Aramid fabric, also known as Kevrab, aramid fabric, or aramid fabric, is a high-performance fiber fabric made from aramid fibers. Aramid fiber, the full name of alicyclic acrylic resin fiber, refers to more than 85% of the amide bond directly connected to the benzene ring on the long chain synthetic fiber, this unique chemical structure gives aramid fabric a series of excellent properties.
Aramid fabric has very high strength and toughness, its breaking strength is much higher than ordinary polyester, cotton, nylon and other fibers, and has good elongation and soft feel. In addition, aramid cloth also has excellent flame retardant and heat resistance, limiting oxygen index (LOI) is greater than 28, even under high temperature conditions can maintain a high strength, and will not melt, melt drop, showing good thermal stability. These characteristics make the aramid fabric can still maintain good performance in extreme environments.
In terms of chemical stability, aramid fabrics show tolerance to most chemicals, including high concentrations of inorganic acids, and excellent alkali resistance at room temperature. At the same time, the aramid fabric also has good radiation resistance, which can keep its strength unchanged in a strong radiation environment.
In summary, aramid fabric is a high-performance fiber fabric with excellent properties such as high strength, high toughness, flame retardant, heat resistance, chemical corrosion resistance and radiation resistance. These characteristics make aramid fabric have a wide range of application prospects in many fields, such as industry, military, fire, aerospace and so on.
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In terms of substrate, its durability is directly affected by fiber quality, fabric structure and pre-treatment process. High quality aramid fiber is the basis of durable coated fabrics, and its excellent breaking strength, modulus and temperature resistance provide strong support for fabrics. At the same time, reasonable fabric structure design, including warp and weft density, yarn twist and fabric organization optimization, can effectively disperse external forces, reduce stress concentration, thereby improving the fabric tear and wear resistance. In addition, proper pre-treatment of the aryl fabric, such as cleaning, oiling and drying, can remove surface impurities, enhance the adhesion of the coating and the substrate, and lay a solid foundation for the durability of the coated fabric.
The coatingIn terms of coating, the selection of coating material, coating thickness, coating process and post-treatment process are all important factors that affect the durability of coated fabrics. High-quality coating materials should have good weather resistance, wear resistance, chemical corrosion resistance and good adhesion with the substrate to ensure that the coated fabric can still maintain stable performance in harsh environments. At the same time, reasonable control of coating thickness to avoid performance problems caused by too thin or too thick is also the key to improve the durability of coated fabrics. Advanced coating technology and strict process control ensure that the coating is uniform, dense and tightly integrated with the substrate. Appropriate post-treatment processes, such as heat treatment and curing treatment, can further improve the stability and durability of the coating, so that the coated fabric can maintain excellent performance in long-term use.
Yes, Kevlar® is indeed made from aramid. Whenever we mention aromatic polyamide fabrics, we must mention Kevlar® because Kevlar® is the brand name of an aromatic polyamide fiber pioneered by DuPont in the 1960s. The brand has established itself as the exclusive name of this particular material by virtue of its superior performance and wide range of applications, which to some extent reflects the extreme power of the brand – when the brand name becomes so ingrained that it eventually becomes almost synonymous with the item.
Specifically, Kevlar® is a special type of aramid fiber made from a high-performance polymer called polyp-phenyl-p-phenylenediamine (PPTA). The polymer is carefully spun and made into slender fibers that can then be woven or knitted into a variety of fabrics. Due to their unique physical properties, these fabrics are used in a wide range of applications, including but not limited to the manufacture of body armor, protective helmets, and for strengthening tires, significantly enhancing the safety and durability of these products.
Kevlar® stands out among the many high performance materials mainly due to its high tensile strength, excellent wear and impact resistance, and excellent resistance to high temperatures. These characteristics make Kevlar® the ideal choice for a wide range of applications that need to withstand extreme conditions, further consolidating its leading position in the field of aromatic polyamide fabrics.
Aramid coated fabrics are crafted from a synthetic fiber called aramid, whose core advantage lies in its unique chemical structure. This structure gives the aramid fiber its outstanding strength and durability, making it ideal for many high-performance applications.
The chemical structure of aramid fiber is characterized by its long chain molecules are closely connected by strong hydrogen bonds. These strong hydrogen bonds not only provide the fiber with excellent tensile strength, but also significantly enhance its wear resistance. When subjected to external forces, these strong bonds can effectively disperse and withstand stress, thereby protecting the fiber structure from being destroyed.
In addition, the hydrogen bond in the aramid fiber also makes it have a strong thermal degradation. This means that in high temperature environments, aramid fibers can maintain their structural stability and performance, and will not easily decompose or deteriorate due to heat. This feature allows aramid coated fabrics to be used at high temperatures for long periods of time without fear of performance degradation.
When looking for a very durable material, it is crucial to know the specifications of the substrate and coating. The aramid coated fabric combines the substrate with the coating perfectly through reasonable weaving density and advanced coating technology, thus providing excellent mechanical properties, thermal insulation properties and wear resistance. At the same time, the material can also be made light and easy to carry and use. Therefore, aramid coated fabrics have shown a wide range of application prospects in many fields, such as military, aerospace, industrial protection and so on.
When choosing the right aramid fabric for your industry, you need to consider a number of factors to ensure that the selected material can meet the needs of the specific industry. Here are some key points to choose from:
Understand the industry needs: First of all, to clarify the specific application needs of aramid fabric in your industry. For example, in the aerospace sector, aramid fabrics may be required to have extremely high strength and high temperature resistance; In the field of protective equipment, more attention may be paid to its flame retardant, cutting resistance and impact resistance.
Aramid 1313 (intermediate aramid) : This aramid fiber has excellent flame retardant, heat resistance and good textile processability, and is usually used to make high temperature protective clothing, fire protection clothing and so on. Its high temperature resistance, no melting, no gas characteristics, so that it is widely used in metallurgy, construction, shipbuilding and other industries that need high temperature protection.
Aramid 1414 (para aramid) : also known as Aramid II, it has extremely high strength and modulus, as well as good wear resistance, impact resistance and fatigue resistance. It is often used to make protective equipment such as body armor and bulletproof helmets, as well as structural components of aircraft, cars and other vehicles to improve safety and durability.
Strength and modulus: According to the requirements of industry applications for strength and modulus, choose the appropriate aramid fabric. For example, in cases where high impact or high tensile forces are required, aramid fabrics with higher strength and modulus should be selected.
Heat resistance: Considering the working environment temperature, choose aramid cloth with sufficient heat resistance. Industries that work in high temperature environments, such as metallurgy, chemical industry, etc., should pay special attention to this point.
Wear resistance: Wear resistance is an important consideration in situations where frequent friction or wear is required. For example, in the field of tire skeleton, brake pads, etc., the wear resistance directly affects the service life of the product.
Corrosion resistance: According to the type and concentration of chemical substances in the working environment, choose aramid cloth with sufficient corrosion resistance. For example, in the chemical, petroleum and other industries, aramid cloth is needed to resist the erosion of chemical substances such as acids and alkalis.
Textile processability: Consider the textile processing performance of aramid fabric, including spinnability, weaving difficulty, etc. Good textile processing performance helps to reduce production costs and improve production efficiency.
Coating and composite processability: If the aramid fabric needs to be coated or composite treatment to improve its performance, aramid fabric varieties that are easy to process should be selected.
Price factor: under the premise of meeting the performance requirements, consider the price factor of aramid fabric. Different varieties, different specifications of aramid cloth prices vary greatly, should be selected according to the budget and actual needs.
Service life: Considering the service life and maintenance cost of aramid fabric, choose cost-effective products.
To sum up, the choice of aramid fabric suitable for their own industry needs to consider industry application needs, aramid fiber type, physical performance requirements, chemical stability, processing performance and cost effectiveness and other factors. It is recommended to fully understand the industry standards and specifications, as well as the performance indicators and application cases of aramid fabric products before choosing, in order to make a more informed decision.
Industry | Application Scenario | Suitable Aramid Fabric Type | Main Required Characteristics |
Aerospace | Aircraft seats, space suits, parachute harnesses, etc. | Aramid 1414 (Para-aramid) | High strength, high modulus, high temperature resistance, fatigue resistance |
Military | Bulletproof clothing, stab-resistant clothing, helmets, etc. | Aramid 1414 (Para-aramid) | High strength, high modulus, excellent bulletproof performance, cut resistance, impact resistance |
Fire Protection | Fire barriers, fire-resistant curtains, etc. | Aramid 1313 (Meta-aramid) | Excellent flame retardancy, high temperature resistance, non-melting, non-toxic gas emission |
Industrial | High-temperature filter materials, valve coverings, sealing gaskets, etc. | Aramid 1313 (Meta-aramid) | High temperature resistance, corrosion resistance, good textile processability |
Textile | High-end protective clothing, sports equipment, etc. | Based on specific needs | Good mechanical properties, abrasion resistance, chemical resistance, comfort |
Petrochemical | Corrosion-resistant piping, tank linings, etc. | Aramid 1313 (Meta-aramid) | Resistant to most high-concentration inorganic acids, alkali resistance, excellent chemical stability |
Electronics | High-performance wire and cable insulation, electromagnetic shielding materials, etc. | Aramid 1414 (Para-aramid) | High strength, low dielectric constant, good insulation performance |
Marine | High-performance ropes, sails, etc. | Based on specific needs | High strength, abrasion resistance, seawater corrosion resistance, lightweight |
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