[SHENZHEN] In sectors such as textiles and apparel, footwear, luggage and handbags, and electronic embroidery, the diversity of materials and variations in processing conditions place higher performance demands on hot melt adhesive films. Shenzhen Tunsing Plastic Products Co., Ltd., a leading domestic manufacturer of hot-melt polymer adhesive materials, has officially launched its dual-flagship polyurethane (TPU) hot melt adhesive film series: DS8501 and DS8502.
Both products utilize high-quality polyurethane and glassine release paper structures, offering excellent tensile elasticity and a soft hand feel. However, through distinct molecular designs, they present unique technical characteristics in melt flowability, processing temperatures, and low-temperature limits, providing precisely matched options for different processing conditions and substrate lamination.
While maintaining high bond strength and a soft hand feel, the two adhesive films achieve differentiated physical and thermal characteristics through distinct formulations:
| Core Technical Parameter | Standard / Test Method | DS8501 (High Temperature & High Resilience Type) | DS8502 (Low Temp, High Flow & Efficient Type) | Parameter Comparison Advantages & Application Focus |
| Melt Flow Index (MFI) | ASTM D1238-04 | 5±3 cm³/10min |
17±7 cm³/10min |
DS8501 features low flow characteristics to effectively prevent glue overflow; DS8502 offers higher flowability and wetting capacity, ideal for rapid impregnation and lamination. |
| Melting Range | ISO 11357 | 105°C - 135°C (DSC Peak: 124.4°C) |
80°C - 105°C (DSC Peak: 96.5°C) |
DS8502 features a significantly lower melting point, adapting to lower press temperatures and protecting heat-sensitive substrates. |
| Rheological Transition (G'/G'' Crossover) | Rotational Rheometer (2.5°C/min) | 122.1°C |
98.1°C |
DS8502 transitions from solid to fluid state below 100°C, enabling higher processing efficiency. |
| Glass Transition Temp. (Tg) | GB/T 19466.2 | -20±10°C (DSC Test: -14.8°C) |
-25±10°C (DSC Test: -31.1°C) |
DS8502 delivers superior ultra-low temperature resistance, remaining flexible and crack-resistant in extreme cold. |
| Hardness (Shore A) | — | 81±3 Shore A |
72±3 Shore A |
DS8502 has a lower hardness, imparting a softer, smoother hand feel; DS8501 offers balanced resilience and structural support. |
| Recommended Press Temp (2nd Lamination) | — | 160°C - 180°C |
130°C - 160°C |
DS8502 requires lower heat-press temperatures (reducing by 20°C-30°C), saving energy and shortening cycles. |
| Extended Substrate Adhesion | — | Pearlescent paper, textiles, TPU, PVC |
Textiles, TPU, PC, PVC |
DS8502 provides enhanced adhesive affinity toward PC (Polycarbonate) materials. |
| Width & Thickness Range | — | Width: 5-1480mm Thickness: 0.03-0.20mm |
Width: 5-1580mm Thickness: 0.0125-0.15mm |
DS8502 offers ultra-thin specs down to 0.0125mm and extra-wide rolls up to 1580mm for lightweight needs. |
DS8501: The Premier Solution for High Heat Resistance and Structural Shaping With a melting range of 105°C-135°C and strong glue overflow control, DS8501 is ideally suited for apparel lamination, footwear shaping, luggage, and sports equipment manufacturing that demand rigorous structural support, tensile resilience, and high-temperature washing durability.
DS8502: A Breakthrough for Low-Temp Rapid Pressing and Ultra-Soft Hand Feel Featuring a high melt flow index of 17±7 cm³/10min and a microscopic glass transition temperature down to -31.1°C, DS8502 achieves fast, secure bonding at lower temperatures (130°C-160°C). Its softer texture (72 Shore A) and affinity for PC materials make it exceptional for seamless underwear, high-end embroidery badges, ultra-thin shoe upper lamination, and electronic component composites.
Shenzhen Tunsing Plastic Products Co., Ltd. is a leading manufacturer specializing in hot melt adhesive films and advanced polymer bonding materials. Committed to long-term research, production, and application development in the hot melt sector, Tunsing provides tailored bonding solutions to global customers backed by strict quality control and technical expertise.
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