Break-Through in Flocking Adhesive Technology

For many years a major obstacle to the 3-D fiber coating of low surface energy plastics has been the required use of solvent systems or the need for two-step process to achieve good flocking adhesion. Both require additional costs and have an undesirable environmental impact.

Low surface energy plastics, such as polypropylene and TPO, have traditionally required the use of adhesion promoters (adpro’s) in order to achieve adhesion of flocking adhesives. The adpro’s primary function is to chemically “etch” the surface of the plastic in order to provide greater surface area for adhesives to bond.The adpro’s, available for many years, have been only dispersible in a solvent medium. Therefore, to incorporate into a one-step adhesive system, the adhesive would have to be solvent based. Alternately, if water based adhesive was preferred, adhesive system would consist of a water based adhesive applied over a solvent based pretreat that contained the appropriate adpro.

Recently, chemical engineers have been able to develop adpro’s that can be dispersed into water based systems. However, the formulations considered have only been directed towards paint manufacturing and a great deal of R&D was necessary to develop a suitable adhesive system for flocking.

In late 2016 Nyatex was able to complete a successful formulation for a one-part water based adhesive system for low surface energy plastics. No solvent materials are required and no pretreating step is required. The new system is being offered as a “drop-in” alternative to standard water based adhesives used for interior automotive parts; no additional curing or part prep is necessary. The adhesive system is also low VOC and HAPs free.

The new system went to market in January of 2017 and is currently being used by multiple automotive flocking companies.

For additional information or to inquire about tests samples, contact our office at 517-546-4046!

Jason Hulbert, President
Nyatex Chemical Company