Lightweight High Density IXPP Foam for Shoe Insole Applications
EKKOFLEX's IXPP (Irradiation Cross-Linked Polypropylene) foam is a lightweight yet high density waterproof foam material specially selected for shoe insole manufacturing. Produced through melt mixing and extrusion molding, green ion radiation cross-linking, and continuous high-temperature foaming, the material forms an independent closed-cell structure with a closed-cell rate of over 98%.
High density IXPP grades deliver firm, long-lasting arch and heel support while remaining lightweight for all-day wearing comfort. The waterproof closed cell structure keeps feet dry from moisture and sweat, while excellent resilience and shock absorption reduce foot fatigue - making IXPP foam an ideal insole material for sports shoes, casual footwear, work boots, and orthopedic insoles.

Key Features

• Lightweight & High Density - High density grades (100-200 kg/m³) provide firm support with low weight, ideal for supportive and durable shoe insoles.
• Waterproof Closed Cell Structure - Closed-cell rate over 98% with water absorption as low as ≤2%, keeping feet dry and preventing odor caused by moisture retention.
• Superior Shock Absorption & Rebound - Excellent cushioning and resilience reduce impact on heels and joints, with lasting rebound that resists flattening.
• Low Odor & Skin Friendly - Environmentally friendly and harmless with minimal VOC emissions and low odor, safe for prolonged skin contact inside footwear.
• Thermal Comfort - Low thermal conductivity provides insulation, keeping feet comfortable in both cold and warm conditions.
• Easy Processing - Can be die-cut, thermoformed, and skived into precise insole shapes, arch supports, and heel pads.
• Certified Quality - ISO 9001:2015, RoHS, and REACH certified, meeting international compliance standards.

Product Photos

EKKOFLEX IXPP foam product photos: closed cell foam sheet and roll forms with fine surface quality, suitable for shoe insole and footwear applications.

Technical Specifications

General Specifications

IXPP Foam Technical Specification (by foam ratio)

Insole Material Comparison

IXPP foam combines firm support, waterproofness, and lasting rebound, making it a premium insole material that outperforms conventional EVA and PE foams.

Applications

Sports Shoe Insoles | Running & Training Shoes | Casual & Walking Shoes | Work & Safety Boots | Orthopedic & Corrective Insoles | Children's Shoes | Heel Pads & Arch Supports | Slippers & Sandals

Frequently Asked Questions

Q1: Why use high density IXPP foam for shoe insoles?
A: High density IXPP grades (100-200 kg/m³) offer firm, stable support that resists compression and flattening over time, while the closed cell structure keeps the insole lightweight and waterproof.
Q2: Is this foam waterproof enough for sweaty feet?
A: Yes. The independent closed-cell structure keeps water absorption as low as ≤2%, preventing moisture retention and the odor and bacteria growth it causes.
Q3: Will the insole lose its cushioning over time?
A: No. Thanks to irradiation cross-linking, IXPP foam has excellent resilience and compression set resistance, maintaining support and cushioning over thousands of steps, outperforming EVA insoles.
Q4: Is IXPP foam safe for direct skin contact?
A: Yes. IXPP foam is environmentally friendly and harmless with low odor and minimal VOC emissions, making it safe for prolonged contact inside footwear.
Q5: Can insoles be die-cut from this foam?
A: Yes. The foam can be die-cut, thermoformed, and skived into precise insole shapes, arch supports, heel pads, and custom orthopedic components with clean edges.
Q6: What is the MOQ, delivery time, and certification?
A: The minimum order quantity is 3000 square meters. Delivery takes 7-10 working days for stock items and 15-25 days for production orders. The product is ISO 9001:2015, RoHS, and REACH certified.