| abstract |
(57) [Problem] To provide a method for producing a glass fiber wound body capable of reducing migration of a glass fiber sizing agent during drying. SOLUTION: a step of obtaining a glass fiber filament; A step of applying a glass fiber sizing agent to a glass fiber filament, a step of bunching the glass fiber filaments coated with the glass fiber sizing agent to obtain a glass fiber bundle, and winding the glass fiber bundle without twisting Winding the tube into a square end to obtain a wound body, and drying the wound body to obtain a wound body of a glass fiber bundle coated with the non-volatile component of the glass fiber sizing agent. A method for producing a wound glass fiber body, wherein the sizing agent for glass fiber is a sizing agent containing starch, an ammonium sulfate compound, a lubricant, an emulsifier, and water. |