SainSmart Flex TPU Air Lightweight Foaming TPU Filament 1.75mm

Combine ultra-lightweight performance with customizable flexibility using SainSmart Flex TPU Air Lightweight Foaming TPU Filament. Utilizing cutting-edge active foaming technology, this innovative 1.75mm flexible material allows you to adjust part hardness, weight, and density on demand simply by tweaking your print temperatures and extrusion rates.

Key Advantages

• Customizable Shore Hardness (77A – 93A): Tune flexibility layer-by-layer simply by varying nozzle temperature and speed. Print dense, firmer structures at lower temperatures or activate foaming at higher heat to yield softer, squishier, and lighter sections.
• Active Foaming & Mass Reduction: Expands up to 172% in volume during printing, slashing part weight by up to 50% compared to traditional solid TPU. A single 1kg spool prints the equivalent volumetric output of 2kg of standard TPU material.
• High Resilience & Shock Absorption: Engineered for extreme rebound elasticity, returning rapidly to its original shape after heavy impact or compression—making it perfect for high-wear footwear, grips, and sports padding.
• Smooth Matte, Soft-Touch Finish: Micro-foaming action suppresses glossy surface reflections and masks layer lines, delivering a velvety, soft-touch tactile feel ideal for wearables and direct skin contact.
• Versatile Application Potential: Perfect for lightweight RC plane tires, protective drone bumpers, orthopedic shoe insoles, sports gear, custom grips, and ergonomic wearable technology.

Specifications & Compatibility

• Filament Diameter: 1.75mm
• Shore Hardness Range: Adjustable from 77A (softer/foamed) to 93A (firmer/unfoamed)
• Maximum Volume Expansion: Up to 172%
• Finish: Satin Matte, Soft-Touch
• Printer Compatibility: Optimized for direct-drive FDM 3D printers configured for 1.75mm flexible materials.