High-strength paper tube

Abstract

The utility model discloses a high-strength paper tube which comprises a paper tube body, and an inner core layer, a reinforcing layer and an outer protective layer are arranged on the paper tube body. The inner core layer is made of high-strength kraft paper, and the reinforcing layer is made of latticed glass fibers; the outer protective layer is formed by compounding waterproof and moistureproof paper and a plastic film; and a compression-resistant structure is arranged on the paper tube body. The inner core layer of the paper tube adopts high-strength kraft paper as an inner core layer material, and the high-strength kraft paper has high initial strength and can provide basic supporting force for the paper tube; the reinforcing layer is made of latticed glass fibers, the thickness of the reinforcing layer is 1-3 mm, the glass fibers have the characteristics of high strength and high modulus, and the latticed structure can effectively disperse stress in multiple directions; and the compression resistance of the paper tube is further enhanced by the compression resistance structure consisting of an annular compression resistance plate, an arc-shaped plate and a buffer spring piece in the compression resistance structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-strength paper tubes. BACKGROUND

[0002] As a common packaging material, paper tubes are widely used in many industries.

[0003] However, the traditional paper tube has obvious shortcomings in strength and pressure resistance. It is usually made of single or a few layers of paper, and the structure is relatively simple. When subjected to certain pressure or external force impact, it is prone to deformation, rupture and other problems. For example, during transportation and storage, when the paper tube is subjected to stacking pressure, collision or vibration, the tube wall may collapse rapidly, and it cannot effectively protect the packaged items inside. This limitation makes it difficult for traditional paper tubes to meet the needs of some fields that require high strength and stability of packaging materials, such as packaging of precision mechanical parts, winding support of large rolls, etc. SUMMARY

[0004] The main purpose of the utility model is to provide a high-strength paper tube to solve the above technical problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a high-strength paper tube, comprising a paper tube body, an inner core layer, a reinforcing layer and an outer protective layer are provided on the paper tube body; the inner core layer is made of high-strength kraft paper, the reinforcing layer is made of grid-shaped glass fiber; the outer protective layer is composed of waterproof and moisture-proof paper and plastic film; the paper tube body is provided with a compression-resistant structure.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the compression-resistant structure includes an annular compression-resistant plate provided on one side of the inner core layer, one side of the annular compression-resistant plate is provided with a plurality of arc-shaped plates, and a buffer spring piece is provided between adjacent two arc-shaped plates.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the annular compression-resistant plate is embedded with a compression-resistant rod body.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the thickness of the inner core layer is 2-5mm; the surface of the innermost layer of the inner core layer is coated with a nano-silicon dioxide wear-resistant coating.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the thickness of the reinforcing layer is 1-3mm.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the thickness of the outer protective layer is 0.5-1.5mm; the plastic film is a biaxially oriented polypropylene film or a polyethylene film.

[0011] The paper tube inner core layer in the utility model adopts high-strength kraft paper as the inner core layer material, which has high initial strength and can provide basic support for the paper tube; the reinforcing layer is made of a reinforcing layer with a thickness of 1-3 mm and is made of a grid-shaped glass fiber, the glass fiber has the characteristics of high strength and high modulus, and the grid-shaped structure can effectively disperse stress in multiple directions; the compression-resistant structure composed of the annular compression-resistant plate, the arc-shaped plate and the buffer spring further enhances the compression resistance of the paper tube. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is the overall structure schematic view of the utility model;

[0013] Fig. 2 is the structure schematic view of the inner core layer, the reinforcing layer and the outer protective layer on the paper tube body in the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the embodiments will be described clearly and completely in combination with the drawings in the embodiments, however, the following specific embodiments and examples are only for the purpose of illustration, and are not a limitation on the utility model.

[0015] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0016] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0017] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through the indirect connection of intermediate medium, can be the communication or the interaction of two elements of two elements, unless another definite limitation.For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium.Moreover, the first feature "above", "above" and "on" the second feature can be directly above or obliquely above the first feature, or just indicate that the first feature is higher than the second feature in horizontal height.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or just indicate that the first feature is lower than the second feature in horizontal height.

[0019] Referring to the drawings Figs. 1-2 The high-strength paper tube in the embodiment comprises a paper tube body 1, and an inner core layer 5, a reinforcing layer 6 and an outer protective layer 7 are arranged on the paper tube body 1.The inner core layer 5 is made of high-strength kraft paper, and the reinforcing layer 6 is made of grid-shaped glass fiber.The outer protective layer 7 is composed of waterproof and moisture-proof paper and plastic film.The paper tube body 1 is provided with a compression-resistant structure.

[0020] In the embodiment, the inner core layer 5 uses high-strength kraft paper as the inner core layer material, which has high initial strength and can provide basic support for the paper tube.The thickness of the inner core layer is between 2-5 mm, which ensures a certain structural rigidity, so that the paper tube is not easy to deform when bearing small pressure.For example, when packaging some light but shape-requiring articles, the inner core layer can effectively maintain the shape stability of the paper tube.

[0021] In the embodiment, the reinforcing layer 6 made of grid-shaped glass fiber has a thickness of 1-3 mm, and the glass fiber has the characteristics of high strength and high modulus, and the grid-shaped structure can effectively disperse stress in multiple directions.When the paper tube is subjected to external pressure, the reinforcing layer can uniformly transmit the pressure to the inner core layer and the outer protective layer, greatly improving the pressure resistance of the paper tube as a whole.Compared with the traditional paper tube, the paper tube with this structure can bear several times or even higher pressure, and is suitable for packaging heavy articles with high strength requirements for packaging containers, such as precision mechanical parts, metal coils and the like.

[0022] In the embodiment, the anti-pressure structure formed by the annular anti-pressure plate 2, the arc-shaped plate 3 and the buffer spring member 4 further enhances the anti-pressure capability of the paper tube; the annular anti-pressure plate 2 provides the paper tube with overall annular supporting force, which can effectively prevent the paper tube from collapsing when subjected to axial pressure; the combination of the arc-shaped plate 3 and the buffer spring member 4 can play a role in buffering and dispersing stress when the paper tube is subjected to circumferential pressure or uneven pressure; when the paper tube is subjected to collision or extrusion during transportation, the anti-pressure structure can absorb and disperse energy to protect the internal articles of the paper tube from being damaged; the embedded anti-pressure rod body 20 further strengthens the anti-pressure performance of the annular anti-pressure plate 2, so that the annular anti-pressure plate 2 can withstand greater pressure without deforming.

[0023] In the embodiment, the innermost paper surface of the inner core layer 5 is coated with a nano-silica wear-resistant coating, which can significantly improve the wear resistance and scratch resistance of the inner surface of the paper tube. During use of the paper tube, especially when the internal articles are easily scratched or have high cleanliness requirements, the wear-resistant coating can effectively reduce the damage between the articles and the inner wall of the paper tube due to friction, ensuring that the appearance quality and performance of the articles are not affected; at the same time, the service life of the paper tube is also prolonged, and the performance degradation and replacement frequency caused by wear are reduced.

[0024] In the embodiment, the outer protective layer 7 is composed of waterproof and moisture-proof paper and plastic film, and the thickness is between 0.5-1.5mm; the waterproof and moisture-proof paper can effectively block the intrusion of external moisture, preventing the paper tube from being damaged due to moisture, strength reduction, deformation, or even damage; the plastic film (such as biaxially oriented polypropylene film or polyethylene film) not only enhances the waterproof and moisture-proof performance, but also provides additional wear resistance and protection functions; it can protect the paper tube from external dust, dirt and slight mechanical damage, so that the paper tube can maintain good performance in harsher environmental conditions, ensuring reliable protection of the internal articles.

[0025] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-strength paper tube, characterized by: The paper tube body is provided with an inner core layer, a reinforcing layer and an outer protective layer; the inner core layer is made of high-strength kraft paper, the reinforcing layer is made of grid-shaped glass fiber, the outer protective layer is made of waterproof and moisture-proof paper and plastic film, and the paper tube body is provided with a compression-resistant structure.

2. A high strength paper tube according to claim 1, characterized in that: The compression-resistant structure comprises an annular compression-resistant plate arranged on one side of the inner core layer, and a plurality of arc-shaped plates are arranged on one side of the annular compression-resistant plate, and a buffer spring member is arranged between two adjacent arc-shaped plates.

3. A high strength paper tube according to claim 2, characterized in that: The annular compression-resistant plate is embedded with a compression-resistant rod body.

4. A high strength paper tube according to claim 3, characterized in that: The thickness of the inner core layer is 2-5 mm, and the innermost layer of the inner core layer is coated with a nano-silicon dioxide wear-resistant coating.

5. A high strength paper tube according to claim 4, characterized in that: The thickness of the reinforcing layer is 1-3 mm.

6. A high strength paper tube according to claim 5, characterized in that: The thickness of the outer protective layer is 0.5-1.5 mm, and the plastic film is a biaxially oriented polypropylene film or a polyethylene film.

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