Omar Khalid
Fiberglass-reinforced plastic, also known as FRP, is a composite plastic that utilizes fibre materials to enhance the strength and elasticity of the plastic. The development of FRP began in the 1930s, with the first fiberglass-reinforced plastic boat created in 1942 by Ray Greene. However, it wasn't until the mid-20th century that FRP began to be widely used in manufacturing. Today, FRP is commonly used in infrastructure, construction, aerospace, and automotive industries due to its advantageous properties, including lightweight durability, corrosion resistance, and ease of moulding.
| Characteristics | Values |
|---|---|
| Date of Invention | 1932 |
| Inventor | Russell Games Slayter |
| First Application | Insulation of electrical and mechanical components |
| First Commercial Use | 1964/65 World's Fair in New York City |
| Common Uses | Aviation, Automotive, Marine, Construction, Sporting Goods, Electrical Insulators |
| Properties | Lightweight, High Strength, Corrosion-Resistant, Non-Conductive, Mouldable, Durable |
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What You'll Learn
The origins of fiberglass
In 1932, fiberglass was discovered by accident when a jet of compressed air hit a molten stream of glass. This led to further research and the recognition that many natural resins and fibres were polymers. Chemist Leo Baekeland, who had originally set out to find a replacement for shellac, investigated the reactions of phenol and formaldehyde. In 1905, he produced the world's first synthetic plastic, Bakelite, which he announced to the American Chemical Society in 1909.
In 1938, Russell Games Slayter at Owens-Corning patented the production of glass fibres reinforced with plastic resin, creating a material that was strong, lightweight, and durable. Initially, fiberglass was used primarily as insulation material due to its thermal resistance and non-conductive properties. However, its potential for broader applications quickly became evident, especially during World War II when the U.S. military recognised its value in radomes (protective domes for radar systems).
During the 1930s, the development of fibre-reinforced plastic for commercial use was extensively researched, and in 1937, the first fibre-reinforced plastic plane, the Fairchild F-46, took flight. In 1942, Ray Greene built the first fiberglass-reinforced plastic boat, and in 1946, the first car with a fiberglass body, the Stout Scarab, was prototyped.
The post-war construction boom led to the FRP industry's expansion into the construction industry, as the material was lightweight, high in strength, and inexpensive. The 1964/1965 World's Fair in New York City showcased the versatility of fiberglass-reinforced plastic, with over a million pounds of FRP used in various structures.
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The development of fiberglass-reinforced plastic
The first fibre-reinforced plastic was Bakelite, invented by Leo Baekeland in 1905. Baekeland originally set out to find a replacement for shellac, which is made from the excretions of lac bugs. He investigated the reactions of phenol and formaldehyde and discovered that by controlling the pressure and temperature, he could produce a hard, mouldable material. However, Bakelite did not become a commercial success.
In 1932, fiberglass was discovered by accident when a jet of compressed air hit a molten stream of glass. In 1938, Russell Games Slayter at Owens-Corning patented the production of glass fibres reinforced with plastic resin, creating a material that was strong, lightweight, and durable. Initially, fiberglass was used as an insulation material due to its thermal resistance and non-conductive properties. However, its potential for broader applications soon became evident.
During World War II, the U.S. military began using fiberglass for radomes, the protective domes for radar systems, as it was lighter than metal, resistant to corrosion, and non-conductive. In 1942, Ray Greene used polyester resin to reinforce glass cloths and created a fiberglass-reinforced plastic boat. After the war, with the construction boom, the FRP industry turned to the construction industry, where its lightweight and high-strength properties were highly desirable.
FRP has since become widely used in infrastructure and construction, aerospace and automotive applications, and sporting goods. It is valued for its strength, light weight, durability, and corrosion resistance. FRP is used in pedestrian bridges, composite decking, structural beams, piping, aircraft wings, and protective sports gear, among many other applications.
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The first fiberglass-reinforced plastic plane
The first fibre-reinforced plastic plane was either the Fairchild F-46, first flown on 12 May 1937, or the Californian-built Bennett Plastic Plane. The Fairchild F-46 was the first plane to fly with a fibreglass fuselage—a modified Vultee BT-13A designated the XBT-16, based at Wright Field in late 1942.
The development of fibre-reinforced plastic for commercial use was extensively researched in the 1930s, particularly in the aviation industry. In 1932, mass production of glass strands was discovered by Games Slayter, a researcher at Owens-Illinois, who accidentally directed a jet of compressed air at a stream of molten glass and produced fibres. A patent for this method of producing glass wool was first applied for in 1933.
During World War II, fibreglass was developed as a replacement for the moulded plywood used in aircraft radomes, as fibreglass is transparent to microwaves. Its first main civilian application was in the building of boats and sports car bodies, where it gained acceptance in the 1950s.
The Horton Brothers flew an all-plastic glider, the Hols Der Teufel, in May 1936, made from a paper and resin composite known as Astralon. They followed this with the Horton 5A, which flew briefly in June 1937. In 1947, the first all-GRP aeroplane was built by the Germans, called the Phoenix. The first primary flying structure in GRP (glass fibre in polyester) was the Vought Pirate tail plane, specifically the "Fabrilite" used in the fin and rudder.
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The use of fiberglass in boats
Fiberglass, also known as fibreglass or glass-reinforced plastic (GRP), is a common type of fibre-reinforced plastic that uses glass fibre. The fibres may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth.
Fiberglass is a popular material for boats because it is lightweight, strong, and durable. It is also more flexible than steel or aluminium, allowing it to bend and bounce back to its original shape. This makes it ideal for smaller boats that need to be lightweight and manoeuvrable. Additionally, fiberglass is cheaper and more flexible than carbon fibre and stronger than many metals by weight.
The process of manufacturing a fiberglass boat typically involves using a female mould. The mould is first sprayed with gel coat, then fiberglass cloth is applied, and resin is used to saturate or "wet out" the fiberglass. Once the resin cures, the hull or boat part is complete. Structural reinforcements such as stringers and bulkheads can be moulded separately and then fiberglassed to the part or moulded at the same time.
There are different types of fiberglass used in boat construction, including E-glass and S-glass. E-glass is one of the most common types and is made of melted plastic spun into fine fibres that are woven into fiberglass cloth. S-glass is considered high-performance fiberglass, with increased tensile and flexural strength while maintaining a low weight. Another type of fiberglass used in boat construction is Kevlar, which is found especially in race and sailboats due to its high tensile strength and lightweight properties.
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The advantages of fiberglass-reinforced plastic
The history of fiberglass-reinforced plastic (FRP) dates back to the 1930s, with the first car to have a fiberglass body being the 1946 Stout Scarab. Over the years, FRP has become a significant aspect of the polymer industry, offering enhanced strength and elasticity compared to pure plastics.
Advantages of Fiberglass-Reinforced Plastic:
Fiberglass-reinforced plastic offers several advantages over traditional plastics and other materials. Firstly, it has improved strength and rigidity. The addition of glass fibres and other additives significantly enhances the tensile strength, compressive strength, and bending strength of the plastic. This makes FRP ideal for structural applications where high strength is required.
FRP also exhibits improved impact resistance. The glass fibres act as a reinforcement, preventing the plastic from cracking under stress. This makes FRP a durable and reliable choice for various applications.
Another advantage of FRP is its flame retardant properties. The addition of glass fibres and additives reduces the combustion performance of the plastic, making it difficult to ignite. This is particularly useful for applications where fire safety is a concern.
FRP is also lightweight, making it a popular choice for the automotive, aviation, and sporting goods industries. Its lightweight nature helps improve fuel efficiency and handling in vehicles and aircraft, while also reducing the overall weight of sporting equipment, making it easier for athletes to manoeuvre.
Additionally, FRP is highly versatile and can be moulded into complex shapes. This makes it suitable for a wide range of applications, from aircraft and boat components to roofing, pipes, and even protective gear for sports. Its ease of moulding and painting also allow it to blend seamlessly with existing structures, making it ideal for telecommunications equipment and cabinets.
In terms of electrical properties, FRP is non-conductive and transparent to electromagnetic radiation. This makes it suitable for electrical insulation and telecommunications applications.
FRP also offers improved hygroscopic performance. The addition of glass fibres makes the originally non-water-absorbent plastic water-absorbent, which can be advantageous for certain applications.
Finally, FRP is generally cheaper than alternatives like carbon fibre, making it a cost-effective choice for many industries.
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Frequently asked questions
Fiberglass reinforced plastic was invented in 1942 by Ray Greene, who used polyester resin to reinforce glass cloths and created a boat.
The first use of fiberglass reinforced plastic was in the construction of a boat in 1942.
Fiberglass reinforced plastic is strong, lightweight, and durable material that is resistant to corrosion. It is also non-conductive and has thermal resistance.
The manufacturing process of fiberglass reinforced plastic involves placing dry layers of fiberglass into a mould and using a vacuum to draw resin into the mould. This method ensures the fiberglass is fully saturated while minimising resin usage, resulting in a stronger and lighter structure.
Fiberglass reinforced plastic has a wide range of applications due to its advantageous properties. It is commonly used in the marine industry for boats, in the automotive industry for car bodies, and in the aerospace industry for aircraft components. Additionally, it is utilised in construction, sporting goods, storage tanks, and many other areas where its unique characteristics are beneficial.
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