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We are distributing a textbook on "Fluororesin Coating" from our company, a specialized manufacturer of surface treatment and fluororesin coatings! This document, consisting of 38 pages, is packed with content that connects the basics of fluororesins to their applications. With this single book, you can learn the fundamentals of fluororesins, practical case studies, and tips for selecting coatings. If you are interested, please download the document and take a look.

The "Teflon coating," which excels in non-stick properties, water repellency, and slip characteristics, and also has high heat resistance, is active in various fields of industry. Yoshida SKT signed a licensing agreement with DuPont in the United States in 1968. As a Licensed Industrial Applicator of Teflon coating, we have pursued processing technology. Teflon coating excels in non-stick properties, low friction (slip), water repellency, oil repellency, chemical resistance, heat resistance, and cold resistance, as well as electrical properties. It is required in various industrial fields such as automotive, semiconductors, chemical industry, medical, pharmaceuticals, food industry, and aerospace. At Yoshida SKT, we provide coatings that maximize the properties of Teflon resin tailored to our customers' objectives, suitable for their purposes, usage environments, and applications. *For more details, please refer to the PDF materials or feel free to contact us.

Do you have any concerns when choosing Teflon coating? - I don't really know where to start... - I'm not very familiar with Teflon coating in the first place... For those who are not well-versed in Teflon coating or want to learn more, we have prepared a "Teflon Coating Introduction Guide." Based on actual requests, we clearly explain what to consider in advance when choosing a coating and what you should be aware of. [Overview of the Guide] 1. Purpose of implementation 2. Coating targets 3. Usage environment and conditions As a result of properly selecting Teflon coating, we have received various feedback such as "paint adhesion has become difficult," "cleaning time has been reduced," and "defective products have decreased, improving productivity." If you are interested, you can download the guide from the link below or contact us through our website.

Here, we introduce part of the quality inspection for Teflon coating. ■ Product Inspection We verify whether the product meets the meeting notes and order specifications based on the meeting minutes, drawings, and individual items. ■ Coating Appearance Inspection The processed coating is visually observed under diffuse daylight (equivalent). In principle, any detection of blisters, cracks, peeling (including interlayer peeling), substrate exposure, or transparency will result in a failure. ■ Film Thickness Measurement Inspection Film thickness refers to the thickness of the processed coating measured using a thickness gauge adjusted based on the substrate board and a standard board placed on top. ■ Pin Hole Inspection Pinholes are a general term for tiny defects that can potentially be detected electrically. However, it typically refers to one type of tiny defect, specifically holes that resemble those made by a needle, found in the remnants of bubbles. *Inspection items may vary depending on the coating specifications. Please contact us for more details.

Differences in Types and Characteristics of Representative Resins for Teflon Coating and Fluororesin Coating ■ Resin Name PTFE (Polytetrafluoroethylene) ■ Characteristics It has the highest continuous use temperature of 260°C, and in addition to heat resistance, it excels in non-stick and low friction properties. ■ Alternative Name Tetrafluoroethylene, 4F ■ Resin Name PFA (Perfluoroalkoxyalkane Polymer) ■ Characteristics An improved resin of PTFE, it has the same continuous use temperature of 260°C as PTFE. It has a low thermal melt viscosity, allowing for a continuous coating with fewer pinholes that could not be achieved with PTFE, making it the best-performing fluororesin for corrosion-resistant coatings. Additionally, PFA is superior in non-stick properties compared to PTFE for certain applications, making it suitable for high-temperature release coatings. ■ Resin Name FEP (Perfluoroethylene Propylene Copolymer) ■ Characteristics An improved resin of PTFE, but with lower heat resistance than PTFE. It can achieve a smooth coating with fewer pinholes through firing. ■ Alternative Name 4F6F, Tetra-hexafluoride

Differences in the characteristics of representative Teflon fluoropolymers "PTFE" and "PFA" ■ Resin Name PTFE (Polytetrafluoroethylene) ■ Characteristics This is the first fluororesin discovered and developed. It has a continuous use temperature of 260°C, excellent heat resistance, low friction properties, and non-stick characteristics. It has a high melt viscosity, making injection molding difficult, but it is used as a coating for frying pans and hot plates. ■ Resin Name PFA (Perfluoroalkoxyalkane Polymer) ■ Characteristics This is an improved resin of PTFE, with the same continuous use temperature of 260°C. It has a low thermal melt viscosity, allowing for molding such as injection molding. It can achieve a coating with fewer pinholes, which was not possible with PTFE, making it the fluororesin with the best performance for corrosion-resistant coating materials, including chemical resistance and heat resistance. Additionally, PFA is superior in non-stick properties for certain applications compared to PTFE, and it is also used as a coating material for release coatings, being processed for items like the inner pot of rice cookers. *For more details, please download the PDF and check.

■ETFE (Ethylene Tetra Fluoro Ethylene copolymer) A copolymer of TFE and ethylene, it is a resin with excellent processability. Since it is not a perfluoropolymer, its chemical resistance is slightly lower. Melting point: 220-270℃ ■PVdF (Poly Vinylidene Fluoride) A homopolymer of vinylidene fluoride (VdF), it is hard and has the highest dielectric constant among fluoropolymers, dissolving in polar solvents at high temperatures. Melting point: 170-175℃ ■ECTFE (Ethylene Chloro Tri Fluoro Ethylene copolymer) A copolymer of chlorotrifluoroethylene (CTFE) and ethylene, it has excellent processability and superior flame resistance and hardness compared to ETFE. Melting point: 230-250℃ ■PCTFE (Poly Chloro Tri Fluoro Ethylene) A homopolymer of chlorotrifluoroethylene (CTFE), it is transparent and hard, with the lowest gas permeability among fluoropolymers. Melting point: 210-215℃ For more details, please download the PDF document or contact us.

■ The "Non-Stick Property" of Fluoropolymer Non-stick property refers to the characteristic of being easy to release and not adhere, or to adhere less, even to strongly adhesive substances. For example, fluoropolymers excel in water and oil repellency, have a large contact angle, and possess a property of being difficult to wet due to their molecular structure. The measure of wettability, "critical surface tension (γc)," is extremely low for fluoropolymers, making it easy for liquids to be repelled and difficult to wet. Coatings that utilize this functionality are effective for release applications, applications where adhesion needs to be minimized, and for simplifying cleaning. 【Reference Data on Non-Stick Property】 ■ Contact Angle of Water (°) PTFE ... 114 PFA ... 105-110 FEP ... 115 ETFE ... 96 ■ Contact Angle of n-HD (°) PTFE ... 34-45 PFA ... >45 FEP ... 41-45 ETFE ... 28 ■ Surface Free Energy of Solids (dyn/cm) PTFE ... 18.5 PFA ... 17.8 FEP ... 17.8 ETFE ... 22.1 *For detailed information on non-stick properties, please download the PDF or contact us.

■Types of Lubrication Lubrication can be broadly divided into liquid lubrication using liquids and solid lubrication using solids. A representative example of liquid lubrication is lubrication with oil. On the other hand, lubrication with fluororesin falls under the category of solid lubrication. ■Characteristics of Solid Lubrication Solid lubrication is used in cases where liquids cannot be used or when liquids evaporate or detach in a vacuum. For example, when sliding products, solid lubrication is useful in cases where liquid lubricants would dirty the products. ■Lubricity and Low Friction of Fluororesin (PTFE) Fluororesin has a low coefficient of friction and is used as a solid lubricant. Fluororesin PTFE is structured such that fluorine atoms surround carbon atoms without gaps. The free energy of the fluorine atoms on the molecular surface is low, and the molecules have a very small polarity due to their symmetrical structure. The low coefficient of friction of PTFE is believed to be influenced by this type of molecular structure. ■Reasons for the Low Coefficient of Friction of Fluororesin PTFE → For more details, please check the basic information section.

Why does fluoropolymer coating repel water? We will introduce the relationship between surface energy, non-stick properties, and water repellency. ■ The relationship between water droplets and surface energy The reason the surface of fluoropolymer coating repels water is that the surface tension of water acts strongly. The same principle applies to sticky substances. In other words, "difficult to wet = difficult to stick." The action of liquid surface tension is strongly related to the surface free energy of solids. Surface free energy is the force that tries to attract the molecules of the contacting counterpart. Water is a substance with higher surface tension compared to oil. When in contact with a solid that has the same surface free energy, oil tends to spread and wet more easily, while water tends to bead up and is harder to wet. The smaller the surface free energy of the solid compared to the liquid it contacts, and the greater the difference, the more difficult it becomes for the liquid to wet (stick). The surface of fluoropolymer coating has very low surface free energy, which allows it to repel not only water but also oil, making it an effective surface treatment for release purposes due to its low tendency to stick. For more details, please check the official Yoshida SKT website from the link below.

■What is the "Chemical Resistance" of Fluororesin? "Chemical resistance" refers to durability against various chemicals. The types of chemicals include acids, alkalis, and organic solvents, and it is said to have "chemical resistance" when it does not dissolve (dissolve), swell (swell), or react to them. Fluororesin is not affected by almost all chemicals. You can check the detailed explanation in the PDF document. ■INDEX 1. What is chemical resistance? 2. Effects of chemicals on resin 3. Reasons why Teflon fluororesin excels in chemical resistance 4. What can be done using chemical resistance *For more details, please download the document or contact us.

■ What is "corrosion resistance"? "Corrosion resistance" refers to the property of being less prone to corrosion reactions and oxidation. In the field of corrosion prevention, which requires corrosion (anti-corrosion) properties, terms such as "light anti-corrosion" and "heavy anti-corrosion" may be used depending on the degree of corrosiveness. You can find detailed information in the PDF document below. ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー 1. What is corrosion resistance? 2. How to prevent corrosion 3. Corrosion resistance of Teflon fluoropolymer coatings 4. Characteristics of Teflon fluoropolymer coatings for corrosion-resistant applications 4-1. No pinholes or defects in the coating film 4-2. Thickening of the coating film 5. What can be achieved by utilizing the corrosion resistance of Teflon fluoropolymer coatings ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー * For more details, you can download the document or view it at the link below. ▼ "Protecting the substrate from chemicals!" Explanation of the corrosion resistance of Teflon fluoropolymer coatings ▼

◆Features of Fluororesin Coating with Excellent Corrosion Resistance◆ ■Chemical Resistance of Fluororesin Fluororesin is chemically stable, so it is not affected by most acids, alkalis, or other chemical agents, and ions do not dissolve and leak out. ■Pinhole-Free Coating Technology By applying a fluororesin coating without electrical pinholes to substrates with shapes that cannot be lined with sheets or rotationally molded, we protect against highly corrosive liquids and gases such as acids and alkalis, and prevent the leaching of metal ions from the substrate. ■Prevention of Liquid Penetration and Excellent Blister Resistance Compared to standard fluororesin coatings, our MY lining significantly reduces blister formation and offers a lifespan over ten times longer, with a maximum film thickness of up to 2000μm possible due to our unique processing technology (depending on substrate conditions). With this technology, we provide fluororesin coatings with excellent corrosion resistance. *For more details, please refer to the catalog or contact us directly.

■ What is the degreasing process? It is the process of removing oils, fats, and dirt that are attached to the surface to be coated. ■ Issues arising from insufficient degreasing It can lead to problems such as the coating material repelling, poor adhesion of the paint film, and the occurrence of appearance defects like stains. ■ Types of degreasing methods - Air roasting - Solvent cleaning ■ Air roasting process The substrate is heated in a roasting furnace to a temperature above the coating processing temperature, allowing oils and other substances to be oxidized and burned off. Typically, roasting is performed for several hours at temperatures exceeding 400°C. ■ Advantages of air roasting - No toxic gases are generated during the decomposition of oils, which are broken down into water and carbon dioxide. - It can completely decompose all organic components that could cause problems during the coating firing process. - It can accommodate large products as long as they fit into the roasting furnace. Fluoropolymer coatings, which excel in non-stick properties, adhere firmly to the substrate and perform effectively when a proper degreasing process (surface preparation) is carried out. * For an overview of the fluoropolymer coating process, please download the PDF or feel free to consult us.

■What is blasting? Blasting is a surface treatment method that involves spraying blast materials (various abrasive particles) onto the surface of a product using compressed air or similar means to remove rust and dirt from the substrate surface. The particles that collide with the surface act as "impact" or "cutting." Although the energy of a single blast particle is minimal, the continuous bombardment of countless particles results in a significant effect on the surface. ■Blasting as a pre-treatment In addition to cleaning the surface, blasting increases the surface area through roughening, which generates an anchor effect that greatly enhances adhesion during coating processes. Therefore, it is extremely effective not only for fluoropolymer coatings but also as a pre-treatment for processes such as thermal spraying and plating. Additionally, blasting can improve the wettability of liquids. To fully realize the performance of fluoropolymer coatings, pre-treatment is a crucial process. At Yoshida SKT, we select blast materials and treatment methods suitable for coatings and substrates to process fluoropolymer coatings. *For more details, please check the link below or feel free to contact us.

■Non-stickiness: It refers to the property of being easily released from strongly adhesive substances, either not adhering at all or having a tendency to adhere less. ■Water repellency: It refers to the property of repelling liquids and not getting wet when they come into contact with the surface. 【Reference data for non-stickiness and water repellency】 ■Contact angle of water (°) PTFE ... 114 PFA ... 105-110 FEP ... 115 ETFE ... 96 ■Contact angle of n-HD (°) PTFE ... 34-45 PFA ... >45 FEP ... 41-45 ETFE ... 28 ■Surface free energy of solids (dyne/cm) PTFE ... 18.5 PFA ... 17.8 FEP ... 17.8 ETFE ... 22.1 ■Low friction: It has a slippery feel and a low coefficient of friction, providing excellent lubricity. 【Reference data for low friction】 ■Static friction coefficient (μ) PTFE ... 0.02-0.04 PFA ... 0.04-0.05 FEP ... 0.05-0.06 ETFE ... 0.07-0.08 *The values are general characteristics and are not guaranteed. *For more details, please contact us.

**Representative Types** ■ PTFE (Polytetrafluoroethylene) It has the highest continuous use temperature of 260°C and excels in non-stick and low friction properties. ■ PFA (Perfluoroalkoxyalkane Polymer) It has a low melt viscosity and can achieve a continuous coating with fewer pinholes than PTFE. It is the best-performing fluororesin for high-temperature corrosion resistance. ■ FEP (Perfluoroethylene Propylene Copolymer) An improved resin of PTFE, it has a lower continuous use temperature than PTFE but can achieve a smooth coating with fewer pinholes through sintering. ■ ETFE (Ethylene-Tetrafluoroethylene Copolymer) Due to its excellent mechanical properties, it is highly resistant to wear and is often used for anti-corrosion applications. ■ Modified Types ◎ High-temperature modified type ◎ Low-temperature modified type **Representative Processing Methods** ○ The enamel of fluororesin is applied using a painting machine or manually. ○ Fluororesin powder is applied using electrostatic or special painting machines. Coating processing is easily adaptable to complex shapes and is used in numerous industries. *For more details, please download the PDF and take a look.*

Types and Characteristics of Representative Resins for Teflon Coating and Fluororesin Coating ■ Resin Name PTFE (Polytetrafluoroethylene) ■ Characteristics It has the highest continuous use temperature of 260°C, and in addition to heat resistance, it also excels in non-stick properties and low friction characteristics. ■ Alternative Name Tetrafluoroethylene, 4F ■ Resin Name PFA (Perfluoroalkoxyalkane Polymer) ■ Characteristics An improved resin of PTFE, it has the same continuous use temperature of 260°C as PTFE. It has a low thermal melt viscosity, allowing for a continuous coating with fewer pinholes that could not be achieved with PTFE, making it the best-performing fluororesin for corrosion-resistant coatings. Additionally, PFA is superior in non-stick properties compared to PTFE for certain applications, making it suitable for high-temperature release coatings. ■ Resin Name FEP (Perfluoroethylene Propylene Copolymer) ■ Characteristics An improved resin of PTFE, but with lower heat resistance than PTFE. It can achieve a smooth coating with fewer pinholes through sintering. ■ Alternative Name 4F6F, Tetrafluoro-hexafluoropropylene

■Chemical Resistance of Teflon / Fluororesin Teflon resin has high chemical resistance and does not dissolve, swell, or react with most acids, alkalis, and organic solvents. ■Reasons for the Excellent Chemical Resistance of Teflon / Fluororesin A major reason for the excellent chemical resistance of Teflon resin and fluororesin is its stable molecular structure. Teflon resin and fluororesin have a molecular structure where carbon atoms and fluorine atoms are connected in a linear chain. The bond energy of the carbon-fluorine (C-F) bond is very strong among chemical bonds, and furthermore, the C-C bond between carbon atoms is completely covered by fluorine atoms in a helical manner. Therefore, even when in contact with chemicals or solvents, they remain inert and do not degrade or dissolve as a resin, which means they have excellent chemical resistance. ■Products Utilizing the Chemical Resistance of Teflon / Fluororesin The chemical resistance of Teflon resin and fluororesin is used in various products in the chemical industry, semiconductor field, and medical and pharmaceutical sectors, such as: - Various gaskets - Packing materials - Pipes and hoses - Storage tanks - Reaction vessels - Heat exchangers *For more details, please download the materials or refer to the link below.*

■Reasons why fluoropolymer (PTFE) excels in heat and cold resistance The molecular structure of PTFE consists of carbon-carbon (C-C) bonds surrounded completely by fluorine atoms (F). The breaking of C-C bonds or C-F bonds at high temperatures is one aspect of "PTFE degradation." The C-C bonds are less likely to break because they are protected by the fluorine atoms (F). The bond strength of C-F bonds within PTFE molecules is significantly greater than that of bonds between other atoms. Additionally, the high bond energy of C-F bonds is another reason for its excellent heat and cold resistance. ■Applications utilizing the heat and cold resistance of fluoropolymers In the case of fluoropolymer coatings, for example, baking molds utilize the non-stick properties provided by the coating to prevent baked goods from sticking to the mold. Furthermore, since it also possesses heat resistance, it can be safely used in applications such as baking in an oven. Additionally, in household irons, the heat plate is coated with fluoropolymer to take advantage of its smoothness and heat-resistant properties. For more details, please click the link or contact us.

"Fluororesin coating (Teflon coating)" is a surface treatment that imparts various properties of fluororesin to the surface of materials, achieving prevention of sticking and adhesion, reduction of friction, and protection of the materials. It exhibits excellent release properties even against strongly adhesive substances and is rarely affected by or corroded by chemicals such as acids and alkalis. The Teflon coating on household frying pans is an example of a fluororesin coating that utilizes the non-stick and heat-resistant characteristics of Teflon fluororesin to make it difficult for food to stick to the frying pan. 【Features and Effects】 ■ Non-stick: Excellent release properties even against strongly adhesive substances ■ Water and oil repellency: Effectively repels water and oil on the surface ■ Heat and cold resistance: Withstands high temperatures (up to 260°C) and low temperatures (down to -250°C) ■ Low friction: Has a low coefficient of friction, making it slippery ■ Chemical resistance: Rarely affected by or corroded by chemicals such as acids and alkalis ■ Electrical properties: High dielectric strength (resistance to dielectric breakdown), volume resistivity, and surface resistivity *For more details, please refer to the related links or feel free to contact us.

This is an introduction to one of the inspection processes for Teflon coating, the visual inspection. 【Three Points of Visual Inspection】 ■ Coating Processing Range We visually confirm whether the coating film after processing is in accordance with the discussed matters and your order by referring to the drawings and individual specifications. We mainly check the processing range of the coating and, if there are any masking specifications, we confirm the designated areas and ranges. ■ Confirmation of Specified Coating Materials We verify whether the processing specifications are in accordance with the discussed matters and the order form. This mainly involves checking the color tone of the coating and processing records. ■ Confirmation of Coating Film Quality We check the quality of the coating film. The method primarily involves visual inspection and touch. Depending on the size of any abnormalities, tools such as magnifying glasses are used to ensure that there are no defects in the coating film (such as cracks, foreign matter adhesion, blisters, peeling, or damage) across the entire surface of the film. *For more details on visual inspection, please visit our website via the link or contact us.*

Here, we will introduce the measurement inspection of Teflon coating thickness. When you consult about Teflon coating, if a thickness is agreed upon during the meeting, we will conduct a thickness measurement inspection during the post-processing inspection process to confirm whether the thickness has been processed according to the meeting or the order form. ■ Unit of Thickness In coating thickness measurement, the unit commonly used is "μm (micrometers)" = one-thousandth of a millimeter. ■ Specifications of Thickness The thickness varies depending on the specifications and applications. For fluororesin coatings, it is often around 20-50μm for general purposes and more than 300μm for corrosion-resistant applications. ■ Measurement Method In thickness measurement inspections, a thickness gauge is primarily used for confirmation. This method is a non-destructive type of inspection that does not damage the coating. The thickness gauge typically measures the thickness of the coating by pressing a probe, known as a "probe," vertically against the surface of the coating processed on the metal substrate. *For more details about the thickness measurement inspection, please visit our website via the link or contact us.

Why is it a problem if there are pinholes in the Teflon coating film in the first place? In a typical fluororesin coating (thickness: 20-50 μm), there are countless holes (pinholes) that are invisible to the eye and reach the substrate. For applications that require non-stick or slippery properties, these pinholes rarely have a negative impact on performance. However, in applications where corrosion resistance is required, chemicals can reach the substrate (metal) through the pinholes, causing corrosion and leading to holes or causing the coating to peel off. To eliminate pinholes, the coating can be thickened by applying multiple layers, ensuring that there are no pinholes that connect the coating surface to the substrate. At Yoshida SKT, we conduct inspections using insulation resistance meters, pinhole testers, and chemical detection methods according to the coating specifications and substrates. These methods are non-destructive tests that do not damage the coating film. *For more details on pinhole inspection, please visit our website via the link or contact us.*

■The "non-stick property" of fluoropolymer… Non-stick property refers to the characteristic of being easy to release and not adhere, or to adhere less, even to strongly adhesive substances. For example, fluoropolymers have excellent water and oil repellency, a large contact angle, and due to their molecular structure, they possess a property of being difficult to wet. The measure of wettability, "critical surface tension (γc)," is extremely low for fluoropolymers, making it easy for liquids to be repelled and difficult to wet. Coatings that utilize such functions are effective for release applications, applications where adhesion needs to be minimized, and for simplifying cleaning. 【Reference data on non-stick properties】 ■Surface free energy of solids (dyn/cm) PTFE…18.5 PFA…17.8 FEP…17.8 ETFE…22.1 Fluoropolymers have low surface treatment free energy and possess properties that make them difficult to bond with various liquids and solids. By coating with fluoropolymer, dirt is less likely to stick and becomes easier to clean. *For detailed information on fluoropolymer coatings and non-stick properties, please download the PDF or contact us.

■Is the chemical resistance of fluoropolymer high? Fluoropolymers have high chemical resistance and do not dissolve, swell, or react with most acids, alkalis, and organic solvents. ■Reasons for the high chemical resistance of fluoropolymers A major reason for the excellent chemical resistance of fluoropolymers is their stable molecular structure. Fluoropolymers are high molecular weight polymers with carbon atoms and fluorine atoms bonded in a linear chain structure. The bond energy between carbon and fluorine atoms (C-F) is very strong among chemical bonds, and furthermore, the C-C bond sections between carbon atoms are completely covered by fluorine atoms in a helical manner. Therefore, they remain inert when in contact with chemicals or solvents, and do not degrade or dissolve as a resin, which means they have excellent chemical resistance. ■Uses of fluoropolymers The chemical resistance of fluoropolymers is utilized in the chemical industry, semiconductor industry, and medical and pharmaceutical fields in products such as: - Various gaskets - Seals - Piping and hoses - Storage tanks - Reaction vessels - Heat exchangers *For more details, please download the materials or refer to the link below.

■Reasons why fluoropolymer (PTFE) excels in heat resistance and cold resistance The molecular structure of PTFE is such that fluorine atoms (F) surround the C-C bonds without any gaps. The breaking of C-C bonds and C-F bonds at high temperatures is one aspect of "PTFE degradation." The C-C bonds are less likely to break because they are protected by the surrounding fluorine atoms (F). The bond strength of C-F bonds within PTFE molecules is significantly greater than that of other atomic bonds. Additionally, the high bond energy of C-F bonds is another reason for its excellent heat and cold resistance. ■Applications utilizing the heat and cold resistance of fluoropolymers In the case of fluoropolymer coatings, for example, baking molds utilize the non-stick properties provided by the coating to prevent baked goods from sticking to the mold. Furthermore, since it also possesses heat resistance, it can be safely used in applications where it is baked in an oven. Additionally, in household irons, the heat plate is coated with fluoropolymer to take advantage of its smoothness and heat-resistant properties. For more details, please click the link or contact us.

There are various types of resin for fluoropolymer coatings, depending on the application environment. At Yoshida SKT, we specify materials and processing according to the product number. 'QCE-033M' is a type of PFA coating. Among fluoropolymer coatings, it is characterized by excellent non-stick properties, smoothness, and minimal defects. 【What is PFA (Perfluoroalkoxy Alkane Polymer)?】 ■Features It is an improved resin of PTFE, having the same continuous use temperature of 260°C as PTFE. With a low thermal melt viscosity, it can achieve a continuous film with fewer pinholes than PTFE, making it the highest-performing fluoropolymer for corrosion-resistant coatings. Additionally, PFA is superior in non-stick properties compared to PTFE for certain applications, and is used as a high-temperature release coating. For more details, please download the materials or contact us.

There are various types of resin for fluoropolymer coatings depending on the application environment. At Yoshida SKT, we specify materials and processing based on the product number. "ECK-033" is a type of modified fluoropolymer coating. It is characterized by excellent wear resistance and slip properties among fluoropolymer coatings. Modified fluoropolymer coatings form a coating film using engineering plastics or super engineering plastics combined with fluoropolymers. For more details, please download the materials or contact us.

There are various types of resin for fluoropolymer coatings, depending on the application environment. At Yoshida SKT, we specify materials and processing based on the product number. 'HBA-838' is a type of PFA coating. By processing it to a thicker film, it results in a coating without pinholes, making it suitable for applications that require corrosion resistance. 【What is PFA (Perfluoroalkoxyalkane Polymer)?】 PFA is an improved resin of PTFE, with the same continuous use temperature of 260°C. Its melting point is around 310°C, and it has a lower thermal melt viscosity than PTFE, allowing for a continuous film with fewer pinholes that could not be achieved with PTFE during coating. As a corrosion-resistant coating, it has the best performance among fluoropolymer coatings. Additionally, PFA can exhibit superior non-stick properties compared to PTFE depending on the substrate, making it widely used for non-stick and release coatings. *For more details, please download the materials or contact us.

There are various types of resin for fluoropolymer coatings depending on the application environment. At Yoshida SKT, we specify materials and processing according to the product number. "STP-HS" is a type of fluoropolymer coating designed to reduce contact area and is one of the "Super TP Coating Hemisphere Graphics." Super TP Coating uniquely forms a convex surface using only fluoropolymer, characterized by excellent release properties and slip resistance against adhesives. For more details, please download the materials or contact us.

There are various types of resin for fluoropolymer coatings depending on the application environment. At Yoshida SKT, we specify materials and processing based on the product number. "TP-753" is a type of fluoropolymer coating designed to reduce contact area, and is one of the "TP Coatings." TP Coatings are characterized by their ability to form a unique convex surface solely from fluoropolymer, offering excellent release properties and slip resistance against adhesive materials. For more details, please download the materials or contact us.

There are various types of resin for fluoropolymer coatings depending on the application environment. At Yoshida SKT, we specify materials and processing based on the product number. "TP-855" is a type of fluoropolymer coating designed to reduce contact area and is one of the "TP Coatings." TP Coatings are characterized by their ability to form unique convex surfaces solely from fluoropolymer, offering excellent release properties and slip resistance against adhesives. For more details, please download the materials or contact us.

We are currently offering a textbook that allows you to learn the basics of "fluoropolymer coating" from our company, a specialist manufacturer of surface treatment and fluoropolymer coatings! This document, consisting of 38 pages, is packed with content that connects the fundamentals of fluoropolymers to their applications. With this single book, you can learn the basics of fluoropolymers, practical case studies, and tips for selecting coatings. [Contents (excerpt)] ■ What is fluoropolymer? ■ Explanation of the characteristics of fluoropolymers ■ What is fluoropolymer coating? ■ Processing methods for fluoropolymer coatings ■ Tips for selecting fluoropolymer coatings ■ Suitable substrates for fluoropolymer coatings ■ Case studies of fluoropolymer coatings If you are interested, please download the document from the link below and take a look.

This explains the differences in characteristics between the fluoropolymer "PTFE" and "ETFE." ■Resin Name PTFE (Polytetrafluoroethylene) ■Characteristics It is the first resin discovered and developed among fluoropolymers. It has a continuous use temperature of 260°C, excellent heat resistance, low friction properties, and non-stick characteristics. Although it has a high melting viscosity, making injection molding difficult, it is used as a coating for frying pans and hot plates. ■Resin Name ETFE (Ethylene Tetrafluoroethylene Copolymer) ■Characteristics Unlike perfluorinated fluoropolymers, ETFE contains hydrogen atoms (H) in its molecular structure. Therefore, its chemical resistance and heat resistance are lower compared to PTFE and FEP, with a continuous use temperature of 150°C compared to PTFE's 260°C. On the other hand, ETFE has high mechanical strength and can be processed at low melting points, making it suitable for applications requiring corrosion lining and wear resistance. *For more details, please click on "PDF Download" or feel free to contact us.*

Fluoropolymer refers to a type of polymer that contains fluorine atoms as a major component. Fluorine is a very distinctive element, and its properties are prominently reflected in the polymer. Below, I will explain the main characteristics and common applications of fluoropolymers in detail. ■Characteristics Very low adhesion Fluoropolymers are generally very smooth and have almost no adhesion, which is why they are known as "non-stick" or "non-adhesive." High chemical resistance Fluoropolymers possess excellent chemical resistance. They show resistance to many corrosive substances and solvents, and have chemically stable properties. This makes them suitable for applications such as chemical containers, piping, and gaskets. High heat resistance Fluoropolymers have the ability to withstand high temperatures. In particular, PTFE can endure very high temperatures (around 260°C or 500°F). This property makes them suitable for applications that require use under high-temperature conditions. Electrical insulation Fluoropolymers have excellent electrical insulation properties. This is one of the reasons they are widely used as insulating materials for electronic components and cables.

PTFE (polytetrafluoroethylene) and PFA (perfluoroalkoxy alkane) are types of fluoropolymer that both exhibit excellent chemical resistance. PTFE and PFA are resistant to chemical substances and are stable against acids, alkalis, organic solvents, and corrosive gases. They do not react with most substances and do not corrode or degrade. As a result, they are widely used as chemical containers, piping, gaskets, and sealing materials. PFA has a lower melt viscosity compared to PTFE, making it relatively easy to mold and process. Therefore, it expands the range of applications, especially for coatings that require chemical resistance or for thick film processing. *For more detailed information on chemical resistance, please download the materials or contact us.*

Fluoroelastomers have C-F bonds in their copolymer structure, providing excellent chemical resistance, oil resistance, and durability among rubbers. A representative example is FKM. On the other hand, fluoropolymers are plastics that contain fluorine atoms in their structure, such as PTFE, FEP, and PFA. ■Differences in Characteristics 【Fluoroelastomers】 (FKM) They exhibit excellent resistance to petroleum-based oils and fuels. They are durable against ultraviolet rays and atmospheric pollutants, making them suitable for outdoor use. Generally, they can be used at temperatures up to about 230°C. 【Fluoropolymers】 (PTFE) They demonstrate resistance to many substances, including acids, alkalis, solvents, fuels, and organic materials with a high oxygen index. Due to their very smooth and highly non-stick nature, other materials are less likely to adhere to them. This is widely known as the characteristic of PTFE (polytetrafluoroethylene), which is famous under the trademark name Teflon. Fluoropolymers have excellent resistance to high temperatures and can typically be used at temperatures up to 260°C. *By applying fluoropolymer processing to fluoroelastomers, the surface can gain the properties of fluoropolymers. For more details, please contact us.

■Difference Between Teflon and Fluoropolymer Teflon is a trademark of Chemours and is a brand name for fluoropolymers. Fluoropolymers include various types such as PTFE, FEP, PFA, and ETFE, but Teflon is a trademark for some of these. Teflon is a registered trademark of DuPont, represented by the 'R mark', while Chemours uses the 'TM mark'. Teflon-coated frying pans have popularized the term "Teflon coating" in society. Nowadays, the name Teflon is more well-known than the term fluoropolymer. Other chemical manufacturers also produce fluoropolymers, which are marketed under different product names. Industrial Teflon processing can be done at factories that have entered into licensing agreements with Chemours (DuPont). Yoshida SKT signed a contract with DuPont in January 1968 to become a Licensed Industrial Applicator (designated factory for industrial coatings).

High-heat-resistant plastics are materials that possess characteristics suitable for use in high-temperature environments. These plastics generally have high melting points, excellent heat resistance, and chemical stability. ■ Polyimide (PI) Polyimide has very high heat resistance and can be used in environments up to 300°C. It is utilized in electronics, aerospace, and the automotive industry, particularly in situations where durability under high-temperature conditions and harsh environments is required. ■ Polyetheretherketone (PEEK) With a high heat resistance of 260°C, PEEK also offers chemical resistance and wear resistance, making it suitable for use in aerospace, medical, and energy industries. ■ Polyphenylene sulfide (PPS) PPS has high heat resistance and chemical resistance at 220°C and is used in the automotive industry, electronics, and industrial machinery. Fiber-reinforced types of PPS also have high wear resistance, making them suitable for mechanical parts. ■ Polytetrafluoroethylene (PTFE) PTFE has high heat resistance of 260°C, exhibits self-lubricating and non-stick properties, and has high chemical resistance, making it chemically stable. It is used in semiconductors, chemicals, medical applications, aerospace, and the automotive industry.

There are various types of fluorine coatings, even if we refer to them simply as such. Typical examples include PTFE, FEP, PFA, and ETFE. In practice, the heat resistance varies depending on the application, but the continuous use temperatures for fluororesins are defined. ■ Continuous Use Temperatures - PTFE: 260℃ - FEP: 200℃ - PFA: 260℃ - ETFE: 150℃ For example, when used as an anti-corrosion coating, the practical heat resistance will be at a much lower temperature. Additionally, when considering applications that involve friction or physical contact, further considerations are necessary. Fluorine coatings (fluororesin coatings) possess various properties such as non-stickiness, low friction, chemical resistance, electrical characteristics, and weather resistance, and it is essential to consider the type and thickness according to each application. *For more details, please click on "PDF Download" or feel free to contact us.

The difference between fluoropolymer and Teflon is the difference between a general name and a trademark. Fluoropolymers include various types such as PTFE, FEP, PFA, and ETFE. Teflon is a trademark of Chemours and is a brand name for some fluoropolymers. Therefore, even if they are referred to differently, such as fluoropolymer coating or Teflon processing, they may refer to the same coating. PTFE was discovered in 1938 by Dr. Plunkett of DuPont in the United States and was later marketed as Teflon PTFE. It later became famous for Teflon coating on frying pans, and the name Teflon became widely known. Currently, the Teflon trademark can only be used in factories that have entered into a licensing agreement with Chemours. Yoshida SKT entered into a contract with DuPont in January 1968 as a Licensed Industrial Applicator.

The technical document "Differences Between PTFE and PFA" provides a detailed explanation of PTFE, PFA, FEP, and ETFE, covering everything from molecular structure to properties. Fluoropolymers are well-known for their functionality, such as being non-stick and slippery, but many people may not be aware of their various types and differences. This single book allows you to thoroughly understand the differences and characteristics of each. If you are interested, please feel free to download it. [Contents (excerpt)] ■ Types and properties of fluoropolymers ■ Differences between PTFE and PFA / Overview of FEP and ETFE ■ Differences among four types of fluoropolymer coatings

There are various types of resin for fluoropolymer coatings depending on the application environment. At Yoshida SKT, we specify materials and processing based on the product number. 'STP-HS' is a type of fluoropolymer coating designed to reduce contact area and is one of the 'Super TP Coating Hemisphere Graphics'. Super TP Coating uniquely forms a convex surface using only fluoropolymer, characterized by excellent release properties and slip resistance against adhesives. For more details, please download the materials or contact us.

■Customer's Issue In vacuum forming of films, the formed film was difficult to detach from the mold, resulting in release failure. ■Background / Conditions for Choosing Treatment The cause was uneven heating and poor air release due to inadequate adhesion between the mold and the film. ■Adopted Coating Super TP Coating ■Achieved Effects The Super TP Coating forms a smooth convex surface with fluororesin. The convex surface of the coating created an appropriate gap between the mold and the film, improving air release and resolving the issue of uneven heating, resulting in better release properties. For details about the coating, please download the materials or contact us.