TYPES OF ADHESIVE

TYPES OF ADHESIVE

There are large numbers of adhesive types for various applications. They may be classified in variety of ways depending on their chemistry

• Epoxies polyurethanes polyamides’‎
• Paste, liquid, film, pellets, tap
• Hot melt, reactive, contact etc

1. Structural adhesive; it refers to relatively strong adhesive that are normally used well below their glass transition

2. Pressure sensitive adhesive are very low modulus elastomers which deform easily and small pressure.

3. White craft adhesive: This is the most common craft give for porous light weight material such as paper, cardboard, cloth and kids ‘craft. Water is the carrier; this man easy clean up and low toxicity.

4. Yellow wood adhesive; is also water based and is made of the same vinyl acetate polymers as craft give it is designed to work with wood and is immediately ac for beer hold in the uncured state.

It is also generally more rigid, hence it is easier to sand. Some wood glue can also be white and dry clear. Make sure to read the labels. Again, you can add sawdust or another powdered filler for special effects.

5. Super adhesive (glue it is also known as cyanoacrylate adhesive): cyanoacrylate adhesive bond very quickly and to a range of substrate they form a very strong bond and dry clear.

The surfaces to be mated fit together well to achieve good bonding. You can buy super glues in a variety of viscosities which enable some leeway in gap filling performance.

However, super glue can be finicky with respect to surface contact and coverage- too much or too little can affect the bond. In general, super glues are not good for foamed plastic, unless specified on the bottle. Cyanoacrylates work best in tensile application that have low impact strength requirements.

In their uncured state, you can use an acetone solvent wipe for cleanup. However, once cured, solvents can no longer dissolve the adhesive. Cyanoacrylates work particularly well for balsa wood projects. Carpenters often use a two part cyanoacrylate to quickly bond mitered wood trim. Cyanoacrylates can set in seconds to minutes, depending on formulation.

It dries clear and is waterproof. Bottom line: cyanoacrylates are good for projects involving wood, metal, ceramic, leather, glass, and some plastic where bond line is very tight.

6. Hot Glue Adhesive: The melting and cooling of polymers provides the methods of delivery and adhesive for hot melt adhesive. Hot glue is the most commonly applied using a glue gun and comes in low (250f) and high (380f) molting option.

7. Spray Adhesive: A spray adhesive is a contact adhesive based in a solvent that is applied by spray. When using spray adhesives, it is important that you apply in a well-ventilated room. After spraying your project allow the solvent to completely evaporate before mating for immediate bond once mated, you cannot reposition your substance. Spray adhesive can be used with paper, foam bond.

Fabrics, photo, and felt. Specialty contact adhesives are also available in a control or brush on for larger, more demanding projects that involve wood, metal, and plastics sheet laminates.

Application example spray adhesive are an excellent choice for adhering photo or fabrics to a foam board back.

8. Fabric Adhesive: Can be liquid white glues lie polyvinyl acetate (PVA) types.

A variety of products cover light weight to heavy weight fabric bonding, so it is important to get the correct product to make the hand or drape of your project. Some versions are safe for washing and dry cleaning, but it’s important to read the glue’s label first.

9. Epoxy: Epoxy are generally two part systems designed for high performance bonding. While epoxies can be formulated to suit many applications, they are generally very hard, durable adhesive that bond too many substances successfully in more extreme environment.

Epoxy adhesives can exhibit a range of flexibility and clarity as well as cure speed. Epoxies have excellent gap filling properties due to their high cohesive strength.