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BS EN 15425:2023

BS EN 15425:2023

$142.49

Adhesives. One component polyurethane (PUR) for load-bearing timber structures. Classification and performance requirements

Published By Publication Date Number of Pages
BSI 2023 28
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This document establishes a classification for one component polyurethane (PUR) adhesives according to their suitability for use in load-bearing timber products in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the factory manufacture or factory-like manufacturing of load-bearing timber products only. It also classifies “adhesive product lines” where all the products within the line have the same chemical composition except for a different amount of catalyst. This document only specifies the performance of adhesives for use in an environment corresponding to the defined conditions. The performance requirements of this document are applicable to the adhesives only, not to the manufactured timber products. This document does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) or the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. acetylated wood, heat treated wood and polymer impregnated wood. This document is primarily intended for use by adhesive manufacturers and for use in timber products bonded with adhesives, to assess or control the quality of adhesives. The requirements are applicable to the type testing of the adhesives. Production control activities are outside the scope of this document. Adhesives meeting the requirements of this document are adequate for use in load-bearing timber products, provided that the bonding process has been carried out according to an appropriate product standard. This document does not address the classification and use of adhesives in combination with the spraying of water before or during the bonding process; see informative Annex C of this document. This does neither allow nor forbid the use of adhesives in combination with the spraying of water.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
10 4 Classification
13 5 Requirements
5.1 General
14 5.2 Bond strength in longitudinal tensile shear test
15 5.3 Resistance to delamination
5.4 Tensile strength perpendicular to the bond line after climatic treatment (acid damage test)
5.5 Effect of wood shrinkage on the shear strength
5.6 Static load test of multiple bond line specimens in compression shear
16 5.7 Creep deformation test at cyclic climate conditions with specimens loaded in bending shear
5.7.1 Application area “Finger-jointing” – close contact glue line in test
5.7.2 Application area “General purpose” – 0,3 mm glue line thickness in test
5.7.3 Application area “Special purpose” – 0,5 mm glue line thickness in test
5.8 Long-term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the bond line (“Glass house test”)
5.9 Delamination test on finger-jointed test pieces
17 6 Test methods
6.1 General
6.2 Determination of longitudinal tensile shear strength
6.3 Determination of resistance to delamination
6.4 Determination of tensile strength perpendicular to the bond line after climatic treatment (acid damage test)
6.5 Determination of the effect of wood shrinkage on the shear strength
6.6 Static load test of multiple bond line specimens in compression shear
18 6.7 Creep deformation test with specimens loaded in bending shear
6.8 Long-term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the bond line (“Glass house test”)
6.9 Delamination test on finger-jointed test pieces
7 Working properties of the adhesive
7.1 General
7.2 Determination of initial viscosity under reference conditions
7.3 Determination of open assembly time under reference conditions
19 7.4 Determination of pressing time under reference conditions
8 Marking and labelling
20 Annex A (normative)Climatic treatment prior to shear test
21 Annex B (normative)Delamination test for bonding of finger-joints
B.1 Production of the specimens
22 B.2 Testing
23 B.3 Expression of results
B.4 Test report
B.4.1 Adhesive
B.4.2 Preparation of test pieces and testing procedure
24 B.4.3 Test results
25 Annex C (informative)Information on bonding operations with one-component polyurethane adhesives in combination with water-spraying

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BS EN 15425:2023
$142.49