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Flowing Enhancers

Polyester Flowing Agent F-S3500

F-S3500 is a flowing agent specially developed for polyesters (PBT/PET). The flowability is improved by ~33% with 1wt.% F-S3500 in PBT. Meanwhile, the thermal and mechanical properties are not affected obviously.

1. Materials

  • PBT: BASF ULTRADUR B4500
  • Flowing agent: Inovia F-S3500

2. Processing

  • Drying: 120℃, 3~5h.
  • Extrusion temperature: 195/235/240/235/235/230/230/230/235/240℃
  • Injection temperature: 235~245℃; mold temperature: 60℃

Note: "PBT" in the diagram refers to PBT pure resin after extruding.

3. Application Example Data

Table 1. Flowability


Test conditionPBT+1% F-S3500
MI (g/10min)250℃, 2.16 kg2128
Spiral flow lengthInjection: 240℃911
ScreenShot_2025-12-13_113637_671.jpg

Figure 1. Spiral flow length: PBT (left); PBT+1% F-S3500 (right)

Table 2. Mechanical, thermal properties


MethodUnitPBT+1% S3500
Flexural strengthISO 178MPa7572
Flexural modulusISO 178MPa24072303
Charpy notched impact strengthISO 179kJ/m²5.04.7
Charpy unnotched impact strengthISO 179kJ/m²NBNB
Tensile strengthISO 527MPa6058
Elongation at breakISO 527%18.518.1
HDT A (1.8 MPa)ISO 756359
VST (10N)ISO 306218218


Product TDS and SDS Files:

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Phone:001-720-990-0152
E-Mail:jeff@inoviamaterials.com
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