Description
Technical Parameters
Material Overview
WINIW manufactures specialized, chemical-resistant synthetic leather engineered specifically to prevent surface swelling, hardening, and molecular degradation when exposed to corrosive acids, alkalis, and industrial cleaning agents. Conventional synthetic materials degrade rapidly under chemical contact, leading to topcoat peeling, loss of tensile strength, and early material failure.
By chemically formulating our advanced polyurethane (PU) and polyvinyl chloride (PVC) resins with cross-linked protective polymers and using dense microfiber base backings, we engineer roll goods that resist corrosive exposures such as 30% Sulfuric Acid (H2SO4) and 20% Sodium Hydroxide (NaOH). Our chemical-resistant substrates are custom-calibrated for safety footwear, protective work gloves, laboratory seating, and industrial equipment covers directly from our China factory.
Technical Specifications and Chemical Resistance Testing Standards
To pass strict facility audits, public tenders, and workplace safety compliance, our acid and alkali resistant substrates undergo rigorous immersion and mechanical retention testing in our certified on-site laboratory:
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Chemical Exposure Agent
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Concentration Level
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Contact Exposure Time
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Mechanical Property Retention
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Test Reference Protocol
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Sourcing Compliance Status
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Sulfuric Acid (H2SO4)
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30% Concentration
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20 hours continuous
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Tensile strength retention ≥ 85%
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EN ISO 20344 / EN 344
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Passed (Class I Protection)
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Sodium Hydroxide (NaOH)
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20% Concentration
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20 hours continuous
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Tear strength retention ≥ 80%
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EN ISO 20344 Section 5.1
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Passed (Industrial Safety)
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Sodium Chloride (NaCl)
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10% Saline Solution
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48 hours continuous
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Surface color gray scale ≥ 4
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ISO 11640 / ISO 105-E04
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Passed (Salt Spray Resistant)
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Martindale Abrasion
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Dry / Wet Rubs
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After chemical exposure
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Endures > 50,000 cycles (No cracking)
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EN ISO 12947-2 (12 kPa Load)
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Certified (High Durability)
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Bally Flexing Endurance
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Room Temperature
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After chemical exposure
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Endures > 50,000 cycles (No cracking)
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EN ISO 5402-1
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Passed (Crease Recovery)
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Stitch Tear Strength
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Warp & Weft
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Untreated control
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High-tenacity performance ≥ 55 N
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EN ISO 3377-2
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Passed (High Seam Security)
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Material Structure Selection: Engineering for Chemical Defense
Preventing polymer decomposition under chemical contact requires selecting the right base structures and surface modifications:
1. 3D Sea-Island Microfiber Matrix (The Ultimate Structural Defense)
Our high-end chemical-resistant microfiber leather series utilizes a dense, three-dimensional non-woven sea-island nylon fiber matrix. Because this backing fabric mimics the natural collagen bundle network of real hide, it naturally distributes mechanical stress. Even if chemicals partially penetrate the topcoat, the high-density nylon fibers resist degradation, preventing eyelet tear-out and preserving high seam strength (≥ 55 N under EN ISO 3377-2).
2. Specialized Polyether Polyurethane Coatings (The Footwear Standard)
Traditional PU leathers use cheap polyester resins that undergo rapid chemical hydrolysis under acid contact, causing the surface to crumble. WINIW coats its protective footwear materials with highly cross-linked polyether-grade polyurethanes. These polymers replace vulnerable ester linkages with stable ether bonds that resist acidic water cleavage, easily passing EN ISO 20344 chemical exposure tests.
3. High-Molecular-Weight PVC Vinyl (The Heavy-Duty Industrial Standard)
Standard PVC uses monomeric plasticizers that migrate and react with industrial solvents, causing the material to harden and crack. WINIW utilizes medical- and toy-grade polymeric plasticizers that remain chemically locked within the PVC vinyl matrix. This formulation preserves perfect flexibility and chemical resistance under constant contact with industrial alkalis, making it ideal for safety gloves and protective lab seating.
Composite synthetic leather
Application-Specific Chemical-Resistant Solutions
We custom-tailor the chemical stabilizers, backing fabrics, and thickness caliper of our substrates to meet the target requirements of four major B2B sectors:
- Safety & Industrial Footwear (EN ISO 20345): Supplied in 1.8mm to 2.0mm thickness with oil-resistant and acid-resistant uppers, engineered to protect industrial workers on active chemical plants, petrochemical refineries, and metal processing lines.
- Protective Work Gloves (EN 388 / EN 374): Highly flexible, breathable microfiber suede (0.6mm to 0.8mm) and PVC palms engineered to provide steady wet/dry grip and mechanical protection without hardening after contact with detergents.
- Laboratory & Medical Seating: Waterproof, non-porous PU and silicone upholstery designed to resist harsh chemical sanitizers, hospital-grade disinfectants, and alcohol wipe-downs (70% IPA) without color fading or cracking.
- Industrial Equipment & Valve Covers: Heavy-duty, high-tensile PVC and PU protective sheeting designed to shield critical factory machinery from accidental acid splashes, oil leaks, and outdoor weathering.
Common applications of acid and alkali resistant synthetic leather
Acid and alkali resistant synthetic leather is widely used in many fields due to its unique properties:
Chemical industry:
Used for protective covers and pipe wrapping of chemical equipment to resist corrosion from chemicals such as acids, alkalis, and salts.
Medical field:
Used for laboratory countertops, protective clothing, medical equipment packaging, etc. to ensure the stability of materials during disinfection and cleaning.
Laboratory equipment:
Used for laboratory bench pads, instrument protective covers, etc., to provide protection against chemical corrosion.
Industrial protection:
Used in industrial gloves, protective clothing, etc. to protect workers from harm from chemical substances.
Special furniture:
Furniture used in chemical plants, laboratories, etc., such as chairs, desktops, etc., providing durable surface protection
Our Closed-Loop Custom Engineering Process
To satisfy strict public tenders, brand R&D compliance filings, and OEM specifications, WINIW operates a closed-loop custom development line to tailor-make the exact physical properties you need:
- Standard Analysis: You provide your target regulatory or industry codes (e.g., IATF 16949, EN ISO 20345, BS 5852 Crib 5).
- Formulation Matching: Our laboratory adjusts polymer cross-linking density, UV stabilizers (HALS), plasticizer molecular weights, and backing fibers.
- Pilot Lab-Dip Production: We manufacture physical swatches matching your custom Pantone color and gloss levels within 7 to 10 days.
- On-Site Destructive Testing: Swatches undergo Wyzenbeek double rubs, tropical chamber hydrolysis, and low-temperature Bally flex tests to verify compliance.
- Traceable Mass Production: Once approved, volume production is completed within 15 to 20 days with strict batch-code traceability.
Sourcing Policy: MOQ, Lead Time, and Packaging
- Minimum Order Quantity (MOQ): Our standard custom manufacturing MOQ for chemical-resistant microfiber substrates is 300 linear meters per color and thickness. For standard PU or PVC formulations, the MOQ is 1,000 linear meters per color and thickness. For standard program stocks in black or white, we can dispatch trials starting from 100 linear meters to support your prototyping.
- Color Matching Consistency: Lot-to-lot color shading (ΔE) is a critical quality concern for automated assembly lines. Our laboratory utilizes automated gravimetric pigment dispensers and Datacolor spectrophotometers to maintain the overall color difference strictly under ΔE≤0.82 under standard D65 illuminants.
- Packaging and Transport: All bulk rolls are packed in dual-layer PE moisture-barrier roll wrapping with heavy-duty woven outer PP bags and labeled with unique traceable batch-code roll IDs.
Buyer Sourcing FAQs
Q: Does a material being "chemical-resistant" mean it is immune to all industrial solvents?
A: No. Chemical resistance is highly specific to the chemical type, concentration, contact duration, and temperature. A material that is highly resistant to sulfuric acid (EN ISO 20344) may still experience surface swelling when exposed to harsh organic solvents like acetone or MEK. WINIW recommends providing your specific chemical exposure list and target concentration levels so our laboratory can match the correct polymer formulation.
Q: Does adding chemical-resistant properties make the synthetic leather stiff or heavy?
A: Absolutely not. While cheap industrial coatings use heavy fillers that harden the material, WINIW utilizes advanced polyurethane resins and sea-island microfiber bases. This process ensures the material retains high flexibility, passing over 100,000 Bally flex cycles under room temperature, while maintaining a supple, luxurious touch suitable for high-end safety shoes and work gloves.
Contact Our Engineering Materials Team
- Plant Footprint: 100,000 m² total manufacturing area
- Annual Output: 2,000,000 meters of high-grade synthetic roll goods
- On-Site Lab: Certified thickness gauges, tensile testers, and Bally flex chambers
- Direct Inquiry Email: MKT@MicrofiberLeather.com
- B2B WhatsApp: +8618150976625
- Corporate Address: 3rd Floor, Huixia Building B, Meiling Street, Jinjiang, Quanzhou, Fujian 362200 China
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