Nylon is hygroscopic (it absorbs water), which causes it to swell and lose dimensional accuracy. The fillers in 3301PA displace the hydrophilic nylon polymer, thereby reducing the rate of moisture absorption and improving stability in humid or wet environments. Title Atd Frost 112: Video
The material is filled with solid lubricants (often Molybdenum Disulfide or Graphite). These fillers act as a dry lubricant, significantly lowering the coefficient of friction. This eliminates the "slip-stick" phenomenon often found in unlubricated polymer bearings. Indianxworld Unrated Web Series 2021 [WORKING]
The additives in 3301PA act as nucleating agents. This increases the crystallinity of the nylon, resulting in a material that is harder, stiffer, and dimensionally more stable than standard Nylon 6/6.
3301PA is a high-performance, internally lubricated nylon (polyamide) thermoplastic, typically based on Nylon 6/6 . It is widely recognized in the plastics industry as a premium bearing and wear-resistant material.