Seamless foam pipe

Abstract

The utility model relates to a seamless foam tube, which belongs to the technical field of foam tubes, and comprises a paper tube, a sticking strip is arranged on the outer side of the paper tube, an EVA outer tube is stuck and sleeved on the outer side of the paper tube through the sticking strip, and an easy-to-tear strip which is not stuck with the outer side of the paper tube is arranged at one end of the sticking strip and is positioned on the outer side of the end part of the EVA outer tube. According to the seamless foam tube, the EVA outer tube and the paper tube can be easily fixed and separated, meanwhile, the bearing capacity of the whole structure of the seamless foam tube spliced again can be prevented from being changed as much as possible, and the risk of deformation and damage is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of foam tubes, and in particular to a seamless foam tube. Background Art

[0002] Seamless foam tubes with an EVA outer tube are commonly used for winding paper, film, fabric, and other materials. The EVA outer tube protects the material from damage during the winding process. However, existing seamless foam tubes often experience damage to either the paper tube or the EVA outer tube during use. Damage severely impacts the protective properties and load-bearing capacity of the seamless foam tube, rendering it unusable and resulting in a waste of resources.

[0003] Currently, a prior art document, CN212222026U, discloses an EVA seamless foam cushioning roll core for film winding, which has the following features: an EVA foam cushioning outer tube is placed over an inner tube, so that a locking block on the inner wall of the EVA foam cushioning outer tube moves vertically along a sliding groove on the outer wall of the inner tube. The locking block is then rotated circumferentially, allowing the locking block to enter the locking groove on the outer wall of the inner tube. A fixing block is then installed into the fixing groove and fixed to the inner tube with screws, allowing normal film winding. If either the inner tube or the EVA foam cushioning outer tube is damaged, simply remove the screws to separate the fixing block from the inner tube. The EVA foam cushioning outer tube is then rotated in the opposite direction. Once the locking block enters the sliding groove, the EVA foam cushioning outer tube is pulled vertically upward to separate the inner tube and the EVA foam cushioning outer tube, thereby preventing deformation or damage to the inner tube and the EVA foam cushioning outer tube after separation.

[0004] However, the disadvantages of the prior art are that the card box groove opened on the outer wall of the inner tube destroys the structure of the inner tube, making the inner tube more easily deformed, the bearing capacity weakened, and the overall structure more susceptible to deformation damage. Utility Model Content

[0005] In order to address the shortcomings of the existing technology, the present application provides a seamless foam tube that can easily fix the EVA outer tube and the paper tube and easily separate the EVA outer tube and the paper tube. At the same time, it can minimize changes in the bearing capacity of the overall structure of the re-spliced seamless foam tube and reduce the risk of deformation and damage.

[0006] The present application provides a seamless foam tube adopting the following technical solution:

[0007] A seamless foam tube comprises a paper tube, an adhesive strip is provided on the outside of the paper tube, an EVA outer tube is adhered to the outside of the paper tube through the adhesive strip, and an easy-tear strip that is not adhered to the outside of the paper tube is provided on the outside of one end of the adhesive strip located at the end of the EVA outer tube.

[0008] By adopting the above technical solution, the EVA outer tube is directly fixed to the outside of the paper tube by means of the adhesive strip, and when one of the EVA outer tube or the paper tube is deformed or damaged, the easy-tear strip is torn toward the EVA outer tube, and the adhesive strip connected to the easy-tear strip is lifted up together, thereby lifting up the end edge of the EVA outer tube and taking it away from the paper tube together with the adhesive strip, making it easier to disassemble it from the paper tube so as to reuse the undamaged EVA outer tube or paper tube; the adhesive strip is located on the outer side of the paper tube, and the EVA outer tube and the paper tube are separated without destroying the structure of the paper tube, thereby maintaining the integrity of the structure of the paper tube to be reused, thereby minimizing changes in the bearing capacity of the overall structure of the re-spliced seamless foam tube and reducing the risk of deformation and damage.

[0009] The present application further provides: a baffle is provided on the outside of the end of the adhesive strip located at the EVA outer tube, the baffle is adhered to the outside of the paper tube, the baffle is connected to the tear strip on the outside of the end away from the EVA outer tube, and the length of the end of the baffle abutting the EVA outer tube is greater than the length of the end of the tear strip close to the EVA outer tube.

[0010] By adopting the above technical solution, the retaining bar can limit the EVA outer tube from being placed in the preset position of the paper tube, and when the EVA outer tube is disassembled and the easy-tear strip is torn toward the EVA outer tube, the retaining bar can increase the contact area between the easy-tear strip and the EVA outer tube, making the end of the EVA outer tube easier to be lifted.

[0011] The present application further provides that: a tear strip is adhered to the side of the adhesive strip facing away from the outer side of the paper tube, and the end of the tear strip close to the easy-tear strip abuts against the side of the blocking strip facing away from the easy-tear strip.

[0012] By adopting the above technical solution, the tear strip can protect the adhesive surface of the adhesive strip when the EVA outer tube has not yet been put on the EVA outer tube, reduce the dirt on the adhesive surface of the adhesive strip, and maintain the stickiness of the adhesive strip; the tear strip is cut off when it is torn to the barrier strip, so that the end of the EVA outer tube is flush with the adhesive strip inside the tear strip, and the adhesive effect is better.

[0013] The present application further provides that: a protective strip having the same shape as the adhesive strip is provided on the outside of the paper tube, the adhesive strip and the inner side of the baffle strip are adhered to the side of the protective strip facing away from the outside of the paper tube, and the side of the easy-tear strip close to the outside of the paper tube is not adhered to the protective strip.

[0014] By adopting the above technical solution, when the adhesive strip is lifted up along with the tear strip, the protective strip can protect the outer surface of the paper tube from being damaged by the glue of the adhesive strip, thereby maintaining the structural integrity of the paper tube and reducing the risk of changes in the bearing capacity of the overall structure of the re-spliced seamless foam tube.

[0015] The present application further provides that: the extension direction of the adhesive strip is consistent with the extension direction of the EVA outer tube and the paper tube.

[0016] By adopting the above technical solution, when the adhesive strip is lifted and torn along the extension direction of the paper tube, it is easier to operate, and at the same time, the EVA outer tube can be more smoothly pulled away from the paper tube by the adhesive strip.

[0017] The present application further provides that: a plurality of adhesive strips are provided, and the plurality of adhesive strips are distributed at intervals around the outside of the paper tube.

[0018] By adopting the above technical solution, the plurality of adhesive strips can not only fix the EVA outer tube more stably on the outside of the paper tube, but also operate the plurality of adhesive strips at one time and tear them from multiple positions on the end of the EVA outer tube, making it easier to remove the EVA outer tube from the paper tube.

[0019] The present application further provides that: the end of the EVA outer tube away from the easy-tear strip is flush with the end of the adhesive strip away from the easy-tear strip.

[0020] By adopting the above technical solution, the adhesive strip allows the two ends of the EVA outer tube to be firmly adhered to the outside of the paper tube. When the EVA outer tube is removed without using the tear strip, the EVA outer tube is difficult to fall off from the outside of the paper tube.

[0021] The present application further provides that: the length of the paper tube is greater than the length of the EVA outer tube.

[0022] By adopting the above technical solution, during the winding process of the material, the exposed parts at both ends of the paper roll are convenient for fixing, marking or other processing of the roll.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. The EVA outer tube in the present application is directly fixed to the outside of the paper tube by an adhesive strip. When one of the EVA outer tube or the paper tube is deformed or damaged, the tear strip can be torn toward the EVA outer tube, so that the end edge of the EVA outer tube is lifted up at the same time and separated from the paper tube together with the adhesive strip, thereby realizing the removal of the EVA outer tube from the paper tube, facilitating the secondary use of the EVA outer tube or the paper tube.

[0025] 2. The adhesive strip in this application is set on the outer side of the paper tube. When the EVA outer tube is disassembled, the structure of the paper tube can remain intact, thereby minimizing the change in the bearing capacity of the overall structure of the re-spliced seamless foam tube and reducing the risk of deformation and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of this application.

[0027] Figure 2 It is a schematic diagram of the connection structure of the adhesive strip in this application.

[0028] Figure 3It is a structural diagram of the paper tube in this application.

[0029] Figure 4 This application Figure 1 Schematic diagram of the locally enlarged structure of A in the middle.

[0030] Figure numerals: 1, paper tube; 2, adhesive strip; 3, EVA outer tube; 4, easy-tear strip; 5, barrier strip; 6, tear strip; 7, protective strip. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 4 This application is described in further detail.

[0032] refer to Figures 1 to 3 In this embodiment, a seamless foam tube includes a paper tube 1, an adhesive strip 2 is adhered to the outside of the paper tube 1, an EVA outer tube 3 is adhered to the outside of the paper tube 1 through the adhesive strip 2, one end of the adhesive strip 2 is located on the outside of the end of the EVA outer tube 3 and an easy-tear strip 4 is adhered, the easy-tear strip 4 is not adhered to the outside of the paper tube 1, and it is convenient to grab the easy-tear strip 4 and tear off the adhesive strip 2 from one end of the easy-tear strip 4.

[0033] When securing the EVA outer tube 3, the EVA outer tube 3 is directly secured to the outside of the paper tube 1 using the adhesive strip 2. If either the EVA outer tube 3 or the paper tube 1 is deformed or damaged and needs to be removed, the easy-tear strip 4 is torn toward the EVA outer tube 3. When the easy-tear strip 4 contacts the EVA outer tube 3, the end edges of the adhesive strip 2 and the EVA outer tube 3 connected to the easy-tear strip 4 are lifted up. As the adhesive strip 2 is torn away, it loses its connection with the paper tube 1, and the EVA outer tube 3 adhered to the adhesive strip 2 is removed from the paper tube 1, making it easier to remove from the paper tube 1 and reuse the intact EVA outer tube 3 or paper tube 1. Furthermore, the adhesive strip 2 is adhered to the outer surface of the paper tube 1, allowing the EVA outer tube 3 and paper tube 1 to be removed without damaging the structure of the paper tube 1. After removal, the structure of the paper tube 1 remains intact, and the overall structure of the seamless foam tube after reuse maintains substantially the same load-bearing capacity as before reuse, reducing the risk of deformation and damage.

[0034] refer to Figure 1 、 Figure 2 and Figure 4In this embodiment, the adhesive strip 2 is located on the outside of the end of the EVA outer tube 3 and is fixedly connected to a blocking strip 5, which is adhered to the outside of the paper tube 1. The blocking strip 5 is connected to the outer side of the end away from the EVA outer tube 3 and the easy-tear strip 4. The blocking strip 5 can limit the EVA outer tube 3 to be sleeved on the preset position of the paper tube 1. During batch production, the position error of the EVA outer tube 3 of the seamless foam tubes of the same batch on the paper tube 1 can be reduced; the length of the end of the blocking strip 5 that abuts the EVA outer tube 3 is greater than the length of the end of the easy-tear strip 4 close to the EVA outer tube 3, which increases the contact area between the blocking strip 5 and the end of the EVA outer tube 3. When the easy-tear strip 4 is torn toward the EVA outer tube 3 and the EVA outer tube 3 is disassembled, the end of the EVA outer tube 3 is more easily lifted up. Preferably, the outer side surface of the baffle 5 is set to be rounded. When the baffle 5 is lifted up along with the tear strip 4, the outer side surface of the baffle 5 with the rounded corners contacts the end of the EVA outer tube 3, which can reduce damage to the end of the EVA outer tube 3.

[0035] refer to Figures 1 to 3 When the tear strip 6 is torn to the barrier strip 5, it is cut off, so that the end of the EVA outer tube 3 is flush with the adhesive strip 2 on the inner side of the tear strip 6, and the adhesive effect is better. Preferably, the tear strip 6 is integrally formed with a grabbing strip at one end away from the easy-tear strip 4. The grabbing strip is located at the end of the adhesive strip 2 away from the easy-tear strip 4 and is longer than the adhesive strip 2 and is not adhered to the adhesive strip 2. Pinching the grabbing strip can make it easier to lift the tear strip 6.

[0036] Furthermore, a protective strip 7 is fixedly connected to the outside of the paper tube 1. The protective strip 7 has the same shape as the adhesive strip 2. The adhesive strip 2 and the inner side of the blocking strip 5 are adhered to the protective strip 7 facing away from the outer side of the paper tube 1. The easy-tear strip 4 is close to the outer side of the paper tube 1 and is not adhered to the protective strip 7, so that it is easy to grab the easy-tear strip 4 and tear off the adhesive strip 2. When the adhesive strip 2 is lifted up along with the easy-tear strip 4, the protective strip 7 can protect the outer side of the paper tube 1 from being damaged by the glue of the adhesive strip 2, and the thickness of the paper tube 1 does not change, so that the structure of the paper tube 1 can remain intact.

[0037] Furthermore, the extension direction of the adhesive strip 2 is consistent with the extension direction of the EVA outer tube 3 and the paper tube 1. When the adhesive strip 2 is lifted and torn along the extension direction of the paper tube 1, since the direction of disassembling the EVA outer tube 3 is the extension direction of the paper tube 1, when the adhesive strip 2 consistent with the extension direction of the paper tube 1 is torn, the resistance to disassembly is smaller and the operation is easier. The EVA outer tube 3 can be more smoothly taken away from the paper tube 1 by the adhesive strip 2.

[0038] In addition, a plurality of adhesive strips 2 are provided, and the plurality of adhesive strips 2 are distributed at intervals around the outside of the paper tube 1. The plurality of adhesive strips 2 distributed at intervals can not only increase the area where the EVA outer tube 3 is fixed to the outside of the paper tube 1, thereby making the EVA outer tube 3 more stably fixed to the outside of the paper tube 1, but also can operate a plurality of adhesive strips 2 at one time when removing the EVA outer tube 3, so as to realize tearing from multiple positions at the end of the EVA outer tube 3, making the EVA outer tube 3 easier to remove from the paper tube 1.

[0039] Furthermore, the end of the EVA outer tube away from the tear strip 4 is flush with the end of the adhesive strip 2 away from the tear strip 4, and the EVA outer tube 3 is firmly adhered to the outside of the paper tube 1 through the tear strip 4 with the flush end. When the EVA outer tube 3 is removed without using the tear strip 4, the EVA outer tube 3 is difficult to fall off from the outside of the paper tube 1, and the adhesive strip 2 does not protrude from the EVA outer tube 3, so that the outer surface of the paper tube 1 can remain smooth.

[0040] Furthermore, the length of the paper tube 1 is greater than the length of the EVA outer tube 3, that is, the end of the paper tube 1 is exposed to the end of the EVA outer tube 3. During the winding process of the material, the exposed part of the end of the paper tube 1 is convenient for fixing, marking or other processing of the roll.

[0041] The implementation principle of the embodiment of the present application is: when the EVA outer tube 3 is fixed on the outside of the paper tube 1, the tear strip 6 is torn off from the adhesive surface of the adhesive strip 2, and the EVA outer tube 3 is fixed to the outside of the paper tube 1 through the adhesive surface of the adhesive strip 2; when the EVA outer tube 3 needs to be removed, the easy-to-tear strip 4 is grabbed and torn toward the EVA outer tube 3. The adhesive strip 2 is torn, and at the same time, the EVA outer tube 3 adhered to the adhesive strip 2 moves toward the end of the paper tube 1. The adhesive strip 2 is adhered to the protective strip 7, and will not damage the paper tube 1 when torn off, so the EVA outer tube 3 can be removed without destroying the structure of the paper tube 1.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A seamless foam tube, characterized in that: The invention comprises a paper tube (1), an adhesive strip (2) being provided on the outside of the paper tube (1), an EVA outer tube (3) being adhered to the outside of the paper tube (1) through the adhesive strip (2), and an easy-tear strip (4) not adhering to the outside of the paper tube (1) being provided at one end of the adhesive strip (2) located on the outside of the end of the EVA outer tube (3).

2. A seamless foam tube according to claim 1, characterized in that: The adhesive strip (2) is provided with a blocking strip (5) on the outside of the end of the EVA outer tube (3); the blocking strip (5) is adhered to the outside of the paper tube (1); the blocking strip (5) is connected to the easy-tear strip (4) on the outside of the end away from the EVA outer tube (3); the length of the end of the blocking strip (5) abutting the EVA outer tube (3) is greater than the length of the end of the easy-tear strip (4) close to the EVA outer tube (3).

3. A seamless foam tube according to claim 2, characterized in that: The adhesive strip (2) is adhered to a tear strip (6) on the outer side facing away from the paper tube (1), and the end of the tear strip (6) close to the easy-tear strip (4) abuts against the side of the blocking strip (5) facing away from the easy-tear strip (4).

4. A seamless foam tube according to claim 2, characterized in that: A protective strip (7) having the same shape as the adhesive strip (2) is provided on the outside of the paper tube (1); the adhesive strip (2) and the inner side of the blocking strip (5) are adhered to the side of the protective strip (7) facing away from the outside of the paper tube (1); and the side of the easy-tear strip (4) close to the outside of the paper tube (1) is not adhered to the protective strip (7).

5. The seamless foam tube according to claim 1, characterized in that: The extending direction of the adhesive strip (2) is consistent with the extending direction of the EVA outer tube (3) and the paper tube (1).

6. The seamless foam tube according to claim 1, characterized in that: The adhesive strips (2) are provided in a plurality of strips, and the plurality of adhesive strips (2) are distributed at intervals around the outside of the paper tube (1).

7. The seamless foam tube according to claim 1, characterized in that: The end of the EVA outer tube away from the easy-tear strip (4) is flush with the end of the adhesive strip (2) away from the easy-tear strip (4).

8. The seamless foam tube according to claim 1, characterized in that: The length of the paper tube (1) is greater than the length of the EVA outer tube (3).

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