PA12 Long Carbon Fiber (LCF) reinforced composite is a high-performance engineering thermoplastic material based on a Polyamide 12 (PA12) matrix, reinforced with continuous long carbon fibers. This material combines the excellent toughness, low moisture absorption, and chemical resistance of PA12 with the superior strength, stiffness, and fatigue resistance provided by long carbon fibers. It is designed for advanced lightweight structural applications.

In the automotive industry, it is used because it is cheaper and lighter than metal. In machines, it is used over other materials due to its high flexibility and durability. 

Nylon 6,6, is a more crystalline version of nylon 6. It is also referred to as polyamide 66 or PA 66. It has improved mechanical properties due to its more ordered molecular structure. Nylon 66 for machining has improved temperature resistance and lower rates of water absorption when compared to standard nylon 6.

Pa12 gf20 is a type of engineering plastic that consists of polyamide 12 (pa12) compounds reinforced with 20% glass fibers. It is a high-performance material that has many advantages over pure nylon 12, such as higher strength, stiffness, thermal resistance, chemical resistance, and electrical properties. Pa12 gf20 is widely used for various applications in different industries, such as automotive, aerospace, medical, electrical, and industrial.

PPS is a high-performance, tough engineering plastic with great dimensional and thermal stability, as well as a wide operating temperature range of up to 260 °C and good chemical resistance. Moreover, PPS, like most other thermoplastics, is an electrical insulator. Its ability to be used at high temperatures coupled with its thermal stability makes PPS great for applications such as semiconductor components in machinery, bearings, and valve seats.

The reason behind choosing polyamide over other materials will vary for different applications. When using polyamide for electrical cable protection, it offers better performance, flexibility, and impact resistance than PVC protection. In the automotive industry, it is used because it is cheaper and lighter than metal. In machines, it is used over other materials due to its high flexibility and durability.