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Highly concentrated carbon black dispersion for exceptional color strength and jetness.
Optimized for polyamide (PA6, PA66) matrices with excellent thermal stability up to 300°C.
Low dust formulation ensuring improved workplace safety and operator handling.
Consistent rheology and melt flow compatibility for trouble-free processing in extrusion and injection molding.
UL94 V-0 compliant when compounded at recommended loadings in flame-retardant polyamide systems.
Automotive under-hood components requiring high heat resistance and dimensional stability.
Electrical connectors and housings demanding EMI shielding and flame retardancy.
Industrial fluid-handling parts exposed to aggressive chemicals and elevated temperatures.
Precision-engineered gears and structural parts in polyamide-based engineering plastics.
Consumer appliance housings requiring consistent matte-black aesthetics and surface hardness.
| Chemical Type | Carbon black masterbatch for polyamide |
| Product Form | Free-flowing granules |
| Appearance | Uniform black granules, no visible specks or dust |
| Carrier Resin | PA6 (polyamide 6) |
| Carbon Black Content | 25 wt% ±1% |
| Density (23°C) | 1.15–1.20 g/cm³ |
| Melt Flow Index (250°C/2.16 kg) | 25–35 g/10 min |
| Recommended Use Level | 2–5 wt% in final polyamide compound |
Q1: What is the primary function of Cabot PA3785 Masterbatch in polymer processing?
A: Cabot PA3785 Masterbatch is a high-performance carbon black–based concentrate designed to provide consistent jetness, enhanced UV protection, and improved electrical conductivity in engineering thermoplastics—particularly polyamide (PA) and polyphthalamide (PPA) compounds.
Q2: Is Cabot PA3785 compatible with common polyamide grades such as PA6 and PA66?
A: Yes, Cabot PA3785 is specifically formulated for compatibility with aliphatic polyamides including PA6, PA66, and their blends. It demonstrates excellent dispersion stability during melt compounding and injection molding without compromising mechanical integrity or thermal stability.
Q3: How should Cabot PA3785 be incorporated into the final compound?
A: It is typically introduced via gravimetric or volumetric dosing directly into the feed throat of an extruder or injection molding machine. Pre-drying is not required, but optimal dispersion is achieved when processed at standard polyamide processing temperatures with adequate screw shear and residence time.
Q4: Does Cabot PA3785 affect the crystallinity or moisture sensitivity of polyamide systems?
A: While carbon black can influence nucleation behavior, Cabot PA3785 is engineered to minimize unintended effects on crystallization kinetics and does not significantly alter the inherent hygroscopic nature of polyamides. Standard drying protocols for the base resin remain applicable.
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