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Table 2 Minimum values of adhesive strength for thin durability class

From: Synthesis and characterization of green phenolic resin with olive oil mill wastewater

Test number

Test conditions

Scale

Strength (N/mm2)

C1

C2

C3

C4

Pre-treatment 1

(7 days in standard conditions)

 ≥ 10

 ≥ 10

 ≥ 10

 ≥ 10

Pre-treatment 2

(7 days in standard conditions

24 h in cold water at (20 ± 5) °C)

 ≥ 7

 ≥ 7

 ≥ 7

Pre-treatment 3

(7 days in standard conditions

3 h in boiled water

2 h in cold water at (20 ± 5) °C)

 ≥ 4