High frequency welding filler for shoes – TPU film 0.05–2.0mm, low melting point grade, HF-compatible. Peel ≥8N/mm, REACH/RoHS. For uppers, insoles, liquid chambers. Request sample.
Products Description
Introducing Our High frequency welding filler for shoes refers to thermoplastic polyurethane (TPU) films used as the bonding medium or structural reinforcement layer in radio-frequency (RF) welding of footwear components. These films are engineered with a low melting point and high dielectric loss factor to enable rapid molecular fusion under high-frequency electromagnetic fields, forming permanent bonds between textiles, leather, foam, and other TPU substrates without adhesives. Solamni supplies HF-weldable TPU films in thicknesses from 0.05mm to 2.0mm, roll widths of 1.37m or 1.4m, with custom color options, REACH/RoHS compliance, and MOQ from 500 meters.
Technical Specifications Matrix
| Property | Specification | Test Standard |
|---|---|---|
| Material Type | Thermoplastic Polyurethane (TPU) – Polyester or Polyether base | FTIR |
| Thickness Range | 0.05mm – 2.0mm ±3% tolerance | Micrometer / ISO 4593 |
| Roll Width | 1.37m (54″) / 1.4m (55″) | In-house |
| Shore Hardness | 70A – 95A (grade-dependent) | ASTM D2240 |
| Melting Point | 80°C – 150°C (low melting point grade available) | DSC / ISO 11357 |
| Dielectric Loss Factor | Optimized for 27.12 MHz HF welding | In-house / ASTM D150 |
| Tensile Strength | 20 – 60 MPa (grade-dependent) | ASTM D412 / ISO 527 |
| Elongation at Break | 300% – 800% (grade-dependent) | ASTM D412 / ISO 527 |
| Peel Strength (after welding) | ≥8 N/mm (fabric-to-fabric) | ISO 2411 |
| Hydrolysis Resistance | ≥72 hours accelerated (70°C/95% RH) | ISO 1419 |
| Flex Fatigue | ≥50,000 cycles (no delamination) | Bally flexometer / SATRA TM55 |
| Weld Cycle Time | 0.5 – 3 seconds per weld | In-house |
| Weld Strength | 95–100% of base material strength | In-house tensile |
| VOC Emission | Zero (solvent-free production) | ISO 16000 |
| Compliance | REACH (SVHC <0.1%), RoHS (phthalates <0.1%) | EU 1907/2006 / EU 2015/863 |
| MOQ | 500 meters per thickness/color | - |
Technical Specifications Matrix
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Solamni manufactures HF-weldable TPU films via precision calender extrusion lines with closed-loop thickness control. Dielectric & HF Compatibility Screening: Weld Strength Validation: Flex Fatigue & Durability: Hydrolysis & Environmental: Factory Traceability: |
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Quality Control & Testing Standards
HF-weldable TPU films are supplied to footwear OEMs as the bonding medium or structural reinforcement layer in high-frequency welding processes.
Shoe Upper Construction (Primary)
Seamless upper lamination: TPU film as the bonding layer between mesh, knit, leather, and TPU support sheets – enables stitch-free, adhesive-free construction.
Upper overlays & reinforcements: TPU film welded onto high-wear zones (toe caps, heel counters, eyelet surrounds) for structural reinforcement and abrasion resistance.
Logo & decorative applications: HF-welded TPU labels, 3D logos, and embossed branding – film acts as both adhesive and decorative medium.
Insole & Footbed Manufacturing
Multi-layer insole lamination: Bonding EVA foam, fabric top sheets, and cushioning layers via HF welding.
Liquid-filled cushioning chambers: TPU films (0.3–0.7mm) welded to form sealed cavities for glycerin-based fluid cushioning. HF welding ensures hermetic seals without adhesive contamination.
Sole & Midsole Assembly
Outsole-to-upper welding: TPU film as the interface layer between TPU outsoles and textile uppers – eliminates solvent-based adhesives.
Mono-material shoe construction: Entirely TPU-based footwear where all components (knitted upper, 3D-printed eyelets, sole) are HF-welded into a single recyclable structure.
Other Applications
Protective footwear: Welded TPU film for waterproof bootie construction and seam sealing.
Sports equipment: Football panels, protective gear, and luggage components.
Product Parameter (specification)
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Shows Products
Looking For High-quality Related Shoe Materials And Industrial Materials. We Are A Reliable B2b Supplier, Offering Personalized Customization Services, Competitive Prices And Fast Delivery Services.
Why Choose Us
We specialize in providing material high-quality for industrial applications. Our focus on B2B sourcing ensures that you get the best prices for large orders, with the flexibility to customize the fabric to meet your specific needs. Whether you require bulk quantities for production or specialized orders, we can help you achieve your goals with fast delivery and exceptional customer support.
Bulk Sourcing: Competitive pricing for large-scale orders.
Customization: Flexible solutions tailored to your industry needs.
Global Shipping: Fast, reliable delivery to international markets.
High-Quality Standards: Rigorous testing and quality assurance to ensure performance and durability.
Frequently Asked Questions (FAQ)
What thickness of TPU film is recommended for HF welding of shoe uppers, and does thickness affect weld cycle time?
0.05–0.20mm for lightweight mesh/knit uppers; 0.20–0.50mm for leather and heavy-duty applications. Thicker films require longer weld cycles – typically 1–3 seconds for 0.5mm vs. 0.5–1 second for 0.10mm at 27.12 MHz. We recommend trials to optimize your specific substrate and equipment.
Can your HF-weldable TPU film bond dissimilar materials like EVA foam to polyester mesh?
Yes. TPU films function as a universal bonding medium between polar substrates. EVA with 12–18% VA content is HF-compatible. Peel strength ≥8 N/mm validated for EVA-to-mesh laminations. Pre-production weld trials using your material stack-up are available.
What is the MOQ and lead time for a custom-thickness HF-weldable TPU film for shoe production?
Standard MOQ: 500 meters per thickness/color. Custom thickness or color matching (Pantone): 7–10 business days. Bulk production: 12–18 business days after sample approval. Sample rolls (50 meters) available for HF weld process validation.
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