Tunsing Introduces DS8501 Polyurethane Hot Melt Adhesive Film for Superior Multi-Field Bonding hot melt adhesive factory

[SHENZHEN] As the clothing, footwear, luggage, and electronic embroidery industries increasingly demand better hand feel, environmental performance, and bond strength, the market for high-performance hot melt adhesive films continues to grow rapidly. Shenzhen Tunsing Plastic Products Co., Ltd. has officially released the latest upgraded version of its polyurethane (TPU) hot melt adhesive film — DS8501.

As a thermoplastic film-like hot melt adhesive engineered for high-quality bonding, DS8501 provides an industry-leading seamless bonding solution for clothing, embroidery, footwear, luggage, handbags, hats, and sporting goods, thanks to its outstanding lamination adaptability, excellent hand feel, resilience, and superior resistance to both heat and cold.

1. Superior Adhesion to Diverse Substrates DS8501 exhibits exceptional adhesion strength, particularly to pearlescent paper, textiles, TPU, and PVC materials, making it ideal for multi-material composite bonding in complex manufacturing processes.

2. Controlled Flow Value & Soft Hand Feel Featuring a low flow value, the product effectively controls glue overflow. It retains good elasticity and resilience while bestowing a soft hand feel upon the finished product, significantly enhancing comfort and product quality.

3. Exceptional Heat and Cold Resistance DS8501 delivers outstanding thermal stability and low-temperature durability. With a glass transition temperature (Tg) as low as $-20\pm10^{\circ}\text{C}$ (with microscopic Tg measured at approx. $-14.8^{\circ}\text{C}$ via Differential Scanning Calorimetry / DSC), it maintains flexibility and strong adhesion even in freezing environments.

4. Precise Rheological Behavior & Viscoelastic Transition According to tests using an Anton Paar rotational rheometer, the intersection point of storage modulus ($G'$) and loss modulus ($G''$)—the temperature at which the material transitions from a viscoelastic solid to a viscoelastic fluid—is approximately $122.1^{\circ}\text{C}$, ensuring smooth, uniform flow and optimal wetting during heat pressing.

To achieve optimal peel strength and bonding performance, Tunsing recommends the following baseline conditions, adjustable according to specific machinery and substrates:

• First Lamination (With Release Paper):

  • Mechanical Mold Temperature: $150^{\circ}\text{C} - 170^{\circ}\text{C}$

  • Time: $8 - 25 \text{ seconds}$

  • Pressure: $0.3 - 0.6 \text{ MPa}$

• Second Lamination (Release Paper Peeled Off):

  • Mechanical Mold Temperature: $160^{\circ}\text{C} - 180^{\circ}\text{C}$

  • Time: $5 - 15 \text{ seconds}$

  • Pressure: $0.3 - 0.6 \text{ MPa}$

(Note: Bonding strength is closely tied to bonding temperature, pressure, and press time. Users should perform detailed verification and trial testing under actual production conditions prior to full-scale manufacturing.)

Thanks to the elasticity and durability of TPU, DS8501 hot melt adhesive film is widely utilized across various sectors:

• Apparel & Seamless Textiles: Garment bonding, seamless underwear, and athletic wear components.

• Computerized Embroidery & Patches: Backing adhesive for embroidered badges, emblems, and fabric patches.

• Footwear, Luggage & Handbags: Shoe upper lamination, bag reinforcement, and handbag structure shaping.

• Headwear & Sporting Goods: Cap brim lamination and outdoor sports equipment bonding.

Shenzhen Tunsing Plastic Products Co., Ltd. is a leading domestic manufacturer specializing in hot melt adhesive films and advanced polymer bonding materials. Committed to long-term R&D, production, and application development, Tunsing provides tailored bonding solutions for global customers backed by strict quality control and technical expertise.