BORON CARBIDE REINFORCED POLYURETHANE COATED MILITARY TENT FABRIC

Abstract

The invention relates to a single-layer polyurethane composite coating reinforced with boron carbide particles, applied to the surface of polyester or nylon-based tent fabrics used in military field shelters to increase their resistance to abrasion, water, and wind.

Description

BORON CARBIDE REINFORCED POLYURETHANE COATED MILITARY TENT FABRIC TECHNICAL FIELD The invention is a polyester or nylon-based tent used in military field shelters. to increase the resistance of fabrics to abrasion, water and wind effects a single-layer reinforced with boron carbide particles applied to the fabric surface It is related to polyurethane composite coating. PREVIOUS TECHNIQUE Tents and camp shelters used in military field conditions are designed for extended periods. Throughout, they are exposed to varying climatic conditions, intense sunlight, humidity, wind, and wind. They are exposed to abrasive particles carried by the air. Therefore, military tent fabrics... It is not enough for it to be simply lightweight and foldable; it also needs to be mechanical and It must have a surface structure that protects against environmental effects. Current military tent tarpaulins are mostly made of high-strength polyester or It is produced from fabrics woven from nylon threads. Traditionally, it is made from cotton. Although canvas fabrics were used in the past, nowadays lighter and more water-resistant fabrics are available. Durable synthetic fabrics such as nylon and polyester are preferred. One or both surfaces of the fabrics are usually coated with PVC, silicone or acrylic-based materials. They are coated. Nylon tent fabrics are also coated with acrylic or silicone-based coatings. This can be supported. In the literature and current practices, PVC and acrylic are the most common. It is among the coating polymers used. There are different methods for applying polymer coating to fabric surfaces. It is used in knife coating methods. In knife coating, a polymer solution is applied to the fabric. It is applied, spread onto the surface with the help of a micrometer-adjustable blade, and the excess coating is removed. The coating cures after the material is removed. This method is used for coating. It allows for controlled adjustment of its thickness. In the hot melt extrusion method, thermoplastic granules are produced at high temperatures. It is melted and transferred from the roller to the fabric. Drying or curing stage Not needing to be used increases production speed. In the transfer coating method, however... The polymer material is first layered on a paper substrate in the form of a primer, intermediate layer, and top layer. It is applied in this form, baked, and then transferred onto the fabric by pressing. This method enables the creation of multi-layer coatings, however, the process structure... 1 It is more complex. In addition to these, there are film lamination, dip coating, pad-dry-cure, Methods such as heated lamination and adhesive lamination are also used to laminate textile surfaces. It is used for coating or strengthening purposes. However, in existing military tent fabrics and their surfaces Traditional coatings used in this way present various durability problems. Especially in dusty and rocky desert environments, sand, soil, and small stones are carried by the wind. The particles create a continuous abrasive effect on the fabric surface. This effect, the coating thins over time, surface integrity deteriorates and the tent This shortens the lifespan of the fabric. Prolonged exposure to ultraviolet radiation also negatively affects the coating structure. It has an effect. In polymer-based coatings, the polymer is affected by the effect of ultraviolet rays. The ligaments in the spine can break and photo-oxidative degradation can occur. This degradation can result in discoloration, blistering, and peeling of the surface. Cracks and pores may form, leading to a decrease in tear resistance. Uncoated. Nylon or polyester fabrics also become brittle over time when exposed to intense sunlight. and can easily become damaged or torn. Polymer coatings used in humid or tropical environments deteriorate over time. It can undergo hydrolysis, resulting in softness and loss of mechanical strength. This is possible. Unreinforced polymer films can be used on hard or rough surfaces. They are easily scratched and punctured when they come into contact with the eye. Even imperceptible surface damage can impair the waterproofing properties of the coating. It can weaken the body. If the coating layer loses its integrity, at the seam areas, Water can seep through microcracks or surface defects. Therefore... In current applications, outer coverings are films used to seal the gaps between the fibers. It is treated with chemicals that form the coating. However, over time, the coating surface... The resulting microcracks are unable to prevent water from penetrating the fabric. Traditional coated fabrics are a complete air barrier in all cases. It is unable to provide this. Air passage through the fabric or coating prevents cold. This prevents cold air from entering the tent in certain weather conditions, and conversely, it prevents air from entering the tent in hot weather conditions. This can cause the ambient temperature to rise. Insufficient insulation can affect the temperature inside the tent. It also reduces the efficiency of heating and cooling systems. Silicone coatings offer an advantage in terms of chemical resistance. Therefore, thermoplastic adhesives have difficulty adhering to these surfaces. For this reason, silicone... 2 Repairing tears or holes in coated tent fabrics using tape. It is becoming more difficult. A significant portion of current coating systems provide water and wind resistance to the fabric. It focuses on providing a good coating, but the coating surface contains sand, soil, and stone particles. and protection against corrosive effects resulting from frequent installation and removal operations It does not contain a high-stiffness reinforcement structure. This situation is particularly problematic for heavy field use. protective properties and service of military tent fabrics used in these conditions It limits its lifespan. THE PURPOSE OF THE INVENTION The primary purpose of the invention is to protect uncoated surfaces used in military field shelters. Boron carbide-reinforced polyurethane applied to the surface of polyester or nylon tent fabrics. The goal is to increase the abrasion resistance of the fabric by applying a composite coating. Another objective of the invention is to distribute homogeneously within a polyurethane matrix. Micro-armor effect on the fabric surface with the help of high-hardness boron carbide particles. a coating structure that creates a flexible structure but preserves the fabric's ability to bend and twist. to create. The invention involves filling the pores on the fabric surface with a continuous layer of polyurethane film. by sealing it, we can also improve the waterproof and windproof properties of the fabric. The aim is to achieve this through the distribution of boron carbide particles within the coating. Thanks to the resulting winding path effect, a barrier is created against the passage of water and air. The aim is to strengthen it. One of the aims of the invention is to reduce the hardness of high-hardness boron carbide particles. By taking advantage of its density property, the surface durability of the fabric is greatly improved. The goal is to raise the weight without creating an additional burden. In addition, polyurethane offers flexibility, film-forming ability, water repellency, and Adapting to folding and stretching movements by utilizing its adhesion properties to textile fibers. providing, remaining on the fabric surface without cracking, and withstanding harsh field conditions. The aim is to obtain a coating that does not detach from the fabric. The invention also enables the application of the coating in a controlled and uniform thickness, preventing unnecessary weight increase and ensuring sufficient weight distribution in every area of ​​the fabric surface. The aim is to provide protection. Thus, the tent fabric must withstand challenging terrain and climate conditions. extending service life under these conditions, reducing maintenance needs, and military The aim is to create a more reliable shelter material for personnel. 3 DETAILED DESCRIPTION OF THE INVENTION The invention is intended for use in military tents and field shelters. developed, polyester or nylon based, bearing a boron carbide reinforced polyurethane coating It is a technical textile structure. The coating is applied to polyester that has not been previously coated or It is applied as a single layer to the surface of nylon woven tent fabric. The matrix of the composite coating is made of polyurethane. Polyurethane provides flexibility, Due to its film-forming ability and water-repellent properties, it is used as a fabric coating material. It is used. When applied to the fabric surface, it affects the woven structure. It forms a continuous and adhesive film layer that fills the pores. This film layer restricts the passage of water through the fabric and resists air movement. It forms a barrier. When polyurethane coating is applied with the appropriate formulation and thickness, the tent The fabric has a hydrostatic water pressure resistance of over 10,000 mm water column. It can provide this. The elastic nature of polyurethane allows the coating to fold the fabric, This allows the coating to adapt to stretching and tension movements. Thus, the coating... Despite the fabric constantly changing shape during use, it adheres to the surface. And it can move along with the fabric without cracking. The adhesion that polyurethane forms with textile fibers allows the coating layer to withstand challenging external conditions. This prevents the coating from separating from the fabric surface under ambient conditions. creating a continuous layer on the fabric, within the weave closing microscopic gaps and making the fabric more resistant to wind penetration. It enables it to reach that state. The polyurethane matrix is ​​reinforced with boron carbide particles. Boron carbide, It is one of the hardest materials after diamond and cubic boron nitride, and has high wear resistance. It is a ceramic material with high resistance. These high-hardness particles are polyurethane. By being dispersed within the matrix, it provides a protective layer against abrasive effects on the coating surface. It creates a structure. Boron carbide particles reduce the effects of friction and wear on the polyurethane film. It directly limits its concentration and acts as a micro-armor within the coating. This structure allows the tent fabric to absorb sand, soil, and small particles carried by the wind. surface abrasives from stone particles and frequent setting up and taking down of the tent It is becoming more resistant to the effects. Boron carbide has a low density of approximately 2.5 g / cm³, resulting in high hardness. Despite the use of a ceramic reinforcement, the coating has a significant impact on the fabric. 4 This allows for the fabric to maintain its surface durability without adding weight. while increasing the portability and flexibility expected from military tent fabric. Its features are preserved. The amount of boron carbide to be added to polyurethane can be up to fifty percent by weight. It is possible. The grain size of the boron carbide particles to be used is 30 micrometers. This is the extent of the problem. The aim is to distribute the particles homogeneously within the polyurethane. The ultrasonic dispersion method is used. Ultrasonic dispersion of boron carbide particles within a polyurethane matrix. limiting the accumulation of composite coatings in specific areas and different This ensures a more balanced particle distribution in the sections. Homogeneous distribution means that wear resistance on the coating surface is not limited to specific areas. important in terms of not remaining and being protected throughout the entire coating layer. It carries. Boron carbide particles allow water and air to pass directly through the coating. It forms a structure that lengthens the paths the particles can travel. Polyurethane matrix This circuitous path effect, created by the distribution within it, is due to the polyurethane film. It supports the water and wind barrier it creates. The prepared mixture of polyurethane and boron carbide can be applied to uncoated polyester or It is applied to nylon tent fabric using a knife coating method. In this method... The composite coating solution is applied to the fabric surface and a blade scraper It spreads across the surface with the help of the blade. By controlling the position and opening of the blade. The thickness of the coating on the fabric is adjusted. The blade coating method involves coating the fabric with a mixture containing polyurethane and boron carbide. It ensures that the coating is transferred to the surface smoothly and continuously. Excess coating The removal of the material results in a uniform thickness and smooth coating on the fabric. a layer is formed. Controlling the coating thickness avoids unnecessary... While preventing material and weight increase, it provides protection at every point on the fabric surface. It allows the layer to be located. The coating is applied directly to the fabric surface, using a polyurethane matrix with textiles. This contributes to the formation of a strong interfacial bond between the fibers. Thus, a single layered composite coating, folding and creasing that occurs during the use of the fabric. It can adapt to stretching movements and remain on the fabric without detaching from the surface. It can remain. The resulting coating structure incorporates a polyurethane matrix, exhibiting flexibility, film integrity, and water resistance. It provides repellency and adhesion properties to the textile surface. Boron carbide particles, on the other hand... Thanks to their high hardness, the coating resists friction, scratches, and abrasive particles. It increases resistance to the effects. The two components are combined in the same coating. by using it, it both maintains its flexibility and resists surface wear. A reinforced tent fabric is obtained. The composite coating fills the gaps in the woven fabric, preventing rain. It creates a hydrophobic surface that prevents water from penetrating the fabric. This is why water reaching the fabric surface beades up through the coating layer. It is moving away. The coating closes the microscopic gaps within the fabric. It also reduces air permeability and enhances the windproof properties of the fabric. It is developing. Restricting wind passage allows outside air to pass through during cold weather conditions. This reduces the likelihood of infiltration into the tent. This situation allows personnel inside the tent to... It contributes to the preservation and maintenance of indoor comfort. The fabric creating a stronger barrier against air leakage, heating inside the tent, and It also helps maintain the efficiency of cooling systems. Boron carbide reinforcement makes the coating resistant to sand, soil, small stone particles and rough surfaces. surface integrity against abrasive effects resulting from contact with surfaces This provides protection. This prevents scratches, thinning, microcracks, or other damage to the coating. The likelihood of punctures is reduced, and the water and wind barrier properties of the coating are improved. It is preserved for a long time. The coating retains its integrity for a longer period of time against environmental and mechanical effects. This protection extends the service life of the tent fabric. It prevents damage that may occur on the surface. Limiting damage also reduces the need for fabric maintenance and repair. Therefore, tent materials are used intensively in the field, and frequent setup and dismantling operations are required. During this time, it can maintain its protective properties for a longer period. In conclusion, single-layer boron carbide reinforced polyurethane coating, uncoated Polyester or nylon tent fabric offers abrasion resistance, waterproofing, and windproof properties. It provides special features. The flexible nature of the coating allows the fabric to be folded. While protecting, the protective structure formed by boron carbide particles makes the tent fabric abrasive. This structure strengthens them against field conditions. This structure enables military personnel to cope with challenging terrain and climate. and a maintenance-free protective barrier that can be used in outdoor conditions. This results in a tent fabric with improved functionality. 6

Claims

1. For application to polyester or nylon-based textile surfaces. It is a structured composite coating material, characterized by its flexibility and film-like properties. a polyurethane matrix that can form, is water-repellent and adheres to textile fibers. The issue is the friction, scratching, and coating surface within a polyurethane matrix. a protective structure that increases resistance to abrasive particle effects and with water a circuitous path that lengthens the path of air's movement through the coating homogeneously distributed, particle size 30 for the purpose of forming up to a micrometer in size and containing fifty percent by weight of polyurethane. It is characterized by containing boron carbide particles of a certain size.

2. Designed for use in military tents and field shelters. It is a tent material, characterized by having a single layer on the surface of the tent fabric. applied, polyurethane matrix and homogeneously formed within this matrix by including a composite coating containing dispersed boron carbide particles It is characteristic. 7