Лако-красочные материалы — производство

Low temperature testing can be to determine whether the adhesive can be applied effec­tively at that low temperature, or whether it functions satisfactorily when in use at that temperature. Both require the use of a cold box with access to manipulate the samples and test equipment, the test equipment being either totally or partially enclosed within the cold box. The sample to be tested and all materials needed to set the test up must be in the cold box at the chosen temperature for at least 4 h before testing begins. Test panels will need to be washed with acetone to remove any condensate, then thoroughly dried with a lint-free wipe just prior to application of the adhesive. Testing can then proceed as normal, using whatever test methods are felt appropriate, usually including a peel adhesion test. In a functional test which involves adhesive separation from a test surface, if the adhesion value obtained is sufficiently high to reflect a satisfactory bond, any adhesive transfer due to brittle fracture that occurs under these conditions is usually discounted.