Pultruded Spar Cap Market Analysis | 2025-2031

Market Insights

The pultruded spar cap market was estimated at USD 565 million in 2024 and is likely to grow at a CAGR of 17.8% during 2025-2031 to reach USD 2144 million in 2031.

Market Dynamics

Introduction

About a decade ago, pultruded spar caps were introduced in the market to improve the stiffness of wind turbine blades. With the continuous technological advancements and evolution of longer wind turbine blades, it has become paramount that the wind blade must withstand deflection and stiffness at critical points. Thus, the design of wind turbine blades is getting more complex and critical. Pultruded spar caps with carbon fiber-reinforced polymer offer greater stiffness and make the blade lighter and thinner. Overall, pultruded spar caps offer robustness, low overall blade cost vs. infusion, lower operational expense, and reduced cycle time. However, pultruded spar caps are more suitable for wind turbines with longer blade lengths.

Similarly, around a decade ago, Vestas pioneered and patented the carbon fiber pultruded spar cap. It all started in 2007 when Zoltek started cooperating with Vestas to use carbon fiber in the 60-meter-long wind turbine blades in the USA.

Market Drivers

Key Market Drivers for pultruded spar cap market:

• Increasing Demand for Longer Yet Lightweight Wind Turbine Blades
• Wind Energy Remains One of the Most Preferred Energy Choices in the Years to Come. 
• Growing Wind Turbine Installations
• Advantages of Spar Caps in Wind Turbines

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Recent Market News

• In 2022, Gurit acquired a 60% stake in Fiberline Composites A/S, a pioneering technology-driven manufacturer specializing in pultruded carbon and glass fiber products utilized in the production of wind turbine blades.

Segment Analysis

By Resin Type

“Vinyl ester resin is expected to remain the largest and fastest-growing resin of the market during the forecast period.”

• Based on the resin type, the pultruded spar cap market is segmented into epoxy resin, vinyl ester resin, and other resin.
• Vinyl ester performs better than epoxy composites under tension and offers greater resistance. This ensures the structural integrity of pultruded components, making them more suitable for demanding wind turbine applications.
• However, polyurethane composite is also gaining traction in the market, especially in Europe, as it offers improved bending strength and higher interlaminar shear strength than vinyl ester and epoxy.
• However polyurethane one of the other resins also improves productivity, mainly due to its low viscosity and high reactivity, which, in turn, reduces the production cost of pultruded spar caps when compared with vinyl ester and epoxy composites.

By Fiber Type

“CFRP is expected to maintain its supremacy in the market as the fastest-growing fiber type during the forecast period.”

• Based on the fiber type, the market is segmented into CFRP and GFRP & Hybrid.
• With the ongoing trend of increasing wind blade lengths to enhance wind power, incorporating carbon fiber for making plates for spar caps has emerged as an effective strategy to improve the strength-to-weight ratio and enhance blade rigidity.

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By Shore Type

“Offshore is expected to be the faster-growing shore of the market during the forecast period.”

• Based on the shore type, the market is segmented into onshore pultruded spar caps and offshore pultruded spar caps.
• Due to the challenging environment and harsh conditions faced by offshore installations, the incorporation of pultruded spar caps offers notable advantages, such as corrosion resistance, durability, lightweight design, and structural integrity.
• Offshore wind turbine blades are now increasingly being developed with carbon fiber pultruded spar caps, as carbon fiber's high strength allows spar caps to distribute loads effectively, reducing material stress and extending the overall fatigue life of the blade.
• Offshore wind turbines typically experience higher and more consistent wind speeds compared to onshore locations. The lightweight yet strong nature of carbon fiber pultruded spar caps contributes to maximizing energy yield from offshore installations.

Regional Analysis

“Asia-Pacific is the biggest market for Pultruded spar cap during the forecast period.”

• In terms of regions, Asia-Pacific is the biggest market and is likely to grow at the fastest rate over the coming years, driven by an expected increase in offshore turbine installations and emerging opportunities for carbon fiber pultruded spar caps. Vestas has formed cooperation with a few local players, Weihai Guangwei Composites Co., Ltd. and Jiangsu Aosheng Composite Material Technology Co., Ltd., for the supply and development of pultruded spar caps in the region. China is likely to remain the key growth engine of the market, as the country is the largest wind turbine installer in the world and has the presence of many leading wind turbine manufacturers.
• Europe is the second-largest offshore wind turbine installer in the world. This region has a presence of major OEMs, such as Vestas, Siemens Gamesa, Nordex SE, Enercon GmbH, and General Electric Company. Exclusive supplier agreements by these OEMs with leading pultruded spar cap manufacturers like Zoltek Corporation, Fiberline Composites, and DowAksa, will bolster healthy growth in the market over the years.

Key Players

The market is moderately populated, with the presence of a handful of regional and global players. Most of the major wind turbine blade manufacturers are cooperating with the leading players to develop and supply pultruded spar caps in the market.

The following are the key players in the pultruded spar cap market (Based on Dominance).

• Zoltek Corporation (Toray Industries, Inc.)
• Fiberline Composites A/S (Gurit Holding AG)
• Weihai Guangwei Composites Co., Ltd.
• DowAksa Advanced Composites Holdings B.V.
• Jiangsu Aosheng Composite Material Technology Co., Ltd.
• Exel Composites Oyj
• Saertex GmbH & Co., KG
• Epsilon Composite
• Röchling SE & Co., KG
• Hexcel Corporation

Note: The above list does not necessarily include all the top players in the market.

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Report Features

This report provides market intelligence in the most comprehensive way. The report structure has been kept such that it offers maximum business value. It provides critical insights into market dynamics and will enable strategic decision-making for existing market players as well as those willing to enter the market. The following are the key features of the report:

• Market structure: Overview, industry life cycle analysis, supply chain analysis.
• Market environment analysis: Growth drivers and constraints, Porter’s five forces analysis, SWOT analysis.
• Market trend and forecast analysis.
• Market segment trend and forecast.
• Competitive landscape and dynamics: Market share, Service portfolio, New Product Launches, etc.
• COVID-19 impact and its recovery curve
• Attractive market segments and associated growth opportunities.
• Emerging trends.
• Strategic growth opportunities for the existing and new players.
• Key success factors.

Market Segmentation

This report studies the market, covering 12 years of trend and forecast. The report provides detailed insights into the market dynamics to enable informed business decision-making and growth strategy formulation based on the opportunities present in the market.

The pultruded spar cap market is segmented into the following categories:

By Resin Type 

• Epoxy Composites
• Vinyl Ester Resin
• Other Resins

By Fiber Type

• Carbon Fiber Composites (CFRP)
• Glass Fiber Composites (GFRP)
• Hybrid Composites

By Shore Type 

• Onshore
• Offshore

By Region

• North America (Country Analysis: The USA, Canada, and Mexico)
• Europe (Country Analysis: Germany, France, The UK, Russia, and the Rest of Europe)
• Asia-Pacific (Country Analysis: China, India, Australia, South Korea, and the Rest of Asia-Pacific)
• Rest of the World (Country Analysis: Saudi Arabia, Brazil, and Others)

Research Methodology

• This strategic assessment report from Stratview Research provides a comprehensive analysis that reflects today’s pultruded spar cap market realities and future market possibilities for the forecast period. 
• The report segments and analyzes the market in the most detailed manner in order to provide a panoramic view of the market.
• The vital data/information provided in the report can play a crucial role for market participants as well as investors in the identification of the low-hanging fruits available in the market as well as to formulate growth strategies to expedite their growth process.
• This report offers high-quality insights and is the outcome of a detailed research methodology comprising extensive secondary research, rigorous primary interviews with industry stakeholders, and validation and triangulation with Stratview Research’s internal database and statistical tools.
• More than 1,000 authenticated secondary sources, such as company annual reports, fact books, press releases, journals, investor presentations, white papers, patents, and articles, have been leveraged to gather the data.
• We conducted more than 15 detailed primary interviews with market players across the value chain in all four regions and industry experts to obtain both qualitative and quantitative insights.

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Company Profiling

• Detailed profiling of additional market players (up to three players)
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Competitive Benchmarking

• Benchmarking of key players on the following parameters: Service portfolio, geographical reach, regional presence, and strategic alliances

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