In the composites industry, fibers are an important topic, but rarely mention fiber infiltration agents. However, it is no exaggeration to say that the infiltration agent is very important. Without it, fibers will soon wear and tear in processing and processing, and hinder the combination of matrix resins. In addition, the infiltration agent is related to improving mechanical properties, such as tensile strength and impact resistance, anti-fatigue and chemical resistance, can also improve thermal stability and hydrolysis stability and so on.
The infiltration agent is protected by patents, but is critical for performance. The infiltration agent protects the fibers from abrasion or breakage during the process of initial production and downstream weaving, and ensures the adhesion of the fibre/resin interface.
The largest consumer of invasive agents is fiberglass manufacturers. According to Professor James L. Thomason of Strath University of Leicester (UK Glasgow), the production of fiberglass composites around the world reaches nearly 9.07 million tons per year, and the glass fibre is about 95% percent of all fibre-reinforced materials used in the composites industry.
PPG Industry is one of the world's largest fiberglass manufacturers. It uses silica sand (SiO2) and other raw materials to melt in a melting pot of 1450 ° C, forming glass fibers through a leaky plate. The filament is coated with the infiltration agent immediately after pulling out of the leaky plate. "We painted about 100 nm thick infiltration of cylindrical surfaces in diameter of about 10-20 μm," The wire drawing is approaching 100 miles per hour (160 kilometers), "James C, vice director of fiberglass technology, PPG," explains Watson, "We have 24 hours a day, one weeks 7 days, one years 365 days in production, never stopped." "This is a small challenge," he joked, pointing out that the infiltration must be kept on the fibers after being used, and that all the subsequent manufacturing processes of fiberglass, the customer's part production process and the end of the part's lifecycle are functioning. He added that in the whole composite, the infiltration agent accounted for only the 0.2-0.3 of the final product, but it would "have an astonishing impact on productivity and component performance."