What Makes Tapes Adhesive To Surfaces
We use tapes all the time without ever devoting much thought to them. Simply open the tape packaging, find the end and pull it out for a quick application. It is only when they fail to hold up or keep together 2 surfaces for a substantial period of time that we start to wonder why it has not worked. Actually, there is much more than meets the eye when it comes to adhesive tapes.
In this article, we will be exploring how an adhesive tape is able to stick to a surfaces and the different types of adhesive tapes available. By understanding this, you will understand why adhesive tapes don’t work in all situations and how to better use them.
How Are Adhesive Tapes Applied
Adhesive tapes can be force sensitive, thermally triggered or may also need moisture to work. Others, such as latex gums, adhere to themselves. Most of us have seen how adhesive tapes are applied with force or the effect that a hair dryer applying dry heat to it can have. These are real life examples of the concept that we have just mentioned.
How do Adhesive Tapes Stick to Surfaces
There are 2 basically different parts of tape’s sticky property; adhesion and adherence. Adhesion is the sticking force between two different materials, whereas cohesion is the binding force between two comparable materials.
When two products are brought into contact with one another, the surface molecules interact, giving rise to eye-catching forces that may be physical, electrostatic or chemical (corresponding to adsorption, covalent bonding or van der Waals forces, respectively).
When the molecules are comparable, as when it comes to two ‘glue molecules,’ the cohesive pressure causes the adhesive to stick to itself. When the particles are dissimilar, as when it comes to a glue molecule and a particle of the substrate (the surface the glue is sticking to), the adhesive pressure holds the glue to the substrate.
For this reason, the ‘stickiness’ of tape is caused by a combination of the molecular forces of the adhesive material adhering to itself along with keeping onto the substrate.
What Types Of Adhesives Are Used For Tapes?
Selecting the appropriate adhesive for your job requires a better understanding of the application and backing or carrier being utilized.
- Acrylic adhesives provide outstanding ecological resistance and provide a quicker setting time than various other adhesives.
- Epoxy materials exhibit high durability and modest shrinkage during curing and are known for their toughness and resistance to chemical and environmental damage.
- Rubber-based adhesives provide extremely flexible bonds and are typically based upon butadiene-styrene, butyl, polyisobutylene or nitrile compounds.
- Silicone adhesives and sealants have a high level of flexibility and are unassailable to very high temperatures.
- Polyurethane and Isocyanate adhesives provide more versatility, resilience, impact, and resistance.