Of many methods for determining the adhesion, one of the simplest and widely used is a scratch test
. This method is characterized by a relatively short measurement time and high repeatability of easily interpretable results, and it simulates the load (stress) occurring during the use of the product with the coating.
In this study, the q parameter was assumed to be 2 because of plastic deformation of the sample during the scratch test
Traces which were created during the Scratch Test
are shown in Fig.
In this article, first, an integrated approach of scratch test
and finite element simulation was adopted to verify the criteria to assess the scratch resistance of PP.
Firstly, back scratch test
and strength test were measured.
At the baseline, all individuals were asked to perform functional tests in lower (Chair Stand Test for leg strength, Time Up and Go Test for dynamic balance) and upper limbs (Moberg Pickup Test, Back Scratch Test
, Arm Curl Test, Handgrip Strength Test, and Spiral Drawing Test).
In tests, nylon 6 with Solid-TT improved scratch resistance by 71%, and transparent, cycloaliphatic nylon 12 with the additive exhibited improved scratch resistance of 55%, according to the turntable-type Erichsen Scratch Test
Back scratch test
: Upper body flexibility using back scratch test
was assessed by asking the participants to bring their hands toward the back (one hand from above the shoulder and other hand from middle of back) and asking them to touch each hand.
In an attempt to put the scratch test
on a firmer footing, Oroshnik and Croll (24) developed the concept of "Threshold Adhesion Failure" or TAF.
Microindentation and scratch tests
were performed, respectively, with a Vickers hardness testing machine and scratch test
The scratch test
which reveals non-precious metal under the gold.
. The test animals were abraded by slightly scratching the skin five to seven times with a 20 gauge hypodermic needle, followed by the application of patches with the test drug and the control.