Skin-care heat-insulating film car cover adhesive tape and preparation method thereof

Abstract

The skin-care heat-insulating film car cover adhesive tape comprises a release layer, a mounting adhesive layer, a functional layer, a structural adhesive layer, a base material layer, a heat repairing layer and a protective layer which are sequentially stacked, the functional layer comprises a TPU substrate layer, a transition layer is arranged on the TPU substrate layer, at least three composite layers are arranged on the side, away from the TPU substrate layer, of the transition layer, each composite layer comprises a reflecting layer and a dielectric layer, and the dielectric layer is located on the side, away from the transition layer, of the reflecting layer; the transition layer is made of chromium or titanium; the reflecting layer is made of at least one of gold, silver, titanium, nickel, chromium and indium tin oxide; and the material of the dielectric layer is at least one of SiO2, Al2O3, TiO2 and ZnO. According to the invention, the polycarbonate type TPU base material with high permeability and high chemical and mechanical resistance is matched with the high-weather-resistance and high-heat-insulation functional layer to obtain the skin-care, high-heat-insulation, impact-resistant, high-weather-resistance and explosion-proof automobile cover adhesive tape, and the automobile cover adhesive tape is suitable for automobile sunroofs pursuing safety, explosion-proof performance, high heat insulation and high weather resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of car cover materials, and particularly relates to a skin-protection and heat-insulating film car cover tape and a preparation method thereof. Background Art

[0002] Sunroofs have become a standard feature in modern cars, especially in the era of rapid growth in new energy vehicles. Panoramic sunroofs are a must-have for high-end vehicles. In the summer, large sunroofs can bring brightness and a sense of spaciousness to the interior. However, when the sun shines on the roof, the temperature inside the vehicle rises rapidly, scorching exposed skin. Ultraviolet radiation can also cause pigmentation and sunburn. Furthermore, if objects fall from high altitudes, shattering the sunroof can easily lead to injury.

[0003] The difference between UV400 and 99% UV blocking rates on the current market is this: UV400 refers to blocking UV rays below 400nm, while 99% refers to a 99% blocking rate. UVB blocking primarily refers to UVB and UVA. UVB refers to UV rays in the 280nm-315nm range, which are completely blocked. UVA refers to UV rays in the 315nm-400nm range, and most films only block up to 360nm, ignoring the 380nm-400nm range. Therefore, the 1% that cannot be blocked refers to the high-wavelength UVA band of 360nm-400nm. However, research shows that high-wavelength UV rays in the 360nm-400nm range are the primary cause of skin tanning.

[0004] The existing skylight insulation film has a structure from bottom to top of 130μm PET silicone release film, 55μm acrylic glue + nano insulation material, 150μm TPU film, 12μm repair layer, and 50μm PET protective film; the preparation process is as follows: in the first step, functional insulation glue is coated and installed on the PET silicone release film, with a dry glue thickness of 15-60μm, and dried at 100-130℃ for 2-5 minutes, and then the glue surface is compounded with the TPU surface; in the second step, a stain-resistant self-repairing polyurethane coating is coated on the surface of the TPU layer, with a dry glue thickness of 3-15μm, and dried at 85-150℃ for 2-5 minutes, and then compounded with the protective film, and placed at 40-80℃ for 48-96h. After the self-repairing polyurethane resin is fully matured, the skylight insulation film is obtained.

[0005] The aforementioned sunroof insulation film has the following drawbacks: adding insulation materials to the installation adhesive can affect the adhesiveness, potentially leading to loss of adhesion over time; this structured sunroof film can fog up on rainy days due to moisture entering the adhesive layer, affecting vision; the insulation principle of this structure uses nanomaterials to absorb solar heat to achieve insulation, but this heat absorption principle can cause uneven heating of the glass, increasing the risk of glass shattering. This is especially true in the summer when the air conditioning is frequently used in cars, as temperature fluctuations cause uneven heating of the glass, increasing the likelihood of shattering. Furthermore, when infrared heat energy reaches absorption saturation, secondary infrared radiation is transmitted into the vehicle, negating the insulation effect.

[0006] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0007] The object of the present invention is to provide a skin-care heat-insulating film car cover tape and a preparation method thereof, wherein the car cover tape has excellent repairability, explosion-proofness, UV blocking property, high heat insulation property and high weather resistance.

[0008] In order to achieve the above object, a specific embodiment of the present invention provides the following technical solutions:

[0009] A skin-protection heat-insulating film car cover tape, comprising a release layer, a mounting adhesive layer, a functional layer, a structural adhesive layer, a base material layer, a heat-repairing layer, and a protective layer stacked in sequence;

[0010] The functional layer includes a TPU base layer, a transition layer is provided on the TPU base layer, and at least three composite layers are provided on the side of the transition layer facing away from the TPU base layer. The composite layer includes a reflective layer and a dielectric layer, and the dielectric layer is located on the side of the reflective layer facing away from the transition layer.

[0011] The material of the transition layer is chromium or titanium;

[0012] The material of the reflective layer is at least one of gold, silver, titanium, nickel, chromium, and indium tin oxide;

[0013] The material of the dielectric layer is at least one of SiO2, Al2O3, TiO2, and ZnO.

[0014] In one or more embodiments of the present invention, in the functional layer, the reflective layers in at least two composite layers are made of different materials.

[0015] In one or more embodiments of the present invention, the thickness of the transition layer is 10 nm-50 nm.

[0016] In one or more embodiments of the present invention, the thickness of the reflective layer is 5 nm-10 nm.

[0017] In one or more embodiments of the present invention, the dielectric layer has a thickness of 3 nm to 5 nm.

[0018] In one or more embodiments of the present invention, the TPU base layer has a thickness of 20 μm-50 μm.

[0019] In one or more embodiments of the present invention, the surface of the TPU base layer is treated by low-temperature plasma, the reaction gas of the low-temperature plasma is at least one of argon and oxygen, and the treatment conditions are: power 50W-200W, time 1min-5min.

[0020] In one or more embodiments of the present invention, the release layer is a PET release film layer with a thickness of 75 μm-92 μm;

[0021] And / or, the mounting adhesive layer is a UV400 acrylic adhesive layer with a thickness of 30μm-50μm

[0022] And / or, the structural adhesive layer is a polyurethane adhesive layer with a thickness of 5 μm-10 μm;

[0023] And / or, the substrate layer is a polycarbonate TPU substrate layer with a thickness of 100 μm-200 μm;

[0024] And / or, the thermal repair layer is a polyurethane layer with a thickness of 15 μm-25 μm.

[0025] And / or, the protective layer is a PET hardened film layer with a thickness of 36 μm-50 μm.

[0026] Another specific embodiment of the present invention provides a technical solution as follows:

[0027] A method for preparing a skin-protection and heat-insulating film car cover tape comprises the following steps:

[0028] Taking a base material layer, compounding a structural adhesive layer on the surface of the base material layer, and compounding a functional layer on the surface of the structural adhesive layer to obtain a semi-finished product 1;

[0029] Taking the release layer and compounding the installation adhesive layer on the release layer, compounding the installation adhesive layer on the functional layer to obtain a second semi-finished product;

[0030] A thermal repair layer is compounded on the surface of the base material layer away from the structural adhesive layer, and a protective layer is compounded on the surface of the thermal repair layer to obtain a skin-protection and heat-insulating film car cover tape.

[0031] In one or more embodiments of the present invention, the functional layer is prepared as follows:

[0032] The TPU substrate layer treated with low-temperature plasma is treated under the following conditions: using at least one of argon and oxygen as a reaction gas and treating the surface of the TPU substrate layer at a power of 50W-200W for 1min-5min;

[0033] A transition layer is plated on the surface of the TPU base layer;

[0034] At least three composite layers are plated on the surface of the transition layer, and the composite layers include a reflective layer and a dielectric layer arranged on the reflective layer.

[0035] Compared with the existing technology, the present invention selects a polycarbonate TPU film with high transmittance, high chemical resistance and mechanical properties as the base material. At the same time, by arranging a multi-layer composite layer on the polycarbonate TPU film and using UV400 acrylic adhesive and polyurethane adhesive to effectively bond each layer structure, a sunroof car cover tape with skin care, high heat insulation, impact resistance, scratch repair, metal aging resistance, and high weather resistance and explosion-proof performance is obtained. The obtained car cover tape has excellent performance and a long service life, and the service life can reach more than 10 years.

[0036] The car cover tape of the present invention achieves full UV400 blocking to prevent ultraviolet radiation invasion to achieve the purpose of skin care, and can prevent the aging of car interiors and leather seats; the safety is improved by setting the thickness, and a protective barrier is cast for the sunroof, which can protect the driving safety of people in the car; the high thermal insulation is also conducive to reducing the energy consumption of air conditioning in the car and reducing carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is a schematic structural diagram of a skin-protection and heat-insulating film car cover tape according to one embodiment of the present invention;

[0039] Figure 2 Schematic diagram of the structure of the functional layer in one embodiment of the present invention.

[0040] Description of main reference numerals:

[0041] 1. Release layer; 2. Installation adhesive layer; 3. Functional layer; 31. TPU base layer; 32. Transition layer; 33. Reflective layer; 34. Dielectric layer; 4. Structural adhesive layer; 5. Base material layer; 6. Thermal repair layer; 7. Protective layer. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0043] A specific embodiment of the present invention provides a skin care heat insulation film car clothing tape, such as Figure 1 As shown, it includes a release layer 1, a mounting adhesive layer 2, a functional layer 3, a structural adhesive layer 4, a substrate layer 5, a thermal repair layer 6 and a protective layer 7 stacked in sequence; wherein the functional layer 3 includes a TPU base layer 31, a transition layer 32 is provided on the TPU base layer 31, and at least three composite layers are provided on the side of the transition layer 32 away from the TPU base layer 31, the composite layer includes a reflective layer 33 and a dielectric layer 34, and the dielectric layer 34 is located on the side of the reflective layer 33 away from the transition layer 32; the material of the transition layer 32 is chromium or titanium; the material of the reflective layer 33 is at least one of gold, silver, titanium, nickel, chromium, and indium tin oxide; the material of the dielectric layer 34 is at least one of SiO2, Al2O3, TiO2, and ZnO.

[0044] Specifically, TPU (thermoplastic polyurethane elastomer) has excellent tensile and weather resistance. Choosing TPU as the base layer can give the car cover tape an explosion-proof function. Preferably, the TPU base layer is a polycarbonate TPU film with a tensile strength greater than 40Mpa, a substrate elongation at break ≥400%, a substrate transmittance greater than 93%, and a UV blocking ≥99%. The specific model can be Wanhua WHT-7190. It has excellent transparency, weather resistance, aging resistance, oil resistance, hydrolysis resistance, high temperature resistance, UV resistance, and excellent mechanical properties, which can more effectively improve the weather resistance and explosion-proof effect of the car cover tape.

[0045] The reflective layer can effectively reflect sunlight and improve the heat insulation effect of the car cover tape. The thermal repair layer can also improve the wear resistance and scratch resistance of the car cover tape, which helps to improve the heat insulation, sun protection and safety of the car cover tape.

[0046] The transition layer is located between the TPU base layer and the reflective layer. The transition layer material is an active metal, which can form chemical bonds with the functional groups on the surface of the TPU base layer to improve the adhesion of the reflective layer on the TPU base layer.

[0047] The dielectric layer material is an inert metal oxide, which can improve the weather resistance of the car cover tape, block water vapor and oxygen, and prevent the reflective layer from wear or oxidation.

[0048] Furthermore, within the functional layer, the reflective layers in at least two composite layers are made of different materials, and preferably all composite layers are made of different materials. By selecting different materials for the reflective layers, the multi-layer design can adjust the transmittance of light of different wavelengths, achieving a heat-insulating effect and effectively improving the sun-protection and heat-insulating properties of the car cover tape.

[0049] Furthermore, the TPU base layer has a thickness of 20μm-50μm, the transition layer has a thickness of 10nm-50nm, the reflective layer has a thickness of 5nm-10nm, the dielectric layer has a thickness of 3nm-5nm, and the combined thickness of the transition layer and composite layer is 35nm-95nm. The combined thickness of all reflective layers in the composite layer is less than 150nm to avoid metal whiskering during bending. This optimal thickness also ensures the car cover tape has excellent heat insulation, sun protection, and explosion-proof properties.

[0050] Furthermore, the surface of the TPU substrate layer is treated with low-temperature plasma, using at least one of argon and oxygen as the reaction gas. The treatment conditions are: power of 50W-200W, and time of 1-5 minutes. The low-temperature plasma bombards the surface of the TPU substrate layer, cleaning and removing impurities, increasing the surface energy and generating active groups (such as -OH and -COOH). It also increases the roughness of the TPU substrate layer, which helps improve the adhesion of the transition layer to the TPU substrate layer.

[0051] Furthermore, the release layer is a PET release film with a thickness of 75μm-92μm, a release force of 40-60g / inch, and a residue of >85%. The specific model can be Wanrun HT4 release film.

[0052] Furthermore, the mounting adhesive layer is a UV400 acrylic adhesive layer with a thickness of 30μm-50μm. Acrylic adhesive offers excellent water resistance, high bonding strength, and weather resistance. Choosing acrylic adhesive in combination with a UV400 blocker as the mounting adhesive layer can improve the UV blocking rate of the car cover tape on the sunroof glass, achieving a protective film effect. Specific acrylic adhesives include Ashland 951059 or Henkel 8087. The acrylic adhesive layer is enhanced with a bis-ethylhexyloxyphenol methoxyphenyl triazine UV400 blocker to fully block UV rays in the 280nm-400nm range, protecting the skin and extending the service life of the vehicle interior. A specific model, Lotte Chemical B-70, is recommended. The UV400 blocker is added to the acrylic adhesive layer at a level of 3%-6% by weight of the acrylic adhesive.

[0053] Furthermore, the structural adhesive layer is a polyurethane adhesive layer with a thickness of 5μm-10μm. The polyurethane structural adhesive is mainly composed of prepolymer, chain extender, filler, catalyst, stabilizer and solvent. It has excellent adhesion, sealing and weather resistance, and can effectively bond the functional layer and the substrate layer. The specific model can be Bangu UC-3700-04.

[0054] Further, the substrate layer is a polycarbonate TPU substrate layer, and the thickness is 100-200pm.

[0055] Further, the thermal repair layer is a polyurethane layer, which is mainly prepared from isocyanate and polyol, chain extender, catalyst, anti-staining additive, solvent, weather-resistant material and wetting aid, and has the effect of repairing scratches or slight damage by heating, so as to improve the repair convenience of the car cover tape and ensure that the car cover tape continuously plays the performance of sun protection, heat insulation and explosion prevention. The specific material of the thermal repair layer can be selected from Keshu coating 5599-70045.

[0056] Further, the protective layer is a PET hardening film layer, and the thickness is 36-50pm. The protective layer can increase the gloss and flatness of the surface of the tape. The specific PET hardening film can be selected from Kangdixin KHZ828.

[0057] Another specific embodiment of the present application provides a preparation method of the skin care and heat insulation film car cover tape, which comprises steps 1-4.

[0058] Step 1, preparing the functional layer: taking the TPU substrate layer treated by low-temperature plasma, the low-temperature plasma treatment conditions are that at least one of argon and oxygen is used as the reaction gas, and the surface of the TPU substrate layer is treated at a power of 50-200W for 1-5min; the transition layer is plated on the surface of the TPU substrate layer; at least three composite layers are plated on the surface of the transition layer, and the composite layers include the reflective layer and the dielectric layer arranged on the reflective layer.

[0059] Step 2, taking the substrate layer, compounding the structural adhesive layer on the surface of the substrate layer, and compounding the functional layer on the surface of the structural adhesive layer to obtain semi-finished product one.

[0060] Specifically, the polyurethane adhesive is directly coated on the surface of the substrate layer through a slit or a micro-concave, and the composite layer in the functional layer is attached to the polyurethane adhesive. The polyurethane adhesive in the structural adhesive layer is cured at 40-50℃ for 24-48h.

[0061] Step 3, taking the release layer and compounding the mounting adhesive layer on the release layer, and compounding the mounting adhesive layer on the functional layer to obtain semi-finished product two.

[0062] Specifically, after the semi-finished product one is cured, the acrylic adhesive is directly coated on the PET release film through a slit or a micro-concave, and then the TPU substrate layer in the functional layer is attached to the functional layer to be compounded with the functional layer. The acrylic adhesive is cured at room temperature for 24-48h.

[0063] Step 4, compounding the thermal repair layer on the surface of the substrate layer away from the structural adhesive layer, and compounding the protective layer on the surface of the thermal repair layer to obtain the skin care and heat insulation film car cover tape.

[0064] Specifically, polyurethane adhesive is directly coated on the surface of the substrate layer through the slits or micro-concave, and then the PET hardening film is laminated. The polyurethane adhesive of the heat repair layer is cured at 50°C for 48h-72h.

[0065] The following specific examples further illustrate the present invention in detail.

[0066] Sources of reagents used in the present invention: polycarbonate TPU film, Wanhua WHT-7190; polyurethane adhesive for thermal repair layer, Kashu Coating 5599-70045; acrylic adhesive, Asialand 951059, to which 3% by mass of UV400 barrier agent, Lotte Chemical B-70, is added; polyurethane adhesive for structural adhesive layer, Bangu UC-3700-04; PET release film, Wanrun HT4 release film; PET hardened film, Kangdexin KHZ828.

[0067] Example 1

[0068] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 1.

[0069] Table 1 Material and thickness of each layer of skin care insulation film car cover tape

[0070]

[0071]

[0072] During preparation, a first polycarbonate TPU film was taken, and the surface of the first polycarbonate TPU film was bombarded with oxygen at a power of 50W for 1 minute. Then, a chromium layer, a gold layer, an aluminum oxide layer, a titanium layer, a silicon dioxide layer, an indium tin oxide layer, and a titanium dioxide layer were sputtered on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0073] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the titanium dioxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0074] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0075] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0076] Example 2

[0077] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 2.

[0078] Table 2 Material and thickness of each layer of skin care insulation film car cover tape

[0079]

[0080] During preparation, take the first polycarbonate TPU film, use oxygen to bombard the surface of the first polycarbonate TPU film at a power of 50W for 1 minute, and then sputter a titanium layer, a silver layer, a zinc oxide layer, a nickel layer, an aluminum oxide layer, a chromium layer, and a silicon dioxide layer on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0081] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the silicon dioxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0082] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0083] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0084] Example 3

[0085] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 3.

[0086] Table 3 Material and thickness of each layer of skin care insulation film car cover tape

[0087]

[0088]

[0089] During preparation, take the first polycarbonate TPU film, use oxygen to bombard the surface of the first polycarbonate TPU film at a power of 50W for 1 minute, and then sputter a chromium layer, a gold layer, an aluminum oxide layer, a gold layer, an aluminum oxide layer, a gold layer, and an aluminum oxide layer on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0090] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the aluminum oxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0091] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0092] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0093] Comparative Example 1

[0094] The commercially available 190 μm thick nano skylight ice armor was used as a comparative example.

[0095] Comparative Example 2

[0096] A commercially available 145 μm magnetron window film was used as a comparative example.

[0097] Comparative Example 3

[0098] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 4.

[0099] Table 4 Materials and thickness of each layer of skin care insulation film car cover tape

[0100]

[0101]

[0102] During preparation, a first polycarbonate TPU film was taken, and the surface of the first polycarbonate TPU film was bombarded with oxygen at a power of 50W for 1 minute. Then, a gold layer, an aluminum oxide layer, a titanium layer, a silicon dioxide layer, an indium tin oxide layer, and a titanium dioxide layer were sputtered on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0103] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the titanium dioxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0104] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0105] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0106] Comparative Example 4

[0107] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 5.

[0108] Table 5 Material and thickness of each layer of skin care insulation film car cover tape

[0109]

[0110] During the preparation, a first polycarbonate TPU film was taken, and the surface of the first polycarbonate TPU film was bombarded with oxygen at a power of 50W for 1 minute, and then a chromium layer, a gold layer, and an aluminum oxide layer were sputtered on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0111] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the aluminum oxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0112] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0113] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0114] Comparative Example 5

[0115] The skin care and heat insulation film car cover tape in this embodiment includes a release layer, an installation adhesive layer, a functional layer, a structural adhesive layer, a substrate layer, a thermal repair layer and a protective layer stacked in sequence. The materials and thicknesses of each layer are shown in Table 6.

[0116] Table 6 Material and thickness of each layer of skin care insulation film car cover tape

[0117]

[0118]

[0119] During preparation, a first polycarbonate TPU film was taken, and the surface of the first polycarbonate TPU film was bombarded with oxygen at a power of 50W for 1 minute. Then, a chromium layer, a gold layer, a titanium layer, and an indium tin oxide layer were sputtered on the surface of the first polycarbonate TPU film in sequence to obtain a functional layer.

[0120] Take the second polycarbonate TPU film, directly apply the structural adhesive layer polyurethane adhesive through the slit, composite the functional layer on the polyurethane adhesive, and make the indium tin oxide layer and the polyurethane adhesive adhere to obtain a semi-finished product one.

[0121] The semi-finished product 1 was aged at 40° C. for 24 hours, a PET release film was taken, acrylic adhesive was directly coated on the PET release film through a slit, and the semi-finished product 1 was composited on the acrylic adhesive to adhere the first polycarbonate TPU film to the acrylic adhesive to obtain a semi-finished product 2.

[0122] The semi-finished product 2 was aged at room temperature for 24 hours, a heat-repairing adhesive layer polyurethane adhesive was directly coated on the second polycarbonate TPU film through a slit, a PET hardening film was compounded on the heat-repairing adhesive layer polyurethane adhesive, and aged at 50°C for 48 hours to obtain a skin-protection heat-insulating film car cover tape.

[0123] The car cover tapes prepared in the examples and comparative examples were tested. The transmittance was measured using a Linshang LS162A tester, the UV blocking rate was measured using a Lamda 950 spectrophotometer, the infrared blocking rate was measured using a Linshang LS162A tester, and the infrared reflectance was measured using an LS122 infrared power meter / 150W infrared lamp. The stain resistance was tested by applying with a Chenguang Shuangjie MG-2110 oil-based marker and wiping with a dust-free cloth dipped in alcohol after 10 minutes. The chemical resistance was tested by spraying with Biaobang Carburetor / Biaobang Asphalt Cleaner and wiping with a dust-free cloth after 10 minutes. The impact resistance was tested according to ASTM-D2170-87. The test results are shown in Table 7.

[0124] Table 7 Car cover tape test results

[0125]

[0126]

[0127] As shown in Table 7, the car cover tapes of the present invention exhibit superior transparency, heat insulation, sun protection, chemical resistance, stain resistance, and mechanical properties compared to the comparative examples. They effectively block solar heat, resulting in car cover tapes that provide skin protection, heat insulation, sun protection, high weather resistance, and explosion resistance. Furthermore, as shown in Examples 1-3, using different materials for the reflective layer within the three-layer composite layer can further improve infrared radiation blocking, thereby more effectively enhancing the thermal insulation properties of the car cover tapes.

[0128] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0129] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A skin-protection and heat-insulating film car cover tape, characterized in that: It includes a release layer, a mounting adhesive layer, a functional layer, a structural adhesive layer, a base material layer, a thermal repair layer and a protective layer stacked in sequence; The functional layer includes a TPU base layer, a transition layer is provided on the TPU base layer, and at least three composite layers are provided on the side of the transition layer facing away from the TPU base layer. The composite layer includes a reflective layer and a dielectric layer, and the dielectric layer is located on the side of the reflective layer facing away from the transition layer. The material of the transition layer is chromium or titanium; The material of the reflective layer is at least one of gold, silver, titanium, nickel, chromium, and indium tin oxide; The material of the dielectric layer is at least one of SiO2, Al2O3, TiO2, and ZnO.

2. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: In the functional layer, the reflective layers in at least two composite layers are made of different materials.

3. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The thickness of the transition layer is 10nm-50nm.

4. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The thickness of the reflective layer is 5nm-10nm.

5. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The dielectric layer has a thickness of 3nm-5nm.

6. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The thickness of the TPU base layer is 20 μm-50 μm.

7. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The surface of the TPU base layer is treated by low-temperature plasma, the reaction gas of the low-temperature plasma is at least one of argon and oxygen, and the treatment conditions are: power 50W-200W, time 1min-5min.

8. The skin-protection and heat-insulating film car cover tape according to claim 1, characterized in that: The release layer is a PET release film layer with a thickness of 75 μm-92 μm; And / or, the mounting adhesive layer is a UV400 acrylic adhesive layer with a thickness of 30μm-50μm And / or, the structural adhesive layer is a polyurethane adhesive layer with a thickness of 5 μm-10 μm; And / or, the substrate layer is a polycarbonate TPU substrate layer with a thickness of 100 μm-200 μm; And / or, the thermal repair layer is a polyurethane layer with a thickness of 15 μm-25 μm; And / or, the protective layer is a PET hardened film layer with a thickness of 36 μm-50 μm.

9. The method for preparing the skin-protection and heat-insulating film car cover tape according to any one of claims 1 to 8, characterized in that: The steps include: Taking a base material layer, compounding a structural adhesive layer on the surface of the base material layer, and compounding a functional layer on the surface of the structural adhesive layer to obtain a semi-finished product 1; Taking the release layer and compounding the installation adhesive layer on the release layer, compounding the installation adhesive layer on the functional layer to obtain a second semi-finished product; A thermal repair layer is compounded on the surface of the base material layer away from the structural adhesive layer, and a protective layer is compounded on the surface of the thermal repair layer to obtain a skin-protection and heat-insulating film car cover tape.

10. The method for preparing the skin-protection heat-insulating film car cover tape according to claim 9, characterized in that: The functional layer is prepared as follows: The TPU substrate layer treated with low-temperature plasma is treated under the following conditions: using at least one of argon and oxygen as a reaction gas and treating the surface of the TPU substrate layer at a power of 50W-200W for 1min-5min; A transition layer is plated on the surface of the TPU base layer; At least three composite layers are plated on the surface of the transition layer, and the composite layers include a reflective layer and a dielectric layer arranged on the reflective layer.

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