TPU (thermoplastic polyurethane) hot melt film with multi-layer structure
By designing a multi-layer structure of TPU hot melt film, including TPU composite layer, elastic reinforcement layer and thermal insulation layer, the brittleness problem of TPU hot melt film under tensile and high temperature conditions is solved, and higher tensile resistance and heat resistance are achieved.
Patent Information
- Application Number
- CN202421872237.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The existing TPU hot melt adhesive film is prone to rupture under excessive stretching or twisting state, resulting in damage, and is prone to softening of glue under high temperature conditions.
A multi-layer structure TPU hot melt film is designed, including a TPU composite layer, a first and a second elastic reinforcement layer, an outer protective layer and an inner protective layer, and its elasticity and heat resistance are enhanced by the arrangement of cross-distributed elastic columns and thermal insulation layers.
By enhancing elasticity and heat resistance, the tensile and high-temperature resistance of the TPU hot melt film is improved, and the problem of softening of the rubber is avoided and its service life is extended.
Smart Images
Figure CN222875528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of TPU hot-melt films, in particular to a TPU hot-melt film with a multi-layer structure. Background Art
[0002] TPU film is a film made on the basis of TPU granules through special processes such as calendering, casting, film blowing, and coating. Since TPU film has the characteristics of high moisture permeability, air permeability, cold resistance, heat resistance, wear resistance, high tension, high pulling force, and high load supporting capacity, it is widely used.
[0003] Although the existing TPU hot melt adhesive film has excellent bonding strength and water washability due to its structure, the TPU hot melt adhesive film with a single composition structure is relatively brittle and easily broken by external forces, which makes the TPU hot melt adhesive film easily damaged when it is over-stretched or twisted. Therefore, the present application designs a multi-layer TPU hot melt adhesive film to solve the above problems. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a TPU hot-melt film with a multi-layer structure.
[0005] In order to achieve the above-mentioned objectives, the utility model adopts the following technical scheme: a multi-layer TPU hot-melt film, comprising a TPU composite layer, the upper top surface of the TPU composite layer is provided with a first elastic reinforcement layer, the upper top surface of the first elastic reinforcement layer is provided with an outer protective layer, the lower bottom surface of the TPU composite layer is provided with a second elastic reinforcement layer, and the lower bottom surface of the second elastic reinforcement layer is provided with an inner protective layer.
[0006] Preferably, the TPU composite layer is composed of a first TPU cushion layer, a supporting base layer and a second TPU cushion layer, the supporting base layer is located between the first TPU cushion layer and the second TPU cushion layer, the first TPU cushion layer abuts against the first elastic reinforcement layer, and the second TPU cushion layer abuts against the second elastic reinforcement layer.
[0007] Preferably, the first elastic reinforcement layer and the second elastic reinforcement layer are both composed of a plurality of elastic rubber columns that are cross-distributed and equidistant.
[0008] Preferably, the upper top surface of the inner protective layer is provided with a first thermal insulation layer, and the lower bottom surface of the outer protective layer is provided with a second thermal insulation layer.
[0009] Preferably, abutment convex strips for abutting the first heat insulation layer are equidistantly provided on the top surface of the inner protective layer.
[0010] Preferably, the spaces between the component structures and the gaps are filled with TPU adhesive.
[0011] Compared with the prior art, the beneficial effect of the utility model is as follows: in the utility model, by the adhesive connection between the abutting convex strip and the first thermal insulation layer, it is convenient to retain better TPU adhesive at the connection point, thereby improving the stability of the adhesive connection, and then by the barrier setting of the first thermal insulation layer and the second thermal insulation layer to the middle component, the middle component structure is blocked from absorbing heat, and the middle component structure is prevented from generating heat accumulation, thereby improving the heat resistance of the TPU hot melt film, and then being able to realize the heat insulation function, and finally solving the problem that the TPU hot melt film is easy to debond and soften under high temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure proposed by the utility model;
[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the TPU composite layer proposed in the utility model;
[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the first heat insulation layer proposed by the utility model;
[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner protective layer proposed by the utility model;
[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the elastic force reinforcement layer proposed by the utility model.
[0018] Serial numbers in the figure: 1. Outer protective layer; 2. First elastic reinforcement layer; 3. TPU composite layer; 4. Second elastic reinforcement layer; 5. First TPU cushion layer; 6. Support base layer; 7. Second TPU cushion layer; 8. First thermal insulation layer; 9. Inner protective layer; 10. Abutment convex strip; 11. Elastic rubber column; 12. Second thermal insulation layer. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Example: See Figure 1-5The utility model discloses a multi-layer TPU hot-melt film, comprising a TPU composite layer 3, a first elastic reinforcement layer 2 is arranged on the upper surface of the TPU composite layer 3, an outer protective layer 1 is arranged on the upper surface of the first elastic reinforcement layer 2, a second elastic reinforcement layer 4 is arranged on the lower bottom surface of the TPU composite layer 3, and an inner protective layer 9 is arranged on the lower bottom surface of the second elastic reinforcement layer 4. The outer protective layer 1 and the inner protective layer 9 can better protect the TPU hot-melt film and prevent the TPU hot-melt film from being scratched and affecting the TPU film due to scratches. The use of PU hot melt film; the TPU composite layer 3 is composed of a first TPU cushion layer 5, a supporting base layer 6 and a second TPU cushion layer 7. The supporting base layer 6 is located between the first TPU cushion layer 5 and the second TPU cushion layer 7. The first TPU cushion layer 5 abuts against the first elastic reinforcement layer 2, and the second TPU cushion layer 7 abuts against the second elastic reinforcement layer 4. Through the setting of the supporting base layer 6, the connecting layers can be supported and bonded more stably; the first elastic reinforcement layer 2 and the second elastic reinforcement layer 4 are both composed of a number of cross-equidistantly distributed elastic rubber columns. 11, by setting the elastic rubber column 11 on the first elastic reinforcement layer 2 and the second elastic reinforcement layer 4, the elasticity of the TPU hot melt film can be better enhanced, and support can be provided for the TPU hot melt film so that the TPU hot melt film can be wrinkle-proof, and the gaps in which the elastic rubber columns 11 are cross-distributed can be filled with more; the upper top surface of the inner protective layer 9 is provided with a first thermal insulation layer 8, and the lower bottom surface of the outer protective layer 1 is provided with a second thermal insulation layer 12. By setting the first thermal insulation layer 8 and the second thermal insulation layer 12, the internal of the TPU film can be reduced. Thermal accumulation, thereby enhancing the heat resistance of the TPU hot melt film; the top surface of the inner protective layer 9 is equidistantly provided with abutting ridges 10 for abutting the first thermal insulation layer 8. Through the setting of the abutting ridges 10, the content and contact area of the TPU adhesive can be increased, thereby improving the bonding stability between the inner protective layer 9 and the first thermal insulation layer 8, and preventing the inner protective layer 9 from debonding or bulging; TPU adhesive is filled between each component structure and the gap, and through the setting of the TPU adhesive, the component structures can be better bonded.
[0021] Working principle: When the utility model is used, first, the first TPU cushion layer 5 and the second TPU cushion layer 7 are glued on both sides of the supporting base layer 6 by TPU adhesive, and then the first elastic reinforcement layer 2 is placed on the side of the first TPU cushion layer 5, and then the TPU adhesive is brushed on the first elastic reinforcement layer 2, and the TPU adhesive will be poured into the gap of the first elastic reinforcement layer 2, and then the outer protective layer 1 with the second thermal insulation layer 12 is pressed down to squeeze out the excess TPU adhesive, and then the second elastic reinforcement layer 4 is bonded according to the above operation, and the TPU adhesive in the gap between the first elastic reinforcement layer 2 and the second elastic reinforcement layer 4 can further fit the composition structure of the upper and lower ends of the first elastic reinforcement layer 2 and the second elastic reinforcement layer 4, so that the bonding of the TPU hot melt film is tighter, and the TPU hot melt film is prevented from debonding or bulging, and then the inner protective layer 9 with the first thermal insulation layer 8 is pressed down to squeeze out the excess TPU adhesive, and the bonding of the multi-layer TPU hot melt film is completed.
[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A multi-layer TPU hot-melt film, comprising a TPU composite layer (3), characterized in that: The upper top surface of the TPU composite layer (3) is provided with a first elastic reinforcement layer (2), the upper top surface of the first elastic reinforcement layer (2) is provided with an outer protective layer (1), the lower bottom surface of the TPU composite layer (3) is provided with a second elastic reinforcement layer (4), and the lower bottom surface of the second elastic reinforcement layer (4) is provided with an inner protective layer (9).
2. The multi-layer TPU hot-melt film according to claim 1, characterized in that: The TPU composite layer (3) is composed of a first TPU cushion layer (5), a supporting base layer (6) and a second TPU cushion layer (7); the supporting base layer (6) is located between the first TPU cushion layer (5) and the second TPU cushion layer (7); the first TPU cushion layer (5) is in contact with the first elastic reinforcement layer (2); and the second TPU cushion layer (7) is in contact with the second elastic reinforcement layer (4).
3. The multi-layer TPU hot-melt film according to claim 2, characterized in that: The first elastic reinforcement layer (2) and the second elastic reinforcement layer (4) are both composed of a plurality of elastic rubber columns (11) that are cross-distributed and equidistant.
4. The multi-layer TPU hot-melt film according to claim 3, characterized in that: The upper top surface of the inner protective layer (9) is provided with a first heat insulation layer (8), and the lower bottom surface of the outer protective layer (1) is provided with a second heat insulation layer (12).
5. The multi-layer TPU hot-melt film according to claim 4, characterized in that: The top surface of the inner protective layer (9) is provided with equidistantly protruding abutting convex strips (10) for abutting against the first heat insulating layer (8).
6. The multi-layer TPU hot-melt film according to claim 5, characterized in that: TPU adhesive is filled between the component structures and the gaps.