NanoShield Antibacterial Masterbatch BS-AB100

Key Technical Specifications

NanoShield BS-AB100 is engineered around graphene microsphere technology, delivering broad-spectrum antibacterial performance without relying on silver ions. Below are the core parameters that define its capability.

Parameter	Value
Active Ingredient	Graphene Microspheres (Silver-Free)
Antibacterial Rate	≥ 99.9%
Recommended Dosage	2–5 wt%
Processing Temperature	180–260 °C
Compliance	FDA 21 CFR 177.1550
Target Polymers	PE, PP, PET, PVC, TPU
Shelf Life	24 months (sealed, dry storage)

Parameter Deep-Dive

Antibacterial Mechanism

Unlike conventional silver-ion masterbatches that risk cytotoxicity at high loadings, BS-AB100 employs nano-scale graphene microspheres that physically disrupt bacterial cell membranes. This mechanical mode of action is effective against E. coli, S. aureus, and C. xerosis — the three standard test organisms in JIS Z 2801 — while remaining inert to mammalian cells, making it suitable for food-contact and medical-device applications.

Silver-Free Advantage

Regulatory pressure on silver-based biocides is tightening worldwide. The EU Biocidal Products Regulation now classifies nano-silver as a substance of very high concern. BS-AB100 sidesteps this entirely: graphene microspheres carry no heavy-metal classification, simplifying REACH registration and eliminating the need for separate biocidal product authorization.

Processing Compatibility

The masterbatch carrier resin is a low-MFI polyethylene wax, ensuring uniform dispersion across a wide processing window (180–260 °C). It is compatible with single-screw and twin-screw extrusion, injection molding, and blow molding without requiring screw modifications or additional compounding steps.

Application Scenarios

Food Packaging

At 3 wt% loading, BS-AB100 meets FDA food-contact requirements and delivers sustained antibacterial activity throughout the product lifecycle. Ideal for fresh-produce trays, deli containers, and flexible films where microbial growth during storage is a concern.

Medical Devices

For catheter housings, specimen containers, and diagnostic device enclosures, BS-AB100 provides a non-leaching antibacterial surface that withstands gamma and EtO sterilization without performance degradation.

Consumer Plastics

Kitchen utensils, cutting boards, toothbrush handles, and toy components benefit from the permanent antibacterial surface that does not wash off or migrate — a key differentiator over surface-coated alternatives.