BS EN 17333-3:2020 pdf free.Characterisation of one component foam,Application.
BS EN 17333-3 This document specifies test methods for the evaluation of the application properties for moisture curing, self-curing activatable or water drying foams dispensed from single pressurized foam containers. This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use. The following test methods are described: 一Method 1 – Cutting time: This test method describes how to determine the hardening time of a dispended froth until it could be cut. 一Method 2 – Tack free time: This test method describes how to determine the tack free time of a freshly foamed OCF.一Method 3 – Sagging: This test method describes how to evaluate the sagging behaviour and determine the biggest joint possible before dispensed froth slips off.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.EN 923, Adhesives – Terms and definitions
EN 15006, Metal aerosol containers – Aluminium containers – Dimensions of the 25,4 mm aperture EN 14847, Aerosol containers . Tinplate containers . Dimensions of the 25,4 mm aperture.4.1.1 Principle The liquid foam is dispensed in defined beads on a horizontal surface. After a certain time for curing, the bead is cut. The cutting time is reached when the cut surface is not sticky anymore, the knife remains clean without foam residues and the foam is not squeezed. NOTE The measured value depends strongly on the dispensed bead diameter as well as the humidity, temperature and the processing and tools. The cutting time gives an indication about the water transport inside the foam body, therefore about the foam quality.BS EN 17333-3 pdf downlaod.