Flexibility Softness High Melt Complete Guide to Selecting Between Tunsing DS6191 and DS6192 Hot Melt Adhesive film

SHENZHEN —— As modern industrial manufacturing demands increasingly stringent, refined, and customized processing, selecting the most compatible bonding material for specific substrates and processes has become a core challenge for companies looking to optimize capacity and product quality. Shenzhen Tunsing Plastic Products Co., Ltd., a leading global manufacturer of hot melt adhesive materials, officially released a technical parameter comparison and industrial selection guide for its star polyurethane (TPU) hot melt adhesive films: DS6191 and DS6192.

Both products are developed from premium, eco-friendly polyurethane materials and are supported by high-quality glassine release paper. They offer excellent rheological properties that allow them to be repeatedly heated and plasticized. However, precision thermodynamic and rheological testing by the Tunsing Laboratory reveals distinct performance priorities in their core technical parameters, giving industries highly precise options for custom applications.

To help engineers and procurement teams make direct evaluations, the core technical indicators of both products are compared below:

While both hot melt adhesive films share key features like low operating temperatures, fast curing times, easy processing, and excellent cold resistance, Tunsing's application experts offer precise selection recommendations based on their micro-physical differences:

• Technical Analysis: The Shore A hardness of DS6191 is 92 ± 3, which is lower than the 97 ± 3 of DS6192. A lower hardness means the adhesive layer remains softer with better flex-elasticity after curing.

• Selection Scenario: If you are developing high-end fashion apparel, intimate clothing, or delicate embroidery that requires an ultra-soft hand-feel and skin-friendly elasticity, or need high-flexibility outdoor sports equipment materials, DS6191 is your preferred solution.

• Technical Analysis: The melt flow index (MFI) of DS6192 reaches 10 ± 4 cm³/10min, which is higher than DS6191's 7 ± 3 cm³/10min. This means that once the activation temperature is reached, DS6192 melts and flows faster, allowing it to rapidly penetrate and level out across porous or irregular surfaces. Additionally, its recommended mold temperature for the first lamination goes as low as 70°C - 120°C (compared to DS6191's 80°C - 120°C), offering better thermal protection for heat-sensitive substrates.

• Selection Scenario: Beyond traditional textiles, TPU, PVC, PC, and ABS, if your manufacturing lines encompass diverse assembly categories like footwear and toys, DS6192 will offer broader versatility and better adaptation to varying mechanical conditions.

• DS6191 Specialty: Technical data shows that DS6191 undergoes rheological optimization to deliver exceptionally high peel strength when laminating fiberglass sheets with various plastics (TPU/PVC/PC/ABS) and textiles. At a lamination condition of around 120°C, it establishes outstandingly stable bonding performance on rigid sheets.

• Selection Scenario: If your application involves cross-material bonding between rigid fiberglass sheets and soft materials—often found in modern luggage or protective gear—it is highly recommended to prioritize testing DS6191.

Tunsing's technical experts note that the final bonding quality of a hot melt adhesive film is determined by three combined factors: temperature, pressure, and time. Because production machinery, material weights, and thicknesses vary, the following basic parameters can serve as an initial benchmark for sampling:

• DS6191 Processing Window:

  • First Lamination: Mold temperature 80°C - 120°C, time 5 - 15 seconds, pressure 0.3 - 0.6 mpa.

  • Second Lamination: Mold temperature 80°C - 130°C, time 8 - 25 seconds, pressure 0.3 - 0.6 mpa.

• DS6192 Processing Window:

  • First Lamination: Mold temperature 70°C - 120°C, time 5 - 15 seconds, pressure 0.3 - 0.6 mpa.

  • Second Lamination: Mold temperature 80°C - 140°C, time 8 - 25 seconds, pressure 0.3 - 0.6 mpa.

To ensure a flawless fit, manufacturers are encouraged to carry out preliminary sampling and calibration for their specific application scenarios to establish ideal, customized mass-production parameters.

About Shenzhen Tunsing Plastic Products Co., Ltd. Shenzhen Tunsing Plastic Products Co., Ltd. is a high-tech enterprise dedicated to providing global clients with eco-friendly, efficient, and innovative hot melt bonding solutions. If you need a customized material selection report for your specific substrates or wish to apply for free sampling, please contact the Tunsing technical team