Technical Guide: Troubleshooting Yarn Breakage in PPH-T03 Raffia Production
Overview
In the production of woven bags and raffia, Polypropylene Homopolymer (PPH-T03) is favored for its high tensile strength. However, manufacturers often encounter “yarn breakage” during the stretching process. This guide provides a technical checklist to optimize your production line.
Common Causes of Yarn Breakage
1. Improper Temperature Profile
If the extrusion temperature is too low, the resin will not melt completely (cold spots), leading to weak points in the fiber. Conversely, if it is too high, thermal degradation occurs.
- Recommended Die Temperature: 230°C - 250°C
- Melt Temperature: Should be kept stable within ±2°C.
2. Moisture in Raw Materials
Although PP has low water absorption, surface moisture on granules or additives can cause micro-bubbles (silver streaks), which significantly reduce the tensile strength of the flat yarn.
Technical Tip: Ensure that any Masterbatch or Calcium Carbonate (CaCO3) filler used is properly pre-dried.
Optimized Processing Settings for IDKG PPH-T03
| Processing Zone | Recommended Temp (°C) |
|---|---|
| Feed Zone | 180 - 200 |
| Compression Zone | 210 - 230 |
| Metering Zone | 230 - 250 |
| Die Head | 245 - 255 |
Conclusion
Stability is the key to polymer processing. By maintaining a consistent thermal profile and ensuring material purity, you can achieve a zero-breakage production run with our PPH-T03 resin.
For a detailed COA (Certificate of Analysis) or more specific technical data, please contact our engineering team via the Contact Page.