KR100893002B1 - Insulation Film and Method of Manufacturing The Same - Google Patents

Abstract

The present invention relates to a thermal barrier film, and in particular, microwave waves can be used to dry the thermal barrier layer, the adhesive layer, and the adhesive layer at a high speed to increase productivity, thereby lowering the manufacturing cost, and the surface of each dried layer is cracked. It relates to a thermal barrier film that does not occur, and a manufacturing method thereof.

The thermal barrier film of the present invention includes a base layer on which a thermal barrier layer is formed to block radiant heat flowing in and out of the room, and a protective layer on which an adhesive layer is adhered to the thermal barrier layer, wherein the thermal barrier layer and the adhesive layer are microscopic. It is characterized by drying with a wave.

Thermal barrier film, thermal barrier film, thermal barrier film manufacturing method

Description

Insulation Film and Method of Manufacturing The Same}

1 is a cross-sectional view of the thermal barrier film according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the thermal barrier film according to another embodiment of the present invention.

Figure 3 is a cross-sectional view of the thermal barrier film according to another embodiment of the present invention.

Figure 4 is a block diagram of a method of manufacturing a thermal barrier film of the present invention.

Figure 5 is an enlarged photo of the surface hardening using a microwave wave thermal barrier layer of the present invention.

Figure 6 is an enlarged photo of the surface hardening of the thermal barrier layer of the present invention using hot air drying.

7 is a graph showing the organic solvent content rate according to the irradiation time of the microwave wave of the present invention.

The present invention relates to a thermal barrier film, and in particular, microwave waves can be used to dry the thermal barrier layer, the adhesive layer, and the adhesive layer at a high speed to increase productivity, thereby lowering the manufacturing cost, and the surface of each dried layer is cracked. It relates to a thermal barrier film that does not occur, and a method of manufacturing the same.

In general, the coating layer is formed by mixing a coating solution and applying it to the surface of a substrate layer (coated film), followed by heating and drying, and vacuum drying, infrared drying, hot air drying, etc., using a conventional drying method of drying a liquid coating layer. Is being used.

Vacuum drying is a method of evaporating and drying a liquid by lowering the boiling point of the liquid by reducing the drying point of the drying chamber, and a separate heating means must be used in combination, and a decompression process is required, which requires a long drying time, resulting in a decrease in productivity. Infrared drying has a problem that the quality is degraded by local heating.

In the hot air drying method, the air heated by heat dries the coating layer. However, when the composition of the coating liquid contains an organic solvent having a high boiling point, the production speed cannot be increased, and heat is transferred by conduction from the surface of the coating layer to the inside. In order to dry up to the inside of the coating layer, it is necessary to maintain a high temperature or a low production rate.

In addition, in order to overcome the low production speed in the hot air drying method, there is a method of increasing the temperature of the air, but it may cause deformation of the coated substrate layer, causing cracks in the coating layer, resulting in poor quality of the coating layer, and waste of energy. There are still a lot of problems.

In addition, in the hot air drying method, since many organic solvents are used for coating, impurities more than necessary in the drying or curing step come out, causing environmental pollution.

On the other hand, as a conventional thermal barrier film used for construction or vehicles, a sputtering film in which a metal film is formed by a precise operation of attaching metal elements in atomic units to the substrate layer surface is introduced, and the thermal barrier film by sputtering is a substrate layer surface. It is known that the density of the metal film deposited on the substrate blocks the gas transmittance, heat ray wavelength or electromagnetic wave. However, the metal deposition or sputtering rate is slow, productivity is low, and the deposition or sputtering equipment is very expensive, the initial equipment investment costs a lot, there is a problem that the manufacturing cost increases.

The present invention has been made in order to solve the problems of the prior art, the object of the present invention is to dry or cure the thermal barrier layer, the adhesive layer, the adhesive layer of the thermal barrier film at a high speed by the dielectric heating method by the microwave wave As a result, it is possible to provide a high purity resultant product, and to increase the speed of the drying reaction time, thereby improving productivity, lowering manufacturing costs, and providing a thermal barrier film having low energy costs.

Another object of the present invention is to provide a thermal barrier film that is dried or cured to prevent cracking of the surface of the coating layer by microwave wave.

Another object of the present invention, by constructing a thermal barrier film using a microwave wave on a glass window of a building or a vehicle can be seen transparently without rejection of the landscape outside the window, and prevents the radiant heat incident as it is, the summer outside air temperature is high It is to provide a thermal barrier film that prevents a rapid rise in the room temperature of vehicles parked in the city and ensures high visibility during day and night driving.

Another object of the present invention is that the organic solvent, which is a heat shielding material, is decomposed by ultraviolet rays so that the interface of the heat shielding layer is not collapsed, and the heat shielding material of the heat shielding layer is protected from ultraviolet rays by the overlap of the base layer and the protective layer. In order to increase the light resistance as well as moisture resistance, drying of the thermal barrier layer coated on the substrate layer with microwave waves, drying the adhesive layer coated on the protective layer with microwave waves, and the thermal barrier layer And it provides a method for producing a thermal barrier film comprising the step of laminating the adhesive layer.

Another object of the present invention, by using a microwave wave to dry or harden the thermal barrier layer, the adhesive layer, the adhesive layer to reduce the organic solvent so that each layer is not cracked to produce a thermal barrier film that is environmentally friendly To provide.

The present invention is implemented by the embodiment having the following configuration in order to achieve the above object.

According to the first embodiment of the present invention, the thermal barrier film according to the present invention is a base layer formed with a thermal barrier layer for blocking radiant heat flowing in and out of the room and the outside, and a protective layer formed with an adhesive layer that can be bonded to the thermal barrier layer It includes, characterized in that the thermal barrier layer and the adhesive layer is dried by microwave waves.

According to the second embodiment of the present invention, in the thermal barrier film according to the first embodiment of the present invention, the microwave wave is 20 seconds to 30 so as not to cause cracks on the surface after drying of the thermal barrier layer or the adhesive layer. It is characterized by irradiating in the range of seconds.

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According to the fourth embodiment of the present invention, in the thermal barrier film according to the first or second embodiment of the present invention, the adhesive layer is an organic solvent formed from 50 to 100 parts by weight in 100 parts by weight of the acrylic copolymer. Characterized in that it comprises a.

According to a fifth embodiment of the present invention, in the thermal barrier film according to the fourth embodiment of the present invention, the base layer, a scratch prevention layer is added on the opposite side of the thermal barrier layer of the base layer to protect the outer surface Characterized in that included.

According to a sixth embodiment of the present invention, in the thermal barrier film according to the fourth embodiment of the present invention, the protective layer is formed on the surface opposite to the adhesive layer of the protective layer so as to be adhered to glass such as a building or a vehicle. Further comprising a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer is characterized in that it is dried by microwave waves.

According to a seventh embodiment of the present invention, in the method for manufacturing a heat shielding film according to the present invention, a heat shielding coating step of forming a heat shielding layer which can prevent the flow of radiant heat on one surface of the base layer, and the heat shielding layer A train single drying step of drying or curing with microwave waves, an adhesive coating step of forming an adhesive layer to adhere to the thermal barrier layer on one surface of a protective layer, and an adhesive drying step of drying or curing the adhesive layer with microwave waves Characterized in that.

According to an eighth embodiment of the present invention, in the method of manufacturing a thermal barrier film according to the seventh embodiment of the present invention, the thermal barrier drying step or the adhesive drying step, the surface after drying the thermal barrier layer or the adhesive layer The microwave wave is irradiated in a range of 20 seconds to 30 seconds so that cracking does not occur.

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According to a tenth embodiment of the present invention, in the method for manufacturing a thermal barrier film according to the seventh or eighth embodiment of the present invention, the adhesive layer is formed by 50 to 100 parts by weight in 100 parts by weight of the acrylic copolymer. Characterized in that it comprises an organic solvent.

According to an eleventh embodiment of the present invention, in the method of manufacturing a thermal barrier film according to a tenth embodiment of the present invention, the method further includes a lamination step of laminating the thermal barrier layer and the adhesive layer to protect the thermal barrier layer. Characterized in that.

According to a twelfth embodiment of the present invention, in the method of manufacturing a thermal barrier film according to an eleventh embodiment of the present invention, a scratch is provided on an opposite surface of the substrate layer on which the thermal barrier layer is formed in order to protect the outer surface of the substrate layer. It characterized in that it further comprises a scratch prevention coating step of forming a protective layer.

According to a thirteenth embodiment of the present invention, in the method of manufacturing a thermal barrier film according to an eleventh embodiment of the present invention, an adhesive layer is provided on a surface opposite to an adhesive layer of the protective layer so as to be adhered to a glass of a building or a vehicle. It comprises a pressure-sensitive adhesive coating step, wherein the pressure-sensitive adhesive layer is characterized in that it further comprises a pressure-sensitive adhesive drying step that is dried or cured with a microwave wave.

Hereinafter, a preferred embodiment of the present invention will be described in detail.

In the drying method of the coating liquid using microwave waves, when the microwave wave is irradiated to a liquid substance having a relatively weak binding force, the dipole of the liquid molecule changes its polarity in accordance with the frequency of the microwave wave, thereby rapidly rotating or translating. Because of this, frictional heat is generated between molecules, and this heating is called dielectric heating.

Therefore, in the coating liquid mixed with a large or small dielectric constant, the microwave wave can selectively penetrate into the liquid material where the dielectric constant is large and can be heated to the inside of the coating liquid in a short time, thereby reducing drying time and energy cost, as well as selective heating characteristics. Due to the organic solvent content can be reduced, solvent-free coating can be said to be a very environmentally friendly method.

On the other hand, in drying the thermal barrier layer 1, the adhesive layer 2, and the adhesive layer 6 with microwave waves, the irradiation time of the microwave waves (micro to the coating liquid) so as not to crack the surface of each layer The time for shining the wave wave) is preferably in the range of 10 seconds to 40 seconds, and particularly preferably in the range of 20 seconds to 30 seconds.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of the thermal barrier film according to an embodiment of the present invention. Figure 2 is a cross-sectional view of the thermal barrier film according to another embodiment of the present invention. 3 is a cross-sectional view of a thermal barrier film according to another embodiment of the present invention.

The thermal barrier film according to the present invention includes a thermal barrier layer 1, an adhesive layer 2, a base layer 3, a protective layer 4, a scratch prevention layer 5, an adhesive layer 6, and a release paper 7. .

The thermal barrier layer 1 is coated on one surface of the base layer 3 to be described below to prevent radiant heat from being introduced or released, and is cured or dried with microwave waves, and includes a binder, a thermal barrier material, an organic solvent, an additive, and the like. do.

The binder may be composed of one or two or more selected from the group consisting of an acrylic binder, a urethane binder, a modified epoxy binder, and an ester binder in order to increase the light resistance and yellowing resistance by bonding the composition of the thermal barrier layer, and preferably an acrylic binder. Use

Inorganic oxides, organic compounds and the like are used as the thermal barrier materials.

The inorganic oxide may be composed of one or two or more selected from the group consisting of antimony oxide, indium oxide, zinc oxide, and aluminum oxide, and the particle size of the inorganic oxide may be in the range of 150 nm to 200 nm to prevent whitening due to light scattering. Used, particularly preferably in the range from 80 nm to 100 nm.

In addition, examples of the organic compound include dimonium, phthalocyanine, and hexaboride compounds. The phthalocyanine and hexaboride compounds are large in particle size and must be dispersed by an apparatus such as a ball mill. Organic compounds such as these are suitable as thermal barrier materials because they are easy to use because they have high solubility in general organic solvents and they have little quantitative loss during other compounding processes.

The organic solvent added as the coating compound of the thermal barrier layer 1 is methyl ethyl ketone, toluene, ethyl acetate, isopropyl alcohol, ethyl cellosolve, isobutyl alcohol, dimethylformide, ethanol, butyl cellosolve, xylene, 1 It may be made of one or two or more selected from octanol, diethylene, glycol, nitrovangen.

In addition, additives such as tackifiers, fillers, softeners, thermosetting agents, and antioxidants may be added to the thermal barrier layer 1 as necessary.

The adhesive layer 2 is coated on one surface of the protective layer 4 to be described below so as to be able to adhere to the thermal barrier layer 1 and dried or cured with microwave waves, and the adhesive layer 2 is formed of an adhesive, a crosslinking agent, an initiator, an organic It is synthesized by solution polymerization including solvent.

Main monomer compositions applied to the adhesive include alkyl (meth) acrylates, among which n-propyl (meth) acrylate (n-propyl methacrylate), isopropyl (meth) acrylate (iso propyl methacrylate) and n- Butyl (meth) acrylate (n-butyl methacrylate), t-butyl (meth) acrylate (t-butyl methacrylate), sec-butyl (meth) acrylate (sec-butylmethacrylate), pentyl (meth) acrylate (pent yl methacrylate, 2-ethylhexyl methacrylate, n-octyl methacrylate, isooctyl methacrylate, iso-octyl methacrylate Nonyl (meth) acrylate (iso-nonyl methacrylate), lauryl (meth) acrylate (laurylmethacrylate), stearyl (meth) acrylate (stearyl methacrylate) may be made of one or two or more selected from the group consisting of.

The tackiness of the pressure-sensitive adhesive mainly depends on the molecular weight, molecular weight distribution or molecular weight of the polymer chain, and in particular, it is determined by the molecular weight, so the acrylic copolymer preferably has a weight average molecular weight of 800,000 to 200,000. On the other hand, it is preferable that the methacrylate monomer which has a C1-C12 alkyl group is contained by 90 to 99.9 weight% in an acryl-type copolymer. This is because when the methacrylate monomer is less than 90% by weight of the acrylic copolymer, there is a problem in that the initial adhesive strength is lowered, and when it exceeds 99.9% by weight, problems in durability may occur due to the decrease in cohesion.

The crosslinking agent increases the cohesive force of the adhesive by reacting with the acrylic copolymer, and improves adhesive property and cutting property such as durability of the adhesive product by the strong cohesive force of the adhesive, and the initiator initiates the synthesis reaction of solution polymerization of the adhesive. do.

The organic solvent is a solution polymerization of the composition of the adhesive layer 2, the protective layer 4 is provided so that the adhesive layer 2 is coated, the organic solvent is methyl ethyl ketone, toluene, ethyl acetate, isopropyl alcohol, ethyl cell Solv, isobutyl alcohol, dimethylformide, n-methylpyrrolidone, ethanol, butyl cellosolve, may be made of one or more from the group consisting of xylene.

In addition, the organic solvents are preferably used in 50 to 100 parts by weight of the acrylic copolymer 100 weight. This means that when the content of the organic solvent is less than 50, the surface of the coated adhesive layer 2 becomes uneven due to the viscosity increase during coating, and when the content of the organic solvent is 100 or more, By dropping the solid content of the coating mixture, the thickness of the dried adhesive layer (2) becomes thin, which lowers the adhesive strength of the adhesive layer (2), the production cost increases due to the solvent content more than necessary, and the organic solvent volatilizes to increase air pollution. This is because it becomes a factor.

On the other hand, it is preferable that the thickness of the contact bonding layer 2 is formed in 4 micrometers-5 micrometers. If the thickness of the adhesive layer 2 is thin, the adhesive strength is lowered. If the thickness is thick, the drying time of the adhesive layer 2 is longer, and the productivity is lowered. More energy is required to dry the adhesive layer 2, resulting in excessive energy waste. Because it is caused.

The base layer 3 is coated with the thermal barrier layer 1 on one surface thereof, preferably formed of polyethylene terephthalate to support and protect the thermal barrier layer 1, and the protective layer 4 on the surface thereof. When the adhesive layer 4 is coated, and preferably formed of polyethylene terephthalate, and the adhesive layer 2 is laminated with the thermal barrier layer 1, the protective layer 4 protects the thermal barrier layer 1.

According to another embodiment of the present invention, as shown in Figure 3, the scratch prevention layer 5 is applied to the other surface of the base layer 3 to protect the outer surface of the base layer 3, the adhesive layer ( 6) is applied to the other surface of the protective layer (4) is dried to form a microwave wave to be detachable to the glass of a building or a vehicle, the release paper (7) of the adhesive layer (6) before use of the thermal barrier film Attached to one surface to protect the adhesive layer 6, when the thermal barrier film 1 is used to detach the release paper (7) is formed so that the adhesive layer 6 can be attached to the glass of a building or a vehicle.

Figure 4 is a block diagram of a method of manufacturing a thermal barrier film of the present invention.

Such a thermal barrier film is produced by the method shown in FIG.

1 and 4, the present invention manufacturing method of the thermal barrier film includes a thermal barrier coating step (s1), thermal barrier drying step (s2), adhesive coating step (s3), adhesive drying step (s4). .

The thermal barrier coating step (s1) is a step of applying a coating liquid containing a thermal barrier material to prevent leakage of radiant heat to one surface of the base layer (3).

The thermal barrier drying step (s2) is a step of drying or curing the thermal barrier layer 1 with a microwave wave, without causing cracks on the surface of the thermal barrier layer 1, and being included in the coating liquid of the thermal barrier layer 1 In order to reduce the content of the solvent, the frequency of the microwave wave is preferably in the range of 300 MHz to 300 GHz, particularly preferably in the range of 500 MHz to 100 GHz. Moreover, the irradiation time of a microwave wave becomes like this. Preferably it is the range of 10 second-40 second, Especially preferably, it is used in the range of 20 second-30 second.

Adhesive coating step (s3) is a step of applying a coating solution containing an adhesive to be bonded to the thermal barrier layer 1 on one surface of the protective layer (4).

In the adhesive drying step (s4), the cracking of the surface of the adhesive layer does not occur and the adhesive layer (the frequency range and irradiation time of the microwave in the heat-drying drying step in order to reduce the content of the organic solvent contained in the coating liquid of the adhesive layer 2) 2) drying or curing.

According to another embodiment of the present invention, the manufacturing method further includes a lamination step (s5). The lamination step s5 is a step of laminating the thermal barrier layer 1 and the adhesive layer 2 to protect the thermal barrier layer 1. Positioning the thermal barrier layer 1 between the base layer layer 3 and the protective layer 4 prevents the thermal barrier material of the thermal barrier layer 1 from being destroyed by ultraviolet rays, thereby preventing the thermal barrier layer 1 from being removed. To protect and increase light and moisture resistance.

According to another embodiment of the present invention, the manufacturing method may further have a scratch prevention coating step (s6). The scratch prevention coating step (s6) is a process of forming a scratch prevention layer (5) on the opposite surface of the substrate layer (3) on which the thermal barrier layer 1 is formed to protect the outer surface of the substrate layer.

According to another embodiment of the present invention, the manufacturing method may further have an adhesive coating step (s7) and the adhesive drying step (s8). Adhesive coating step (s7) is a process of forming the adhesive layer (6) on the opposite side of the adhesive layer (2) of the protective layer (4) to adhere to the glass of the building or vehicle, the adhesive drying step (s8) It is a step of drying or curing the adhesive layer 6 in the irradiation time of the microwave in the thermal barrier drying step (s2).

Meanwhile, in order to protect the adhesive layer 6 after the adhesive drying step (s7) and to easily separate the thermal barrier film during winding or lamination of the thermal barrier film, the release paper 7 is laminated on one surface of the adhesive layer 6. It may further include a release paper stack step (s9), which should also be construed as falling within the scope of the present invention.

Applicants will be described below with the optimum irradiation time of microwave waves that can be dried without cracks on the surface of the thermal barrier layer and the adhesive layer, and the content of the optimum organic solvent to prevent cracks on the surface of the adhesive layer. It was found through the same experiment.

(1) Preparation of Psalms

1) Test Example 1

80 g of inorganic oxide ATO (antimony tin oxide) with an average particle size of 80 nm and 30% of surface-modified solid solution was added to 100 g of 30% acrylic binder solid solution, and 20 g of organic solvent MEK and EA (Ethyl acetate) were added and mixed for one hour. Manufacture thermal barrier materials. The thermal barrier material was applied to a base material layer made of PET, and a thermal barrier layer having a thickness of 4 μm was formed, and the specimen layer was cut into 145 mm x 145 mm lengths to prepare a specimen (that is, a thermal barrier material). Only inorganic oxides are added). The drying device used was microwave chamber (3kw class laboratory, Korea high frequency application) and dried for 30 seconds at 800 watts power and 4 GHz frequency.

Meanwhile, 100 g of the organic solvent MEK (methylethylketone) (that is, 100 parts by weight of the organic solvent in 100 parts of the acrylic copolymer) was added to 100 g of the solid solution of n-butyl methacrylate copolymer (40%). The mixture was blended for 30 minutes, and 1.5 g of aluminum chelate as a crosslinking agent was added thereto, followed by another 30 minutes to prepare an adhesive. The adhesive was applied to a protective layer formed of PET to form an adhesive layer having a thickness of 4 μm to 5 μm, and the specimen was prepared by cutting the protective layer on which the adhesive layer was formed to a width of 145 mm x 145 mm. At this time, the drying device is a microwave chamber (3kw class laboratory, Korea high frequency application equipment), at this time it is dried 30sec at microwave power 800w, frequency 4GHz.

2) Test Example 2

In Test Example 1, the specimen of the substrate layer on which the thermal barrier layer was formed was prepared under the same conditions as Test Example 1, except that 0.12 g of an organic compound, Dimonium dye, was further added to the thermal barrier material during the manufacturing of the thermal barrier material. It was prepared (that is, mixed with an inorganic oxide and an organic compound as a thermal barrier material).

In Test Example 1, the specimen of the protective layer on which the adhesive layer was formed was prepared under the same conditions as in Test Example 1 except that 50 g of the organic solvent MEK (that is, 50 parts by weight of the organic solvent in 100 weight of the acrylic copolymer) was added.

3) Test Example 3

In Test Example 1, the specimen of the substrate layer on which the thermal barrier layer was formed was removed ATO, which is an inorganic oxide, in the process of manufacturing the thermal barrier material, and 0.12 g of an organic compound Dimonium dye and 0.3 g of phthalocyanine were added to the thermal barrier material. A specimen was prepared under the same conditions as in Test Example 1 except that it was blended in (in other words, only organic compounds were added as a thermal barrier material).

In Test Example 1, the specimen of the protective layer on which the adhesive layer was formed was prepared under the same conditions as in Test Example 1 except that 40 g of the organic solvent MEK (that is, 40 parts by weight of the organic solvent in 100 weight of the acrylic copolymer) was added.

4) Test Example 4

In Test Example 1, the specimen of the protective layer on which the adhesive layer was formed was prepared under the same conditions as in Test Example 1 except that 50 g of the organic solvent MEK (that is, 110 parts by weight of the organic solvent in 100 weight of the acrylic copolymer) was added.

5) Comparative Example 1

In Test Example 2, the base layer on which the thermal barrier layer was formed was hot air dried using a hot air drying apparatus of model CO-150 sold by Hanyang Science, and the temperature of the hot air drying apparatus was 150 ° C., and the irradiation time was 10 minutes.

6) Experiment

① Experiment 1: Surface appearance observation

Applicant shows a surface photograph dried with microwaves for Test Example 2 in FIG. 5, and a surface photograph dried with hot air for Comparative Example 2 is shown in FIG. 6.

The surface photograph is a HITACHI (JAPAN) S-2400 scanning electron microscope (SEM) image taken at 500x magnification at 20kw.

Experiment 2: Irradiation time and surface condition of microwave wave

Applicant looked at the coating surface state according to the microwave irradiation time for the thermal barrier layer of Test Examples 1, 2, 3 and the adhesive layer of Test Example 4. The results are shown in Table 1 below. In addition, a graph showing the content of the organic solvent of the coating according to the irradiation time of the microwave wave is shown in FIG.

division Coating layer Surface condition over time after micro irradiation (sec) 5 10 15 20 30 35 40 Test Example 1 Thermal barrier floor × × △ ○ ○ ◇ ◇ Test Example 2 Thermal barrier floor × × △ ○ ○ ◇ ◇ Test Example 3 Thermal barrier floor × × △ ○ ○ ◇ ◇ Test Example 4 Adhesive layer × × × △ ○ ◇ ◇

※ In Table 1, x is a state in which surface drying is poor, (triangle | delta) is a state in which residual organic solvent remains a little, (circle) is a good state of surface drying, and (◇) is a state in which a crack generate | occur | produced or a surface defect occurred.

③ Experiment 3: Surface Condition According to Weight Ratio of Organic Solvent in Adhesive Layer

The adhesive layers of Test Examples 1, 2, 3, and 4 were made by varying the weight of the organic solvent in 100 weight of the acrylic copolymer, and the specimens were converted into a microwave chamber (for 3kw laboratory, Korean high frequency applications). The surface condition after drying 20 sec to 30 sec at a frequency of 4 GHz was examined. The results are shown in Table 2 below.

 division Test Example 1 Test Example 2 Test Example 3 Test Example 4 An adhesive layer comprising 100 parts by weight of an organic solvent in 100 parts by weight of an acrylic copolymer Adhesive layer containing 50 parts by weight of an organic solvent in an acrylic copolymer weight of 100 An adhesive layer comprising 40 parts by weight of an organic solvent in 100 weight of acrylic copolymer Adhesive layer containing 110 parts by weight of an organic solvent in an acrylic copolymer weight of 100 Surface condition of adhesive layer        ○         ○         ◇         △

                              <Microwave irradiation time: 20 seconds ~ 30 seconds>

※ In Table 1, △ is a state where some residual organic solvent remains, ○ is a state where the surface is uniformly dried, ◇ is a state in which cracks or surface defects occur.

(2) consideration

1) In the test 1, as shown in Figure 5, it was confirmed that the surface of the coating layer of the thermal barrier layer dried using microwave waves is uniformly dried and there is no crack. On the other hand, as shown in FIG. 6, the surface of the coating layer of the thermal barrier layer dried by hot air drying was dried for 10 minutes at a temperature of 150 ° C. and a drying time to satisfy conditions such as microwave waves, but the surface of the coating layer was destroyed. Could confirm.

Therefore, it is possible to obtain a high quality coating layer without cracks by drying with microwave waves than hot air drying, and it is possible to dry with microwave waves in less time (30 seconds) than hot air drying, thereby improving productivity and reducing manufacturing costs. Seems.

2) In Test 2, as can be seen in Table 1, it was confirmed that the surface drying is good when the microwave irradiation time is between 20 seconds and 30 seconds, the test specimen is more than 30 seconds Both cracks or surface defects were confirmed. Therefore, the irradiation time of the microwave wave dried without cracking of the coating layer was confirmed to be in the range of 20 seconds to 30 seconds.

In the meantime, the thermal barrier layer of Test Example 1 used inorganic oxide as the thermal barrier material, and the thermal barrier layer of Test Example 2 was mixed with the inorganic oxide and the organic oxide as the thermal barrier material, and the thermal barrier layer of Test Example 3 was the thermal barrier material. As an organic oxide was mixed and used as shown in Table 1, it was found that the surface state of the thermal barrier layer was the same according to the irradiation time of the microwave wave irrespective of the thermal barrier material. Therefore, the surface state after drying of the thermal barrier layer is determined by the irradiation time of the microwave wave. Although not shown, the irradiation time may vary depending on the frequency range of the microwave wave and the output power. However, this is only a slight difference, and thus, the reference factor for uniformly drying the surface of the thermal barrier layer without cracking is micro. It is judged that it is the irradiation time of a wave wave.

7 is a graph showing the organic solvent content rate according to the irradiation time of the microwave wave of the present invention.

Referring to FIG. 7, Test Examples 1, 2, and 3 used a thermal barrier layer as a specimen, and Test Example 4 used an adhesive layer as a specimen, when the microwave irradiation time ranges from 20 seconds to 30 seconds. It was found that the water content of the organic solvent contained in the coating of the specimen did not change. It is judged that the specimen is dried because there is no organic solvent to be evaporated.

3) In the test 3, referring to Table 2, the surface state after drying of the adhesive layer of Test Example 1 and Test Example 2 is good, the adhesive layer of Test Example 3 contains 40 parts by weight of the organic solvent in the acrylic copolymer 100 weight And it was dried, but cracks occurred and defects were observed. It is judged that cracks or defects are observed after drying due to high viscosity of the coating solution of the adhesive layer blended due to the low weight ratio of the organic solvent.

On the other hand, the adhesive layer of Test Example 4 contained 110 parts by weight of the organic solvent in the weight of the acrylic copolymer 100 and dried, but it was observed that the remaining organic solvent slightly remaining. It is judged that the microwave wave irradiation time is required because of the large amount of organic solvent, but if a large amount of organic solvent is blended into the coating liquid of the adhesive layer, the organic solvent may volatilize and cause air pollution, and more heat than necessary is required. Since it may cause excessive energy waste, it is not desirable to extend the microwave wave irradiation time.

Therefore, referring to Table 2, it is preferable that the organic solvent included in the adhesive layer is formed from 50 to 100 parts by weight of the organic solvent in 100 weight of the acrylic copolymer.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various, substitutions, modifications, and alterations can be made within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The present invention has the following effects by the above configuration.

The thermal barrier film of the present invention can dry or harden the thermal barrier layer, the adhesive layer, and the adhesive layer of the thermal barrier film at high speed by a dielectric heating method using microwaves, thereby improving productivity, lowering manufacturing costs, and reducing energy costs. This has the effect of saving.

The thermal barrier film of the present invention provides an effect that the surface of the coating layer is dried or cured with microwaves so that there is no crack.

The thermal barrier film of the present invention, by installing the thermal barrier film using a microwave wave on a glass window of a building or a vehicle can see the landscape outside the window transparently without reluctance, and prevents radiant heat from being incident as it is, the summer outside air temperature is high It prevents a rapid rise in the room temperature of a vehicle parked in the city and has a high visibility during day and night driving.

In the method of manufacturing a thermal barrier film of the present invention, drying the thermal barrier layer coated on the base layer with microwave waves, drying the adhesive layer coated on the protective layer with microwave waves, laminating the thermal barrier layer and the adhesive layer By the step, the organic solvent, which is a heat shielding material, is decomposed by ultraviolet rays, so that the interface of the heat shielding layer is not collapsed, and the heat shielding material of the heat shielding layer can be protected from ultraviolet rays by overlapping the base layer and the protective layer. This has the effect that the moisture resistance as well as the light resistance can be increased.

In the method for manufacturing a thermal barrier film of the present invention, by drying or curing a thermal barrier layer, an adhesive layer, and an adhesive layer using microwave waves, organic solvents contained in the coating liquid blended into the respective layers can be reduced, which is compatible with the environment. Has an effect.

Claims (13)

It includes a base layer formed with a thermal barrier layer to block the radiant heat flowing in and out of the room, the protective layer formed with an adhesive layer that can be bonded to the thermal barrier layer, Thermal barrier film, characterized in that the thermal barrier layer and the adhesive layer is dried by microwave waves. The method of claim 1, A thermal barrier film, wherein the microwave wave is irradiated in a range of 20 seconds to 30 seconds to prevent cracking of the surface after drying of the thermal barrier layer or the adhesive layer. delete The method according to claim 1 or 2, wherein the adhesive layer, Thermal barrier film, characterized in that it comprises an organic solvent formed in 50 to 100 parts by weight of 100 parts by weight of the acrylic copolymer. The method of claim 4, wherein the base layer, A thermal barrier film, characterized in that further comprises a scratch prevention layer on the opposite side of the heat shield layer of the base layer to protect the outer surface. The method of claim 4, wherein the protective layer, Further comprising an adhesive layer on the opposite side of the adhesive layer of the protective layer to adhere to the glass, such as buildings or vehicles, The adhesive layer is a thermal barrier film, characterized in that dried by microwave waves. A heat shield coating step of forming a heat shield layer capable of preventing the inflow and exit of radiant heat on one surface of the base layer, a heat shield drying step of drying or curing the heat shield layer with a microwave wave, and the heat shield layer on one surface of a protective layer; A method of manufacturing a thermal barrier film comprising an adhesive coating step of forming an adhesive layer to be bonded, and an adhesive drying step of drying or curing the adhesive layer with a microwave wave. The method of claim 7, wherein the thermal barrier drying step or adhesive drying step, A method for producing a thermal barrier film, wherein the microwave wave is irradiated in a range of 20 seconds to 30 seconds so that the surface after drying of the thermal barrier layer or the adhesive layer does not generate cracks. delete The method of claim 7 or 8, wherein the adhesive layer, Method for producing a thermal barrier film, characterized in that it comprises an organic solvent of 50 to 100 parts by weight in 100 parts by weight of the acrylic copolymer. The method of claim 10, further comprising a lamination step of laminating the thermal barrier layer and the adhesive layer in order to protect the thermal barrier layer. 12. The method of claim 11, further comprising a scratch prevention coating step of forming a scratch prevention layer on the opposite surface of the substrate layer on which the thermal barrier layer is formed to protect the outer surface of the substrate layer. The method of claim 11, And an adhesive coating step of forming an adhesive layer on a surface opposite to the adhesive layer of the protective layer so as to adhere to the glass of the building or the vehicle. The adhesive layer is a method of manufacturing a thermal barrier film, characterized in that it further comprises an adhesive drying step that is dried or cured with a microwave wave.

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