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Changing Materials or Conditions
The Adhesive Worked Before. Something Changed.
A familiar adhesive may stop performing when the materials, equipment, environment, production speed, or finished-product requirements change.
Manufacturers often experience adhesive problems after a change that initially appears unrelated to the adhesive.
A new paper supplier, increased recycled content, a different coating, faster equipment, colder materials, a modified package design, or a customer's new performance requirement can change what the adhesive must accomplish.
The adhesive may be the same. The application is not.
What Changed?
Changes that can affect adhesive performance include:
Paper, board, film, plastic, foam, wood, metal, or other substrates
Increased recycled content
New coatings, inks, treatments, or release characteristics
A different substrate or raw-material supplier
Changes in porosity, moisture, surface energy, or surface condition
Faster or slower line speeds
Reduced adhesive coat weight
New or modified application equipment
Changes in compression pressure or duration
Different drying or curing conditions
Hotter or colder production environments
Seasonal temperature or humidity changes
Different storage or distribution conditions
Modified product or package designs
New customer performance specifications
Even relatively small changes can affect wetting, penetration, tack, open time, set speed, drying, cure, compression, or finished bond strength.
HAR begins by understanding what changed and what the adhesive now needs to accomplish.
Depending on the application, the solution may involve selecting a different adhesive, adjusting the existing formulation, changing application conditions, modifying equipment settings, or correcting another part of the process.
Did the adhesive problem begin after a material, equipment, or production change?
Why Manufacturers Contact HAR When Materials or Conditions Change
A long-running adhesive suddenly stopped performing consistently.
A paper, board, film, plastic, coating, or other substrate has changed.
Increased recycled content is affecting wetting, penetration, set, or finished bond strength.
A new raw-material supplier has changed production performance.
Faster line speeds have changed available open time, drying time, or compression time.
Seasonal temperature or humidity changes are creating inconsistent results.
New equipment or application settings have changed the amount, pattern, or temperature of adhesive being applied.
A customer has introduced a new specification or more demanding finished-product requirement.
A more sustainable or lower-cost material needs to be qualified without sacrificing bond performance.
The manufacturer wants help identifying what changed before simply replacing the adhesive.
