Technical Information on Felts & Tapes
Glossary of terms commonly used within the tape industry.

1. Abrasion resistance. The ability of a tape to withstand rubbing and friction and still function satisfactorily.

2. Adhesion. The state in which two surfaces are held together by inter-facial forces; e.g. bond formed by contact between an adhesive and a surface.

3. Adhesion to self. Force required to remove tape when applied on top of itself.

4. Adhesion to steel. Force required to remove tape from a steel plate.

5. Application temperature. The temperature range at which the tape may easily be applied off the roll.

6. Breakdown voltage. The voltage at which a pin hole will be made in the tape.

7. Breaking load. The force required to break a unit width of tape under prescribed conditions.

8. Clean peel. A tape which can be removed after application, without leaving a residue behind.

9. Conformable. The ability of tape to fit snugly or make essentially complete contact with the surface of an irregularly shaped object without creasing or folding.

10. Easy tear. Little force required to tear the tape width ways.

11. Easy unwind. Little force required to unroll the tape without stretching or tearing it.

12. Electrical strength. The voltage at which breakdown of tape occurs under the prescribed conditions of test, divided by the distance apart of the two electrodes between which the voltage is applied.

13. Electrolytic corrosion. A reaction can occur when dissimilar metals are in contact.

14. Elongation. The amount of tape that has stretched length wise at the point of breaking. It is expressed as a percentage of the original unstretched length.

15. Flame resistance. The ability of a tape to withstand exposure to flame. Fireproof materials will not burn when exposed to a flame.

16. Flame resistant. (Fire retardant, self-extinguishing) materials will burn when exposed to flame but not continue to burn after the flame is removed.

17. Flame retardant in Situ. The ability of a tape to withstand exposure to flame once it has been applied.

18. Flexible. The ability of a tape to be freely bent or flexed during application, particularly applicable to low temperature use.

19. Heat resistance. The ability of a tape to withstand a specified temperature under well defined conditions.

20. Insulation resistance. The ability of a tape to prevent the flow of current across the surface of the backing.

21. Moisture vapour permeability. The rate at which a tape will allow water vapour to pass through a given area of tape.

22. Non-corrosive adhesive. An adhesive which does not chemically attack the surface it is in contact with.

23. Pressure sensitive adhesive. A type of adhesive, which is permanently tacky at room temperature and when applied to a variety of surfaces, forms an immediate bond. The bond strength may be increased by pressure an/or time.

24. Pressure sensitive tape. A term used to describe a category of tape coated on one or both surfaces with a pressure sensitive adhesive.

25. Printable. The ability of a tape to accept and hold a printed legend and especially to resist off-setting of the print when unwound from a roll.

26. Release paper. A removable material which protects the adhesive face or faces of the roll of tape.

27. Removable. Ability to remove the tape from the substrate without damaging or contaminating the substrate under specified conditions.

28. Re-positionable. Ability to remove the tape from the substrate without damaging or contaminating the substrate under specified conditions, yet retaining bond strength when re-applied.

29. Resistance to ageing. The ability of a tape to withstand normal exposures, after application, and to perform satisfactorily.

30. Resistance to oils, grease, solvents. The ability of a tape to resist exposure to such chemicals after application, and to perform satisfactorily.

31. Service temperature. The temperature at which the tape will continue to give satisfactory results once applied.

32. Shear strength. The ability of the adhesive to resist force applied in the same plane as the tape.

33. Substrate. The surface to which the tape is applied.

34. Tack. The property of an adhesive tape that causes an instant bond, with measurable force, by the touching of the adhesive and a substrate without externally applied pressure.

35. Thermosetting adhesive. An adhesive which becomes firmer on heating and remains so on cooling. Thermosetting of adhesive improves solvent resistance and increases softening temperature.

36. Thickness. The perpendicular distance between two opposite surfaces of a complete tape. (excludes release paper where applicable)

37. UV Stable. The ability of the tape to resist exposure to UV rays after application and to perform satisfactorily.

38. Waterproof/Water resistant. The ability of the tape to resist these elements with affecting the tape bond.

39. Weather resistant. The ability of the tape to resist exposures to specified conditions after application and to perform satisfactorily; these conditions are usually cold; water and UV.
 
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