KR20220089791A - Exterior Film of Building for protecting glass - Google Patents

Abstract

The present invention is a building film for protecting glass, and has excellent weather resistance, impact resistance and scratch resistance by a base layer laminated with thermoplastic polyurethane and a functional coating layer, has self-healing ability, and heat by ultraviolet and infrared rays It relates to a building film for protecting glass, which can improve the durability of the glass by effectively blocking it.

Description

Architectural film for protecting glass {Exterior Film of Building for protecting glass}

The present invention is a building film for protecting glass, and has excellent weather resistance, impact resistance and scratch resistance by a base layer laminated with thermoplastic polyurethane and a functional coating layer, has self-healing ability, and heat by ultraviolet and infrared rays It relates to a building film for protecting glass, which can improve the durability of the glass by effectively blocking it.

In general, a film attached to the outside of the building glass is called an exterior film or a building film. Recently, with the development of architectural technology and architectural design, many buildings with the entire exterior wall of a building made of glass or low-e glass are being built, and the market for building films that can save energy while protecting the internal environment of the building is gradually expanding. have.

US Patent No. 9,303,132 (EXTERIOR WINDOW FILM, Prior Patent 1) discloses a film for construction having a double structure consisting of a PET layer and a PET layer. Existing architectural films, including those disclosed in Prior Patent 1, have a base layer composed of a double structure of PET-PET or PET-PMMA, but PET and PMMA have relatively high hardness properties, so glass is damaged by external impact. There is a problem that

In addition, the existing PET and PMMA construction films have a problem in that the surface of the product is easily aged as it is continuously exposed to climatic environments such as temperature, humidity, and ultraviolet rays. In particular, when the film for construction is attached to the surface of the low-e glass, there is a problem in that an inert gas such as argon gas leaks due to the aging of the film and the function of the low-e glass is deteriorated.

(Patent Document 0001) Patent Document 1: US Registered Patent US9,303,132

An object of the present invention is to have excellent weather resistance, impact resistance and scratch resistance by a base layer on which a thermoplastic polyurethane is laminated, and a functional coating layer, have self-healing ability, and effectively block heat caused by ultraviolet and infrared rays. It is to provide an architectural film for protecting glass, which can improve the.

In order to solve the above problems, an embodiment of the present invention provides a building film for protecting glass, comprising: a functional coating layer comprising a urethane-based material or an acrylic-based material; a base layer disposed under the functional coating layer and laminated with a thermoplastic polyurethane; and a second adhesive layer disposed under the base layer and comprising an acrylic copolymer, a curing agent, a solvent, and a UV blocking agent; wherein the base layer includes, a TPU layer comprising a thermoplastic polyurethane; a first adhesive layer disposed under the TPU layer and comprising a urethane resin, a curing agent, carbon, a metal oxide, and a UV blocking agent; and a PET layer disposed under the first adhesive layer and comprising a metal-treated polyethylene terephthalate, wherein the functional coating layer self-restores or prevents scratches generated on the surface of the building film. to provide.

In some embodiments of the present invention, the building film includes 2 to 20 parts by weight of a UV blocker, 1 to 10 parts by weight of the UV blocker is added to the first adhesive layer, and 1 to 10 parts by weight of the UV blocker is the second It may be added to the adhesive layer.

In some embodiments of the present invention, the functional coating layer may include 75 to 90 parts by weight of a urethane resin, and 15 to 60 parts by weight of an isocyanate curing agent.

In some embodiments of the present invention, the functional coating layer may include 50 to 70 parts by weight of an acrylic oligomer, 30 to 50 parts by weight of a monofunctional and polyfunctional acrylic monomer, 1 to 5 parts by weight of a photoinitiator, and 0.1 to 3 parts by weight of a slip additive. can

In some embodiments of the present invention, the functional coating layer may further include 0.5 to 3 parts by weight of an antibacterial additive.

In some embodiments of the present invention, the first adhesive layer includes 90 to 110 parts by weight of a urethane resin, 0.1 to 5 parts by weight of a curing agent, 1 to 20 parts by weight of carbon, 1 to 20 parts by weight of a metal oxide, and 1 to 10 parts by weight of a UV blocker. It may contain parts by weight.

In some embodiments of the present invention, the metal oxide may include at least one of WO ₃ , ATO, and ITO.

In some embodiments of the present invention, the second adhesive layer may include 80 to 100 parts by weight of an acrylic copolymer, 0.5 to 2.5 parts by weight of a curing agent, 30 to 50 parts by weight of a solvent, and 1 to 10 parts by weight of a UV blocker.

In some embodiments of the present invention, the thickness of the functional coating layer is 2 to 40 micrometers, the thickness of the TPU layer is 10 to 100 micrometers, the thickness of the first adhesive layer is 2 to 30 micrometers, and the The thickness of the PET layer may be 12 to 100 micrometers, and the thickness of the second adhesive layer may be 2 to 30 micrometers.

In some embodiments of the present invention, the building film may block 99% or more of ultraviolet rays, and may block 40 to 99% of infrared rays.

According to an embodiment of the present invention, it is possible to exhibit the effect of improving the weather resistance, durability, and impact resistance of the building film by the base layer laminated with thermoplastic polyurethane.

According to an embodiment of the present invention, as the functional coating layer is formed on the upper surface of the substrate layer to which the TPU layer is laminated, the effect of self-restoring or preventing scratches that may be generated on the surface of the building film to improve scratch resistance properties can exert

According to an embodiment of the present invention, the composition for forming the first adhesive layer can exhibit the effect of effectively blocking ultraviolet rays and infrared rays incident into the glass to which the building film is attached.

According to an embodiment of the present invention, by laminating the TPU layer and the PET layer as a first adhesive layer containing carbon and metal oxide, UV and infrared rays are blocked in advance to prevent discoloration of the PET layer and improve durability can exert

According to an embodiment of the present invention, when the building film is attached to the surface of the low-e glass, heat by ultraviolet and infrared rays incident on the glass is blocked, thereby minimizing the expansion and contraction of the argon gas layer, and improving the durability of the glass. It can have an improvement effect.

According to an embodiment of the present invention, as the UV blocker is dispersed and added to the two adhesive layers, it is possible to exhibit the effect of preventing the deterioration of the physical properties of each adhesive layer.

1 schematically shows a laminated structure of a building film according to an embodiment of the present invention.
2 schematically shows a laminated structure of a building film according to an embodiment of the present invention.
3 schematically shows the durability test results of Examples and Comparative Examples of a building film according to an embodiment of the present invention.
4 schematically shows yellowing test results of Examples and Comparative Examples of a building film according to an embodiment of the present invention.
5 schematically shows the impact resistance test results of Examples and Comparative Examples of a building film according to an embodiment of the present invention.
6 schematically shows the scratch test results of Examples and Comparative Examples of a building film according to an embodiment of the present invention.

Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of one or more aspects. However, it will also be recognized by one of ordinary skill in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain illustrative aspects of one or more aspects. These aspects are illustrative, however, and some of various methods may be employed in the principles of the various aspects, and the descriptions set forth are intended to include all such aspects and their equivalents.

As used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. may not be construed as an advantage or advantage in any aspect or design being described over other aspects or designs. .

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from context, "X employs A or B" is intended to mean one of the natural implicit substitutions. That is, X employs A; X employs B; or when X employs both A and B, "X employs A or B" may apply to either of these cases. It should also be understood that the term “and/or” as used herein refers to and includes all possible combinations of one or more of the listed related items.

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. should be understood as not

In addition, it will be understood that singular expressions such as "above" and "above" include plural expressions in this specification, unless otherwise clearly indicated. Thus, as an example, a “component surface” includes one or more component surfaces.

Also, terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, the terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are generally understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning as Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in an embodiment of the present invention, an ideal or excessively formal meaning is not interpreted as

Construction Film (1) Structure

1 schematically shows a laminated structure of a building film 1 according to an embodiment of the present invention.

In the building film 1 for protecting glass according to an embodiment of the present invention, the functional coating layer 100 comprising a urethane-based material or an acrylic-based material; The functional coating layer 100 is disposed under the base layer 200, the thermoplastic polyurethane is laminated; and a second adhesive layer 300 disposed under the base layer 200 and comprising an acrylic copolymer, a curing agent, a solvent, and a UV blocking agent; and the base layer 200 is made of a thermoplastic polyurethane. TPU layer including 210; a first adhesive layer 220 disposed under the TPU layer 210 and comprising a urethane resin, a curing agent, carbon, a metal oxide, and a UV blocking agent; and a PET layer 230 disposed under the first adhesive layer 220 and comprising a metal-treated polyethylene terephthalate, wherein the functional coating layer 100 is generated on the surface of the building film 1 It can self-restore or prevent scratches.

As shown in FIG. 1 , the building film 1 according to an embodiment of the present invention has a functional coating layer 100 , a base layer 200 disposed under the functional coating layer 100 , and the base layer 200 . ) may include a second adhesive layer 300 disposed on the lower side. In addition, the base layer 200 includes a TPU layer 210 , a first adhesive layer 220 disposed under the TPU layer 210 , and a PET layer 230 disposed under the first adhesive layer 220 . ) may be included.

That is, the building film 1 is the functional coating layer 100 , the TPU layer 210 , the first adhesive layer 220 , the base layer 200 including the PET layer 230 , and the A second adhesive layer 300 may be included.

The functional coating layer 100 may include a urethane-based material or an acrylic-based material. In one embodiment of the present invention, the functional coating layer 100 may include a urethane resin, and an isocyanate curing agent.

Existing architectural films have a feature that the occurrence of scratches is relatively small because a hard coating layer is formed on the surface. However, due to the high hardness of the hard coating layer, there is a problem that is vulnerable to external impact.

In order to solve this problem, the building film (1) of the present invention was formed with the functional coating layer (100) containing the above components on the surface. In this case, the functional coating layer 100 may exhibit high elasticity, thereby preventing glass breakage due to external impact. For example, when a sparrow collides with the glass of a building, damage to the glass can be prevented due to the impact resistance property of the functional coating layer 100 .

That is, by forming the functional coating layer 100, it is possible to implement the building film 1 having excellent impact resistance.

Preferably, the building film 1 includes the functional coating layer 100 made of a urethane-based material having a very high elasticity, thereby preventing glass breakage due to external impact.

Preferably, the functional coating layer 100 according to an embodiment of the present invention may include 75 to 90 parts by weight of a urethane resin, and 15 to 60 parts by weight of an isocyanate curing agent.

The composition range of the functional coating layer 100 as described above corresponds to a range capable of implementing self-restoring properties. At this time, the functional coating layer 100 corresponds to the self-healing layer.

That is, as the functional coating layer 100 is made of the above composition, it is possible to implement a self-healing ability suitable for self-recovery of scratches generated on the surface of the building film 1 . For example, when a scratch is generated on the glass of a building due to a sandstorm, the scratch can be restored due to the self-healing ability of the functional coating layer 100 .

That is, by forming the functional coating layer 100, the building film 1 can maintain a clean surface.

Preferably, as the functional coating layer 100 having self-healing ability is formed, scratches that may be generated on the surface of the building film 1 can be self-restored to exhibit the effect of improving scratch resistance properties.

The functional coating layer 100 according to an embodiment of the present invention may further include 0.5 to 3 parts by weight of an antibacterial additive. In this case, the functional coating layer 100 can implement antibacterial performance.

On the other hand, the base layer 200 is disposed below the functional coating layer 100, and a thermoplastic polyurethane (TPU) may be laminated. In an embodiment of the present invention, the base layer 200 may correspond to the TPU laminated base layer 200 .

The existing building film has a base layer 200 having a double structure of PET-PET or PET-PMMA. However, when PET and PMMA are exposed to a climatic environment, their physical properties are deteriorated, and thus there is a problem in that the weather resistance is not good.

In order to solve this problem, in the present invention, the TPU layer 210 was laminated on the PET layer 230 using the first adhesive layer 220 to form the base layer 200 . That is, the building film 1 of the present invention may include the base layer 200 having a double structure of TPU-PET.

The TPU layer 210 constituting the base layer 200, in an embodiment of the present invention, is disposed below the functional coating layer 100, and may include a thermoplastic polyurethane. Preferably, the TPU layer 210 may include non-yellowing thermoplastic polyurethane.

Thermoplastic polyurethane is a material that takes a very long time to break. In particular, non-yellowing thermoplastic polyurethane is a material with excellent durability against UV rays. The TPU layer 210 including such a thermoplastic polyurethane may have excellent durability due to ultraviolet rays.

That is, by laminating the TPU layer 210 to form the base layer 200, it is possible to implement the building film 1 having excellent weather resistance and durability.

In addition, thermoplastic polyurethane is a material having high elasticity. The TPU layer 210 including such a thermoplastic polyurethane may exhibit high elasticity, thereby preventing glass breakage due to external impact.

That is, by laminating the TPU layer 210 to form the base layer 200 , it is possible to implement the building film 1 having excellent impact resistance.

Preferably, the effect of improving the weather resistance, durability, and impact resistance of the building film 1 by the base layer 200 on which the thermoplastic polyurethane is laminated can be exhibited.

In addition, the first adhesive layer 220 constituting the base layer 200, in an embodiment of the present invention, is disposed below the TPU layer 210, a urethane resin, a curing agent, carbon, a metal oxide, and UV blocking agents.

Preferably, the first adhesive layer 220 according to an embodiment of the present invention is 90 to 110 parts by weight of a urethane resin, 0.1 to 5 parts by weight of a curing agent, 1 to 20 parts by weight of carbon, 1 to 20 parts by weight of a metal oxide , and 1 to 10 parts by weight of a UV blocker.

Carbon, which is one of the components of the first adhesive layer 220 , may block infrared rays in a relatively low wavelength band. In addition, carbon has a kind of tinting effect and can block part of visible light.

The metal oxide, which is one of the components of the first adhesive layer 220 , may block infrared rays of a relatively high wavelength band. In an embodiment of the present invention, the metal oxide may include at least one of WO ₃ , ATO, and ITO.

The UV blocking agent, which is one of the components of the first adhesive layer 220, may block UV rays harmful to the human body, such as skin and eyes.

The composition range of the first adhesive layer 220 as described above corresponds to a range capable of implementing an ultraviolet and infrared blocking function while having adhesiveness. Preferably, the building film 1 according to an embodiment of the present invention may block 99.99% or more of ultraviolet rays, and may block 80% or more of infrared rays.

That is, the composition for forming the first adhesive layer 220 can exhibit an effect of effectively blocking ultraviolet and infrared rays incident into the glass to which the building film 1 is attached.

In addition, the PET layer 230 constituting the base layer 200 may be disposed below the first adhesive layer 220 and include metal-treated polyethylene terephthalate (PET).

The metal-treated polyethylene terephthalate corresponds to a polymer film coated with a thin metal layer. The thin metal layer may include at least one of aluminum, nickel, and chromium.

However, the metal-treated polyethylene terephthalate according to the present invention is not limited thereto, and may include any metal-treated polyethylene terephthalate generally used in the field of architectural films.

In one embodiment of the present invention, by laminating the TPU layer 210 to the PET layer 230 as the first adhesive layer 220 , it is possible to solve the weather resistance issue of the existing PET material substrate layer 200 . .

More specifically, the PET layer ( 230) can exhibit the effect of preventing discoloration and improving durability.

In addition, when the building film (1) of the present invention is attached to the surface of low-e glass, heat caused by ultraviolet and infrared rays incident on the glass is blocked, thereby minimizing the expansion and contraction of the argon gas layer, and improving the durability of the glass It can have the effect of making

Meanwhile, the second adhesive layer 300 is disposed below the PET layer 230 and may include an acrylic copolymer, a curing agent, a solvent, and a UV blocking agent.

Preferably, the second adhesive layer 300 may include 80 to 100 parts by weight of an acrylic copolymer, 0.5 to 2.5 parts by weight of a curing agent, 30 to 50 parts by weight of a solvent, and 1 to 10 parts by weight of a UV blocker.

The composition range of the second adhesive layer 300 as described above corresponds to a range that can implement a UV blocking function while having adhesiveness.

The building film 1 according to an embodiment of the present invention contains 2 to 20 parts by weight of a UV blocker, 1 to 10 parts by weight of the UV blocker is added to the first adhesive layer 220, and the UV blocker 1 to 10 parts by weight may be added to the second adhesive layer 300 .

As described above, each of the first adhesive layer 220 and the second adhesive layer 300 includes 1 to 10 parts by weight of a UV blocker.

That is, in the present invention, the UV blocking agent was added by dispersing the first adhesive layer 220 and the second adhesive layer 300 . Accordingly, it is possible to prevent deterioration of physical properties such as UV blocking, infrared blocking, and adhesive strength expressed by the composition of each layer.

Preferably, as the UV blocking agent is dispersed and added to the two adhesive layers, it is possible to exhibit the effect of preventing the deterioration of the physical properties of each adhesive layer.

On the other hand, as shown in FIG. 1 , the release film 400 disposed under the second adhesive layer 300 may further include. In one embodiment of the present invention, the release film 400 may include a silicone release film.

The release film 400 may protect the second adhesive layer 300 until the building film 1 is attached to the low-e glass.

In addition, it is preferable that the release film 400 has a weak peeling force because it must be easily removed by the installer when the building film 1 is attached. In one embodiment of the present invention, the release film 400 has a weak peeling force and is attached to the second adhesive layer 300, and even if time elapses, the general release film 400 is difficult to have strong peeling force. may include all of them.

On the other hand, as shown in FIG. 1 , the building film 1 may further include a protective film layer 500 disposed on the functional coating layer 100 and including a silicone protective film.

The protective film layer 500 may protect the functional coating layer 100 before and after attaching the building film 1 to the glass. For example, the protective film layer 500 may prevent contamination that may be generated while pressure is applied to the surface of the functional coating layer 100 during the film construction process.

As shown in FIG. 1 , the building film 1 according to an embodiment of the present invention has a layered structure in which the functional coating layer 100 , the base layer 200 , and the second adhesive layer 300 are laminated. can have

In more detail, the building film 1 is the functional coating layer 100 , the TPU layer 210 , the first adhesive layer 220 , and the base material layer 200 including the PET layer 230 . ), and the second adhesive layer 300 may have a laminated layered structure.

The thickness of the functional coating layer 100 according to an embodiment of the present invention is 2 to 40 micrometers, the thickness of the TPU layer 210 is 10 to 100 micrometers, and the thickness of the first adhesive layer 220 is is 2 to 30 micrometers, the thickness of the PET layer 230 is 12 to 100 micrometers, and the thickness of the second adhesive layer 300 is 2 to 30 micrometers.

In addition, the thickness of the release film 400 according to an embodiment of the present invention is 12 to 50 micrometers, and the thickness of the protective film layer 500 is 20 to 100 micrometers.

As each layer constituting the building film 1 of the present invention is formed in the thickness range as described above, it has excellent weather resistance, impact resistance, and scratch resistance, has self-healing ability, and effectively absorbs heat caused by ultraviolet and infrared rays. By blocking, it is possible to provide the building film 1 capable of improving the durability of glass.

2 schematically shows a laminated structure of a building film 1 according to an embodiment of the present invention.

As shown in FIG. 2 , the building film 1 according to an embodiment of the present invention has a functional coating layer 100 , a substrate layer 200 disposed under the functional coating layer 100 , and the substrate layer 200 . ) may include a second adhesive layer 300 disposed on the lower side. In addition, the base layer 200 includes a TPU layer 210 , a first adhesive layer 220 disposed under the TPU layer 210 , and a PET layer 230 disposed under the first adhesive layer 220 . ) may be included.

The TPU layer 210 , the first adhesive layer 220 , and the base layer 200 including the PET layer 230 , the second adhesive layer 300 , and the release film 400 are It has the same characteristics, thickness, and effect as the above-described components.

As described above, the functional coating layer 100 may include a urethane-based material or an acrylic-based material.

In an embodiment of the present invention, the functional coating layer 100 may include an acrylic oligomer, monofunctional and polyfunctional acrylic monomers, a photoinitiator, and a slip additive.

Preferably, the functional coating layer 100 may include 50 to 70 parts by weight of an acrylic oligomer, 30 to 50 parts by weight of a monofunctional and polyfunctional acrylic monomer, 1 to 5 parts by weight of a photoinitiator, and 0.1 to 3 parts by weight of a slip additive. have.

The composition range of the functional coating layer 100 as described above corresponds to a range capable of implementing high hardness. At this time, the functional coating layer 100 corresponds to the hard coating layer.

That is, as the functional coating layer 100 has the above composition, scratches that may be generated on the surface of the building film 1 can be prevented. At the same time, it is possible to prevent contamination that may occur from the outside.

That is, by forming the functional coating layer 100, the building film 1 can maintain a clean surface.

Preferably, as the functional coating layer 100 is formed on the upper surface of the substrate layer 200 on which the TPU layer 210 is laminated, scratches that may be generated on the surface of the building film 1 are prevented and scratch resistance It can exhibit the effect of improving a characteristic.

The functional coating layer 100 according to an embodiment of the present invention may further include 0.5 to 3 parts by weight of an antibacterial additive. In this case, the functional coating layer 100 may implement antibacterial performance.

In addition, the functional coating layer 100 according to an embodiment of the present invention can suppress the formation of a contamination layer on the surface while continuously maintaining the antibacterial performance by the combination of the antibacterial additive and the slip additive.

That is, in one embodiment of the present invention, the building film 1 is, as shown in FIG. 1 , a functional coating layer 100 having self-healing ability on the substrate layer 200 on which the TPU layer 210 is laminated. can be made with

In addition, in another embodiment of the present invention, the building film 1 is, as shown in FIG. 2 , a functional coating layer 100 having a high hardness on the substrate layer 200 on which the TPU layer 210 is laminated. structure can be made.

Hereinafter, Examples and Comparative Examples according to the present invention will be described. In addition, the results of the characteristic tests of the Examples and Comparative Examples will be described in detail.

Example 1

A functional coating layer 100 comprising 80 parts by weight of a urethane resin and 48 parts by weight of an isocyanate on the upper surface of the TPU layer 210 having a thickness of 25 micrometers is formed to have a thickness of 12 micrometers, and the functional coating layer 100 A protective film layer 500 having a thickness of 54 micrometers was laminated on the upper surface of the .

In addition, the second adhesive layer 300 comprising 85 parts by weight of an acrylic copolymer, 0.8 parts by weight of a curing agent, 2 parts by weight of a UV blocker, and 35 parts by weight of a solvent on the lower surface of the PET layer 230 having a thickness of 23 micrometers. It was formed to have a thickness of 10 micrometers, and a release film 400 having a thickness of 23 micrometers was laminated on the lower surface of the second adhesive layer 300 .

After that, on the upper surface of the PET layer 230, 100 parts by weight of a urethane resin, 1.5 parts by weight of a curing agent, 10 parts by weight of carbon, 8 parts by weight of ceramic, and 2 parts by weight of a UV blocking agent, the first adhesive layer 220 containing 10 It was formed to have a thickness of micrometers, and the first adhesive layer 220 was laminated on the lower surface of the TPU layer 210 to prepare a building film 1 for protecting glass. That is, the stacked structure of Example 1 may have the same structure as that of FIG. 1 described above.

Comparative Example 1

Architectural film composed of general metal-treated PMMA-PET double structure

Construction Film (1) Characteristics Comparison Experiment Results

Table 1 shows the results of testing the UV blocking rate and IR blocking rate of Example 1 and Comparative Example 1 according to the present invention.

In this experiment, UV blocking rate and IR blocking rate were measured using a portable solar specifier. In the case of the measured value of UV blocking rate, it is expected that a measurement deviation of about 0.2% has occurred.

film UV blocking rate/IR blocking rate (%/%) Example 1 100 / 84.6 Comparative Example 1 99.8 / 64.8

As shown in Table 1, the UV blocking rate and IR blocking rate of Example 1 were 100 and 84.6%, respectively, and the UV blocking rate and IR blocking rate of Comparative Example 1 were 99.8 and 64.8%, respectively. That is, it can be confirmed that the building film 1 according to the embodiment of the present invention has relatively excellent UV blocking rate and IR blocking rate.

In the function of the building film 1, the UV blocking function is a function of blocking ultraviolet rays harmful to the human body, such as the eyes and skin of people inside the building. That is, as the UV blocking rate of Example 1 according to the present invention is measured to be 100%, it can be determined that the building film 1 of the present invention is effectively blocking ultraviolet rays.

In addition, in the function of the building film 1, the IR blocking function is a function of blocking infrared rays that can generate heat inside the building and on the glass. That is, as the IR blocking rate of Example 1 according to the present invention was measured to be 84.6%, it can be determined that the building film 1 of the present invention effectively blocks infrared rays compared to Comparative Example 1.

As described above, Example 1 according to the present invention can effectively block ultraviolet rays and infrared rays.

That is, as the base layer 200 is formed by laminating the TPU layer 210 to the PET layer 230 using the first adhesive layer 220 , the building film 1 according to an embodiment of the present invention is It can block ultraviolet rays and infrared rays effectively.

In one embodiment of the present invention, when the building film (1) is attached to the low-e glass, it effectively blocks heat by ultraviolet rays and infrared rays to prevent contraction/expansion of inert gases such as argon in the glass Thus, the durability of the glass can be improved.

Tables 2, 3, and 4 are results of testing the weather resistance of Example 1 and Comparative Example 1 according to the present invention. In this experiment, the building film (1) was irradiated with UV light at an amount of about 1,000 mj/cm ² for 5 hours.

3 schematically shows the durability test results of Examples and Comparative Examples of a building film 1 according to an embodiment of the present invention. In this experiment, durability was determined through visual inspection of the product surface.

3 (a) and 3 (b) schematically show a photograph of the surface of Example 1 according to the present invention, and are photographs before and after the durability test, respectively.

As a result of the durability test, in Example 1, it can be confirmed that the color of the surface was changed as it was continuously exposed to UV light. However, it can be confirmed that there is no breakage or damage to the surface itself.

3 (c) and 3 (d) schematically show a photograph of the surface of Comparative Example 1, and are photographs before and after the durability test, respectively.

As a result of the durability test, it can be confirmed that, in Comparative Example 1, the color of the PMMA layer corresponding to the surface layer was changed as the color of the PMMA layer was continuously exposed to UV light, and aging occurred rapidly. In addition, it can be seen that the film is broken due to cracks due to aging and the film layers are separated.

That is, in Example 1 and Comparative Example 1 according to the present invention, the color of the film surface was changed, but in Example 1, breakage or damage to the surface itself did not occur. Through this, it can be determined that the construction film 1 of the present invention has relatively excellent durability.

4 schematically shows the yellowing test results of Example 1 and Comparative Example 1 according to the present invention.

In this experiment, the yellowing phenomenon of the product was determined by measuring the b* value before and after the test through a spectrophotometer. As the b* value increases from green (-) to yellow (+), it means that the product has changed to yellow.

As shown in FIG. 4 , it can be confirmed that the Δb* value of Comparative Example 1 differs by about 2 times or more compared to Example 1 according to the present invention.

Table 2 summarizes the measurements measured during the yellowing test experiment. In Table 2 below, b*(start), b*(end), and Δb* mean the difference between the measured value before the yellowing test, the measured value after the yellowing test, and b* before and after the yellowing test, respectively.

film b*(start) b*(end) △b* Example 1 0.01 1.34 1.33 Comparative Example 1 0.18 2.54 2.36

As shown in Table 2, b*(start), b*(end), and Δb* of Example 1 are 0.01, 1.34, and 1.33, respectively, and b*(start), b*( end), and Δb* were found to be 0.18, 2.54, and 2.36, respectively.

4 and Table 2, it can be determined that the building film 1 according to an embodiment of the present invention has relatively excellent yellowing properties.

As described above, Example 1 according to the present invention is relatively excellent in durability and yellowing characteristics, it can be determined that the weather resistance is relatively excellent. That is, as the base layer 200 is formed by laminating the TPU layer 210 to the PET layer 230 as the first adhesive layer 220 , the weather resistance of the building film 1 according to an embodiment of the present invention is improved. can be improved

5 schematically shows the impact resistance test results of Examples and Comparative Examples of the building film 1 according to an embodiment of the present invention.

In this experiment, an impact resistance test was performed using the Gravalometer shown in FIG. 5(a). At this time, an impact was continuously applied to the surface of the film for 3 minutes using a weight attached to the equipment.

As shown in Fig. 5(b), in Example 1, damage occurred on the surface of the building film 1 after the test, but it was found that there was no abnormality in the glass to which the building film 1 was attached.

On the other hand, as shown in FIG. 5(c), in Comparative Example 1, the building film was penetrated by a weight attached to the impact resistance test equipment, and the glass surface to which the building film was attached was damaged.

As described above, it can be determined that Example 1 according to the present invention has relatively excellent shock absorption performance. That is, as the base layer 200 is formed by laminating the TPU layer 210 to the PET layer 230 as the first adhesive layer 220 , the impact resistance of the building film 1 according to an embodiment of the present invention can improve

6 schematically shows the scratch test results of Examples and Comparative Examples of a building film 1 according to an embodiment of the present invention.

In this experiment, it was confirmed whether scratches occurred on the film surface under the conditions of 500 g, 20 rpm, and 100 reciprocations using the abrasion resistance test equipment shown in FIG. 6(a).

6(b) and 6(c) schematically show a photograph of the surface of Example 1 according to the present invention, and are photographs before and after the scratch test, respectively. Example 1 corresponds to the building film 1 in which a self-healing layer is formed on the surface by the above-described composition.

As a result of the scratch test, in Example 1, although scratches occurred on the surface, it can be confirmed that the scratches were restored to a level similar to that of the initial product by the functional coating layer 100 having self-healing ability.

6 (d) and (d) schematically show a photograph of the surface of Comparative Example 1 according to the present invention, and are photographs before and after the scratch test, respectively. Comparative Example 1 corresponds to a general construction film having a hard coating layer formed on the surface.

As a result of the scratch test, it can be confirmed that in Comparative Example 1, no scratches were generated on the surface by the hard coating layer.

As described above, in Example 1 according to the present invention, scratches generated on the surface by the functional coating layer corresponding to the self-healing layer can be effectively restored.

That is, it can be determined that the functional coating layer having self-healing ability according to an embodiment of the present invention has scratch resistance similar to that of the hard coating layer. In addition, it is possible to improve the impact resistance of the film for construction.

According to one embodiment of the present invention, it is possible to exhibit the effect of improving the weather resistance, durability, and impact resistance of the building film by the base layer laminated with thermoplastic polyurethane.

According to an embodiment of the present invention, as the functional coating layer is formed on the upper surface of the base layer to which the TPU layer is laminated, the effect of improving the scratch resistance property by self-restoring or preventing scratches that may be generated on the surface of the building film can exert

According to one embodiment of the present invention, the composition for forming the first adhesive layer can exhibit the effect of effectively blocking ultraviolet rays and infrared rays incident into the glass to which the building film is attached.

According to an embodiment of the present invention, by laminating the TPU layer and the PET layer as a first adhesive layer containing carbon and metal oxide, UV and infrared rays are blocked in advance to prevent discoloration of the PET layer and improve durability can exert

According to one embodiment of the present invention, when the building film is attached to the surface of the low-e glass, heat by ultraviolet and infrared rays incident on the glass is blocked, thereby minimizing the expansion and contraction of the argon gas layer, and improving the durability of the glass. It can have an improvement effect.

According to an embodiment of the present invention, as the UV blocker is dispersed and added to the two adhesive layers, it is possible to exhibit the effect of preventing deterioration of the physical properties of each adhesive layer.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

Claims (10)

In the construction film for protecting glass,
a functional coating layer comprising a urethane-based material or an acrylic-based material;
a base layer disposed under the functional coating layer and laminated with a thermoplastic polyurethane; and
A second adhesive layer disposed under the base layer and comprising an acrylic copolymer, a curing agent, a solvent, and a UV blocking agent;
The base layer is
a TPU layer comprising a thermoplastic polyurethane;
a first adhesive layer disposed under the TPU layer and comprising a urethane resin, a curing agent, carbon, a metal oxide, and a UV blocking agent; and
and a PET layer disposed under the first adhesive layer and comprising a metal-treated polyethylene terephthalate;
The functional coating layer self-restores or prevents scratches generated on the surface of the building film, building film.
The method according to claim 1,
The building film contains 2 to 20 parts by weight of a UV blocker,
1 to 10 parts by weight of the UV blocker is added to the first adhesive layer,
1 to 10 parts by weight of the UV blocker is added to the second adhesive layer, the building film.
The method according to claim 1,
The functional coating layer comprises 75 to 90 parts by weight of a urethane resin, and 15 to 60 parts by weight of an isocyanate curing agent, a building film.
The method according to claim 1,
The functional coating layer comprises 50 to 70 parts by weight of an acrylic oligomer, 30 to 50 parts by weight of a monofunctional and polyfunctional acrylic monomer, 1 to 5 parts by weight of a photoinitiator, and 0.1 to 3 parts by weight of a slip additive.
The method according to claim 1,
The functional coating layer further comprises 0.5 to 3 parts by weight of an antibacterial additive, construction film.
The method according to claim 1,
The first adhesive layer is 90 to 110 parts by weight of a urethane resin, 0.1 to 5 parts by weight of a curing agent, 1 to 20 parts by weight of carbon, 1 to 20 parts by weight of a metal oxide, and 1 to 10 parts by weight of a UV blocker, a building film.
The method according to claim 1,
The metal oxide is WO ₃ , ATO, and comprising at least one of ITO, construction film.
The method according to claim 1,
The second adhesive layer comprises 80 to 100 parts by weight of an acrylic copolymer, 0.5 to 2.5 parts by weight of a curing agent, 30 to 50 parts by weight of a solvent, and 1 to 10 parts by weight of a UV blocker, a building film.
The method according to claim 1,
The thickness of the functional coating layer is 2 to 40 micrometers, the thickness of the TPU layer is 10 to 100 micrometers, the thickness of the first adhesive layer is 2 to 30 micrometers, and the thickness of the PET layer is 12 to 100 micrometers. and a micrometer, and the thickness of the second adhesive layer is 2 to 30 micrometers, a building film.
The method according to claim 1,
The building film blocks 99% or more of ultraviolet rays, and blocks 40 to 99% of infrared rays.

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