ENGINEERED PAINT BOOTHS & FINISHING SOLUTIONS
Published

Coating Fabric

Is there a pretreatment that would allow better adhesion of moisture curing polyurethane (for water proofing) to woven nylon or crystalline polyurethane fabric?

Share

Q. I am currently coating cotton fabric with a moisture curing polyurethane for water proofing and abrasion resistance. I would like to switch to woven nylon or crystalline polyurethane fabric but have not been able to get good adhesion. I don’t want to use a two-part polyurethane. Is there a pretreatment that would solve this problem? P.E.

 

A. Most fabrics have a coating called sizing applied at the mill. The sizing on your cotton obviously accommodates the polyurethane coating. On the other hand, the sizing on the woven nylon and crystalline polyurethane fabrics may not and therefore acts as an interference coating inhibiting adhesion of the polyurethane coating.

You can try another supplier of the fabrics, hoping they use a compatible sizing. Another approach is to ask the fabric suppliers what sizing they use and then apply a tie-coat as a primer before the polyurethane. You could also ask for a fabric having a compatible sizing.
 

Related Content

  • Coatings Plant Evolves with Market Trends

    Expanding its focus from exclusively serving the RV industry, one of this company’s stand-alone coatings plant has successfully extended its services to additional markets.

  • Curing Oven Basics

    Simply heating up the substrate does not cure the coating. There are many variables to consider when choosing the best cure oven for your application...

  • Concrete Reinforced Bars Built to Last

    Not all corrosion-resistant materials for infrastructure are created equally. Epoxy-coated steel rebar has advantages that other materials used to prevent corrosion do not. 

Your Best Finish Starts With Us!
Precision gear pumps
ENGINEERED PAINT BOOTHS & FINISHING SOLUTIONS
Filtration Systems
Gardner Intelligence
PMTS 2025 Register Now!
New Acid-Free Bright Nickel Process
Metal Pretreatment Technology
ENGINEERED PAINT BOOTHS & FINISHING SOLUTIONS