Sizing agent for Carbon fiber "CHEMITYLEN" series

Carbon fibers with less fluff and excellent processability are obtained, contributing to the production of high-strength and highly reliable (Carbon Fiber Reinforced Polymer) CFRP.

What’s great about “CHEMITYLEN”

  • Uses
  • Features
  • Line-up
  • Related information

Sanyo Chemical's "CHEMITYLEN" Products Binder/Sizing Agent for Carbon Fibers

1. Modified carbon fibers by "CHEMITYLEN"

High-quality carbon fibers with excellent handling and processability are obtained by using “CHEMITYLEN”

  • It prevents fluffing by imparting properties, facilitates handling, and protects carbon fibers from damage in the processing.
  • The resulting carbon fiber bundles are flexible, have excellent texture, and high processability (openability* and cuttability).
  • Improves impregnation of matrix resin.

*Fiber opening property: A property that enables thin and uniform spreading of carbon fibers in the fiber opening process, in which carbon fiber bundles are unraveled to spread carbon fibers in order to facilitate impregnation of the matrix resin.

2. Modified carbon fibers reinforced plastic (CFRP) by "CHEMITYLEN"

  • Fibers are easily arranged in a homogeneous manner while maintaining fiber length, resulting in CFRP with excellent fiber homogeneity.  The adhesion between carbon fibers and matrix resin is also excellent, resulting in high strength.
  • The undulations of the yarn can be reduced, and CFRP with excellent surface smoothness can be obtained.
  • It also has excellent heat resistance.

3. Various lineups for different applications

We have a diverse lineup of products for various applications.

  • “CHEMITYLEN HP, EP” products with excellent impregnability to epoxy resins
  • “CHEMITYLEN UA” products with excellent flexibility and cuttability.
  • “CHEMITYLEN WS” products with good dispersibility in water and the ability to wash off the sizing agent component from carbon fibers

“CHEMITYLEN” products are sizing agents that bind carbon fibers together for easier handling.

"CHEMITYLEN" products, sizing agents, are used in a variety of carbon fiber composite products.

Carbon fiber composite materials can achieve both high strength and lightweight, contributing to energy saving and reduction of environmental impact in various fields.

Examples of Uses

1. Pressure vessel

Molded by filament winding using sized carbon fibers.

2. Wind turbine components

Test

Molded by pull-torsion using sized carbon fibers.

3. Top panel for X-ray diagnostic equipment

Sized carbon fibers are used as prepreg and press molded.

4. Aircraft Components

Sized carbon fibers are used as prepreg and autoclave molded.

5. Automotive Components

Sized carbon fibers are woven and molded by RTM process (cured after pre-molding)

6. Laptop chassis

Sized carbon fibers are pelletized as chop fiber and then injection molded.

Features of each grade in the "CHEMITYLEN" products

ProductsFeaturesEffects
CHEMITYLEN HP・EP
(Polyester/Epoxy type)
Excellent impregnation of epoxy resin.Wets well with epoxy resin and produces high-strength FRP.
Excellent fiber-opening properties.Produces a wide, thin tow.
Less fluffing.Fiber length can be maintained and high-strength FRP can be made.
CHEMITYLEN UA
(Polyurethane type)
Excellent flexibility and cuttability.Produces flexible, easy-to-handle, easy-to-chop tow.
Excellent mixing stability with EP and HP series.The physical properties can be adjusted to your liking by mixing.
CHEMITYLEN WS
(Polyether type)
Good dispersibility in water.When you do not want to leave the sizing agent component on the surface of carbon fiber, it can be washed off with water.

"CHEMITYLEN EP・HP" products

Carbon fiber composite material after epoxy resin impregnation SEM photograph of cross-section (800x)

Fig. Carbon fiber composite material after epoxy resin impregnation SEM photograph of cross-section (800x)

Features

  • Excellent epoxy resin impregnation
  • Excellent bundling and opening properties
  • Less fluffing

General composition

  • Special polyester
  • Bisphenol A epoxy resin
  • Nonionic activator
  • Water

Comparison of performance between conventional sizing agents and "CHEMITYLEN EP and HP" products

ItemConventional sizing agents
(Main component: epoxy resin)
CHEMITYLEN EP-10CHEMITYLEN HP-10
Adhesion amount wt%1.51.51.5
Carbon fiber tow basic performance Fluff amount (mg) 2.90.70.5
Convergence (cm) 13.418.617.1
Openness (mm) 6.56.77.4
Epoxy resins aggregation (s)18.56.95.7
Emulsion stability Stability over time 25℃×6monthsFairGoodGood

"CHEMITYLEN UA" products

Fig. CHEMITYLEN UA products

Features

  • Moderate flexibility
  • Excellent cuttability
    Excellent cuttability due to excellent mixing stability with CHEMITYLEN EP and HP products.
  • Bundling and opening properties can be adjusted by mixing with EP and HP products.

General composition

  • Special polyurethane
  • Water

Comparison of performance between conventional sizing agent and "CHEMITYLEN UA-40"

ItemConventional sizing agent
(Main component: epoxy resin)
CHEMITYLEN UA-40
Adhesion amount wt%1.51
Convergence cm13.418.3
Cuttability

Mixing data of "CHEMITYLEN EP" and "CHEMITYLEN UA" products

Example of performance adjustment by mixing Chemtylen EP-10/UA-30

Example of performance adjustment by mixing Chemtylen EP-10/UA-30

  • Excellent mixing stability with CHEMITYLEN EP and HP products
  • The mixing stability of “CHEMITYLEN EP and HP” products is excellent, so bundling and opening properties can be adjusted by mixing.

"CHEMITYLEN WS" products

Features

A water-soluble type carbon fiber sizing agent with excellent solubility in water.

ItemCHEMITYLEN
WS-10
CHEMITYLEN
WS-20
Main compositionPolyether aqueous solutionModified polyether aqueous solution
Concentration5030
Viscosity (25°C, mPa-s)300025000

Comparison of performance between conventional sizing agent and "CHEMITYLEN" WS products

ItemConventional sizing agent
(Main component: epoxy resin)
CHEMITYLEN
WS-10
CHEMITYLEN
WS-20
Adhesion amount wt%1.51.51.5
Convergence cm13.413.123.8
Openness mm6.56.66.4

Main lineup of "CHEMITYLEN" products

"CHEMITYLEN" products performance list

ProductCarbon fiber tow performanceHeat resitance
convergencetackdensitometryfluffTg ℃*
CHEMITYLEN HP-10normalmidldleexcellentexcellent300
CHEMITYLEN EP-10goodmidldleexcellentgood310
CHEMITYLEN UA-10excellentweaknormalexcellent270
CHEMITYLEN UA-20excellentweakgoodexcellent250
CHEMITYLEN UA-30goodweakgoodgood270
CHEMITYLEN UA-40goodweakexcellentgood230
CHEMITYLEN WS-10poorstronggoodN/A220
CHEMITYLEN WS-20goodmidldlegoodN/A310

*Temperature at 5% thermal loss during heating of pure resin (in N2, temperature increase at 10°C/min)

List of properties of "CHEMITYLEN" Products

ProductLiquid typeConcentration % *Resin typeIonic species
CHEMITYLEN HP-10emulsion40modified polyesternonion
CHEMITYLEN EP-10emulsion40modified polyesternonion
CHEMITYLEN UA-10emulsion39modified polyurethaneanion
CHEMITYLEN UA-20emulsion38modified polyurethaneanion
CHEMITYLEN UA-30emulsion40modified polyurethaneanion
CHEMITYLEN UA-40emulsion35modified polyurethaneanion
CHEMITYLEN WS-10aqueous solution50polyether
CHEMITYLEN WS-20aqueous solution50modified polyether