CFR Introduction

Harigai Industry Co., Ltd.

What is CFR？

Proprietary technology has created a new type of rubber sheet with unprecedented materials
CFR（Carbon Fiber Rubber）
Patent acquisition: Patent No. 6531245

CFR is a product that combines rubber and carbon fibers.
Carbon fiber has traditionally been a difficult material to bond, but with our proprietary technology, we have succeeded in creating a strong bond.

The “CFR Sheet” is an innovative reinforced rubber sheet that leverages the high strength and lightweight properties of carbon fiber along with the elasticity and flexibility of rubber, offering features such as light weight, high strength, impact absorption, and flexibility.

This material is already being used in the sports industry and has been tested in disaster prevention products, automotive sectors such as tires, and in the energy field like wind power generation. It is also expected to be utilized as reinforcement material for hydrogen fuel tanks, which are anticipated to become more widespread in the future.

CFR（Carbon Fiber Rubber）

The "CFR" is a completely new material like no other. It combines the elasticity of rubber and the high strength of carbon fiber, making it particularly excellent in shock resistance and energy absorption. It can also be used in combination with CFRP and other materials.

Structure of CFR sheets

In order to join rubber and carbon fiber fabric, molding is performed using a uniquely developed bonding technology.

Comparison with CFRP/TP

	Rubber and carbon fiber “CFR” sheet	CFRP/TP sheet made of reinforced plastic and carbon fiber
light	Specific gravity is 1/5 of iron	Same as CFR
strong	Tensile strength is 10 times stronger than steel	Same as CFR
Shock-resistance	Impact absorption is about four times that of CFRP/TP	Poor shock absorption
Flexibility	Flexibility unique to rubber (good bending properties)	Hard to bend

Lightweight

Comparison of specific gravity with typical materials

Strong

Comparison of tensile strength

Impact resistance

Comparison of falling weight impact energy absorption and displacement

Flexibility

After bending 200,000 times, there was no peeling between the layers, and no cracks in the surface layer, frayed carbon fibers, or other damage was observed.

Physical properties table

＜CFR sheet physical properties table (representative values) *Thickness 1.0 mm＞

Rubber material ＊Our own compound rubber	EPDM (Ethylene Propylene Rubber)
Specific gravity	1.12 to 1.16
Tensile strength (Mpa)	71.4 to 121.3
Elongation (%)	4.9-8.2
Piercing strength (N)	588.6～1083.6
Impact strength (N)	641.7 to 852.3
Impact absorption energy (J)	3.9–5.1
Size	Width 1m (effective width 0.95m) x length 47m x thickness 1.0mm Note) ① Effective width is the bonding area between rubber and carbon fiber ② Thickness tolerance ±0.2mm
Rubber hardness	60±5 Note: Measured using Shore Durometer A.
Rubber Color	black
Carbon Fiber Cloth	PAN series 3K plain weave

If you have any questions or concerns about our products, please feel free to contact us.

Harigai Industry Co., Ltd.

6139-1 Onogomachi, Joso City, Ibaraki (inside the Onogomachi Industrial Park)

+81-297-44-7333

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