What is Phenolic Molding Compound ?

Sumidurez

Chang Chun

Dowell Materials > What is Phenolic?

Phenolic Moulding Compound (PF) is also commonly known as "Bakelite". It is favorably used for various used due to the excellent heat resistant and dimentional stability.

Engineering Plastic can be categorized into two kinds of resin: Thermosetting resin and Thermoplastic resin. Phenolic Moulding Compound is thermosetting resin.

There are two types of phenolic resin - Novolac and Resol. Where Novolac is two stage compound. And Resol is one stage compound.

General specifications of Phenolic Molding Compound
Novolac (Two Stage)

The above two stage process generates three-dimensional reticulated structure and Ammonia Gas (NH₃) after injection or compression process.

Example of Novolac (two stage) phenolic molding compound are General Purpose and Heat Resistance grade from Chang Chun, Taiwan and Sumidurez, Singapore.
Resol (One Stage)

Resol (one stage) generate three-dimensional reticulated structure and water vapor (H₂O). As a result, NO ammonia gas is generated.

Example of Resol (One stage) phenolic molding compound are Sumikon PM9820 and PM9630 from Sumidurez, Singapore.

Phenolic molding material provided by Dowell Trading Co. Ltd.'s suppliers are manufactured by two major manufacturers - Chang Chun, Taiwan & Sumidurez, Singapore.

Because of the excellent heat resistant and dimentional stability, phenolic moulding compound is still be one of the most competitive product at all time.

General specifications of phenolic molding compound

Characteristic

The characteristic of phenolic resin is to be determined by it's physical properties, thermal properties and electrical properties.

For physical properties, several measurement have to be taken such as Impact Strength (ASTM D-256), Flexural Strength (ASTM D-790), Tensile strength (ASTM D-651), Compressive Strength (ASTM D-695), Molded Shrinkage (ASTM D-955).

For thermal properties, Heat resistance & Deflection Temp. (ASTM D-648), UL Flammability (UL-94) are taken.

For electrical properties, Insulation Resistance (ASTM D-257), Dielectric Strength (ASTM D-149), Volume Resistivity (ASMT D-257), Arc Resistance (ASTM D-495) are taken.

General Specification of Phenolic Molding Compound (PF)
Properties	Unit
Flexural strength	MPa	69 ~ 150
Compressive Strength	MPa	210 ~ 270
Tensile Strength	MPa	48 ~ 90
Impact, Izod	J/m	15 ~ 35 (Glass Filled)
Deflection Temp.	^oC	180 ~ 260
UL CTI	V	~ 300 Max.
UL Flammability	mm	94V-0 @ 0.40~6.40
Water absorption	%	0.20 ~ 0.50
Molded Shrinkage	%	0.40 ~ 1.10
Apparent density	g/cm³	Avg. 0.6
Specific Gravity		1.40 ~ 1.82

For Reference only.

Molding Conditions for PF