Overview
DOLLY50APK100 is a spindle accessory designed by the American Defelsko brand for the PosiTestAT series of pull-out adhesion meters. The spindle has a diameter of 50mm, a starting pressure of 0.35MPa, and a single Encasement contains 100 spindles. It is suitable for different testing needs, and its maximum drawing pressure varies according to the instrument model (AT-M or AT-A).
Features
1. Specially designed for PosiTestAT series pull adhesion instrument, good compatibility.
2. 50mm standard diameter available for specific range of adhesion testing.
3. Low Starting Pressure (0.35MPa), High Test Sensitivity.
4. Encasement specification is 100 pcs/package to meet the needs of batch testing.
Principle
The spindle is a key component in adhesion testing. During testing, the spindle is fixed to the surface of the coating to be tested by a special Adhesive. The puller applies a vertical upward tension to the coating through the spindle until the coating is pulled off or cohesive failure occurs. The spindle transfers tension during this process, and its size and starting pressure determine the range of force values tested and the starting conditions.
Applications
Coating adhesion testing, construction engineering mass assessment, industrial anti-corrosion coating testing, aerospace coating inspection, automotive painting quality control
Standards
ASTM D4541、ISO 4624、ASTM D7234
Steps
1. Clean and prepare the coating surface to be tested.
2. Select and apply the appropriate Adhesive according to the standard.
3. Align the spindle and stick it on the coating surface to ensure complete gluing and bubble-free.
4. Adhesive complete curing.
5. Align the test head of the pull adhesion instrument with the spindle and connect it.
6. Start the instrument and apply tension at a steady rate until destruction occurs.
7. Record the maximum pulling force value displayed by the instrument.
8. Observe and record the type of damage (adhesion damage, cohesion damage, or mixed damage).
Notice
* Please make sure that the spindle and the surface to be tested are clean, drying and free of oil before use.
* The correct Adhesive must be selected according to the test criteria and requirements, and ensure its complete curing.
* When pasting the spindle, align the position and apply uniform pressure to remove bubbles.
Do not exceed the maximum drawing pressure specified for this size spindle (3.5 MPa for AT-M type and 3.8 MPa for AT-A type).
* Adhesive performance, curing conditions and operation methods are affected by test results, and relevant test standards must be strictly followed.
* Spindle is a consumable, do not use it for repeability after damage or deformation, so as not to affect the test accuracy.
