SHENZHEN, CHINA – As the global "athleisure" and seamless apparel markets continue to expand across Europe and North America, Shenzhen Tunsing Plastic Products Co., Ltd. has announced the latest technical refinement of its flagship DS3412 Hot Melt Adhesive Film. Specifically engineered to address the manufacturing challenges of high-elasticity textiles, DS3412 is setting a new standard for durability and "zero-feel" comfort in the intimate apparel industry.
For premium brands in the West, the primary pain point in seamless garment construction is maintaining the integrity of the bond without sacrificing the fabric's natural stretch. Traditional adhesives often create "stiff" seams that crack under tension or lose their shape after repeated wear.
DS3412 is a thermoplastic polyurethane (TPU) material designed specifically for super-elastic fabrics like Lycra, spandex, and nylon. With a Shore A hardness of $52pm2$, it provides an ultra-soft hand-feel that integrates seamlessly with the garment, ensuring that high-performance activewear and one-piece underwear maintain their shape and resilience.
Understanding that European and American production lines require rigorous technical transparency, Tunsing has released comprehensive thermal and rheological data for DS3412:
Thermal Stability: Differential Scanning Calorimetry (DSC) testing identifies a glass transition temperature ($T_{g}$) of $-41.9^{circ}C$, ensuring the adhesive remains flexible even in cold climates.
Flow Dynamics: With a Melt Flow Index (MI) of 8±3cm³/10min, DS3412 offers controlled viscosity during the heating process, preventing "strike-through" on delicate fabrics
Phase Transition: Dynamic mechanical analysis shows a solid-to-fluid transition at 129.1°C, allowing for precise calibration of bonding equipment.
| Feature | Specification |
| Composition | Polyurethane (TPU) |
| Color | Transparent |
| Specific Gravity | $1.15pm0.02g/cm^{3}$ |
| Activation Temp | 150-170 °C |
| Standard Thicknesses | 0.025mm, 0.05mm, 0.10mm |
| Width Range | 5mm – 1580mm |
To maximize factory throughput, DS3412 is optimized for a two-stage lamination process. The first lamination occurs at 150°C-170°C for 5-15 seconds, followed by a second lamination at 150°C-180°C for 8-25 seconds. This ensures a uniform, high-strength bond across various machinery and material types
"Our goal with Version 1.4 was to provide a product that doesn't just stick, but performs," says the Tunsing engineering team. "By providing full DSC and viscosity curves, we empower our international partners to achieve a perfect bond every time."
About Shenzhen Tunsing Plastic Products Co., Ltd. Located in the Pingshan District of Shenzhen, Tunsing is a leader in thermoplastic adhesive technology, specializing in innovative solutions for the global textile and electronics industries.
