Stretch-resistant TPU (thermoplastic polyurethane) hot melt adhesive film

Abstract

The utility model relates to the technical field of TPU (thermoplastic polyurethane) hot melt adhesive films, in particular to a tensile TPU hot melt adhesive film which comprises a first TPU base film and a second TPU base film, a tensile component is arranged between the first TPU base film and the second TPU base film, first hydrophobic films are arranged above the first TPU base film and below the second TPU base film, second hydrophobic films are arranged on two sides of the two first hydrophobic films, and the tensile component is arranged between the first TPU base film and the second TPU base film. A plurality of breathable support frames are arranged between the first TPU base film and the first hydrophobic film above the first TPU base film, and a plurality of breathable support frames are arranged between the second TPU base film and the first hydrophobic film below the second TPU base film. According to the tensile component provided by the utility model, the transverse tensile strength of the TPU hot melt adhesive film can be increased through the transverse tensile blocks, and the longitudinal tensile strength of the TPU hot melt adhesive film can be increased through the longitudinal tensile blocks; meanwhile, the breathable supporting frame is arranged, an arc-shaped air circulation channel is formed through frame claws, and the breathable area is increased.

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 Technique

[0002] A hot melt adhesive film is a film product with or without release paper, which can be conveniently operated continuously or intermittently and can be widely used for bonding various fabrics, papers, polymer materials and metals. Among them, a TPU hot melt adhesive film is a film made of TPU material, which does not contain solvents and has excellent elasticity, softness, cold resistance, wear resistance, environmental protection and other characteristics. Due to its simple, soft, elastic, three-dimensional (thickness), easy-to-use and other characteristics, the TPU hot melt adhesive film is widely used in various textile fabrics such as shoe materials, clothing, and luggage, and is one of the preferred materials for fashion, leisure and sports brands.

[0003] For example, the authorized announcement number "CN219709409U" is a environmentally friendly breathable TPU hot melt adhesive film. Although through the setting of a breathable component, the breathable component is horizontally and vertically distributed in the middle position of the connecting film strip, the breathable component is horizontally and vertically distributed on the upper and lower sides of the reinforcing rib, and the height difference formed by the breathable component increases the breathable area of the TPU base film, making the breathability of the TPU base film better. However, in order to improve the breathability, the first longitudinal film strip and the first transverse film strip are corrugated, and the second longitudinal film strip and the second transverse film strip are corrugated. The corrugation is more easily stretched, and the tensile strength of this hot melt adhesive film is not high. Content of the Utility Model

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a tensile-resistant TPU hot melt adhesive film.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] Design a TPU hot melt adhesive film with tensile resistance, including a first TPU base film and a second TPU base film. A tensile resistance component is provided between the first TPU base film and the second TPU base film. The tensile resistance component includes a transverse tensile block, a longitudinal tensile block, a first diagonal tensile block, and a second diagonal tensile block. First hydrophobic films are provided above the first TPU base film and below the second TPU base film. Second hydrophobic films are provided on both sides of the two first hydrophobic films. A plurality of breathable support frames are provided between the first TPU base film and the first hydrophobic film above, and a plurality of breathable support frames are provided between the second TPU base film and the first hydrophobic film below. The breathable support frame includes a frame claw and a frame seat. The cross-section of the frame claw is arc-shaped. The lower end of the upper frame claw penetrates the first TPU base film and is connected to the tensile resistance component, and the upper end of the lower frame claw penetrates the second TPU base film and is connected to the tensile resistance component. The upper surface of the upper frame seat is connected to the first hydrophobic film above, and the lower surface of the lower frame seat is connected to the first hydrophobic film below.

[0007] Preferably, a first support bar is provided between the breathable support frame and the first hydrophobic film in the same front-back direction.

[0008] Preferably, a plurality of second support bars are provided between adjacent two of the first support bars.

[0009] Preferably, a plurality of grooves are provided on one side surface of the plurality of first support bars close to the breathable support frame. The plurality of grooves correspond to and match the plurality of frame seats one by one.

[0010] Preferably, a convex block is provided on one side surface of each of the plurality of frame seats close to the groove.

[0011] Preferably, a plurality of stress ribs are provided in the vertical direction on one side surface of the two second hydrophobic films close to the first hydrophobic film.

[0012] The beneficial effects of the TPU hot melt adhesive film with tensile resistance proposed by the present utility model are as follows: The provided tensile resistance component can increase the transverse tensile strength of the TPU hot melt adhesive film through the transverse tensile block, increase the longitudinal tensile strength of the TPU hot melt adhesive film through the longitudinal tensile block, and increase the diagonal tensile strength of the TPU hot melt adhesive film through the first diagonal tensile block and the second diagonal tensile block. At the same time, breathable support frames are provided to form an arc-shaped air circulation channel through the frame claws to increase the breathable area. Since the lower end of the upper frame claw penetrates the first TPU base film and is connected to the tensile resistance component, and the upper end of the lower frame claw penetrates the second TPU base film and is connected to the tensile resistance component, it prevents the TPU hot melt adhesive film from delaminating during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an exploded structural schematic diagram of the present utility model;

[0014] Figure 2Structural schematic diagram of the breathable support frame of the present utility model;

[0015] Figure 3 Enlarged view of position A of the present utility model.

[0016] In the figure: the first TPU base film 1, the second TPU base film 2, the tensile component 3, the transverse tensile block 301, the longitudinal tensile block 302, the first oblique tensile block 303, the second oblique tensile block 304, the first hydrophobic film 4, the second hydrophobic film 5, the breathable support frame 6, the frame claw 601, the frame seat 602, the first support bar 7, the second support bar 8, the groove 9, the convex block 10, the stress rib 11. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0018] Referring to Figures 1-3 , a tensile-resistant TPU hot melt adhesive film includes a first TPU base film 1 and a second TPU base film 2. A tensile component 3 is provided between the first TPU base film 1 and the second TPU base film 2. The tensile component 3 includes a transverse tensile block 301, a longitudinal tensile block 302, a first oblique tensile block 303, and a second oblique tensile block 304. By providing the tensile component 3, the transverse tensile strength of the TPU hot melt adhesive film can be increased through the transverse tensile block 301, the longitudinal tensile strength of the TPU hot melt adhesive film can be increased through the longitudinal tensile block 302, and the oblique tensile strength of the TPU hot melt adhesive film can be increased through the first oblique tensile block 303 and the second oblique tensile block 304. A first hydrophobic film 4 is provided above the first TPU base film 1 and below the second TPU base film 2. By providing the first hydrophobic film 4, it is beneficial to improve the waterproof property of the TPU hot melt adhesive film. Second hydrophobic films 5 are provided on both sides of the two first hydrophobic films 4. By providing the second hydrophobic films 5, it is beneficial to improve the waterproof property of the TPU hot melt adhesive film and also prevent the TPU hot melt adhesive film from delaminating during use.

[0019] A plurality of breathable support frames 6 are provided between the first TPU base film 1 and the upper first hydrophobic film 4, and a plurality of breathable support frames 6 are provided between the second TPU base film 2 and the lower first hydrophobic film 4. The breathable support frame 6 includes a frame claw 601 and a frame base 602. The cross-section of the frame claw 601 is arc-shaped. The lower end of the upper frame claw 601 penetrates through the first TPU base film 1 and is connected to the tensile component 3, and the upper end of the lower frame claw 601 penetrates through the second TPU base film 2 and is connected to the tensile component 3. The upper surface of the upper frame base 602 is connected to the upper first hydrophobic film 4, and the lower surface of the lower frame base 602 is connected to the lower first hydrophobic film 4. By providing the breathable support frame 6, an arc-shaped air circulation channel is formed through the frame claw 601, increasing the breathable area; since the lower end of the upper frame claw 601 penetrates through the first TPU base film 1 and is connected to the tensile component 3, and the upper end of the lower frame claw 601 penetrates through the second TPU base film 2 and is connected to the tensile component 3, it prevents the TPU hot melt adhesive film from delaminating during use.

[0020] A first support bar 7 is provided between the breathable support frame 6 and the first hydrophobic film 4 in the same front-rear direction. It serves to connect the breathable support frame 6 and also to reinforce the first hydrophobic film 4.

[0021] A plurality of second support bars 8 are provided between adjacent two first support bars 7. It serves to reinforce the first support bar 7.

[0022] A plurality of grooves 9 are provided on one side surface of the plurality of first support bars 7 close to the breathable support frame 6. The plurality of grooves 9 correspond to and match the plurality of frame bases 602 one by one. By providing the grooves 9, the connection between the frame base 602 and the first support bar 7 is made closer.

[0023] A convex block 10 is provided on one side surface of each of the plurality of frame bases 602 close to the groove 9. The convex block 10 serves to increase the friction between the frame base 602 and the first support bar 7.

[0024] A plurality of stress ribs 11 are provided vertically on one side surface of the two second hydrophobic films 5 close to the first hydrophobic film 4. The stress ribs 11 serve to increase the compressive resistance of the TPU hot melt adhesive film.

[0025] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tensile-resistant TPU hot melt adhesive film, comprising a first TPU base film (1) and a second TPU base film (2), characterized in that, A tensile component (3) is provided between the first TPU base film (1) and the second TPU base film (2). The tensile component (3) includes a transverse tensile block (301), a longitudinal tensile block (302), a first diagonal tensile block (303), and a second diagonal tensile block (304). First hydrophobic films (4) are provided above the first TPU base film (1) and below the second TPU base film (2). Second hydrophobic films (5) are provided on both sides of the two first hydrophobic films (4). A plurality of air-permeable support frames (6) are provided between the first TPU base film (1) and the first hydrophobic film (4) above. A plurality of air-permeable support frames (6) are provided between the second TPU base film (2) and the first hydrophobic film (4) below. The air-permeable support frame (6) includes a frame claw (601) and a frame seat (602). The cross-section of the frame claw (601) is arc-shaped. The lower end of the upper frame claw (601) penetrates through the first TPU base film (1) and is connected to the tensile component (3). The upper end of the lower frame claw (601) penetrates through the second TPU base film (2) and is connected to the tensile component (3). The upper surface of the upper frame seat (602) is connected to the first hydrophobic film (4) above. The lower surface of the lower frame seat (602) is connected to the first hydrophobic film (4) below.

2. The anti-tensile TPU hot melt adhesive film according to claim 1, characterized in that, First support bars (7) are provided between the air-permeable support frames (6) and the first hydrophobic films (4) in the same front-back direction.

3. The anti-tensile TPU hot melt adhesive film according to claim 2, wherein A plurality of second support bars (8) are provided between adjacent two of the first support bars (7).

4. The anti-tensile TPU hot melt adhesive film according to claim 2, wherein, A plurality of grooves (9) are provided on one side surface of the plurality of first support bars (7) close to the air-permeable support frames (6). The plurality of grooves (9) correspond to and match the plurality of frame seats (602) one by one.

5. The anti-tensile TPU hot melt adhesive film according to claim 4, characterized in that A convex block (10) is provided on one side surface of each of the plurality of frame seats (602) close to the groove (9).

6. The anti-tensile TPU hot melt adhesive film according to claim 1, wherein, A plurality of stress ribs (11) are provided in the vertical direction on one side surface of the two second hydrophobic films (5) close to the first hydrophobic film (4).

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