Materials Currently Used by the Company

The materials used by our company are selected based on requirements such as durability, stability, recyclability, and environmental impact.
They are primarily drawn from material groups that have long been used in automotive tires, while also incorporating materials that have been newly put into practical use, within the range where consistency in implementation can be maintained.

Material Categories

  • Rubber materials (natural rubber and synthetic rubber)
  • Reinforcing and filler materials
  • Vulcanization and crosslinking materials
  • Anti aging and durability adjustment materials
  • Processing and dispersion adjustment materials
  • Adhesion and interfacial adjustment materials
  • Structural components (cords, fibers, wires, etc.)
  • Other minor additive materials

Information regarding materials can also be found here.

About LCA (Life Cycle Assessment)

Environmental performance in this business is evaluated using the principles of Life Cycle Assessment (LCA). Greenhouse gas emissions (expressed as CO₂ equivalents) are calculated in accordance with the “LCCO₂ Calculation Guidelines for Tires” published by the Japan Automobile Tire Manufacturers Association.

Scope of Evaluation

The following life cycle stages are included:

  • Raw material procurement (production and transportation)
  • Production
  • Distribution
  • Use phase (including fuel economy impact during driving)
  • Disposal and recycling (including transportation, heat recovery, etc.)

Calculation methods, emission factors, and assumptions are based on the referenced guidelines and official data sources

Functional Unit

The functional unit for the evaluation is one passenger car tire. For comparative assessments, the same size, identical usage conditions, and equivalent tire life are assumed. When appropriate, results may be converted to emissions per unit of distance traveled.

Purpose of the LCA

This LCA is intended to quantitatively understand product environmental performance and inform material selection and design decisions. It is not intended to guarantee compliance with specific environmental labeling or regulatory requirements. Results may vary depending on assumptions and scope. Detailed methods and results are described in separate technical documents.

Use of Our Products

Our products are designed as passenger car tires.

Please use them within the range that complies with safety regulations, including tire size, load index, and speed rating appropriate for the vehicle.

When installed on vehicles that meet these conditions, normal driving is possible.

Primary Use Scenarios

  • Daily driving (commuting, shopping, etc.)
  • Urban conditions
  • Short- to medium-distance driving

Safety and Standards

Our products undergo test items based on European safety standards (UNECE regulations), including high-speed endurance, long-duration endurance, and strength.

During manufacturing, inspections such as dimensional accuracy and visual appearance are conducted.

Test Items

  • High-speed endurance test: Continuous running at specified speed
  • Long-duration endurance test: Long-term running under constant load and speed
  • Bead strength test: Resistance to separation from the wheel
  • Dimensional and visual inspection: Size accuracy and appearance check

Reference Standards and Documents

The following standards and documents are referenced in the evaluation:

  • Road Vehicle Safety Regulations
  • UNECE Regulations
  • JIS K Standards (Rubber and Rubber Products)
  • ISO 14040 (Principles and Framework for LCA)
  • ISO 14044 (Requirements and Guidelines for LCA)
  • ISO 22628 (Automotive Recyclability and Recoverability)

Company Overview

Company Name
LIPPER K.K.

Representative
Mikihisa Suzuki

Founded
September 4, 2020

Business Description
Research and development, evaluation, and prototyping of rubber materials and tire material compounds using naturally derived materials and recycled resources.

Head Office Location
Fujioka 12, Fuji City, Shizuoka Prefecture 416-0906, Japan

Laboratory Location
5599 Miyamoto, Iitaka-cho, Matsusaka City, Mie Prefecture 515-1614, Japan

Member Organizations

  • Nanostructured Polymer Research Association

  • The Rubber Association of Japan

  • Fuji City CNF Platform

  • Fujinokuni Cellulose Circular Economy Forum

Cooperative Testing Institutions

  • Shizuoka Prefectural Institute of Industrial Technology

  • Fuji Industrial Technology Support Center

  • Tokyo Metropolitan Industrial Technology Research Institute

  • Kanagawa Prefectural Institute of Industrial Science and Technology (KISTEC)

Awards and Recognitions

  • Climate Tech Award Finalist (Climate Tech Venture, France, 2024)
  • Global Ideas Pitch People’s Choice Award (Clean Tech Open, United States, 2024)
  • Startup Battlefield 200 (TechCrunch, United States, 2024)
  • And many others (see details)