Polyurethane Coating Testing
Applicable products:Two component polyurethane coatings, one component polyurethane coatings, water-based polyurethane coatings, solvent based polyurethane coatings, polyurethane topcoats, polyurethane varnishes, polyurethane anti-corrosion coatings, polyurethane wood coatings, polyurethane floor coatings, polyurethane high-temperature resistant coatings, polyurethane waterproof anti-corrosion coatings.
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Product Introduction

Detection range
Applicable products:Two component polyurethane coatings, one component polyurethane coatings, water-based polyurethane coatings, solvent based polyurethane coatings, polyurethane topcoats, polyurethane varnishes, polyurethane anti-corrosion coatings, polyurethane wood coatings, polyurethane floor coatings, polyurethane high-temperature resistant coatings, polyurethane waterproof anti-corrosion coatings.
Applicable substrate:Metal, concrete, wood, plastic, ships, engineering machinery, bridges, pipelines, furniture, flooring, automotive parts, etc.
Applicable scenarios:Raw material incoming inspection, production process control, factory inspection, type testing, engineering acceptance, environmental assessment, weather resistance/wear resistance/salt spray resistance verification, quality arbitration.
Testing items
(1) Original paint and construction performance
Appearance, color, fineness, viscosity, density, flash point, non-volatile matter content
Storage stability, shelf life, workability, leveling ability, covering power
Table drying time, actual drying time, curing time, recoating ability, compatibility
(2) Physical and mechanical properties of paint film
Appearance, gloss, color difference, and dry film thickness of paint film
Pencil hardness and adhesion (cross cut method, pull open method)
Impact resistance, flexibility, wear resistance, scratch resistance, cupping performance
(3) Environmental and medium resistance performance
Water resistance, alkali resistance, acid resistance, oil resistance, solvent resistance, moisture and heat resistance
Weather resistance: Xenon lamp aging, QUV ultraviolet aging, artificial climate aging
Salt spray resistance: neutral salt spray, acetic acid salt spray, copper accelerated salt spray
Coating aging rating: loss of gloss, discoloration, powdering, blistering, rusting, cracking

(4) Special Performance of Polyurethane
Wear resistance (key points for flooring and wood)
Chemical resistant, lubricating oil resistant, fuel oil resistant
Low temperature toughness, resistance to high and low temperature cycling
Hydrolysis resistance and mold resistance
(5) Environmental Protection and Safety Performance
VOC content, benzene derivatives, free formaldehyde
Heavy metals: lead, cadmium, mercury, hexavalent chromium
Free isocyanates (key project)
Food contact migration amount (if applicable)
Testing standards
GB/T 1723-1993 Determination of viscosity of coatings
GB/T 1724-1979 Determination of Fineness of Coatings
GB/T 1725-2007 Determination of Non volatile Matter Content in Coatings
GB/T 1728-2020 Determination of Drying Time of Paint Films
GB/T 6739-2006 Pencil Hardness Determination
GB/T 9286-1998 Cross grid Adhesion
GB/T 5210-2006 Pull off adhesion method
GB/T 1731-2020 Flexibility of Paint Films
GB/T 1732-2020 Impact resistance of paint film
GB/T 1733-1993 Water resistance of paint film
GB/T 1763-2008 Coating Resistance to Chemical Reagents
GB/T 1766-2008 Coating Aging Rating
GB/T 1865-2009 Xenon Lamp Artificial Climate Aging
GB/T 10125-2021 Salt Spray Test
GB/T 23986-2009 Determination of volatile organic compound (VOC) content in paints and varnishes
GB 30981-2020 Limits of Hazardous Substances in Industrial Protective Coatings
GB/T 24410-2021 Limits of Hazardous Substances in Building Wall Coatings
HG/T 3668-2000 General Technical Conditions for Coatings
was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.
The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.















