China One-Stop Shoe Material Manufacturer
Looking for high-quality related shoe materials and industrial materials. We are a reliable Shoe Material supplier, offering personalized customization services, competitive prices and fast delivery services.
Introduce our products
Technical Specifications Matrix
| Parameter | Specification |
|---|---|
| Base Polymer | EVA (vinyl acetate 18–40%), polyamide (PA), polyester (PES), TPU, or polyolefin (PO) |
| Physical Form | Pellets (3–5 mm), glue sticks (11 mm / 43 mm dia.), or film (0.05 – 0.30 mm) |
| Application Temperature | 110°C – 160°C (grade-dependent) |
| Melt Viscosity @ Application Temp | 1,000 – 15,000 mPa·s (Brookfield, spindle 27) |
| Open Time | 5 s – 60 s (adjustable per formulation) |
| Set Time | 3 s – 30 s |
| Peel Strength (fully cured) | ≥ 6 N/25 mm (leather to EVA foam); ≥ 8 N/25 mm (PU to rubber) |
| Lap Shear Strength (cured) | ≥ 2.5 MPa (ASTM D1002) |
| Softening Point (Ring & Ball) | 70°C – 120°C (ASTM E28) |
| Continuous Heat Resistance | 60°C – 100°C (grade-dependent) |
| Cold Flex Temperature | −10°C – −30°C (no cracking after mandrel bend) |
| Solid Content | 100% (solvent-free, zero water) |
| Color | Natural / amber / white / black (custom tint available) |
| Environmental Compliance | REACH SVHC, RoHS 2.0, low-VOC (< 1 g/L) |
Quality Control & Testing Standards
Asterism's
hot melt adhesive QC protocol covers raw material batch verification, melt rheology, cured-bond mechanical performance, and thermal stability under footwear service conditions.
Production process control. Raw polymers, tackifying resins, waxes, and antioxidants are weighed by loss-in-weight feeders to ±0.5% of formulation target. The twin-screw extruder melts and compounds the blend at 120–180°C with zone temperature controlled within ±3°C. Melt viscosity is monitored inline by a capillary rheometer, and any batch deviating more than 10% from the specification band is diverted. Pelletized product is cooled on a steel belt, screened for particle size (3–5 mm), and packaged in moisture-barrier bags with desiccant.
Physical and chemical testing (per batch).
- Melt viscosity - Brookfield viscometer, spindle 27, at application temperature ±1°C, ASTM D3236.
- Softening point - Ring & Ball apparatus, ASTM E28.
- Open time and set time - automated hot-melt applicator on standard substrate, timed from bead deposition to loss of tack / to handling strength.
- Peel strength - 180° peel, 25 mm strip, 300 mm/min, 7-day cure at 23°C / 50% RH, on specified substrate pairs.
- Lap shear strength - 25.4 mm × 12.7 mm overlap, 1.5 kN/min crosshead, ASTM D1002.
- Heat resistance - bonded specimen under 0.1 MPa static load, ramp 5°C/min, record failure temperature (SAFT).
- Cold flexibility - bonded specimen bent over 25 mm mandrel at specified low temperature, no cracking or delamination.
- Thermal stability - adhesive held at application temperature + 20°C for 72 h, viscosity change ≤ 15%, no charring or skinning.
- Color - Gardner color scale or spectrophotometer ΔE ≤ 1.0 vs. standard.
- Moisture content - Karl Fischer titration, ≤ 0.1%.
Regulatory testing. Each formulation is screened by GC-MS for REACH SVHC substances and by ICP-OES for RoHS restricted elements. VOC content is measured by EPA Method 24 (or equivalent), with all grades below 1 g/L. Food-contact and skin-contact grades are additionally tested for extractables per EU 10/2011 and ISO 10993-5 (cytotoxicity) where required. Third-party SGS or Intertek reports are issued on request.
Equipment backing production stability. The plant operates 4 twin-screw extrusion lines (capacity 300–800 kg/h each), 2 continuous steel-belt pastillators, 1 glue-stick extrusion line, 1 hot-melt film cast line, inline capillary rheometers, and a fully equipped adhesive testing lab. This setup supports batch-to-batch viscosity variation below 8% and consistent open-time performance across production runs.
Industrial Application Scenarios
Upper-to-sole cementing. EVA-based hot melts with 25–40% vinyl acetate content and open times of 20–40 seconds are used for bonding leather, synthetic leather, and mesh uppers to EVA, PU, or rubber midsoles and outsoles. Application via roller coater or slot-die nozzle at 130–150°C, followed by 4–6 bar press for 15–20 seconds. Peel strength above 6 N/25 mm is standard after full cure.
Toe puff and heel counter bonding. Fast-setting EVA or polyamide hot melts (open time 5–15 seconds, set time 3–10 seconds) are applied to PP or thermoplastic toe puffs and heel counters before insertion into the upper. The short open time matches automated toe-puff molding machines, and the bond withstands the 90–110°C molding cycle without bleed-through.
Insole and midsole lamination. Polyester (PES) or TPU-based hot melt films (0.05–0.15 mm) are used for laminating EVA or PU foam insoles to fabric top covers, and for bonding midsole foam layers. Heat-press lamination at 110–130°C, 3–5 bar, 10–15 seconds. The film form provides uniform adhesive distribution and zero squeeze-out.
Lining and upper assembly. Low-viscosity EVA hot melts (1,000–3,000 mPa·s) are used for bonding lining fabric to upper quarters, box toe construction, and foxing tape attachment. Spray or bead application via automated shoe assembly robots ensures minimal adhesive weight (1.5–3.0 g per pair) and clean bond lines.
Sports shoe specialized bonding. TPU-based hot melts are specified for bonding TPU structural films, carbon-fiber plates, and high-performance mesh in running and football footwear. TPU hot melts offer superior flexibility, hydrolysis resistance, and bond strength to polar substrates compared to EVA grades.
Cold-climate and heat-resistant service. Low-temperature-flex grades (−30°C) are used for winter boots and outdoor footwear. High-heat-resistance grades (continuous 90–100°C) are specified for footwear sold in tropical markets and for shoes stored in vehicle interiors where cabin temperatures can exceed 70°C.
FAQ
Q: How do open time and set time affect selection for an automated shoe production line?
Q: Which hot melt base polymer is best for bonding specific shoe material combinations?
Q: What is the minimum order and lead time for a custom-formulated hot melt adhesive?
Products shows
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why choose us
why choose our products
We specialize in providing premium-grade materials for industrial applications. Our focus on wholesale sourcing ensures you receive competitive pricing on large orders, alongside flexible fabric customization to meet your exact specifications. Whether you need high-volume production runs or specialized orders, we ensure your success with fast delivery and exceptional 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.
Elite Partners
Direct collaboration with DHL, FedEx, UPS, TNT, and EMS to ensure maximum shipping efficiency.
Custom Logistics
Flexible options covering air freight, sea cargo, and express door-to-door delivery.
Secure Transit
Professional packaging and full-course tracking for peace of mind.
Our Advantage
Sourced for Excellence: We meticulously select only premium-grade raw materials.
Expert Craftsmanship: Our team comprises experienced technicians operating advanced machinery.
Proactive QC: We implement rigorous in-line inspections throughout every stage of production.
Zero-Risk Standards: A dedicated QC team performs final double-inspections, fully compliant with your chosen AQL standards before packaging.
Unwavering Consistency: We maintain a strict, non-negotiable commitment to top-tier quality.
fAQ
A1: Approximately 25-35 days after all specifications and order details are confirmed.
A2: We typically require a 30% deposit in advance with the remaining 70% balance due before shipment. Alternatively, we accept a 50/50 split depending on the final order quantity.
A3: We accept T/T (Telegraphic Transfer), PayPal, and Western Union.
A4: Free samples are available! Custom sample preparation takes about 3-5 days once all details are confirmed
ASTERISM Import And Export Co., Ltd.
Let's build a profitable future together. We sincerely welcome global clients for long-term strategic cooperation. Contact us today-our team is ready to respond to your inquiries swiftly.
ace01@eurus-cn.com +8613459576329
Whatsapp+8613459576329 
