Continuous fiber reinforced thermoplastic resin composite material and method for producing same

Abstract

Disclosed is a scheme whereby a continuous fiber reinforced thermoplastic resin composite material applicable to production of a reinforcing material of various thermoplastic injection products and manufacture of a fiber reinforced thermoplastic plastic part using 3D printing can be produced by a simple method to have an excellent mechanical property. The present invention provides a continuous fiber reinforced thermoplastic composite material in which a plurality of yarns or tape intermediate materials are twisted together to have a rod shape, and a method for producing the same.

Description

technical field [0001] The present invention relates to a continuous fiber-reinforced thermoplastic resin composite material and a manufacturing method thereof, and more specifically, to a continuous fiber-reinforced thermoplastic resin composite material that can be used as a reinforcement for thermoplastic resin injection-molded products and a manufacturing method thereof. Background technique [0002] Continuous fiber reinforced polymer rods have been used as structural reinforcements in a variety of applications. Typically, the polymer rod is used as a reinforcing bar inserted into the interior of concrete instead of a steel bar, and in recent years, the polymer has been introduced into the insert injection molding process and used as a reinforcing insert inserted into the interior of an injection-molded part, in order to improve various It is used to achieve weight reduction while maintaining the mechanical properties of injection molded parts. In addition, this polyme...

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Problems solved by technology

[0004] Korean Patent Publication No. 2016-0054661 discloses a unidirectional continuous fiber-reinforced thermoplastic composite material, which is characterized in that it is formed by impregnating a thermoplastic resin in a reinforcing fiber having a continuous fiber form, winding it into a circle, and cutting it into a predetermined length. , but the process of forming a thermoplastic resin composite material in the form of a film by putting it into a roll forming machine and winding it into a rod form generally has a problem that the film is broken during the process without being wound or wrinkling, or fiber breakage during the process

This patent discloses a technique of making a rod with a circular cross-section by applying a drawing force after impregnating a continuous fiber in a resin and passing it through a nozzle. At this time, in order to form a protrusion on the surface, a Coil the second fiber and the third fiber, but because this technology requires a process of braiding the fiber in addition to the drawing process, additional expensive equipment is required

Drawing molding equipment is large-scale equipment, and economical unit product cost can only be ensured by maintaining mass production, and its additional equipment is expensive and large-scale equipment, requiring a large initial investment

[0006] Korean Granted Patent No. 1714772 relates to a 3D solid object manufacturing robot that manufactures 3D solid objects using materials made of moldable plastic materials. Examples of materials used include strands and yarns. , tow, bundle, band or tape, but does not mention any proposals for forming processes such as compaction, etc. of the material put in, and does not propose an actual product It is not possible to confirm whether the qualities that can be used as reinforcement materials such as strength and rigidity, cross-section and surface uniformity have been realized due to application examples

[0007] As a method enabling the use of continuous fiber-reinforced composite materials in 3D printers, although R. Matsuzak et al. (R. Matsuzak et al., Scientific Reports (Nature), Vol. 6 (2016) 23058) discloses a technology for improving product strength and rigidity, However, using the method of instantaneous impregnation by separately supplying the continuous fiber bundle and the resin, since the method of applying heat to the nozzle part of the 3D printer to melt the supplied thermoplastic resin and instantaneously impregnate it into the independently supplied continuous fiber will add an impregnation process, so Has the problem that 3D printer equipment becomes bulky and it is difficult to increase production speed

Since the impregnation state of the thermoplastic resin affects the strength and rigidity of the composite material, it is necessary to maintain a high temperature and high pressure state for a long time to maintain an excellent impregnation state, and if a device that generates a high temperature and high pressure state is installed inside the 3D printer, it is difficult. Maintain and apply 3D printer equipment and increase unit cost, and it is difficult to quickly improve production efficiency and cause low quality problems

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