MC901 rod is a high-performance engineering plastic rod based on polyamide (nylon) and modified by compounding special additives (such as glass fiber, impact modifier, etc.). Its core component is PA6 (polycaprolactam) or PA66 (polyhexamethylene adipate), and the rigidity is enhanced by adding about 10%-40% glass fiber (GF), and the comprehensive performance is optimized by combining other functional fillers (such as flame retardants, UV inhibitors, toughening agents, etc.).
The core value of MC901 rod lies in balancing the lightweight advantages of nylon with the strength and heat resistance requirements of metal/traditional engineering plastics, while maintaining good processing flexibility, and is suitable for complex scenarios with high requirements for mechanical strength, dimensional stability, and chemical resistance.
Advantages
Mechanical properties
High strength and high rigidity
Glass fiber reinforcement: By adding 30%-40% glass fiber (GF), the tensile strength of MC901 rods is increased to 120-150 MPa (pure PA6 is only 50-70 MPa), and the flexural modulus is 6-8 GPa, which can replace some lightweight metals (such as aluminum alloy) for structural parts.
Impact modification: After compounding toughening agents (such as EPDM rubber), the notched impact strength can reach 8-12 kJ/m² (pure PA6 is about 5-8 kJ/m²), and it still maintains toughness in low temperature environments to avoid brittle fracture.
Dimensional stability
The directional arrangement of glass fibers significantly reduces the expansion rate caused by water absorption, and the water absorption rate is reduced from 10% of pure PA6 to 1%-3% (after modification), and the dimensional change rate (23℃/50%RH to 85℃/85%RH) is <0.2%, which is suitable for the high precision requirements of precision mechanical parts (such as gears and bearing seats). Heat resistance and aging resistance performance
High temperature stability
The heat deformation temperature (HDT, 1.82 MPa load) can reach 180-210℃, and the short-term temperature peak value exceeds 200℃ (such as short-term contact with steam and high-temperature molds), which is much higher than the 80-100℃ of pure PA6, meeting the use requirements of automobile engine peripherals and home appliance heating components.
The long-term use temperature is recommended to be -40℃ to 120℃ (under continuous load conditions), which is suitable for continuous operation of industrial equipment.
Chemical corrosion resistance
It shows excellent tolerance to common industrial media (such as lubricating oil, hydraulic oil, coolant, weak acid and alkali), and the strength retention rate is >90% after long-term immersion (more than 1 year); but it should be used with caution for strong oxidizing acids (concentrated sulfuric acid, concentrated nitric acid) and aromatic hydrocarbons (gasoline).
Anti-UV and weather resistance
After adding anti-UV stabilizers (such as hindered amine light stabilizers), the yellowing index ΔYI <3 after 1000 hours of outdoor exposure (pure PA6 ΔYI can reach more than 10), which is suitable for automotive exterior parts, outdoor equipment housings, etc.
Lightweight and economical
The density is only 1.35-1.45 g/cm³ (aluminum alloy is about 2.7 g/cm³, steel is about 7.8 g/cm³), which can significantly reduce the weight of parts. It is suitable for fields such as automobiles and aerospace that are sensitive to weight reduction, and the weight reduction effect can reach 40%-60%.
The comprehensive cost (material + processing) is about 1/2-2/3 of aluminum alloy and 1/4-1/3 of stainless steel. At the same time, the processing cycle is short (injection molding/machining efficiency is 30%-50% higher than metal), which is especially suitable for small and medium-sized batch production.
Easy processing and environmental protection
It can be formed by injection molding, extrusion, CNC machining (turning, milling, drilling) and other methods; the injection molding cycle is short (such as the gear injection molding cycle is about 30-60 seconds), and the processing surface roughness Ra can reach 0.8-1.6 μm (directly meet the assembly requirements and reduce the subsequent polishing costs).
Although it is a thermoplastic, it can be recycled and reused (but the recycling performance will be slightly reduced after glass fiber reinforcement); some manufacturers provide bio-based PA6 (such as castor oil-based) or degradable formula versions, which are in line with environmental protection trends.
