Impregnating compound special for single-filament plastic coated yarn and preparation method thereof

Abstract

The invention relates to an impregnating compound special for single-filament plastic coated yarn and a preparation method thereof. The impregnating compound is prepared mainly by a main film former including water-solubility polyurethane and epoxy resin emulsion, and an assistant film former including water-solubility epoxy resin, as well as a coupling agent, a lubricating agent, a pH value adjusting agent and deionized water. The preparation method comprises the following steps: hydrolyzing the coupling agent in the deionized water; diluting the lubricating agent, and adding the diluted lubricating agent into the hydrolyzed coupling agent for stirring; adding the water-solubility polyurethane, the epoxy resin emulsion and the water-solubility epoxy resin for continuously stirring; and adding the deionized water and stirring uniformly. In the invention, the water-solubility polyurethane and the epoxy resin emulsion are taken as the film formers, so that the impregnating compound has the advantages of simple preparation process and low cost; and glass fiber yarn produced by the impregnating compound has extremely high breakage resistance and smaller fur containing amount, and the strength and the production efficiency of products are improved greatly, so that the impregnating compound is more suitable for promotion and application.

Description

technical field [0001] The invention relates to a sizing agent and a preparation method thereof, in particular to a special sizing agent for monofilament plastic-coated yarn and a preparation method thereof. Background technique [0002] Monofilament plastic-coated yarn is made of glass fiber yarn coated with paste-like polyvinyl chloride resin after drying and plasticizing. It is mainly used for weaving high-grade insect-proof nets and sunshade fabrics. The sizing agent is an organic system coated on the surface of the fiber during the continuous drawing process of the glass fiber. This organic coating can not only effectively lubricate the fiber surface, but also bundle hundreds or even thousands of monofilaments. [0003] The sizing agent for monofilament plastic-coated yarns generally uses starch-type sizing agents abroad. The main advantages are non-toxic and non-irritating to the human body. However, the starch amylose content required for the sizing agent must reach m...

AI Technical Summary

Problems solved by technology

[0003] The sizing agent for monofilament plastic-coated yarns generally uses starch-type sizing agents abroad. The main advantages are non-toxic and non-irritating to the human body. However, the starch amylose content required for the sizing agent must reach more than 55%, and the starch used needs to be gelatinized. The process is cumbersome and still needs to be imported, the production cost is high, and the starch-type sizing is used in the glass fiber processing process, which requires extremely strict environmental temperature and humidity, and a large amount of hairiness will easily occur if it exceeds the control range

[0004] In addition, low-wax type sizing agents are also used in China as sizing agents for monofilament plastic-coated yarns. They use paraffin wax and color-fixing agents (formaldehyde and dicyandiamide condensation polymers) to make film-forming agents. As an emulsifier, there is a phase inversion point in the preparation process, and it is not easy to operate. The glass fiber yarn produced by this sizing agent also has the defects of low fiber strength, large hairiness, and easy to block the abrasive tool during plastic coating.

[0005] This shows that the above-mentioned existing monofilament plastic-coated yarn sizing agent obviously still has inconvenience and defects in preparation and use, and needs to be further improved urgently.