Yokohama Rubber CSR Web Site 2015HOME

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  • Item

    Total volume of raw materials used

  • FY 2014 results

    (Consolidated) 791 tons

Responsible departments

Technology and design departments
* Supervised by the 3Rs Committee

Stance and target

Why is "Materials" a critical issue to be addressed?
Explanation of the reason and background

Yokohama Rubber Group sells products using chemicals and natural capital such as natural rubber and water. These raw materials are made from the Earth's natural resources, and they are by no means infinite. Accordingly, we view using minimal raw materials, promoting the sales of recycled products (such as retread tires), and the delivery of products that will please customers and society using recycled raw materials (such as regenerated rubber) to be important issues.

Policies and stance relating to raw materials

The Yokohama Rubber Group will work to develop raw materials that minimize the burden on the environment and to minimize procurement and use volumes in accordance with the Environmental GD100, Yokohama Rubber Environmental Policy, and Yokohama Rubber Group Action Guidelines.

Vision (attainment goal) / target

By reducing the amount of raw materials used, promoting the sales of retread tires, and working to expand use of recycled raw materials, we will establish a raw materials procurement system that can be used in a sustainable manner with a minimal impact on the environment and society throughout the entire life cycle. These activities will contribute to reducing CO2 emissions in Scope 3 Category 11 (product use stage) by FY 2050.

Measures for vision achievement

We will develop and use raw materials with a reduced burden on the environment and society through the following initiatives in order to achieve business continuity.

  1. We will review factors such as structural design and material rigidity to fulfill the required performance while achieving weight reductions.
  2. We will work to promote sales of retread tires.
  3. Furthermore, we will develop tires and belts with a high regenerated mixture ratio and reusable products.

Review of FY 2014 activities

Achieving light weight for used parts is essential for improving automotive fuel efficiency. The Group’s products including new car installation tires that fulfill stringent requirements for fuel efficient tires were adopted by many automotive manufacturers as products equipped with both durability and safety.

Expand the use rate of rubber recycled materials

The percentage of raw materials accounted for by rubber recycled materials (rubber powder, reclaimed rubber, and rubber reclaimed from our rubber trash) was 0.8% for the entire group (1.1% for domestic business locations and 0.4% for overseas business locations).
Yokohama Rubber established blending technologies that control physical degradation with a compounds of fine powder grade, and commenced mass production of tires made from a compound of this regenerated rubber from February 2009. The use of regenerated rubber powder has expanded over the past five years, and the regenerated rubber use volume ratio at Yokohama Rubber has grown by 2.7 times since FY 2008.

Usage ratio of regenerated rubber in all Yokohama Rubber products *1

Usage ratio of regenerated rubber in all Yokohama Rubber products

*1 Ratio of new rubber consumption based on results of acceptance inspections

Currently, we are utilizing regenerated rubber powder in various compounds found mainly in PC, TB, and OR tread liners manufactured at our plants in Japan, the United States, the Philippines, Thailand, Vietnam, China, and India. In terms of technology, we will work to improve blending technologies, expand the applicable compounds that can be blended for regenerated rubber powder, and also actively strive to increase the compound volume through further miniaturizing of powder size.
A regenerated rubber powder manufacturer has calculated that since use of recycled rubber powder was commenced at plants in the US in 2006, the use amount at the Yokohama Rubber Group is equivalent to 1.09 million waste tires. This is equivalent to approximately 61,000 kl if converted into oil and equivalent to resource and energy savings of approximately 19,614.7kWh if converted into power. In addition, if converted into CO2 emissions, this is equivalent to an emissions reduction of approximately 27,000 tons.

Resources Circulation by Using Regenerated Rubber Powder

Resources Circulation by Using Regenerated Rubber Powder

Environmental Impact Reduction Effect from the Use of Regenerated Rubber*2

Environmental Impact Reduction Effect from the Use of Regenerated Rubber

*2 Data provided by Lehigh Technologies

High-rigidity wind sealant

Our automotive glass sealant (wind sealant) has a positive reputation for its high durability, and we have developed high-rigidity wind sealant to improve the rigidity of car bodies. This not only improves safety, but also contributes to lighter car bodies through a decrease in the volume of sealant used.

Issues and future improvement measures

While using raw materials in business activities is unavoidable, our final goal is a state which minimizes the use of the Earth’s resources.
An issue that is faced is correctly assessing whether the use of reusable products and recycled materials is leading to a reduction in the use of the Earth’s resources and the environmental impact, and to deploy these assessment on a global level.