Covestro Makrolon 6557 PC

 Covestro Makrolon 6557 FR PC Description 

Makrolon 6557 FR PC is manufactured at multiple locations; we give priority to the product manufactured by Covestro Shanghai Investment Company.

The standard color for Makrolon 6557 PC resin is Makrolon 6557 550115 - clear PC resin. As shown in the image on the left, it is available in both disc-shaped and cylindrical pellets; the two differ only in shape and show no significant difference in performance. Please contact us if you require a custom color.👉+86 15837933829

Covestro Makrolon 6557 FR PC Advantage

• Flame retardant PC, Covestro 6557 FR PC utilizes a potassium perfluorobutylsulfate (PPFBS) flame-retardant system, which provides the material with highly effective flame-retardant properties (UL 94 V0 @ 3.0mm thickness), while remaining halogen-free. It is a halogen free FR PC suitable for use in regions with stringent environmental regulations, such as Europe and the United States.
• UV resistant PC material. Compared to Makrolon 6555, Makrolon 6557 FR PC contains UV-stabilizing additives, allowing products made from it to be used outdoors for extended periods without significant performance degradation.
• Good machinability, Makrolon 6557 halogen-free, flame-retardant PC resin has a melt volume rate (MVR) of 10 g/10 min under test conditions of 300°C and 1.2 kg. With moderate flow rate and viscosity, In addition, this material contains a release agent, making it easier to process than Makrolon 6555 FR PC.

Why choose Baiyou as Covestro Makrolon 6557 FR PC supplier?

• Leading flame retardant polycarbonate supplier (FR PC material) , 20+ years of experience in plastic product manufacturing and chemical raw material import and export
• Fastest Arrival, with warehouses in multiple ports
• 1,000+ types of resins are available, and we have cooperated with large petrochemical groups for 30+ years
• Free Samples for production testing
• Wholesale price, even a piece of goods is based on the wholesale price

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 Key Attributes 

Covestro Makrolon 6557 FR PC
Product information
Manufacturer		Covestro AG
Other Certificates		MSDS
Part Marking Code		>PC material<
Color		Transparent polycarbonate
Material Shape		FR PC Pellets
Process		Injection molding
Features		·Flame retardant ·UL 94 V0 ·Medium viscosity ·UV stabilized
Additives		·Mold release ·UV stabilizer
Physical properties	Standard	Value	Unit
Density	ISO 1183	1200	kg/m³
Bulk Density	ISO 60	640	kg/m³
Melt volume rate, MVR at 300℃/1.2kg	ISO 1133	10	cm³/10min
Melt mass flow rate, MVR at 300℃/1.2kg	ISO 1133	10	g/10min
Mold shrinkage, parallel, 60*60*2 mm³/ 500bar	ISO 294-4	0.65	%
Mold shrinkage, normal, 60*60*2 mm³/ 500bar	ISO 294-4	0.70	%
Mold shrinkage, normal/parallel	ISO 2577	0.6-0.8	%
Water absorption, saturation, water at 23℃	ISO 62	0.3	%
Water absorption, equilibrium, 23℃ 50 % r.h.	ISO 62	0.12	%
Water vapor permeability, 23℃ 85 % RH/ 100 μm film	ISO 15106	15	g/(㎡·24 h)
Mechanical behavior (23℃/50% r.h)	Standard	Value	Unit
Tensile modulus, 1 mm/min	ISO 527	2400	MPa
Tensile stress, yield, 50 mm/min	ISO 527	66	MPa
Tensile strain, yield, 50 mm/min	ISO 527	6.1	%
Norminal strain at break, 50 mm/min	ISO 527	>50	%
Stress at break	ISO 527	70	MPa
Strain at break	ISO 527	130	MPa
Flexural modulus, 2 mm/min	ISO 178	2400	MPa
Flexural strength, 2 mm/min	ISO 178	99	MPa
Flexural strain at flexural strength, 2 mm/min	ISO 178	7	%
Flexural stress at 3.5% strain	ISO 178	75	MPa
Ball indentation hardness, 358 N	ISO 2039	115	N/m㎡
Tensile creep modulus, 1 h	ISO 899	2200	MPa
Tensile creep modulus, 1000 h	ISO 899	1900	MPa
Impact	Standard	Value	Unit
Izod notched impact, 23℃, 3mm	ISO 180/1A	65P	kJ/㎡
Izod notched impact, -30℃, 3mm	ISO 180/1A	12C	kJ/㎡
Charpy impact strength, 23℃	ISO 179/1eU	N	kJ/㎡
Charpy impact strength, -30℃	ISO 179/1eU	N	kJ/㎡
Charpy impact strength, -60℃	ISO 179/1eU	N	kJ/㎡
Charpy notched impact strength, 23℃, 3 mm	ISO 179/1eA	70P	kJ/㎡
Charpy notched impact strength, -30℃, 3 mm	ISO 179/1eA	14C	kJ/㎡
Puncture impact properties - maximum force, 23℃	ISO 6603-2	5400	N
Puncture impact properties - maximum force, -30℃	ISO 6603-2	6300	N
Puncture energy,23℃	ISO 6603-2	60	J
Puncture energy, -30℃	ISO 6603-2	65	J
Thermal	Standard	Value	Unit
Temperature of deflection under load 1.8 MPa	ISO 75	124	°C
Temperature of deflection under load 0.45 MPa	ISO 75	136	°C
Glass transition temperature, 10℃/min	ISO 11357	145	°C
Vicat Softening Temperature, rate B/50	ISO 306	143	°C
Vicat Softening Temperature, rate B/120	ISO 306	144	°C
Coefficient of liear thermal expansion, parallel 23 to 55 ℃	ISO 11359	0.65	10⁻⁴/K
Coefficient of liear thermal expansion, normal 23 to 55 ℃	ISO 11359	0.65	10⁻⁴/K
Thermal conductivity, through - plane, 23℃ 50 % r.h.	ISO 8032	0.2	W/(m·K)
Relative temperature index (RTI, Tensile impact strength, 1.5mm	UL 746B	115	°C
Relative temperature index (RTI, Tensile strength, 1.5mm	UL 746B	125	°C
Relative temperature index (RTI, Electric strength, 1.5mm	UL 746B	125	°C
Electrical	Standard	Value	Unit
Volume resistivity	IEC 62631	1E14	Ohm·m
Surface resistivity	IEC 62631	1E16	Ohm
Electrical strength, 1 mm	IEC 60243-1	34	kV/mm
Comparative tracking index CTI, solution A	IEC 60112	225
Dielectrics strength, in oil, 3.2mm	IEC 60243-1	17	kV/mm
Relative permittivity,100 Hz	IEC 60250	3.1
Relative permittivity,1 MHz	IEC 60250	3.0
Dissipation factor, 100 Hz	IEC 60250	8	10⁻⁴
Dissipation factor, 1 MHz	IEC 60250	90	10⁻⁴
Electrolytic corrosion	IEC 60426	A1
Flame retardant	Standard	Value	Unit
UL recognized, UL94 V-0 Flame Class Rating	UL 94	3.0	mm
UL recognized, UL94 V-2 Flame Class Rating 2nd value	UL 94	0.75	mm
Glow wire flammability index (GWFI) 900℃, passes at	IEC 60695-2-12	0.75	mm
Glow wire flammability index (GWFI) 960℃, passes at	IEC 60695-2-12	1.5	mm
Glow wire flammability index (GWFI) 960℃, passes at	IEC 60695-2-12	3.0	mm
Glow wire test (GWIT) 875℃, passes at	IEC 60695-2-13	0.75	mm
Glow wire test (GWIT) 960℃, passes at	IEC 60695-2-13	1.5	mm
Glow wire test (GWIT) 960℃, passes at	IEC 60695-2-13	3.0	mm
Burning rate (US-FMVSS)	ISO 3795	≥1.0 mm
Flash ignition temperature	ASTM D1929	460	℃
Spontaneous ignition temperature	ASTM D1929	530	℃
Oxygen index, method A	ISO 4589	36	%
Optical	Standard	Value	Unit
Luminous transmittance (clear transparent materials), 1 mm	ISO 13468	89	%
Luminous transmittance (clear transparent materials), 2 mm	ISO 13468	89	%
Luminous transmittance (clear transparent materials), 3 mm	ISO 13468	88	%
Luminous transmittance (clear transparent materials), 4 mm	ISO 13468	87	%
Refractive index, procedure A	ISO 489	1.586

 Partners 

We have established long-term relationships with 80+ well-known  companies around the world

 Warehouse And Shipping 

20+ years' experience consultant with a supply chain of 1000+ plastic raw materials in China.

Quantity (tonnes)	1-100	100-300	>300
Lead time (days)	7-10	10-15	To be negotiated

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References and Notes

1. Covestro,"safety data sheet of covestro makrolon 6557 flame retardant PC resin", Covestro AG, 03/07/2026
2. Covestro,"Covestro Products sheet of Makrolon 6557 PC", Covestro AG, 03/07/2026