ダイコー Product Lineup

"Rubber molded products" enable simple vibration isolation for suspended equipment by combining rubber bushes and rubber washers. We offer a lineup of rubber molded products, including rubber bushes with bonded washers, as well as dimensionally stable "EPDM molded gaskets" and "ribbed gaskets." These products can be used for suspended support of air conditioning equipment, packaged air conditioners, fan coil units, ventilation systems, pumps, blowers, pipes, ducts, and other devices. [Features] - Enables simple vibration isolation for suspended equipment - Rubber bushes come with bonded washers *For more details, please refer to the PDF materials or feel free to contact us.

We handle natural rubber "rubber washers" and rubber material EPDM, with washer material SS400 "rubber bushes." By combining these, simple vibration isolation for suspended equipment is possible. The rubber bushes have washers bonded to them. We also offer packing material for flexible unions, "EPDM molded packing," and "rib packing EPDM molded packing" with O-ring protrusions on the surface. 【Product Lineup】 ■ Rubber Washers ■ Rubber Bushes ■ EPDM Molded Packing ■ Rib Packing EPDM Molded Packing *For more details, please download the PDF or feel free to contact us.

We would like to introduce the "rubber and sponge packing" that we handle. Our lineup includes "gaskets" made from various rubber sheets punched to suit different applications, "rubber sponge" which has moderate cushioning properties and can also be used as cushioning material, "O-rings" used to prevent the leakage of liquids and gases, and "vibration pads" that prevent vibration transmission, absorb light noise, and mitigate shocks. Please feel free to contact us when you need our services. 【Basic Handling Materials for Rubber Sheets (Example)】 ■ NR Natural Rubber ■ CR Neoprene Rubber ■ EPDM Ethylene Propylene Rubber ■ NBR Nitrile Rubber ■ Si Silicone Rubber ■ IIR Butyl Rubber *For more details, please download the PDF or feel free to contact us.

"I want to process rubber with a thickness of 100mm." "Since it's a prototype, I want to make it without a mold." "I want you to cut complex shapes with high precision." Daiko's water jet processing solves these challenges of thick and precision rubber processing. We accommodate a variety of materials, from natural rubber to fluorine rubber, and faithfully reproduce various shapes from just one of your drawings. *You can view the detailed content of the column through the related links. For more information, please download the PDF or feel free to contact us.

We would like to introduce our general piping joint sheet 'TOMBO No.1995'. This is a brown non-asbestos joint sheet that contains no asbestos, made by adding inorganic fillers to inorganic fibers and aramid fibers, with oil-resistant synthetic rubber as a binder. The sealing thickness is 1.5mm, and the shape used is a ring type (FR). In cases where maintenance is difficult, vortexes and other methods may be used. 【Usage Range】 ■ Water-based fluid pressure resistance: 2MPa / Maximum operating temperature 183℃ ■ Oil-based fluid pressure resistance: 2MPa / Maximum operating temperature 183℃ ■ Gas-based fluid pressure resistance: 1MPa / Maximum operating temperature 183℃ *For more details, please download the PDF or feel free to contact us.

"Vulcan No. 6500" is a sheet-like gasket material made by mixing a special rubber-based binder with organic and inorganic fibers and a small amount of filler, followed by rolling and vulcanization. It does not contain asbestos fibers, making it suitable as a non-asbestos alternative to asbestos joint sheets. Please feel free to contact us when you need assistance. 【Usage Range】 ■ Water-based fluid pressure resistance: 2MPa / Maximum operating temperature 160℃ ■ Oil-based fluid pressure resistance: 2MPa / Maximum operating temperature 160℃ ■ Gas-based fluid pressure resistance: 1MPa / Maximum operating temperature 160℃ *For more details, please download the PDF or feel free to contact us.

"TOMBO No.1120" is a non-asbestos joint sheet that can cover the practical application areas of asbestos joint sheets. It is a black sheet gasket that contains no asbestos, reinforced with aramid fibers primarily made of expanded graphite. It uses oil-resistant rubber as a binder. Please feel free to contact us when you need it. 【Features】 ■ Usable for saturated steam at 2MPa ■ Excellent heat resistance, steam resistance, and corrosion resistance ■ Resistant to scratches and highly flexible *For more details, please download the PDF or feel free to contact us.

We would like to introduce our steam piping joint sheet 'TOMBO No.1155'. Thanks to our unique formulation technology, we have successfully minimized the creep at high temperatures, which is a drawback of PTFE, allowing for excellent sealing performance even under high temperatures. Since PTFE is the main material, degradation at high temperatures is minimal, and it can be re-tightened as needed, ensuring safe and reliable long-term use. 【Features】 ■ High compressive strength ■ Difficult to break when installed on flanges ■ Can be installed safely *For more details, please download the PDF or feel free to contact us.

"TOMBO No.1133" is a white high-temperature resistant sheet gasket made primarily from PTFE and alumina. Since it uses alumina, which has excellent chemical resistance, there is no need to differentiate gaskets based on the type of fluid, such as acids or alkalis. Additionally, it can withstand high temperatures and high pressures, making it suitable for use in areas where electrical insulation is required. 【Standard Sizes】 ■Thickness: t1.5, t2.0, t3.0 ■Size (mm): 1270×1270 (standard) *For more details, please download the PDF or feel free to contact us.

The "Bulker No. GF300" contains no rubber at all, making it a joint sheet for steam piping that does not undergo thermal degradation. It can also be used at high temperatures. By utilizing a flexible resin binder, we have improved brittleness and susceptibility to damage compared to expanded graphite sheet gaskets. Please feel free to contact us when you need assistance. 【Features】 ■ No hardening degradation due to heat or aging ■ Since hardening does not occur, re-tightening is possible ■ Applicable to a wide range of fluids *For more details, please download the PDF or feel free to contact us.

We would like to introduce our "Silicone Rubber Manhole Packing." It is designed for pressure vessels and is made of a flexible material, allowing for smooth installation. Please feel free to contact us when you need assistance. 【Specifications】 ■Dimensions: t10 φ360×φ330 *For more details, please download the PDF or feel free to contact us.

Based on the customer's drawing, we produced a large curtain measuring 1250mm x 5600mm from a 6mm thick natural rubber sheet. Using our water jet cutting machine, we precisely cut the upper mounting holes (19 holes of φ15mm) and the curtain-like slits as a single unit. *For detailed information about the column, please refer to the related link. For more details, you can download the PDF or feel free to contact us.

Based on the customer's drawing, we manufactured a large-diameter gasket with an outer diameter of φ548mm and an inner diameter of φ410mm from a 5mm thick NBR rubber sheet. First, we precisely cut the gasket body (with 16 φ27mm bolt holes on a P.C.D. of 510mm) and the ring-shaped parts using a water jet cutting machine. After that, we bonded the rings to both sides of the body, finishing it as a stepped seal gasket. *For more detailed information, please refer to the related links. For further details, you can download the PDF or feel free to contact us.

This is an example of producing a large and complex U-shaped gasket measuring 545mm x 709mm from a non-asbestos joint sheet "Valqua No. 6500" with a thickness of 3mm, based on the customer's drawing. The processing involved drilling 17 holes with a diameter of 21mm. Using our water jet cutting machine, we achieved high precision cutting directly from CAD data. Valqua No. 6500 is a non-asbestos general-purpose joint sheet made by combining organic and inorganic fibers with NBR and other materials. It demonstrates good sealing properties against general utility fluids and has a long track record in a wide range of applications, including petroleum refining, chemical plants, ships, and general piping. [Processing Features] - Proposal for cost reduction - Low cost and short delivery time without the need for a die - Direct processing from drawings - Easy repeat orders with data storage *For more details, please download the PDF or feel free to contact us.

The selection of rubber materials is an extremely important process that determines the performance, lifespan, and safety of a product. However, with a wide variety of options available, from natural rubber to fluorine rubber, it is not easy to judge "which rubber is the most suitable." This article serves as a comprehensive guide that consolidates information about seven major types of industrial rubber that have been individually explained so far. By deeply exploring the unique "personalities" of each material, focusing on their core characteristics and operating temperatures, we hope to assist you in making more informed material selections. We will also provide insights from the perspective of the specialized trading company Daiko, covering everything from optimal material selection to precision processing. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

Outdoor use, contact with oil, repetitive motion, and safety. Industrial rubber components often require these seemingly contradictory performances simultaneously. To meet such complex demands, neoprene rubber (chemical name: chloroprene rubber, CR) was developed as an "engineering solution." In this article, we will redefine why neoprene is positioned as a "reliable standard material" for many engineers, based on its multifaceted performance data. Furthermore, we will propose specific applications and selection and processing solutions to maximize its performance in collaboration with the specialized trading company Daiko. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.

For the stable operation of industrial machinery, lubricants and hydraulic oils are essential. However, these oils can also cause many rubber materials to swell and deteriorate. To address this fundamental issue, NBR (nitrile rubber) was developed. NBR is a synthetic rubber designed with the clear purpose of "performing well in oil environments," and it should be called a specialist. In this article, we will deeply analyze why NBR has become synonymous with oil resistance, exploring the essence of its performance through physical property data. Additionally, we will clarify its "strengths" and "weaknesses" as a specialist, and propose suitable material selection and processing solutions in collaboration with the specialized trading company Daiko. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

The automobiles, buildings, and social infrastructure we see are constantly exposed to harsh environments such as sunlight, ozone, and rainwater. To ensure these facilities function over a long period, a "protective material" that shields the interior from environmental factors is essential. The key role in this is played by EPDM (ethylene propylene diene monomer rubber). In this article, we will redefine why EPDM is indispensable as the "invisible protective material" of modern society, based on its core performance characteristics derived from physical property data. Furthermore, we will propose selection and processing solutions to enable this excellent protective material to function as actual components, in collaboration with the specialized trading company Daiko. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.

In product development and technological innovation, "temperature" often stands as an insurmountable barrier. However, there exists a special material that can break through that barrier and enable technologies in areas that were previously deemed impossible. That material is silicone rubber (Si). In this article, we will redefine the essential properties of silicone rubber, demonstrating how it is not merely a "heat-resistant and cold-resistant material," but rather a "solution" that can expand technical limits. Furthermore, we will explain the selection and processing of this special material to elevate it into functional components from the perspective of the specialized trading company Daiko. *For more detailed content of the column, please refer to the related links. For further information, feel free to download the PDF or contact us.*

Modern advanced technologies must overcome extremely harsh environments, such as high temperatures exceeding 200°C and highly corrosive chemicals. In these extreme conditions, while other materials lose their performance, high-performance elastomers, specifically fluorine rubber (FKM), continue to exhibit stable performance over the long term. Its overwhelming heat resistance and chemical resistance place it among the highest class of rubber materials, establishing it as one of the reliable solutions in modern industry. This article will elucidate the ultimate performance of fluorine rubber through physical property data and propose selection and processing solutions to maximize its capabilities in collaboration with the specialized trading company Daiko. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

High loads, strong impacts, and intense wear. Under such harsh conditions, rigid plastics can crack, and common rubber can tear. To solve this engineering challenge, a special material that combines the advantages of the rigidity of hard materials and the elasticity of rubber has been developed: urethane rubber (U). In this article, we will redefine why urethane rubber can be a new solution in high-load environments by examining its remarkable physical properties through material data. Furthermore, we will explain the operational rules for maximizing the use of this high-performance material, as well as the processing and selection solutions provided by the specialized trading company Daiko. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

Among the various rubber materials, natural rubber (NR) is considered the origin and reference point. Even in today's world where various high-performance synthetic rubbers are developed, the exceptional mechanical properties of natural rubber continue to hold irreplaceable value in many fields. In this article, based on the provided physical property data, we will delve into why natural rubber remains indispensable in the industrial sector, exploring the core secret of its "strength" and the "weaknesses" that one should understand to maximize that strength. We will deliver solutions from the specialized trading company Daiko, from suitable material selection to precision processing. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

This is an example of producing a large-diameter flange gasket with an outer diameter of φ695mm and an inner diameter of φ595mm from a 3mm thick silicone rubber sheet based on the customer's drawing. The processing involved drilling 12 bolt holes of φ15mm on a P.C.D. of 655mm. Using our water jet cutting machine, we achieved high-precision cutting according to the data. Since no die was required, we were able to respond quickly to a request for a single prototype. Water jet cutting is suitable for processing elastic materials like rubber because it cuts with a high-pressure water stream. 【Processing Features】 ■ No die required, low cost, and short delivery time ■ Direct processing from drawings ■ High-quality cutting with no thermal impact ■ Easy repeat orders with data storage *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case where we manufactured a cylindrical cover with an outer diameter of φ216mm and a height of 48mm from a 3mm thick EPDM rubber sheet based on the customer's drawing. First, we precisely cut the sheet to the specified dimensions using a water jet cutting machine, and then finished it into a cylindrical shape through adhesive processing. By combining cutting and adhesion, we can flexibly accommodate product shapes that are difficult to achieve through integral molding. We create CAD data based on the drawings provided by the customer and process it directly, eliminating the need for molds. Please feel free to contact us for more information. 【Case Overview】 ■ Material: 3mm thick EPDM rubber sheet ■ Product: Cylindrical cover with an outer diameter of φ216mm and a height of 48mm ■ Work Details ・ Precisely cut the sheet to the specified dimensions using a water jet cutting machine ・ Finished into a cylindrical shape through adhesive processing *For more details, please download the PDF or feel free to contact us.

We would like to introduce a processing case where a large product measuring 310mm × 1466mm was created from a special material made by bonding a PTFE sheet to an EPDM rubber block with a thickness of 55mm. This product is a high-performance composite that combines the elasticity and weather resistance of EPDM rubber with the chemical resistance and slip properties of PTFE. The part in contact with liquids is made of PTFE, which is strong against chemicals, while the main body is made of EPDM, providing a solid elastic sealing function. Using our water jet cutting machine, we achieved high-precision cutting of bonded materials with different hardness levels without delaminating the adhesive surfaces. [Case Overview] ■ Processing Details: Drilling a hole with a diameter of 194mm and chamfering the corners with C15 ■ Material: Laminated product of EPDM (55t) + PTFE (1t) *For more details, please download the PDF or feel free to contact us.

In selecting waterproof sealants, cushioning materials, and packing materials, there are surprisingly few materials that meet the three elements of "water-stopping ability," "flame resistance," and "weather resistance" at a high level. The reality is that common sponges often have trade-offs, such as "stops water but is flammable" or "flame-resistant but has weak weather resistance." In response to these challenges, the chloroprene rubber (CR) sponge "Gum Sponge C-4305," manufactured by Inoac Corporation, has been chosen as a standard in the industry for many years. In this article, based on the manufacturer's official technical documentation and product characteristics, we will thoroughly explain why C-4305 has gained such trust from many engineers and designers who say, "You can rely on C-4305 for now." We will delve into the secrets of its core performance, including its "closed-cell structure" and "flame-retardant CR formulation," specific applications, and the "processing technology" that allows this material to be shaped flexibly to meet on-site needs. *For detailed content of the column, you can view it through the related links. For more information, please download the PDF or feel free to contact us.*

In manufacturing environments where "hygiene management" is the top priority, such as in food, beverages, pharmaceuticals, and cosmetics, the selection of rubber components (gaskets, seals) used is extremely important. This is because it is not only about preventing leaks but also about ensuring safety for the human body (compliance with regulations) and significantly reducing the risk of foreign material contamination. A suitable solution to meet such stringent requirements is the "EP-5165-W" developed by Iruma River Rubber Co., Ltd. This is a special grade of white (white) EPDM (ethylene propylene rubber) that is compliant with food hygiene laws and excels in weather resistance and chemical resistance. In this article, we will thoroughly explain why EP-5165-W continues to be chosen in hygiene management settings from the perspectives of "legal compliance," "color advantages," and "basic performance," and we will introduce our solutions at Daiko Co., Ltd., which process and supply this safe material tailored to the shape of our customers' equipment, starting from just one piece. *For detailed content of the column, please refer to the related link. For more information, please download the PDF or feel free to contact us.

In the manufacturing environment of products that enter the human mouth, such as food, beverages, pharmaceuticals, and cosmetics, the safety of "rubber packings" and "gaskets" used in equipment is as important, if not more so, than the safety of the products themselves. If harmful substances were to leach from the rubber and contaminate the products, the trust in the company would collapse instantly. Not an ambiguous "food grade," but truly safe silicone rubber based on "solid evidence" from a public testing organization. That is the "Silicone Rubber Sheet SN-50" from Osaka Rubber Co., Ltd. In this article, we will thoroughly explain why SN-50 has gained absolute trust in the food and medical fields, based on the test report (No. 452-21-A-0055) issued by the Chemical Substance Evaluation and Research Institute (CERI), detailing its legal basis and test results. *For detailed content of the column, please refer to the related links. For more information, please download the PDF or feel free to contact us.

In the manufacturing fields of food, pharmaceuticals, and cosmetics, achieving a balance between "safety (compliance with the Food Sanitation Act)" and "durability (heat and chemical resistance)" is an eternal challenge. While silicone rubber and EPDM are safe and easy to use, they may not withstand high-temperature oils, certain chemicals, or high-pressure steam. This is where "Food Sanitation Act-compliant fluorine rubber IF-900," proudly offered by Iruma River Rubber Co., Ltd., comes into play. IF-900 is a high-grade product that maintains the inherent heat and oil resistance of fluorine rubber while complying with the Food Sanitation Act (Ministry of Health and Welfare Notification No. 370). In this article, we will provide a detailed explanation of the physical properties and resistance data of IF-900 based on the manufacturer's official catalog. We will also introduce our processing solutions at Daiko Co., Ltd. to procure this expensive material in the necessary shapes and quantities without waste. *For more detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us directly.*

The "sheet gasket," which is the most familiar sealing material on site, is widely used due to its convenience of being processed with scissors or cutters, such as joint sheets and fluororesin sheets. However, when it comes to its "thickness," are you not deciding it based on a vague feeling? In fact, the belief that "thicker is stronger and safer" for sheet gaskets is a significant misconception. On the contrary, it is not uncommon for overly thick selections of sheet gaskets to cause critical leakage problems precisely because they are sheet gaskets. In this article, we will thoroughly explain why "thin" is recommended for sheet gaskets, as well as the situations where "thick" is necessary, and the criteria for selection. *For detailed content of the column, please refer to the related links. For more information, feel free to download the PDF or contact us.*

This is a case study of manufacturing block-shaped gaskets measuring 60mm × 95mm from 20mm thick CR rubber (chloroprene rubber). CR rubber is a rubber material that possesses a balanced combination of high weather resistance, heat resistance, oil resistance, and chemical resistance. Compared to other general-purpose rubbers, it has a low flammability characteristic (flame retardant). The processing details include counterboring to sink the heads of bolts and C10 chamfering around the entire product. Using our plotter processing machine (with router function), we minimized the distortion typical of thick rubber and achieved a sharp finish. [Case Overview] ■ Material: CR Rubber 20t ■ Size: 60mm × 95Lmm ■ Processing Details: Counterboring, C10 chamfering around the entire perimeter *For more details, please download the PDF or feel free to contact us.

In the fields of mechanical design and maintenance, the selection of "dimensional standards" for O-rings is unavoidable. We will systematically explain the meanings and applications of various symbols, including JIS standards (P, G, V), AS568, and ISO standards. If you have a physical item but don't know the standard, or if the standard is not listed on the drawing, please leave it to us at Daiko for your selection requests. *You can view the detailed content of the column through the related links. For more information, please download the PDF or feel free to contact us.

Oil leaked from the gaps in the machine, causing the line to stop." "The adjustment screw of the precision equipment became loose, resulting in unstable quality." When we delve into the causes of these serious troubles, we often find that they can be traced back to a single faulty "O-ring." O-rings are extremely important mechanical components that govern the "sealing (leak prevention)" and "operability (friction resistance)" of various machines, ranging from the aerospace industry to semiconductor manufacturing equipment, and even everyday gas appliances. Despite their simple circular shape, O-rings are designed based on advanced material chemistry and physical laws. Choosing the wrong material can lead to a loss of function in an instant, potentially putting the entire expensive equipment at risk. This article will explain the true importance of the O-ring as a component and the essential principles of "material selection" to protect machinery. *For more details on the column, please refer to the related links. For further information, feel free to download the PDF or contact us directly.

When it comes to gaskets with strong heat and chemical resistance, fluororubber (FKM) is the common knowledge in many fields. However, even fluororubber has environments that can be a 'pitfall' where it can 'degrade in a short period of time.' These are the lines of 'steam (water vapor)' and 'strong alkali.' In this article, we will explain the special grade 'IF-900-AF (Aflas/FEPM)' produced by Iruma River Rubber, which overcomes the weaknesses of conventional fluororubber and achieves long life in harsh steam and chemical lines. *For detailed content of the column, please refer to the related link. For more information, feel free to download the PDF or contact us.