Preparation method of continuous fiber reinforced thermoplastic composite material prepreg and equipment thereof

Abstract

The invention relates to a preparation method of a continuous fiber reinforced thermoplastic composite material prepreg and equipment thereof. The method comprises the following steps: (a) leading out and unfolding continuous fiber from a creel (10) to pass a tension adjusting device (20) and a static elimination device (30) in sequence, sending the fiber to a preheating oven (40) to preheat, and then passing a tension adjusting device (50); (b) leading a preheated continuous fiber band into a dual-extrusion die head set which can be opened and closed in a staggered manner to presoak; and (c) leading the presoaked continuous fiber band into a soaked rolling roll set (70) to soak, then cooling by a cooling roll-in device (80), and finally leading into a traction rolling device (90) for shaping by winding to obtain the product. Compared with the prior art, the invention significantly improve the dispersion, infiltrating property and operability of the fiber, and obtains the continuous fiber reinforced thermoplastic composite material prepreg which has uniformly dispersed and completely soaked fiber.

Description

technical field [0001] The invention relates to a preparation method and equipment for a prepreg tape, in particular to a preparation method and equipment for a continuous fiber reinforced thermoplastic composite material prepreg tape. Background technique [0002] Continuous fiber reinforced thermoplastic composites have excellent mechanical properties, strong processability and stable chemical properties, such as high tensile strength and flexural strength / modulus, excellent high and low temperature impact properties, strong designability, molding High efficiency, acid and alkali resistance, etc., and also has the characteristics of recyclability. In recent years, under the promotion of environmental protection and energy saving policy concepts, its development and application have been greatly developed, and the corresponding manufacturing technology has been continuously improved and improved. [0003] Nowadays, technical routes such as solution impregnation, melt impreg...

AI Technical Summary

Problems solved by technology

However, because the impregnation of the fibers occurs inside the impregnation die, it is difficult to control the impregnation of the fibers, and it is difficult to clean the impregnation die and arrange and thread the fibers, so it is not suitable for the manufacture of wide prepreg tapes

U.S. Patent No. 3,908,042 uses a rotating dipping roller to pass through the molten resin pool to adhere it to the surface and then contact the fiber. Because the tension between the surface of the roller and the fiber makes the resin penetrate the fiber tow, this method solves the problem mentioned earlier. Difficulty in impregnation and wire threading, but there are problems such as easy oxidation of molten resin pool and difficult control of resin content

In addition, the Chinese patent CN88102218A and the two patents with the publication number CN101152767A also have the same problems mentioned in the US patent US5529652. Due to the use of a closed cavity, threading and die cleaning are difficult.

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