吉田ＳＫＴ List of Products and Services

■What is Lining? Lining is a method of protecting a substrate with a relatively thick film to enhance corrosion resistance. The lining materials primarily used are "rubber," "resin," and "glass." In linings that require corrosion resistance, a coating without pinholes is crucial. ■What is Fluororesin Lining? Fluororesin lining is one type of "resin lining." Resin lining includes those utilizing "polyethylene" and "nylon" resins, as well as "FRP lining," which combines glass fibers and resin. Among these, "fluororesin" is a material that is less susceptible to chemicals in harsh environments. ■Types of Fluororesin Lining Types of fluororesin lining include PTFE lining, PFA lining, and ETFE lining. Each lining requires appropriate selection based on the usage environment, method, and application. ■Main Fluororesin Lining Methods There are three main methods: 1. "Sheet Lining" 2. "Baked Coating" 3. "Roto Lining" *When considering lining, please check the materials and contact us for inquiries.

PTFE lining is characterized by the use of pre-formed PTFE sheets and pipes, and it is also referred to as PTFE sheet lining. Since PTFE has non-stick properties, it cannot usually be adhered with adhesives. Lining sheets are used that have been processed to allow adhesion on one side during or after molding (adhesive lining). ■ Advantages of PTFE Lining By using molded sheets, it is possible to create thickness, making it suitable for use in more demanding environments. Additionally, it is characterized by excellent gas permeability. ■ Disadvantages of PTFE Lining PTFE lining is difficult with baked coatings, so the usable temperature depends on the heat resistance of the adhesive. Furthermore, its use in negative pressure environments is generally not recommended. Yoshida SKT offers lining sheet sales and lining construction services. *For more details on lining, please check the materials or feel free to contact us.

PFA lining offers a variety of construction methods compared to PTFE lining and is characterized by its ability to be processed into various substrate shapes. ■Advantages of PFA Lining PFA lining can be processed mainly through three methods: "sheet lining," "electrostatic coating (baked coating)," and "rotational molding (rotolining)." Therefore, it is possible to create linings that accommodate various substrate shapes. ■Disadvantages of PFA Lining In some usage conditions, the lifespan may be shorter compared to PTFE sheet lining. It is necessary to choose carefully, taking into account temperature conditions, pressure conditions, and the type and concentration of the contact chemicals. Please refer to the materials for the characteristics, advantages, and disadvantages of each processing method. *If you have any questions about fluoropolymer lining, please feel free to contact us.

ETFE lining is a type of fluoropolymer lining that is primarily processed using techniques such as powder coating and rotational molding (rotolining). ■ Advantages of ETFE Lining ETFE has a low melting point and excellent processability, allowing for thick film processing on various shapes of substrates. ■ Disadvantages of ETFE Lining On the other hand, because its molecular structure contains hydrogen (H), it has inferior heat resistance and chemical resistance compared to PTFE. The choice of materials and methods for lining needs to be tailored to the application, environment, and substrate shape. Yoshida SKT offers powder coating and rotational molding (rotolining) for ETFE lining. *Please feel free to contact us when considering lining options.

In fluororesin sheet lining processing, there are two methods: "adhesive lining," where sheets made of PTFE or PFA are processed to allow one side to be bonded using a special method and then adhered to the substrate with adhesive, and "loose lining," a processing method like lining pipes where the liner is not bonded to the substrate. Sheet lining can process thicker linings compared to many other fluororesin lining methods. This results in excellent corrosion resistance among various fluororesin linings. On the other hand, the adhesion strength with the substrate depends on the adhesive's bonding power, so it generally does not accommodate use in negative pressure environments. Negative pressure applications can be addressed with other methods such as baked lining or roto-lining. *You can download a document summarizing the details of the lining. Please make use of it. *For more information, please click on "PDF Download" or feel free to contact us.

【Fluororesin Sheet Lining Processing】 Fluororesin sheet lining involves adhering a fluororesin sheet to a substrate using adhesives, and welding the seams with fluororesin to cover the substrate. (Adhesive lining) ■ Features of Fluororesin Sheet Lining Fluororesin is one of the resin materials that excels in chemical resistance and heat resistance. Fluororesin sheet lining is characterized by its ability to achieve thick lining processing, making it highly resistant to corrosion among various fluororesin lining methods. On the other hand, since the process includes welding the seams of the sheets, there may be steps on the lining surface. ■ Overview of Processing Fluororesin sheets, pre-cut to match the shape of the substrate, are adhered to the substrate, and the seams are welded. ■ Processing Thickness 2 to 4 mm *We have prepared materials summarizing comparisons and details of fluororesin lining. Please feel free to utilize them.

【Fluororesin Lining Processing Steps】 1. Acceptance We will inspect the substrate. If there are any issues that may affect the thick film processing, we may request corrections. 2. Degreasing Treatment [Preheating] The substrate is heated in a furnace to thermally decompose oils and dirt at a temperature higher than the firing temperature. 3. Surface Preparation [Blasting] The processing surface is blasted to remove rust, dirt, etc., and to create a rough surface. 4. Primer Coating A primer is applied to enhance the adhesion between the substrate and the fluororesin. 5. Firing The primer is cured in the furnace. 6. Coating [Powder Coating] Fluororesin powder is applied using electrostatic or special coating equipment. 7. Firing The fluororesin is heated to melt the resin and form a coating. *The size of the substrate that can be processed is determined by the size of the furnace. 8. Repetition Steps (6) to (7) are repeated to increase the coating thickness until the desired functionality is achieved. 9. Inspection We will inspect whether the processing meets the specifications and agreements. *The process is almost the same as fluororesin coating. *Please download the document summarizing the details of the lining for your reference.

Fluororesin baked lining is a lining technology that forms a film through the processes of painting and baking. Compared to other lining methods, it can flexibly adapt to various shapes and operating environments, making it suitable for diverse industrial fields. 【Advantages】 - Applicability to complex-shaped components - High resistance suitable for use in vacuum environments 【Disadvantages】 - Limited types of fluororesins available (such as PFA, FEP, ETFE, etc.) - Difficulties in thick film processing compared to fluororesin sheet lining You can gain a deeper understanding of the processing details and various advantages and disadvantages through the provided materials. If you have any questions or uncertainties regarding fluororesin lining, please feel free to contact us.

【Fluororesin Sheet Lining Processing Procedure】 ■ Acceptance The base material (cylinder body) is checked against the order form, drawings, specifications, etc., to confirm whether it has a suitable shape for lining. ■ Sandblasting The lining surface is sandblasted to remove rust, dirt, etc., and is roughened to a texture suitable for lining. ■ Sheet Cutting The lining sheet material is cut based on the welding development drawing. ■ Attachment Adhesive is applied to the lining area of the base material (cylinder body) and the back side of the lining material, and they are adhered together. ■ Edge Preparation The welding joint areas, left and right, and depth are evenly prepared, and excess adhesive in the gaps is removed. ■ Welding Butt welding Tape welding ■ Process Inspection A pinhole test is conducted after butt welding. A pinhole test is conducted after tape welding. *You can download materials summarizing the details of the lining. Please make use of them.

"MY Lining®" is a corrosion-resistant lining that significantly improves permeation resistance compared to standard PFA. - It offers a lifespan that is expected to be several dozen times longer than conventional products (compared to our coatings). - It is suitable for environments that could not be used before or places where the previous lifespan was unsatisfactory. - Lining can be applied to complex shapes such as eye plates and stirrers. 【Features】 ■ Dramatic improvement in permeation resistance performance (compared to our products) ■ Thick film processing is possible (MAX 2000μm) ■ Strong adhesion (vacuum resistance) ■ Seamless integrated processing ■ Lining can be applied to complex shapes such as eye plates and stirrers *For more details, please refer to the PDF document or feel free to contact us.

Roto-lining is a coating method that uniformly adheres fluororesin while rotating a hollow substrate in three dimensions. It can form a seamless coating on the inner surfaces of tubular components and devices, such as irregular pipes and strainers, as well as on the inner walls of small pumps and tanks. Since it allows for thick film processing, it achieves excellent durability. Additionally, the good adhesion of the coating helps to suppress the permeation of chemicals. *For more details, please contact us.

"MY Lining(R)" is a corrosion-resistant lining that significantly improves permeation resistance compared to standard PFA. It offers a lifespan that is expected to be several dozen times longer than that of conventional products (according to our coatings). It is suitable for environments that could not be used before and for places where the previous lifespan was unsatisfactory. It can also be lined in complex shapes such as eye plates and stirrers. 【Features】 ■ Dramatic improvement in permeation resistance performance (compared to our products) ■ Thick film processing is possible (MAX 2000μm) ■ Strong adhesion (vacuum resistance) ■ Seamless integrated processing ■ Can be lined in complex shapes such as eye plates and search machines *For more details, please refer to the PDF document or feel free to contact us.

Lining technology is an essential means to protect metals from the corrosive elements of "water, oxygen, and electricity" and to enhance durability. Metals are very convenient because they are easy to process and can be selected for various applications, but they have a significant drawback of being susceptible to corrosion. To solve this problem, processing linings allows metal products to be used in various environments. In particular, highly corrosion-resistant fluororesin linings are gaining attention in the field of heavy corrosion prevention due to their excellent properties. This document provides a detailed explanation of the various types of linings, especially the effects of fluororesin linings. Please take this opportunity to download and check it out.

■What is Teflon Lining? Teflon is a trademark of Chemours, and generally refers to fluororesin lining. Fluororesin is particularly excellent in chemical stability among various lining materials. Therefore, it is widely used in fields such as chemicals, semiconductors, and pharmaceuticals, where heavy corrosion resistance and purity are required. ■One Type of Resin Lining Fluororesin lining is one type of "resin lining." Resin lining includes those using "polyethylene" and "nylon" resins, as well as "FRP lining," which combines glass fibers and resin. Among these, "fluororesin" is a material that is less susceptible to chemicals in harsh environments. ■Types of Fluororesin Lining Types of fluororesin lining include PTFE lining, PFA lining, and ETFE lining. Each lining requires appropriate selection based on the usage environment, construction method, and application. ■Main Fluororesin Lining Methods There are three main methods: - "Sheet Lining" - "Baked Coating" - "Roto Lining" *When considering lining, please check the materials and contact us.

Fluororesin is a material that exhibits excellent chemical resistance to almost all chemicals. Hydrochloric acid is a strong acid that can dissolve many metals, but fluororesin does not dissolve in hydrochloric acid. Fluororesin is generally not affected by hydrochloric acid on its own; however, caution is necessary when used as linings or coatings intended to protect metals. Hydrochloric acid can penetrate fluororesin linings or coatings depending on its concentration and temperature. This penetration can lead to blistering, which impairs corrosion resistance. Additionally, thin fluororesin coatings may leave pinholes, allowing hydrochloric acid to infiltrate and directly corrode the substrate. If you want to protect metals from chemical solutions like hydrochloric acid, please consult us when considering measures involving fluororesin.

■Difference Between Lining and Coating Lining is a method that protects the substrate with a relatively thick film, enhancing its corrosion resistance. The differences from coating include the thickness of the film, the presence of pinholes, and the intended use. There are no clear standards, but thick films used for corrosion protection are referred to as lining. ■What is Fluororesin Coating? Coating is a surface treatment technology that can impart the properties of fluororesin to the surface of a substrate, primarily using a baking paint method. The film thickness is generally around several tens of micrometers. ■What is Fluororesin Lining? Fluororesin lining can be processed using the same method as coating. It is particularly used for corrosion protection applications that leverage chemical resistance, and the film thickness is several hundred micrometers, making it thicker than coating. Additionally, to enhance corrosion resistance, processing without pinholes is possible. *You can download a document summarizing information about lining. *For more details, please click on "PDF Download" or feel free to contact us.

Benefits of Fluororesin Lining for Stainless Steel Tanks ■ Chemical Resistance Fluororesin has strong resistance to chemicals such as acids and alkalis. It prevents corrosion and deterioration of the tank, allowing for safe use when handling chemicals and substances. ■ Non-Stick Properties Fluororesin has a property that makes it difficult for liquids like water and oil to adhere. This facilitates the cleaning and discharge of liquids within the tank. Additionally, the reduced contact area between the liquid and the tank can also help prevent corrosion and deterioration. ■ Durability Fluororesin has excellent heat resistance. The lining film is thick, providing the advantage of maintaining performance even after long-term use. 【Applications】 - Food Processing Safely store acidic and alkaline foods. - Chemical Industry Safely store highly corrosive chemicals. - Medical Field Hygienically store liquids such as blood and pharmaceuticals. In this way, fluororesin lining for stainless steel tanks demonstrates high effectiveness across various fields. *Please download the document summarizing the details of the lining for your reference.

Fluororesin lining is an important technology for protecting materials from damage caused by corrosion and chemicals. The main types of fluororesin lining include PTFE, PFA, and ETFE, each possessing specific properties suitable for particular applications and environments. Types of fluororesin lining: - PTFE lining: Excellent non-stick and heat resistance, with resistance to almost all chemicals. - PFA lining: Offers more options for processing methods compared to PTFE, accommodating various shapes of substrates. - ETFE lining: Combines strength and chemical resistance, with a wide range of substrate shapes that can be processed similarly to PFA. Fluororesin lining methods: - Sheet lining: A method of adhering fluororesin sheets to substrates, allowing for thicker linings. - Powder coating: A method of applying fluororesin as a powder coating and forming a film in a sintering furnace. - Rotolining: A method of applying lining material while rotating, forming a uniform film. It is suitable for use under harsh chemical conditions, such as in chemical plants and semiconductor manufacturing processes, and can protect materials over a long period. Please check the materials and contact us for further consideration.

■What is Fluororesin Lining? Fluororesin lining is one type of "resin lining." Resin lining includes those utilizing "polyethylene" and "nylon" resins, as well as "FRP lining," which combines glass fibers with resin. Among these, "fluororesin" is a material that is resistant to chemical corrosion in harsh environments. ■Types of Fluororesin Lining Types of fluororesin lining include PTFE lining, PFA lining, and ETFE lining. Each lining requires appropriate selection based on the usage environment, construction method, and application. ■Main Fluororesin Lining Methods There are three main methods: "sheet lining," "baked coating," and "rotolining." ■Various Lining Methods At Yoshida SKT, we can accommodate various processing methods according to the shape and thickness of the material, not only based on material differences but also using "sheet lining" with fluororesin sheets, "PFA lining" with baked coatings, and "rotolining" using rotational molding. *When considering lining, please check the materials and contact us for inquiries.

ETFE coating is a type of fluoropolymer coating that is primarily processed using techniques such as powder coating and rotational molding. ■ What is ETFE Coating? ETFE is a type of fluoropolymer, specifically a copolymer of tetrafluoroethylene and ethylene. It is mainly processed using powder coating technology and is considered a relatively thick coating among fluoropolymer coatings. Therefore, it is commonly referred to as ETFE lining. ■ Advantages of ETFE Coating ETFE has a low melting point and excellent processability, allowing for thick coatings on various substrate shapes. ■ Disadvantages of ETFE Coating On the other hand, because its molecular structure contains hydrogen (H), its heat resistance and chemical resistance are inferior compared to PTFE. ETFE coating requires the selection of materials and methods according to the application, environment, and substrate shape. Yoshida SKT offers ETFE coating services through powder coating and rotational molding (rotolining). *If you are considering ETFE coating, please feel free to contact us. For those considering various linings, please also check the "Basic Knowledge of Lining" PDF.