Tape adhesion test

Determined by crosshatched cellophane tape adhesion test (+ is pass — is fail). 

Figure 30.17 Tape adhesion test results at various water boiling times for primer on methane-plasma treated ETA-3183 with six cross-cuts made before and after immersion into boiling water 2 3 torches, 2.0 A arc current, 1000 seem argon, 10 seem methane, 270mtorr pressure, and 1.9 s plasma exposure time.

Removing the PDMS stamp (to which gold has poor adhesion) from the plastic substrate transfers the gold/titania metal from the raised regions of the stamp to the substrate. The entire procedure occurs at ambient conditions with contact times less than 15 sec. Scotch tape adhesion tests further confirm that the transferred patterns are strongly bonded to the substrate. Since aluminum also readily forms surface oxides, the same interfacial chemistry can be used to generate aluminum patterns... 

The adhesion of titania can be tuned by the choice of the ligand. For example, as phenylphosphonic acid can strongly bind the titanium dioxide it results in the deposition of titania films that can pass the Scotch tape adhesion test [101]. 

Scotch Tape adhesion tests of 50 nm Au films on the MPS dipped samples revealed complete removal of the Au. Similar adhesion studies of the refluxed MPS samples demonstrated no removal of Au. We feel that the multilayers... 

There is second shear adhesion test that is now being reported with increasing frequency, the so-called SAFT, or shear adhesion failure temperature test. It is particularly popular among block copolymer PSA developers. In this test [15], a shear specimen with an overlap area of 2.54 cm x 2.54 cm is prepared and suspended in a circulating air oven. A 1-kg weight is attached to the tape and the oven temperature is raised continuously 5.5°C per 15 min until failure. An industry wide standard has not yet been written for this 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. 

An important factor of film quality concerns its adhesion to the substrate, namely to the magnesium chip. Figure 4.12 shows images of different coated chips after a standard adhesion test. The upper images show the magnesium-coated chips after the tape was peeled off, while the lower images show the tapes. 

Figure 4.12 Optical images of coated magnesium chips and their corresponding tapes after an adhesion test (A) PTMOS film (B) ZrTPO film (C) combined film. The images of the tapes are somewhat misleading as the coloured area of the combined film is the largest, which is due to its high content of Rhodamine B. (Reproduced from ref. 13, with permission.)...

The adhesion of the UVC lacquer was tested immediately after radiation with Scotch tape in a "peel back" puU-adhesion test and was evaluated by a... 

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. 

All the coated samples listed in the tables were heated in an oven for 2 hours at 115 °C to ensure the removal of all solvent. Drying at room temperature, however, was sufficient for many of the coatings to pass the cellophane tape test. The cellulose acetate butyrate blends with 1% of each of the four carboxylated polyesters in Table II, for instance, passed the adhesion test on steel after the coatings had dried at 23 °C for only 0.5 hour, and the blends with 1% of the polyesters having acid numbers of 39-126 passed the adhesion test on aluminum. 

Test Method for Adhesion in Peel of Elastomeric Joint Sealants Recommended Practice for Surface Preparation of Concrete for Application of Chemical Resistance Resin Monolithic Surfaces Method of Testing Release Papers Used with Preformed Tape Sealants Test Method for T-Peel Strength of Hot Applied Sealants Test Method for Tensile Adhesive Strength of Preformed Tape Sealants by Disk Method... 

In the case of direct application of E-coat to IVD specimens (one of the systems that showed excellent adhesion performance in both the tape test and the accelerated adhesion test), due to the high throw power of the E-coating process, the deep penetration of E-coat into the porous IVD structure creates mechanical interlocking and thus strong adhesion. Because of this development of mechanical interlocking, neither the tape test nor the accelerated adhesion test could distinguish the effect of plasma treatment on adhesion performance. 

Adhesion for PADS-based siloxane polyimides was obtained over a range of comonomer compositions. The spun-on "PADS coatings generally had to be annealed at 300°C to impart adhesion to silicon. In at least one series of copolymer compositions, the PADS content could be decreased to 10 mole % while maintaining adhesion to silicon as determined by the Tape Peel Test. 

This test method is preferably used for the comparative evaluation of adhesives and surface pretreatment methods, since it enables the indication of the differences in the adhesive and cohesive behavior of the adhesive layers with high sensitivity. Pressure-sensitive adhesives (adhesive tapes, adhesive labels) are also tested according to this principle. 

Print adhesion on plastics (and foil) is normally checked using a self-adhesive tape peel test. A few inches of a suitable standard tape is firmly pressed onto the print area then pulled off, slowly at first, then more rapidly. An assessment of print adhesion can be made from the quantity (ideally none) removed. Adhesion can vary according to the type and colour of the ink, the degree of pretreatment, the surface involved and the printing process, etc. In order to test print under likely use conditions, product immersion tests may be necessary 60°C (140°F) is a frequently used condition, for 3 to 6 h. If product-pack may be used with soapy hands, a solution of soap can be employed. A print adhesion test, as above, can then be carried out, on the washed material, after it has been cooled to room temperature. 

It should be mentioned that the adhesion of the copper deposit to a very thin PVD copper layer passed all the tape-pulling tests. 

It is assumed in almost all cases, that any pressure-sensitive adhesive to be tested has already been applied to a flexible carrier, which is either in tape form, or which can be cut into tapes for testing, virtually all test methods making this assumption. If this is not the case, then it would be necessary to coat the adhesive onto a suitable flexible carrier, usually 25 pm polyester film, which may need to be suitably pre-primed, the prime coat used depending on the adhesive type. The coat weight chosen should be that used for the practical application of that adhesive, or if this adhesive is still under development, then a series of coat weights can be run, to determine which provides optimum performance. An exponential relationship will be found between coat weight and resulting adhesion. 

Adhesion testing of double-sided tapes is achieved by applying a 25 pm polyester film of suitable width to one side of the tape, then carrying out a standard adhesion test on the... 

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