Ultimate Innovation in Tactility and Elasticity: Shenzhen Tunsing Launches DS3412 Ultra-Soft and High-Elasticity Polyurethane Hot Melt Adhesive Film

Shenzhen, China — With the booming development of seamless underwear, high-end sportswear, and high-elasticity functional fabrics, garment manufacturing demands exceptionally high standards for the softness and elasticity of bonding adhesive films. Shenzhen Tunsing Plastic Products Co., Ltd. has officially launched its newly developed DS3412 Polyurethane Hot Melt Adhesive Film. Specifically designed for heat-press bonding of highly elastic and soft fabrics such as Lycra, spandex, and nylon, DS3412 is the ideal choice for seamless composite bonding in next-to-skin garments like one-piece underwear and seamless panties.

DS3412 Core Selling Points

1. Ultra-Soft Tactile Feel for Ultimate Comfort

   DS3412 features an ultra-low hardness of 52 ± 2 Shore A (significantly lower than standard adhesive films), delivering an exceptional hand feel and zero foreign object sensation after bonding. While maintaining robust adhesive strength, it endows fabrics with a skin-friendly, soft experience comparable to a second skin.

2. Superior Elastic Recovery, Resistant to Stretch Deformation

   As a high-elasticity thermoplastic polyurethane (PU) film, DS3412 possesses a very high elastic recovery rate. When stretched simultaneously with high-elasticity fabrics like Lycra and spandex, it snaps back rapidly, effectively preventing bond breakage or delamination caused by frequent stretching.

3. Low Melting Point with High Flow for Perfect Penetration and Encapsulation

   With a Melt Flow Index (MFI) of 8 ± 3 cm³/10min (ASTM D1238-04), at an activation temperature of 155–185°C and a fluid transition temperature of approximately 129.1°C, the molten adhesive flows appropriately to firmly anchor high-elastic fabric fibers, delivering stable and reliable washing and stretch durability.

4. Broad Thermal Tolerance and Super Low-Temperature Cold Resistance

   According to DSC analysis testing, the glass transition temperature (Tg) of DS3412 is as low as -41.9°C (standard range around -41.9°C, with a melting peak of approx. 130.6°C). Even in cold environments, it maintains outstanding flexibility and resilience, resisting hardening or brittleness.

Model Selection Guide: DS3412 vs. DS823

To help customers precisely match their process requirements, Tunsing Laboratory provides a multi-dimensional parameter and application comparison between DS3412 and DS823:

💡 Customer Selection Recommendations:

• Choose DS3412 if you need:

  • Skin-friendly closeness and high-elastic stretch: Such as seamless underwear, bonded bras, high-elasticity yoga wear, and seamless panties. DS3412’s hardness of only 52 Shore A stretches and recovers synchronously with high-elastic fabrics without causing tightness or stiff marks.

  • Ultra-thin and ultra-soft requirements: Available in an 0.025mm ultra-thin specification for "zero-sensation bonding."

• Choose DS823 if you need:

  • Anti-seepage and high heat resistance: Ideal for knitting/breathable fabric lamination; an MFI of only 5 cm³/10min provides exceptional control against glue strike-through.

  • High flatness and structural support: Such as seamless jacket pockets, upper laminations, and handbag/luggage composites, where 81 Shore A offers superior structural shaping and strength.

  • Low-temperature heat-press activation: Activation temperatures range from 115–140°C, making it suitable for regular textile fabrics with higher heat sensitivity.

About Tunsing

Shenzhen Tunsing Plastic Products Co., Ltd. focuses on the research, development, and production of high-quality thermoplastic hot melt adhesive films. Equipped with a professional bonding analysis laboratory, Tunsing can tailor-make optimal bonding solutions based on customers' specific fabric characteristics and pressing equipment.