Delving into FRPs: Material Characteristics and Applications

Contents

Introduction
FRP Composition and Characteristics
- Resin Matrix
- Fiber Reinforcements
Features of FRP
FRP Applications
Summary

Introduction

Fiber Reinforced Plastic (FRP) is a general term for polymer-based composite materials reinforced with fibers. Traditionally used in applications requiring mechanical strength and durability, FRP is generating increasing attention in sectors where weight reduction, corrosion resistance, and heat resistance are essential to overall performance.
The following column provides a detailed overview of FRP’s key properties and applications.

FRP Composition and Characteristics

Fiber Reinforced Plastic (FRP) consists of a polymer resin matrix and reinforcing fibers designed to enhance the overall mechanical performance of the base material. Common reinforcing fibers include glass fiber, carbon fiber, and aramid fibers such as Kevlar.

Resin Matrix

Both thermosetting and thermoplastic resin types are employed as the matrix material in FRP structures. Epoxy or polyester resins are commonly used in combination with glass fiber reinforcements. This resin matrix plays a critical role in enabling shape retention and governing the processing characteristics of the composite material.

Fiber Reinforcements

The reinforcing fibers create the backbone, providing the material with specific structural strength and stiffness. Typical fibers include glass, carbon, and aramid fibers (also known as Kevlar). While glass fiber is the most commonly used, carbon fiber offers greater mechanical strength and lower density for lightweight, high-performance applications. The overall properties of FRP are strongly influenced by the fiber type.

Features of FRP

Lightweight

FRP exhibits significantly lower density compared to metals, making it ideal for applications requiring weight reductions without compromising structural strength and performance. As a result, FRP is extensively employed in applications such as aircraft, automobiles, and marine vessels, where weight reduction is critical.

High Strength and Durability

The use of reinforcing fibers imparts high tensile and structural strength, resulting in a highly favorable strength-to-weight ratio. Carbon fiber reinforced plastics (CFRP), in particular, often exhibit strength that exceeds metals.

Corrosion Resistance

Unlike metals, FRP demonstrates strong resistance to moisture and chemical-induced corrosion, enabling long-term use in harsh environments with high levels of exposure. Due to these characteristics, FRP is widely used in chemical plants and offshore structures where corrosion is a key concern.

Moldability

FRP has excellent design versatility and moldability, allowing for fabrication into intricate geometries and complex structures. With appropriate selection of resin type and molding method, it can be tailor-molded to precise and specific applications and designs.

Heat Resistance

FRP can withstand relatively high temperatures depending on the type of resin employed. Carbon fiber and epoxy resin matrices, in particular, provide FRP with stable performance even in high-temperature environments.

FRP Applications

FRP is being leveraged across diverse industries owing to its favorable properties. Representative applications include:

Aircraft and Automotive Industries

FRP is widely utilized in body panels and structural sections of vehicles and aircrafts owing to its lightweight structure combined with high mechanical strength. These attributes contribute directly to enhanced fuel efficiency, driving increasing adoption of FRP in both fields.

Sporting Equipment

Applications include high-performance golf club shafts, bicycle frames, and skis. Here, FRP’s low superb strength-to-weight characteristics provide an optimal balance for enhanced athletic and aerodynamic performance.

Construction Industry

FRP is also utilized in structures such as bridges, tanks, and piping systems and other reinforcing structures due to its lightweight and corrosion-resistant properties. It is commonly adopted to provide reinforcement, added durability, and reduced maintenance costs.

Marine Industry

FRP is highly effective in marine environments and applications such as boat hulls and marine structures that require protection from salt water-induced corrosion.

Wind Power Generation

Wind power generation blades benefit from the lightweight and high-strength properties of FRP. This combination is critical to improving the overall efficiency of wind energy.

Summary

FRP is a lightweight, high-strength composite material characterized by corrosion resistance, design versatility, excellent moldability, and heat resistance. These characteristics make FRP a highly versatile material with broad applicability across diverse industries, including aerospace, automobiles, construction, sporting equipment, and marine engineering. Further advances in FRP processing technologies are expected to expand FRP performance capabilities and enable wider adoption in wider fields and applications.

ABOUT UCHIDA - 55 years since our founding

We leverage a wealth of technical expertise as a CFRP molding and processing manufacturer using FRP, GFRP, and CFRP materials. We offer a one-stop solution, encompassing design, analysis, manufacturing, secondary processing, assembly, painting, quality assurance, and testing.

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UCHIDA's equipment

We have cutting-edge equipment to ensure that we can address even the most advanced challenges of our customers.

DMG森精機 - VS1000/40/2050
X軸：2,050mm（ストローク）／ Y軸：1,000mm ／ Z軸：600mm ／テーブル作業面：2,250×1,000mm

ASHIDA MFG Co., Ltd.
Autoclave Oven 2
Size : Ø1,150x1,000mm / Operating temperature : at normal temperature - 400℃ / Design pressure : 2.0Mpa (maximum working pressure) / Vacuum system : back suction system / Vacuum units : 5

ASHIDA MFG Co., Ltd.
Autoclave Oven 3
Size : Ø3,000x6,000mm / Operating temperature : at normal temperature - 200℃ / Distribution accuracy : ±2.5℃less / Heating rate : 4.0℃/min. (empty furnace) / Cooling rate : 4.0℃/min. (empty furnace) / Design pressure : 0.99Mpa (maximum working pressure) / Working pressure : 0.7Mpa less (if no specification from the manufacuturer 0.3Mpa around) / Pressure accuracy : ±0.02Mpa（for pressure setting of ０ - 0.99Mpa/cm²） / Boost pressure accuracy : 0 - 0.03Mpa/min / Pressure source : compressed air (regular use) / Vacuum system : back suction system / Vacuum units : 10

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Oven
Size : W1,000xH1,000xD1,000mm / Temperature range : Environmental Temperature +20 - 300℃ / Temperature elevation capability : Environmental Temperature (20 - 40℃) - 300℃ / 45min less / Vacuum system : back suction system / Vacuum units : 10

ESPEC CORP.
Temperature & Humidity Chamber

INSTRON
Static Universal Testing Machine 5985

Oven
Size : W7,000xH3,000xD2,000mm / Temperature range : Environmental Temperature +20 - 300℃ (Max) / Temperature elevation capability : Environmental Temperature (20 - 40℃) - 300℃ / 60min less / Vacuum system : back suction system / Vacuum units : 10

NEO
X axis : 4,000mm (stroke) / Y axis : 2,000mm / Z axis : 1,200mm / C axis : 0° - ±270° / B axis : 0° - ±110° / Table working place : 4,000x2,000mm

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3Dプリンター | Markforged

Painting booth
Various painting, and clear finish is done in dedicated painting booth

Adhesion, Finishing, Coating Room
Finishing process, such as trimming, drilling, and bonding, surface treatment of the molded product type and is done in a private booth

Toshiba Matrixeye EX (Ultrasonic flaw detector)
Matrix-Arrey : 32

AMETEK CREAFORM Metra
SCAN750 Elite (3D scan)

Olympus Corp.
Inverted Microscopes

Oven
Size : W450xH450xD450mm / Temperature range : Environmental Temperature +20 - 650℃ / Temperature elevation capability : Environmental Temperature+50 - 650℃/120min less

Cutting Plotter Table working place : W1,500xL3,500mm

SHIMA SEIKI MFG., LTD
Cutting Plotter

KUKA
Robot

Krauss Maffei
Epoxy resin injection machine Resin 60L ／ Hardener 25L

Krauss Maffei
630t Press machine Height total 5,200mm ／ Length max 1,500mm ／ Width max 1,200mm ／ Whole cycle time per component part 240sec

DMG森精機 - NV5000B/40
X軸：1,020mm（ストローク）／ Y軸：510mm ／ Z軸：510mm ／テーブル作業面：1,320×600mm

Big sized clean room
JIS B 9920 cleanliness class maximum concentration (Pcs/m³） / Class 5 : 100,000m³ / Capacity : m² (16,000x16,000mm) 760m² (16,000x16,000x3,000mm) / Temperature and humidity condition : Temperature : 23℃±3℃, Humidity 65% less / Ambient conditions : Temperature 35℃ during summer, Humidity 70% less / Ambient conditions : Temperature 35℃ during summer, Humidity 70% less / Temperature -5℃ during winter, Humidity 40% less