What Materials Can Be Used with Adhesives?

What Materials Can Be Used with Adhesives?

Adhesives, also known as bonding agents or adhesives, are chemical substances that firmly connect two or more surface-treated adhesive materials and possess a certain degree of mechanical strength. Examples include super glue,  epoxy resin, copper oxide phosphate, silicone sealant and white glue.

Materials that can be bonded by adhesives:

• 1. Metal
• The oxide film on the metal surface is easy to bond after surface treatment; since the linear expansion coefficients of the two phases of the metal bonded by the adhesive are too different, the adhesive layer is prone to internal stress; in addition, the metal bonding area is prone to electrochemical corrosion due to the action of water.

• 2. Rubber
• The greater the polarity of the rubber, the better the bonding effect. Nitrile-butadiene rubber (NBR) has a high polarity and strong bonding strength, while natural rubber, silicone rubber, and isobutyl rubber have low polarity and weaker bonding strength. Furthermore, the rubber surface often contains release agents or other released additives, which can hinder bonding.

• 3. Wood
• Wood is a porous material that absorbs moisture easily, causing dimensional changes and potentially leading to stress concentrations. Furthermore, polished wood surfaces bond better than rougher wood surfaces.

• 4. Plastics
• Plastics with high polarity have good bonding properties.

• 5. Glass
• From a microscopic perspective, the surface of glass is composed of countless uniformly uneven areas. Use an adhesive with good wettability to prevent air bubbles from forming in these areas. Furthermore, glass's predominantly Si-O-carbon structure makes its surface susceptible to water absorption. Due to the high polarity of glass, polar adhesives readily form hydrogen bonds with the surface, creating a strong bond. Glass is also brittle and transparent, so these factors should be considered when selecting an adhesive.

PP material is a non-polar material with low surface energy. When performing gluing on the surface of PP material, it is easy to have problems such as poor adhesion between the substrate and the glue, resulting in degumming. Coating Online tells you that an effective solution is to pre-treat the surface of the PP material effectively. In addition to basic cleaning, use PP treatment agent to brush between the substrate and the glue to enhance the adhesion and solve the degumming problem.