DS628 High-Performance High temperature Hot Melt Adhesive Film Fully Empowers Multifunctional Industrial Bonding

In modern manufacturing processes, efficient and high-quality bonding of materials is key to determining the quality of the final product. Shenzhen Tunsing Plastic Products Co., Ltd. recently released the latest version (V1.4) of the Product Data Sheet for its DS628 Hot Melt Adhesive Film. With its excellent physical performance and precise thermodynamic behavior, it once again demonstrates its professional status in the field of hot melt adhesive bonding.

Shenzhen Tunsing Plastic Products Co., Ltd. DS628 is a premium thermoplastic hot-melt adhesive film. It is supported by release paper and features the excellent characteristic of being able to be repeatedly heated and plasticized. The product utilizes an advanced polyurethane synthetic modification formulation, which endows the film with a unique physical structure and hand feel.

DS628 exhibits strong adhesion to a variety of polar and non-polar substrates:

• Textiles
• Thermoplastic Polyurethane (TPU)
• Polycarbonate (PC)
• Polyvinyl Chloride (PVC)

With its good feel, resilience, excellent heat resistance, and outstanding cold resistance, DS628 is widely used in high-end and daily consumer goods manufacturing sectors:

• Clothing and embroidery
• Footwear, luggage, and handbags
• Toys, hats, and sporting goods materials

As a technology-driven product, various parameters of DS628 have undergone strict laboratory testing to provide engineers with clear and reliable quantitative references:

In the latest V1.4 version, Shenzhen Tunsing Plastic Products Co., Ltd. introduced scientific Differential Scanning Calorimetry (DSC) curves and dynamic parallel-plate rheological testing to visualize the microscopic thermal transition process of the adhesive film:

• Glass Transition Temperature (Tg): Strictly tested by the NETZSCH DSC 214 instrument, an obvious endothermic effect can be found near -23.1°C, which represents the glass transition temperature of the adhesive film, ensuring its excellent flexibility and cold resistance in low-temperature environments.
• Viscoelastic Transition Temperature: In the dynamic mechanical measurement using an Anton Paar rotational rheometer, the storage modulus ($G'$) and loss modulus ($G''$) intersect precisely at 104.1°C. This indicates that the material officially transitions from a viscoelastic solid to a viscoelastic fluid at this temperature, demonstrating outstanding melt flowability and penetration bonding capability.

To achieve optimal bonding strength, Shenzhen Tunsing Plastic Products Co., Ltd. recommends the following two-stage lamination parameters as a reference (subject to adjustment based on actual substrates and equipment):

• First Lamination:
  • Mechanical Mold Temperature: 130 - 170°C
  • Time: 5 - 15 seconds
  • Pressure: 0.3 - 0.6 MPa
• Second Lamination:
  • Mechanical Mold Temperature: 140 - 180°C
  • Time: 8 - 25 seconds
  • Pressure: 0.3 - 0.6 MPa

Technical Tip: Bonding temperature, pressure, and time are the three core elements related to the final bonding strength of the hot melt adhesive film on the material. In actual operations, 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 should establish ideal construction conditions through detailed testing prior to production.

Shenzhen Tunsing Plastic Products Co., Ltd. is located in Pingshan District, Shenzhen. Over the years, the company has focused on the R&D and manufacturing of eco-friendly hot-melt adhesive materials. The company strictly implements product optimization and technical iterations. Every piece of technical data originates from its professional laboratory, aiming to provide global manufacturing industries with more reliable and greener bonding solutions