Filter Pressure Value (FPV): Definition, Calculation & Control 1. Definition & Calculation FPV (Filter Pressure Value) quantifies the ease of polymer melt flow through filters under standardized conditions, measured by pressure increase over time. Formula: FPV = ΔP / (S × G) ΔP: Average pressure drop (Pa) S: Effective filter area (m²) G: Melt mass passing
Bicomponent Fiber is a type of fiber formed by combining two distinct polymers or components with differing properties of the same polymer through specialized spinning processes. Its key advantage lies in integrating the characteristics of both materials, thereby endowing the fiber with superior comprehensive performance or specialized functionalities. Below is a detailed introduction to bicomponent fibers:
Polyester Chips: The Versatile Foundation of Modern Industry Polyester chips are the chameleons of the chemical industry. Synthesized through the polymerization of Purified Terephthalic Acid (PTA) and Ethylene Glycol (EG), they play a critical role in modern manufacturing. Despite sharing a common origin, these chips are categorized into Fiber-Grade, Film-Grade, and Bottle-Grade based on downstream
PET (Polyethylene Terephthalate) Chips Introduction Definition and Production Process PET chips refer to polymerized raw materials generally processed into flake-like granules of approximately 4×5×2 mm. Production routes include: Direct Esterification (PTA Process): Dominant since the 1980s due to 20-30% lower raw material consumption and 40% shorter reaction time versus alternative methods. In China, nearly all manufacturers now use
