Alkali-free continuous glass fiber yarn with high content of FeO and preparation method of alkali-free continuous glass fiber yarn

Abstract

The invention discloses an alkali-free continuous glass fiber yarn with high content of FeO and a preparation method of the alkali-free continuous glass fiber yarn. According to the alkali-free continuous glass fiber yarn with high content of FeO, FeO in the glass fiber yarn accounts for 60 to 80 percent of the total iron content; the alkali-free continuous glass fiber yarn is prepared from the following raw materials: mineral powder containing SiO2 and Al2O3, mineral powder containing CaO, mineral powder containing B2O3, a fluxing agent and a clarifying agent. The invention also discloses a preparation method of the alkali-free continuous glass fiber yarn with high content of FeO. The alkali-free continuous glass fiber yarn with a high specific value of FeO to TFe2O3, prepared by the preparation method disclosed by the invention, has the advantages of relatively-slow glass hardening speed, good rheological property, good homogeneity, soft yarn, high mechanical strength and excellent electrical insulation performance; meanwhile, compared with a preparation method of an alkali-free continuous glass fiber yarn with a low specific value of FeO to TFe2O3, the preparation method disclosed by the invention has the advantages that the drawing speed can be improved, the length of the yarn can be greatly increased and good economic benefits are obtained.

Description

technical field [0001] The invention relates to an alkali-free continuous glass fiber yarn with high FeO content and a preparation method thereof. Background technique [0002] Electronic grade alkali-free continuous glass fiber yarn, the product requires a certain fiber length, good linear density stability, high breaking strength and low alkali metal content, so as to meet the requirements of weaving and electrical insulation performance. Alkali-free continuous glass fiber yarn is generally drawn from alkali-free (E) glass. With the continuous improvement of downstream customers' weaving technology, faster drawing speed and longer fiber length are required for the production of alkali-free continuous glass fiber yarn. . In the past research, it was believed that after the glass composition is determined, the temperature-viscosity curve of the glass is not easy to change, and the heat capacity and thermal conductivity rarely change, but the change of FeO content has a sign...

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Problems solved by technology

In the past research, it was believed that after the glass composition is determined, the temperature-viscosity curve of the glass is not easy to change, and the heat capacity and thermal conductivity rarely change, but the change of FeO content has a significant impact on the glass hardening speed. In the industry, FeO / TF 2 o 3 The ratio is basically controlled at 30% to 50%. It is generally believed that in this range, the glass is weakly reducing, the color of the glass is blue-green, and has low sulfur solubility, but the surface tension is large, and the hardening speed is relatively fast. Suitable for processes with relatively low drawing speeds

Once the drawing speed is increased, this low FeO / TFe 2 o 3 Ratio glass will cause fiber breakage due to too fast hardening during drawing, and cannot reach the set fiber length, thus greatly affecting the yield, so this is the key factor restricting the production of alkali-free continuous glass fiber

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