TPU (thermoplastic polyurethane) base material stretching double-faced adhesive tape and preparation process thereof

Abstract

The invention discloses a TPU base material stretching double-faced adhesive tape and a preparation technology, the TPU base material stretching double-faced adhesive tape comprises a double-faced adhesive tape body, the double-faced adhesive tape body comprises release paper, a first adhesive tape, a stretching assembly, a TPU base material body, a protection assembly and a second adhesive tape, and the release paper, the first adhesive tape, the stretching assembly, the TPU base material body, the protection assembly and the second adhesive tape are sequentially arranged from outside to inside. The protection assembly is arranged, the flame-retardant layer is prepared by mixing a flame-retardant film and a flame-retardant coating, the waterproof layer is prepared by mixing a waterproof film and a waterproof coating, the waterproof and flame-retardant properties of the double-sided adhesive tape are improved through laying of the protection assembly, and the use effect is improved; the first adhesive tape and the second adhesive tape are arranged, and the adhesive tapes are prepared by mixing the low-surface-applicable adhesive material and the medium-high-surface-applicable adhesive material, so that the double-sided adhesive tape can be conveniently adhered to different surfaces, and the flexibility is high.

Description

Technical Field

[0001] The present invention relates to the technical field of double-sided adhesives, and specifically to a TPU-based stretched double-sided adhesive and its preparation process. Background Art

[0002] The TPU-based stretched double-sided adhesive can play a role in fixing, fitting, and sealing in the assembly of electronic products. For example, between the screens and metal or plastic casings of electronic products such as mobile phones, tablet computers, and TVs, and between the batteries and battery covers, using TPU double-sided adhesive can firmly bond and play a role in fixing components. However, when electronic products are recycled, they need to be disassembled to separate copper from the PC board, and the TPU-based stretched double-sided adhesive recycles the TPU substrate to achieve the effect of disassembling and separating an object. In addition, during the manufacturing process of automotive parts, the TPU-based stretched double-sided adhesive can be used for the assembly of automotive interior parts such as interior trim pieces, instrument panels, and door handles in the vehicle. Using TPU double-sided adhesive can achieve the purpose of fixing components, reducing noise, and improving assembly efficiency.

[0003] However, the traditional TPU-based stretched double-sided adhesive has the following disadvantages: The traditional TPU-based stretched double-sided adhesive generally has average waterproof or flame-retardant effects and cannot meet people's requirements for the flame-retardant and waterproof properties of the TPU-based stretched double-sided adhesive. Summary of the Invention

[0004] The purpose of the present invention is to provide a TPU-based stretched double-sided adhesive and its preparation process to solve the problems in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A TPU-based stretched double-sided adhesive includes a double-sided adhesive body, and the double-sided adhesive body includes a release paper, a first adhesive tape, a stretching component, a TPU substrate body, a protection component, and a second adhesive tape, which are arranged in sequence from the outside to the inside.

[0006] Preferably, the top end of the TPU substrate body is connected to the bottom end of the stretching component, the top end of the stretching component is adhesively connected to the bottom end of the first adhesive tape, the top end of the first adhesive tape is adhesively connected to the bottom end of the release paper, the bottom end of the TPU substrate body is connected to the top end of the protection component, and the bottom end of the protection component is adhesively connected to the top end of the second adhesive tape.

[0007] Preferably, the stretching component includes a stretching belt and a plurality of stretching strips. A plurality of stretching grooves are formed on one side of the stretching belt, and a plurality of through grooves are formed inside the stretching belt. The plurality of through grooves are respectively arranged corresponding to the plurality of stretching strips.

[0008] Preferably, the stretching belt is made of polyethylene terephthalate, polypropylene and polyvinyl chloride.

[0009] Preferably, the protection component includes a flame retardant layer and a waterproof layer, and the bottom end of the flame retardant layer is fixedly connected to the top end of the waterproof layer.

[0010] Preferably, the top end of the flame retardant layer is fixedly connected to the TPU substrate body, and the bottom end of the waterproof layer is fixedly connected to the second adhesive tape.

[0011] Preferably, the flame retardant layer is made of FR-B8012-6 and polyester film.

[0012] Preferably, the waterproof layer is made of polyurethane and SBS polymer modified emulsified asphalt.

[0013] Preferably, the first adhesive tape and the second adhesive tape are made of α-cyanoacrylate primer, polyethylene terephthalate, acrylonitrile-butadiene-styrene and polymethyl methacrylate.

[0014] A preparation process of a TPU substrate stretching double-sided tape includes the following steps:

[0015] Step 1, prepare the protection component: coat 45-55 parts of FR-B8012-6 on the surface of 45-55 parts of polyester film to obtain the flame retardant layer, and then coat 40-60 parts of SBS polymer modified emulsified asphalt on the surface of 40-60 parts of polyurethane to obtain the waterproof layer, and then bond the prepared flame retardant layer and waterproof layer together;

[0016] Step 2, prepare the TPU substrate body: coat the TPU aqueous solution on the surface of the first silicone release film to form a layer, and set the second silicone release film on the side of the TPU layer away from the first silicone release film;

[0017] Step 3, prepare the stretching component: fully mix 20-45 parts of polyethylene terephthalate, 20-45 parts of polypropylene and 20-45 parts of polyvinyl chloride and press them into strips to obtain the required stretching component;

[0018] Step 4, prepare the adhesive tape: fully mix 20-40 parts of α-cyanoacrylate primer, 20-40 parts of polyethylene terephthalate, 20-40 parts of acrylonitrile-butadiene-styrene and 20-40 parts of polymethyl methacrylate and use a mold to obtain the required first adhesive tape and second adhesive tape;

[0019] Step 5, press the double-sided tape: bond the prepared release paper, first adhesive tape, stretching component, TPU substrate body, protection component and second adhesive tape together.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. By setting up a protective component, the flame-retardant layer is prepared by mixing a flame-retardant film and a flame-retardant coating, and the waterproof layer is prepared by mixing a waterproof film and a waterproof coating. The laying of the protective component increases the waterproof and flame-retardant properties of the double-sided adhesive itself and improves its use effect.

[0022] 2. By setting up a first adhesive tape and a second adhesive tape, the adhesive tape is prepared by mixing a low surface-applicable adhesive material and a medium-high surface-applicable adhesive material, which facilitates the adhesion of the double-sided adhesive on different surfaces and has high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic structural diagram of the stretching component of the present invention;

[0026] Figure 3 is a schematic structural diagram of the protective component of the present invention;

[0027] Figure 4 is a flow chart of the present invention.

[0028] In the figure: 1. Double-sided adhesive body; 2. Release paper; 3. First adhesive tape; 4. Stretching component; 41. Stretching belt; 42. Stretching groove; 43. Stretching bar; 44. Interpenetrating groove; 5. TPU substrate body; 6. Protective component; 61. Flame-retardant layer; 62. Waterproof layer; 7. Second adhesive tape. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention.

[0030] Please refer to Figure 1, in the embodiments of the present invention, a TPU-based stretch double-sided adhesive tape includes a double-sided adhesive tape body 1. The double-sided adhesive tape body 1 includes a release paper 2, a first adhesive tape 3, a stretching component 4, a TPU substrate body 5, a protection component 6, and a second adhesive tape 7. The release paper 2, the first adhesive tape 3, the stretching component 4, the TPU substrate body 5, the protection component 6, and the second adhesive tape 7 are arranged in sequence from the outside to the inside; the top of the TPU substrate body 5 is connected to the bottom of the stretching component 4, the top of the stretching component 4 is adhesively connected to the bottom of the first adhesive tape 3, the top of the first adhesive tape 3 is adhesively connected to the bottom of the release paper 2, the bottom of the TPU substrate body 5 is connected to the top of the protection component 6, and the bottom of the protection component 6 is adhesively connected to the top of the second adhesive tape 7.

[0031] As Figure 2 , the stretching component 4 includes a stretching belt 41 and a plurality of stretching strips 43. A plurality of stretching grooves 42 are formed on one side of the stretching belt 41, and a plurality of insertion grooves 44 are formed inside the stretching belt 41. The plurality of insertion grooves 44 are respectively arranged corresponding to the plurality of stretching strips 43. The stretching belt 41 is made of polyethylene terephthalate, polypropylene, and polyvinyl chloride.

[0032] As Figure 1 and 3 , the protection component 6 includes a flame retardant layer 61 and a waterproof layer 62. The bottom of the flame retardant layer 61 is fixedly connected to the top of the waterproof layer 62, the top of the flame retardant layer 61 is fixedly connected to the TPU substrate body 5, the bottom of the waterproof layer 62 is fixedly connected to the second adhesive tape 7. The flame retardant layer 61 is made of FR-B8012-6 and polyester film, and the waterproof layer 62 is made of polyurethane and SBS polymer modified emulsified asphalt; by setting the protection component, the flame retardant layer is prepared by mixing a flame retardant film and a flame retardant coating, and the waterproof layer is prepared by mixing a waterproof film and a waterproof coating. The laying of the protection component increases the waterproof and flame retardant properties of the double-sided adhesive tape itself and improves its use effect.

[0033] As Figure 1 , the first adhesive tape 3 and the second adhesive tape 7 are made of α-cyanoacrylate primer, polyethylene terephthalate, acrylonitrile-butadiene-styrene, and polymethyl methacrylate; by setting the first adhesive tape and the second adhesive tape, the adhesive tape is prepared by mixing a low surface adhesion glue material and a medium-high surface adhesion glue material, which is convenient for the double-sided adhesive tape to adhere to different surfaces and has high flexibility.

[0034] Example 1:

[0035] The first adhesive tape 3 and the second adhesive tape 7 are made of the following components: by weight, 20 parts - 40 parts of α-cyanoacrylate primer, 20 parts - 40 parts of polyethylene terephthalate, 20 parts - 40 parts of acrylonitrile-butadiene-styrene, and 20 parts - 40 parts of polymethyl methacrylate. The stretching tape 41 is made of the following components: by weight, 20 parts - 45 parts of polyethylene terephthalate, 20 parts - 45 parts of polypropylene, and 20 parts - 45 parts of polyvinyl chloride. The flame retardant layer 61 is made of the following components: by weight, 45 parts - 55 parts of FR-B8012-6 and 45 parts - 55 parts of polyester film. The waterproof layer 62 is made of the following components: by weight, 40 parts - 60 parts of polyurethane and 40 parts - 60 parts of SBS polymer modified emulsified asphalt.

[0036] The preparation process of a TPU-based stretching double-sided adhesive tape of the present invention includes the following steps:

[0037] Step 1, prepare the protection component 6: coat 45 parts - 55 parts of FR-B8012-6 on the surface of 45 parts - 55 parts of polyester film to obtain the flame retardant layer 61, and then coat 40 parts - 60 parts of SBS polymer modified emulsified asphalt on the surface of 40 parts - 60 parts of polyurethane to obtain the waterproof layer 62, and then bond the prepared flame retardant layer 61 and waterproof layer 62 together;

[0038] Step 2, prepare the TPU substrate body 5: coat a layer of TPU aqueous solution on the surface of the first silicone release film, and set the second silicone release film on the side of the TPU layer away from the first silicone release film;

[0039] Step 3, prepare the stretching component 4: fully mix 20 parts - 45 parts of polyethylene terephthalate, 20 parts - 45 parts of polypropylene, and 20 parts - 45 parts of polyvinyl chloride and press them into strips to obtain the required stretching component 4;

[0040] Step 4, prepare the adhesive tape: fully mix 20 parts - 40 parts of α-cyanoacrylate primer, 20 parts - 40 parts of polyethylene terephthalate, 20 parts - 40 parts of acrylonitrile-butadiene-styrene, and 20 parts - 40 parts of polymethyl methacrylate and use a mold to obtain the required first adhesive tape 3 and second adhesive tape 7;

[0041] Step 5, press the double-sided adhesive tape: bond the obtained release paper 2, first adhesive tape 3, stretching component 4, TPU substrate body 5, protection component 6, and second adhesive tape 7 together.

[0042] Example 2:

[0043] The first adhesive tape 3 and the second adhesive tape 7 are made of the following components: by weight, 25 parts of α-cyanoacrylate primer, 25 parts of polyethylene terephthalate, 25 parts of acrylonitrile-butadiene-styrene, and 25 parts of polymethyl methacrylate. The stretching tape 41 is made of the following components: by weight, 30 parts of polyethylene terephthalate, 30 parts of polypropylene, and 40 parts of polyvinyl chloride. The flame retardant layer 61 is made of the following components: by weight, 50 parts of FR-B8012-6 and 50 parts of polyester film. The waterproof layer 62 is made of the following components: by weight, 45 parts of polyurethane and 55 parts of SBS polymer modified emulsified asphalt.

[0044] A preparation process of a TPU-based stretching double-sided adhesive tape according to the present invention comprises the following steps:

[0045] Step 1, preparing the protection component 6: coating 50 parts of FR-B8012-6 on the surface of 50 parts of polyester film to obtain the flame retardant layer 61, then coating 55 parts of SBS polymer modified emulsified asphalt on the surface of 45 parts of polyurethane to obtain the waterproof layer 62, and then bonding the prepared flame retardant layer 61 and waterproof layer 62 together;

[0046] Step 2, preparing the TPU substrate body 5: coating a layer of TPU aqueous solution on the surface of the first silicone oil release film, and setting the second silicone oil release film on one side of the TPU layer away from the first silicone oil release film;

[0047] Step 3, preparing the stretching component 4: fully mixing 30 parts of polyethylene terephthalate, 30 parts of polypropylene, and 40 parts of polyvinyl chloride and pressing them into strips to obtain the required stretching component 4;

[0048] Step 4, preparing the adhesive tape: fully mixing 25 parts of α-cyanoacrylate primer, 25 parts of polyethylene terephthalate, 25 parts of acrylonitrile-butadiene-styrene, and 25 parts of polymethyl methacrylate and passing them through a mold to obtain the required first adhesive tape 3 and second adhesive tape 7;

[0049] Step 5, pressing the double-sided adhesive tape: bonding the obtained release paper 2, first adhesive tape 3, stretching component 4, TPU substrate body 5, protection component 6, and second adhesive tape 7 together.

[0050] Example 3:

[0051] The first adhesive tape 3 and the second adhesive tape 7 are made of the following components: by weight, 20 parts of α-cyanoacrylate primer, 30 parts of polyethylene terephthalate, 30 parts of acrylonitrile-butadiene-styrene, and 20 parts of polymethyl methacrylate. The stretching tape 41 is made of the following components: by weight, 45 parts of polyethylene terephthalate, 25 parts of polypropylene, and 30 parts of polyvinyl chloride. The flame retardant layer 61 is made of the following components: by weight, 50 parts of FR-B8012-6 and 50 parts of polyester film. The waterproof layer 62 is made of the following components: by weight, 50 parts of polyurethane and 50 parts of SBS polymer modified emulsified asphalt.

[0052] A preparation process of a TPU-based stretching double-sided adhesive tape according to the present invention comprises the following steps:

[0053] Step 1, preparing the protection component 6: coating 50 parts of FR-B8012-6 on the surface of 50 parts of polyester film to obtain the flame retardant layer 61, then coating 50 parts of SBS polymer modified emulsified asphalt on the surface of 50 parts of polyurethane to obtain the waterproof layer 62, and then bonding the prepared flame retardant layer 61 and waterproof layer 62 together;

[0054] Step 2, preparing the TPU substrate body 5: coating a layer of TPU aqueous solution on the surface of the first silicone release film, and setting the second silicone release film on the side of the TPU layer far from the first silicone release film;

[0055] Step 3, preparing the stretching component 4: fully mixing 45 parts of polyethylene terephthalate, 25 parts of polypropylene, and 30 parts of polyvinyl chloride and pressing them into strips to obtain the required stretching component 4;

[0056] Step 4, preparing the adhesive tape: fully mixing 20 parts of α-cyanoacrylate primer, 30 parts of polyethylene terephthalate, 30 parts of acrylonitrile-butadiene-styrene, and 20 parts of polymethyl methacrylate and passing them through a mold to obtain the required first adhesive tape 3 and second adhesive tape 7;

[0057] Step 5, pressing the double-sided adhesive tape: bonding the obtained release paper 2, first adhesive tape 3, stretching component 4, TPU substrate body 5, protection component 6, and second adhesive tape 7 together.

[0058] Example 4:

[0059] The first adhesive tape 3 and the second adhesive tape 7 are made of the following components: 25 parts of α-cyanoacrylate primer, 25 parts of polyethylene terephthalate, 20 parts of acrylonitrile-butadiene-styrene and 30 parts of polymethyl methacrylate, by weight; the stretching tape 41 is made of the following components: 20 parts of polyethylene terephthalate, 35 parts of polypropylene and 45 parts of polyvinyl chloride, by weight; the flame retardant layer 61 is made of the following components: 55 parts of FR-B8012-6 and 45 parts of polyester film, by weight; the waterproof layer 62 is made of the following components: 60 parts of polyurethane and 40 parts of SBS polymer modified emulsified asphalt, by weight.

[0060] The present invention discloses a preparation process of a TPU substrate stretched double-sided adhesive, comprising the following steps:

[0061] Step 1, preparing a protective component 6: coating 55 parts of FR-B8012-6 on the surface of 45 parts of polyester film to prepare a flame retardant layer 61, and then coating 40 parts of SBS polymer modified emulsified asphalt on the surface of 60 parts of polyurethane to prepare a waterproof layer 62, and then bonding the prepared flame retardant layer 61 and waterproof layer 62 together;

[0062] Step 2, preparing TPU substrate body 5: TPU aqueous solution is coated on the surface of the first silicone oil release film to form a layer, and the second silicone oil release film is set on the side of the TPU layer away from the first silicone oil release film;

[0063] Step 3, preparing the stretching component 4: 20 parts of polyethylene terephthalate, 35 parts of polypropylene and 45 parts of polyvinyl chloride are fully mixed and layered to obtain the desired stretching component 4;

[0064] Step 4, preparing adhesive tape: fully mix 25 parts of α-cyanoacrylate primer, 25 parts of polyethylene terephthalate, 20 parts of acrylonitrile-butadiene-styrene and 30 parts of polymethyl methacrylate, and pass through a mold to prepare the required first adhesive tape 3 and second adhesive tape 7;

[0065] Step 5, laminating double-sided adhesive: bonding the prepared release paper 2, the first adhesive tape 3, the stretching component 4, the TPU substrate body 5, the protective component 6 and the second adhesive tape 7 together.

[0066] Embodiment 5:

[0067] The first adhesive tape 3 and the second adhesive tape 7 are made of the following components: by weight, 40 parts of α-cyanoacrylate base, 20 parts of polyethylene terephthalate, 20 parts of acrylonitrile-butadiene-styrene, and 20 parts of polymethyl methacrylate. The stretching tape 41 is made of the following components: by weight, 45 parts of polyethylene terephthalate, 35 parts of polypropylene, and 20 parts of polyvinyl chloride. The flame retardant layer 61 is made of the following components: by weight, 45 parts of FR-B8012-6 and 55 parts of polyester film. The waterproof layer 62 is made of the following components: by weight, 40 parts of polyurethane and 60 parts of SBS polymer modified emulsified asphalt.

[0068] The preparation process of a TPU-based stretching double-sided adhesive tape according to the present invention includes the following steps:

[0069] Step 1, preparing the protection component 6: coating 45 parts of FR-B8012-6 on the surface of 55 parts of polyester film to obtain the flame retardant layer 61, then coating 60 parts of SBS polymer modified emulsified asphalt on the surface of 40 parts of polyurethane to obtain the waterproof layer 62, and then bonding the prepared flame retardant layer 61 and waterproof layer 62 together;

[0070] Step 2, preparing the TPU substrate body 5: coating a layer of TPU aqueous solution on the surface of the first silicone release film, and setting the second silicone release film on one side of the TPU layer away from the first silicone release film;

[0071] Step 3, preparing the stretching component 4: fully mixing 45 parts of polyethylene terephthalate, 35 parts of polypropylene, and 20 parts of polyvinyl chloride and pressing them into strips to obtain the required stretching component 4;

[0072] Step 4, preparing the adhesive tape: fully mixing 40 parts of α-cyanoacrylate base, 20 parts of polyethylene terephthalate, 20 parts of acrylonitrile-butadiene-styrene, and 20 parts of polymethyl methacrylate and passing them through a mold to obtain the required first adhesive tape 3 and second adhesive tape 7;

[0073] Step 5, pressing the double-sided adhesive tape: bonding the obtained release paper 2, first adhesive tape 3, stretching component 4, TPU substrate body 5, protection component 6, and second adhesive tape 7 together.

[0074] In the present invention, 45 to 55 parts of a flame retardant layer 61 is prepared by coating 45 to 55 parts of FR-B8012-6 on the surface of 45 to 55 parts of a polyester film. Then, a waterproof layer 62 is prepared by coating 40 to 60 parts of SBS polymer-modified emulsified asphalt on the surface of 40 to 60 parts of a polyurethane. Then, the prepared flame retardant layer 61 and waterproof layer 62 are bonded together; a TPU aqueous solution is coated on the surface of a first silicone release film to form a layer, and a second silicone release film is arranged on one side of the TPU layer away from the first silicone release film; 20 to 45 parts of polyethylene terephthalate, 20 to 45 parts of polypropylene, and 20 to 45 parts of polyvinyl chloride are fully mixed and strip-pressed to obtain a required stretching component 4; 20 to 40 parts of an α-cyanoacrylate primer, 20 to 40 parts of polyethylene terephthalate, 20 to 40 parts of acrylonitrile-butadiene-styrene, and 20 to 40 parts of polymethyl methacrylate are fully mixed and formed into a required first adhesive tape 3 and second adhesive tape 7 through a mold; the prepared release paper 2, first adhesive tape 3, stretching component 4, TPU substrate body 5, protective component 6, and second adhesive tape 7 are bonded together.

[0075] The parameters of the prepared double-sided adhesive are as follows:

[0076] Viscosity of side A Holding viscosity Thickness (mm) Viscosity of side B Example 1 75.3 1.31 0.59 75.3 Example 2 70.5 1.24 0.54 70.5 Example 3 85.3 1.86 0.72 85.3 Example 4 79.4 1.42 0.58 79.4 Example 5 88.5 1.88 0.80 88.5

[0077] It can be seen that the viscosity prepared by the formulation of Example 5 is high, the holding viscosity prepared by the formulation of Example 5 is high, and the thickness prepared by the formulation of Example 2 is the smallest.

[0078] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A TPU-based stretched double-sided adhesive tape, comprising a double-sided adhesive tape body (1), characterized in that: The double-sided adhesive body (1) comprises a release paper (2), a first adhesive tape (3), a stretching component (4), a TPU substrate body (5), a protective component (6) and a second adhesive tape (7), wherein the release paper (2), the first adhesive tape (3), the stretching component (4), the TPU substrate body (5), the protective component (6) and the second adhesive tape (7) are arranged in sequence from the outside to the inside.

2. A TPU substrate stretched double-sided adhesive according to claim 1, characterized in that: The top end of the TPU substrate body (5) is connected to the bottom end of the stretching component (4), the top end of the stretching component (4) is adhesively connected to the bottom end of the first adhesive tape (3), the top end of the first adhesive tape (3) is adhesively connected to the bottom end of the release paper (2), the bottom end of the TPU substrate body (5) is connected to the top end of the protective component (6), and the bottom end of the protective component (6) is adhesively connected to the top end of the second adhesive tape (7).

3. A TPU substrate stretched double-sided adhesive according to claim 1, characterized in that: The stretching assembly (4) comprises a stretching belt (41) and a plurality of stretching strips (43); a plurality of stretching grooves (42) are provided on one side of the stretching belt (41); a plurality of through-slots (44) are provided inside the stretching belt (41); and the plurality of through-slots (44) are respectively arranged corresponding to the plurality of stretching strips (43).

4. A TPU substrate stretched double-sided adhesive according to claim 3, characterized in that: The stretching belt (41) is made of polyethylene terephthalate, polypropylene and polyvinyl chloride.

5. The TPU substrate stretched double-sided adhesive according to claim 1, characterized in that: The protection component (6) comprises a flame retardant layer (61) and a waterproof layer (62), and the bottom end of the flame retardant layer (61) is fixedly connected to the top end of the waterproof layer (62).

6. A TPU substrate stretched double-sided adhesive according to claim 5, characterized in that: The top end of the flame retardant layer (61) is fixedly connected to the TPU substrate body (5), and the bottom end of the waterproof layer (62) is fixedly connected to the second adhesive tape (7).

7. The TPU-based stretched double-sided adhesive according to claim 5, characterized in that: The flame retardant layer (61) is made of FR-B8012-6 and polyester film.

8. The TPU-based stretched double-sided adhesive according to claim 5, characterized in that: The waterproof layer (62) is made of polyurethane and SBS polymer modified emulsified asphalt.

9. The TPU substrate stretched double-sided adhesive according to claim 1, characterized in that: The first adhesive tape (3) and the second adhesive tape (7) are made of α-cyanoacrylate primer, polyethylene terephthalate, acrylonitrile-butadiene-styrene and polymethyl methacrylate.

10. A process for preparing a TPU-based stretched double-sided adhesive according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, preparing a protective component (6): coating 45-55 parts of FR-B8012-6 on the surface of 45-55 parts of polyester film to obtain a flame retardant layer (61), and then coating 40-60 parts of SBS polymer modified emulsified asphalt on the surface of 40-60 parts of polyurethane to obtain a waterproof layer (62), and then bonding the prepared flame retardant layer (61) and waterproof layer (62) together; Step 2, preparing a TPU substrate body (5): applying a TPU aqueous solution on the surface of the first silicone oil release film to form a layer, and setting the second silicone oil release film on the side of the TPU layer away from the first silicone oil release film; Step 3, preparing the stretching component (4): thoroughly mix 20-45 parts of polyethylene terephthalate, 20-45 parts of polypropylene and 20-45 parts of polyvinyl chloride to obtain the desired stretching component (4); Step 4, preparing an adhesive tape: thoroughly mixing 20-40 parts of α-cyanoacrylate primer, 20-40 parts of polyethylene terephthalate, 20-40 parts of acrylonitrile-butadiene-styrene and 20-40 parts of polymethyl methacrylate, and passing through a mold to prepare the required first adhesive tape (3) and second adhesive tape (7); Step 5: Laminating the double-sided adhesive tape: bonding the prepared release paper (2), the first adhesive tape (3), the stretching component (4), the TPU substrate body (5), the protective component (6) and the second adhesive tape (7) together.

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