Plastic food can capable of being vacuumized and filled with nitrogen

Abstract

The utility model discloses a food plastic can capable of being vacuumized and filled with nitrogen, which comprises a can body, a sealing part arranged at the top of the can body, an easy-to-tear cover and a safety cover, the easy-to-tear cover is arranged at the sealing part, the sealing part is sealed by adopting a double-hemming structure to form a primary sealing structure, and the safety cover is arranged at the sealing part. And the primary sealing structure is subjected to secondary sealing. The easy-to-tear cover covers the sealing part at the can opening of the opened plastic food can, the primary sealing structure is formed by sealing through the double-hemming structure, finally, the safety cover is arranged on the sealing part, the primary sealing structure is subjected to secondary sealing, and iron can sealing equipment and vacuumizing and nitrogen filling equipment can be used for sealing in a hemming sealing mode. Nitrogen filling and micro-negative pressure states in the can can be achieved, meanwhile, the residual oxygen amount in a closed space can be controlled to be lower than 3%, the quality and safety of food are guaranteed, food can be eaten and stored conveniently and rapidly, the packaging can be compatible with existing tinplate can sealing equipment, and the equipment investment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to a food plastic can which can be vacuumed and filled with nitrogen. Background Art

[0002] Powdered and granular foods such as milk powder, rice flour, and instant cereals are rich in nutrients. During the product packaging process, vacuum pumping and nitrogen filling are often required to ensure product quality and safety.

[0003] Common packaging formats on the market often use tinplate cans or composite aluminum foil bags. Tinplate containers are rigid and resist being crushed after vacuuming and nitrogen filling. Their multi-layered crimping provides a tight seal, creating a stable storage space under negative pressure and nitrogen filling. The airtightness of composite aluminum foil bags, on the other hand, is directly dependent on the effectiveness of the seal. Plastic food packaging cans are more difficult to vacuum and nitrogen fill, so they are often used for products like preserved fruits that don't require vacuuming and nitrogen filling.

[0004] Existing food cans consist of a can body, a sealing film, a can lid, and a support ring. Patent CN 218317869 U provides a nitrogen-filled, fresh-keeping tea can. This uses an aluminum foil sealing film to effectively seal the tea leaves inside the can, optimize the plastic can mouth structure, and effectively improve the comfort of holding the can.

[0005] Most of the existing plastic can packaging on the market uses open food plastic cans, heat-sealed sealing films and screw-on caps, without vacuuming or nitrogen filling. Food packaged in this way often has a relatively short shelf life. Considering that large-sized packaged food often takes a long time to be consumed, it may cause waste. Therefore, large-sized packaged milk powder, rice flour, instant cereal products, etc. urgently need to extend the shelf life of large-capacity plastic can products.

[0006] Furthermore, when opening a can of existing products, the screw cap must be opened and the heat-sealed film to be torn. During this process, the can mouth remains fully open, exposing the food to direct air and easily causing contamination and moisture absorption. Furthermore, once the screw cap is removed, its sealing performance may be compromised, affecting the nutritional value and safety of the product. Utility Model Content

[0007] The purpose of the utility model is to provide a food plastic can that can be vacuumed and filled with nitrogen, thereby increasing the barrier and airtightness of the plastic can packaging seal, and realizing nitrogen filling and vacuuming of food plastic can products, thereby ensuring the quality and safety of the product with an appropriate vacuum degree and low residual oxygen content.

[0008] In order to solve the above technical problems, an embodiment of the present invention provides a food plastic can that can be vacuumed and filled with nitrogen, characterized in that it includes a can body, a sealing part arranged on the top of the can body, an easy-tear cover and a safety cover. The easy-tear cover is arranged on the sealing part, and the sealing part is sealed with a double curling structure to form a primary sealing structure. The safety cover is arranged on the sealing part, and performs secondary sealing on the primary sealing structure.

[0009] The capacity of the tank body is 2.2-2.3 L, the height of the tank body is 120-140 mm, and the outer diameter of the tank body is 120-150 mm.

[0010] The easy-tear cover comprises a tin-plated steel sheet with an opening and an aluminum foil easy-tear film which is arranged on the surface of the tin-plated steel sheet and seals the opening.

[0011] Wherein, the shape of the opening is elliptical, rectangular or trapezoidal.

[0012] The safety cover includes a bottom ring, a lock and a flip cover. The bottom ring is engaged with the sealing part. The flip cover opens or closes the outlet of the sealing part by rotating. The lock is used to lock the flip cover and the sealing part after the flip cover closes the outlet of the sealing part.

[0013] The invention also includes a food measuring spoon arranged inside the bottom ring.

[0014] Wherein, at least one tableware is provided with the easy-tear cover surface.

[0015] Wherein, the tableware includes at least one of a spoon and a fork.

[0016] Wherein, the tableware is clamped to the easy-tear cover via a clamping piece, or the tableware is bonded to the easy-tear cover via an adhesive layer.

[0017] The can body also includes a can label arranged on the outer side wall of the can body, and the can label is bonded to the can body.

[0018] The vacuum-evacuable, nitrogen-filled food plastic container provided by the present invention has the following advantages over the prior art:

[0019] The vacuum-filled and nitrogen-filled food plastic can provided by the embodiment of the present invention is formed by covering the sealing portion at the mouth of the open food plastic can with an easy-tear cover, sealing with a double crimping structure to form a primary sealing structure, and finally adopting a safety cover to be arranged on the sealing portion, and performing a secondary sealing on the primary sealing structure. The can sealing equipment and vacuum-filled and nitrogen-filled equipment can be used to perform a hermetic sealing in the form of crimping sealing, which can not only realize the state of nitrogen filling and slight negative pressure in the can, but also the residual oxygen content in the closed space can be controlled to be less than 3%, thereby ensuring the quality and safety of the food, and also convenient and quick to eat and store. The packaging is compatible with the existing tinplate can sealing equipment, thus reducing the equipment investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A structural schematic diagram of an embodiment of a vacuum-evacuable and nitrogen-filled food plastic can in an open state provided by the present invention;

[0022] Figure 2 A schematic diagram of the double-curled structure of the easy-tear lid in one embodiment of the vacuum-evacuable and nitrogen-filled plastic food container provided by the present invention;

[0023] Among them, 1-can body, 2-sealing part, 3-easy-tear cover, 4-safety cover. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Please refer to Figure 1-Figure 2 , Figure 1 A structural schematic diagram of an embodiment of a vacuum-evacuable and nitrogen-filled food plastic can in an open state provided by the present invention; Figure 2 A schematic diagram of the double-rolled edge structure of an easy-tear lid in an embodiment of a vacuum-evacuable and nitrogen-filled plastic food container provided by the present invention.

[0026] In a specific embodiment, the vacuum-evacuable, nitrogen-filled food plastic can comprises a can body 1, a sealing portion 2 arranged on the top of the can body 1, an easy-tear cover 3 and a safety cover 4. The easy-tear cover 3 is arranged on the sealing portion 2, and the sealing portion 2 is sealed with a double curling structure to form a primary sealing structure. The safety cover 4 is arranged on the sealing portion 2, and performs a secondary seal on the primary sealing structure.

[0027] The primary sealing structure is formed by covering the sealing part 2 at the mouth of the open plastic food can with an easy-tear cover 3 and sealing with a double crimping structure. Finally, a safety cover 4 is arranged on the sealing part 2 and the primary sealing structure is sealed for a second time. The iron can sealing equipment and vacuum nitrogen filling equipment can be used to seal the can in a crimping manner. Not only can nitrogen filling and a slightly negative pressure state be achieved in the can, but the residual oxygen content in the enclosed space can be controlled to be less than 3%, thereby ensuring the quality and safety of the food. The packaging is also convenient and quick to eat and store. The packaging is compatible with existing tinplate can sealing equipment, reducing equipment investment costs.

[0028] The shape and size of the tank body 1 are not limited in this application. The capacity of the tank body 1 is 2.2~2.3L, the height of the tank body 1 is 120~140mm, and the outer diameter of the tank body 1 is 120~150mm.

[0029] In one embodiment, the tank body 1 has a capacity of 2.2 L, a height of 140 mm, and an outer diameter of 120 mm.

[0030] The shape of the tank body 1 is a cylinder, a cuboid, an ellipsoid or other shapes.

[0031] In the present application, the easy-tear cover 3 adopts a double-crimped structure for initial sealing, and its structure is not limited. In one embodiment, the easy-tear cover 3 includes a tin-plated steel plate with an opening and an aluminum foil easy-tear film arranged on the surface of the tin-plated steel plate and sealing the opening.

[0032] The present application includes but is not limited to using tinned steel sheets as substrates, and the easy-tear films include but are not limited to aluminum foil easy-tear films. The present application does not limit the thickness of the tinned steel sheets and the aluminum foil easy-tear films.

[0033] The shape, structure and size of the opening are not limited in the present application. The shape of the opening is elliptical, rectangular or trapezoidal, or an opening of other shapes.

[0034] In this application, a safety cover 4 is used for final packaging. In this application, an existing structure can be used, or a structure after the existing safety cover 4 is modified can be used. This application does not limit the structure of the safety cover 4.

[0035] In one embodiment, the safety cover 4 includes a bottom ring, a lock and a flip cover, the bottom ring is snap-connected with the sealing part 2, the flip cover opens or closes the outlet of the sealing part 2 by rotating, and the lock cover is used to lock the flip cover and the sealing part 2 after the flip cover closes the outlet of the sealing part 2.

[0036] Through the structural design of the bottom ring, lock and flip cover, the bottom ring is used to fix the safety cover 4 and seal the connection, the flip cover is used for self-sealing and convenient storage after subsequent material removal, and the safety cover 4 can form a certain seal and protection for the product during subsequent use even if the easy-tear cover 3 is opened, thereby improving the shelf life. The lock structure can ensure the reliability of the packaging of the safety cover 4. After the filling and packaging of the material are completed, the safety cover 4 is ensured to be sealed reliably during transportation and can be sealed again after subsequent use.

[0037] The present application does not limit the locking structure, and either transverse locking or longitudinal locking may be used. Transverse locking is when the flip cover contacts the bottom ring, the locking structure is rotated circumferentially around the can body 1 to achieve locking and opening. Longitudinal locking is when a lock is set at a certain point or area to perform longitudinal locking, or other locking structures may be used.

[0038] In order to further improve the convenience of use, in one embodiment, the vacuum-evacuable and nitrogen-filled plastic food container further includes a food measuring spoon disposed inside the bottom ring.

[0039] By setting a food measuring spoon inside the bottom ring and fixing it by means of snap connection, the user can standardize the material acquisition in subsequent use. For example, for the use of milk powder, the amount used each time can be more standardized and will not be too much or too little. In addition, the user does not need to prepare material collection tools again, and the material will not be contaminated by using self-used tableware, thereby improving the safety of food use.

[0040] This application does not limit the specifications, materials, and installation methods of food measuring spoons.

[0041] In order to further improve the convenience of use, in one embodiment, the vacuum-evacuable and nitrogen-filled plastic food container further includes at least one tableware disposed on the surface of the easy-tear cover 3 .

[0042] By arranging tableware on the surface of the easy-tear cover 3, on the one hand, it can cooperate with the food measuring spoon arranged in the bottom ring, so that no matter whether the material is solid or liquid, it can be taken out in cooperation, and the material obtained is more accurate. On the other hand, the tableware can also be used independently, corresponding to different types of people using the food measuring spoon, thereby improving the flexibility of use.

[0043] This application does not limit the type and size of tableware.

[0044] The tableware includes at least one of a spoon and a fork, or other types of tableware.

[0045] The present application does not limit the installation method of the tableware. The tableware is clamped to the easy-tear cover 3 through a clamping member, or the tableware is bonded to the easy-tear cover 3 through an adhesive layer, or the tableware is first packaged in a packaging bag and then bonded to the easy-tear cover 3.

[0046] In order to further protect the can body 1 and describe the material in the can body 1, in one embodiment, the vacuum-evacuable and nitrogen-filled plastic food can further includes a can label arranged on the outer wall of the can body 1, and the can label is bonded to the can body 1.

[0047] This application does not limit the material, shape, size, installation method, etc. of the can label.

[0048] In one embodiment, the vacuum nitrogen-filled plastic food can comprises a can body 1, a sealing portion 2, an easy-tear cover 3, and a safety cover 4. The can body 1 is used to fill powdered or granular food materials. The can body 1 has a large volume, a capacity of 2.2L, a height of 140mm, and an outer diameter of 150mm. The sealing portion 2 is located at the top of the can body 1 and is characterized by a smooth surface, a smooth parting line without protrusions, and tensile strength and bending strength that meet double hemming requirements. The easy-tear cover 3 is a tin-plated steel sheet (tinplate) with an opening covered with a layer of easy-to-open aluminum foil.

[0049] For different products, the size and shape of the opening of the easy-tear cover 3 can be controlled by changing the size and shape of the punching hole of the tinned steel sheet.

[0050] The safety cover 4 covers the top of the package and includes a lock for closing and a flip cover that can be opened and closed multiple times. The bottom ring can be tightly stuck in the sealing part 2 to further increase the airtightness of the container. The inside of the ring is equipped with a corresponding food measuring spoon.

[0051] When canning, you can use an iron can sealing machine to vacuum, fill with nitrogen and seal the cans.

[0052] During the can sealing process, the plastic can and the metal easy-tear cover 3 are rolled and pressed together to form tightly overlapping curled edges, i.e., a double curled seal is formed. After nitrogen is filled in the can, the residual oxygen content can be controlled to ≤3%.

[0053] After snapping on the cover, the sealing part is sealed by a curling edge and fixed by a 4-ring snap fastener on the safety cover to ensure that the curling edge is firmly sealed.

[0054] When the container is sealed, the lid is closed and the easy-tear cover 3 is sealed, keeping the entire container sealed under a slightly negative nitrogen pressure. To access food, unlock the safety cover 4, remove the food measuring spoon from the ring inside the safety cover 4, peel off the easy-tear film on the easy-tear cover 3, and use the measuring spoon to access the food. When finished, close the flip cover and secure the buckle.

[0055] Compared to existing plastic cans (heat-sealed with screw caps) on the market, this canned product offers consumers superior product quality within the same timeframe before the expiration date due to strict control of the can's vacuum level and residual oxygen. Furthermore, for sellers, this packaging can significantly extend the product's shelf life, reduce time costs associated with distribution, and ultimately increase economic value.

[0056] When the can is packaged, the existing can sealing machine and easy-tear cover 3 of the iron can packaging can be directly used, which can reduce the investment in equipment and packaging materials of the corresponding packaging form and has certain economic benefits.

[0057] When using this can packaging, the white can is pasted with a can label, which is highly flexible. At the same time, the use of packaging mimeograph makes the packaging easy to recycle, environmentally friendly and recyclable.

[0058] To sum up, the vacuum-evacuated and nitrogen-filled food plastic can provided by the embodiment of the present invention is formed by covering the sealing part at the mouth of the open food plastic can with an easy-tear cover, sealing with a double curling structure to form a primary sealing structure, and finally adopting a safety cover to be arranged on the sealing part, and performing a secondary sealing on the primary sealing structure. The iron can sealing equipment and the vacuum-evacuated and nitrogen-filled equipment can be used to perform a sealed sealing in the form of curling sealing, which can not only realize the state of nitrogen filling and slight negative pressure in the can, but also the residual oxygen content in the enclosed space can be controlled to be less than 3%, thereby ensuring the quality and safety of the food, and also convenient and quick to eat and store. The packaging is compatible with the existing tinplate can sealing equipment, reducing the equipment investment cost.

[0059] The above is a detailed introduction to the vacuum-evacuable, nitrogen-filled food plastic container provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be pointed out that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A food plastic can that can be vacuumed and filled with nitrogen, characterized in that: The container comprises a can body, a sealing portion arranged on the top of the can body, an easy-tear cover and a safety cover. The easy-tear cover is arranged on the sealing portion and seals the sealing portion with a double curling structure to form a primary sealing structure. The safety cover is arranged on the sealing portion and performs a secondary seal on the primary sealing structure.

2. The food plastic container capable of vacuuming and nitrogen filling as claimed in claim 1, characterized in that: The capacity of the tank body is 2.2-2.3 L, the height of the tank body is 120-140 mm, and the outer diameter of the tank body is 120-150 mm.

3. The food plastic container capable of vacuuming and nitrogen filling as claimed in claim 1, characterized in that: The easy-tear cover comprises a tin-plated steel sheet with an opening and an aluminum foil easy-tear film which is arranged on the surface of the tin-plated steel sheet and seals the opening.

4. The vacuum-evacuated, nitrogen-filled plastic food container according to claim 3, wherein: The shape of the opening is oval, rectangular or trapezoidal.

5. The food plastic container capable of vacuuming and nitrogen filling as claimed in claim 1, characterized in that: The safety cover includes a bottom ring, a lock and a flip cover. The bottom ring is engaged with the sealing part. The flip cover opens or closes the outlet of the sealing part by rotating. The lock is used to lock the flip cover and the sealing part after the flip cover closes the outlet of the sealing part.

6. The vacuum-evacuable and nitrogen-filled plastic food container according to claim 5, characterized in that: Also included is a food measuring spoon disposed inside the bottom ring.

7. The vacuum-evacuable, nitrogen-filled plastic food container according to claim 6, wherein: Also included is at least one tableware on which the easy-tear cover surface is disposed.

8. The vacuum-evacuable, nitrogen-filled plastic food container according to claim 7, wherein: The tableware includes at least one of a spoon and a fork.

9. The vacuum-evacuable, nitrogen-filled plastic food container according to claim 8, wherein: The tableware is clamped to the easy-tear cover via a clamping piece, or the tableware is bonded to the easy-tear cover via an adhesive layer.

10. The food plastic container capable of vacuuming and nitrogen filling as claimed in claim 1, characterized in that: The can also includes a can label arranged on the outer side wall of the can body, and the can label is bonded to the can body.

Images