Top >Carbon Fiber Composite Materials

Carbon Fiber Composite Materials

Carbon fiber composite materials have been limitedly and professionally produced in Japan industry so far. Nowadays, molding companies of resins, metal processing manufacturers who have never been related with carbon fibers have got involved and developed new products and technologies. Especially the strong demand of light weight in automobiles market drives it fast.
We, K.Sakai can introduce a wide range of products from small quantities for prototype development to intermediate materials for mass production and also molded products.

Filament Fiber

It is a long fiber bundle composed of many single fibers. Japanese and overseas goods are available. We propose the best product according to the physical properties of thread, thickness and sizing material request from the customer.

Woven Fabric

It is a woven fabric composed of long fiber or staple yarn. It is possible to propose special fibers such as plain weave, twill weave, UD cross (sheet), hybrid fabric with aramid fiber and others.

Chopped Fiber

It is a cut fiber bundle in which PAN carbon fibers . The cutting size is from 3 to 50 mm and various sizing agents are adhered. The main cutting size is 3 mm and 6 mm, and the sizing amount ratio can be adjusted from 1.5 to 5%. Various sizing materials (epoxy, urethane, aromatic type, PA, PP etc) are available. There are many achievements in CFRP application, and it is under development to ABS, PP, PBT, PC, PA, PPS, PEEK and others.

Milled Fiber

It is a powder obtained by pulverizing PAN type carbon fiber and its particle size is 80 μm and 150 μm. For example, it is used for drills for ocean drilling and conductive paints.


Thermosetting Prepreg (CFRP)
It is a sheet-shaped intermediate material in semi-curing in which carbon fiber is impregnated with thermosetting resin such as epoxy, phenol and so on. Fast curing type is also available.
Thermoplastic Prepreg (CFRTP)
It is an intermediate material for sheet molding which impregnated carbon fiber with thermoplastic resin such as PP or PMMA.
Resin for Thermosetting Prepreg
Epoxy or urethane acrylate fast curing type resin.
Urethane acrylate type resin provides CFRP with excellent physical properties. There is no need for extremely cold storage. It is highly adhered to carbon fiber surface-treated for epoxy resin. Moreover, it can be applied to various molding methods because of easy viscosity adjustment. Excellent in adhesion to glass fiber, basalt fiber, aramid fiber.

Different Material Adhesive

It is a two component acrylic strength adhesive which was devised for bonding of composite material, thermoplastic plastic and metal. If you clean and bond the surface of the adhesive base without requiring a primer, it shows clearance filling ability and high toughness up to 5 mm at all adhesion points.
Recommended Substrate
  • Composite Material
  • Carbon fiber(CFRP)
  • Glass(GFRP)
  • Epoxy
  • Vinyl ester
  • Urethane
  • Gel coat
  • Metals
  • Aluminum
  • SUS
  • Carbon steel
  • Powder coated steel plate
  • Thermoplastics
  • PMMA
  • PS
  • ABS
  • PVC


  • Aerospace field


    Airplanes, Aerospaces, Artificial satellites etc

  • Railway field


    Railways, Railroad cars, Shinkansen etc

  • Auto parts

    Automobile Parts

    Relief valves, Disc pads, Brake linings, Clutch facings etc

  • Industrial field

    Industrial Market

    Robot hands, Arms, Frames, Laptop computers etc

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