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Grey insole board with yellow EVA is a composite athletic footbed material consisting of a grey nonwoven polyester-cellulose fiber board base laminated to a high-resilience yellow EVA foam top layer, engineered for running, training, basketball, and performance athletic shoe insoles requiring energy return, impact cushioning, and structural stability. Solamni manufactures grey insole board with yellow EVA in total thicknesses from 1.5 mm to 4.0 mm, with the fiber board base providing stiffness indices of 40–90 N and the yellow high-rebound EVA layer offering energy return above 55% and Asker C 35–50 cushioning, supplied in 1.0 m × 1.5 m sheets. The facility supports custom EVA rebound grade, thickness ratio, yellow shade, and backing weight, with batch production from 500 kg and REACH/RoHS compliance for global athletic footwear brands.
Technical Specifications Matrix
| Parameter | Specification |
|---|---|
| Base Material Formulation | Grey nonwoven polyester-cellulose fiber board (base layer) + high-resilience yellow EVA foam (cushion top layer); latex / resin impregnated board |
| Standard Sheet Size | 1.0 m × 1.5 m; custom sizes and continuous roll form available |
| Thickness Options | Total: 1.5 mm – 4.0 mm; board layer: 0.8 – 2.0 mm; EVA layer: 0.7 – 2.0 mm (±0.1 mm total) |
| Stiffness Index | 40 N – 90 N (cantilever deflection test, 50 mm × 200 mm specimen, board-dominant) |
| Moisture Absorption & Desorption Rate | Board layer: ≤ 8% absorption (24 h); EVA layer: ≤ 2%; desorption to equilibrium within 4 h |
| Flex Cycle Threshold | ≥ 50,000 cycles at 90° bend, no delamination between board and EVA, no fiber breakage |
| Stitch-Tear Strength | ≥ 70 N (single stitch through full composite thickness, ASTM D2261 modified) |
| EVA Layer Hardness (Asker C) | 35 – 50 (athletic / high-rebound grade, customizable) |
| EVA Layer Density | 0.15 – 0.28 g/cm³ |
| Energy Return (Resilience) | ≥ 55% (mechanical drop test, 8.5 kg, 50 mm; premium high-rebound grade ≥ 60%) |
| Compression Set (EVA Layer) | ≤ 20% (50% compression, 50°C, 6 h, ASTM D395 - high-resilience grade) |
| Interlayer Bond Peel Strength | ≥ 4 N/25 mm (board to EVA, 180° peel) |
| Impact Attenuation | ≥ 30% peak force reduction (mechanical drop test, 8.5 kg mass, 50 mm fall) |
| Yellow EVA Color Fastness to Light | ≥ 4 grade (ISO 105-B02, 40 h - critical for visible yellow EVA) |
| Grammage (Total Composite) | 600 g/m² – 1,500 g/m² (thickness-dependent) |
| Color | Grey board + yellow EVA (standard; custom Pantone shades available) |
| Surface Finish | Yellow EVA smooth / textured top; grey fiber board smooth bottom; optional fabric lamination on EVA side |
| Environmental Compliance | REACH SVHC, RoHS 2.0 |
Solamni's grey insole board with yellow EVA QC protocol is structured for athletic footwear applications, emphasizing energy return consistency, yellow EVA color fastness under UV and perspiration, compression durability, and interlayer bond integrity under repeated athletic loading.
The grey nonwoven fiber board is produced by carding, cross-lapping, needle-punching, and latex/resin saturation with grey pigment, then dried and calendared to target thickness (0.8–2.0 mm). Yellow high-resilience EVA foam is compounded with high VA content (18–28%), blowing agent, and crosslinking agent, then compression-molded or extruded to target thickness (0.7–2.0 mm) and hardness (Asker C 35–50). The yellow pigment is added during EVA compounding to ensure through-color. The two layers are laminated using a water-based PU or hot-melt adhesive applied at 30–60 g/m² via roller coater, then pressed in a continuous belt laminator at 80–120°C under 2–4 bar. The yellow EVA color is verified by inline spectrophotometer at the laminator exit, and total thickness is monitored by inline beta gauge.
- Total thickness - micrometer, 10 points per sheet, ±0.1 mm; individual layer thickness by cross-section microscopy.
- Stiffness index - cantilever deflection tester, 50 mm × 200 mm specimen, force at 45° deflection.
- Moisture absorption - 24 h water immersion, weight gain; desorption timed to equilibrium.
- Flex resistance - repeated 90° bend tester, 50,000 cycles, inspection for delamination, fiber breakage, and EVA cracking.
- Stitch-tear strength - universal testing machine, single stitch through full composite, 300 mm/min, ASTM D2261 modified.
- Interlayer bond peel strength - 180° peel, 25 mm strip, 300 mm/min.
- EVA hardness - Asker C durometer, 5 readings per sheet, ASTM D2240.
- EVA density - water displacement, ASTM D792.
- Energy return (resilience) - mechanical drop rig, 8.5 kg mass from 50 mm, rebound height measured and expressed as percentage of drop height; 5 specimens per batch.
- Compression set - EVA layer, 50% compression, 50°C, 6 h, ASTM D395.
- Impact attenuation - mechanical drop rig, 8.5 kg from 50 mm, peak force compared to rigid control.
- Yellow EVA color fastness to light - xenon arc lamp, 40 h, ISO 105-B02, gray scale rating; critical for yellow EVA which is prone to photo-oxidative fading.
- Yellow EVA color fastness to perspiration - acid and alkaline artificial perspiration, ISO 105-E04, staining and color change rated ≥ 4.
- Yellow color consistency - spectrophotometer ΔE ≤ 1.5 against approved yellow master, measured at sheet beginning, middle, and end.
- Grammage - cut 100 mm × 100 mm specimens, 5 per sheet, weighed to ±0.1 g.
Each fiber board lot verified by FTIR for polyester/cellulose ratio and formaldehyde below 75 ppm (ISO 14184-1). EVA foam verified by melt flow index (190°C / 2.16 kg), VA content by FTIR, and blowing agent residue. Yellow pigment verified for heavy metal content (lead, cadmium, chromium) below applicable limits. Finished composite screened by GC-MS for REACH SVHC and ICP-OES for RoHS restricted elements. Third-party SGS or Intertek reports on request.
The plant operates 2 nonwoven carding and cross-lapping lines, 1 needle-punch line, 2 saturation impregnation lines, 3 EVA compression molding presses with high-resilience compounding capability, 2 continuous belt laminators, 4 sheet-cutting and slitting machines, inline beta thickness gauges, an inline spectrophotometer for yellow color monitoring, a mechanical energy return / impact drop tester, a compression set oven, and a xenon arc light fastness chamber. This setup supports energy return variation below 3% across batches, yellow color ΔE ≤ 1.5, and interlayer bond consistency across full 100 m rolls.
Industrial Application Scenarios
Running shoe insoles. Medium stiffness grey insole board with yellow high-rebound EVA (total 2.0–3.0 mm, board 1.0–1.5 mm, stiffness 50–70 N, EVA Asker C 35–45, energy return ≥ 55%) is used for running shoe insoles, providing impact attenuation (≥ 30%) during heel strike and energy return during toe-off. The yellow EVA layer is often visible through mesh top covers or cutout designs, adding a performance aesthetic.
Training and cross-training shoe insoles. Medium-high stiffness composite (stiffness 60–80 N, total 2.5–3.5 mm, EVA Asker C 40–50) is used for cross-training, gym, and fitness footwear, requiring lateral stability and cushioning for multi-directional movements. The higher EVA hardness provides support during side-to-side and lifting movements.
Basketball shoe insoles. High stiffness, high-rebound composite (stiffness 70–90 N, total 3.0–4.0 mm, EVA Asker C 40–50, energy return ≥ 55%) is used for basketball shoe insoles, providing impact cushioning for jumps and landings, energy return for sprinting, and structural stability for quick direction changes. The thicker construction supports the higher body mass and impact forces of basketball.
Court sports insoles (tennis, badminton, volleyball). Medium stiffness composite (stiffness 50–75 N, total 2.0–3.0 mm, EVA Asker C 38–48) is used for court sports footwear, requiring a balance of cushioning, lateral support, and quick response. The low moisture absorption of both layers prevents insole weight gain from foot perspiration during long matches.
High-performance aftermarket athletic insoles. Solamni supplies grey insole board with yellow EVA to aftermarket athletic insole brands, running specialty retailers, and sports orthotic manufacturers. The composite is die-cut to standard sizes (EU 36–48, US men's 4–14, women's 5–12), and the yellow EVA surface can be textured or covered with a moisture-wicking top fabric for retail packaging. The visible yellow EVA layer is a key marketing feature for "high-rebound" or "energy" branded insoles.
Sports orthotic insoles. Medium-high stiffness grades (60–90 N) serve as base plates for custom sports orthotics, where the rigid grey fiber board provides arch support and the yellow EVA adds cushioning. The composite can be heat-molded or ground to custom contours at orthotic laboratories, and the yellow EVA layer can be selectively removed (skived) in high-pressure areas for customized pressure relief.
Visible yellow EVA design insoles. For athletic footwear with cutout, transparent, or mesh top-cover designs where the insole layer is visible, the yellow EVA provides a bold performance aesthetic. The yellow color is formulated with light fastness ≥ grade 4 (40 h xenon arc) to resist fading from UV exposure through mesh or transparent uppers.
FAQ
Q: How is yellow EVA color fastness controlled, and does it fade or discolor from UV exposure, sweat, or washing?
Q: What is the difference between high-rebound yellow EVA and standard EVA in energy return, compression set, and cost?
Q: Can the yellow EVA layer be made visible in cutout or transparent-top-cover insole designs, and what is the minimum order?
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Hot Tags: grey insole board with yellow eva, China grey insole board with yellow eva manufacturers, suppliers, factory
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
Solamni 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
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