LFT Processing Guidance And Suggestions

Blog

Tags

LFT Processing Guidance and Suggestions 2021-04-23

Introducation

LFT-G is the product name for long fiber reinforced thermoplastic materials for injection moldings,compression molding and extrusion.Retention of fiber length in the finished part is key to the performance .Fiber length is retained by proper use of free flowing check valves,metering screws and a complete evaluation of the mold to reduce high shear and allow the materials to fill the part while maintaining the critical fiber length.The fiber is continuous within the pellet can offers incredible properties and performance when molded correctly.

General guidelines for injection molding

Injection Molding Machine Considerations：
- Use a metering screw for plasticizing and delivery of material to mold.
- 2:1 or 3:1 compression ratio
- 40% feeding
- 40% transition
- 20% metering
- 18:1 to 24:1 l/d ratio
- Feed zone depth minimum 7.5mm
- Metering zone depth minimum 3.5mm
Mold with a 100 ton (or higher) machine for best performance
Use a free flow check valve to reduce shear
Use a large open bore nozzle to reduce shear.
Keep back pressure between 0.15MPa and 0.35MPa

LFT Processing guide