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Home > Quality Control > Lab Testing > Laminate Flooring

SURFACE BOND - ANSI NALFA LF01:2008 (3.10) (adapted)

1.1 A device to produce a groove in the laminate sample

1.2 A barbell or mushroom shaped test pad having a base diameter of 35.6 (+/- 0.1) mm

1.3 Test frame sufficiently strong as to not distort under test load parameters
1.4 Tensile testing apparatus with sufficient movement and load capacity to pull samples apart

4 50 mm x 50 mm x nominal thickness samples

Temperature: 23 (+/- 2) °C
Relative humidity: 50 (+/-) 5%

4.1 Using the device in 1.1, create a circular groove on each sample. The groove shall cut through the surface and 0.0-0.3 mm into the core and produce a circular raised test area having a 35.7 (+/-2 mm) diameter (nominal 1000 mm2 test area)
4.2 Using a hot melt adhesive, with melting point below 150 ° C, spread a thin layer of adhesive across the face of the heated steel pad

4.3 Carefully place the pad with hot adhesive onto the face of the specimen making sure he pad is centered on the test area
4.4 Lightly weight or hold pad in place until adhesive has cooled (apply nominal 0.1-0.2 N/mm2)
4.5 After the adhesive has cooled and hardened, place mounted sample into the tensile tester

4.6 Using the tensile tester, apply a constant speed so that failure or delamination occurs within 30-90 seconds

4.7 Record force at failure and where the location of failure occurred (within the coating, within the glue line, between the coating and the core, within the core, etc.; if partial split, describe rough percentage attributable to each failure mode)

4.8 If glue line failure occurs, reject the value unless above the prescribed specification criteria
4.9 If an individual surface bond value varies more than 0.4 N/mm2 from the average, repeat the test using a different set of samples
4.10 Calculate Individual Surface Bond Values (SBn) and Average Surface Bond Value (SBa) where:
SBn = maximum force (Newtons)/Area (mm) in order to cause delamination
SBa = (SB1 + SB2 + SB3 + SB4)/4


  • Residential  ≥ 1 N/mm2
  • Light commercial  ≥ 1.25 N/mm2
  • Commercial  ≥ 1.25 N/mm2
  • Heavy commercial  ≥ 1.5 N/mm2

Passing requirement per the sales contract

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