Tensile TPU (thermoplastic polyurethane) hot melt adhesive film

Abstract

The utility model relates to the technical field of TPU hot melt adhesive films, and discloses a tensile TPU hot melt adhesive film which comprises an outer sealing strip and a T-shaped sliding groove, an outer layer adhesive film is fixedly connected to the interior of the outer sealing strip, a first bonding layer is fixedly connected to the bottom of the outer layer adhesive film, a supporting layer is fixedly connected to the bottom of the first bonding layer, and a second bonding layer is fixedly connected to the bottom of the supporting layer. A second bonding layer is fixedly connected to the bottom of the supporting layer, a base plate is fixedly connected to the bottom of the second bonding layer, and an anti-deformation mechanism is fixedly connected to the center of the surface of the supporting layer. According to the tensile TPU hot melt adhesive film, through the arrangement of the first bonding layer, the supporting layer, the second bonding layer and the deformation-resistant mechanism, when the TPU hot melt adhesive film is stretched by external force, transverse and longitudinal force borne by the TPU hot melt adhesive film can be decomposed under the action of the deformation-resistant mechanism under the action of the deformation-resistant mechanism; and when the TPU hot melt film is pulled by external force, the internal stress of the TPU hot melt film is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of TPU hot melt adhesive films, in particular to a tensile-resistant TPU hot melt adhesive film. Background Art

[0002] TPU hot melt adhesive film is a new type of adhesive material, and its background technology involves the field of polymer adhesive technology, especially the production and application of hot melt adhesive film. This material uses an advanced production process to heat the polymer material to a molten state, and then uses a special coating technology to evenly coat it on the substrate. When heated at high temperature, the TPU hot melt adhesive film becomes fluid and sticky, which can tightly connect the two bonded materials and form covalent bonds through chemical reactions to achieve a permanent bonding effect.

[0003] After consulting relevant information, it is found that there are still some problems with the existing tensile-resistant TPU hot-melt adhesive film. At present, most hot-melt adhesive films are prone to plastic deformation when pulled by external force, or the threshold for plastic deformation is very low. In view of the above problems, by setting a first adhesive layer, a support layer, a second adhesive layer, and an anti-deformation mechanism, when the TPU hot-melt adhesive film is stretched by external force, the lateral and longitudinal forces on the TPU hot-melt adhesive film can be decomposed under the action of the anti-deformation mechanism, so that when the TPU hot-melt adhesive film is pulled by external force, the internal force is more uniform, and the TPU hot-melt adhesive film will not be unevenly stressed due to its internal force. The PU hot melt film undergoes plastic deformation during the pulling process. By setting up transverse auxiliary tensile blocks and longitudinal auxiliary tensile blocks and pull strips, when transverse or longitudinal forces occur, the transverse auxiliary tensile blocks will assist in pulling the end of the hot melt film that is not subjected to transverse force toward the end that is subjected to transverse force, so that the transverse force is more evenly distributed inside the hot melt film, and the direction of the pulling force will be unified in one direction to avoid transverse plastic deformation. Similarly, when the hot melt film is subjected to transverse force, its force principle is the same as that of longitudinal force. This method makes it difficult for the TPU hot melt film to undergo plastic deformation when subjected to external tensile force. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a tensile-resistant TPU hot-melt adhesive film.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tensile-resistant TPU hot-melt adhesive film, comprising an outer sealing strip and a T-shaped slide groove, the outer sealing strip is fixedly connected to the inside of the outer layer of adhesive film, the bottom of the outer layer of adhesive film is fixedly connected to a first adhesive layer, the bottom of the first adhesive layer is fixedly connected to a supporting layer, the bottom of the supporting layer is fixedly connected to a second adhesive layer, the bottom of the second adhesive layer is fixedly connected to a substrate, the center of the surface of the supporting layer is fixedly connected to an anti-deformation mechanism, the T-shaped slide groove intersects at the position of the anti-deformation mechanism, a pull strip is inserted into the inside of the anti-deformation mechanism, one end of the pull strip is fixedly connected to a transverse auxiliary tensile block, and the end of the pull strip away from the transverse auxiliary tensile block is fixedly connected to a longitudinal auxiliary tensile block.

[0006] As a further improvement of the above solution, a T-shaped slide groove is provided inside the support layer, and the T-shaped slide groove is divided into a horizontal direction and a vertical direction.

[0007] As a further improvement of the above solution, the first adhesive layer, the supporting layer, the second adhesive layer, and the substrate are all fixedly connected to the inner wall of the outer sealing strip.

[0008] As a further improvement of the above scheme, the anti-deformation mechanism includes a supporting ring, which is divided into two layers. Auxiliary rollers are rotatably connected between the two layers of the supporting rings. The auxiliary rollers are grouped in pairs, and each group of auxiliary rollers is distributed in a circular array with the supporting ring as the axis. The circumferential surface of the auxiliary rollers is provided with grooves.

[0009] As a further improvement of the above scheme, a clamping block is fixedly connected to the upper surface of the transverse auxiliary tensile block, and the clamping block is symmetrically distributed with the transverse auxiliary tensile block as the axis. The clamping block and the T-shaped slide groove are mutually clamped, and a pull rod connecting block is fixedly connected to the side of the transverse auxiliary tensile block close to the anti-deformation mechanism.

[0010] As a further improvement of the above scheme, the pull rod connecting block is symmetrically distributed with the transverse auxiliary tensile block as the axis, the transverse auxiliary tensile block is slidably connected to the inside of the transverse T-shaped slide groove, and the longitudinal auxiliary tensile block is slidably connected to the inside of the longitudinal T-shaped slide groove.

[0011] As a further improvement of the above scheme, the surface of the longitudinal auxiliary tensile block is also fixedly connected with a pull rod connecting block, the transverse auxiliary tensile block and the longitudinal auxiliary tensile block are connected to each other through a pull rod, the pull rod is in contact with the surface of the auxiliary roller, and two pull rods are fixedly connected on the surface of the transverse auxiliary tensile block and the longitudinal auxiliary tensile block respectively.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This kind of tensile-resistant TPU hot-melt adhesive film is provided with a first adhesive layer, a supporting layer, a second adhesive layer, and an anti-deformation mechanism. When the TPU hot-melt adhesive film is stretched by an external force, the lateral and longitudinal forces on the TPU hot-melt adhesive film can be decomposed under the action of the anti-deformation mechanism, so that when the TPU hot-melt adhesive film is pulled by an external force, the internal force is more uniform, and the TPU hot-melt adhesive film will not undergo plastic deformation during the pulling process due to uneven internal force.

[0014] 2. This type of tensile-resistant TPU hot-melt adhesive film is provided with transverse auxiliary tensile blocks and longitudinal auxiliary tensile blocks and pull strips. When transverse or longitudinal forces occur, the transverse auxiliary tensile blocks will assist in pulling the end of the hot-melt film that is not subjected to transverse forces toward the end that is subjected to transverse forces, so that the transverse forces are more evenly distributed inside the hot-melt film, and the direction of the tensile forces will be unified in one direction to avoid transverse plastic deformation. Similarly, when the hot-melt film is subjected to transverse forces, the force principle is the same as that of longitudinal forces. This method makes it difficult for the TPU hot-melt film to undergo plastic deformation when subjected to external tensile forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the utility model;

[0016] Figure 2 This is an exploded schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the support layer of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the anti-deformation mechanism of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the transverse auxiliary tensile block of the utility model.

[0020] Description of main symbols:

[0021] 1. Outer sealing strip; 2. Outer adhesive film; 3. First adhesive layer; 301. Snap-in groove; 4. Support layer; 401. T-shaped slide groove; 5. Second adhesive layer; 6. Base plate; 7. Anti-deformation mechanism; 701. Support ring; 702. Auxiliary roller; 8. Pull rod; 9. Horizontal auxiliary tensile block; 901. Clamp block; 902. Pull rod connecting block; 10. Longitudinal auxiliary tensile block. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. Example

[0023] Please combine Figure 1-5 A tensile-resistant TPU hot-melt adhesive film of the present embodiment includes an outer sealing strip 1 and a T-shaped slide groove 401. An outer layer adhesive film 2 is fixedly connected inside the outer sealing strip 1, a first adhesive layer 3 is fixedly connected to the bottom of the outer layer adhesive film 2, a supporting layer 4 is fixedly connected to the bottom of the first adhesive layer 3, a second adhesive layer 5 is fixedly connected to the bottom of the supporting layer 4, a substrate 6 is fixedly connected to the bottom of the second adhesive layer 5, an anti-deformation mechanism 7 is fixedly connected at the center of the surface of the supporting layer 4, the T-shaped slide groove 401 intersects at the position of the anti-deformation mechanism 7, a pull strip 8 is inserted inside the anti-deformation mechanism 7, one end of the pull strip 8 is fixedly connected to a transverse auxiliary tensile block 9, and the end of the pull strip 8 away from the transverse auxiliary tensile block 9 is fixedly connected to a longitudinal auxiliary tensile block 10.

[0024] A T-shaped slide groove 401 is provided inside the supporting layer 4 , and the T-shaped slide groove 401 is divided into a horizontal direction and a vertical direction.

[0025] The first adhesive layer 3 , the supporting layer 4 , the second adhesive layer 5 , and the base plate 6 are all fixedly connected to the inner wall of the outer sealing strip 1 .

[0026] The anti-deformation mechanism 7 includes a supporting ring 701, which is divided into two layers. Auxiliary rollers 702 are rotatably connected between the two layers of supporting rings 701. The auxiliary rollers 702 form a group of two, and each group of auxiliary rollers 702 is distributed in a circular array with the supporting ring 701 as the axis. The circumferential surface of the auxiliary rollers 702 is provided with grooves.

[0027] A clamping block 901 is fixedly connected to the upper surface of the transverse auxiliary tensile block 9. The clamping block 901 is symmetrically distributed with the transverse auxiliary tensile block 9 as the axis. The clamping block 901 is mutually clamped with the T-shaped slide groove 401. A pull rod connecting block 902 is fixedly connected to the side of the transverse auxiliary tensile block 9 close to the anti-deformation mechanism 7.

[0028] The tie rod connection blocks 902 are symmetrically distributed with the transverse auxiliary tensile block 9 as the axis. The transverse auxiliary tensile block 9 is slidably connected to the inside of the transverse T-shaped slide groove 401 , and the longitudinal auxiliary tensile block 10 is slidably connected to the inside of the longitudinal T-shaped slide groove 401 .

[0029] The surface of the longitudinal auxiliary tensile block 10 is also fixedly connected with a tie rod connecting block 902. The transverse auxiliary tensile block 9 and the longitudinal auxiliary tensile block 10 are connected to each other through a tie rod 8. The tie rod 8 is in contact with the surface of the auxiliary roller 702. Two tie rods 8 are fixedly connected on the surface of the transverse auxiliary tensile block 9 and the longitudinal auxiliary tensile block 10 respectively.

[0030] The working principle of a tensile-resistant TPU hot-melt adhesive film in the embodiment of the present application is as follows: when the TPU hot-melt adhesive film is subjected to external force, taking the longitudinal force as an example, the outer seal 1 will be pulled longitudinally first. At this time, the substrate 6 and the outer adhesive film 2 will be pulled longitudinally. Since the first adhesive layer 3 is fixedly connected to the outer adhesive film 2, the first adhesive layer 3 will be subjected to the same tensile force at this time. Since the clamping block 901 is clamped in the clamping groove 301, the first adhesive layer 3 at the stressed end of the outer seal 1 will drive the lateral auxiliary tensile block 9 on the corresponding side to move, and the moving direction is the same as the tensile force. When the lateral auxiliary tensile block 9 is driven to move by the first adhesive layer 3, the lateral The auxiliary tensile block 9 will be driven by the pull rod 8 so that the lateral auxiliary tensile block 9 on the symmetrical side of the current lateral auxiliary tensile block 9 will be pulled to move in the same direction, which makes the end of the outer seal 1 that is not directly stressed passively pulled toward the end of the outer seal 1 that is directly stressed, and at the same time, the two groups of longitudinal auxiliary tensile blocks 10 will move relative to each other, which makes the hot-melt film pull the external filler and other materials into the hot-melt film in its internal lateral position, so that the hot-melt film can gather inwardly in the lateral direction when subjected to longitudinal force, which makes it possible to achieve a higher degree of deformation in the longitudinal direction, thereby reducing the probability of plastic deformation. On the contrary, when subjected to lateral force, the principle is similar to that of the longitudinal direction.

[0031] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A tensile TPU hot melt adhesive film, characterized in that: The invention comprises an outer sealing strip (1) and a T-shaped slide groove (401), wherein an outer layer of adhesive film (2) is fixedly connected inside the outer sealing strip (1), a first adhesive layer (3) is fixedly connected at the bottom of the outer layer of adhesive film (2), a supporting layer (4) is fixedly connected at the bottom of the first adhesive layer (3), a second adhesive layer (5) is fixedly connected at the bottom of the supporting layer (4), a base plate (6) is fixedly connected at the bottom of the second adhesive layer (5), an anti-deformation mechanism (7) is fixedly connected at the center of the surface of the supporting layer (4), the T-shaped slide groove (401) intersects at the position of the anti-deformation mechanism (7), a pull rod (8) is inserted inside the anti-deformation mechanism (7), one end of the pull rod (8) is fixedly connected to a transverse auxiliary tensile block (9), and one end of the pull rod (8) away from the transverse auxiliary tensile block (9) is fixedly connected to a longitudinal auxiliary tensile block (10).

2. The tensile-resistant TPU hot-melt adhesive film according to claim 1, characterized in that: A T-shaped slide groove (401) is provided inside the support layer (4), and the T-shaped slide groove (401) is divided into a transverse direction and a longitudinal direction.

3. The tensile-resistant TPU hot-melt adhesive film according to claim 1, characterized in that: The first adhesive layer (3), the supporting layer (4), the second adhesive layer (5), and the base plate (6) are all fixedly connected to the inner wall of the outer sealing strip (1).

4. The tensile-resistant TPU hot-melt adhesive film according to claim 1, characterized in that: The anti-deformation mechanism (7) comprises a supporting ring (701), the supporting ring (701) being divided into two layers, an auxiliary roller (702) being rotatably connected between the two layers of the supporting rings (701), the auxiliary rollers (702) forming a group of two each, the auxiliary rollers (702) in each group being arranged in a circular array with the supporting ring (701) as the axis, and the circumferential surfaces of the auxiliary rollers (702) being provided with grooves.

5. The tensile-resistant TPU hot-melt adhesive film according to claim 1, characterized in that: A clamping block (901) is fixedly connected to the upper surface of the transverse auxiliary tensile block (9); the clamping blocks (901) are symmetrically distributed with the transverse auxiliary tensile block (9) as the axis; the clamping block (901) and the T-shaped slide groove (401) are mutually clamped; and a pull rod connecting block (902) is fixedly connected to a side of the transverse auxiliary tensile block (9) close to the anti-deformation mechanism (7).

6. The tensile-resistant TPU hot-melt adhesive film according to claim 5, characterized in that: The tie rod connection blocks (902) are symmetrically distributed with the transverse auxiliary tensile block (9) as the axis, the transverse auxiliary tensile block (9) is slidably connected to the inside of the transverse T-shaped slide groove (401), and the longitudinal auxiliary tensile block (10) is slidably connected to the inside of the longitudinal T-shaped slide groove (401).

7. The tensile-resistant TPU hot-melt adhesive film according to claim 4, characterized in that: The surface of the longitudinal auxiliary tensile block (10) is also fixedly connected with a tie rod connection block (902); the transverse auxiliary tensile block (9) and the longitudinal auxiliary tensile block (10) are connected to each other via a tie rod (8); the tie rod (8) is in contact with the surface of the auxiliary roller (702); and two tie rods (8) are fixedly connected on the surface of each of the transverse auxiliary tensile block (9) and the longitudinal auxiliary tensile block (10).

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