Chopped Carbon Fiber
Precision-Cut Carbon Fiber in High-Strength and Intermediate-Modulus Options
Phlex Carbon Fiber offers precision-cut, short-length chopped carbon fiber in two fiber grades: PhlexCarbon Chopped HSC and PhlexCarbon Chopped IMC
Both products are produced in Lake City, South Carolina, and are available in multiple fiber lengths with custom lengths available upon request. Seeded forms are also available to provide increased bulk density and improved flow and are ideally suited for automatic feeding and metering.
Understanding the Difference Between HSC and IMC
PhlexCarbon Chopped HSC is a high-strength, standard-modulus carbon fiber with a 7-micron filament diameter. PhlexCarbon Chopped IMC is an intermediate-modulus carbon fiber manufactured using aerospace-grade carbon fiber with a 5-micron filament diameter.
Their tensile properties also differ. PhlexCarbon Chopped HSC has a tensile strength of 640 ksi (4,413 MPa) and tensile modulus of 33.5 Msi (231 GPa), while PhlexCarbon Chopped IMC has a tensile strength of 795 ksi (5,480 MPa) and tensile modulus of 40 Msi (276 GPa).
Both products have a carbon density of 1.78 g/cm³, bulk density of 300–500 g/l, moisture content below 0.3%, and sizing content of 1.5% to 3.5%.
Flexible Fiber Lengths and Processing Options
Both PhlexCarbon Chopped HSC and PhlexCarbon Chopped IMC are available in 1/4-inch and 1/2-inch fiber lengths, with custom fiber lengths available upon reques
Both products can also be supplied in a “seeded” form, which provides increased bulk density and improved flow. Seeded forms are ideally suited for automatic feeding and metering.
PhlexCarbon Chopped HSC and PhlexCarbon Chopped IMC are packaged in 40 lb. boxes.
Typical Properties
| Property | PhlexCarbon Chopped HSC | PhlexCarbon Chopped IMC |
| Fiber Grade | High Strength (Standard Modulus) | Intermediate Modulu |
| Filament Diameter | 7 microns | 5 microns |
| Bulk Density | 300–500 g/l | 300–500 g/ |
| Moisture | <0.3% | <0.3% |
| Carbon Density | 1.78 g/cm | 1.78 g/cm³ |
| Sizing Content | 1.5%–3.5% | 1.5%–3.5% |
| Appearance | Black Pellets | Black Pellets |
| Tensile Strength, Yield | 640 ksi (4,413 MPa) | 795 ksi (5,480 MPa) |
| Tensile Modulus | 33.5 Msi (231 GPa) | 40 Msi (276 GPa) |
| Elongation at Break | 1.7% | 1.9% |
| Standard Fiber Lengths | 1/4", 1/2" | 1/4", 1/2" |
| Packaging | 40 lb. boxes | 40 lb. boxes |
Frequently asked questions
HSC is High Strength Carbon fiber with a typical tensile strength of ~640 ksi. IMC is Intermediate Modulus Carbon fiber and has a slightly higher tensile strength of ~795 ksi. Phlex Carbon can provide both chopped HSC and IMC grades.
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Find the Right Chopped Carbon Fiber for Your Requirements
Need help determining which chopped carbon fiber option aligns with your material and processing requirements? Talk with the Phlex Carbon Fiber team about PhlexCarbon Chopped HSC and PhlexCarbon Chopped IMC, available fiber lengths, seeded forms, sizing, and other product questions.