Molding Compounds and Molded Parts
Phenolic Molding Compounds


We offer our Phenolic molding compounds with 30 years over experience to meet customers' needs such as weight saving, cost saving and design flexibility.
Phenolic molding compounds are reinforced with glass fiber, organic filler or inorganic filler.


  • Shizuoka Plant
  • Yamaroku Kasei Industry Co., Ltd.
  • SumiDurez Singapore Pte. Ltd. (Singapore)
  • Sumitomo Bakelite (Suzhou) Co., Ltd. (China)
  • Sumitomo Bakelite (Nantong) Co., Ltd. (China)
  • Sumitomo Bakelite North America, Inc. (USA)
  • Durez Canada Co., Ltd. (Canada)
  • Vyncolit NV (Belgium)


  • High Performance Plastic Technology Development Laboratory
  • Sumitomo Bakelite North America, Inc. (USA)
  • Vyncolit NV (Belgium)


Non-ammonia material

Our high reliable non-ammonia grade has extremely low metal corrosion and excellent electrical properties.

Excellent solder heat resistance

High heat resistance over 400°C meets high cycle requirement in solder reflow process of SMT.

Non-halogen flame retardant materials

Many kinds of thermoplastics lose their mechanical strength to get non-halogen flame retardancy. Our non-halogen flame retardant phenolic molding compounds for transformer bobbin has high mechanical strength with cost-effectiveness.
Major grades are approved for UL1446 insulation system (Class B).

Tracking resistance (CTI:250V) compliant

Good balance of CTI (comparative tracking index) and mechanical strength for high frequency and high voltage requirement in electrical components.

Commutator materials

Excellent mechanical strength, heat resistance, humidity resistance and dimensional stability improve revolution at burst and bar-to-bar movement for noise reduction and brush wear. Processability such as slitting, press-fitting of shaft and fusing is also excellent.

High reliability

Outperform engineering thermoplastic with high heat resistance, rigidity at high temperature and good creep property at high temperature.

Good dimensional stability

Good transcription ability to cavity and good dimensional stability.

Wide range of design flexibility

Good moldability for wide range of thickness from thin parts (100microns) to thick parts (tens of mm), complicated shape or uneven thickness parts.

Environmental compatibility

Environmental loading
material free
Asbestos free, halogen free
Recycle Thermal recycle
Material recycle
We develop the world's first Chemical Recycle Technology for Phenolics.

Chemical Recycle Demonstration Plant (Shizuoka)


Electrical and Eelectronic Equipment

Electronic Component


Transformer bobbins for SMT and circuit breakers


Home appliance

Switch cases and commutator for small motors


Automotive Mechanical Components


Front End Accessory Drive Pulley, Cooling parts (water pump cover, impeller, thermostat housing, ...), transmission parts (AT stator, DCT valve block, hydraulic valve parts, ...)


Commutator, brush holder, slip ling, starter solenoid cover, ...


Disc brake caliper piston, booster valve body, ...


Window regulator housing, air spring guide bush, ash tray, ...

Fuel control

Fuel pump impeller, fuel pump case, ...

Exhibitions More

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