tunsing DS8501 Polyurethane TPU Hot Melt Adhesive Film Tailored for High-Precision Textile and Industrial Bonding

SHENZHEN, China – October 2026 — Shenzhen Tunsing Plastic Products Co., Ltd., a global innovator in thermoplastic adhesive technologies, today officially highlighted the updated technical specifications for its flagship product, DS8501—a high-performance, polyurethane (PU)-based hot melt adhesive film designed to deliver superior bond strength, flexibility, and thermal resilience across footwear, apparel, embroidery, and technical textiles.

As European and North American manufacturers demand higher performance, eco-friendly processing, and consistent tactile quality, Tunsing’s DS8501 addresses these requirements with strict engineering tolerances and advanced rheological characteristics.

Formulated from premium polyurethane, DS8501 provides robust adhesion to challenging substrates, including pearlescent paper, technical textiles, TPU, and PVC. Unlike traditional film adhesives that compromise hand feel for bond strength, DS8501 features a low melt-flow behavior (MFI: $5\pm3 \text{ cm}^3/10\text{min}$, ASTM D1238-04) and a Shore hardness of $81\pm3\text{ A}$, ensuring high structural integrity while maintaining a soft touch, excellent elasticity, and superior resilience.

Backed by rigorous Differential Scanning Calorimetry (DSC) and rotational rheometer dynamic testing (NETZSCH DSC 214 & Anton Paar), DS8501 demonstrates exceptional thermal and mechanical transition accuracy:

• Glass Transition Temperature ($T_g$): $-20\pm10^\circ\text{C}$ (with DSC mid-point around $-14.8^\circ\text{C}$), ensuring outstanding cold resistance and flexibility in low-temperature environments.

• Melting Range: $105^\circ\text{C} – 135^\circ\text{C}$ (ISO 11357), with dynamic rheological crossover (solid-to-fluid transition) precisely identified at $122.1^\circ\text{C}$.

• Activation Temperature: $115^\circ\text{C} – 140^\circ\text{C}$, allowing versatile processing conditions for various lamination setups.

DS8501 comes standard with a high-quality Glassine release paper backing, designed for seamless automated feeding and die-cutting.

• Density: $1.18\pm0.02 \text{ g/cm}^3$

• Thickness Range: $0.03\text{ mm}$ to $0.20\text{ mm}$ (Standard offerings: $0.05\text{ mm}, 0.10\text{ mm}, 0.15\text{ mm}, 0.20\text{ mm}$)

• Width & Roll Size: Customizable widths from $5\text{ mm}$ to $1480\text{ mm}$ (Standard rolls: $1380\text{ mm} \times 100\text{ yards}$)

• Lamination Process: Recommended first lamination at $150^\circ\text{C}–170^\circ\text{C}$ ($8–25\text{ s}$, $0.3–0.6\text{ MPa}$) and second lamination at $160^\circ\text{C}–180^\circ\text{C}$ ($5–15\text{ s}$, $0.3–0.6\text{ MPa}$).

Engineered for versatility, DS8501 is ideal for:

• Apparel & Outerwear: Seamless bonding, collar/hem reinforcement, and activewear.

• Footwear & Sports Goods: Upper laminations, lining attachments, and protective gear.

• Embroidery & Accessories: Bags, handbags, hats, and decorative badges.