Adhesive sticks

The idea of adhesive sticks was probably derived from the ladies lipsticks the adhesive sticks are made with a gelled formulation, with a consistency similar to that of a lipstick, and it can be applied easily on paper for office jobs. 

This shows that the best new ideas may come from other industries and other techniques food industry (pasta and noodles machines), cosmetics, cooking, plastics (extrusion in various shapes), potting, printing, painting, etc. 

There are also hot melt adhesive sticks, that may be applied cleanly with hand guns (refer to previous Fig. 19). 

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Experimental results of cPBD adhesion stick and receptor concentration effects... 

Patel SD, Chen CP, Bahna F, et al. Cadherin-mediated cell-cell adhesion sticking together as a family. Curr Opin Struct Biol 2003 13 690-8. 

Adhesion, sticking, picking, and filming on punches and dies can in many cases be avoided by a suitable surface finish of the tooling. In some cases, the surface is smoothened during continuous use of punches, whereas in other cases, depending on the material compressed, e.g., in the case of crystalline lactose, small scratches may occur on the punch tips after a few thousand compression events. On those small scratches and defects in the surface, corrosion will start. 

Now it s time to decorate your terracotta pot. Using the mosaic tile adhesive, stick pieces of your broken pottery, stones, and pebbles all over the outside of your pot. Take care not to cover the hole on the bottom. Be sure to wear your gloves so that you re not cut by the broken pottery. 

The microscopy revealed large films of polymer particles attached to the transferred film surfaces. It was found out that these particles might have been resulted from the adhesive sticking between the transferred films and the polymer. In terms... 

Figure 15 shows a comparison of various destructive detachable joining technologies. The progress in plastics engineering has had positive effects on the engineering of new adhesives. Sticking is often... 

In Chapter 3, theoretical aspects of adhesion are reviewed with the object of discussing why adhesives stick, before addressing practical aspects of the surface pretreatment of a number of common construction materials, It is shown that merely establishing interfacial contact between adhesive and adherend is often not sufficient in itself to ensure satisfactory performance. Particular, and sometimes elaborate, pretreatment procedures are found to be necessary for maximising joint durability, and this subject is further elaborated in the following chapter. 

When two materials are bonded the resultant composite has several constituents and interfaces, as depicted for example in Fig. 3.2. Being liquid, adhesives flow over and into the surface irregularities of a solid, so coming into intimate contact with it and, as a result, interatomic forces are brought into play. Adhesives therefore join materials primarily by attaching to their surfaces within a layer of molecular dimensions, i.e. of the order of 0.1-0.5 nm. In joints involving metallic or siliceous substrates, the adhesive sticks to the surface oxide layer and not to the solid itself. In simple terms, there is an obvious conflict between having an adhesive material which... 

Adhesive selection and usage considerations from literature sources and/or proprietary software such as CADEPT (Harwell Laboratory), EASeL (Design Council), PAL (Permabond Adhesives), STICK (Lucas). 

Various theories attempt to describe the phenomena of adhesion. There is no general consensus among experts regarding a universal theory that explains why adhesives stick. In-... 

Solutions of natural and synthetic high molecular mass substances in water, e.g., starch, dextrins, casein, cellulose ethers, water-soluble derivatives of poly(acrylic acid), poly(vinyl alcohol), poly(vinyl pyrrolidone) (adhesive sticks). Uses paper, fiberboard. Glutins (glues of animal origin). Uses wood, paper, fiberboard, moistenable adhesive tapes. 

Figure 8. Hand gun for hot-melt (system lang) a) Adhesive stick b) Feeding c) Retaining ring d) Seal e) Melting chamber f) Nozzle g) Wedge heater or heating wedge h) TVigger...

The last two items of the earlier list involve the behaviour of primers, in part chemical, in part physical, as forms of adhesives sticking the bulk adhesive to the actual metal, wood or other adherend. When dissimilar materials are to be joined, an adhesive suitable for one may not be so for the other. In these circumstances a primer for one of the substrates is chosen to be both suitable for it and compatible with the adhesive. Phenol-formaldehyde condensation products are often thus used particularly when the adhesive itself contains such material dispersed in another polymer, e.g. Redux775 (Bonded Structures, Ltd) or various epoxy-phenolic or nitrile-phenolic adhesives. Most important members of the class of coupling agents are the reactive silanes (siloxanes) and titanates. These materials have achieved their main use in the treatment of glass fibres for the manufacture of glass reinforced plastics. 

It is now generally recognised that adhesives stick to surfaces by one of (or a combination of) four different methods (Figure 10.6) and these methods are discussed briefly here but more detail can be found in references [2] and [4]. 

Figure 10.6 Four methods by which an adhesive sticks to a surface...

Figure 2. Robots thatworkwith chemical adhesion (a) (Daltorio, etal, 2006) adhesion stick and (b) (Unver, etal, 2006) elastomer adhesives...

Figure 3. (a) Robot with electro-adhesive flaps (Prahlad, et al, 2008), adhesion stick and (b) gecko robot (Kim, etal, 2008 Unver, etai, 2006)... 

This is the case of a simple butt joint where the load is tending to separate the two parts at right angles to the plane of the adhesive. The strength of the joint depends on (a) how well the adhesive sticks to the substrate and (b) the tensile strength of the cured or set adhesive. 

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