Silicone based Coated Film

Silicone-based Coated Film Market Outlook

The global silicone-based coated film market is projected to reach approximately USD 3.5 billion by 2035, growing at a compound annual growth rate (CAGR) of around 6.5% during the forecast period from 2025 to 2035. This growth can be attributed to the increasing demand for silicone-coated films in various applications across several industries including automotive, electronics, packaging, and medical. The rising trend of lightweight and durable materials in manufacturing, combined with advancements in silicone technology, is expected to further drive market expansion. Moreover, the growing emphasis on sustainability and eco-friendly products is propelling the adoption of silicone-coated films, as they offer superior chemical resistance and durability compared to traditional materials. The burgeoning e-commerce sector is also contributing positively to the demand for silicone-coated films due to their application in packaging and protective films.

Growth Factor of the Market

Several factors are driving the growth of the silicone-based coated film market. One of the primary growth factors is the increasing use of silicone materials in various industrial applications, where their unique properties such as flexibility, heat resistance, and superior performance under extreme conditions make them ideal for many scenarios. Additionally, the surge in demand for lightweight materials in industries such as automotive and aerospace is boosting the uptake of silicone-coated films, as manufacturers seek to enhance fuel efficiency and reduce emissions. Furthermore, innovations in silicone coating technologies are leading to improved product performance and expanding their application scope, which is attractive to many sectors. The rising trend of smart packaging and advancements in the electronics sector are also significant contributors to market growth, as industries pursue more sophisticated and reliable materials. Lastly, the push towards environmentally friendly manufacturing processes is encouraging the use of silicone based solutions, which are often favored for their lower environmental impact.

Key Highlights of the Market

• Projected market size of approximately USD 3.5 billion by 2035.
• Expected CAGR of around 6.5% during the forecast period 2025-2035.
• Increased adoption in the automotive and electronics industries.
• Rising demand for sustainable and eco-friendly packaging solutions.
• Technological advancements enhancing silicone coating performance.

By Product Type

Release Liners:

Release liners are an essential segment of the silicone-based coated film market, primarily used to provide easy peeling and application of adhesive materials. They serve as protective carriers for adhesive tapes, labels, and other sticky products. The demand for release liners is significantly driven by the growth in packaging and labeling industries, as they facilitate the efficient handling of adhesives and improve the overall production processes. Furthermore, the use of silicone-coated release liners enhances their performance characteristics, including temperature resistance and release properties, making them a preferred solution in various applications. Innovations in this segment are geared towards developing liners that can withstand harsher conditions, thus broadening their usability across different industries.

Adhesive Tapes:

Adhesive tapes represent another critical product type within the silicone-based coated film market. They are widely utilized for bonding, sealing, and insulation in several applications, including automotive, electronics, and construction. The inherent properties of silicone, such as excellent adhesion and temperature resistance, make silicone adhesive tapes highly sought-after for applications that require durability. The trend towards automation and compact designs in technology is further augmenting the demand for specialized adhesive tapes, often featuring silicone coatings that improve their performance. Additionally, as end-users increasingly prioritize efficiency and operational reliability, the market for these tapes is anticipated to witness substantial growth in the coming years.

Labels:

Silicone-coated films used for labels are gaining traction due to their durability and performance in various environments. They are particularly valued in industries that require high-quality labeling solutions, such as food and beverage, pharmaceuticals, and consumer goods. The unique properties of silicone coatings enable labels to adhere strongly while resisting moisture and extreme temperatures. The increasing need for compliance with labeling regulations in various sectors is also fuelling the demand for high-performance silicone labels. The ability to produce labels that are more sustainable, environmentally friendly, and customizable further enhances their appeal in the market, leading to increased adoption across multiple applications.

Protective Films:

Protective films made from silicone-coated materials are extensively utilized across various industries to provide surface protection and preserve product integrity during transportation and storage. Their inherent ability to resist scratches, UV radiation, and chemicals makes them a popular choice for protecting sensitive surfaces, particularly in the automotive and electronics sectors. The growing awareness of product protection and preservation is driving the demand for these protective films, as manufacturers seek to ensure product longevity and quality. Furthermore, innovations in this segment focus on developing films that are easy to apply and remove, enhancing their usability and market attractiveness.

Medical Films:

Medical films utilizing silicone coatings are becoming increasingly popular for applications in wound care, surgical drapes, and medical device manufacturing. The unique properties of silicone, such as biocompatibility and moisture management, make these films ideal for sensitive medical environments. The rising prevalence of chronic diseases and the consequent demand for advanced medical solutions is propelling the growth of silicone-coated medical films. Regulatory advancements and the need for safer, more efficient medical products are also significant factors driving this segment. The market is expected to expand further as innovative silicone formulations and coatings are developed to enhance performance and application versatility in the healthcare sector.

By Application

Automotive:

In the automotive sector, silicone-based coated films are increasingly employed due to their ability to withstand harsh environmental conditions, including extreme temperatures and moisture. They are utilized in applications such as interior and exterior trims, protective films, and adhesives. The growing trend towards vehicle lightweighting and improved fuel efficiency is driving the adoption of silicone films, as they offer enhanced performance characteristics over traditional materials. Furthermore, the increased focus on sustainability and the use of eco-friendly materials in automotive manufacturing are further boosting the demand for silicone coated solutions in this sector.

Electronics:

The electronics application segment is a significant driver of the silicone-based coated film market, with a focus on the development of insulating materials, adhesive tapes, and protective films for various electronic devices. Silicone materials are favored for their excellent dielectric properties and thermal stability, making them suitable for applications in circuit boards, LED lighting, and other electronic components. As the electronics industry continues to innovate, incorporating more compact and efficient designs, the need for reliable silicone-coated solutions that enhance performance and ensure product longevity is anticipated to rise, thus propelling the market forward.

Packaging:

Silicone-coated films are increasingly integral to the packaging industry, where they are employed in flexible packaging, labels, and protective wraps. Their superior barrier properties, moisture resistance, and durability make them ideal for food and consumer product packaging. The growing demand for convenience and sustainability in packaging solutions is driving the adoption of silicone-based films, as they offer enhanced protection and preservation. Additionally, the rise of e-commerce is further propelling the demand for reliable and innovative packaging solutions, making silicone-coated materials a preferred choice in this sector.

Medical:

In the medical application segment, silicone-based coated films are widely used in various healthcare products, including wound dressings, surgical drapes, and device components. The biocompatibility of silicone ensures that these films can be safely used in direct contact with the human body, while their moisture management properties enhance patient comfort and healing. The increasing focus on healthcare quality and the growing prevalence of chronic health conditions are fuelling the demand for high-performance silicone-coated medical films. As healthcare continues to evolve, advancements in silicone technology are expected to further drive growth in this segment.

Construction:

Silicone-based coated films are increasingly utilized in the construction industry for applications such as insulation, waterproofing, and protective coverings. Their resilient properties ensure that they can withstand exposure to various environmental factors, including moisture and UV radiation, making them ideal for long-lasting building solutions. The emphasis on energy efficiency and sustainable building practices is also driving the demand for silicone-coated products, as they contribute to better thermal insulation and energy conservation in structures. As the construction sector continues to embrace innovative materials and sustainable solutions, the role of silicone-based films is expected to expand significantly.

By Coating Method

Gravure Coating:

Gravure coating is a widely used method for applying silicone coatings onto various substrates, offering excellent uniformity and thickness control. This method is particularly popular in the production of high-quality films for labels and packaging due to its ability to achieve precise and consistent coating thickness. The gravure process allows for high-speed production runs, making it efficient for manufacturers focused on large volume outputs. The versatility of gravure coating in accommodating different substrate materials also contributes to its popularity in the silicone-based coated film market.

Flexographic Coating:

Flexographic coating is another prominent method utilized in the silicone-coated film sector, particularly for packaging applications. This technique employs flexible relief plates to transfer the silicone coating onto substrates, providing fast drying times and the capability to print in-line with other processes. The adaptability of flexographic coating makes it suitable for various materials, including porous and non-porous substrates. Its cost-effectiveness and ability to produce vibrant colors while maintaining superior coating quality make flexographic coating a preferred choice among manufacturers.

Screen Coating:

Screen coating is a method that involves forcing silicone through a mesh screen onto a substrate, allowing for precise application in specific areas. This technique is especially useful for producing films with selective coating patterns, which can be beneficial for specialized applications in the electronics and medical sectors. The screen coating method provides excellent control over the thickness of the silicone layer, enabling manufacturers to tailor products to meet specific performance needs. As industries continue to seek customized solutions, the demand for screen coated silicone films is expected to grow.

Air Knife Coating:

Air knife coating is a technique where a thin film of silicone is applied to a substrate using a high-velocity air stream that strips away excess material. This method is particularly advantageous for producing uniform coatings with minimal waste, making it an efficient choice for high-volume production. The air knife coating method also allows for quick drying times, which is essential for manufacturers aiming to accelerate their production processes. As the need for efficient and sustainable manufacturing practices rises, air knife coating is anticipated to gain traction in the silicone-based coated film market.

Curtain Coating:

Curtain coating involves allowing a curtain of silicone to flow down over a substrate, resulting in even and consistent coverage. This technique is particularly effective for coating wide substrates and is often used in the production of flexible films and foils. The curtain coating method is known for its high-speed application and minimal waste, making it an efficient option for manufacturers. As the industry continues to focus on productivity and performance, the adoption of curtain coating in silicone-coated films is expected to increase.

By Silicone Type

Solventless Silicone:

Solventless silicone is gaining significant traction in the silicone-based coated film market due to its eco-friendly properties and lower volatile organic compound (VOC) emissions. This type of silicone is increasingly preferred in applications where environmental regulations and safety standards are critical, such as in the healthcare and food packaging industries. Its unique formulation allows for enhanced adhesion and performance, making it suitable for a variety of applications. The increasing demand for sustainable products is expected to accelerate the growth of solventless silicone in the coming years.

Solvent-Based Silicone:

Solvent-based silicone remains a prominent category within the silicone-coated film market, known for its versatility and performance across a wide range of applications. This type of silicone is characterized by its strong adhesion properties and ability to form durable films, making it ideal for demanding environments such as automotive and electronics. However, the growing focus on reducing environmental impact has led to a gradual shift towards more sustainable alternatives. Nonetheless, solvent-based silicone continues to play a vital role in industries that require high-performance materials.

Water-Based Silicone:

Water-based silicone is increasingly being adopted in various applications due to its environmentally friendly nature and lower toxicity compared to solvent-based options. This type of silicone offers excellent performance characteristics, including good adhesion and flexibility, making it suitable for a variety of applications in packaging, medical, and consumer goods. The rising awareness of health and safety concerns related to chemicals is driving the demand for water-based silicone solutions. As manufacturers increasingly prioritize sustainability, the growth potential for water-based silicone in the coated film market is promising.

UV-Curable Silicone:

UV-curable silicone is gaining popularity due to its rapid curing capabilities and superior performance characteristics. This type of silicone is used in applications that require quick processing times and durable coatings, making it highly suitable for the automotive and electronics sectors. The ability to achieve high adhesion and excellent chemical resistance makes UV-curable silicone an attractive option for manufacturers looking to enhance product longevity and performance. With the increasing demand for efficient manufacturing processes, the growth of UV-curable silicone in the coated film market is expected to accelerate.

High Consistency Silicone:

High consistency silicone is characterized by its thick and stable structure, making it suitable for applications that require robust and durable coatings. This type of silicone is often used in applications such as gaskets, seals, and other demanding environments where flexibility and temperature resistance are crucial. The growing demand for high-performance materials in industries such as automotive, aerospace, and construction is driving the adoption of high consistency silicone solutions. As manufacturers continue to seek innovative materials to meet specific requirements, the market for high consistency silicone-coated films is anticipated to grow.

By Region

In the North American region, the silicone-based coated film market is expected to witness significant growth, reaching approximately USD 1.2 billion by 2035. This growth can be attributed to the strong presence of key manufacturing industries, particularly automotive and electronics, which are increasingly embracing silicone-coated solutions for their superior performance characteristics. The region is anticipated to grow at a CAGR of around 6.8%, driven by technological advancements and the increasing focus on lightweight materials. Furthermore, the rising demand for sustainable products in the United States and Canada is expected to further bolster the market as manufacturers shift towards eco-friendly coatings.

Europe is another significant region in the silicone-based coated film market, projected to reach approximately USD 1 billion by 2035. The growth in this region is primarily driven by the automotive and healthcare sectors, with an increasing emphasis on innovation and performance. The European market is expected to grow at a CAGR of around 6.2%, as manufacturers continue to focus on developing advanced silicone materials that are compliant with stringent regulations. Additionally, the growing trend towards sustainable packaging solutions is expected to amplify the demand for silicone-coated films in Europe, contributing to regional market expansion.

Opportunities

The silicone-based coated film market is poised for numerous opportunities as manufacturers increasingly seek innovative solutions to address the demands of modern industries. One of the key opportunities lies in the medical sector, where the ongoing development of advanced medical devices and packaging solutions is driving the demand for high-performance silicone-coated films. With the increasing prevalence of chronic diseases and the rise of telemedicine, the need for reliable and biocompatible materials is expected to grow significantly. This presents manufacturers with the opportunity to develop specialized silicone coatings that meet the unique requirements of the healthcare industry, thus enhancing their market position.

Another notable opportunity for the silicone-based coated film market is in the realm of sustainable packaging. With consumers becoming more environmentally conscious and demanding eco-friendly solutions, manufacturers have the chance to innovate and develop silicone-coated films that are recyclable, biodegradable, or made from renewable resources. The increasing regulations aimed at reducing plastic waste further emphasize the need for sustainable packaging solutions, creating a vast market potential for silicone-coated films in various packaging applications. By investing in research and development, companies can capitalize on this trend and establish themselves as leaders in the sustainable packaging movement.

Threats

Despite the promising growth prospects, the silicone-based coated film market faces several threats that could impact its expansion. One of the primary challenges is the volatility of raw material prices, particularly silicone and other additives used in the production of coated films. Fluctuations in prices can squeeze profit margins for manufacturers, leading to increased costs for end-users and potentially hindering market growth. Additionally, the emergence of alternative materials and coatings presents a competitive threat, as industries may opt for cheaper or more readily available substitutes. This necessitates continuous innovation and improvement in silicone-based films to maintain market relevance and capture consumer interest.

Another significant threat to the silicone-based coated film market is the increasing regulatory pressure surrounding environmental sustainability. As governments around the world implement stricter regulations on chemical usage and waste management, manufacturers may face challenges in complying with new guidelines. This could lead to increased production costs and necessitate changes in manufacturing processes. Furthermore, the growing trend towards sustainability may prompt industries to seek greener alternatives, which could pose a threat to traditional silicone coatings. Manufacturers will need to adapt to these regulatory changes and invest in developing more sustainable product offerings to stay competitive in the evolving market landscape.

Competitor Outlook

• 3M Company
• Wacker Chemie AG
• Dow Inc.
• Elkem ASA
• Momentive Performance Materials Inc.
• Silicone Solutions Inc.
• Saint-Gobain S.A.
• Polymer Technologies Inc.
• H.B. Fuller Company
• Henkel AG & Co. KGaA
• Chomerics, a division of Parker Hannifin Corp.
• Schneider Electric SE
• Kaneka Corporation
• Fujifilm Holdings Corporation
• Shin-Etsu Chemical Co., Ltd.

The competitive landscape of the silicone-based coated film market is characterized by the presence of several global and regional players striving to expand their market share through innovations and strategic collaborations. Major companies are continually investing in research and development to improve their product offerings and differentiate themselves from competitors. These investments often focus on enhancing the performance characteristics of silicone-coated films, such as improving durability, adhesion, and environmental sustainability. As industries increasingly demand customized solutions, manufacturers are also adapting their products to meet specific customer requirements, thereby increasing their competitiveness in the market.

3M Company is a leading player in the silicone-based coated film market, known for its advanced technological solutions and extensive product portfolio. The company's commitment to innovation and sustainability is reflected in its development of environmentally friendly silicone coatings that cater to various industries, including automotive, electronics, and healthcare. 3M's global presence and strong distribution network enable it to effectively serve a diverse range of customers, further enhancing its competitive position in the market.

Another key competitor, Dow Inc., has established itself as a prominent player in the silicone materials sector, offering a wide array of silicone-based coated films for numerous applications. The company focuses on developing high-performance products that meet stringent industry standards, particularly in automotive and medical applications. Dow's commitment to sustainability and responsible sourcing practices allows it to appeal to environmentally conscious consumers, positioning it well in the evolving market landscape. Additionally, partnerships with key stakeholders in various sectors further bolster Dow's market presence and growth potential.

• 1 Appendix

  • 1.1 List of Tables
  • 1.2 List of Figures

• 2 Introduction

  • 2.1 Market Definition
  • 2.2 Scope of the Report
  • 2.3 Study Assumptions
  • 2.4 Base Currency & Forecast Periods

• 3 Market Dynamics

  • 3.1 Market Growth Factors
  • 3.2 Economic & Global Events
  • 3.3 Innovation Trends
  • 3.4 Supply Chain Analysis

• 4 Consumer Behavior

  • 4.1 Market Trends
  • 4.2 Pricing Analysis
  • 4.3 Buyer Insights

• 5 Key Player Profiles

  • 5.1 Dow Inc.
    • 5.1.1 Business Overview
    • 5.1.2 Products & Services
    • 5.1.3 Financials
    • 5.1.4 Recent Developments
    • 5.1.5 SWOT Analysis
  • 5.2 Elkem ASA
    • 5.2.1 Business Overview
    • 5.2.2 Products & Services
    • 5.2.3 Financials
    • 5.2.4 Recent Developments
    • 5.2.5 SWOT Analysis
  • 5.3 3M Company
    • 5.3.1 Business Overview
    • 5.3.2 Products & Services
    • 5.3.3 Financials
    • 5.3.4 Recent Developments
    • 5.3.5 SWOT Analysis
  • 5.4 Wacker Chemie AG
    • 5.4.1 Business Overview
    • 5.4.2 Products & Services
    • 5.4.3 Financials
    • 5.4.4 Recent Developments
    • 5.4.5 SWOT Analysis
  • 5.5 Saint-Gobain S.A.
    • 5.5.1 Business Overview
    • 5.5.2 Products & Services
    • 5.5.3 Financials
    • 5.5.4 Recent Developments
    • 5.5.5 SWOT Analysis
  • 5.6 Kaneka Corporation
    • 5.6.1 Business Overview
    • 5.6.2 Products & Services
    • 5.6.3 Financials
    • 5.6.4 Recent Developments
    • 5.6.5 SWOT Analysis
  • 5.7 H.B. Fuller Company
    • 5.7.1 Business Overview
    • 5.7.2 Products & Services
    • 5.7.3 Financials
    • 5.7.4 Recent Developments
    • 5.7.5 SWOT Analysis
  • 5.8 Henkel AG & Co. KGaA
    • 5.8.1 Business Overview
    • 5.8.2 Products & Services
    • 5.8.3 Financials
    • 5.8.4 Recent Developments
    • 5.8.5 SWOT Analysis
  • 5.9 Schneider Electric SE
    • 5.9.1 Business Overview
    • 5.9.2 Products & Services
    • 5.9.3 Financials
    • 5.9.4 Recent Developments
    • 5.9.5 SWOT Analysis
  • 5.10 Silicone Solutions Inc.
    • 5.10.1 Business Overview
    • 5.10.2 Products & Services
    • 5.10.3 Financials
    • 5.10.4 Recent Developments
    • 5.10.5 SWOT Analysis
  • 5.11 Polymer Technologies Inc.
    • 5.11.1 Business Overview
    • 5.11.2 Products & Services
    • 5.11.3 Financials
    • 5.11.4 Recent Developments
    • 5.11.5 SWOT Analysis
  • 5.12 Shin-Etsu Chemical Co., Ltd.
    • 5.12.1 Business Overview
    • 5.12.2 Products & Services
    • 5.12.3 Financials
    • 5.12.4 Recent Developments
    • 5.12.5 SWOT Analysis
  • 5.13 Fujifilm Holdings Corporation
    • 5.13.1 Business Overview
    • 5.13.2 Products & Services
    • 5.13.3 Financials
    • 5.13.4 Recent Developments
    • 5.13.5 SWOT Analysis
  • 5.14 Momentive Performance Materials Inc.
    • 5.14.1 Business Overview
    • 5.14.2 Products & Services
    • 5.14.3 Financials
    • 5.14.4 Recent Developments
    • 5.14.5 SWOT Analysis
  • 5.15 Chomerics, a division of Parker Hannifin Corp.
    • 5.15.1 Business Overview
    • 5.15.2 Products & Services
    • 5.15.3 Financials
    • 5.15.4 Recent Developments
    • 5.15.5 SWOT Analysis

• 6 Market Segmentation

  • 6.1 Silicone based Coated Film Market, By Application
    • 6.1.1 Automotive
    • 6.1.2 Electronics
    • 6.1.3 Packaging
    • 6.1.4 Medical
    • 6.1.5 Construction
  • 6.2 Silicone based Coated Film Market, By Product Type
    • 6.2.1 Release Liners
    • 6.2.2 Adhesive Tapes
    • 6.2.3 Labels
    • 6.2.4 Protective Films
    • 6.2.5 Medical Films
  • 6.3 Silicone based Coated Film Market, By Silicone Type
    • 6.3.1 Solventless Silicone
    • 6.3.2 Solvent-Based Silicone
    • 6.3.3 Water-Based Silicone
    • 6.3.4 UV-Curable Silicone
    • 6.3.5 High Consistency Silicone
  • 6.4 Silicone based Coated Film Market, By Coating Method
    • 6.4.1 Gravure Coating
    • 6.4.2 Flexographic Coating
    • 6.4.3 Screen Coating
    • 6.4.4 Air Knife Coating
    • 6.4.5 Curtain Coating

• 7 Competitive Analysis

  • 7.1 Key Player Comparison
  • 7.2 Market Share Analysis
  • 7.3 Investment Trends
  • 7.4 SWOT Analysis

• 8 Research Methodology

  • 8.1 Analysis Design
  • 8.2 Research Phases
  • 8.3 Study Timeline

• 9 Future Market Outlook

  • 9.1 Growth Forecast
  • 9.2 Market Evolution

• 10 Geographical Overview

  • 10.1 Europe - Market Analysis
    • 10.1.1 By Country
      • 10.1.1.1 UK
      • 10.1.1.2 France
      • 10.1.1.3 Germany
      • 10.1.1.4 Spain
      • 10.1.1.5 Italy
  • 10.2 Asia Pacific - Market Analysis
    • 10.2.1 By Country
      • 10.2.1.1 India
      • 10.2.1.2 China
      • 10.2.1.3 Japan
      • 10.2.1.4 South Korea
  • 10.3 Latin America - Market Analysis
    • 10.3.1 By Country
      • 10.3.1.1 Brazil
      • 10.3.1.2 Argentina
      • 10.3.1.3 Mexico
  • 10.4 North America - Market Analysis
    • 10.4.1 By Country
      • 10.4.1.1 USA
      • 10.4.1.2 Canada
  • 10.5 Middle East & Africa - Market Analysis
    • 10.5.1 By Country
      • 10.5.1.1 Middle East
      • 10.5.1.2 Africa
  • 10.6 Silicone based Coated Film Market by Region

• 11 Global Economic Factors

  • 11.1 Inflation Impact
  • 11.2 Trade Policies

• 12 Technology & Innovation

  • 12.1 Emerging Technologies
  • 12.2 AI & Digital Trends
  • 12.3 Patent Research

• 13 Investment & Market Growth

  • 13.1 Funding Trends
  • 13.2 Future Market Projections

• 14 Market Overview & Key Insights

  • 14.1 Executive Summary
  • 14.2 Key Trends
  • 14.3 Market Challenges
  • 14.4 Regulatory Landscape

Segments Analyzed in the Report

The global Silicone based Coated Film market is categorized based on

By Product Type

• Release Liners
• Adhesive Tapes
• Labels
• Protective Films
• Medical Films

By Application

• Automotive
• Electronics
• Packaging
• Medical
• Construction

By Coating Method

• Gravure Coating
• Flexographic Coating
• Screen Coating
• Air Knife Coating
• Curtain Coating

By Silicone Type

• Solventless Silicone
• Solvent-Based Silicone
• Water-Based Silicone
• UV-Curable Silicone
• High Consistency Silicone

By Region

• North America
• Europe
• Asia Pacific
• Latin America
• Middle East & Africa

Key Players

• 3M Company
• Wacker Chemie AG
• Dow Inc.
• Elkem ASA
• Momentive Performance Materials Inc.
• Silicone Solutions Inc.
• Saint-Gobain S.A.
• Polymer Technologies Inc.
• H.B. Fuller Company
• Henkel AG & Co. KGaA
• Chomerics, a division of Parker Hannifin Corp.
• Schneider Electric SE
• Kaneka Corporation
• Fujifilm Holdings Corporation
• Shin-Etsu Chemical Co., Ltd.