<P> The extreme temperature of dry ice can cause viscoelastic materials to change to glass phase . Thus it is useful for removing many types of pressure sensitive adhesives . </P> <P> Dry ice can be used for loosening asphalt floor tiles or car sound deadening material making it easy to prise off, as well as freezing water in valveless pipes to enable repair . </P> <P> One of the largest mechanical uses of dry ice is blast cleaning . Dry ice pellets are shot from a nozzle with compressed air, combining the power of the speed of the pellets with the action of the sublimation . This can remove residues from industrial equipment . Examples of materials removed include ink, glue, oil, paint, mold and rubber . Dry ice blasting can replace sandblasting, steam blasting, water blasting or solvent blasting . The primary environmental residue of dry ice blasting is the sublimed CO, thus making it a useful technique where residues from other blasting techniques are undesirable . Recently, blast cleaning has been introduced as a method of removing smoke damage from structures after fires . </P> <P> Dry ice is also useful for the de-gassing of flammable vapours from storage tanks--the sublimation of dry ice pellets inside an emptied and vented tank causes an outrush of CO that carries with it the flammable vapours . </P>

Name the type of binding force in dry ice