Surface preparation tapes

After the cleaning process, other techniques are used to prepare the surface of the substrate for coating. Some techniques include drying, surface etching, and chemical surface preparation. Examples of chemical surface preparation include the formation of an oxide layer or the monolayer assembly of an adhesion promoter on the surface. These processes modify the surface of the substrates so as to facilitate the subsequent deposition process. In surface preparation, frequently, the hydrophilic/hydrophobic character of the surface is controlled to match the coating solution properties. For example, Van Driessche et al.19 reported on improving the wettability of Ni-4at%W tapes... 

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... 

Polyethylene tape. There are more than 30 y of experience with polyethylene tape. It has been applied over the ditch, at the railhead, and in the shop. Surface preparation, an indispensable element in proper coating adhesion, is very difficult in an over-the-ditch operation. The generally poor performance of over-the-ditch tape applications has caused most pipeline companies to abandon them. Occasionally, however, one still hears of a pipeline company that has used its own highly trained crews and has obtained a good over-the-ditch application. 

Surface-assisted laser desorption/ionization (SALDI). SALDI is a matrix-free approach for the analysis of low-mass molecules. In this innovative approach, the sample solution is placed directly onto a solid surface prepared by depositing an active material, such as powdered graphite, active carbon, carbon nanotubes, or silica sol-gel, onto a suitable substrate (e.g., A1 foil or Cu tape) and bombarded with a laser beam [47,48,60]. 

EE and PIE from pulling adhesive tape from solid surfaces, measured in vacuum is significantly different from the phE in air. We surveyed the charged particle emission from the peeling of 3M Magic Transparent Tape from a number of surfaces. The surface preparation consisted only of cleaning in acetone - no attempt was made to remove natural oxide layers or other contaminants that would not be removed with acetone. The surface area created by peeling 2... 

Despite the copious evolution of phenol and water during processing, Narmco s commercial adhesive system (Imidite 850) was based on prepolymer 28 mixed with aluminium powder, inorganic arsenic compounds such as arsenic thioarsen-ate or arsenic pentasulphide, and sterically hindered polyphenol antioxidant. Adhesive tapes were manufactured hy hot-melt deposition of this mixture on a 112-type glass cloth carrier used in conjunction with a heat-resistant primer (polybenzimidazole or polyimide). As with all other heat resistant polymers, surface preparation of flat and honeycomb metal surfaces is an important factor in... 

Structural Adhesives. Films of nitrile rubber/phenolic resins (i.e. tapes) have been employed in the aircraft industry for bonding metal to metal surfaces in both plain and honeycomb sandwich constructions. Several Wright Air Development Center reports " describe in detail the preparation of a nitrile rubber/phenolic resin tape, the metal surface preparation methods, and the methods of evaluating structural adhesives of this type. A formulation for a high-temperature liquid phenolic resin adhesive suitable for structural fabrication is given in Table 21. ... 

Quartz fine aggregate and normal Portland cement were used to prepare mortar with a w/c of 0.5. A cylindrical specimen, 43 mm in diameter and 50 mm long, was cast and cured under sealed conditions for 3 days at 23 °C. The specimen was then oven dried at 105 °C for 1 day prior to exposure to lithium nitrate solution. The specimen was then placed such that the bottom of the cylinder was submerged approximately 1-2 mm into a lithium nitrate solution with Teflon tape applied to the curved surface. 

A section of the epoxy sample, approximately 2cmx2cm, was removed from the bulk and mounted onto the XPS sample stage. The sample was mounted with the "titanium" side facing down, by way of double-sided tape. Thus, the "composite side" was analyzed. The composite tube was prepared similarly and the sampling area was selected so as not to include the first 5 mm or beyond 30 mm from the end of the tube. The regions in the first 5 mm and the area beyond 30 mm from the end were classified as the non-bonded regions. Thus, the "epoxy side" or outer surface side of the composite tube was analyzed in the "bonded region". 

Surface characterization studies by X-ray photoelectron spectroscopy (XPS) were conducted using DuPont 650 and Perkin Elmer 5300 instruments. Samples were prepared by placing solid material on double stick adhesive tape, or by allowing solvent to evaporate from an acetone dispersion of a suspension placed on a stainless steel probe. A magnesium anode was used as the X-ray source (hv 1253.6 eV). The temperature of samples during the analysis was approximately 30-40°C and the vacuum in the analysis chamber was about 10 torr. Potential... 

---