Planes, Stains, and Automobiles!
How OEM’s are conquering stain protection with lacquers on vinyl upholstery
Preface: Stain resistance on flexible vinyl substrates is a daily topic in the laboratory at APV Engineered Coatings. The type of stain resistance required varies by market and end-use. APV takes a customized approach to develop primer and topcoat lacquer systems that provide our customers with the performance properties they desire. Airplane upholstery, automotive seating and mass transit fabrics are challenged with these unforgiving stains (think foods like coffee, mustard and ketchup to chemicals like cleaners, permanent marker and blue jean dye) challenging the longevity of the fabric in everyday use.
The substrate to lacquer relationship

Coffee stain beading up on fabric treated with a Vynguard® performance lacquer.
Testing stain performance

Close-up of denim dye stain on PVC automotive
upholstery.
How do you know how well a lacquer chemistry on flexible PVC performs against stains? Stain resistance can be tested in a variety of industry-standard and rudimentary ways to identify effectiveness of the finish. It’s important to understand its initial effectiveness as well as lifecycle performance prior to commercializing a lacquer chemistry. It’s also important to test the key stains the upholstery will undergo when in use.
The automotive OEM’s have created their own test methods to evaluate a lacquer system’s effectiveness in preventing the ingress of denim stains to the fabric. Some tests use dry denim and some with wet (water) denim and then evaluate the color change on the fabric. ASTM D4966-98 Martindale Abrasion Test is just one example of this type of stain test.
Conclusion
The industrial fabrics industry has consistently evolved into a performance-driven market where the lifecycle of commodity vinyl is being challenged and functional ingredients are coming under increased regulatory scrutiny. A laboratory meeting about planes, trains and automobiles isn’t just a movie reference at APV Engineered Coatings’ Akron, Ohio manufacturing facility. Its technical team is always developing new approaches for novel and complex lacquer chemistries that work with the vinyl to protect against some of the harshest stains in the environment.
About the Author
John Russell, Vice President AND Technical Director of APV Engineered Coatings, has 25 years of expertise in the chemical and coatings industry. He is highly specialized in the formulation of advanced chemistries for flexible vinyl, films and textiles. Throughout his career, John has successfully commercialized newto-market formulations with properties such as anti-graffiti, hydrophobic and hydrophilic functionality and superior weathering characteristics.