extruder;

[0039] Heat to melt the mixed material, the melting temperature is 230℃-270℃;

[0040] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer 5 and the third plastic layer 7, and the thickness of the extruded material is 15um-30um;

[0041] The first plastic layer 3 and the paper layer 4 are printed by a printing press, and the remaining layers are compounded by dry compounding or solvent-free compounding, and after the compounding is completed, they are cured in a curing room;

[0042] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 140um-150um, and the half-cutting depth of the back die-cutting is 58um-65um.

[0043] like Figure 2 As shown, the water filter cover film for a convenient food packaging container of this embodiment is composed of a first plastic layer 3, a paper layer 4, a second plastic layer 5, a die-cut buffer layer 6, a third plastic layer 7, an aluminum foil layer 8 and a heat-sealing resin layer 9.

[0044] A method for preparing a convenient food packaging container comprises the following steps:

[0045] Preparation of water filter cover 1:

[0046] The preparation method of the die-cut buffer layer 6 is as follows: the materials are automatically mixed according to the proportion of the die-cut buffer layer 6 by a co-extruder, and the mixed materials are heated to melt, and the melting temperature is 230° C.-270° C.;

[0047] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer 5 and the third plastic layer 7, and the thickness of the extruded material is 15um-30um;

[0048] The first plastic layer 3 and the paper layer 4 are printed by a printing machine, and the remaining layers are compounded by dry compounding or solvent-free compounding. During compounding, the unwinding tension is controlled at 15-20kg, and the winding tension is controlled at 20-25kg. After compounding, the layers are naturally cured in a curing room for 12-48h.

[0049] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 140um-150um, and the half-cutting depth of the back die-cutting is 58um-65um;

[0050] The die-cut buffer layer 6 and the heat-sealing resin layer 9 are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding to obtain the water filter cover 1;

[0051] Remolding, demoulding, cooling, cutting, molding temperature 140 ℃ -150 ℃, cooling time 20-30S; finally, the packaging container is formed by uncovering part 2.

[0052] Example 1.

[0053] A convenient food packaging container of the present embodiment includes a water filter cover 1, a water filter cover opening tongue 101, a water filter cover opening part 2, a water filter cover opening part die-cut edge 201, a water filter hole die-cut edge 202, and the water filter cover 1 is composed of a first plastic layer 3, a paper layer 4, a second plastic layer 5, a die-cut buffer layer 6, a third plastic layer 7, an aluminum foil layer 8, and a heat-sealing resin layer 9 from top to bottom.

[0054] The first plastic layer 3 of this embodiment includes PET; the paper layer 4 includes coated paper;

[0055] The second plastic layer 5 comprises PET; the die-cut buffer layer 6 comprises co-extruded polyethylene;

[0056] The third plastic layer 7 comprises PET;

[0057] The aluminum foil layer 8 includes AL6; and the heat-sealing resin layer 9 includes polyethylene.

[0058] The die-cutting buffer layer 6 and the heat-sealing resin layer 9 of this embodiment are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding.

[0059] The die-cutting buffer layer 6 of the present embodiment is specifically composed of 60% low-density polyethylene, 10% linear polyethylene, and 10% EMAA, with a specific ratio of 3:1.5:1.5. It has strong elasticity and is suitable for die-cutting buffering.

[0060] The specific production process of the high elasticity cushioning polyethylene material of this embodiment includes the following steps:

[0061] The materials are automatically mixed in the above proportions by a co-extruder;

[0062] Heat to melt the mixed material, the melting temperature is 230°C;

[0063] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer 5 and the third plastic layer 7, and the thickness of the extruded material is 15um;

[0064] The first plastic layer 3 and the paper layer 4 are printed by a printing press, and the remaining layers are compounded by dry compounding or solvent-free compounding, and after the compounding is completed, they are cured in a curing room;

[0065] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 140um, and the half-cutting depth of the back die-cutting is 58um.

[0066] The present embodiment is a water filter cover film for a convenient food packaging container.

[0067] Example 2.

[0068] A convenient food packaging container of the present embodiment includes a water filter cover 1, a water filter cover opening tongue 101, a water filter cover opening part 2, a water filter cover opening part die-cut edge 201, a water filter hole die-cut edge 202, and the water filter cover 1 is composed of a first plastic layer 3, a paper layer 4, a second plastic layer 5, a die-cut buffer layer 6, a third plastic layer 7, an aluminum foil layer 8, and a heat-sealing resin layer 9 from top to bottom.

[0069] The first plastic layer 3 of this embodiment includes BOPP; the paper layer 4 includes offset paper;

[0070] The second plastic layer 5 includes BOPP; the die-cut buffer layer 6 uses co-extruded polyethylene;

[0071] The third plastic layer 7 comprises BOPP;

[0072] The aluminum foil layer 8 includes AL7; and the heat-sealing resin layer 9 includes EVA.

[0073] The die-cutting buffer layer 6 and the heat-sealing resin layer 9 of this embodiment are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding.

[0074] The die-cutting buffer layer 6 of the present embodiment is specifically composed of 80% low-density polyethylene, 20% linear polyethylene, and 20% EMAA, with a specific ratio of 4:1.5:1.5. It has strong elasticity and is suitable for die-cutting buffering.

[0075] The specific production process of the high elasticity cushioning polyethylene material of this embodiment includes the following steps:

[0076] The materials are automatically mixed in the above proportions by a co-extruder;

[0077] Heat to melt the mixed material, the melting temperature is 270°C;

[0078] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer 5 and the third plastic layer 7, and the thickness of the extruded material is 30um;

[0079] The first plastic layer 3 and the paper layer 4 are printed by a printing press, and the remaining layers are compounded by dry compounding or solvent-free compounding, and after the compounding is completed, they are cured in a curing room;

[0080] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 150um, and the half-cutting depth of the back die-cutting is 65um.

[0081] The present embodiment is a water filter cover film for a convenient food packaging container.

[0082] Example 3.

[0083] A convenient food packaging container of the present embodiment includes a water filter cover 1, a water filter cover opening tongue 101, a water filter cover opening part 2, a water filter cover opening part die-cut edge 201, a water filter hole die-cut edge 202, and the water filter cover 1 is composed of a first plastic layer 3, a paper layer 4, a second plastic layer 5, a die-cut buffer layer 6, a third plastic layer 7, an aluminum foil layer 8, and a heat-sealing resin layer 9 from top to bottom.

[0084] The first plastic layer 3 of this embodiment includes PET; the paper layer 4 includes coated paper;

[0085] The second plastic layer 5 comprises PET; the die-cut buffer layer 6 comprises co-extruded polyethylene;

[0086] The third plastic layer 7 comprises BOPP;

[0087] The aluminum foil layer 8 includes AL11; and the heat-sealing resin layer 9 includes EVA.

[0088] The die-cutting buffer layer 6 and the heat-sealing resin layer 9 of this embodiment are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding.

[0089] The die-cutting buffer layer 6 of the present embodiment is specifically composed of 70% low-density polyethylene, 15% linear polyethylene, and 15% EMAA, with a specific ratio of 3.5:1.5:1.5. It has strong elasticity and is suitable for die-cutting buffering.

[0090] The specific production process of the high elasticity cushioning polyethylene material of this embodiment includes the following steps:

[0091] The materials are automatically mixed in the above proportions by a co-extruder;

[0092] Heat to melt the mixed material, the melting temperature is 250°C;

[0093] The mixed material is extruded through the extruder die head, and the extruded material bonds the second plastic layer 5 and the third plastic layer 7, and the thickness of the extruded material is 18 μm;

[0094] The first plastic layer 3 and the paper layer 4 are printed by a printing press, and the remaining layers are compounded by dry compounding or solvent-free compounding, and after the compounding is completed, they are cured in a curing room;

[0095] Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 145um, and the half-cutting depth of the back die-cutting is 60um.

[0096] The present embodiment is a water filter cover film for a convenient food packaging container.

[0097] Table 1

[0098]

[0099] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A convenient food packaging container, characterized in that: The packaging container is composed of a water filter cover (1) and a water filter cover opening part (2); a water filter cover opening tongue (101) is arranged on the upper part of the water filter cover (1); the water filter cover opening part (2) is composed of a water filter cover opening part die-cut edge (201) and a water filter hole die-cut edge (202); and the water filter cover (1) is composed of a first plastic layer (3), a paper layer (4), a second plastic layer (5), a die-cut buffer layer (6), a third plastic layer (7), an aluminum foil layer (8), and a heat-sealing resin layer (9) in order from top to bottom.

2. The instant food packaging container according to claim 1, characterized in that: The first plastic layer (3) comprises one of PET, BOPP, BOPE and MDOPE; the paper layer (4) comprises one of coated paper and offset paper; The second plastic layer (5) comprises one of PET and BOPP; the die-cutting buffer layer (6) uses co-extruded polyethylene; The third plastic layer (7) comprises one of PET and BOPP; The aluminum foil layer (8) includes one of AL6, 7, 9, 11, and 16 um in thickness; the heat-sealing resin layer (9) includes one of polyethylene and EVA.

3. The instant food packaging container according to claim 2, characterized in that: The die-cut buffer layer (6) is specifically composed of 60%-80% low-density polyethylene, 10%-20% linear polyethylene, and 10%-20% EMAA, with a specific ratio of 3-4:1.5:1.

5.

4. A water filter cover film for a convenient food packaging container as claimed in any one of claims 1 to 3, characterized in that: The water filter cover membrane is composed of a first plastic layer (3), a paper layer (4), a second plastic layer (5), a die-cutting buffer layer (6), a third plastic layer (7), an aluminum foil layer (8) and a heat-sealing resin layer (9).

5. A method for preparing the instant food packaging container according to any one of claims 1 to 3, characterized in that: The following steps are included: Preparation of the filter cap (1): The materials are automatically mixed according to the proportion of the die-cut buffer layer (6) by a co-extruder, and the mixed materials are heated to melt at a melting temperature of 230° C. to 270° C.; Mixing the materials through an extruder die head for extrusion, wherein the extruded materials bond the second plastic layer (5) and the third plastic layer (7), and the thickness of the extruded materials is 15um-30um; The first plastic layer (3) and the paper layer (4) are printed using a printing machine, and the remaining layers are laminated using dry lamination or solvent-free lamination. During lamination, the unwinding tension is controlled at 15-20 kg, and the winding tension is controlled at 20-25 kg. After lamination, the layers are naturally cured in a curing room for 12-48 hours. Use a die-cutting machine for die-cutting, the half-cutting depth of the front die-cutting is 140um-150um, and the half-cutting depth of the back die-cutting is 58um-65um; The die-cut buffer layer (6) and the heat-sealing resin layer (9) are produced by laminating and co-extrusion, and the remaining layers are compounded by dry compounding or solvent-free compounding to obtain the water filter cover (1); Remolding, demoulding, cooling, and cutting, the molding temperature is 140°C-150°C, and the cooling time is 20-30S; finally, the packaging container is formed by uncovering the part (2).

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