Do you have an adhesive for bonding to polypropylene/polyethylene?
FORMOA 066 & FORMOA Primer can bond very well to PP and PE. PP and PE are plastics with low surface energy, typically below 38 dyne’s. Dyne’s is the unit of measurement for surface energy. A substrate can be broadly deemed as bondable if it’s surface energy is above 38 dyne’s. The surface energy of PP and PE can be increased by chemical, flame, plasma, crona treatment etc. If a flexible bond is required, FORMOA Primer PP is an excellent chemical primer which improves adhesion and thus overall performance.
What is open time, handling strength and full cure?
Open time is the time frame from when the adhesive is applied to when it no longer bonds to another substrate.
Handling strength is the time it takes for a 25mm x 25mm lap shear joint to reach 0.3N/mm². In simple terms this is the point in which it is no longer possible to pull the joint apart by hand using tensile shear force.
Full cure is the time for the adhesive to reach its ultimate lap shear strength.
At what temperature should I store FORMOA products?
Recommended storage temperatures can be found on each specific technical data sheet. These will generally be quoted as +5°C to +25°C. The ideal temperature however, is +15°C to 25°C.
The latest batch of adhesive seems a lot slower/faster, is something wrong with it?
The temperature and humidity in the environment as well as the temperature of the substrate will have a big effect on the cure speed of an adhesive. The substrate and adhesive should be between + 15°C and 25°C. For every 8°C drop in temperature the cure time doubles and for every 8°C increase in temperature the cure time is half.
Why is the adhesive still wet in the middle?
FORMOA 1K adhesives are moisture curing systems that cure ‘from the outside in’ using atmospheric moisture. Cure is measured in mm/24 hour period. It would therefore not be expected for a 20mm wide bond to be fully cured and dry all the way through after 24 hours.
Presentation: Introducing our capabilities and team – important chemistry.
Consultation: If we had a magic wand, what problem would you like us to solve?
Auditing: A deep dive into operation and plant processes to identify issues and causes.
Testing: Substrates and panels etc back to our lab for adhesive and application testing.
Analysis: Processing our findings from audits and testing.
Prototyping: Working with our client on initial solutions, joint design etc.
Trialling: Thorough testing of concepts on client products in real life application scenarios.
Proving: Ironing out teething problems and streamlining processes to ensure efficacy.
On-boarding: Customer services team take over the day-to day care of client needs.