CN112429361B - Packaging container and blank therefor - Google Patents
Packaging container and blank therefor Download PDFInfo
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- CN112429361B CN112429361B CN202011295819.7A CN202011295819A CN112429361B CN 112429361 B CN112429361 B CN 112429361B CN 202011295819 A CN202011295819 A CN 202011295819A CN 112429361 B CN112429361 B CN 112429361B
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- packaging container
- base layer
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- sealing
- blank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/0281—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body the tubular body presenting double or multiple walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/0227—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end closures formed by inward folding of flaps and securing them by heat-sealing, by applying adhesive to the flaps or by staples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
Abstract
The invention discloses a packaging container and a blank thereof, comprising: a base layer; the first connecting part and the second connecting part are respectively arranged at the longitudinal edges of two opposite sides of the base layer and are used for overlapping connection so that the base layer forms an annular body, wherein sealing indentations are vertically formed at the transverse edges of two opposite sides of the first connecting part; after the base layer forms the annular body, the seal impression coincides with the longitudinal edge line of the second connection. In the manner, according to the blank of the packaging container, the sealing indentation is arranged on the first connecting part, so that after the blank of the packaging container is formed into the packaging container, the semi-closed seal is formed at the transverse edge of the first connecting part, fine gaps at the overlapped positions of the first connecting part and the second connecting part are reduced, and the sealing performance of the packaging container is improved.
Description
Technical Field
The invention is applied in the technical field of packaging containers, in particular blanks for packaging containers.
Background
Packaged beverages, such as fruit juice, UHT milk, tomato ketchup, etc., are now widespread, packaged and sold in sterile packaging materials. While the most common aseptic packages for liquid or pourable food products are called brick-packs, which are parallelepiped-shaped packages, divided into various sizes according to different volumes. The beverage package can be made by folding, sealing and cutting along the predetermined crease line of the packaging material.
The existing beverage packages are mainly sealed in 2 ways, one way is to add a PP (high polymer polypropylene) longitudinal seal inside a formed package to longitudinally seal the formed package for keeping the tightness of the package. And the other method is that a PP longitudinal seal is not used, and after the packaging material is folded, the two longitudinal edges of the packaging material are directly bonded by using bonding glue.
However, in the above method, the cost is increased to some extent by increasing the design of the PP vertical sealing strip. Instead of using a PP longitudinal seal and directly bonding the two longitudinal edges of the packaging material, the longitudinal edges of the packaging material may not be bonded tightly enough to affect the integrity of the seal of the package over time, and thus the shelf life of the liquid food stored in the package.
Disclosure of Invention
The invention provides a packaging container and a blank thereof, which are used for solving the problem of insufficient sealing performance of the packaging container in the prior art.
In order to solve the above technical problem, the present invention provides a blank for a packaging container, comprising: a base layer; the first connecting part and the second connecting part are respectively arranged at the longitudinal edges of two opposite sides of the base layer and are used for overlapping connection so as to enable the base layer to form an annular body, wherein sealing indentations are vertically formed at the transverse edges of two opposite sides of the first connecting part; after the base layer forms the annular body, the seal impression coincides with the longitudinal edge line of the second connection.
Wherein, a first sealing impression and a second sealing impression which are positioned on the same straight line are formed on the first connecting part; wherein the first sealing impression is perpendicular to and intersects the first transverse edge line of the base layer, and the second sealing impression is perpendicular to and intersects the second transverse edge line of the base layer.
Wherein the length range of the sealing indentation is 0.5-2 cm.
Wherein, the base layer is provided with at least two parallel transverse indentations so as to sequentially divide the base layer into a top end area, a middle area and a bottom area along the longitudinal direction of the base layer.
The base layer is provided with at least four parallel transverse indentations so as to sequentially divide the base layer along the longitudinal direction of the base layer to form a first sealing area, a first turnover area, an end face area, a second turnover area and a second sealing area.
The base layer is also provided with at least four first longitudinal indentations which are parallel to each other, so that the base layer is sequentially divided into a first connecting part, a first side surface, a second side surface, a third side surface, a fourth side surface and a second connecting part along the transverse direction of the base layer.
And a second longitudinal indentation is formed in the middle of the area where the first side surface is overlapped with the first sealing area, the area where the first side surface is overlapped with the second sealing area, the area where the second side surface is overlapped with the first sealing area and the area where the second side surface is overlapped with the second sealing area respectively, and the length of the second longitudinal indentation is the same as the longitudinal length of the first sealing area and the second sealing area.
And two oblique indentations respectively extend from two end points of one side of the first side face, which is close to the center of the base layer, to the center of one side of the base layer, which is far away from the center of the base layer, of the area where the first side face is overlapped with the first turnover area, of the area where the first side face is overlapped with the second turnover area, of the area where the second side face is overlapped with the first turnover area, and of the area where the second side face is overlapped with the second turnover area.
Wherein the width range of the first connecting part and the second connecting part is 0.5-3 cm.
In order to solve the technical problem, the invention provides a packaging container which is prepared from the blank of the packaging container.
The invention has the beneficial effects that: different from the prior art, the blank of the packaging container is formed by the sealing indentation, so that after the blank of the packaging container is formed into an annular body, a semi-closed seal is formed at the longitudinal edge line of the second connecting part, fine gaps at the overlapping position of the first connecting part and the second connecting part are reduced, and the tightness between the first connecting part and the second connecting part on the annular body is improved. And in the subsequent continuous folding process along the blank of the packaging container, the seal of the finally formed packaging container is folded, the integrity of the packaging container is improved to a certain extent, and meanwhile, the impact resistance of the whole packaging container is improved.
Drawings
FIG. 1 is a schematic view of the construction of one embodiment of a blank for a packaging container of the present invention;
FIG. 2 is a schematic view of the construction of an embodiment of the blank of the packaging container of the present invention;
FIG. 3 is a partial schematic view of an embodiment of a blank for a packaging container of this embodiment;
FIG. 4 is a schematic illustration of the preparation of an indentation in a blank of a packaging container;
FIG. 5 is a schematic structural diagram of an embodiment of the packaging container of this embodiment;
fig. 6 is a schematic cross-sectional view of the first sealing region of the present embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a blank of a packaging container according to the present invention.
The blank 10 of the packaging container of the present embodiment comprises a base layer 13, which base layer 13 is provided with a first connecting portion 11 and a second connecting portion 12. The first connecting portion 11 and the second connecting portion 12 are respectively disposed at the longitudinal edges of the two opposite sides of the base layer 13. The longitudinal direction of the present embodiment refers to the Y-axis direction in the schematic diagram, and the transverse direction refers to the X-axis direction in the schematic diagram.
In the present embodiment, two sealing indentations 111 are formed on the first connecting portion 11, the two sealing indentations 111 are disposed on the same straight line, one of the sealing indentations 111 is perpendicular to and intersects with the transverse edge 112 of the first connecting portion 11, and the other sealing indentation 111 is perpendicular to and intersects with the transverse edge 113 of the first connecting portion 11. In other embodiments, the first connecting portion 11 may also have a sealing indentation 111 formed thereon, the sealing indentation 111 being perpendicular to and intersecting both the transverse edge 112 and the transverse edge 113 of the first connecting portion 11, and the sealing indentation 111 having the same length as the longitudinal length of the base layer 13. In various embodiments, the sealing indentation 111 needs to be perpendicular to and intersect with the transverse edges 112 and 113 of the first connection portion 11, and the shape of the sealing indentation 111 is not limited herein.
In a particular application scenario, the blank 10 of the packaging container may be a multilayer structure comprising: a paper layer, heat-sealing plastic layers on two sides of the paper layer and an oxygen barrier layer. The blank 10 of the packaging container needs to be folded and glued to form a three-dimensional packaging container. The blank 10 of the packaging container may be sterilized by a chemical sterilizing agent on a packaging machine, the first connecting portion 11 and the second connecting portion 12 of the blank 10 of the packaging container are connected in an overlapping manner in a closed aseptic environment to form an annular body, the annular body is folded, the liquid food which is aseptically processed is filled, and the annular body is sealed. The chemical sterilizing agent is, for example, a hydrogen peroxide solution or the like.
When the blank 10 forming the packaging container is folded to form an annular body, the sealing crease 111 coincides with the longitudinal edge line 121 of the second connecting portion 12, so that the sealing crease 111 can be recessed at the longitudinal edge line 121 of the second connecting portion 12 to form a semi-closed seal at the longitudinal edge line 121 close to the transverse edge 112 of the first connecting portion 11. This structure reduces the fine gap between the first connecting portion 11 and the second connecting portion 12, thereby improving the sealing performance between the first connecting portion 11 and the second connecting portion 12 on the ring body and further improving the sealing performance of the final product packaging container.
Through the arrangement, the blank of the packaging container of the embodiment can form a semi-closed seal at the longitudinal edge line of the second connecting part after the blank of the packaging container forms the annular body through the formation of the sealing indentation, so that fine gaps at the overlapping positions of the first connecting part and the second connecting part are reduced, and the tightness between the first connecting part and the second connecting part on the annular body is improved. And in the subsequent continuous folding process along the blank of the packaging container, the seal of the finally formed packaging container is folded, the integrity of the packaging container is improved to a certain extent, and meanwhile, the impact resistance of the whole packaging container is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a blank of a packaging container according to the present invention. The longitudinal direction of the present embodiment refers to the Y-axis direction in the schematic diagram, and the transverse direction refers to the X-axis direction in the schematic diagram.
The blank 200 of the packaging container of the present embodiment includes a base layer 20, and a first connecting portion 21, an intermediate portion 24, and a second connecting portion 22 are sequentially disposed on the base layer 20, wherein the first connecting portion 21 and the second connecting portion 22 are used for overlapping connection, so that the base layer 20 forms an annular body. The shape of the base layer 20 may be rectangular or square, which is not limited in this embodiment. The first connection portion 21 and the second connection portion 22 may have the same width, which may range from 0.5 to 3 cm, for example: the width of the metal plate can be 0.5 cm, 1.2 cm, 1.5 cm, 2.3 cm, 3 cm and the like, and the specific width setting can be set according to practical application and is not limited herein.
The base layer 20 is formed with a first transverse impression a, a second transverse impression B, a third transverse impression C and a fourth transverse impression D to partition the base layer 20 in sequence along the longitudinal direction of the base layer 20 to form a first sealing region 201, a first fold-over region 202, an end surface region 203, a second fold-over region 204 and a second sealing region 205. The base layer 20 is further formed with a first longitudinal indentation E, a second longitudinal indentation F, a third longitudinal indentation G, and a fourth longitudinal indentation H to sequentially separate the base layer 20 along the longitudinal direction of the base layer 20 to form a first connection portion 21, a first side surface 241, a second side surface 242, a third side surface 243, a fourth side surface 244, and a second connection portion 22. The middle portion 24 includes a first side 241, a second side 242, a third side 243, and a fourth side 244.
The first transverse indentation a, the second transverse indentation B, the third transverse indentation C and the fourth transverse indentation D do not intersect with longitudinal edge lines (not labeled in the figures) on two opposite sides of the base layer 20, so as to prevent the first transverse indentation a, the second transverse indentation B, the third transverse indentation C and the fourth transverse indentation D from generating gaps at the first connecting portion 21 and the second connecting portion 22 after the blank 200 of the packaging container is folded and sealed, thereby affecting the sealability of the packaging container.
In other embodiments, the base layer may also have two parallel transverse indentations formed thereon to sequentially separate the base layer in the longitudinal direction of the base layer into a top region, a middle region, and a bottom region. The sealing of the packaging container is accomplished by directly gluing the top and bottom areas.
In the present embodiment, a first sealing indentation 211 and a second sealing indentation 212 are formed on the first connecting portion 21, and the first sealing indentation 211 and the second sealing indentation 212 are disposed on a same straight line, wherein one end of the first sealing indentation 211 is perpendicular to and intersects the first transverse edge line 2001 of the base layer 20, and the other end of the first sealing indentation 211 extends toward the lower transverse edge line 2002 of the base layer 20. One end of second sealing impression 212 is perpendicular to and intersects lower transverse edge line 2002 of base layer 20, and the other end of second sealing impression 212 extends toward upper transverse edge line 2001 of base layer 20. Wherein the first sealing indentation 211 and the second sealing indentation 212 have a length in the range of 0.5-2 cm. For example: may be 0.5 cm, 0.8 cm, 1.5 cm or 2 cm, etc., and the specific length setting may be set based on practical application, which is not limited herein. The lengths of the first sealing impression 211 and the second sealing impression 212 may be the same or different, and are not limited herein.
After the base layer 20 is formed into a ring shape, the first connecting portion 21 and the second connecting portion 22 are overlapped and contacted, thereby sealing the side of the packaging container. The first sealing indentation 211 and the second sealing indentation 212 coincide with a longitudinal edge line 221 of the second connecting portion 22, the first connecting portion 21 located at the outer side is in direct contact with the outside air, and the second connecting portion 22 located at the inner side is in direct contact with the object inside the packaging container.
Therefore, the first sealing impression 211 and the second sealing impression 212 can be recessed at the top end and the bottom end of the longitudinal edge line 221 of the second connecting portion 22, so as to form a semi-closed seal at the top end and the bottom end of the longitudinal edge line 221, thereby reducing fine gaps between the first connecting portion 21 and the second connecting portion 22, improving the tightness between the first connecting portion 21 and the second connecting portion 22 on the annular body, and further improving the tightness of the final finished packaging container.
In the blank 200 of the packaging container, a second longitudinal indentation (not labeled) is formed in the middle of the region a where the second side 242 coincides with the first sealing region 201, the region c where the second side 242 coincides with the second sealing region 205, the region b where the fourth side 244 coincides with the first sealing region 201, and the region d where the fourth side 244 coincides with the second sealing region 205, and the length of the second longitudinal indentation is the same as the longitudinal length of the first sealing region 201 and the second sealing region 205. In a particular application scenario, the length of first sealing impression 211 and second sealing impression 212 may be the same as the longitudinal length of first sealing area 201 and second sealing area 205, respectively.
Two oblique indentations respectively extend from two end points of one side of the second side 242, which is close to the center of the base layer 20, to the center of one side of the base layer 20, which is far away from the center of the base layer 20, to an area e, where the second side 242 coincides with the first folded area 202, an area g, where the second side 242 coincides with the second folded area 204, an area f, where the fourth side 244 coincides with the first folded area 202, and an area h, where the fourth side 244 coincides with the second folded area 204.
Taking the area a where the second side 242 overlaps the first sealing area 201 and the area e where the second side 242 overlaps the first folding area 202 as an example for specific description, please refer to fig. 3, and fig. 3 is a schematic partial structure diagram of an embodiment of the blank of the packaging container in this embodiment.
A middle position of the region a where the second side surface 242 coincides with the first seal region 201 is provided with a partial longitudinal indentation a2 in the longitudinal direction, and one end of the partial longitudinal indentation a2 intersects with a midpoint a1 of a lower layer edge line a3 of the region a. An area e where the second side surface 242 coincides with the first folded area 202 is attached to an area a where the second side surface 242 coincides with the first sealing area 201, a first oblique indentation e3 is formed between a first endpoint e1 and a midpoint a1 of one side of the area e close to the center of the base layer 20, and a second oblique indentation e4 is formed between a second endpoint e2 and the midpoint a1 of one side of the area e close to the center of the base layer 20.
The arrangement of the longitudinal indentations and the oblique indentations between the area c and the area g, the area b and the area f, and the area d and the area h is the same as the local longitudinal indentations a2, the first oblique indentations e3, and the second oblique indentations e4 between the area a and the area e, which is not described herein again, specifically please refer to the indentation arrangement of the area a and the area e.
The specific process of folding and pasting the blank 200 of the packaging container to form the finished packaging container in this embodiment is as follows:
the base layer 20 is folded along the first longitudinal indentation E, the second longitudinal indentation F, the third longitudinal indentation G and the fourth longitudinal indentation H to form four side surfaces, and the first connecting portion 21 and the second connecting portion 22 are overlapped and then bonded to form a ring-shaped body in one step. At this time, the first sealing impression 211 on the first connection portion 21 coincides with the longitudinal edge line 221 of the second connection portion 22.
After the annular body is formed, the first sealing areas 201 on the two opposite sides of the annular body are subjected to adhesive sealing along the oblique indentations on the areas e, f, g and h and the local longitudinal indentations on the areas a, b, c and d, and the second sealing areas 205 are also subjected to adhesive sealing, so that the first turnover area 202 and the second turnover area 204 form the top end face and the bottom end face of the annular body respectively. And such that the four diagonal indentations along which the first fold-over area 202 forms two wings and the four diagonal indentations along which the second fold-over area 204 forms two wings. The two flaps in the first folded-over region 202 are respectively adhered to the overlapping regions of the second side face 242 and the fourth side face 244 and the end face region 203, and the two flaps in the second folded-over region 204 are adhered to the bottom end face of the annular body, thereby completing the fold forming of the packaging container. Wherein, in the forming process of the specific packaging container, since the packaging container needs to contain food or liquid, the specific forming steps may be changed from the above-mentioned sequence of steps, but the general folding process is the same as the above-mentioned.
After the blank 200 of the packaging container is formed, the first fold-over area 202 and the second fold-over area 204 form the top plane and the bottom plane of the packaging container, respectively, and the middle portion 24 forms four sides of the packaging container after the packaging formation, including a first side 241, a second side 242, a third side 243, and a fourth side 244. Wherein a division is defined between first side 241 and second side 242 by first longitudinal indentation E; a division is defined between second side 242 and third side 243 by a second longitudinal indentation F; a division is defined between the third 243 and fourth 244 side by a third longitudinal indentation G; a division is defined between the fourth side surface 244 and the second connecting portion 22 by the fourth longitudinal indentation H. Since the first side surface 241 and the first connecting portion 21 are located on the same plane after the blank 200 of the packaging container is formed, no longitudinal indentation is formed between the first side surface 241 and the first connecting portion 21.
After forming the blank 200 of the packaging container, the first sealing area 201 and the second sealing area 205 are used for sealing the top and the bottom of the packaging container in the transverse direction, the first fold-over area 202 and the second fold-over area 204 are used for folding to form the top and the bottom of the packaging container, and the end areas 203 are used for forming the four sides of the packaging container.
Referring to fig. 4, fig. 4 is a schematic view illustrating the formation of indentations in a blank of a packaging container.
The blank 200 of the packaging container of the present embodiment is placed on a creasing machine 40 for the preparation of each crease. Specifically, the female die 42 of the indenter 40 is a fixed platform device, two ends of the female die 42 are planes, and a groove 421 is formed in the middle of the female die. When preparing the indentation, the sub-mold 41 of the indenter 40 is located right above the groove 421 of the master mold 42 and can move up and down along the vertical direction of the two end planes of the master mold 42, and the sub-mold 41 is in a columnar convex structure. The blank 200 of the packaging container is flatly placed on the female die 42, the position, needing to be indented, of the blank 200 of the packaging container is placed between the groove 421 and the columnar protrusion of the sub die 41, in the process that the sub die 41 moves downwards, the blank 200 of the packaging container is firstly contacted with the blank 200 of the packaging container and then continuously pressed to the groove 421 of the female die 42 for a certain depth, the blank moves upwards to the original position, and the blank 200 of the packaging container is indented after being pressed to the groove 421 and rebounded. The position of the indentation can be determined by the relative position between the blank 200 of the packaging container and the sub-die 41, the length and thickness of the indentation are determined by the contact area between the sub-die 41 and the sheet packaging material, and the indentations with different lengths and thicknesses can be pressed out by replacing the sub-die 41 with different sizes.
With the above structure, in the present embodiment, by forming the first sealing indentation and the second sealing indentation, after the blank of the packaging container is formed into the annular body or the packaging container, the top and the bottom of the longitudinal edge line of the second connecting portion are recessed, so that the fine gap at the overlapping position of the first connecting portion and the second connecting portion is reduced, and the sealing performance between the first connecting portion and the second connecting portion on the annular body and the sealing performance between the first sealing area and the second sealing area are improved. So that the shelf life of the food or liquid stored in the packaging container can be improved to a certain extent. And in the subsequent continuous folding process along the blank of the packaging container, the seal of the finally formed packaging container is folded, the integrity of the packaging container is improved to a certain extent, and meanwhile, the impact resistance of the whole packaging container is improved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of the packaging container of the present embodiment.
The packaging container 30 of the present embodiment is a six-sided three-dimensional structure including: a top end surface 31, a bottom end surface 32, and four side surfaces 34. The top end surface 31 of the packaging container 30 is further provided with two wing edges 35, wherein the two wing edges 35 are respectively arranged at the edges of two opposite sides of the top end surface 31 and are attached to two side surfaces 34 of two opposite sides of the top end surface 31.
A first sealing region 311 is further provided on a central region of the top end surface 31, and the first sealing region 311 is formed by adhering base layers of two layers of the packaging container 30, thereby sealing the top end surface 31 of the packaging container 30. First indentation 312 is also provided on first sealing region 311. The first indentation 312 is overlapped with the inner longitudinal edge line 341 of the packaging container 30, so that the top end of the inner longitudinal edge line 341 is recessed, a semi-closed seal is formed between the two base layers of the packaging container 30 at the top end of the packaging container 30, a fine gap between the two base layers of the packaging container 30 at the top end of the packaging container 30 is reduced, the sealing performance between the top ends of the packaging container 30 is improved, and the sealing performance of the packaging container 30 is further improved.
The bottom end face 32 of the packaging container 30 is configured similarly to the top end face 31, and only the folding directions of the wing edges (not shown) on the two opposite sides of the bottom end face 32 are different, and the wing edges on the two opposite sides of the bottom end face 32 are configured to be attached to the bottom end face 32, but not to be attached to the side edges 34.
Referring to fig. 6, fig. 6 is a schematic cross-sectional view of the first sealing region according to the embodiment.
The first sealing region 311 of the present embodiment includes a first connecting portion 321, an intermediate portion 324, and a second connecting portion 322, wherein the first connecting portion 321 and the second connecting portion 322 are folded, overlapped, and attached by the intermediate portion 324. The sealing indentation 312 on the first connecting portion 321 coincides with an edge (not labeled in the figure) of the second connecting portion 322, and the edge of the second connecting portion 322 is recessed, so that a semi-sealed area is formed outside the edge of the second connecting portion 322, an edge gap of the second connecting portion 322 is reduced, and the purpose of improving the sealing performance of the packaging container 30 is achieved.
Through the structure, the sealing indentation of the first connecting part can be formed to be concave at the edge of the second connecting part in the top and the bottom of the packaging container, so that the fine gap at the edge of the second connecting part of the packaging container is reduced, and the sealing performance of the packaging container is improved. So that the shelf life of the food or liquid stored in the packaging container can be improved to a certain extent. And in the subsequent continuous folding process along the blank of the packaging container, the seal of the finally formed packaging container is folded, the integrity of the packaging container is improved to a certain extent, and meanwhile, the impact resistance of the whole packaging container is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A blank for a packaging container, characterized in that the blank for a packaging container comprises:
the base layer is provided with at least four mutually parallel transverse indentations so as to sequentially divide the base layer along the longitudinal direction of the base layer into a first sealing area, a first turnover area, an end surface area, a second turnover area and a second sealing area, wherein the transverse indentations are not intersected with longitudinal edge lines on two opposite sides of the base layer;
the first connecting part and the second connecting part are respectively arranged at the longitudinal edges of two opposite sides of the base layer and are used for overlapping connection so as to enable the base layer to form an annular body, wherein sealing indentations are vertically formed at the transverse edges of two opposite sides of the first connecting part; the sealing impression is perpendicular to and intersected with the transverse edges on two opposite sides of the first connecting part, and the length of the sealing impression is the same as the longitudinal length of the base layer;
and after the base layer forms the annular body, the sealing indentation is superposed with the longitudinal edge line of the second connecting part.
2. A blank for a packaging container as claimed in claim 1, characterized in that the length of the sealing impressions ranges from 0.5 to 2 cm.
3. The blank for a packaging container as claimed in claim 1, wherein the base layer is further formed with at least four first longitudinal indentations parallel to each other to divide the base layer into a first connecting portion, a first side, a second side, a third side, a fourth side and a second connecting portion in sequence in a transverse direction of the base layer.
4. A blank for a packaging container according to claim 1, wherein a second longitudinal indentation is formed in the middle of the area of the first side coinciding with the first sealed area, the area of the first side coinciding with the second sealed area, the area of the second side coinciding with the first sealed area and the area of the second side coinciding with the second sealed area, respectively, the second longitudinal indentation having the same length as the longitudinal length of the first sealed area and the second sealed area.
5. A blank for a packaging container according to claim 1, wherein two oblique indentations extend from two end points of one side of the first side face coinciding with the first fold-over region, from two end points of one side of the second side face coinciding with the second fold-over region to the center of the side away from the center of the base layer, to the center of the other side of the second side face coinciding with the second fold-over region.
6. A blank for a packaging container according to claim 1 wherein the first and second connecting portions have a width in the range of 0.5-3 cm.
7. A packaging container, characterized in that it is produced from a blank of the packaging container according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295819.7A CN112429361B (en) | 2020-11-18 | 2020-11-18 | Packaging container and blank therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295819.7A CN112429361B (en) | 2020-11-18 | 2020-11-18 | Packaging container and blank therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112429361A CN112429361A (en) | 2021-03-02 |
| CN112429361B true CN112429361B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011295819.7A Active CN112429361B (en) | 2020-11-18 | 2020-11-18 | Packaging container and blank therefor |
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| Country | Link |
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| CN (1) | CN112429361B (en) |
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