Finish Film Adhesion Tester For Testing Lab

Finish Film Adhesion Tester - The strength of adhesion between finish film and the leather surface it is applied on may be found either by pressing a pressure sensitive adhesive tape over it and peeling it off, or by separating the finish film from leather and finding the force needed to separate it further. The first method is empirical in nature and cannot be reproduced accurately as the adhesion strength of various adhesive tapes and their bonding with the finish surface cannot be standardized. Hence the second method Is generally used for this determination.   In SATRA method for determination of finish film adhesion, a smooth metallic or rigid PVC specimen-mounting strip is pasted onto the finish film along the length of the test specimen with the help of a suitable adhesive. After the bond is set, the sides of the test specimen are trimmed flush with the edges of the mounting strip and the mounting strip held in a horizontal plane. The end of the test specimen is separating from the finish film and a pan containing dead weights suspended from it. The force needed to cause the finish film layer to separate further is determined by adding dead weights to the pan till the separation of the film from the leather takes place.   The  Finish Film Adhesion Tester (SATRA type) for leather consists of an arrangement to hold the test specimen with the mounting strip on a suitable frame, a hanger with disc shaped dead weights to apply the separating force on the film and leather bond, and a hinged platform on which the pan can rest with an arrangement to lower it.  civil lab equipments manufacturers

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