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Rubber Product List

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Industrial rubber products

Industrial rubber products

For water-resistant rubber, sealing materials, and other molded or extruded products, please leave it to us.

Our company handles various industrial products made of rubber and resin, including water-tight rubber (water-stopping rubber) used in dams, sluices, and water purification plants. We can select materials and products suitable for your application and also create various rubber products tailored to your needs and specifications from original molds. Please feel free to consult us with your requests. 【Main Products】 ■ Water-tight rubber (P type, L type, Y type, U type, caisson type) ■ Rubber molded products (rubber caps, rubber packing) ■ O-rings ■ Rubber hoses, resin hoses ■ Hydraulic packing ■ Dust seals ■ Conductive rubber and more *For more details, please download the PDF or feel free to contact us.

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What is waterproof rubber (2) <Shape of waterproof rubber>

What is waterproof rubber (2) <Shape of waterproof rubber>

An essential part that cannot be omitted for facilities related to water! We will explain the shape of the water-tight rubber.

Waterproof rubber is mostly custom-made to fit the location of use and the shape of the gate, but there are also common shapes among them. Starting with the basic shape "flat type," there are widely used shapes like "P type," and also "mountain type," which is sometimes referred to as "caisson type." Additionally, there is the "L type," which has a cross-section shaped like the letter L, along with its variations "Y type" and "U type." [Shapes] ■ Flat type ■ P type ■ L type (with variations Y type and U type) ■ Mountain type (caisson type) *For more details, please refer to the related links or feel free to contact us.

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What is waterproof rubber (3) <Rubber materials used>

What is waterproof rubber (3) <Rubber materials used>

Once installed, it is expected to be used for several decades! Introducing the materials used for waterproof rubber.

Waterproof rubber is designed to withstand the water pressure of dams and sluices, as well as prolonged exposure to sunlight and air (ozone), so the materials are selected and formulated to endure such harsh conditions. The main materials used are CR (chloroprene rubber), which has high average values for weather resistance and chemical resistance, and NR (natural rubber), which is derived from the sap of the rubber tree. Additionally, there are composite versions that not only use CR or NR alone but also bond resins to the rubber. To eliminate the inherent slipperiness of rubber, low-friction (slippery) resins can be adhered to the rubber surface. 【Required Physical Properties】 ■ Low water absorption ■ Rich in elasticity ■ Durable ■ Excellent weather resistance *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "Mountain-shaped rubber"

Waterproof rubber "Mountain-shaped rubber"

It is often used for high-pressure water gates.

It is characterized by its ability to be used under high pressure and is often used in high-pressure sluice gates. Variations include the two-peaked type with two contact points and the W-shaped type with peaks on both the front and back. Material: Natural, CR (Chloroprene Rubber) 【Usage Locations】 ■ Dam gates ■ River gates ■ Other locations requiring water stoppage *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "P-type rubber"

Waterproof rubber "P-type rubber"

The deformation amount is large, and it is mainly used on the sides of low-pressure water gates.

It has a wide range of applications and is actually the most commonly used in various parts up to the medium-pressure water gate. It can be used with the "intermediate method" sealing system, and by drilling a hole in the P section, the deformation amount can be easily increased. Material: NR (natural rubber), CR (chloroprene rubber) 【Usage Locations】 ■ Dam gates ■ River gates ■ Other areas requiring water stoppage *For more details, please refer to the related links or feel free to contact us.

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Learn from the basics! What is a waterproof rubber?

Learn from the basics! What is a waterproof rubber?

"What is waterproof rubber?" "In what places is it used?" "What types are there?" These questions are answered! *Materials provided.

According to the Kojien dictionary, "water-tight" refers to "a state in which water does not leak from gaps, etc., in machines and devices." Based on this definition, water-tight rubber refers to rubber products used in places where water does not leak from gaps. This booklet introduces basic knowledge about water-tight rubber, such as "What is water-tight rubber?" and "Where is it used?" It is a book that will deepen your understanding of water-tight rubber. Please take a moment to read it. *For more details, please refer to the related links or feel free to contact us.

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Waterproof Rubber Product Catalog

Waterproof Rubber Product Catalog

Supporting society and contributing to development! Our company has 60 years of experience and know-how in waterproof rubber.

This catalog introduces "waterproof rubber." Japan, where we live, is surrounded by water on all sides and has always been influenced by it. While it is essential for our survival, it can also pose a significant threat. When an earthquake occurs, tsunamis can follow, and heavy rainfall can lead to floods. The structures that protect our lives and daily activities from these threats are things like sluice gates, and the material used in those sluice gates is "waterproof rubber." The content we are introducing is just a part of what we offer. We also handle a wide variety of waterproof rubber products and the production of molds. [Contents (excerpt)] ■ P-type rubber ■ L-type rubber ■ U-type rubber ■ Y-type rubber *For more details, please refer to the PDF document or feel free to contact us.

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Waterproof rubber is a special rubber that supports daily life in unseen ways.

Waterproof rubber is a special rubber that supports daily life in unseen ways.

Introducing the roles that rubber products, which are not commonly heard of in daily life, have played.

Water-tight rubber is a special rubber product that Kyodo Rubber has been handling for over 60 years. Dams and sluices, which play a significant role during disasters, have a device called a gate that adjusts the water flow. The fundamental performance required of that gate is water-tightness, which serves the role of stopping water, and the material used for the water-tight parts is water-tight rubber. In other words, water-tight rubber is a crucial component that fulfills the essential function of water-tightness, which is required as a prerequisite when adjusting water flow for disaster prevention and power generation. 【Differences from general rubber products】 ■ Special materials are needed to satisfy specified conditions (physical properties) ■ Many products are large, and expertise is required to manufacture them to fit the shape of each gate ■ Strict inspections must be passed after production *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "Y-type rubber"

Waterproof rubber "Y-type rubber"

The soft head part makes it excellent for low-pressure sealing.

Waterproofing is done at the head part of Y. Due to the softness of the head part, it is excellent for low-pressure waterproofing. However, there is a drawback that the joint part is prone to tearing, but there are products that prevent tearing by applying a tear-resistant film to the joint part. Material: NR (natural rubber), CR (chloroprene rubber) 【Usage Locations】 ■ Dam gates ■ River gates ■ Other locations where waterproofing is needed *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "Flat rubber"

Waterproof rubber "Flat rubber"

It is a waterproof rubber commonly used at the bottom of sluice gates.

It has a simple structure and can be used at relatively high pressures. It is commonly used at the bottom of sluice gates. Material: NR (natural rubber), CR (chloroprene rubber) Size: Custom sizes can be made using molds as per your requirements. 【Usage Locations】 ■ Dam gates ■ River gates ■ Other areas where water stoppage is needed *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "L-type rubber"

Waterproof rubber "L-type rubber"

The deformation amount is large, and it is mainly used on the sides of low-pressure water gates.

The deformation amount is the largest and is mainly used on the sides of low-pressure sluice gates. As L-shaped deformations, there are also Y-shaped and U-shaped variations that have been modified at two points where the door meets. Material: NR (natural rubber), CR (chloroprene rubber) 【Usage Locations】 ■ Dam gates ■ River gates ■ Other locations where water stoppage is required *For more details, please refer to the related links or feel free to contact us.

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Waterproof rubber "Waterproof expansion joint"

Waterproof rubber "Waterproof expansion joint"

It is used for gates and similar structures to adjust the effects of iron expansion and contraction due to temperature changes.

Water-tight expansion joints. Used in gates and similar applications to adjust for the effects of temperature changes on the expansion and contraction of iron. Material: NR (natural rubber), CR (chloroprene rubber) Size: Can be manufactured to your desired size [Usage Locations] ■ Gates for rivers, seas, etc. *For more details, please refer to the related links or feel free to contact us.

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