Strongwell Manager Introduced the Principle, Performance Advantages and Applications of FRP Pultrusion Process

 

 

Editor’s note: As the old saying goes, “every man has his own opinion of what he thinks”. In order to gain more professional knowledge from different perspectives of industry experts and scholars, this public account has opened up the “Expert Perspective” section, where domestic and foreign experts in the carbon fiber and composite materials industry will interpret the latest market and technology in this field for you.

 

In this issue of “Expert Perspective” article, Randy Montgomery of Strongwell will tell you how FRP composite materials can save construction budgets, shorten construction time and reduce the need for professional workers.

 

Randy Montgomery is the industrial product manager of Strongwell. Before becoming an important member of Strongwell’s composites industry, Montgomery has accumulated rich experience in the steel industry. He has held various positions from structural detailer and estimator to project manager.

 

 

What are Fiber Reinforced Polymer Composites?

 

Randy Montgomery:

Fiber reinforced polymer (FRP) refers to composite materials composed of glass fibers (or carbon fibers) reinforced with a polymer resin matrix. The properties of the component are affected by factors such as manufacturing technology and the type, arrangement, number and location of fibers in the composite.

 

This variability allows for customized configurations within the same size component. This flexibility proves to be particularly advantageous based on the intended application and desired performance characteristics.

 

Structural composites can be processed using a variety of different manufacturing methods. Among them, pultrusion stands out for its consistency in large-scale production and it is also one of the most cost-effective methods for processing FRP components.

 

 

 

Can You Tell Us About Some of the Applications of FRP Composites?

 

Randy Montgomery:

FRP composites are used in both the construction and industrial sectors. They are often used as an alternative to traditional materials such as wood, steel or aluminum to replace I-beams, wide flange beams, angles, channels, pipes and similar structural shapes. FRP composites can also replace metal plates and have a variety of uses. The adaptability of FRP allows it to be used in applications such as: walkways (including gratings, handrails and structural members), platforms, stair structures, sidewalks, handrails and fences.

 

Strongwell is recognized as a global leader in FRP pultrusion. Can you tell us more about how the pultrusion process works?

 

Randy Montgomery:

Pultrusion is a common forming process designed to produce continuous lengths of reinforced polymer structures with a consistent cross-sectional profile. The process stretches the raw material (a mixture of liquid thermosetting resin and reinforcing fibers) through a heated steel forming die using a continuous stretching principle to produce a strong structural composite. While many are familiar with the extrusion process, which involves pushing pellets or chopped fibers into a die, the pultrusion process features a continuous length of reinforcement material that is continually pulled through a die.

 

 

How do FRPs Compare to Traditional Structural Materials? What advantages do FRP Composites Offer Over their Alternatives?

 

Randy Montgomery:

FRPs offer many advantages that make them very attractive. The most important of these advantages include:

 

▪ High Strength:

▪ Pultruded FRPs have strengths comparable to or greater than those of structural steel;

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▪ Light Weight:

▪ Pultruded FRP profiles weigh 75-80% less than steel and 30% less than aluminum. This weight reduction reduces shipping costs, simplifies installation, and reduces the overall weight of the assembled structure.

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▪ Corrosion Resistance:

▪ When the right resin is used, FRPs are not susceptible to a wide range of corrosive environments. FRPs will not rust or rot.

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▪ Low Electrical Conductivity (Thermal and Electrical):

▪ Glass-fiber reinforced FRPs are excellent insulators with minimal thermal and electrical conductivity. This quality makes them a top choice for applications involving temperature sensitivity or electrical issues.

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▪ Electromagnetic transparency:

▪ Glass fibers allow radio waves, microwaves, and other electromagnetic frequencies to pass through, making glass fiber-based FRPs well suited for cellular structural applications.

 

 

 

In terms of installation costs, how does the use of FRP save money on construction budgets? How do FRP composites help companies shorten project timelines and ease the need for highly skilled workers?

 

Randy Montgomery:

One of the main advantages of choosing pultruded FRP is the simplicity of the manufacturing and installation process. Because FRP is lightweight, it reduces the need for specialized lifting equipment on the job site.

 

Likewise, the handling process is more convenient than traditional structural materials. Assembling FRPs typically revolves around bolted or bonded connections, eliminating the need for welding or hot work permits and reducing the number of skilled workers on site.

 

In cases where on-site fabrication is more than just assembly, standard woodworking tools equipped with carbide drills and diamond blades can accomplish tasks such as cutting and drilling. This approach reduces the risk of on-site injuries or downtime often associated with traditional materials and installation equipment.

 

In short, the combination of shortened construction timelines, simplified equipment requirements, and reduced reliance on specialized labor saves a lot of time and money on construction projects.

 

How do you see the development of FRP composites in the next decade?

 

Randy Montgomery:

FRP composites are not new. Strongwell has been producing pultruded fiberglass-reinforced composites since 1956. At the time, the main shapes manufactured were simple walkways, ladders and similar items. Now, more and more engineering schools are offering composites courses, which is also making the next generation of engineers aware that alternative structural materials can be considered in design, rather than just turning to them when traditional materials are insufficient.

 

Although materials such as steel, wood, aluminum and concrete have their place in many applications, more and more engineers understand that there are better materials available. They are applying this knowledge by coming up with designs that incorporate composites more widely than ever before.