Polyurethane Adhesive Testing

Applicable products:Two component polyurethane adhesive, one component moisture cured polyurethane adhesive, water-based polyurethane adhesive, solvent based PU adhesive, polyurethane structural adhesive, polyurethane hot melt adhesive (PUR), polyurethane sealant, polyurethane composite adhesive, polyurethane potting adhesive, and polyurethane adhesive for food packaging.

Applicable substrate:Metal, plastic, wood, leather, fabric, film, aluminum-plastic composite panel, cardboard box, shoe material, insulation board, automotive interior, etc.

Applicable scenarios:Raw material acceptance, formula matching, curing performance, adhesive strength, weather/hydrolysis resistance verification, environmental and safety assessment, factory inspection, quality arbitration.

(1) Appearance and physical and chemical properties
Appearance, color, condition, uniformity, impurities, odor
Density, viscosity, solid content, non-volatile matter, pH value, flash point
Ratio accuracy, mixing ability, storage stability, freeze-thaw stability
(2) Curing and Construction Performance
Applicable period, surface drying time, actual drying time, complete curing time
Curing conditions (temperature, humidity), wet curing speed
Flattening, coating, recoating, interlayer adhesion
(3) Adhesive and mechanical properties
Tensile shear strength, peel strength (180 °/90 °)
Tensile strength, tear strength, elongation at break
Impact strength, hardness (Shore A/D), compressive strength
Initial adhesion, holding adhesion, and sleeve strength
(4) Special Performance of Polyurethane
Content of free isocyanate (NCO)
Resistance to hydrolysis, moisture and heat aging, and high and low temperature cycling
Low temperature flexibility, thermal stability, and resistance to yellowing
Rebound rate, compression permanent deformation (elastic adhesive)