PA6 (Polyamide 6, Nylon 6) is a semi-crystalline general-purpose engineering plastic with excellent toughness, wear resistance and self-lubrication. 

Its basic density is less affected by crystallinity and water absorption, neat resin has a stable density range, and different modified types bring obvious density differences, with minor differences among different grades and modified types, as detailed below:

General-Purpose Neat PA6: 1.12～1.14 g/cm³, typical value 1.13 g/cm³, the most commonly used density standard for basic grades

Glass Fiber Reinforced PA6 (10%～30% Glass Fiber): 1.17～1.40 g/cm³, the higher the glass fiber content, the more significant the density increase, with simultaneous improvement of rigidity and strength

Mineral Filled PA6 (Talc / Calcium Carbonate Filled): 1.16～1.30 g/cm³, density is positively correlated with filler loading, focusing on improving dimensional stability and reducing cost

Flame Retardant PA6 (Halogen-Free / Halogenated): 1.14～1.20 g/cm³, halogen-free flame retardant systems have slightly higher density than neat PA6, halogenated systems have relatively larger density increase

Toughened Modified PA6 (Cold Resistant / Impact Type): 1.12～1.16 g/cm³, toughening agent addition causes slight density fluctuation, core improvement of low-temperature toughness and impact resistance

Glass Fiber + Mineral Composite Reinforced PA6: 1.18～1.35 g/cm³, balancing the strength of glass fiber and dimensional stability of minerals, density between single reinforcement systems

This density parameter is a core basis for the design of automotive parts, electronic and electrical connectors, mechanical gears, bearings, textile accessories and other products. The stable density brought by semi-crystalline structure makes it widely used in structural parts with high mechanical performance and dimensional accuracy requirements. Density calculation is also key data for product weight control, mold design, assembly clearance matching and injection molding parameter setting, while supporting its core properties of high toughness, wear resistance and self-lubrication.