Where is the soul of carbon fiber prepreg? Unveiling the key roles of Yushun Intelligent Double Planetary Mixer and Vertical Kneader

From the fuselage of the Boeing 787 to the chassis of an F1 racing car, the reason why carbon fiber composite materials can dominate high-end manufacturing lies in the use of carbon fiber prepregs. However, many people think that the soul of the prepreg is the carbon fiber, but they don't realize that what truly determines the strength and lifespan of the final part is the resin matrix wrapped around the fibers.

In the process of preparing carbon fiber prepregs, the preparation of the resin is the most prone to failure step. When dealing with resin systems with a viscosity of tens of thousands or even hundreds of thousands of cps, traditional equipment is completely powerless.

Today, let's delve deeply into the following question: What specific roles do Yushun Intelligent Double Planetary Mixer and Vertical Kneader play?

When preparing pre-impregnated materials through the hot-melt method, there are three major challenges in the resin mixture process:

Firstly, there is an extremely high viscosity. The resin is like thick molasses, and even a regular blender cannot handle it; it might even get damaged.

Secondly, the aspect is the uniformity of dispersion. Once the toughening agent aggregates, it will cause white spots in the prepreg, leading to the fracture of carbon fiber components.

Finally, the fatal flaw of bubbles is that when the micro-bubbles are solidified at high temperatures, they will expand, causing the prepreg to develop pores and become waste directly.
In response to these challenges, Yushun Intelligent has provided the following solution: a combination of dual planetary mixers and vertical kneader machines.

At the front end of the prepreg process, it is responsible for the initial macroscopic mixing and defoaming. Two rotating shafts rotate independently while also orbiting around the center, completely eliminating dead corners.
Its core functions include:
First, forced convective mixing, with strong shear force achieving macroscopic absolute uniformity;
Second, high vacuum defoaming, instantly removing the original air bubbles, which is a prerequisite for high-quality film;
Third, precise temperature control, preventing heat generation from shear leading to stuck-gel accidents. 

When a large amount of nanoscale fillers are added to the formula, a vertical mixer is needed to take over, responsible for the powerful dispersion at the microscopic level. It squeezes, folds and tears the materials through the blades.
Its core value lies in:
First, it breaks up agglomerates and shreds the toughening particles, enabling the film to have extremely high toughness;
Second, it achieves extreme mixing and wetting, forcing the resin to encapsulate each particle of powder;
Third, it adjusts the rheological properties of the resin, which is a prerequisite for the subsequent coating process to successfully form the film. 

In the actual production line, the typical process path is as follows: the base resin is mixed with liquid additives, and then it enters Yushun's double planetary mixer for macro-mixing and defoaming. Subsequently, a solid toughening agent is added, and it then enters Yushun's Vertical Kneader for intense kneading. Finally, the mixture is discharged for use in the film coating machine.
By choosing Yushun Intelligent, enterprises can enjoy three major benefits:

First, the film is free of defects and the surface density error is controlled within ±1%.

Second, the performance limit is high, and it can easily pass the aerospace-grade impact resistance test.

Thirdly, the stable and easy cleaning tank design significantly reduces the production changeover time.

The competition in carbon fiber prepreg lies behind the competition of resin matrix formulations and equipment capabilities. Without good compounding equipment, even the best formulations can only remain on paper. Yushun Intelligent's core equipment is precisely the bridge that transforms top-notch formulations into practical production reality.

Interactive topic: What problems have you encountered during the mixing of high-viscosity materials? Please feel free to leave your comments in the discussion area to share your experiences!