CN106313832A - A kind of heat insulation film and preparation method thereof - Google Patents

Abstract

The invention provides a heat insulation film, which comprises a film protection layer; a base material layer compounded on the protective film layer; a metal hardened layer compounded on the base material layer; a metal oxide layer compounded on the metal hardened layer; a thermoplastic polyurethane elastomer layer compounded on the metal oxide glue layer; a glue layer compounded on the thermoplastic polyurethane elastomer layer; a stripping film layer compounded on the adhesive layer; the metal hardened layer is made of ultraviolet curing adhesive containing metal particles; the metal oxide layer is made of glue containing titanium dioxide. The heat insulation film uses the metal hardening layer containing metal particles, and simultaneously uses the metal oxide layer containing titanium dioxide and the thermoplastic polyurethane elastomer layer, so that partial energy of sunlight can be absorbed after being reflected, the heat insulation function is further enhanced, and the reflection is reduced. The invention also provides a preparation method of the heat insulation film.

Description

A kind of heat insulation film and preparation method thereof

technical field

The invention belongs to the technical field of film materials, and in particular relates to a heat-insulating film and a preparation method thereof.

Background technique

The spectrum of solar radiation to the earth is divided into infrared, ultraviolet, and visible light according to different wavelengths; among them, ultraviolet light has the shortest wavelength and the highest energy, which leads to dark skin, freckles, and even skin cancer.

Heat insulation film can effectively block the mid-infrared and ultraviolet rays of solar radiation. At present, the heat insulation film in the market is mainly added with reflective substances, such as metal particles. Aluminum, gold, copper, silver and other metals are made into multi-layer dense high heat insulation metal film layers by vacuum spraying or magnetron sputtering technology. The electrons (free electrons) in the outer shell of metal materials are generally not bound by the nucleus. When irradiated by light waves, the electric field of the light waves makes the free electrons absorb the energy of the light, and produce oscillations with the same frequency as the light, which emits the same frequency as the original Light of the same frequency as light is called reflection of light. These metal layers will selectively reflect various thermal energy in sunlight, including infrared, ultraviolet and visible light thermal energy, so as to effectively play the role of heat insulation.

Although the heat insulation film added with metal particles has a good heat insulation effect, its outstanding disadvantage is that it is highly reflective, which is easy to cause light pollution and affect the visual effect.

Contents of the invention

The object of the present invention is to provide a heat-insulating film and a preparation method thereof. The heat-insulating film in the present invention has good heat-insulating effect and weak light reflection.

The invention provides a heat insulation film, including a protective film layer;

The substrate layer compounded on the protective film layer;

Metal hardened layer compounded on the substrate layer;

A metal oxide layer compounded on the metal hardened layer;

A thermoplastic polyurethane elastomer layer compounded on the metal oxide adhesive layer;

An adhesive layer compounded on the thermoplastic polyurethane elastomer layer;

The release film layer compounded on the adhesive layer;

The metal hardened layer is made of UV-curable glue containing metal particles;

The metal oxide layer is made of glue containing one or more of titanium dioxide, tin oxide and zinc oxide.

Preferably, the UV-curable adhesive includes 15-50 parts by weight of prepolymer, 30-60 parts by weight of cross-linking monomer, 2-5 parts by weight of photoinitiator and 50-100 parts by weight of solvent.

Preferably, the metal particles include one or more of gold particles, silver particles, aluminum particles and copper particles;

The mass ratio of the metal particles to the UV-curable adhesive is 1:(40-50).

Preferably, the particle diameter of the metal particles is 0.02-0.38 mm.

Preferably, the mass ratio of titanium dioxide to glue is 1:(30-50).

Preferably, the glue is selected from one or more of silicone glue, acrylic glue and polyurethane glue.

Preferably, the thickness of the protective film layer is 20-100 μm;

The thickness of the substrate layer is 50-200 μm;

The thickness of the hardened metal layer is 3-10 μm;

The thickness of the metal oxide layer is 20-50 μm;

The thickness of the thermoplastic polyurethane elastomer layer is 100-300 μm;

The thickness of the adhesive layer is 20-50 μm;

The thickness of the peeling film layer is 40-60 μm.

Preferably, an antifouling layer is also provided between the substrate layer and the protective film layer.

Preferably, the antifouling layer is made of materials containing 10-30 parts by weight of fluorine-containing compounds and 70-90 parts by weight of acrylic copolymer;

The thickness of the antifouling layer is 2-5 μm.

The invention provides a method for preparing a thermal insulation film, comprising the following steps:

A) coating the UV-curable adhesive containing metal particles on one side of the base material, and performing UV-curing to obtain a base material coated with a metal hardened layer;

B) coating the glue containing the metal oxide on the surface of the metal hardened layer, and curing to obtain the metal oxide layer;

C) Pasting a thermoplastic polyurethane elastomer layer, coating glue, pasting a peeling film on the surface of the metal oxide layer in sequence, and pasting a protective film layer on the other side of the substrate to obtain a heat insulation film.

The invention provides a heat insulation film, comprising a protective film layer; a substrate layer compounded on the protective film layer; a metal hardened layer compounded on the substrate layer; a metal oxide layer compounded on the metal hardened layer; The thermoplastic polyurethane elastomer layer on the metal oxide adhesive layer; the adhesive layer compounded on the thermoplastic polyurethane elastomer layer; the peeling film layer compounded on the adhesive layer; the metal hardened layer is made of ultraviolet light curing adhesive containing metal particles into; the metal oxide layer is made of a glue containing titanium dioxide. The thermal insulation film in the present invention uses a metal hardened layer containing metal particles, a metal oxide layer containing titanium dioxide and a thermoplastic polyurethane elastomer layer in combination, which can reflect part of the energy of sunlight and then perform energy absorption, further strengthening the insulation. Thermal function, and reduce reflection. In addition, the heat-insulating film of the present invention also has good impact resistance, and has high safety performance when the vehicle windows or doors and windows pasted with the heat-insulating film of the present invention are impacted.

Furthermore, the heat insulation film in the present invention is also provided with an antifouling layer, which can well prevent the heat insulation film from being polluted, is easy to wipe, and can maintain cleanliness for a long time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural view of a thermal insulation film in Example 1 of the present invention;

1 is the protective film layer, 2 is the antifouling layer, 3 is the substrate layer, 4 is the metal hardening layer, 5 is the metal oxide layer, 6 is the TPU layer, 7 is the adhesive layer, and 8 is the release film.

detailed description

The invention provides a heat insulation film, including a protective film layer;

The substrate layer compounded on the protective film layer;

Metal hardened layer compounded on the substrate layer;

A metal oxide layer compounded on the metal hardened layer;

A thermoplastic polyurethane elastomer layer compounded on the metal oxide adhesive layer;

The adhesive layer compounded on the thermoplastic polyurethane elastomer layer;

The release film layer compounded on the adhesive layer;

The metal hardened layer is made of UV-curable glue containing metal particles;

The metal oxide layer is made of a glue containing titanium dioxide.

In the present invention, the protective film layer is selected from polyethylene terephthalate substrate layer (PET layer), polyethylene naphthalate substrate layer (PEN layer), polycarbonate substrate layer One or more of (PC layer), polypropylene substrate layer (PP layer) and polyethylene substrate layer (PE layer); the thickness of the protective film layer is preferably 20～100 μ m, more preferably 30～ 80 μm, most preferably 50-60 μm; the present invention has no special limitation on the source of the protective film layer, specifically, in the embodiment of the present invention, the optical grade provided by Beijing Kangdexin Composite Materials Co., Ltd. can be used PET substrate.

In the present invention, an anti-fouling layer is preferably compounded on the protective film layer. The anti-fouling layer can well prevent the heat insulation film from being polluted by sundries, is easy to wipe, and maintains cleanliness for a long time. In the present invention, the anti-fouling layer is made of anti-fouling glue, and the anti-fouling glue includes 10-30 parts by weight of fluorine-containing compound and 70-90 parts of acrylic acid copolymer. Fluorine compounds preferably include ethylene-tetrafluoroethylene copolymer (ETFE), polytetrafluoroethylene (PTFE), fluorinated ethylene-propylene copolymer (FEP), perfluoroalkoxy resin (PFA), polychlorotrifluoroethylene (PCTFE) ), ethylene-chlorotrifluoroethylene copolymer (ECTFE), polyvinylidene fluoride (PVDF) and polyvinyl fluoride; the parts by weight of the fluorine-containing compound are preferably 15 to 25 parts, It is more preferably 20 parts; the acrylic acid interpolymer is preferably a modified acrylic acid interpolymer; the weight part of the acrylic acid interpolymer is preferably 75-85 parts, more preferably 80 parts. The thickness of the antifouling layer is preferably 2-5 μm, more preferably 3-4 μm. In the embodiment of the present invention, the modified acrylic acid interpolymer of the type MOK-2023 provided by Merck Chemicals, Germany can be used specifically.

In the present invention, the base material layer is compounded on the protective film layer, preferably on the antifouling layer. In the present invention, the substrate layer is preferably selected from polyethylene terephthalate substrate layer (PET layer), polyethylene naphthalate substrate layer (PEN layer), polycarbonate substrate layer layer (PC layer), polypropylene substrate layer (PP layer), polyvinyl chloride (PVC) and polyethylene substrate layer (PE layer); the thickness of the substrate layer is preferably 50 ~200 μm, more preferably 75-150 μm, and 80-100 μm, specifically, in the embodiment of the present invention, it can be 50 μm, 75 μm or 100 μm. In the present invention, the base material layer is preferably transparent and colorless, the surface hardness of the base material layer is preferably 3H to 4H, and the wear resistance is strong; the light transmittance of the base material layer is preferably 90%. Above, higher light transmittance can ensure better use effect and better protection for eyes. Specifically, in the embodiment of the present invention, the optical-grade PET substrate provided by Beijing Kangdexin Composite Materials Co., Ltd. can be used.

In the present invention, the metal hardened layer is compounded on the surface of the substrate layer, and the metal hardened layer is made of ultraviolet light-curable glue containing metal particles. In the present invention, the metal particles preferably include gold particles, One or more of silver particles, aluminum particles and copper particles; the particle size of the metal particles is preferably P1-P5; the mass ratio of the metal particles to the UV-curable adhesive is preferably 1: (40-50) , more preferably 1:45.

In the present invention, the UV-curable adhesive includes a prepolymer, a crosslinking monomer, a photoinitiator and a solvent; the prepolymer includes one of epoxy acrylic resin, polyurethane acrylic resin and polyester acrylic resin or several; the weight parts of the prepolymer is preferably 15 to 50 parts, more preferably 20 to 40 parts; the crosslinking monomer preferably includes hexanediol diacrylate, neopentyl glycol diacrylate One or more of (NPGDA), tripropylene glycol diacrylate (TPGDA); the parts by weight of the crosslinking monomer is preferably 30 to 60 parts, more preferably 40 to 50 parts; the light The initiator preferably includes benzophenone and triethanolamine, and the mass ratio of the benzophenone and triethanolamine is preferably 2:1; the parts by weight of the photoinitiator are preferably 2 to 5 parts, more preferably 3 parts by weight. ~4 parts; the solvent preferably includes one or more of toluene, butanone and propylene glycol methyl ether acetate; the parts by weight of the solvent are preferably 50-100 parts, more preferably 55-80 parts. Specifically, in the embodiment of the present invention, the BTF-220 UV glue provided by Dongguan Betley Company can be specifically used. In the present invention, the thickness of the hardened metal layer is preferably 3-10 μm, more preferably 4-9 μm, most preferably 5-8 μm, specifically, in an embodiment of the present invention, may be 5 μm.

In the present invention, the metal oxide layer is compounded on the metal hardening layer, and the metal oxide layer can absorb a part of the remaining energy after the metal hardening layer reflects a part of sunlight energy, thereby reducing light reflection. In the present invention, the metal oxide layer is made of glue containing metal oxide, that is, the material for making the metal oxide layer includes metal oxide and glue, and the metal oxide preferably includes titanium dioxide, tin oxide and one or more of zinc oxide; the mass ratio of the metal oxide to the glue is preferably 1: (30-50), more preferably 1: (35-45), and most preferably 1:40; The above-mentioned glue is preferably selected from one or more of organic silicone glue, acrylic glue and polyurethane glue. In the embodiment of the present invention, the 7651 type silicone glue provided by Dow Corning can be used. In the present invention, the thickness of the metal oxide layer is preferably 20-50 μm, more preferably 25-40 μm, and most preferably 30-35 μm. Specifically, in the embodiment of the present invention, 20 μm or 25 μm can be used. The peeling force of the metal oxide layer is preferably 500-1000 g, more preferably 600-900 g, and most preferably 700-800 g.

In the present invention, the thermoplastic polyurethane elastomer layer (TPU layer) has the characteristics of high strength, good toughness, cold resistance, oil resistance, aging resistance, weather resistance, environmental protection, non-toxic, decomposable, etc., and has high waterproof and moisture permeability, windproof , anti-cold, antibacterial, warm, anti-ultraviolet and energy release and many other excellent functions, with the use of metal hardened layer and metal oxide layer, can further optimize the heat insulation function and increase its use value. In the present invention, the thickness of the TPU layer is preferably 100-300 μm, more preferably 150-250 μm. The present invention has no special limitation on the source of the TPU layer. Specifically, in the embodiments of the present invention, the TPU film of the 70715-GH43S model provided by San Fang Chemical Industry Co., Ltd. can be used .

In the present invention, the adhesive layer is compounded on the surface of the TPU layer, preferably made of acrylic glue. Specifically, in the embodiment of the present invention, S-804A acrylic glue provided by Hesheng International Co., Ltd. can be used. glue. The thickness of the adhesive layer is preferably 20-50 μm, more preferably 25-45 μm, most preferably 30-40 μm, specifically, in an embodiment of the present invention, it may be 20 μm, 25 μm or 30 μm.

In the present invention, the release film layer is preferably a silicone oil release film, and the thickness of the release film is preferably 40-60 μm, more preferably 50 μm. The present invention has no special restrictions on the source of the release film, specifically , In the embodiment of the present invention, the PW-KG type silicone oil release film provided by Shanghai Fu Peng Adhesive Products Co., Ltd. can be used.

The heat insulation film in the present invention is tested with a light transmission haze measuring instrument to have a light transmittance ≥ 88%, and a haze < 10%.

The present invention also provides a method for preparing a thermal insulation film, comprising the following steps:

A) coating the UV-curable adhesive containing metal particles on one side of the base material, and performing UV-curing to obtain a base material coated with a metal hardened layer;

B) coating the glue containing the metal oxide on the surface of the metal hardened layer, and curing to obtain the metal oxide layer;

C) Laying a thermoplastic polyurethane elastomer layer on the surface of the metal oxide layer, coating an adhesive solution, laminating a peeling film in sequence, and laminating a protective film layer on the other side of the base material to obtain a heat insulating film.

In the present invention, it is preferable to coat the antifouling glue on the other side of the substrate before coating the metal hardened layer on one side of the substrate, and form an antifouling layer on the surface of the substrate after curing. In the present invention, the composition, dosage and composition of the anti-fouling glue are the same as those derived from the above-mentioned anti-fouling glue, and will not be repeated here.

In the present invention, the curing of the antifouling layer is preferably thermal curing, and the curing temperature is preferably 80-120°C, more preferably 90-110°C, most preferably 100°C; the curing time is preferably 100-150s, more preferably 110-140s, most preferably 120-130s.

In the present invention, preferably in a reducing atmosphere, the metal particles are first ultrasonically dispersed in the UV-curable glue to obtain the UV-curable glue containing metal particles, and then the UV-curable glue containing metal ions is coated on the other side of the substrate. On the one hand, thermal curing is performed first to volatilize the solvent, and then ultraviolet curing is performed to obtain a base material coated with a metal hardened layer. That is, a substrate coated with a metal hardening layer on one side and an antifouling layer on the other side.

In the present invention, the types and amounts of the metal particles, UV-curable adhesive and substrate are consistent with the types, amounts and sources of the metal particles, UV-curable adhesive and substrate mentioned above, and will not be repeated here.

In the present invention, the thermal curing temperature is preferably 80-120°C, more preferably 90-110°C, most preferably 100°C; the thermal curing time is preferably 100-150s, more preferably 110-140s , most preferably 120 to 130s; the UV irradiation intensity of the UV curing is preferably 30 to 150w/cm, more preferably 50 to 130w/cm, most preferably 80 to 100w/cm; the UV curing time Preferably it is 1-3s.

Then, the glue containing titanium dioxide is coated on the surface of the hardened metal layer and cured to obtain a metal oxide layer. In the present invention, the titanium dioxide-containing glue is consistent with the composition, dosage and source of the above-mentioned titanium dioxide-containing glue, and will not be repeated here. In the present invention, the curing temperature of the metal oxide layer is preferably 80-120°C, more preferably 90-110°C, most preferably 100°C; the curing time of the metal oxide layer is preferably 80-100s, More preferably 90s. In the present invention, the glue containing titanium dioxide is preferably coated with a comma doctor blade.

After the metal oxide layer is obtained, the present invention sticks the TPU film on the surface of the metal oxide layer, then coats the viscose liquid on the surface of the TPU film, then sticks a layer of release film, and finally coats the surface of the base material or the antifouling layer. A layer of protective film is pasted on the surface to obtain a heat insulation film.

The invention provides a heat insulation film, comprising a protective film layer; a substrate layer compounded on the protective film layer; a metal hardened layer compounded on the substrate layer; a metal oxide layer compounded on the metal hardened layer; The thermoplastic polyurethane elastomer layer on the metal oxide adhesive layer; the adhesive layer compounded on the thermoplastic polyurethane elastomer layer; the peeling film layer compounded on the adhesive layer; the metal hardened layer is made of ultraviolet light curing adhesive containing metal particles into; the metal oxide layer is made of a glue containing titanium dioxide. The thermal insulation film in the present invention uses a metal hardened layer containing metal particles, a metal oxide layer containing titanium dioxide and a thermoplastic polyurethane elastomer layer in combination, which can reflect part of the energy of sunlight and then perform energy absorption, further strengthening the insulation. Thermal function, and reduce reflection. In addition, the double-layer use of PET base material and TPU base material in the invention can increase the hardness of the protective film to more than 3H, further realize the impact resistance effect and have better elastic shock absorption function, and have good impact resistance Performance, when the windows or doors and windows pasted with the heat insulation film of the present invention are impacted, they have higher safety performance.

Furthermore, the heat insulation film in the present invention is also provided with an antifouling layer, which can well prevent the heat insulation film from being polluted, is easy to wipe, and can maintain cleanliness for a long time.

In order to further illustrate the present invention, a heat insulation film and its preparation method provided by the present invention will be described in detail below in conjunction with examples, but these should not be construed as limiting the protection scope of the present invention.

In the following examples, the modified acrylic acid copolymer is a modified acrylic acid copolymer of the MOK-2023 type provided by Merck Chemicals, Germany, and the PET substrate is an optical-grade PET substrate provided by Beijing Kangdexin Composite Materials Co., Ltd. The UV glue is the BTF-220 type UV glue provided by Dongguan Betley Company, the organic silicone liquid is the 7651 type silicone glue provided by Dow Corning, the TPU film is the 70715-GH43S type TPU film provided by Sanfang Chemical Industry, and silicone oil The release film is a PW-KG type silicone oil release film provided by Shanghai Fupeng Adhesive Products Co., Ltd.

Implementation column 1

The antifouling glue (15 parts of fluorine-containing compound, 85 parts of special modified acrylic copolymer) is coated on a 50 μm thick PET substrate with a micro-gravure roller, and cured in an oven; the curing temperature is 100 ° C, and the curing time is 120 s , Antifouling glue coating thickness 2μm;

On the opposite side of the base material coated with antifouling UV coating, coat a layer of metal hardening layer, wherein the metal particles are aluminum, and the UV glue is the UV hardening layer consisting of 50 parts of solvent, 30 parts of crosslinking monomer, prepolymer 20 parts, composed of 5 parts of photoinitiator. The solvent is toluene; the crosslinking monomer is hexanediol diacrylate; the prepolymer is epoxy acrylic resin; the photoinitiator is benzophenone and triethanolamine mixed at 2:1. And after the oven temperature is 100°C, the time is 120s, the solvent is volatilized and UV curing is formed. The thickness of the hardened metal layer is 5 μm.

Titanium dioxide is added to the silicone pressure-sensitive adhesive. The silicone pressure-sensitive adhesive is about 60 parts by weight of organosiloxane as the main solid component, and about 40 parts by weight of the pressure-sensitive adhesive product with toluene and xylene as the solvent. A comma-type scraper is used to coat the surface of the metal hardened layer, and after curing in an oven, it is attached to a 150 μm TPU substrate, and the thickness of the TPU substrate is 25 μm.

Coat a layer of 20 μm S-804A acrylic glue provided by Hesheng International Co., Ltd. on the surface of TPU, attach a 50 μm silicone oil release film, and attach a PET substrate to the surface of the antifouling layer to obtain a heat insulation film.

The present invention uses the falling ball impact tester MY-LQT-1800 to test the impact resistance of the heat insulation film obtained in this embodiment, the falling ball control method: DC electromagnetic control, the falling ball height: 1.295m (Max.), 535g test ball/100cm The impact test was carried out under the condition of height, and there was no scratch or crack on the surface; the impact test was carried out under the condition of 1040g test ball/100 cm height, the surface was slightly concave and convex, but not broken. The results show that the heat insulation film of this embodiment can effectively resist impact.

Implementation column 2

The antifouling glue (25 parts of fluorine-containing compound, 75 parts of special modified acrylic copolymer) is coated on a 75 μm thick PET substrate with a micro-gravure roller, and cured in an oven; the curing temperature is 120 ° C, and the curing time is 90 s , antifouling glue coating thickness 3μm;

On the opposite side of the base material coated with antifouling UV coating, coat a layer of metal hardening layer, wherein the metal particles are gold, 55 parts of UV glue solvent, 30 parts of crosslinking monomer, 15 parts of prepolymer, photoinitiated The composition consists of 3 parts. The solvent is toluene; the crosslinking monomer is hexanediol diacrylate; the prepolymer is epoxy acrylic resin; the photoinitiator is benzophenone and triethanolamine mixed at 2:1. And after the temperature of the oven is 120°C, the time is 90s, the solvent is volatilized and UV curing is formed. The thickness of the hardened metal layer is 5 μm.

Titanium dioxide is added to the silicone pressure-sensitive adhesive. The silicone pressure-sensitive adhesive is about 55 parts by weight of organosiloxane as the main solid component, and about 45 parts by weight of the pressure-sensitive adhesive product with toluene and xylene as the solvent. Use a comma-type doctor blade to coat under the metal hardened layer, and after curing in an oven, stick to a 150μm TPU substrate, and the thickness of the TPU substrate is 20μm.

Coat a layer of S-804A acrylic glue provided by Hesheng International Co., Ltd. with a thickness of 30 μm on the surface of the TPU, attach a 50 μm silicone oil release film, and attach a PET substrate to the surface of the antifouling layer to obtain a heat insulation film.

Implementation column 3

The anti-fouling glue (25 parts of fluorine-containing compound, 75 parts of special modified acrylic copolymer) was coated on a 100 μm PET substrate with a micro-gravure roller, and cured in an oven; the curing temperature was 120°C, and the curing time was 90s. Glue coating thickness 4μm;

On the opposite side of the base material coated with antifouling UV coating, coat a layer of metal hardening layer, wherein the metal particles are gold, UV glue consists of 50 parts of solvent, 30 parts of crosslinking monomer, 20 parts of prepolymer, light Initiator consists of 3 parts. The solvent is toluene; the crosslinking monomer is hexanediol diacrylate; the prepolymer is epoxy acrylic resin; the photoinitiator is benzophenone and triethanolamine mixed at 2:1. And after the temperature of the oven is 120°C, the time is 90s, the solvent is volatilized and UV curing is formed. The thickness of the hardened metal layer is 5 μm.

Titanium dioxide is added to the silicone pressure-sensitive adhesive. The silicone pressure-sensitive adhesive is about 60 parts by weight of organosiloxane as the main solid component, and about 40 parts by weight of the pressure-sensitive adhesive product with toluene and xylene as the solvent. A comma-type scraper is used to coat the surface of the metal hardened layer, and after curing in an oven, it is attached to a 150 μm TPU substrate, and the thickness of the TPU substrate is 25 μm.

Coat a layer of 30 μm silicone pressure-sensitive adhesive on the surface of TPU, attach a 50 μm silicone oil release film, and attach a PET substrate on the surface of the antifouling layer to obtain a heat insulation film.

Example 4

A layer of metal hardening layer is coated on the PET substrate, wherein the metal particles are aluminum, and the UV glue is composed of 50 parts of solvent, 30 parts of crosslinking monomer, 20 parts of prepolymer and 5 parts of photoinitiator. The solvent is toluene; the crosslinking monomer is hexanediol diacrylate; the prepolymer is epoxy acrylic resin; the photoinitiator is benzophenone and triethanolamine mixed at 2:1. And after the temperature of the oven is 120°C, the time is 90s, the solvent is volatilized and UV curing is formed. The thickness of the hardened metal layer is 5 μm.

Titanium dioxide is added to the silicone pressure-sensitive adhesive. The silicone pressure-sensitive adhesive is about 60 parts by weight of organosiloxane as the main solid component, and about 40 parts by weight of the pressure-sensitive adhesive product with toluene and xylene as the solvent. Use a comma-type scraper to coat the surface of the metal hardened layer, and after curing in an oven at 110-130°C, attach a 150μm TPU substrate with a thickness of 25μm.

Coat a layer of 20μm S-804A acrylic glue provided by Hesheng International Co., Ltd. on the surface of the TPU. The 180° peeling force of the adhesive layer tested according to GB2792-1998 is 200gf/25mm-800gf/25mm. Bond a 50 μm silicone oil release film to obtain a heat insulating film.

The present invention uses rubber alcohol wear-resistant testing machine to test the wear resistance of the heat insulation film in Examples 1 to 4, and uses a double-display double-control peeling strength testing machine to test its peeling force to be 200gf/25mm-800gf/25mm. Haze measuring instrument tests light transmittance ≥ 88%, haze < 10%. Use model LH1013 optical transmittance measuring instrument to test its ultraviolet transmittance, infrared transmittance and visible light transmittance.

Example 5

The performance test results of the heat insulation films obtained in Examples 1 to 4 are shown in Table 1.

Table 1 Performance test of thermal insulation film in Examples 1 to 4 of the present invention

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a thermal isolation film, including cuticular layer；

The substrate layer being compounded on cuticular layer；

The metallic hardened layer being compounded on substrate layer；

The metal oxide layer being compounded on metallic hardened layer；

The Polyurethane Thermoplastic Elastomer layer being compounded on metal-oxide glue-line；

It is compounded in the adhesive-layer on Polyurethane Thermoplastic Elastomer layer；

The stripping film layer being compounded on glue-line；

Described metallic hardened layer is made up of the ultraviolet cured adhesive comprising metallic；

Described metal oxide layer is made up of the glue of one or more comprising in titanium dioxide, stannum oxide and zinc oxide.

Thermal isolation film the most according to claim 1, it is characterised in that described ultraviolet cured adhesive includes 15～50 weight portions Prepolymer, 30～60 weight portion cross-linking monomer, 2～5 weight portion light trigger and the solvent of 50～100 weight portions.

Thermal isolation film the most according to claim 1, it is characterised in that described metallic includes gold particle, silver particles, aluminum shot One or more in son and copper particle；

Described metallic is 1:(40～50 with the mass ratio of ultraviolet cured adhesive).

Thermal isolation film the most according to claim 1, it is characterised in that the particle diameter of described metallic is 0.02～0.38mm.

Thermal isolation film the most according to claim 1, it is characterised in that described titanium dioxide is 1:(30 with the mass ratio of glue ～50).

Thermal isolation film the most according to claim 5, it is characterised in that described glue is selected from organosilicon glue, acrylic acid glue With one or more in polyurethane glue.

Thermal isolation film the most according to claim 1, it is characterised in that the thickness of described cuticular layer is 20～100 μm；

The thickness of described substrate layer is 50～200 μm；

The thickness of described metallic hardened layer is 3～10 μm；

The thickness of described metal oxide layer is 20～50 μm；

The thickness of described Polyurethane Thermoplastic Elastomer layer is 100～300 μm；

The thickness of described adhesive-layer is 20～50 μm；

The thickness of described stripping film layer is 40～60 μm.

8. according to the thermal isolation film described in claim 1～7 any one, it is characterised in that between described substrate layer and cuticular layer It is additionally provided with anti-soil layer.

Thermal isolation film the most according to claim 8, it is characterised in that described anti-soil layer is by comprising 10～30 weight portions containing fluorination The material of compound and 70～90 parts by weight of acrylic acid copolymer is made；

The thickness of described anti-soil layer is 2～5 μm.

10. a preparation method for thermal isolation film, comprises the following steps:

A) ultraviolet cured adhesive containing metallic is coated on the one side of base material, carries out ultraviolet light polymerization, be coated with The base material of metallic hardened layer；

B) by the glue application containing metal-oxide on metallic hardened layer surface, solidify, obtain metal oxide layer；Institute State metal-oxide and include one or more in titanium dioxide, stannum oxide and zinc oxide；

C) fit successively on metal oxide layer surface Polyurethane Thermoplastic Elastomer layer, coating glue, laminating stripping film, at base The another side laminating cuticular layer of material, obtains thermal isolation film.