Application of assistant agent in electronic-grade glass fiber cloth desizing and desizing process thereof

Abstract

The invention discloses an application of an assistant agent in electronic-grade glass fiber cloth desizing, a desizing process thereof and an assistant desizing method which is used during production of electronic-grade glass fiber cloths of insulating reinforcing materials of printed-circuit boards. The technical scheme includes that a calcium compound serves as the assistant desizing agent and is used for desizing operation of electronic-grade glass fiber cloths. In the traditional twice smoldering desizing process for electronic-grade glass fiber cloths, the assistant desizing agent containing the calcium compound is added, so that surface size and ash content of electronic-grade glass fiber cloths are decomposed and gasified easily during smoldering, the desizing effect that the content of combustible substances on cloth surfaces is minimum can be achieved within the same desizing time and at the same desizing temperature, the desizing time can be shortened within a permissible range of combustible substances of electronic-grade glass fiber secondary desizing cloths, and the energy can be saved. By the aid of the application and the desizing process, an interface which is pure, white in chroma and low in organic content is provided for a dipped surface active agent of electronic-grade glass fiber cloths, and the time and the energy consumption of the gap type twice desizing process can be reduced.

Description

technical field [0001] The invention relates to an auxiliary desizing method applied in the manufacturing process of electronic-grade glass fiber cloth, which is an insulation reinforcing material for printed circuit boards, and aims to provide a fast and more effective desizing process for electronic-grade glass fiber cloth. Background technique [0002] Electronic-grade glass fiber cloth used as insulation reinforcement for printed circuit boards is an inorganic material, specifically an alkali-free glass fiber (E-glass) material whose main component is SiO 2 、Al 2 o 3 , CaO ternary system, its main raw materials are silica sand, limestone, boron oxide, etc. Alkali-free glass fiber material has excellent electrical properties, insulation, weather resistance, and chemical corrosion resistance. [0003] After the weaving of the cloth surface, the size on the surface of the raw silk and the size on the warp yarn before weaving in the sizing process have no effect, and will...

AI Technical Summary

Problems solved by technology

The second time is intermittent batch desizing to remove the remaining size. After the second desizing, it is required that the residual organic combustibles content on the cloth surface generally does not exceed 0.1%, which takes a long time, generally more than 40 hours, and the required desizing The slurry temperature is higher, usually 350 to 600°C, so more energy is consumed

There are also problems with the two high-temperature desizing, mainly because the desizing effect is still limited, the color of the cloth surface cannot reach the whitest, and the ash content of the cloth surface cannot continue to be reduced. If you want to achieve the best desizing effect, you must rely on extended desizing Time, or the more energy-intensive way of increasing the desizing temperature to achieve

Moreover, prolonging the desizing time or raising the desizing temperature has a great influence on the tensile strength of electronic grade glass fiber cloth, which greatly reduces the strength of electronic grade glass fiber cloth, and it is easy to cause abnormal cloth breakage in the subsequent production process.

Images