A multi-layered composite high-strength lightweight paper tube

Abstract

This invention discloses a multi-layer composite high-strength lightweight paper tube, relating to the field of paper tube processing technology. It includes a paper tube body, a lightweight inner core layer, and a wear-resistant protective layer. The paper tube body comprises a lightweight inner core layer, a staggered composite reinforcement layer, a lattice buffer support layer, and the wear-resistant protective layer. By employing a cross-ribbed staggered composite reinforcement layer, this invention can disperse stress in multiple directions, effectively solving the problems of paper tube delamination, cracking, and bulging deformation under pressure, significantly improving its compressive strength, bending resistance, and torsional resistance. Simultaneously, it is combined with a lattice buffer support layer and interlaced flexible buffer ribs, replacing the traditional weight-increasing reinforcement structure. Relying on the rigid pressure bearing of the support protrusions and the combination of the hollowed-out gaps and the flexible stress relief of the ribs, it improves structural stability without increasing the paper tube wall thickness and weight, effectively balancing high strength and lightweight, and significantly improving material utilization.

Description

Technical Field

[0001] This invention relates to the field of paper tube processing technology, specifically to a multi-layer composite high-strength lightweight paper tube. Background Technology

[0002] Currently, multi-layer composite paper tubes are widely used in many fields such as textile rolls, film rolls, packaging supports, and industrial consumables due to their advantages of being lightweight, environmentally friendly, low-cost, and recyclable. They are a core environmentally friendly consumable that replaces plastic and metal tubes. Most mainstream paper tubes on the market adopt a multi-layer paper coaxial winding composite structure. By bonding and stacking different functional papers in the inner, middle, and outer layers, the paper tube is basically formed and used. Some improved products will add a fiber reinforcement layer, a waterproof and wear-resistant outer layer, or annular reinforcing ribs to slightly improve the compressive strength and wear resistance of the paper tube. They can meet the winding and support requirements under normal low-pressure and light-load conditions. With their simple structure and convenient processing, they have become a basic accessory used in large quantities in industrial production.

[0003] However, in practical applications, existing multi-layer composite paper tubes use the same spiral winding or flat winding method for each layer of paper, resulting in consistent interlayer texture. Under stress, stress is concentrated in the same texture gap, limiting axial compressive strength and radial bending resistance. Under stress, delamination, bulging, cracking, and deformation are prone to occur, significantly shortening the service life under high-intensity conditions. Furthermore, existing reinforcement structures are mostly integral fiber layers or through-hole ring rib structures. To improve strength, the paper thickness or reinforcement layer thickness can only be increased, leading to a significant increase in the overall weight of the paper tube. This fails to meet the requirements of lightweight and high strength. At the same time, the bonding surface between conventional paper tube layers is planar, with limited bonding contact area and no buffering structure. Under impact and extrusion loads, stress cannot be dispersed, and local stress can easily cause overall deformation, resulting in poor stability. In addition, the reinforcement method of thick and thin layers leads to material waste and poor lightweight effect, making it insufficient for high-precision roll materials and high-load support scenarios. Therefore, we propose a multi-layer composite high-strength lightweight paper tube. Summary of the Invention

[0004] In view of the problems existing in the current multi-layer composite high-strength lightweight paper tubes, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a multi-layer composite high-strength lightweight paper tube, which solves the problems of stress concentration between paper tube layers, inability to balance strength and lightweight, easy deformation under stress, and low material utilization in the prior art. Through a novel staggered composite and dot matrix buffer support structure, the overall strength and structural stability of the paper tube are greatly improved without increasing the overall wall thickness or weight. The structure is simple, easy to process, and suitable for a variety of high-load lightweight application scenarios.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multi-layer composite high-strength lightweight paper tube includes a paper tube body, a lightweight inner core layer, and a wear-resistant protective layer. The paper tube body includes a lightweight inner core layer, a staggered composite reinforcement layer, a lattice buffer support layer, and a wear-resistant protective layer. The staggered composite reinforcement layer is disposed on the outer surface of the lightweight inner core layer, the lattice buffer support layer is disposed on the surface of the staggered composite reinforcement layer, and the wear-resistant protective layer is disposed on the surface of the lattice buffer support layer. The lightweight inner core layer, the staggered composite reinforcement layer, the lattice buffer support layer, and the wear-resistant protective layer are all bonded together with an environmentally friendly adhesive. The staggered composite reinforcement layer includes multiple twill high-strength kraft paper layers, and the winding inclination angles of the multiple twill high-strength kraft paper layers are arranged to intersect each other.

[0007] Preferably, paper-reinforced sealing rings are fixedly installed on both sides of the paper tube body, and both paper-reinforced sealing rings are high-density hard paper pressing rings.

[0008] Preferably, the paper tube body has a hollow pressure relief inner hole inside, and the hollow pressure relief inner hole has a gradually changing structure that is thicker in the middle and thinner at both ends.

[0009] Preferably, the dot matrix buffer support layer includes multiple paper support protrusions, which are uniformly fixedly installed on the surface of the misaligned composite reinforcement layer, and force-relieving gaps are provided between the multiple paper support protrusions.

[0010] Preferably, the dot matrix buffer support layer is uniformly embedded with a plurality of flexible buffer ribs, all of which are paper elastic ribs, and the plurality of flexible buffer ribs are arranged alternately with the support protrusions.

[0011] Preferably, the surface of the wear-resistant protective layer is provided with an anti-slip and wear-resistant coating, and the wear-resistant protective layer is a waterproof and wear-resistant coated paper layer.

[0012] Preferably, the lightweight inner core layer is a low-density lightweight yarn tube paper roll.

[0013] Preferably, the two ends of the plurality of flexible buffer ribs are respectively attached to the outer wall of the misaligned composite reinforcement layer and the inner wall of the wear-resistant protective layer.

[0014] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention, by employing a cross-ribbed staggered composite reinforcement layer, can disperse stress in multiple directions, effectively solving the problems of delamination, cracking, bulging and deformation of paper tubes under pressure, and significantly improving the resistance to compression, bending and torsion. At the same time, it is combined with a dot matrix buffer support layer and staggered flexible buffer ribs to replace the traditional weight-adding reinforcement structure. Relying on the rigid pressure bearing of the support protrusions, the combination of the hollow space gaps and the flexible stress relief of the ribs, the structural stability is improved without increasing the wall thickness and weight of the paper tube, effectively balancing high strength and lightweight, and significantly improving the material utilization rate.

[0015] 2. This invention further optimizes the overall performance of the paper tube by adding a gradually changing hollow pressure relief inner hole and end paper reinforcement sealing rings. It overcomes the shortcomings of traditional paper tubes, such as easy deformation, easy damage to the ends, and poor durability. The gradually changing hollow pressure relief inner hole can adaptively release the concentrated stress inside the tube wall, balance the overall pressure distribution, and prevent the middle of the paper tube from bulging and the ends from shrinking and deforming. This ensures the structural stability of the paper tube under high load and long-term operation. At the same time, the high-density reinforcement sealing rings embedded at both ends can seal the gaps between layers, effectively preventing the ends from warping, chipping, and delamination wear, which greatly improves the reusability and durability of the paper tube. With the layered functional design, the inner layer ensures lightweight and precision, while the outer layer provides wear-resistant, anti-slip, and waterproof protection. The overall structure is simple, compatible with existing production equipment, and has low production costs. It can be adapted to both conventional working conditions and high-end precision, high-load operation scenarios, and has a wide range of applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional structural diagram of the paper tube body of the present invention; Figure 3 This is a schematic cross-sectional view of the main body of the paper tube of the present invention; Figure 4 This is a schematic diagram of the overall structure of the hollow pressure relief inner hole of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Paper tube body; 2. Lightweight inner core layer; 3. Wear-resistant protective layer; 4. Staggered composite reinforcement layer; 5. Dot matrix buffer support layer; 6. Twill high-strength kraft paper layer; 7. Paper-reinforced sealing ring; 8. Hollow pressure relief inner hole; 9. Paper support protrusions; 10. Force relief gap; 11. Flexible buffer rib; 12. Anti-slip and wear-resistant coating. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This invention discloses a multilayer composite high-strength lightweight paper tube.

[0021] Example 1 This invention provides, for example Figure 1-4The illustration shows a multi-layer composite high-strength lightweight paper tube, comprising a paper tube body 1, a lightweight inner core layer 2, and a wear-resistant protective layer 3. The paper tube body 1 includes a lightweight inner core layer 2, a staggered composite reinforcement layer 4, a lattice buffer support layer 5, and the wear-resistant protective layer 3. The staggered composite reinforcement layer 4 is disposed on the outer surface of the lightweight inner core layer 2, and the lattice buffer support layer 5 is disposed on the surface of the staggered composite reinforcement layer 4. The wear-resistant protective layer 3 is disposed on the surface of the lattice buffer support layer 5. The reinforcing layer 4, the dot matrix buffer support layer 5, and the wear-resistant protective layer 3 are all bonded with environmentally friendly adhesive. The staggered composite reinforcing layer 4 includes multiple twill high-strength kraft paper layers 6, and the winding tilt angles of the multiple twill high-strength kraft paper layers 6 are arranged to cross each other. The paper tube as a whole adopts a four-layer functional structure to be bonded and cured in one piece. The basic structure from the inside to the outside consists of a lightweight inner core layer 2, a staggered composite reinforcing layer 4, a dot matrix buffer support layer 5, and a wear-resistant protective layer 3. Stable operation is achieved by relying on the multi-layer structure to synergistically bear load and relieve stress in stages.

[0022] Example 2 The present invention is as follows Figure 1 and Figure 4 The illustration shows a multi-layer composite high-strength lightweight paper tube, wherein paper-reinforced sealing rings 7 are fixedly installed on both sides of the paper tube body 1, and both of the paper-reinforced sealing rings 7 are high-density hard paper pressed rings.

[0023] The present invention is as follows Figure 4 The present invention relates to a multi-layer composite high-strength lightweight paper tube, wherein the paper tube body 1 is provided with a hollow pressure relief inner hole 8, and the hollow pressure relief inner hole 8 has a gradually changing structure that is thicker in the middle and thinner at both ends.

[0024] The paper tube has a gradually changing hollow pressure relief 8-hole inner hole that forms an adaptive stress relief channel. During the process of the paper tube being wound with material and continuously subjected to external pressure, the gradually changing inner cavity, which is larger in the middle and smaller at both ends, can balance the pressure on each area of ​​the tube wall, release the residual stress accumulated inside the tube wall, and prevent the paper tube from expanding under pressure in the middle and shrinking and deforming at both ends, thus ensuring the overall roundness and structural stability of the paper tube.

[0025] The paper-reinforced sealing rings 7 at both ends of the paper tube provide overall locking and reinforcement to the ports of the multi-layer paper body. During operation, they can effectively resist end friction, impact and wear, and limit the occurrence of interlayer separation, warping and edge breakage at the ports of the multi-layer paper body, thus maintaining the integrity and regularity of the overall structure of the paper tube.

[0026] Example 3 The present invention is as follows Figure 3 and Figure 4 The multilayer composite high-strength lightweight paper tube shown has a dot matrix buffer support layer 5 comprising a plurality of paper support protrusions 9, which are uniformly fixedly installed on the surface of the misaligned composite reinforcement layer 4, and a force-relieving gap 10 is provided between the plurality of paper support protrusions 9.

[0027] The present invention is as follows Figure 3 The multi-layer composite high-strength lightweight paper tube shown has a plurality of flexible buffer ribs 11 uniformly embedded inside the dot matrix buffer support layer 5. The plurality of flexible buffer ribs 11 are all paper elastic ribs, and the plurality of flexible buffer ribs 11 are arranged alternately with the support protrusions.

[0028] The present invention is as follows Figure 3 The multi-layer composite high-strength lightweight paper tube shown has multiple flexible buffer ribs 11 with their two ends respectively attached to the outer wall of the staggered composite reinforcement layer 4 and the inner wall of the wear-resistant protective layer 3.

[0029] The dot matrix buffer support layer 5 and the flexible buffer ribs 11 form a three-dimensional buffer and stress relief system. During operation, the external load borne by the outer wear-resistant protective layer 3 can be stably transferred to the inner reinforcing structure through the evenly distributed paper support protrusions 9, ensuring the rigidity of the support. At the same time, the stress relief gap 10 between adjacent paper support protrusions 9 reserves deformation buffer space. Combined with the axial flexible buffer ribs 11 arranged in a staggered manner with the protrusions, it can effectively absorb and buffer instantaneous impact loads and bending stresses, avoid bulging and collapse caused by excessive local pressure, and achieve a combination of rigid support and flexible buffering, improving the deformation resistance without increasing the weight.

[0030] The present invention is as follows Figure 3 and Figure 4 The invention relates to a multi-layer composite high-strength lightweight paper tube. The wear-resistant protective layer 3 has an anti-slip and wear-resistant coating 12 on its surface. The wear-resistant protective layer 3 is a waterproof and wear-resistant coated paper layer. The outer wear-resistant protective layer 3, together with the surface anti-slip and wear-resistant coating 12, can resist external friction and water vapor erosion, improve the wear resistance and anti-slip properties of the outer wall of the paper tube, ensure the smooth winding process of the roll material, and extend the service life of the paper tube.

[0031] The present invention is as follows Figure 3 and Figure 4 The invention relates to a multi-layer composite high-strength lightweight paper tube, wherein the lightweight inner core layer 2 is a low-density lightweight yarn tube paper roll. The lightweight inner core layer 2, composed of low-density lightweight yarn tube paper, serves as a basic support matrix, ensuring the overall lightweight of the paper tube while maintaining the smoothness of the inner wall and meeting the assembly precision requirements for stable winding of the roll material.

[0032] In summary, this invention, through the synergistic effect of multi-layered structural graded load bearing, multi-dimensional stress dispersion and buffering, and end reinforcement and protection, completely solves the problems of low strength, easy deformation, weight imbalance, and poor durability of traditional paper tubes, and achieves the effect of lightweight, high strength, high stability, and high durability.

[0033] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-layer composite high-strength lightweight paper tube, comprising a paper tube body (1), a lightweight inner core layer (2), and a wear-resistant protective layer (3), characterized in that, The paper tube body (1) includes a lightweight inner core layer (2), a staggered composite reinforcement layer (4), a dot matrix buffer support layer (5), and a wear-resistant protective layer (3). The staggered composite reinforcement layer (4) is disposed on the outer surface of the lightweight inner core layer (2), the dot matrix buffer support layer (5) is disposed on the surface of the staggered composite reinforcement layer (4), and the wear-resistant protective layer (3) is disposed on the surface of the dot matrix buffer support layer (5). The lightweight inner core layer (2), the staggered composite reinforcement layer (4), the dot matrix buffer support layer (5), and the wear-resistant protective layer (3) are all bonded together with environmentally friendly adhesive. The staggered composite reinforcement layer (4) includes multiple twill high-strength kraft paper layers (6), and the winding tilt angles of the multiple twill high-strength kraft paper layers (6) are arranged to cross each other.

2. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, Both sides of the paper tube body (1) are fixedly installed with paper-reinforced sealing rings (7), and both paper-reinforced sealing rings (7) are high-density hard paper pressing rings.

3. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, The paper tube body (1) has a hollow pressure relief inner hole (8) inside, which is a gradually changing structure with a thicker middle and a thinner end.

4. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, The dot matrix buffer support layer (5) includes multiple paper support protrusions (9), which are uniformly fixed on the surface of the misaligned composite reinforcement layer (4), and a force relief gap (10) is provided between the multiple paper support protrusions (9).

5. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, The dot matrix buffer support layer (5) is uniformly embedded with a plurality of flexible buffer ribs (11), all of which are paper elastic ribs, and the plurality of flexible buffer ribs (11) are arranged alternately with the support protrusions.

6. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, The surface of the wear-resistant protective layer (3) is provided with an anti-slip and wear-resistant coating (12), and the wear-resistant protective layer (3) is a waterproof and wear-resistant coated paper layer.

7. The multi-layer composite high-strength lightweight paper tube according to claim 1, characterized in that, The lightweight inner core layer (2) is a low-density lightweight yarn tube paper roll.

8. The multi-layer composite high-strength lightweight paper tube according to claim 5, characterized in that, The two ends of the multiple flexible buffer ribs (11) are respectively attached to the outer wall of the misaligned composite reinforcement layer (4) and the inner wall of the wear-resistant protective layer (3).

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