Paper moisture-proof packaging barrel

Abstract

The utility model discloses a paper damp-proof packaging barrel and belongs to the technical field of packaging containers. Comprising a barrel body and a barrel cover, a barrel body anti-deformation hoop is combined on the outer wall of the upper end of the barrel body around the periphery of the barrel body, and the lower surface of the barrel cover makes contact with the upper surface of the barrel body anti-deformation hoop; a barrel body bottom plate supporting and positioning folded edge is arranged at the bottom of the barrel body in the direction of a barrel body cavity in a folding and unfolding mode, a barrel body bottom plate is supported and positioned on the barrel body bottom plate supporting and positioning folded edge, and a barrel body bottom plate moisture-proof film is combined on the surface of the side, back to the barrel body cavity, of the barrel body bottom plate. The periphery of the barrel body bottom plate damp-proof film extends to the side, back to the barrel body cavity, of the barrel body bottom plate supporting and positioning folded edge. The upper edge of the barrel cover is folded and unfolded to form a barrel cover folding edge, the peripheral edge part of the barrel cover plate is fixed with the downward side of the barrel cover folding edge, the upward side surface of the barrel cover plate is combined with a barrel cover plate moisture-proof film, and the periphery of the barrel cover plate moisture-proof film extends to the upward side surface of the barrel cover folding edge. The stacking requirement of the required layer number is met; moisture invasion is avoided, and raw materials in the barrel body cavity are protected.

Description

Technical Field

[0001] This utility model belongs to the field of packaging container technology, specifically relating to a paper moisture-proof packaging barrel. Background Technology

[0002] For many powdery raw materials with relatively low specific gravity, such as pigments and dyes, they are usually first packed into thin film bags or paper bags, such as PVC bags, and then placed into paper packaging drums. The advantages of using paper packaging drums for secondary packaging are: improving compressive strength, preventing stacking deformation, isolating raw materials from external contamination, achieving lightweight packaging, moisture protection and environmental protection, and allowing the packaging drums to be recycled, etc.

[0003] In recent years, the requirements for paper packaging drums have become increasingly stringent. For example, paper packaging drums used for exported products are required to meet ISTA3A transport tests, ASTM D642 stacking tests, and the EU EN13428 moisture-proof clauses, thus forcing manufacturers to improve the structure of traditional paper packaging drums. Typical examples of so-called traditional paper packaging drums include CN2915695Y (all-paper packaging drum), CN200957921Y (packaging drum), CN207107288U (an environmentally friendly paper packaging drum), CN205186710U (paper packaging drum), and CN222769901U (environmentally friendly paper packaging drum), etc. Beyond the aforementioned drawbacks of paper packaging drums, the following common problems exist: the height of the drum is limited because a taller drum is prone to deformation, thus creating a demanding requirement for secondary packaging with self-standing cylindrical bags. Because the height of self-standing cylindrical bags can reach 70cm or even higher, and if the paper packaging barrels used as secondary packaging are at or above the aforementioned height, they are difficult to withstand stacking in logistics processes such as warehousing and transportation, and are prone to deformation or even collapse; since the lid and bottom of the barrel are easily affected by moisture, there are no effective measures to prevent moisture from entering. Utility Model Content

[0004] The objective of this invention is to provide a paper moisture-proof packaging barrel that helps meet the secondary packaging requirements of self-standing packaging bags, satisfies the requirement of reasonable stacking layers in the logistics process, and effectively prevents external moisture from entering the barrel cavity through the lid and bottom.

[0005] The present invention achieves its objective as follows: a paper moisture-proof packaging barrel includes a barrel body and a barrel lid that fits with the barrel body lid for protecting or removing the protection of the barrel body cavity. The invention is characterized in that a barrel body anti-deformation hoop is attached to the upper outer wall of the barrel body around its perimeter. When the barrel lid is fitted with the barrel body lid, the lower surface of the barrel lid contacts the upper surface of the barrel body anti-deformation hoop. A barrel body bottom plate support and positioning fold is horizontally folded around the bottom of the barrel body, facing the barrel body cavity. A plate is supported and positioned on the support and positioning folded edge of the barrel bottom plate. A barrel bottom plate moisture-proof film is attached to the side surface of the barrel bottom plate opposite to the barrel cavity. The periphery of the barrel bottom plate moisture-proof film extends to the side of the barrel bottom plate support and positioning folded edge opposite to the barrel cavity. A barrel lid folded edge is folded inward around the upper edge of the barrel lid. The periphery of the barrel lid plate is fixed to the downward-facing side of the barrel lid folded edge. A barrel lid plate moisture-proof film is attached to the upward-facing side surface of the barrel lid plate. The periphery of the barrel lid plate moisture-proof film extends to the upward-facing side surface of the barrel lid folded edge.

[0006] In one embodiment of the present invention, a bucket mouth reinforcing folded edge is provided along the upper edge of the bucket body and in the direction of the circumference of the bucket body toward the bucket body cavity, and the cross-sectional shape of the bucket mouth reinforcing folded edge is n-shaped.

[0007] In another embodiment of this utility model, the four edges of the bottom plate of the barrel facing downward and at the position corresponding to the support and positioning fold of the bottom plate of the barrel are fixed by an adhesive layer to the side facing upward of the support and positioning fold of the bottom plate of the barrel; the four edges of the lid of the barrel facing upward and at the position corresponding to the lid fold are fixed by an adhesive layer to the side facing downward of the lid fold.

[0008] In another embodiment of this utility model, the widths of the bottom plate support positioning fold and the lid fold are equal and each is 3-4 cm.

[0009] In another embodiment of this utility model, the material and weight of the moisture-proof film on the bottom plate of the barrel and the moisture-proof film on the lid of the barrel are the same.

[0010] In another embodiment of this utility model, the moisture-proof film on the bottom plate of the barrel and the moisture-proof film on the lid are both kraft paper with a biaxially oriented polypropylene film bonded to the outward-facing surface, and the basis weight of the kraft paper is 160-240 g / m². 2 The basis weight of biaxially oriented polypropylene film is 20-25 g / m³. 2 .

[0011] In a further embodiment of this utility model, the ratio of the width of the anti-deformation hoop of the barrel to the height of the barrel is 1:15-20.

[0012] The technical effects of the solution provided by this utility model are as follows: Because a barrel anti-deformation hoop is integrated around the upper outer wall of the barrel, the corresponding area of ​​the barrel forms a double-layer structure. Furthermore, the contact between the lower surface of the barrel lid and the upper surface of the anti-deformation hoop provides support for the lid. This not only achieves a balance between enhancing the strength of the barrel and rationally selecting the barrel wall thickness, thus promoting economy, but also meets the stacking requirements for the required number of layers in logistics processes such as warehousing and transportation. Because a moisture-proof film is integrated on the bottom plate of the barrel facing downwards, and a moisture-proof film is integrated on the lid plate facing upwards, moisture intrusion is effectively prevented, thus effectively protecting the raw materials inside the barrel cavity. Because it can be recycled, usage costs are reduced. And because it can be used as a good recyclable resource after damage and disposal, it embodies the spirit of a resource-saving and circular economy. Attached Figure Description

[0013] Figure 1 This is a structural diagram of one embodiment of the present invention;

[0014] Figure 2 for Figure 1 Enlarged view of part A;

[0015] Figure 3 for Figure 1 The enlarged view of section B is shown. Detailed Implementation

[0016] Please see Figures 1 to 3The illustration shows a paper barrel 1 and a lid 2 that fits with the barrel 1 to cover or remove the cover of the barrel cavity 11. The feature is that a barrel anti-deformation hoop 12 is attached to the upper outer wall of the barrel 1 around its perimeter using hot melt adhesive or other similar adhesive. When the lid 2 is fitted onto the barrel 1, the lower surface 23 of the lid 2 contacts the upper surface 121 of the barrel anti-deformation hoop 12 (i.e., a sealed fit is formed). A barrel bottom plate support and positioning flange 13 is folded horizontally around the bottom of the barrel 1, facing the barrel cavity 11. 14 is supported and positioned on the support and positioning fold 13 of the barrel bottom plate. A barrel bottom plate moisture-proof film 141 is attached to the side surface of the barrel bottom plate 14 opposite to the barrel cavity 11. The barrel bottom plate moisture-proof film 141 extends to the side of the support and positioning fold 13 of the barrel bottom plate opposite to the barrel cavity 11. A barrel lid fold 21 is folded inward around the upper edge of the barrel lid 2 and around the barrel lid 2. The edges of the barrel lid plate 22 of the barrel lid 2 are fixed to the downward side of the barrel lid fold 21. A barrel lid moisture-proof film 221 is attached to the upward side surface of the barrel lid plate 22. The barrel lid moisture-proof film 221 extends to the upward side surface of the barrel lid fold 21.

[0017] Depend on Figure 1 As shown, a bucket mouth reinforcing folded edge 15 is folded along the upper edge of the aforementioned bucket body 1 and in the direction of the circumference of the bucket body 1 toward the aforementioned bucket body cavity 11. The cross-sectional shape of the bucket mouth reinforcing folded edge 15 is n-shaped.

[0018] The four edges of the bottom plate 14 facing downwards and at the position corresponding to the support and positioning fold 13 of the bottom plate are fixed to the top side of the bottom plate by an adhesive layer such as a hot melt adhesive layer; the four edges of the lid 22 facing upwards and at the position corresponding to the lid fold 21 are fixed to the bottom side of the lid by an adhesive layer such as a hot melt adhesive layer.

[0019] The widths of the aforementioned barrel bottom plate support positioning flange 13 and barrel lid flange 21 are equal and each is 3-4cm. In this embodiment, each is selected as 3.5cm.

[0020] The materials and weights of the aforementioned moisture-proof membrane 141 on the bottom plate of the barrel and the moisture-proof membrane 221 on the lid of the barrel are the same.

[0021] The aforementioned moisture-proof film 141 on the bottom plate of the barrel and the aforementioned moisture-proof film 221 on the lid are both made of kraft paper with a biaxially oriented polypropylene film bonded to the outward-facing surface. The basis weight of the kraft paper is preferably 160-240 g / m². 2 The optimal value is 180-220 g / m³. 2Ideally, it should be 200 g / m 2 In this embodiment, 200 g / m³ is selected. 2 The preferred basis weight of biaxially oriented polypropylene film is 20-25 g / m³. 2 The optimal value is 22 g / m 2 In this embodiment, 22 g / m 2 .

[0022] In this embodiment, the height of the aforementioned barrel 1 is 80cm, and the width of the aforementioned barrel anti-deformation hoop 12 is 4cm, thus confirming that the ratio of the width of the aforementioned barrel anti-deformation hoop 12 to the height of the aforementioned barrel 1 is 1:20. Of course, the height of the barrel 1 can also be 90cm, and the height of the aforementioned barrel anti-deformation hoop 12 can be 6cm, thus confirming that the ratio of the width of the aforementioned barrel anti-deformation hoop 12 to the height of the aforementioned barrel 1 is 1:15. Furthermore, the choice of a ratio of 1:15-20 between the width of the barrel anti-deformation hoop 12 and the height of the barrel 1 was made by the applicant in seeking the optimal balance between the strength of the barrel 1 and the reasonable conservation of materials constituting the barrel 1. Because the area of ​​the barrel 1 corresponding to the barrel anti-deformation hoop 12 essentially constitutes a double-layer structure for the barrel 1, blindly increasing the width of the barrel anti-deformation hoop 12 would result in excessive material consumption and be uneconomical; conversely, it would make the strength of the barrel 1 insufficient to guarantee its stability.

[0023] It is not limited to the method mentioned by the applicant in the background section above, where the raw materials are placed in a self-standing cylindrical bag such as a PVC bag, and then placed inside the barrel cavity 11 and the barrel lid 2 is put on. Of course, sealing tape can also be wrapped around the mating area between the barrel lid 2 and the barrel anti-deformation hoop 12.

[0024] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A paper moisture-proof packaging barrel comprising a barrel body (1) and a barrel cover (2) matched with the barrel body (1) for shielding or unshielding the opening of a barrel cavity (11) of the barrel body (1), characterized in that: A barrel anti-deformation hoop (12) is combined with the outer wall of the upper end of the barrel body (1) around the circumference of the barrel body (1), when the barrel cover (2) is combined with the barrel body (1), the lower surface (23) of the barrel cover (2) contacts the upper surface (121) of the barrel anti-deformation hoop (12); a barrel bottom plate supporting and positioning fold (13) is folded and unfolded in a horizontal state around the circumference of the barrel body (1) towards the barrel cavity (11), the barrel bottom plate (14) of the barrel body (1) is supported and positioned on the barrel bottom plate supporting and positioning fold (13), a barrel bottom plate moisture-proof film (141) is combined with the side surface of the barrel bottom plate (14) facing away from the barrel cavity (11), the circumference of the barrel bottom plate moisture-proof film (141) extends to the side of the barrel bottom plate supporting and positioning fold (13) facing away from the barrel cavity (11); a barrel cover fold (21) is folded and unfolded inwards around the circumference of the barrel cover (2) along the upper edge of the barrel cover (2), the circumferential edge part of the barrel cover plate (22) of the barrel cover (2) is fixed to the side of the barrel cover fold (21) facing downwards, a barrel cover plate moisture-proof film (221) is combined with the side surface of the barrel cover plate (22) facing upwards, the circumference of the barrel cover plate moisture-proof film (221) extends to the side surface of the barrel cover fold (21) facing upwards.

2. The paper moisture barrier pail of claim 1, wherein: A barrel mouth reinforcing fold (15) is folded and unfolded around the circumferential direction of the barrel body (1) towards the barrel cavity (11) along the upper edge of the barrel body (1), the cross-sectional shape of the barrel mouth reinforcing fold (15) is n-shaped.

3. The paper moisture barrier pail of claim 1, wherein: The circumferential edge part of the side of the barrel bottom plate (14) facing downwards and at the position corresponding to the barrel bottom plate supporting and positioning fold (13) is fixed to the side of the barrel bottom plate supporting and positioning fold (13) facing upwards by an adhesive layer; the circumferential edge part of the side of the barrel cover plate (22) facing upwards and at the position corresponding to the barrel cover fold (21) is fixed to the side of the barrel cover fold (21) facing downwards by an adhesive layer.

4. The paper moisture barrier pail of claim 1, wherein: The width of the barrel bottom plate supporting and positioning fold (13) and the barrel cover fold (21) is equal to each other and is 3-4 cm.

5. The paper moisture barrier pail of claim 1, wherein: The materials and gram weight of the barrel bottom plate moisture-proof film (141) and the barrel cover plate moisture-proof film (221) are the same.

6. The paper moisture barrier pail of claim 5, wherein: The barrel bottom plate moisture-proof film (141) and the barrel cover plate moisture-proof film (221) are both kraft paper with a double-stretched polypropylene film combined on the outer side surface, the kraft paper has a gram weight of 160-240 g / m 2 , and the double-stretched polypropylene film has a gram weight of 20-25 g / m 2 .

7. The paper moisture barrier pail of any of claims 1 to 6, wherein: The ratio of the width of the barrel anti-deformation hoop (12) to the height of the barrel body (1) is 1:15-20.

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