In 1968, the company built a new plant in Chesterfield, Missouri and developed an innovative extrusion process to produce expansion tubes for Combustion Engineering’s use in nuclear power plant construction. That same year, Tetra engineered a process that applied hot melt adhesive to a square tube used as wing sticks on plastic kites.
In 1972, Tetra became the only U.S. company to successfully develop and manufacture plastic top surface, sidewall, internal parts, and base materials for the production of snow skis. Previously, all materials were supplied from Europe. The company also developed the original pre-decorated ABS plastic top for fiberglass water skis.
In 1981, Tetra began work with NIKE to develop the NIKE Airsole® cushioning system. A proprietary extrusion process was developed by Tetra engineers to produce the polyurethane film for the original Airsoles® used in the early 1980s. In 1986, the company developed another proprietary process for production of a heel cushioning Airsole® that was visible through windows in the shoe. In 1991, Tetra developed a proprietary blow-molding process that produces an air system totally visible in the heel and creates maximum cushioning. Tetra was the only supplier of Airsole® cushioning materials to NIKE worldwide.