吉田ＳＫＴ List of Products and Services

■ 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.

"Non-stick" refers to a property that makes it easy to release from strongly adhesive materials, meaning it either does not adhere or adheres with difficulty. Utilizing non-stick properties, we introduce surface treatments (coatings) that are effective for release applications, applications where adhesion needs to be minimized, and for simplifying cleaning. [Surface treatments chosen for non-stick and release purposes (partial list)] ■ Non-stick, lubricity, heat and cold resistance, chemical resistance, water and oil repellency, electrical properties 'Teflon (TM) fluoropolymer coating' ■ Release properties, high hardness, dimensional stability, lubricity, wear resistance 'Bicoat (R)' ■ Prevention of adhesion of highly adhesive materials 'Adhesive release coating series' 'MRS coating' (silicone-based coating) ■ Release of molten resin at high temperatures 'FSR coating' *For more details, please click to download the PDF or feel free to contact us.

When applying non-stick coatings to molds and jigs, there are applications that cannot be used due to wear or film peeling. For example, molds subjected to strong pressure and "heat sealers" in packaging machines that come into contact with metal are among them. 'Bicoat' is a coating system that achieves the ideal functions of non-stick and wear resistance by combining inorganic and organic surface treatment technologies. ◆ It offers reliable non-stick and release properties, as well as high hardness and excellent dimensional accuracy. ◆ It is also suitable for coating areas that require micron-level dimensional precision. 【Features】 ■ Incredible durability ■ High hardness and scratch resistance ■ Excellent wear resistance ■ Superior non-stick and release properties ■ Safe for use in molds requiring micron-level dimensional precision *For more details, please refer to the PDF document or feel free to contact us.

To prevent adhesion of sticky substances, fluoropolymer coatings (Teflon™ coatings) and silicone coatings are commonly used, but the following challenges may arise: [Challenge 1] Even with surface treatments claiming to prevent sticking, there was not much change. [Challenge 2] It started sticking unexpectedly quickly during use. [Challenge 3] Silicone coating transfers and causes defects in the bonding process (fluoropolymer did not provide sufficient effectiveness, leading to the choice of silicone). Recently, there has been an increase in customers needing solutions for more adhesive materials, such as wanting to release molten resins that do not fully solidify to shorten processing time. "Yoshida SKT has coatings that can improve such situations." With general fluoropolymer coatings, sticky substances can adhere due to various factors. In response, treatments that create a rough surface to reduce the contact area with sticky substances are known. Our company has a unique technology to create convex surfaces using fluoropolymer and is now offering a kit to experience its effects for free! ▼ You can apply from the official Yoshida SKT website below.

■Concern The customer's adhesive manufacturer was producing various products by stirring and mixing adhesives in stainless steel beakers. During this process, the adhesive would stick to the inner walls of the beaker, preventing proper mixing, so a good non-stick coating was needed. ■Background The customer was already using a fluororesin coating. However, the stirring of the adhesive was conducted at high temperatures above 200°C, and issues arose where the coating would peel off due to contact between the beaker and the stirring blades, leading to contamination of the product with foreign substances. Therefore, they were looking for a coating that offered higher non-stick properties and was less likely to peel off due to scratches. ■Adopted Coating FSR (Fluoro Super Release) HR-3110R ■Adoption Process and Effects Initially, tests were conducted with CHC coat, which has high film hardness even at high temperatures, but some adhesion and film peeling occurred. Therefore, tests were conducted with FSR, which excels in non-stick properties in high-temperature environments. After testing with samples, the beaker was treated with "FSR HR-3110R." As a result, it exhibited non-stick properties that were incomparable to the fluororesin coating, and after about a month of use, there was almost no scratching or peeling of the coating, leading to its adoption.

We have prepared a series that exhibits excellent non-stick properties, particularly against sticky substances, molten resins, adhesives, and adhesive tapes. ■ Series Composition - Super TP/TP Series (composed entirely of fluororesin) - Super CTT Series (composed of surface treatment + silicone-based materials) - Super Alloy Coating (composed of fluorine type and silicone type) ■ Super TP/TP Series (composed entirely of fluororesin) This series can be used in silicone-free environments. Additionally, since it is made entirely of fluororesin, there is no concern about transfer or contamination from silicone oils. Improved slip properties can also be expected due to reduced contact area. ■ Super CTT Series (convex surface + silicone rubber-based) Due to the use of silicone, this series exhibits excellent non-stick properties and low tackiness. Consideration for transfer to the counterpart material is necessary during use. ■ Super Alloy Coating A convex release coating that balances flexibility and high hardness. Surface treatment of HV600 can also be processed onto resins and sponge rubber. *For more details, please download the PDF or feel free to contact us.

The "Nano Process (R) TLS-200" has almost no thickness due to the coating, so there is little need to consider the thickness of the coating, allowing for effects such as non-stick, water-repellent, and oil-repellent properties. Even with sharp substrates like blades, processing can be done while maintaining their shape, enabling surface modification of components in a wide range of industries, including production equipment transport lines and packaging processes. *For more details, please refer to the PDF materials or feel free to contact us. ▼ Here is the official Yoshida SKT website for "Nano Process (R)" ▼

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.

We have prepared a series that exhibits excellent non-stick properties, particularly against adhesives, molten resins, and adhesive tapes. ■ Series Composition - Super TP/TP Series (all fluoropolymer) - Super CTT Series (surface treatment + siloxane) - Super Alloy Coating ■ Super TP/TP Series (all fluoropolymer) - Can be used in silicone-free environments. - There is no siloxane contamination due to the use of all fluoropolymers. ■ Super CTT Series (convex surface + silicone rubber-based) - Exhibits excellent non-stick properties due to the use of silicone. - Consideration is needed for transfer to the counterpart material. ■ Super Alloy Coating - A convex release coating that balances flexibility and high hardness. - Surface treatment of HV600 can also be processed onto resins and sponge rubber. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case study that addresses the challenges faced by customers struggling with resin adhesion to hot melt plates. ■Problem In the process of bonding resin parts such as ASA, ABS, and PC for automotive component manufacturing through hot melting, the target resin is melted at approximately 180-210°C using a hot plate fixture (heat plate) for hot melting, and then bonded with another part. You were looking for a coating to prevent the phenomenon of the hot plate sticking to the resin or the melted resin stretching like threads during the hot melting process. ■Adopted Coating - FSR Coating ■Effects of Adoption Compared to conventional PFA coatings, an improvement in the durability of the release effect when used at temperatures above 200°C and an increase in lifespan were observed. ■Case Summary - Purpose of Surface Treatment: Quality and operational stability, speed-up, reduction of work loss - Required Functions: Non-stick and release properties, heat and cold resistance, wear resistance - Adopted Treatment: FSR Coating (Fluoro Super Release) *For more details on the coating, please refer to the external link or feel free to contact us.

Yoshida SKT offers "coating" and "functional surface treatment" that address concerns such as highly adhesive materials sticking to equipment and components, hindering production or reducing production efficiency. By providing surfaces with the function of being "less sticky," we aim to resolve these issues. 【Improve CFRP production processes with coating from Yoshida SKT】 ■Challenges - Cleaning tools during CFRP autoclave molding is burdensome. ■Solution - Features of optimal coating for cutting blades. ■Features of selectable coatings - Excellent release properties for epoxy resin. - Long-lasting coating effects. - Silicone-free treatment options available. ■Challenges - Release treatment during CFRP molding causes waste and unevenness. ■Solution - Features of high-release surface treatment. ■Features of selectable coatings - Low-temperature treatment minimizes damage to CFRP (mold). - Particularly strong grades with non-stick (release) properties. - Long-lasting coating effects. - Can also provide tackiness (properties that make surfaces less slippery). *For more details, please download the PDF or contact us.

"Non-stick" refers to the property of being easy to release from strongly adhesive materials, meaning it either does not adhere or adheres with difficulty. For example, fluoropolymer resins 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, known as "critical surface tension (γc)," is extremely low for fluoropolymer resins, making them resistant to liquid adhesion and difficult to wet. Coatings that leverage such functions are effective for release applications, applications where adhesion needs to be minimized, and for simplifying cleaning. 【Selected Coatings (Partial)】 ■ Release properties, high hardness, dimensional stability (durable parts, molds) - Bi-Coat ■ Resin release at high temperatures - FSR Coating ■ Prevention of adhesion of high-viscosity materials - Adhesive Release Coating - CTT Fabric Sheet - MRS Coating (Silicone-based coating) *For more details, please refer to the PDF materials or feel free to contact us.

"I want to test the effectiveness of coatings using materials produced in-house in advance!" "I am considering introducing coatings but am struggling with the selection method." Yoshida SKT offers unique know-how to measure coating performance for your concerns and troubles when choosing a coating. Please feel free to consult us about preparing sample pieces. - Do you have any of these concerns? In processes using product labels or packaging tape, adhesive gets stuck to the chuck claws or placement tables, causing line troubles. I want to adopt a non-adhesive coating, but I don't know which coating is optimal for the adhesive materials we use in-house. - With our coating performance measurement service, you can use the materials you are currently using to check the adhesion with the coating, allowing for a smoother actual machine test. ■ Adhesive Tape Release and Peel Force Measurement By applying adhesive tape to the coated surface and measuring the force required to peel it off, you can confirm how well the coating and adhesive tape release from each other. *For applications and to download materials, please visit the official Yoshida SKT website below.

Adhesive tape often sticks to machines and other materials during the manufacturing process due to its nature. To prevent such issues, it is essential to employ coating technologies that exhibit non-adhesive properties, especially against sticky adhesives. By using appropriate coating technologies, the ease of handling materials on the production line can be significantly improved, contributing to the preservation of product quality. Introduction to Coating Technologies ■ Super TP and TP Series Composed entirely of fluororesin, these can be used in silicone-free environments. The use of fluororesin eliminates concerns about the transfer or contamination of silicone oil, and it is expected to improve non-adhesiveness by reducing contact area. ■ Super CTT Series This silicone-based series features excellent non-adhesiveness and slip resistance. Since it uses silicone, consideration must be given to the transfer to the counterpart material. ■ Super Alloy Coating Consisting of both fluorine and silicone types, it achieves a balance of flexibility and high hardness. Surface treatment of HV600 can also be applied to resins and sponge rubber, achieving high durability. *For more details, please download the PDF or feel free to contact us.

**Basics and Types of Release Coatings** Release coating is a surface treatment technology that involves applying a special coating to the surface of molds and forming machines to prevent molded products from sticking to the molds, allowing for smooth removal. By improving release properties, it enables shorter production cycles and stabilizes product quality. In manufacturing sites troubled by release issues with molds, outsourcing coating to contract processing manufacturers with specialized technology allows for high-quality surface treatment that may be difficult to achieve in-house. **Main Types of Release Coating Technologies** There are various types of release coatings, and the optimal method is chosen according to the application. - **Silicone-based Coatings:** Particularly excellent for molten resins and adhesive release. - **Fluoropolymer (Teflon) Coatings:** Using materials like PTFE, PFA, and FEP, they exhibit high release effectiveness. - **Ceramic Coatings:** Ideal for applications requiring high durability due to their excellent wear resistance. It is important to select these coating technologies based on the substrate and usage environment, and release coating manufacturers provide optimal processing. *For more details, please refer to the PDF document or feel free to contact us.*