A kind of gf/pp composite fiber sizing agent and its application

Abstract

The present invention provides a GF / PP composite fiber sizing agent and its application. The percentages of each component in the sizing agent and the solid mass of each component to the total solid mass of the sizing agent are: coupling agent 0.5% to 15%, Film-forming agent 70-98%, lubricant 0.1-10%, antioxidant 0.5-5%, wetting agent ≤ 0.2%, defoamer ≤ 0.5%; The GF / PP composite yarn coated with the sizing agent has good wear resistance, which effectively solves the problems of downtime and decreased weaving efficiency caused by frequent weft yarn breakage during the weaving process; and the sizing agent of the present invention is used After drying, the coated GF / PP composite yarn will not cause yellow spots on the end face of the yarn cluster due to the migration of the sizing agent. The composite material product made of the composite yarn has a uniform surface color and good mechanical properties, which can satisfy customers. requirements.

Description

【Technical field】 [0001] The invention relates to the technical field of sizing agents, in particular to a GF / PP composite fiber sizing agent and its application. 【Background technique】 [0002] GF / PP composite fiber yarn is made of glass fiber (GF) and polypropylene fiber (PP fiber) through a special process, that is, there are both glass fiber and polypropylene fiber in a bundle of yarns. The yarn is mainly used as a continuous glass fiber reinforced polypropylene composite product. In the process of making GF / PP composite fiber yarn, a sizing system needs to be coated on the surface of glass fiber and polypropylene fiber. The composite fiber yarn composed of acrylic fiber provides protection to avoid the hairiness and yarn breakage of the composite fiber yarn in the subsequent processing (such as weaving, winding, winding, pultrusion, etc.), which will affect the subsequent processing technology; at the same time, the infiltration The agent system needs to have a good af...

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Problems solved by technology

The main purpose of this invention is to solve the problem of warp yarn hairiness and yarn breakage when the composite yarn is weaving, but it does not mention the improvement of yarn breakage and hairiness when the composite yarn is used as a weft yarn. In fact, the composite yarn produces hairiness and hairiness during the weaving process. The most prominent and serious broken yarn is the weft yarn, because the running speed of the warp yarn is very slow during the weaving process, generally below 1m / min, while the running speed of the weft yarn is as high as 400-700m / min, at such a high traction speed , the smoothness and bunching of weft yarns directly determine the number of broken yarns and the level of weaving production efficiency; at the same time, the patent does not mention the color status of the final composite product obtained after using this sizing system

[0004] Patent CN201611115209.8 discloses a sizing agent for direct yarns of GF / PP composite fibers for textile use. The sizing agent prepared by the patent does not have strong adhesion to polypropylene fibers, and the composite yarn coated with the sizing agent is used to make The resulting composite has slightly poorer performance and has yellow streaks

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