Properties and Applications of Polyolefin Bonding
Polyolefins are very difficult to bond on account of their non-polar, non-porous and chemically inert surfaces. In order to meet the needs of plastic companies, Master Bond has developed adhesives to bond polyolefin substrates without surface pretreatment. These systems are convenient to apply, feature long-term durability and save time and energy.
Traditional Approach to Bonding Polyolefins
The high degree of chemical inertness found in polyolefins generally limits the usefulness of solvent bonding as a viable assembly technique.
One successful approach to adhesive bonding of these materials involves proper surface pretreatment prior to bonding. The pretreatments which are widely accepted include chemical etching, flame treatments, corona discharge and gas plasma.
Following any one of these surface pretreatments, an appropriate epoxy, polyurethane, silicone or other adhesive system can be used depending on the type of service environment the adhesive would be exposed to.
Some of Our Most Popular Bonding Systems for Polyolefins
- One part, solvent based system with excellent adhesion to most polyolefins and flexible PVC. Also available as a Class VI medical grade system called X17Med. Particular affinity for bonding smaller sized pieces. Excellent resistance to water and various sterilization techniques.
- Rapid curing hot melt system specially formulated for adhesion to polyolefin plastics. Requires special dispensing units as the hot melt is “pillow shaped”. 100% solid system, contains no solvents.
- One part, water based pressure sensitive system with high affinity for polyolefins. Simple to use, environmentally safe and good strength.