Overview
EN ISO 22637:2019 - "Adhesives - Test of adhesive for floor covering - Determination of the electrical resistance of adhesive films and composites" - specifies a laboratory test method to measure the electrical resistance of adhesive films and bonded floor-covering composites. The standard defines how to prepare specimens, the test apparatus, conditioning, and measurement procedures for assessing adhesive electrical behaviour. It is intended as a controlled laboratory method and does not account for every influence that may occur in field installations.
Key Topics and Requirements
- Scope and purpose: Measurement of electrical resistance as a material parameter for adhesive films and floor-covering/adhesive composites (reciprocal of electrical conductivity).
- Defined resistance types (terms and definitions):
- R1 - vertical resistance of floor covering (surface to underside)
- R2 - resistance to ground (bonded floor to ground)
- R3 - point-to-point surface resistance (100 mm electrode spacing)
- R4 - adhesive resistance (cured adhesive film measured between copper strips, 500 mm spacing)
- R5 - vertical resistance of composite (bonded floor covering measured between surface tripod electrode and copper strip underside, 500 mm spacing)
- Apparatus & materials: glass plate (~600 × 120 × 4 mm), uncoated fibre-cement panels (~750 × 300 × 6 mm) as substrate, adhesive applicator, serrated trowel, copper strips (approx. 120 × 10 × 0.08 mm), conductive floor covering, roller (specified mass and dimensions), tripod electrode (per EN 1081), load for electrode, calibrated resistance meter and ventilated heating chamber.
- Specimen preparation & conditioning:
- Adhesive films applied on glass with copper strips at 500 ±10 mm spacing.
- Composite specimens made on fibre-cement panels; panels conditioned 120 h at (50 ±3) °C and reconditioned at standard atmosphere (23 °C/50 % RH) before bonding.
- Conductive floor covering laid into adhesive bed and rolled per procedure.
- Measurement controls:
- Calibrated resistance meter with specified accuracy and selectable test voltages (examples given in the standard: 10 V, 100 V, 500 V) depending on resistance range.
- Roller, electrode loading, and measurement geometry specified to ensure repeatability.
Applications and Who Uses It
- Adhesive manufacturers - to characterize electrical resistance of cured adhesive films for product development and specification.
- Flooring manufacturers and specifiers - to verify conductive or dissipative flooring systems and compatibility with adhesives.
- Test laboratories and QA teams - for routine compliance testing, performance comparison and reporting.
- Electrostatic discharge (ESD) system designers and building engineers - to assess whether adhesive/bonded composite meets required electrical behaviour for ESD-safe environments.
This standard is especially relevant where electrical properties of floor systems matter (e.g., electronics manufacturing, clean rooms, healthcare) and for product specification, conformity assessment, and comparative testing.
Related Standards
- EN 1081 (tripod electrode / surface resistance)
- ISO 9142 (laboratory ageing conditions)
- ISO 554 (conditioning atmospheres)
- ISO 15605 (adhesive sampling)
- EN 1067 (sample preparation)
Keywords: EN ISO 22637:2019, adhesive electrical resistance, adhesive testing, floor covering, adhesive films, vertical resistance, conductive flooring, R4, R5.
