宝永ゴム Product Lineup

Many of the causes of failure in machinery and industrial robots are due to fluid leaks from the wear and deterioration of sealing components. "Standard O-rings in the catalog leak immediately." "Packings swell due to the use of special chemicals." Do you have such concerns? Hoei Rubber listens to the usage environment (pressure, temperature, fluid type) and selects the optimal materials such as nitrile, fluorine, and urethane, designing and manufacturing "custom seals" tailored to the shape of the machinery. We provide functional components that not only fill gaps but also adjust sliding resistance (slipperiness) and propose long-lasting solutions to reduce maintenance frequency, maximizing the performance of the machinery.

• Rubber

Rubber and resin components used in medical devices and analytical instruments require a level of "safety" and "precision" that sets them apart from general industrial products. The selection of biocompatible materials intended for contact with the human body and the establishment of a clean manufacturing environment that eliminates contamination to the utmost extent are essential conditions. As a fabless manufacturer, we have built a strong network with partner factories that specialize in medical-grade silicone molding and precision resin processing. We propose optimal methods and management systems to meet specialized needs such as "wanting to secure flow paths in micrometers" and "needing materials that can withstand sterilization processes." We support you as a partner in medical device manufacturing, including ensuring traceability.

• Rubber

In the development of automotive and transportation equipment parts, the most challenging issue is likely "long-term durability under harsh conditions." In environments exposed to high temperatures, oil, and intense vibrations, even a slight mistake in material selection can lead to catastrophic failures. At Hoei Rubber, we utilize "vulcanization bonding technology," which firmly adheres rubber and metal at the molecular level, as well as specialized formulation designs that balance vibration-damping performance and durability, allowing us to meet the stringent specifications of critical safety components. Additionally, by proposing shapes that consider yield rates during mass production from the prototype stage, we achieve cost-competitive parts supply. From engine mount components to interior resin parts, we respond to the requests of Tier 1 and Tier 2 manufacturers with the solid expertise of our original manufacturing factory.

• Rubber

The strength of Hoei Rubber lies in our ability to propose the optimal manufacturing process by working backward from what our customers want to create. Because we have a deep understanding of the properties of rubber and resin, we can suggest material and shape changes that lead to cost reductions and functional improvements while avoiding risks. Our experience in operating molding factories allows us to provide advice from a practical perspective. Even if you are at the stage of "not knowing what to use," we will support you as a strong partner.

• Rubber

Are you struggling with complex order management such as "rubber from Company A, resin from Company B, and assembly in-house"? At Hoei Rubber, we can provide a one-stop solution for everything from molded rubber and resin products to precision cutting of sponge sheets, and even composite products that combine different materials. By merging our extensive network as a fabless manufacturer with our quality control capabilities based on manufacturing experience, we will establish a parts supply system that meets your ideal requirements. Whether it's small quantities of various types or mass production, please feel free to contact us first.

• Rubber

Hoei Rubber is not just a trading company; it is a fabless manufacturer with the DNA of a "former manufacturing site." We offer solutions from the perspective of someone who knows the ins and outs of the manufacturing process to challenges such as "difficulties with integrated molding" and "uncertainty in material selection." In addition to general molded products, we have numerous "quiet success stories" that require unique know-how, such as joining with metals and special die-cutting processes, details of which cannot be publicly disclosed. If you are a development or procurement manager facing technical barriers, please feel free to consult with us.

• Rubber

By insert molding a thin RFID into rubber, waterproofing and durability are improved. It is challenging to insert mold thin items, but it is not a problem for our company.

• IC tag

Are you having trouble with the packing of batteries, especially lithium-ion batteries? Quality audits require appropriate production facilities due to the large quantities involved. We can handle audits without any issues and can accommodate the quantity as well. We look forward to your inquiries.

• Rubber
• Lithium-ion battery

Silicone rubber and silicone sponge extrusions, available in round shapes, various profiles, with tape, endless, and can accommodate various needs.

• LED lighting
• Rubber

"Ho-Ei Rubber" is a fabless manufacturer of rubber and resin components. Utilizing our experience and know-how from operating molding factories for rubber and resin, we provide proposals that meet our customers' needs. We handle not only rubber and resin molded products but also cutting of rubber sheets and sponge sheets, as well as composite products made of rubber, resin, and metal. As this involves our proprietary know-how, we cannot provide detailed information, but we have successfully addressed many projects that were considered difficult to realize. If you are facing issues with rubber or resin, please feel free to contact us.

• Rubber

Rubber is considered to be non-slip, but by using this paint, it is possible to make it slippery. In other words, coating is possible.

• Rubber
• valve
• Other polymer materials

Are there instances where the thickness tolerance is large during the molding of diaphragms or key rubber, making it unable to function properly? At Hoei Rubber, we can accommodate such strict thickness tolerances. If you could provide us with drawings, we would be happy to give you a quote. Please feel free to contact us. *For more details, please refer to the PDF materials or feel free to reach out to us.

• Rubber
• Other Auto Parts
• others

At Hoei Rubber, a fabless manufacturer dealing with resins and other materials, we leverage our network to deliver products at reasonable prices and with short lead times. We offer products that excel in vibration-damping performance, which can be used to reduce water noise when applied to the back of sinks or to prevent speaker rattling. In addition to improved performance with aluminum foil, we also accommodate small lot orders. If you are experiencing issues with sound or vibration, please consult with us. 【Features】 ■ Excellent vibration-damping performance ■ Proven results for soundproofing applications ■ Self-adhesive ■ Performance enhancement possible with aluminum foil (also available without) ■ Custom cutting and small lot orders available *For more details, please refer to the PDF document or feel free to contact us.

• Rubber
• Anti-vibration, earthquake-proof, vibration-isolating devices

Boei Rubber, which sells rubber, plastic, and metal products, leverages its fabless manufacturer's network to deliver products at reasonable prices and in a short lead time. Even for difficult items, we utilize Boei Rubber's technology to produce and deliver them to our customers. *We are currently distributing a "List of Manufacturing Achievements"! (Please check it out from the download section) 【Examples of Molding Achievements】 ■ Rubber Products (Submersible Pump Casings, Drain Hoses, Vibration-Damping Rubber, etc.) ■ Resin Products (LED Lighting Equipment Sockets, Reflectors, etc.) ■ Rubber and Metal Composite Products (Rubber-Bonded Metal Gaskets, etc.) ■ Extrusion Molding Achievements (Electronic Equipment Silicone Rubber Sponge, Solar Power Supply Equipment, etc.) For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Rubber
• Other Auto Parts
• others

We will introduce the molding achievements of Hoei Rubber, which sells rubber, plastic products, and metal products, along with numerous photos. We have achievements in rubber products such as refrigerator ice maker connection packing and rice cooker lid packing, as well as achievements in resin products like LED lighting equipment sockets and rotating light globes, and achievements in rubber and metal composite products. 【Examples of Molding Achievements】 ■ Achievements in Rubber Products ■ Achievements in Resin Products ■ Achievements in Rubber and Metal Composite Products ■ Achievements in Extrusion Molding *For more details, please refer to the PDF materials or feel free to contact us.

• Rubber
• Other Auto Parts
• others

Our company offers "insert molding," where metal is fixed in a mold and surrounded by rubber to create a unified product. During the molding process, the rubber softens when heat is applied and flows within the mold, so it is necessary to secure the metal. This requires support pins, which leave holes in the final product. However, we have successfully performed insert molding without the need for support pins. Of course, we can maintain a consistent position for the inserted metal, allowing us to achieve insert molding even with metal spheres. The absence of holes for supporting the metal significantly expands the range of applications for exterior components. *For more details, please refer to the PDF document or feel free to contact us.*

• Rubber
• Processing Contract

Our company specializes in vulcanized bonding of glass and rubber. While it is possible to achieve a certain level of strength with commercially available adhesives, vulcanized bonding is necessary to obtain a strong adhesive bond. In the case of vulcanized bonding, the bonding occurs during the rubber molding process, which can apply pressure and temperature to the glass, causing it to break. However, through repeated trial and error, we have succeeded in performing vulcanized bonding without breaking the glass. Due to its strong adhesive properties, our method has been adopted by major home appliance manufacturers. If you are considering the challenging task of bonding glass and rubber, please feel free to consult with us. *For more details, please refer to the PDF materials or feel free to contact us.*

• Rubber
• Processing Contract

Are you looking for boxes to hold electronic circuit boards and similar items? Designing from scratch can be time-consuming due to various tests. We offer a variety of boxes. We handle everything from resin boxes to metal boxes. Additionally, if you let us know your desired size, we can assist in selecting the appropriate box for you. Please feel free to contact us. 【Features】 ■ A variety of boxes available ■ Handling both resin and metal boxes ■ Box selection is also possible ■ Drilling services available *For more details, please refer to the PDF document or feel free to contact us.

• Contract manufacturing

When painting rubber, it cannot be done with regular paint. Our company handles everything from rubber molding to painting in a consistent manner. It is also possible to eliminate the tackiness (the unique stickiness of rubber), and we can accommodate everything from synthetic rubber to silicone rubber. By providing a consistent service from molding to painting, we reduce the burden on our customers and ensure their satisfaction with the quality. Of course, we also accept painting jobs only. If you are considering painting rubber, please feel free to consult with us. *For more details, please refer to the PDF document or feel free to contact us.

• Rubber
• Processing Contract

"Polycarbonate transparent molded products" are molded items for appearance purposes, ranging from relatively large items used in rotating lights to small ones. While it may seem simple at first glance, it requires more stringent techniques than standard molded products, as issues such as welds, cloudiness around the gate, and defects resembling record marks can occur during molding. To address such problems, it is necessary to propose shapes that minimize risks and to design molds accordingly. Additionally, technology that can provide specific conditions is also required. [Features] - Molded products for appearance purposes - Increased freedom of shape - Proposals for shapes that reduce risks and mold design are possible *For more details, please refer to the PDF materials or feel free to contact us.

• Surface treatment contract service
• Processing Contract

At Bouei Rubber, we perform "resin vapor deposition," which allows us to achieve a metallic luster by depositing a coating on resin. In addition to adding a sense of luxury, it also offers advantages as a metal alternative, allowing us to create reflective mirrors using resin. By converting to resin, we increase design flexibility and reduce weight, which helps prevent product damage during transport. Furthermore, using resin molding can help reduce costs. 【Features】 ■ Luxury feel from metallic luster ■ Increased design flexibility ■ Damage prevention through weight reduction ■ Cost reduction *For more details, please refer to the PDF document or feel free to contact us.

• Surface treatment contract service
• Processing Contract

For many years, our company has been handling rubber and resin products. We are currently offering a booklet on a common yet challenging issue that often arises during the design of rubber products: "Four Common Challenges and Solutions in Rubber Product Design." If you are struggling with rubber design issues such as complex shapes, cost-effective methods, or material selection, this is a must-read! 【Contents】 ■ Addressing complex shapes ■ Methods for cost-effective production ■ Material selection support ■ Integration of rubber with other materials *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Rubber
• Sealing

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. "I want just a slightly softer part on a hard object." "I want to add a little rubber sealing capability." We receive many inquiries about wanting to integrate rubber with different materials. However, challenges can arise, such as complex shapes, high initial investment costs, or difficult-to-bond materials. 【Problems and Solutions】 ■ Issue: Want to bond rubber with different materials ⇒ After solution: Achieved products that are difficult to bond *For more details, please refer to the catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. Rubber material selection is based on the usage environment and application. "We have been using this material for a long time, but is the selection correct?" "Wouldn't it be better to change the material for this part?" We have received inquiries about wanting to reconsider the material. 【Problems and Solutions】 ■ Issue: Uncertainty about whether the material selection was correct ⇒ After resolution: Provided advice based on material differences and selected the optimal material *For more details, please refer to the catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. Prototype costs, mold costs, material costs, etc. Various expenses are incurred in product realization. However, if considered during the design phase, it may be possible to reduce costs. "We can't repurpose existing products?" "What shapes and materials can the molds produce?" We receive many inquiries before the design phase. [Issues and Solutions] ■ Challenge: We want to know how to reduce costs. ⇒ After resolution: By consulting before the design phase, we successfully achieved cost-effective production. *For more details, please refer to the catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. "I want to consider silicone rubber because I need heat resistance." "I want to use rubber because I need cushioning." However, for products with complex shapes, the cost of molds can become too high, or the moldability may be poor, leading to setbacks during the consideration process. [Problems and Solutions] ■Challenge: Soft materials are desirable, but can complex shapes be achieved with rubber? ⇒After resolution: By innovating materials and processing methods, complex shapes can be realized. *For more details, please refer to the catalog or feel free to contact us.

• Rubber

The "High-Performance Insulation Sheet" is a silicone sponge-based insulation sheet that does not shatter like glass materials, making it gentle on both people and the environment. It has excellent water repellency and maintains insulation performance over the long term compared to conventional glass wool. It also meets the flame retardant standard UL94 V-0 and can withstand a wide temperature range from -40 to 180°C. 【Features】 ■ Excellent heat and cold resistance ■ Cushioned and does not deteriorate under repeated compression fatigue ■ Good weather resistance, suitable for long-term use ■ Can be freely shaped through Thomson processing *For more details, please refer to the materials or feel free to consult us.

• Other polymer materials
• Other consumables

In large enclosures such as power converters and distribution boards, do you have concerns such as "unable to achieve waterproofing," "unable to accommodate small lot sizes," "wanting to reduce initial investment costs," or "concerns about durability"? In response to these issues, our company offers optimal solutions based on our rubber molding and resin molding technologies and the know-how we have cultivated over the years. 【Case Studies】 ■ Successfully achieved waterproofing for enclosures that were difficult to waterproof with other manufacturers' products. ■ Addressed small lot needs with stock items. ■ Proposals for high-durability materials with low compression set are also possible. *For more details, please refer to the materials or feel free to contact us.

• Rubber

Baoyou Rubber is a trading company that deals with rubber, resin, and other materials. Utilizing the unique network of a trading company, we deliver products at reasonable prices and with short lead times. The trim can be easily attached to a steel plate with one touch. Our company can accommodate various shapes, materials, and insertion methods. We also offer endless processing. *For more details, please feel free to contact us.

• Rubber

For many years, our company has been handling rubber and resin, and we are currently offering a booklet on common and difficult-to-solve problems related to rubber, titled "Four Common Problems with Rubber and Their Solutions." This is a must-read for anyone struggling with rubber issues related to cracks, specifications, and hardness/softness! 【Contents】 ■ Addressing cracks in cushion rubber, packing, seals, etc., caused by ultraviolet rays ■ Solutions for O-rings that have no molds and high machining costs ■ Manufacturing rubber that balances high hardness (over 90) and cushioning properties ■ Producing soft rubber that can absorb micro-vibrations (hardness below 10 is also possible) *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Rubber
• Sealing

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. When the hardness of general-purpose rubber is between 40 and 60 (JIS K6253 Shore A), it cannot absorb micro-vibrations at all. One alternative that comes to mind is gel. However, due to high costs, we hear that it often ends up being just a consideration. 【Problems and Solutions】 ■ Issue: General-purpose rubber is too hard to absorb vibrations ⇒ After resolution: We can accommodate low-hardness rubber For more details, please refer to our catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. There are many hard materials besides rubber, such as metals and resins. However, we often hear voices like: "Just being hard is not enough for a product..." "I want to make it with the hardest rubber possible because cushioning is necessary for the product's application..." 【Problems and Solutions】 ■ Issue: If it's just about hardness, metal would be fine... ⇒ After the solution: We can accommodate high-hardness rubber. For more details, please refer to our catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. O-rings are basically standard products. If they are not available as standard products, a mold must be created. While it is not impossible to produce them through machining, it requires a very high cost, especially for larger O-rings. 【Problems and Solutions】 ■ Issue: While it is possible to produce them through machining, cost is a concern. ⇒ After the solution: Large O-rings can be obtained without creating a mold. For more details, please refer to the catalog or feel free to contact us.

• Rubber

We will introduce common issues related to rubber and the solutions implemented by Bōei Rubber Co., Ltd. Rubber, such as cushioning rubber, packing, and seals, is used in various places both outdoors and indoors. However, certain types of rubber can develop cracks due to various influences. When rubber cracks, it may become unusable depending on its application. 【Problems and Solutions】 ■ Issue: Cracks look unsightly and raise functional concerns ⇒ After resolution: Cracks have completely ceased to occur For more details, please refer to the catalog or feel free to contact us.

• Rubber

Rubber gaskets for waterproofing electronic components for vehicles can be used as sealing parts for vehicle-mounted terminal blocks. They are molded from silicone rubber. We can assist with material selection, part line discussions, prototype participation, audits, and more. 【Features】 ■ Proven track record as sealing parts for vehicle-mounted terminals ■ Molded from silicone rubber *Please take a look at our catalog and feel free to contact us.

• Rubber

For fine rubber products, precision molds are required, and accurate calculation of shrinkage rates and management of material input quantities are also necessary. Are you wondering where to produce such small and complex-shaped rubber products? Our company is capable of manufacturing fine rubber molded products weighing less than 1 gram, as well as rubber products with complex shapes. *Please consult us regarding dimensional accuracy and fitting areas when making inquiries. 【Features】 ■ Rubber products weighing less than 1 gram can be manufactured ■ Fine rubber products can be produced *Please feel free to check our catalog and contact us.

• Rubber

The special rubber handled by Bouei Rubber is disliked by cockroaches but has no effect on the human body. It uses natural ingredients and is a very safe product. The effect lasts for about three months. 【Features】 1. High safety (does not use toxic substances) 2. No odor or smoke generated 3. Can be used in various locations (no metal corrosion or discoloration of clothing) 4. Safe to use in homes with babies and pets 5. Available in various shapes and sizes 【Examples of Use Cases】 - Research laboratories - Experimental laboratories - Food factories - Nursing facilities - Daycare centers - Etc. *Please take a look at the catalog and feel free to contact us.

• Rubber

We can manufacture gaskets for steam heating and gaskets for oven trays. >> Leave it to Houei Rubber for all your rubber needs! << ◇ I want to create items in various colors ◇ I want to add text ◇ I want a smooth surface... ◇ I want the text to be backlit ◇ I want to give a sense of luxury with plastic keys ◇ Waterproof switches We can accommodate a variety of needs! Please take a look at our catalog and feel free to contact us.

• Rubber

Large and complex rubber molded products require specialized molding machines or presses. Products weighing over 5 kg or those that require vacuum presses can also be manufactured. 【Features】 ■ Large products over 5 kg ■ Molded products with complex shapes ■ We also offer price cooperation *Please contact us for inquiries and consultations.

• Rubber

Are you considering purchasing products made from fluororubber? Fluororubber is excellent in heat resistance, oil resistance, chemical resistance, and solvent resistance, and is widely used in sealing components, automotive parts, and semiconductor-related components. 【Main Applications of Fluororubber】 ■ O-rings ■ Gaskets ■ Diaphragms ■ Other automotive parts ■ Semiconductor-related components and more At Hoei Rubber, we can produce prototypes of products made from fluororubber. *For more details, please download the catalog or contact us.

• Rubber

Are you considering purchasing products made of silicone rubber? Silicone rubber is excellent in heat resistance, water resistance, and chemical resistance, and is widely used in various applications including sealing components, medical parts, and kitchen-related items. 【Main Uses of Silicone Rubber】 ■ Seals for food containers ■ Buttons for remote controls ■ O-rings ■ Medical tubes ■ Kitchen goods and more At Bouei Rubber, we can create prototypes of products made from silicone rubber. *For more details, please download the catalog or contact us.

• Rubber

Are you considering purchasing products made from NBR (nitrile rubber)? NBR (nitrile rubber) is excellent in oil resistance and abrasion resistance, and is widely used in various sealing components such as O-rings and gaskets, as well as various automotive parts. 【Main applications of NBR】 ■ O-rings ■ Gaskets ■ Packing ■ Oil-resistant hoses ■ Automotive parts, etc. At Hoei Rubber, we can create prototypes of products made from NBR (nitrile rubber). *For more details, please download the catalog or contact us.

• Rubber

Are you considering purchasing products made from EPDM? EPDM is excellent in weather resistance, heat resistance, and solvent resistance, and is widely used in automotive parts, machinery parts, and industrial goods. 【Main Applications of EPDM】 ■ Automotive parts ■ Window frame rubber ■ Hoses ■ Conveyor belts ■ Other industrial rubber products ■ Construction rubber components and more At Hoei Rubber, we can create prototypes of products made from EPDM. *For more details, please download the catalog or contact us.

• Rubber

Rubber products are difficult to manufacture in small lots and with short delivery times, but our company offers them regardless of lot size, with short delivery times and low prices. Our existing customers are very satisfied. 【Features】 ■ Short delivery time support ■ Small lot availability ■ Offered at low prices ■ Quick response *Please contact us for inquiries and consultations.

• Rubber

Are you struggling with high initial investment when manufacturing rubber molded products? Rubber molded products typically require molds, which generally leads to high costs and long lead times. However, our company can offer production with reduced initial investment. 【Features】 ■ Short lead time (as short as 10 days) ■ Low cost ■ Small lot production available ■ Quality assurance *Please contact us first.

• Rubber