China Viscoelastic Coating System - High-Performance Anti-Corrosion Solution from China Suppliers & Factory Manufacturers, Factories

The viscoelastic coating system, widely recognized among China suppliers and factories, features a robust two-layer or three-layer configuration designed for optimal performance, a) The first layer consists of a viscoelastic anticorrosion mastic that effectively fills gaps and grooves, creating a smooth surface. This step is specifically intended for use on valves and other irregular objects, b) The second layer is made up of viscoelastic tape, a non-crystalline low-viscosity polyolefin compound. This innovative tape boasts excellent self-sealing and anticorrosion properties, allowing for direct application without the need for primer or adhesive, c) Finally, a polymeric outer wrap completes the system, providing additional protection and durability, Choose our viscoelastic coating system for superior anticorrosion solutions that meet industry standards and ensure long-lasting performance

Product Description

Construction
Inner Wrap: Composed of a layer of non-crystalline, low-viscosity, and non-reactive polyolefin-based compound, reinforced with a fabric layer. The polyolefin-based compound bonds directly to the substrate.
Outer Wrap (Two-Layer Wrapping Tape): Features a polyvinyl chloride (PVC), polyethylene (PE), or polypropylene (PP) backing layer with a laminated butyl-rubber adhesive on one side. Compatible with the inner-layer tape and offers robust mechanical protection.
Performance of Viscoelastic Coating System
Viscous Elastic Inner Layer
Item Spec. Performance
Width 100mm ± 10% 99.5mm
Thickness > 1.5mm 1.98mm
Glass transition temperature Tmin = -20°C Tmin = -20°C
Crystallization temperature No evidence of crystallization No evidence of crystallization
Holiday detection at 5KV/mm, max. 25KV No holiday No holiday
Drip resistance No dripping of compound No dripping
Lap shear strength at 23°C > 0.004 N/mm² 0.027 N/mm²
Lap shear strength at 70°C > 0.002 N/mm² 0.00532 N/mm²
PVC Outer Wrap
Peel strength, outer wrap to outer wrap Spec. Performance
23°C > 0.2 N/mm > 0.2 N/mm
70°C > 0.02 N/mm > 0.02 N/mm
Total Coating System
Impact resistance 2J/mm, 10 times No holiday No holiday
Indentation resistance at pressure 1.0 N/mm²
Holiday detection at 25KV No holiday No holiday
Residual thickness Min. 0.6mm 1.39mm
Self-heating effect on Dia. 6mm artificial defect (inner wrap), 24 hrs No holiday No holiday
Frequently Asked Questions (FAQ)
Q What materials are used in the inner wrap of the viscoelastic coating system?
The inner wrap consists of a non-crystalline, low-viscosity, and non-reactive polyolefin-based compound reinforced with a fabric layer. This compound bonds directly to the pipeline substrate, ensuring excellent adhesion and corrosion protection.
Q What types of backing materials are available for the outer wrap tape?
The outer wrap tape is available with three backing material options: polyvinyl chloride (PVC), polyethylene (PE), or polypropylene (PP). All options feature a laminated butyl-rubber adhesive on one side and are fully compatible with the inner-layer tape.
Q What is the minimum operating temperature for the viscoelastic inner layer?
The viscoelastic inner layer has a glass transition temperature (Tmin) of -20°C, meaning it maintains its protective and mechanical properties at temperatures as low as -20°C without crystallization occurring.
Q How is the holiday detection test performed and what are the pass criteria?
Holiday detection is conducted at 5KV/mm up to a maximum of 25KV for the inner wrap, and at 25KV for the total coating system. The acceptance criterion is "No Holiday," meaning zero pinholes or discontinuities in the coating — a standard this system consistently meets.
Q What mechanical protection does the total viscoelastic coating system provide?
The total coating system demonstrates strong mechanical performance: it withstands impact resistance tests at 2J/mm for 10 repeated impacts with no holiday detected, and maintains a residual thickness of 1.39mm (minimum spec: 0.6mm) under indentation pressure of 1.0 N/mm².
Q Does the viscoelastic coating system self-heal over pipeline defects?
Yes. The system was tested for self-healing ability on a 6mm diameter artificial defect in the inner wrap over a 24-hour period. The result confirmed no holiday, demonstrating the viscoelastic material's ability to flow and re-seal minor defects on the substrate over time.

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