Baking method for low-temperature fiber film forming

Abstract

The invention discloses a fiber low-temperature film-forming baking method, which comprises three continuous stages of baking: in the first stage of baking, the temperature is raised to 55-95 DEG C, and the temperature is kept for 1-4 hours; the second-stage baking conditions are as follows: the temperature is continuously increased to 95-110 DEG C, and heat preservation is performed for 3-5 hours; and the third-stage baking condition is as follows: cooling to room temperature, and taking out for later use. According to the baking method for low-temperature fiber film forming, the fiber film forming uniformity, the interface bonding strength and the yarn stiffness and drapability can be greatly improved, the mechanical strength of the impregnated yarn is improved, the performance dispersion of the impregnated yarn is reduced, the application value of the fiber in the fields of weaving, plying, compounding and the like is improved, and the application prospect is wide. And a new technical approach is provided for high-quality fiber production.

Description

technical field [0001] The invention relates to the technical field of fiber production, in particular to a baking method for low-temperature film formation of fibers. Background technique [0002] High-strength fiber is an important reinforcing phase of advanced composite materials. Its flexibility is crucial to the application of fibers in weaving, plying, and compounding. It can enhance the smoothness of weaving, reduce the loss rate of plying strength, and improve the bonding of composite interfaces. Among them, the baking method of low-temperature film formation is the key technology to realize the production of flexible fibers, which has an important impact on the properties of fibers. Basalt fiber, glass fiber, carbon fiber and other fibers need to be coated with a wetting agent or a sizing agent on the surface of the fiber during the drawing process, and must be heated to form a dry fiber. In the thermal drying process of fibers, technical parameters such as tempera...

AI Technical Summary

Problems solved by technology

[0003] Traditional basalt fiber, glass fiber, carbon fiber, etc. have a high baking temperature, which leads to a high degree of solidification of the film-forming material of the fiber surface sizing agent or sizing agent, which is characterized by poor fiber flexibility and reduces the application of fiber weaving, plying, and compounding. In addition, the traditional fiber drying efficiency is low, resulting in a large difference in heat and dryness along the fiber thickness direction, which makes the film formation uniformity of the sizing agent or sizing agent on the fiber surface poor, and reduces the mechanical strength of the fiber. Increases the performance dispersion of fibers, making it difficult to prepare high-quality fibers