Table 7 performance requirements for physical

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Unformatted text preview: if specifically agreed to by the manufacturer and purchaser. In these instances, the adhesive shall comply with all other requirements of the standard. (2) This requirement may be waived by agreement of the purchaser and supplier. Table 7. Performance Requirements for Physical Properties of Resorcinol and PhenolResorcinol Resin Adhesives for Wood (Room- and Intermediate-Temperature Curing) Property Unit Requirement Insoluble material % ≤ 20 by mass Amylaceous matter n/a no indication of the presence of amylaceous matter pH of cured film n/a 2.5 ≤ pH ≤ 11.0 Shear strength - compression loading MPa ≥ 19 average shear strength Plywood shear strength • dry • cold soak • boil ≥ 2 800 average shear strength kPa ≥ 3(1) Liquid working life at 21°C to 24°C hours Storage life - after six months at 21°C to 24°C n/a meets the requirements of CSA O112.7(2) Delamination (Type II only) % ≤8 of the total length of all adhesive lines 7 of 10 Table 7. Performance Requirements for Physical Properties of Resorcinol and PhenolResorcinol Resin Adhesives for Wood (Room- and Intermediate-Temperature Curing) (cont.) Property Unit Requirement Creep • environment “A” 71°C, ambient RH, seven days • environment “B” 26.7°C, 90% RH, seven days ≤ 3.63 mm total for two specimens combined for each environment Notes to Table 7: (1) Even if the working life is less than three hours, the adhesive may be supplied under CSA O112.7 if specifically agreed to by the manufacturer and purchaser. In these instances, the adhesive shall comply with all other requirements of the standard. (2) This requirement may be waived by agreement of the purchaser and supplier. Table 8. Performance Requirements for Physical Properties of Polyvinyl Adhesives - Cross Linking, for Wood Property Unit Requirement Total solids % ≥ 40 Ash content % ≤8 stormer grams mPa·s 275 ≤ μ ≤ 1 350 1 000 ≤ μ ≤ 9 000 MPa ≥ 19 average shear strength Viscosity • stormer; or • brookfield Shear strength - compression loading Plywood shear strength • dry ≥ 2 600 average shear strength ≥ 1 900 average shear strength ≥ 1 900 average shear strength ≥ 2 600 joint strength • cold soak kPa • boil (Type I only) • heat Storage life - for two months at 21°C to 24°C n/a meets the requirements of viscosity, shear strength by compression loading, and plywood shear strength 8 of 10 Table 9. Performance Requirements for Physical Properties of Adhesives for Structural Wood Products (Exterior Exposure) Property Anti-fungal properties(1) Unit Requirement n/a no indication of the presence of fungal growth pH of cured adhesive film n/a Block shear strength(2) • dry • vacuum-pressure • boil-dry-freeze 3.0 ≤ pH ≤ 11.0 Hardwood Softwood ≥ 19 ≥ 10 ≥ 11 ≥ 5.6 ≥ 6.9 ≥ 3.5 Hardwood(3) Softwood(3) MPa Percent wood failure Lower Lower Median Median quartile quartile • dry • wet % 75 85 80...
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This note was uploaded on 06/21/2013 for the course ECON 101 taught by Professor Sdas during the Fall '11 term at American Indian College.

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