Multi Choice for Continuous Fiber Reinforced Composites

  • Thermoplastic UD prepreg machine
  • 2-Step thermoset carbon fiber prepreg manufacturing 
  • Including repreg slitting machine auxiliary equipment
  • All equipment complies with EU national standards for export
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Our prepreg machine is ideal machines for producing thermoplastic UD tape and thermoset prepreg.

High-strength fibers including carbon fiber, glass fiber, basalt fiber, and aramid fiber, serve as reinforcing media during processes like extrusion, calendaring by hot-melt process to produce the innovative continuous fiber-reinforced composite materials.

We also supply auxiliary equipment i.e., an UD tape slitting machine, sheeting machine, and double belt press machine for you to facilitate the later processing of finished products.

If you are looking for prepreg machine, please feel free to send us an inquiry.

 

Jota Machinery: Your Reliable CFRTP CFRP Prepreg Machine Manufacturer in China

Jota is the original CFRTP CFRP prepreg machine manufacturer here in China.

With our own factory and CNC center, equipment quality could be effectively guaranteed.

Please send us an inquiry to make a WhatsApp video call, let’s show you our real-time factory and CNC center.

Jota-CNC-Machine

Jota CNC Center

Thermoplastic UD Prepreg Machine

  • 350mm width carbon fiber UD tape hot-melt prepreg machine
  • Work for PA/PC/PE/PPS/PEEK these thermoplastic resin
  • Thickness of uni-directional tape is 0.2mm
  • Also supply powder impregnation method
Offline debugging and training

Installation and operation user manual, wire connection diagram, tension controller guide.

100% Response for offline training

One-on-one remote video call assistance.

On-site installation and operation guidance.

FAQ
What's the delivery time?

Around 30-45 days, mainly depends on machine type.

Could you help us to buy other goods?

Sure, it is our honor to work for you.

If the machine's spare parts are broken, where could I get?

We will offer you some parts as backup, in case any part is broken within one year, we will sent you for free.

Could you tell us your client’s contact for us to checking machine on site?

Sure, if we have client in your country, we will offer.

Contact Our Support Team

Advancements in Composite Materials: From Prepregs to High-Tech Applications

With the rapid development of modern technology, the demand for material performance is increasing, leading to the emergence of various new materials.

Composite materials, as an important type of new material, can simultaneously utilize the synergistic effects of matrices and reinforcements, and possess advantages such as design flexibility, thus experiencing rapid development.

The push for lightweighting in automobiles and aerospace drives us to expedite the exploration of new materials.

automated fiber placement machine

The successful development of continuous fiber-reinforced thermoplastic composites and thermosetting composites has addressed the special material requirements.

To break through foreign technological barriers, active engagement in the research and development of composite materials has yielded significant results.

In the early 1980s, prepregs were considered a specialized material form, primarily used in the aerospace industry for secondary structures, accounting for approximately 5% of the aircraft’s structural weight.

Today, prepregs can be used in the main structures of large commercial aircraft, with usage exceeding 50% of the aircraft’s structural weight in Airbus A350 and Boeing B787.

Its application has not only rapidly developed in aerospace but also seen increasing utilization in industries such as wind energy, automotive, sports equipment, and industrial machinery.

aircraft wing
Produced by Automated Fiber Placement

Prepregs are composites made by impregnating continuous fibers and woven fabrics with resin under strict control conditions, serving as intermediates in composite manufacturing.

Based on the type of resin selected, prepregs can be divided into thermoplastic prepregs and thermosetting prepregs.

Resins can include epoxy prepregs, polyamide prepregs, phenolic prepregs, cyanate ester prepregs, polysulfone prepregs, polyether prepregs, etc.

Based on the type of reinforcement material, they can be classified into carbon fiber prepregs, glass fiber prepregs, aramid fiber prepregs, basalt fiber prepregs, boron fiber prepregs, etc.

Depending on the structure of the reinforcement material, they can be further categorized into unidirectional fiber prepregs, chopped fiber prepregs, fabric prepregs, etc.

Difference between Thermosetting Prepregs and Thermoplastic Prepregs

Thermoplastic prepregs are composite reinforcement materials (such as glass fiber, carbon fiber, aramid fiber, etc.) that have been pre-impregnated with thermoplastic resin.

Common resins used for thermoplastic prepregs include PP, PET, PE, PA, PPS, and PEEK. Thermoplastic prepregs can be provided in unidirectional form.

thermoplastic resin
Thermoplastic PEEK Resin

The main difference between thermosetting prepregs and thermoplastic prepregs is that thermoplastic prepregs are stable at room temperature and typically have no shelf life. This is the most direct difference between thermosetting resins and thermoplastic resins.

For thermoplastic prepregs, common methods currently used include hot melt method, powder adsorption impregnation method, wet method, etc.

The hot melt method for thermoplastic resins is like that for thermoset prepreg manufacturing process.

The powder method is a typical method for preparing high-performance thermoplastic prepregs (CF/PEEK, CF/PPS, CF/PEAK), which involves depositing resin powder with static electricity onto dispersed fibers and then subjecting them to high temperature treatment to melt the resin into the fibers.

The characteristics of the powder method is rapid continuous production of thermoplastic prepregs, minimal fiber damage, shorter processing time, polymer resistance to decomposition, and potential cost advantages.

However, a drawback of this method is that it is suitable for resin powder with a diameter of 5 to 10 μm, making it difficult to prepare resin particles with a diameter below 10 μm.

The suspension impregnation method involves uniformly distributing resin particles on fibers through a pre-prepared suspension, then heating and drying the suspension to melt the resin and impregnate the fibers to obtain prepregs.

Like the hot melt method, this method has the drawbacks of high technical difficulty and large equipment investment.

The fiber blending method involves spinning thermoplastic resins into fibers or fiber membranes, blending reinforcement fibers with resin fibers in certain proportions, weaving the blended yarn into certain product shapes, and finally melting the resin into the fibers through high temperature to embed them.

However, it is difficult to produce thermoplastic resin fibers with extremely small diameters (<10 μm) using this method, and fiber damage is likely to occur during the process, limiting the application of this technology.

On the other hand, the main resin matrix used in thermosetting prepregs is epoxy resin, while other thermosetting resins such as BMI and phenolic resin can be used to prepare carbon fiber prepregs.

The resin type and ratio have a significant impact on the performance of carbon fiber prepregs. The role of the matrix resin mainly includes two points:

  1. To orient and bond the fibers into a whole.
  2. To transmit stress during product processing.

Different types of resin matrices have different basic properties. For example, phenolic epoxy resins can improve the reactivity and heat resistance of resin systems, while bisphenol A epoxy resins can adjust the viscosity of resin systems.

Generally, it is difficult to meet the processing performance requirements with a single resin, so several resin combinations are usually used to achieve process operations, such as using several different epoxy resin combinations to increase the viscosity of resin systems at room temperature or low temperature.

There are mainly two production methods for carbon fiber prepregs: hot melt method and solution impregnation method, each with its own advantages and disadvantages.

The hot melt method involves melting epoxy resin at high temperature (60-80 degrees Celsius) to reduce its viscosity, then impregnating the reinforcing fibers through different methods to produce prepregs.

Based on the processing status after resin melting, the dry method can be divided into one-step and two-step methods.

In the one-step method, fibers are directly impregnated with resin from a resin tank trough and then dried and rewind up or called towpreg.

The two-step method involves first uniformly coating the melted resin on impregnated paper to form a filmer on a prepreg resin coating machine, then compound it with continuous carbon fibers or fabrics for high-temperature pressing, and finally rewinding it up to prepare unidirectional prepregs.

carbon fiber thermoset prepreg machine
1300mm Thermoset Carbon Fiber Prepreg Machine

In the hot melt method, resin content control is easy, so there is no residual solvent, but due to the high viscosity of the resin, it is prone to fiber deformation during impregnation of carbon fibers or fabrics, so controlling the resin viscosity is necessary for this method.

The solvent impregnation method has low investment cost and simple production process, but the use of solvents is prone to residual in the prepreg, which not only causes environmental pollution but also affects the strength of the material.

Currently, advanced composite materials used in aerospace mostly use carbon fibers as the main component and thermosetting resins as the matrix, with epoxy resin being widely used in thermosetting resin systems.

The post-impact compression strength (CAI value) is commonly used to characterize the toughness of composite materials.

Therefore, both domestically and internationally, prepregs mostly adopt toughened resin to improve the CAI of carbon fiber composite materials.

In aerospace, CAI values below 193MPa indicate low toughness, 193-255MPa indicate tough composite materials, and values above 255MPa indicate high-toughness composite materials.

To improve the CAI of composite materials, reinforced resin toughness is commonly used.

However, domestically, there are relatively few toughening materials that do not change the weight and thickness of composite materials. Thin prepregs are the future trend of composite materials.

In the field of new energy, applications of carbon fiber composite materials in wind turbine blades, photovoltaic polycrystalline silicon crucibles, carbon fiber filament winding hydrogen or gas cylinders, aerospace automated fiber placement (AFP), and other secondary markets are relatively common.

Through technological progress, the application proportion continues to increase, becoming a driving force for the rapid growth of carbon fiber demand.

For example, with the continuous development of the hydrogen energy industry, the successive launch of hydrogen energy vehicles, heavy-duty trucks, logistics vehicles, and even trains have directly driven the demand for carbon fiber pressure cylinders.

In the automotive field, whether traditional fuel vehicles or new energy vehicles, important components such as the body, chassis, and drive shaft urgently need new materials to reduce weight and consumption.

Carbon fiber is one of the best choices.

Increasingly, mainstream automotive manufacturers at home and abroad are adopting carbon fiber composite materials in their high-end new models, leading to continuous growth in demand for prepregs in the automotive sector.

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