Shenzhen Tunsing Releases High Cold-Resistant TPU Hot Melt Adhesive Film DS9164

Empowering Multi-Sector Lamination with Ultra-Low Temperature Performance and High Bonding Strength

Release Date: March 5, 2025

Source: Shenzhen Tunsing Plastic Products Co., Ltd.

Category: Materials Science / Industrial Bonding & Composite Materials

Executive Summary

SHENZHEN, China — Shenzhen Tunsing Plastic Products Co., Ltd. (Tunsing), a well-known enterprise in industrial bonding materials, today officially announced the release of its latest-generation thermoplastic polyurethane (TPU) hot melt adhesive film, DS9164. Engineered for demanding composite materials lamination, the film comes supported by glassine release paper and delivers superior cold resistance (Glass Transition Temperature as low as $-45.4^\circ\text{C}$), low-overflow rheological properties, and exceptional processing adaptability. The launch of DS9164 offers a green, eco-friendly bonding solution featuring high peel strength and environmental durability for industries including apparel, embroidery, footwear, luggage, handbags, toys, headwear, and sporting goods.

1. Technical Specifications & Physical Property Analysis

DS9164 is a thermoplastic hot-melt film that supports repeated heat-softening bonding processes. Regarding substrate compatibility, the product demonstrates outstanding adhesion to textiles, polyurethane (TPU), polyvinyl chloride (PVC), polycarbonate (PC), and acrylonitrile butadiene styrene (ABS).

Key Properties & Parameters

• Material Composition: Polyurethane (TPU Elastomer)

• Appearance: Foggy Translucent with Glassine Release Paper

• Specific Gravity / Density: $1.20 \pm 0.02\text{ g/cm}^3$

• Hardness: $96 \pm 2\text{ Shore A}$ (High modulus & mechanical strength)

• Melt Flow Rate (MFR): $3 \pm 2\text{ cm}^3/10\text{min}$ (ASTM D1238-04, low flow value prevents overflow)

• Melting Temp Range: $35^\circ\text{C}\text{--}55^\circ\text{C}$ (ISO 11357; DSC Peak: $48.2^\circ\text{C}$)

• Activation Temp Range: $90^\circ\text{C}\text{--}150^\circ\text{C}$ (Tunsing Laboratory Standard)

• Glass Transition Temp (Tg): $-45 \pm 8^\circ\text{C}$ (GB/T 19466.2-2004; DSC Value: $-45.4^\circ\text{C}$)

• Thickness Range: $0.05\text{mm}$, $0.08\text{mm}$, $0.10\text{mm}$ (Customizable: $0.03\text{--}0.15\text{mm}$)

• Width & Packaging: Standard width $1380\text{mm}$ (Customizable: $5\text{--}1480\text{mm}$); $100\text{ yards/roll}$

Thermal & Rheological Diagnostics

• Differential Scanning Calorimetry (DSC): Tested via NETZSCH DSC 214 ($10^\circ\text{C/min}$ under Nitrogen atmosphere, $-80^\circ\text{C}$ to $200^\circ\text{C}$). The film exhibits a distinct glass transition endotherm at $-45.4^\circ\text{C}$, providing exceptional embrittlement resistance under extreme cold environments. A clear melting endothermic peak appears at $48.2^\circ\text{C}$.

• Rotational Rheology Analysis: Dynamic parallel plate mode testing using an Anton Paar Rheometer ($2.5^\circ\text{C/min}$ heating rate) shows a crossover of storage modulus ($G'$) and loss modulus ($G''$) at $97.1^\circ\text{C}$. This crossover marks the smooth transition from viscoelastic solid to fluid state, establishing a precise process window for complete substrate wetting and interface penetration.

2. Application Scenarios & Industry Solutions

Thanks to its robust bonding power to polar polymers (PVC, PC, ABS) and textiles, DS9164 serves a broad spectrum of industrial applications:

1. Apparel & Embroidery: Ideal for high-end seamless garment lamination, seamless pockets, plackets, and embroidery badge backing, delivering a smooth finish without glue bleed.

2. Footwear & Outdoor Gear: Engineered to withstand extreme cold outdoor conditions, ensuring seamless shoe uppers and protective gear remain firmly bonded without delamination under repeated flexing.

3. Luggage & Handbags: Provides high-strength bonding between rigid plastic inserts (PVC, PC, ABS) and fabric outer layers, resisting impact and aging.

4. Headwear, Toys & Sports Equipment: Suitable for hot-press lamination on complex curved surfaces, enabling automated assembly lines.

3. Recommended Lamination Process & Guidelines

To achieve maximum peel strength, Tunsing recommends utilizing a Two-step Lamination Process:

1. Step 1: Pre-bonding (Initial Attachment)

   • Mold Temperature: $130^\circ\text{C}\text{--}180^\circ\text{C}$

   • Press Time: $5\text{--}15\text{ seconds}$

   • Pressure: $0.3\text{--}0.6\text{ MPa}$

   • Procedure: Place the DS9164 film with release paper onto the first substrate. Apply heat and pressure, allow to cool, then peel off the glassine release paper.

2. Step 2: Second Lamination (Final Assembly)

   • Mold Temperature: $140^\circ\text{C}\text{--}180^\circ\text{C}$

   • Press Time: $8\text{--}25\text{ seconds}$

   • Pressure: $0.3\text{--}0.6\text{ MPa}$

   • Procedure: Align the pre-coated substrate with the second material, perform the second pressing cycle, and cool to complete curing.

💡 Process Notes:

1. Lamination temperature, pressure, and duration directly determine the final bond strength. The actual bond line temperature must approach machine settings, pressure should remain uniform, and pressing dies/rollers must be flat.

2. Parameters above are based on Tunsing laboratory standards. Pre-production trial runs are recommended to establish optimal settings for specific equipment and substrate combinations.