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BSI PD CEN/TS 927-9:2023

BSI PD CEN/TS 927-9:2023

$102.76

Paints and varnishes. Coating materials and coating systems for exterior wood – Determination of pull-off strength

Published By Publication Date Number of Pages
BSI 2023 18
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This document specifies a method for assessing the resistance of a coating system on wet wood to separation from the substrate by measuring the force necessary to detach or rupture the coating system by a normal tensile strain applied through an attached stud (dolly). Additional information is gained by noting the type and locus of failure. The force required for detachment will depend on several factors including the adhesion of the coating to the substrate and between intermediate coating layers. The procedure is not regarded as a direct means of measuring adhesion but an indicator of adhesive performance (adherence) under wet conditions. A procedure for wetting the wood substrate is described. The test method is only suitable for wood and wood-based substrates. For dry adhesion the test method can be carried out without wetting, in which case it will differ very little from EN ISO 4624.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
8 5 Apparatus and materials
5.1 Test apparatus
5.2 Test dollies
5.3 Adhesives
9 6 Test panels
6.1 Wood substrate
6.2 Conditioning
6.3 Coating of test panels
6.3.1 Coated panels not exposed to weathering
6.3.2 Coated panels exposed to weathering
10 7 Procedure
7.1 Testing conditions
7.2 Preparation of the samples
7.3 Order of the test samples
7.3.1 Non-standard panels
7.3.2 Standard EN 927 exposure panels
12 7.4 Testing procedure
7.5 Evaluation of fracture
13 8 Calculation and expression of results
9 Precision statement
10 Test report
15 Annex A (informative)Interpretation of test results

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BSI PD CEN/TS 927-9:2023
$102.76