A kind of production method of glass fiber SMC yarn

Abstract

The invention discloses a production method of glass fiber SMC yarn, which comprises the following steps: 1) preparation of an impregnating agent; 2) dosing; 3) melting in a kiln; 4) bushing; 5) coating with the impregnating agent; 6) drawing; 7) drying; 8) roving winding; 9) inspection and storage. According to the method disclosed by the invention, by adopting the complete-performance glass component and the special impregnating agent, the need of the drawing operation is met in the drawing technology while the processability of a later unwinding process is also guaranteed, thus the glass fiber SMC yarn has good acid resistance and water resistance, relatively high strength and good electric properties and mechanical properties.

Description

technical field [0001] The invention relates to a reinforcing material of acid-resistant and alkali-resistant high-strength glass fiber SMC yarn and a method for producing special SMC yarn. Background technique [0002] SMC special yarn is a new type of reinforcing material with excellent performance. It has good acid resistance, good alkali resistance, high strength and good electrical and mechanical properties. It not only solves the problem of poor acid resistance of alkali-free glass fiber, but also solves the problem. Alkali glass fiber has poor alkali resistance and low tensile breaking strength. Due to the special performance of SMC special yarn, it can be widely used in aerospace, construction, environmental protection, chemical industry, electrical and electronic, machinery, transportation and other fields. [0003] At present, the main component of medium-alkali glass fiber is SiO 2 : 67±0.5%; Al 2 o 3 : 6.2±0.4%; Na 2 O / K 2 O: 12±0.4%; the main component of a...

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Problems solved by technology

[0003] At present, the main component of medium-alkali glass fiber is SiO 2 : 67±0.5%; Al 2 o 3 : 6.2±0.4%; Na 2 O / K 2 O: 12±0.4%; the main component of alkali-free glass fiber is SiO 2 : 54.1±0.5%; Al 2 o 3 : 14.6±0.4%; Na 2 O / K 2 O: ≤0.8%; in order to improve the tensile strength of glass fiber, but also have good acid resistance, alkali resistance, electrical properties and mechanical properties, it is necessary to increase Al on the basis of medium-alkali glass fiber composition. 2 o 3 and CaO content while reducing SiO 2 , Na content; but changes in various oxides in the glass will change the performance of the glass, but also destroy the original stable three-dimensional structure, SiO 2 If the content is too high, it will increase the viscosity and melting temperature of the glass liquid, making it difficult to melt and easy to crystallize, resulting in short glass frit, which is not conducive to wire drawing. A new type of glass composition that takes into account the performance of medium and non-alkali glass fiber yarns