Crafting Texture and Durability: Tunsing Launches DS823 High Weather-Resistant Polyurethane Hot Melt Adhesive Film

Shenzhen, China — As high-end textiles, seamless apparel, and lightweight outdoor gear demand increasingly stringent performance from adhesive materials, Shenzhen Tunsing Plastic Products Co., Ltd. has officially launched its newly upgraded DS823 Polyurethane Hot Melt Adhesive Film. Specifically engineered for bonding applications that demand an ultimate soft hand feel, high elasticity, and superior weather resistance, DS823 provides robust technical support for laminating textiles, TPU, PVC, and other substrates.

1. High Melting Point & Excellent Heat Resistance for Demanding Conditions

   DS823 features a melting range of 105–135°C, an activation temperature of 115–140°C, and a transition temperature to a viscoelastic fluid of approximately 122.1°C (based on Anton Paar rotational rheometer testing). These characteristics impart outstanding high-temperature resistance, preventing glue overflow or delamination during downstream processing or high-heat end-use environments.

2. Controlled Low Flow (MFI 5±3) to Prevent Glue Penetration

   The Melt Flow Index (MFI) of DS823 is strictly controlled at 5 ± 3 cm³/10min (ASTM D1238-04). This low flow rate ensures that the adhesive film does not excessively penetrate fabrics or cause strike-through during high-temperature pressing, making it ideal for breathable fabrics and high-precision seamless bonding.

3. Superior Soft Hand Feel & Elastic Resilience to Elevate Product Quality

   With a moderate hardness of 81 ± 3 Shore A and a density of 1.18 ± 0.02 g/cm³, combined with the natural elasticity of thermoplastic polyurethane (PU), DS823 imparts excellent soft tactile comfort and wrinkle-resistant recovery to laminated fabrics—making it perfect for premium garments and next-to-skin wearable applications.

4. Broad Thermal Range Weather Resistance (Tg -20°C) with Low-Temperature Flexibility

   Tested via Differential Scanning Calorimetry (DSC), DS823 exhibits a glass transition temperature (Tg) of -20 ± 10°C (with an actual DSC peak around -14.8°C). Even under cold weather conditions, the adhesive layer maintains its toughness and peel strength, delivering balanced hot and cold temperature resistance.

• Composition & Structure: Polyurethane, supported by a single-sided Pearlescent Paper release protection layer.

• Appearance / Color: Fully Transparent.

• Density / Specific Gravity: 1.18 ± 0.02 g/cm³.

• Shore Hardness: 81 ± 3 Shore A.

• Melt Flow Index (MFI): 5 ± 3 cm³/10min (ASTM D1238-04).

• Melting Range: 105°C – 135°C (ISO 11357).

• Activation Temperature: 115°C – 140°C.

• Glass Transition Temperature (Tg): -20 ± 10°C (GB/T 19466.2-2004).

• Conventional Specifications:

  • Thickness Range: 0.03mm – 0.20mm (Conventional thicknesses: 0.05mm, 0.10mm, 0.15mm, 0.20mm)

  • Width Range: 5mm – 1480mm (Conventional width: 1380mm)

  • Roll Length: 100 yards / roll

To achieve optimal peel strength and bonding flatness, Tunsing Laboratory recommends the following baseline pressing conditions:

• First Lamination: Mold Temp 150°C – 170°C, Time 5 – 15 seconds, Pressure 0.3 – 0.6 MPa.

• Second Lamination: Mold Temp 160°C – 180°C, Time 8 – 25 seconds, Pressure 0.3 – 0.6 MPa.

Exhibiting exceptional adhesion to textiles, TPU, and PVC materials, DS823 is widely applied in:

• Seamless Apparel & Embroidery: Seamless bonding for apparel, embroidery badge backing, etc.

• Footwear, Hats & Handbags: Upper material lamination for athletic footwear, high-end handbag, and luggage bonding.

• Outdoor & Sporting Goods: Sports equipment component assembly, toys, and various functional fabric laminations.

Shenzhen Tunsing Plastic Products Co., Ltd. focuses on the R&D and manufacturing of hot melt adhesive films for seamless bonding. Leveraging professional testing equipment and continuous technical innovation, Tunsing provides global customers with stable, efficient, and sustainable adhesive solutions.