HARD-COATED POLYCARBONATE LAMINATED HEATED HELICOPTER GLASS

Abstract

This invention is used in the aviation industry for helicopter windshields. It is specifically designed for both civilian and military helicopters to improve pilot visibility, provide resistance to external factors, and prevent icing / condensation.

Description

1 TARIFF HARD-COATED POLYCARBONATE LAMINATED HEATING HELICOPTER WINDOW TECHNICAL FIELD This invention is used in the aviation industry, particularly in the windshields of helicopters. To improve pilot visibility in civilian and military helicopters, and to protect against external factors. To ensure durability and prevent icing / condensation, 10 It has been designed. STATE OF THE ART The heated systems used in current helicopter windshields are quite diverse, and 15 There are many versions with different layer structures. The most common ones today... The solutions used are as follows: Glass-to-glass laminated or glass and plastic (such as PET) laminated structures: Using plastic Although these systems offer the advantage of flexibility, the material is scratch-resistant. 20 It is not and leads to deterioration of surface quality with long-term use. Glass-to-glass laminated conductive oxide coated glass from Saint-Gobain and other companies. Windows: These solutions also include three-phase heating systems and ITO. Coated glass is used. However, in current systems, a 25 mm layer is placed behind the glass. The added materials may not provide adequate optical performance and are susceptible to scratching. It is not resistant. Among the existing systems is heated glass developed by Saint-Gobain. A solution exists. However, some of the glass produced by Saint-Gobain has a 30% defect. Three-phase heating systems are also available in these versions, and bird strike protection is recommended. It can pass the tests. However, these systems usually use PET film or 2 Because similar materials are used, scratch resistance is low and in the long term the pilot This can negatively affect their opinion. DEFINITION OF INVENTION The invention in question overcomes the disadvantages described in the prior art. It addresses and meets needs. This invention is used in the aviation industry, specifically in the windshields of helicopters. Especially in civilian and military helicopters, it improves pilot visibility and protects against external factors. to ensure durability and prevent icing / condensation It has been designed. This invention addresses the shortcomings of existing solutions, creating a more advanced system. It offers. The biggest difference is that it adds a hard-coated polycarbonate (PC) behind the glass, making it 15 The aim is to both improve optical performance and increase scratch resistance. This ensures pilot visibility does not decrease over time, providing a long-lasting and highly durable solution. This is achieved. In addition, a more homogeneous heat distribution is ensured thanks to the three-phase heating system. The use of tempered glass and hard-coated polycarbonate provides resistance to both scratches and impacts. Superior resistance is provided. 20 The fundamental difference between this invention and the products mentioned in the prior art is that... It is produced by laminating heated glass with rigid-coated polycarbonate (PC). This allows... Increased scratch resistance, improved optical performance, and long-lasting. A solution has been provided that meets the pilots' demands in use. Hard-coated PC 25 its use, especially regarding scratch-induced optical degradation experienced by PET film-based solutions. By eliminating these obstacles, it offers a longer-lasting and more reliable structure. Furthermore, this structure... By increasing impact resistance, it provides a safer solution for both civilian and military use. It offers. In summary, the invention involves laminating PC onto the inner surface of glass, and this PC surface is resistant to scratches. to prevent optically damaging the laminated glass in the visible region A hard coating has been applied that does not reduce light transmission by even 1%. 3 REFERENCE LIST 1 Tempered glass 2 ITO (Indium Tin Oxide) coating 3 Connection materials 5 4 Polycarbonate plates Hard coating 6 Current conductors BRIEF DESCRIPTION OF THE DRAWINGS 10 Figure 1: Light transmittance of uncoated product where the invention is not applied after wear. decline graph Figure 2: Graph of light transmittance decrease of coated product after abrasion. Figure 3: Side-by-side layer representation of the invention in question. 15 Figure 4: Representative view of the invention applied to a silver bar (6). EXPLANATION OF THE INVENTION To describe this invention, without limiting its impact, we include the following 20 elements: The explanation has been provided; Tempered Glass (1): Used on the exterior surface of the building. High mechanical strength. Thanks to this, it is resistant to impacts such as bird strikes. In the first stage, the surface It gains a heating function thanks to the applied ITO (Indium Tin Oxide) coating (2). 25 ITO (Indium Tin Oxide) coating (2): Applied to the tempered glass (1) surface It is a conductive layer. It allows the glass to be heated by applying electricity. Bonding Material (3) (Thermoplastic Polyurethane (TPU)): 30 during lamination process bonding the layers of tempered glass (1) and polycarbonate plate (4) It is an adhesive, flexible material. 4 Transparent polycarbonate plate (4): It is the inner surface facing the pilot. High impact resistance. Thanks to this, it resists external influences such as bird strikes. With a hard coating (5) It is coated to protect against scratches. Hard Coating (5): Applied to the surface of polycarbonate plate (4), scratch resistance 5 It is a protective layer that enhances [the effect]. Current Conductor (6): To conduct electric current to the ITO (Indium Tin Oxide) coating (2) It is used for. Tempered glass (1) is usually placed on the edges and heating It enables the system to function. It is a silver bar. 10 This invention features an electrically heated material with high optical transparency and mechanical strength. It is a laminated glass structure. The product is made of high-transparency tempered glass (1). polycarbonate plate with scratch-resistant hard coating (4), thermoplastic 15 by laminating with an interlayer (3) which is a polyurethane (TPU) bonding material. It has been created. Step 1. High Transparency Tempered Glass (1) Layer: The exterior surface of the structure It forms and is the main load-bearing element. Tempering process protects against damage such as bird strikes. Its mechanical resistance to impacts has been increased. 20 Step 2: Application of ITO (Indium Tin Oxide) Coating (2): Tempered glass (1) on the inner surface, by physical vapor deposition (PVD) method (sputter system) It is applied. It functions as electrical heating. A suitable area according to resistance calculations. The desired heating profile is achieved by coating. Step 3. Application of Current Conductor (6): ITO (Indium Tin Oxide) coated 25 (2) is applied to the edges of the area. The electric current is applied to ITO (Indium Tin Oxide) It transmits heat to the coating (2) surface and ensures homogeneous heat distribution on the surface. Step 4: Applying Hard Coating (5) to the surface of the polycarbonate plate (4): It forms the inner surface of the structure; it is the side facing the helicopter cockpit. High impact. Thanks to its durability, it is resistant to external influences. Hard coating (5) optical 30 It provides high resistance to scratches without affecting performance. Step 5 Lamination. The bonding material (3), which is the TPU interlayer, is tempered. It is placed between glass (1) and polycarbonate plate (4). During the lamination process TPU is the bonding material (3) which acts as an interlayer, two surfaces (tempered It forms a strong bond between glass (1) and polycarbonate plate (4). The installation of this structure ensures both the functionality of the heating system and mechanical protection. It provides both strength and optical transparency. 5 on the surface of polycarbonate plate (4) Thanks to the hard coating (5) applied with high optical quality, the surface use It becomes resistant to scratches throughout its lifespan. At the same time, the optical properties of the glass... Clarity and light transmission are preserved. Detailed production stages of the invention; The invention features a scratch-resistant inner surface, developed for helicopter applications. hard coated (5) polycarbonate plate (4), on its outer surface is ITO (Indium Tin 15 with tempered glass (1) coated with (2) oxide) and integrated heating function. It consists of a transparent structure. TPU (thermoplastic polyurethane) is between the layers. Lamination is done by autoclave method using bonding material (3).  Tempered Glass (1); cut to appropriate dimensions, edges made smooth and curved It is brought. The outer surface of the tempered glass (1) is brought to the outside of the helicopter, and the inner surface is brought to the outside of the helicopter. It will be positioned to come into contact with the polycarbonate plate (4).  ITO (Indium Tin Oxide) coating (2) on the tempered glass (1) surface homogeneous, transparent, and with the desired resistance value in the product. It is applied using the magnetron sputtering method. 25  Silver paste on both edges of the ITO (Indium Tin Oxide) coating (2) It is applied in a linear fashion. This paste has ITO (Indium Tin Oxide) coating. (2) conductive connection to distribute the electric current evenly on its surface It provides. 30  The polycarbonate plate (4) is cut and its edges are sanded. Polycarbonate plate surface (4), free from dust, oil and other contaminants before coating 6 It is purified. Surface cleaning is performed using ionized air and alcohol with pure water cleaner. It is used as follows: PC 100C0, approximately 5 hours of dehumidification in the oven. It is done. The hard coating (5) application step is started on the surface. Thermal The curable hard coating (5) liquid is brought to the appropriate viscosity. Hard coating (5) liquid is applied continuously and controllably to the top of the polycarbonate plate (4) surface. It flows in some way. The liquid flows downwards along the surface due to the effect of gravity. and covers the entire surface homogeneously. Excess liquid flows away from the edges. It leaves a thin, smooth, hard coating (5) layer on the surface. Coated The part is placed in a thermal oven to allow it to harden. During curing... The solvents evaporate and the coating hardens, resulting in a scratch-resistant surface. It is done.  Tempered glass (1) plate (any traces on the surface of the bag polycarbonate polycarbonate plate in order to prevent it from coming out of the autoclave on the surface of plate (4) (4) (hard coated (5)) + connecting material (3) + ITO (Indium Tin 15 (2) tempered glass (1) coated with oxide) is placed in an autoclave in a vacuum bag. and laminated. Bubble-free, homogeneous adhesion is achieved in the autoclave. The most notable details of the invention are: 20 Polycarbonate plate (4) should be cleaned of dust, oil and other contaminants before coating. It is purified. Ionized air and solvent-based cleaners are used for surface cleaning. Polycarbonate plate (4) is baked at 100 °C for about 5 hours. It is freed from moisture. Then, the thermally curable hard coating (5) liquid is applied to a suitable 25 It is brought to the desired viscosity and applied continuously to the surface using the flow coating method. It is applied in a controlled manner. The liquid flows over the surface under the influence of gravity. It forms a homogeneous film. Excess liquid drains away from the edges and remains on the surface. A thin, smooth hard coating (5) layer remains. The coated polycarbonate plate (4), Cured in a thermal oven, it has high scratch resistance and optical transparency of 30. A protective surface is obtained. Before proceeding to the lamination stage, hard coated (5) polycarbonate plates (4) An additional measure is taken to protect the surface. Lamination process 7 in an autoclave environment under high pressure of approximately 10 bar Since this is done, the surface texture or possible defects of the vacuum bag are rigid. Coated (5) polycarbonate plate (4) carries the risk of leaving a mark on the surface. This risk To prevent this, a temporary hard coated (5) polycarbonate plate (4) surface is placed on top of the surface. A flat glass base with a minimum thickness of 3 mm is installed. This support glass is 5 by distributing the applied pressure evenly across the surface, the vacuum bag marks It prevents transfer and preserves the optical integrity of the hard coating (5) surface. Once lamination is complete, this protective glass layer is removed from the system. This ensures the product is long-lasting, scratch-resistant, and has high optical quality. is guaranteed. 10

Claims

8 REQUESTS 1. This invention describes laminated heated plates containing hard coated (5) polycarbonate plates (4). It is a helicopter window, and its feature is; 5  Used on the exterior surface of the structure, with high mechanical resistance and impact resistance. resistant, ITO (Indium Tin Oxide) applied to the surface in the first stage tempered glass (1) gains heating function thanks to coating (2),  an electric conductive layer applied to the surface of tempered glass (1) ITO (Indium Tin) is responsible for heating the glass by applying heat. Oxide) coating (2),  During the lamination process, tempered glass (1) and polycarbonate plate (4) 15 Adhesive, flexible bonding material (3) that binds the layers together.  with a hard coating (5) that forms the inner surface, with high impact resistance polycarbonate plate (4) which is coated to protect against scratches.  Protective coating applied to the surface of polycarbonate plate (4) which increases scratch resistance hard coating which is a layer (5),  To transmit electric current to the ITO (Indium Tin Oxide) coating (2) The current responsible for ensuring the operation of the heating system being used is 25. conductor (6) It consists of layers. It includes.

2. Laminated containing hard coated (5) polycarbonate plate (4) mentioned in Claim 1. It is a heated helicopter screen, and its feature is that it is made of thermoplastic polyurethane. It is to include the connecting material (3). 9 3. Laminated containing hard coated (5) polycarbonate plate (4) mentioned in Claim 1. It is a heated helicopter screen, and its feature is; 4. Laminated 5 containing hard coated (5) polycarbonate plate (4) mentioned in Claim 1. It is a heated helicopter window, and its feature is tempered glass (1) on the edges. It contains a current conductor (6) which is a silver bar that can be placed.

5. This invention describes laminated heated plates containing hard coated (5) polycarbonate plates (4). It is a helicopter window production and its feature is; high transmittance tempered glass (1) and 10 polycarbonate plate with scratch-resistant hard coating (4), laminated with an interlayer (3) which is a thermoplastic polyurethane (TPU) bonding material. It includes the processes involved.

6. Laminated 15 containing hard coated (5) polycarbonate plate (4) mentioned in Claim 5. It is a heated helicopter windshield, characterized by its scratch-resistant inner surface. hard coated (5) polycarbonate plate (4), on its outer surface is ITO (Indium Tin (2) tempered glass (1) with (oxide) coating, integrated heating function The structure consists of a transparent layer with TPU between the layers. Autoclave 20 using (thermoplastic polyurethane) bonding material (3). This involves the lamination process using this method.

7. Laminated containing hard coated (5) polycarbonate plate (4) mentioned in Claim 5. It is a product manufactured from heated helicopter windows, and its characteristic feature is;  tempered glass (1) cut to appropriate dimensions, edges smooth and curved to make it, the outer surface of tempered glass (1) is outside the helicopter, the inner surface positioned in such a way that it will come into contact with the polycarbonate plate (4),  ITO (Indium Tin Oxide) coating (2) on tempered glass (1) surface 30 homogeneous, transparent, and with the desired resistance value in the product. Application by magnetron sputtering method,  Silver paste on both edges of the ITO (Indium Tin Oxide) coating (2) application in the form of a line, 35  Cutting the polycarbonate plate (4), sanding the edges, polycarbonate plate surface (4) free from dust, oil and other contaminants before coating purification, surface cleaning with ionized air and alcohol, pure water cleaner Used as, polycarbonate plate (4) at 100C0 for approximately 5 hours 5 dehumidification process in the oven, hard coating (5) application to the surface The transition to the next step involves the appropriate thermally curable hard coating (5) liquid. to bring to viscosity, hard coating (5) liquid, polycarbonate plate (4) by continuously and controllably pouring the liquid onto the upper part of the surface flowing downwards on the surface due to gravity and covering the entire surface 10 After evenly coating, excess liquid flows off the edges and remains on the surface. The part coated by leaving a thin, smooth hard coating (5) layer, to ensure hardening, it is placed in a thermal oven, during curing The solvents evaporate and the coating hardens, making it scratch-resistant. surface acquisition, 15  tempered glass (1) plate (any marks on the surface of the bag In order to prevent the polycarbonate plate (4) surface from coming out in the autoclave, polycarbonate plate (4) (hard coated (5)) + connecting material (3) + ITO (2) tempered glass (1) vacuum bag with (Indium Tin Oxide) coating 20 autoclaving and lamination It consists of process steps.

8. Laminated 25 containing hard coated (5) polycarbonate plate (4) mentioned in Claim 5. It is a product manufactured from heated helicopter windows, and its characteristic feature is;  Before proceeding to the lamination stage, hard coated (5) polycarbonate A flat surface with a minimum thickness of 3 mm is temporarily placed on the surface of the plate (4). After the glass placement and lamination are complete, this protective glass will last 30 days. The process involves removing the layer from the system.

Images