Engineering Plastic - Good Chemical Resistance Polyamide

Polyamide (PA), commonly known as nylon, is a multifunctional engineering plastic with a wide range of applications. From textiles to automotive parts, from electronic devices to bulletproof materials, polyamide plays an important role in modern life.

Polyamide (PA) is a polymer formed by the polymerization of monomers containing carboxyl and amino groups through amide bonds. This polymer can be naturally generated (such as various natural proteins such as wool and silk), or produced artificially through stepwise polymerization or solid-phase polymerization (such as nylon) or aromatic polyamide and sodium polymerization (such as aspartic acid). Due to its extreme durability and strength, artificial polyamide polymers are commonly used in the production of textiles, carpets, sportswear, food packaging, eyewear parts, automotive and aircraft parts tires, military products, and protective equipment.

The properties of polyamide

1. Heat resistance: The glass transition temperature of polyamide is usually between 280 ° C and 290 ° C, and can be used in the temperature range of -200 ° C to 260 ° C.
2. Corrosion resistance: It has good stability to radiation and ultraviolet rays, and excellent radiation resistance.
3. Mechanical performance: It has excellent tensile strength and fatigue resistance.
4. Dimensional stability: With a small coefficient of linear expansion, the size variation is small and the moisture absorption is low.

Classification of polyamides

Here are some commonly used polyamide varieties:
1. Nylon 6 (PA6): Made of ε- Made of caprolactam, it has good strength, wear resistance, and oil resistance. Commonly used for manufacturing durable parts such as gears, bearings, textiles, etc.
2. Nylon 66 (PA66): Made of caprolactam and adipic acid, it has high thermal stability and wear resistance. Widely used in automotive parts, electronic equipment, and engineering components.
3. Nylon 11 (PA11): With outstanding low-temperature toughness, it is suitable for making cold resistant and wear-resistant parts.
4. Nylon 12 (PA12): It also has good low-temperature performance and is commonly used in the manufacturing of pipelines, cable sheaths, etc.
5. Nylon 610 (PA610): It has excellent heat resistance and is suitable for applications in high-temperature environments.
6. Nylon 1010 (PA1010): Produced from castor oil, it is a unique variety in China.

Polyamide (also known as nylon, English name Polyamide, PA) is a multifunctional engineering plastic widely used in fields such as automobiles, electronics, machinery, textiles, and daily necessities. However, polyamide has a low oxygen index and is prone to combustion, which may cause fires. Therefore, in order to improve the flame retardant performance of polyamide, the following flame retardant methods are often used:

1. Additive flame retardants:
Additive flame retardants are currently the main method for flame retardancy of polyamides.
Common additive flame retardants include:
Decabromodiphenylethane: It has a high flame retardant efficiency, but has a certain negative impact on processing fluidity and physical and mechanical properties.
Ammonium polyphosphate (APP): Improves flame retardant performance by reducing the degradation temperature of polyamide and forming a carbonized covering layer.
Nitrogen based flame retardants, such as melamine cyanurate, have the characteristics of low toxicity, non corrosion, and good flame retardant efficiency.
2. Reactive flame retardants:
Reactive flame retardants involve flame retardants as reactive monomers and bind to the main or side chains of polyamide, resulting in the polyamide itself containing flame retardant components.
This method has good stability, low toxicity, minimal impact on the material's performance, and long-lasting flame retardancy, but the operation and processing technology are more complex.
3. Other flame retardants:
Polymers such as brominated styrene, Declone, decabromodiphenyl ether, and red phosphorus each have their own advantages and disadvantages.

Our Qibo Technology Co., Ltd. has launched PA flame-retardant masterbatch, which greatly reduces the risk of PA combustion without affecting its performance. Our flame-retardant masterbatch has high wear resistance, high thermal stability, excellent strength and hardness, high mechanical damping characteristics, and also has good sliding performance.