Scotch-tape test

There are some standard adhesion tests used by the paint and coatings industry, which we have adopted for our work. The most common is the Scotch tape test, which is described by an ASTM D3359, method B. 

Figure 3. Adhesion (Scotch tape test) of PVDF/LBG1025 coating showing poor adhesion ofgraphite to copper current collector.

Adhesion tests can be broken into two categories qualitative and quantitative. They vary from a simple Scotch tape test to a complicated flyer tape test, which requires precision-machined specimens and a very expensive testing facility. Quantitative (such as peeling) tests have been developed for coatings on plastics (12), but not to the same extent for metal-to-metal systems. The quantitative testing systems in limited use, mainly in the electronics industry, are not commonly present in production plants but have been used to aid in process development. For quality control purposes, qualitative tests for metal-to-metal adhesion (13) are usually adequate. The adhesion of some plated metal parts is improved with baking for 1 to 4 h at relatively low (120 to 320°C) temperatures. 

Required on front folder in a clear, sharp, permanent-type print in black ink. Permanent adhesive labels may be used in a clear, sharp print. Printing must withstand a Scotch Tape Test, which consists of pressing a strip of Scotch tape firmly on the printed area and removing it. There should be no transfer of the printed area on the tape. 

The surface area of the membrane materials was measured before and after SASRA treatment by a single point BET instrument with a TC-detector. Three samples were run in parallel and the amount of adsorbed nitrogen on the sample surface was measured and used for calculating the surface area. The phase composition was characterised by XRD. After SASRA treatment the adherence of the membranes to the support was tested by the Scotch Tape Test [26], In this test, a piece of Scotch Tape was applied firmly with the sticky side onto the membrane surface and torn off rapidly. If the membrane layer was torn off together with the tape, it was concluded that delamination had occurred. For membranes that showed no sign of delamination, the pore-size was measured with permporometry for a second time. 

Standard y-alumina membrane-layers on CX-AI2O3 supports not treated with MAP and prepared as described in [10] always came off in the Scotch Tape Test after SASRA treatment. As shown in Figure 1 (a and b), in these membranes a crack is formed in the membrane-support interface leading to delamination. When the support was treated with MAP, however, after steam treatment no delamination was observed. 

With the help of complementary surface analysis techniques such as XPS, Static SIMS and AES, we have been able to show how a short (23 msfilms leads to a slight oxidation of the surface as well as to the formation of N2 containing species. These modifications are necessary for the improvement of the adhesion observed with a scotch-tape test. However, the presence of oxygen is not the only factor responsible for a good adhesion, since the AES profiles of die deposited aluminium, show the same oxidized interface in the case of the non treated metallized polymeric film. The films are pretreated in a corona discharge configuration (hollow electrode-grounded cylinder) and the aluminium is deposited onto the film in situ. 

Analysis of the Non Metallized. Pretreated Polypropylene. In a previous paper (1), we have shown that for very short treatment times (23 ms) in N2 or NH3 plasma, the first observed effect of the plasma was an increase of the dispersive component (y ) of the polypropylene surface tension. Since almost no nitrogen nor oxygen were detected by XPS for treatment times shorter than 0.7 s, it was concluded that the plasma had first a physical effect rather than a chemical one, although the efficiency of the treatment on the Al-PP adhesion was high (as proven by the use of a scotch-tape test). 

When tungsten is deposited by means of CVD there is almost no adhesion to dielectric materials like silicon dioxide and silicon nitride. To overcome this problem an adhesion promoting layer prior to the tungsten deposition is deposited. Sputtered films such as TiW and TiN have received the most attention [Ellwanger et al.7, Rana et al.8] and have proven to provide adequate adhesion. With respect to this it must be emphasized that macroscopic adhesion (Scotch tape test or bond pull test) in itself is not a valid proof of adhesion. The ultimate evidence can only be obtained when... 

Print key may be checked by the Scotch tape test, where a strip is applied to the surface to be tested and is then removed in a standard way with observation for print lift. 

Scotch tape test" - qualitative test that measures film adhesion a piece of adhesive tape is pressed to the film, pulled off, and examined for the presence of film. 

Scotch-tape test [13,16-20] Abrasion test [18,21] Bend and stretch test [15,22] Shearing stress test [22-24] Direct pull-off method [15,25-39] Moment or topple test [40-43] Electromagnetic tensile test [44] Laser spalation test [45] Ultracentrifuge test [13,22,46-50] Ultrasonic test [13,76] Peeling test (13, 51-54] Tangential-shear test [55,56] Scratch test [50,52, 57-73]... 

One simple qualitative test method is the scotch-tape test. In order to carry out quantitative measurements, however, more precise methods have to be used and existing commercially available measuring units are of use. Some of these methods are discussed in detail in the following sections. Additional information can be found, for example, in [105]. 

The principal aim of the present work was to study the modification of polymer surfaces by plasma treatment as well as the interaction of a metal film with these treated surfaces by surface analytical techniques. As shown above, the results indeed show increased interaction after surface treatment under certain conditions. However, ultimately, improved adhesion should also be observed. For this purpose preliminary expenments with aluminum films on plasma treated polypropylene were carried out. These films were not evaporated under in-situ conditions, but in a separate electron beam evaporator under identical conditions for the different polymer surfaces. A simple Scotch tape test was performed in order to characterize the adhesion qualitatively. In agreement with the surface analytical results, the as-received polypropylene surfaces show poor adhesion as the aluminum film and can be peeled off completely. A five second nitrogen plasma treatment however leads to a film which adheres well and cannot be lifted off by the same tape. Hnally, a 120 s ocatment in a nitrogen plaana leads to an oveitreatmcntof the surface characterized by a low adherion again. 

Scotch-tape" test A method of evaluating the adhesion of a lacquer, paint, or printed label to a plastic substrate. Pressure-sensitive adhesive tape is applied to an area of the painted plastic article, which may first be cross-hatched with scored... 

As noted earlier and readily seen by the complexity of variables, adhesion testing is a very inexact science. Many tests have been devised in order to characterize the adhesion property. These include both qualitative and quantitative test methods. Examples of qualitative tests are the Scotch tape test and razor blade tests which certify that the adhesion exceeds some... 

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