Temperature-resistant and high-adhesion TPU (thermoplastic polyurethane) barrier material, composite waterproof joint strip as well as preparation method and application of composite waterproof joint strip

Abstract

The invention provides a temperature-resistant and high-adhesion TPU (thermoplastic polyurethane) barrier material, a composite waterproof joint strip as well as a preparation method and application of the composite waterproof joint strip, and belongs to the technical field of composite materials. The toughening agent, the nano silicon dioxide and the tackifier are introduced into the high-temperature TPU glue for modification, a TPU barrier material formula with good temperature resistance and excellent adhesion is obtained, then the TPU barrier material formula is organically combined with the TPU hot melt glue which is small in shrinkage rate, soft, excellent in adhesion and resistant to washing in an integrated forming casting machine, and the composite waterproof joint strip is obtained. The composite waterproof joint strip prepared by the invention has the characteristics of high temperature resistance and excellent water resistance, the temperature resistance of the composite waterproof joint strip with the thickness of 0.08 mm can be equivalent to the effect of 0.1 mm of a common product, the weight is reduced by 20%, the composite waterproof joint strip has good washing resistance and water pressure resistance, and the bonding strength of coatings of two layers of windproof and waterproof clothes is high. The composite waterproof joint strip is used for manufacturing light-weight two-layer windproof and waterproof clothes, the wearing experience of consumers is improved, and the composite waterproof joint strip has good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of composite materials, and in particular to a temperature-resistant, high-adhesion TPU barrier material, a composite waterproof sticker, and a preparation method and application thereof. Background Art

[0002] As people's living standards continue to improve, more and more people are pursuing a healthier lifestyle. Outdoor sports have become an effective way for people to get into nature and exercise. Since the outdoor environment is unpredictable, you may encounter rain, high temperatures, or severe cold, so people have higher requirements for outdoor sports clothing. Windproof and waterproof clothing that is windproof, breathable, breathable, warm, and lightweight is deeply loved by outdoor athletes. Among them, lightweight clothing is more comfortable and has a better consumer experience, and has become the main direction of the development of outdoor sports clothing.

[0003] In the prior art, there are usually two ways to manufacture windproof and waterproof clothing: one is to sew the fabrics of the windproof and waterproof clothing together through a sewing machine or similar sewing equipment without pressing the adhesive strips. This type of clothing has poor windproof and waterproof effects and has problems of air leakage and water leakage in a windy and rainy environment for a long time; the second method is to press a waterproof tape on the seam bone position of the first method to achieve the functions of windproof, waterproof and heat preservation.

[0004] The existing composite waterproof tape structure is barrier film + hot melt adhesive. The barrier film is mainly divided into three categories: PU, TPU and PVC. TPU barrier film has advantages in performance and cost and is widely used in the market. The adhesive layer is generally TPU hot melt adhesive and rubber, which has a good bonding effect on two layers of waterproof fabrics PU, hydrophilic PU, PVC, PA, PTFE, and TPE coatings, thereby making the clothes windproof, waterproof and heat-insulating.

[0005] However, the thickness of composite waterproof strips made of TPU barrier film is 0.1mm in the market, and 0.08mm is not the mainstream thickness. The use of 0.08mm thick composite waterproof strips has problems such as narrow fabric applicability, temperature difference resistance, easy breakage of composite waterproof strips at parking positions, and non-waterproofness, which affects the windproof and waterproof functions of windproof and waterproof clothing and brings many inconveniences to consumers. However, the 0.1mm specification of conventional composite waterproof strips cannot well meet the market demand for lightweight clothing. Therefore, there is an urgent need for a new type of composite waterproof strip that can achieve windproof and waterproof functions and reduce the thickness of the composite waterproof strip to meet the market demand for lightweight clothing. Summary of the invention

[0006] The purpose of the present invention is to provide a heat-resistant, high-adhesion TPU barrier material, a composite waterproof strip and a preparation method and application thereof. The prepared composite waterproof strip has the characteristics of high temperature resistance and excellent waterproofness. Its 0.08mm thickness heat resistance performance can match the effect of 0.1mm of ordinary products, and it is 20% lighter.

[0007] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0008] The present invention provides a heat-resistant, high-adhesion TPU barrier material, wherein the heat-resistant, high-adhesion TPU barrier material is composed of the following raw materials in parts by weight:

[0009] 10-50 parts of TPUA glue, 80-120 parts of TPU B glue, 1-8 parts of toughening agent, 1-6 parts of tackifier, 1-8 parts of nano-silica masterbatch, 0.1-1 parts of antioxidant, and 0.3-1 parts of ultraviolet absorber.

[0010] Preferably, the TPU A glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane, and the hardness of the TPU A glue is 85-98A, the melt mass flow rate is 3-20g / 10 minutes, and the softening point is 180°C-200°C.

[0011] Preferably, the TPU B glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane; the TPU B glue has a hardness of 55D to 75D, a melt mass flow rate of 4 to 25g / 10 minutes, and a softening point of 200°C to 230°C.

[0012] Preferably, the toughening agent is one or two of modified POE and modified POM; the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 215, and antioxidant TPP; the ultraviolet absorber is one or more of ultraviolet absorber UV328, ultraviolet absorber UV531, ultraviolet absorber UV5411, or ultraviolet absorber UV329.

[0013] Preferably, the tackifier is composed of the following raw materials in parts by weight: 50-70 parts of TPU hot melt adhesive, 0.5-5 parts of coupling agent, and 40-60 parts of talc; the TPU hot melt adhesive is one or two of polyester polyurethane and polyether polyurethane; the coupling agent is one or two of γ-glycidyloxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, γ-aminoethylaminopropyltrimethoxysilane, vinyltrimethoxysilane, bis(dioctylpyrophosphate)ethylene titanate, and isopropyltri(dioctylpyrophosphate)titanate.

[0014] The present invention also provides a composite waterproof strip prepared by utilizing the above-mentioned heat-resistant, high-adhesion TPU barrier material. The composite waterproof strip is prepared by a two-layer co-extrusion one-piece molding method of the heat-resistant, high-adhesion TPU barrier material and TPU hot melt adhesive.

[0015] The present invention also provides a method for preparing a composite waterproof sticker, comprising the following steps:

[0016] (1) Preparation of tackifier: TPU hot melt adhesive, coupling agent and talc are mixed evenly, cast by a twin-screw extruder at an extruder temperature of 160° C., cooled, granulated, dried, and circulated to obtain a tackifier;

[0017] (2) Preparation of heat-resistant, high-adhesion TPU barrier material: TPUA glue, TPU B glue, toughening agent, tackifier, nano-silica masterbatch, antioxidant, and ultraviolet absorber are mixed evenly and dried;

[0018] (3) The TPU barrier material and the TPU hot melt adhesive are extruded through a two-layer co-extrusion one-piece casting machine, and the TPU hot melt adhesive surface is simultaneously compounded with the matte BOPP. The matte BOPP is separated after being left for 72 hours, and then cut by a shearing machine to obtain a composite waterproof strip.

[0019] Preferably, in step (2), the drying temperature is 80-100° C. and the drying time is 2-5 h.

[0020] Preferably, the parameters of the two-layer co-extrusion integral molding casting machine in step (3) are:

[0021] TPU barrier material extruder: extruder temperature is 215-240℃; filter temperature is 235-240℃; die temperature is 235℃, and the speed is set to 220rpm;

[0022] TPU hot melt adhesive extruder: extruder temperature is 150-170℃; filter temperature is 165-170℃; die temperature is 165℃, and the speed is set to 220rpm;

[0023] TPU barrier material: TPU hot melt adhesive distribution ratio: 50:50;

[0024] The thickness of the composite waterproof sticker is 0.06-0.12 mm.

[0025] The present invention also provides an application of a composite waterproof sticker in the preparation of windproof and waterproof products.

[0026] The beneficial effects of the present invention compared with the prior art are:

[0027] The present invention introduces a toughening agent, nano-silicon dioxide, and a tackifier into the high-temperature TPU glue for modification to obtain a TPU barrier material formula with good temperature resistance and excellent adhesion, and then organically combines it with a TPU hot melt adhesive with small shrinkage, softness, excellent adhesion, and water-washing resistance in an integrated molding casting machine to obtain a composite waterproof sticker. The composite waterproof sticker prepared by the present invention has the characteristics of high temperature resistance and excellent waterproofness. Its 0.08mm thickness temperature resistance can match the effect of 0.1mm of ordinary products, is 20% lighter, has good water-washing resistance and water pressure resistance, and has a large coating adhesion strength for two-layer windproof and waterproof clothing. The composite waterproof sticker is used in the manufacture of lightweight two-layer windproof and waterproof clothing to improve consumers' wearing experience and has a good application prospect. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0029] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0030] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0031] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to the skilled artisan. The present invention description and examples are exemplary only.

[0032] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0033] In one aspect, the present invention provides a heat-resistant, high-adhesion TPU barrier material, wherein the heat-resistant, high-adhesion TPU barrier material is composed of the following raw materials in parts by weight:

[0034] 10-50 parts of TPUA glue, 80-120 parts of TPU B glue, 1-8 parts of toughening agent, 1-6 parts of tackifier, 1-8 parts of nano-silica masterbatch, 0.1-1 parts of antioxidant, and 0.3-1 parts of ultraviolet absorber.

[0035] Preferably, the TPU A glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane, and more preferably one or two of polyester polyurethane and polyether polyurethane.

[0036] Preferably, the TPUA glue has a hardness of 85-98A, a melt mass flow rate of 3-20g / 10min, and a softening point of 180°C-200°C, more preferably a hardness of 90-98A, a melt mass flow rate of 3-10g / 10min, and a softening point of 190°C-200°C.

[0037] Preferably, the TPU B glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane, and more preferably one or two of polyester polyurethane and polyether polyurethane.

[0038] Preferably, the TPU B glue has a hardness of 55D-75D, a melt mass flow rate of 4-25g / 10min, and a softening point of 200°C-230°C, and more preferably a hardness of 60D-75D, a melt mass flow rate of 4-15g / 10min, and a softening point of 205°C-225°C.

[0039] Preferably, the toughening agent is one or both of modified POE and modified POM, the molecular weight of the toughening agent is greater than 600,000, and the melt mass flow rate is 0.5-2 g / 10 minutes.

[0040] The antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 215, and antioxidant TPP, and more preferably one or two of antioxidant 1010 and antioxidant 1076.

[0041] The ultraviolet absorber is one or more of ultraviolet absorber UV328, ultraviolet absorber UV531, ultraviolet absorber UV5411 or ultraviolet absorber UV329, and more preferably one or two of ultraviolet absorber UV328 and ultraviolet absorber UV5411.

[0042] Preferably, the mesh size of the nano-silicon dioxide masterbatch is 1-100 nm, the content is 10-13%, and the carrier is TPU.

[0043] Preferably, the tackifier is composed of the following raw materials in parts by weight: 50-70 parts of TPU hot melt adhesive, 0.5-5 parts of coupling agent, and 40-60 parts of talc;

[0044] Preferably, the TPU hot melt adhesive is one or both of polyester polyurethane and polyether polyurethane, with a melt mass flow rate of 10-20 g / 10 minutes and a softening point of 120° C.-150° C.

[0045] The coupling agent is one or two of γ-glycidyloxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, γ-aminoethylaminopropyltrimethoxysilane, vinyltrimethoxysilane, bis(dioctylpyrophosphate)ethylene titanate, and isopropyltri(dioctylpyrophosphate)titanate, and more preferably one or two of vinyltrimethoxysilane, bis(dioctylpyrophosphate)ethylene titanate, and isopropyltri(dioctylpyrophosphate)titanate.

[0046] The mesh number of the talc powder is 400-1200 meshes.

[0047] Another aspect of the present invention provides a method for preparing a composite waterproof sticker, the specific steps of which are as follows:

[0048] The TPU barrier material and TPU hot melt adhesive are extruded through a two-layer co-extrusion one-piece casting machine, and the TPU hot melt adhesive surface is compounded with matte BOPP at the same time. The matte BOPP is separated after being left for 72 hours, and then cut by a shearing machine to obtain a composite waterproof strip.

[0049] The temperature settings of the two-layer co-extrusion one-piece casting machine are as follows:

[0050] TPU barrier material extruder: extruder temperature is 215-240°C; filter temperature is 235-240°C; die temperature is 235°C, and the speed is set to 220rpm.

[0051] TPU hot melt adhesive extruder: extruder temperature is 150-170°C; filter temperature is 165-170°C; die temperature is 165°C, and the speed is set to 220rpm.

[0052] TPU barrier material: TPU hot melt adhesive distribution ratio: 50:50.

[0053] Example 1

[0054] In Example 1 of the present invention, a composite waterproof sticker is prepared, and the specific steps are as follows:

[0055] (1) Preparation of tackifier: 60 parts of TPU hot melt adhesive (polyester polyurethane, softening point 130° C., melt mass flow rate 12 g / 10 min), 1 part of vinyl trimethoxysilane, 0.5 parts of bis(dioctyloxypyrophosphate)ethylene titanate, and 40 parts of 1000 mesh talc were mixed evenly, cast on a twin-screw extruder at an extruder temperature of 160° C., cooled, granulated, and dried, and the mixture was cycled twice to obtain a tackifier;

[0056] (2) Preparation of heat-resistant and high-adhesion TPU barrier material: 45 parts of polyester polyurethane with a hardness of 90A, a melt mass flow rate of 8g / 10min, and a softening point of 195°C, 105 parts of polyester polyurethane with a hardness of 64D, a melt mass flow rate of 12g / 10min, and a softening point of 210°C, 3 parts of modified POE, 2 parts of modified POM, 5 parts of tackifier, 100nm, content of 13%, 6 parts of nano-silica masterbatch of TPU carrier, 0.3 parts of antioxidant 1010, 0.4 parts of antioxidant 1076, and 0.5 parts of ultraviolet absorber UV531 were mixed evenly, and dried at 90°C for 3 hours in a drying equipment to obtain a heat-resistant and high-adhesion TPU barrier material;

[0057] (3) The TPU barrier material and the TPU hot melt adhesive are extruded through a two-layer co-extrusion one-piece casting machine, and the TPU hot melt adhesive surface is simultaneously compounded with the matte BOPP. The matte BOPP is separated after being left for 72 hours, and then cut by a shearing machine to obtain a composite waterproof strip.

[0058] The temperature settings of the two-layer co-extrusion one-piece casting machine are as follows:

[0059] TPU barrier material extruder: extruder temperature is 215-235°C; filter temperature is 230-235°C; die temperature is 235°C, and the speed is set to 220rpm.

[0060] TPU hot melt adhesive extruder: extruder temperature is 150-170°C; filter temperature is 165-170°C; die temperature is 165°C, and the speed is set to 220rpm.

[0061] TPU barrier material: TPU hot melt adhesive distribution ratio: 50:50.

[0062] Example 2

[0063] In Example 2 of the present invention, a composite waterproof sticker is prepared, and the specific steps are as follows:

[0064] (1) Preparation of tackifier: 50 parts of TPU hot melt adhesive (polyester polyurethane), 1 part of γ-glycidyloxypropyl trimethoxysilane, 1 part of 3-aminopropyl triethoxysilane, and 50 parts of 1000 mesh talc were mixed evenly, and cast on a twin-screw extruder at an extruder temperature of 160° C., and cooled, granulated, and dried for 2 cycles to obtain a tackifier;

[0065] (2) Preparation of heat-resistant and high-adhesion TPU barrier material: 50 parts of polyester polyurethane with a hardness of 85A, a melt mass flow rate of 20g / 10min, and a softening point of 180°C, 100 parts of polyester polyurethane with a hardness of 75D, a melt mass flow rate of 25g / 10min, and a softening point of 200°C, 4 parts of modified POE, 4 parts of modified POM, 5 parts of tackifier, 100nm, 10% content, 8 parts of nano-silica masterbatch of TPU carrier, 0.2 parts of antioxidant 1010, 0.2 parts of antioxidant 1076, 0.2 parts of antioxidant 168, 0.2 parts of ultraviolet absorber UV531, 0.2 parts of ultraviolet absorber UV5411, and 0.2 parts of ultraviolet absorber UV329 are mixed evenly, and dried at 90°C for 3 hours in a drying equipment to obtain a heat-resistant and high-adhesion TPU barrier material;

[0066] (3) The TPU barrier material and the TPU hot melt adhesive are extruded through a two-layer co-extrusion one-piece casting machine, and the TPU hot melt adhesive surface is simultaneously compounded with the matte BOPP. The matte BOPP is separated after being left for 72 hours, and then cut by a shearing machine to obtain a composite waterproof strip.

[0067] The temperature settings of the two-layer co-extrusion one-piece casting machine are as follows:

[0068] TPU barrier material extruder: extruder temperature is 215-240°C; filter temperature is 235-240°C; die temperature is 235°C, and the speed is set to 220rpm.

[0069] TPU hot melt adhesive extruder: extruder temperature is 150-170°C; filter temperature is 165-170°C; die temperature is 165°C, and the speed is set to 220rpm.

[0070] TPU barrier material: TPU hot melt adhesive distribution ratio: 50:50.

[0071] Test Example 1

[0072] In the test example 1 of the present invention, the performance of the composite waterproof sticker prepared in Example 1 and the ordinary waterproof sticker were measured by taking the ordinary waterproof sticker 1 and the ordinary waterproof sticker 2 on the market as the control, and the test method was as follows:

[0073] 1) The composite waterproof sticker is washable at a constant speed of 10m / min (cross bone position, two stop positions): Washing is in accordance with ISO 6330 requirements, washed in a washing machine at 40℃ for 20 times, each time for 60 minutes, and the hydrostatic pressure is tested at 4000mmH2O / 2min in accordance with ISO811 requirements.

[0074] 2) Temperature resistance test of composite waterproof tape: 18 layers of cross-bone position, two stop positions, washing according to ISO 6330 requirements, washing in a washing machine at 40℃ for 20 times, each time for 60 minutes, and the hydrostatic pressure is tested according to ISO811 requirements at 4000mmH2O / 2min.

[0075] 3) The composite waterproof sticker is bonded with TPU barrier film and TPU hot melt adhesive.

[0076] 4) Rheological test of composite waterproofing strips: according to ISO 6721-1:2019, flat plate shear rheology.

[0077] Table 1 Washing resistance results of composite waterproof stickers and common composite waterproof stickers in Example 1

[0078]

[0079]

[0080] Table 2 Temperature resistance results of the composite waterproof sticker of Example 1 and the common composite waterproof sticker

[0081]

[0082] Table 3 Test results of the composite waterproof sticker of Example 1 and the common composite waterproof sticker

[0083]

[0084]

[0085] Table 4 Rheological test results of prepared composite waterproof strips and ordinary composite waterproof strips

[0086] Tape / Item Modulus 25℃, MPa <![CDATA[Viscous flow temperature T f , °C]]> Ordinary composite waterproof sticker (0.08mm) 24 175 Ordinary composite waterproof strip (0.1mm) 25.2 178 Example 1 (0.08 mm) 26.3 200

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A temperature-resistant, high-adhesion TPU barrier material, characterized in that: The temperature-resistant, high-adhesion TPU barrier material is composed of the following raw materials in parts by weight: 10-50 parts of TPUA glue, 80-120 parts of TPU B glue, 1-8 parts of toughening agent, 1-6 parts of tackifier, 1-8 parts of nano-silica masterbatch, 0.1-1 parts of antioxidant, and 0.3-1 parts of ultraviolet absorber.

2. The heat-resistant, high-adhesion TPU barrier material according to claim 1, characterized in that: The TPUA glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane. The TPUA glue has a hardness of 85 to 98A, a melt mass flow rate of 3 to 20 g / 10 minutes, and a softening point of 180° C. to 200° C.

3. The heat-resistant, high-adhesion TPU barrier material according to claim 1, characterized in that: The TPU B glue is one or two of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane; the hardness of the TPU B glue is 55D-75D, the melt mass flow rate is 4-25g / 10 minutes, and the softening point is 200°C-230°C.

4. The heat-resistant, high-adhesion TPU barrier material according to claim 1, characterized in that: The toughening agent is one or two of modified POE and modified POM; the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 215, and antioxidant TPP; the ultraviolet absorber is one or more of ultraviolet absorber UV328, ultraviolet absorber UV531, ultraviolet absorber UV5411, or ultraviolet absorber UV329.

5. The heat-resistant, high-adhesion TPU barrier material according to claim 1, characterized in that: The tackifier is composed of the following raw materials in parts by weight: 50-70 parts of TPU hot melt adhesive, 0.5-5 parts of coupling agent, and 40-60 parts of talc; the TPU hot melt adhesive is one or two of polyester polyurethane and polyether polyurethane; the coupling agent is one or two of γ-glycidyloxypropyltrimethoxysilane, 3-aminopropyltriethoxysilane, γ-aminoethylaminopropyltrimethoxysilane, vinyltrimethoxysilane, bis(dioctylpyrophosphate)ethylene titanate, and isopropyltri(dioctylpyrophosphate)titanate.

6. A composite waterproof sticker made of the heat-resistant, high-adhesion TPU barrier material according to any one of claims 1 to 5, characterized in that: The composite waterproof sticker is prepared by a two-layer co-extrusion one-piece molding method using the temperature-resistant, high-adhesion TPU barrier material and TPU hot melt adhesive.

7. A method for preparing the composite waterproof sticker according to claim 6, characterized in that: The steps include: (1) Preparation of tackifier: TPU hot melt adhesive, coupling agent and talc are mixed evenly, cast by a twin-screw extruder at an extruder temperature of 160° C., cooled, granulated, dried, and circulated to obtain a tackifier; (2) Preparation of heat-resistant, high-adhesion TPU barrier material: TPUA glue, TPU B glue, toughening agent, tackifier, nano-silica masterbatch, antioxidant, and ultraviolet absorber are mixed evenly and dried; (3) The TPU barrier material and the TPU hot melt adhesive are extruded through a two-layer co-extrusion one-piece casting machine, and the TPU hot melt adhesive surface is simultaneously compounded with the matte BOPP. The matte BOPP is separated after being left for 72 hours, and then cut by a shearing machine to obtain a composite waterproof strip.

8. The method for preparing the composite waterproof sticker according to claim 7, characterized in that: In step (2), the drying temperature is 80-100° C. and the drying time is 2-5 hours.

9. The method for preparing the composite waterproof sticker according to claim 7, characterized in that: The parameters of the two-layer co-extrusion integrated molding casting machine in step (3) are: TPU barrier material extruder: extruder temperature is 215-240℃; filter temperature is 235-240℃; die temperature is 235℃, and the speed is set to 220rpm; TPU hot melt adhesive extruder: extruder temperature is 150-170℃; filter temperature is 165-170℃; die temperature is 165℃, and the speed is set to 220rpm; TPU barrier material: TPU hot melt adhesive distribution ratio: 50:50; The thickness of the composite waterproof sticker is 0.06-0.12 mm.

10. Use of the composite waterproof sticker according to claim 6 or the composite waterproof sticker prepared by the preparation method of the composite waterproof sticker according to any one of claims 7 to 9 in preparing windproof and waterproof products.

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