About us:
Shenzhen Tunsing Plastic Products Co., Ltd. recently officially released the latest V1.4 version of the Product Data Sheet for its star product —— DS628 Hot Melt Adhesive Film. The new data sheet not only refines the product application guidelines but also introduces advanced Differential Scanning Calorimetry (DSC) and dynamic parallel-plate rheological test curves for the first time, providing global manufacturing engineers with a quantitative reference of high scientific and practical value.
DS628 is a high-performance thermoplastic hot-melt adhesive film supported by glassine release paper. It is formulated with polyurethane synthetic modification and features the excellent physical characteristic of being able to be repeatedly heated and plasticized.
Through rigorous R&D testing, the adhesive film has demonstrated outstanding bonding performance on a variety of industrial and consumer substrates:
Excellent Material Compatibility: It exhibits strong adhesion to textiles, thermoplastic polyurethane (TPU), polycarbonate (PC), and polyvinyl chloride (PVC).
Superior Physical Sensation: It combines a good hand feel with excellent resilience.
Extreme Environmental Resistance: It possesses good heat resistance and excellent cold resistance (resistance to severe cold).
Leveraging these core advantages, DS628 is widely used for bonding materials in diversified fields such as clothing, embroidery, footwear, luggage, handbags, toys, hats, and sporting goods.
As a technology-driven enterprise, Shenzhen Tunsing Plastic Products Co., Ltd. has fully disclosed the microscopic thermodynamic behavior of DS628 in the V1.4 version through precise laboratory instrument testing:
Proportion/Density: $1.18 pm 0.02 text{ g/cm}^3$
Hardness: $72 pm 2 text{ (Shore A)}$
Melt Flow Index (MFI): $10 pm 5 text{ cm}^3/10text{min}$ (based on the ASTM D1238-04 standard)
Melting Range: 105 - 125°C (based on the ISO11357 standard)
Using the NETZSCH DSC 214 test equipment under a nitrogen atmosphere and a heating rate of $10^{circ}C/text{min}$ (testing range from $-80^{circ}C$ to $200^{circ}C$), the thermal effects of the material were clearly recorded:
Glass Transition Temperature (Tg): A distinct endothermic effect occurs near -23.1°C, which is judged as the glass transition temperature of the adhesive film, ensuring its flexibility and resilience in low-temperature environments.
Melting Temperature (Tf): A clear endothermic peak appears near 110.7°C, which is judged as the melting temperature of the hot melt adhesive film, visually reflecting the critical point where it begins to melt completely.
An Anton Paar rotational rheometer was utilized in a dynamic parallel-plate mode for temperature ramp testing (at a heating rate of $2.5^{circ}C/text{min}$). As the temperature rose, the storage modulus ($G'$) and loss modulus ($G''$) decreased as expected:
Transition Point: The two modulus curves intersect precisely at approximately 104.1°C. According to international rheological conventions, the temperature at which the storage modulus and loss modulus intersect represents the transition of the material from a viscoelastic solid to a viscoelastic fluid. This provides a solid physical foundation for high-strength bonding.
To meet the processing requirements of automated assembly lines, DS628 provides standardized specifications and recommended lamination parameters:
Production Specification Standards:
Thickness Range: 0.0125mm - 0.2mm (conventional thickness options include 0.05mm, 0.08mm, 0.10mm, and 0.15mm).
Width Range: 5mm - 1580mm (conventional width is 1380mm).
Standard Packaging: 1380mm * 100 yard/roll.
Process Lamination Conditions (Basic Laboratory Reference):
First Lamination: Mechanical mold temperature of 130 - 170°C, bonding time of 5 - 15 seconds, and pressure of 0.3 - 0.6 MPa.
Second Lamination: Mechanical mold temperature of 140 - 180°C, bonding time of 8 - 25 seconds, and pressure of 0.3 - 0.6 MPa.
Technical Tip from Shenzhen Tunsing Application Engineers: In actual production, bonding strength is closely related to temperature, pressure, and time. The bonding temperature must be close to the temperature set by the machine, the pressure must be uniform, and the mold and press rolls must be smooth and flat. Since bonding conditions vary across different machinery and materials, users are strongly advised to establish ideal construction conditions through detailed verification prior to formal production.
Shenzhen Tunsing Plastic Products Co., Ltd. is headquartered in Longtian Street, Pingshan District, Shenzhen, China. As an innovative enterprise in the field of hot melt adhesive applications, Shenzhen Tunsing Plastic Products Co., Ltd. is always committed to providing the global manufacturing industry with eco-friendly and stable industrial bonding solutions through a scientific, transparent, and traceable data system.
