Biograde WS-50

Supplier: Biograde Limited
Product type:
Thermoplastic >> TPS (Thermoplastic Starch)

Product performance

Water soluble, biodegradable and compostable resin for manufacture of plastic film based on thermoplastic starch (TPS). The solubility of the film is controllable and it dissolution increases with... 

  • Material Status
  • Commercial
Conversion Mode
Extrusion >> Films (blown)
- Cold aeration
10 - 15 °C
1. The resin is very sensitive to temperature during the film blowing process. Please be cautious of the temperature used during extrusion and film blowing. As a reference, the film-blowing temperatures successfully used by the manufacturer are: 160 to 185 deg. C. 2. Before blowing the film, the film blowing extruder needs to be purged and cleaned of residual polyethylene and then the WS- 50 resin can be used as the last cleaning step, after which the temperature can be adjusted to the correct settings. 3. The screw rotation speed should be slow at first and then fast to match the haulage speed which is first slow and then fast as well. 4. The inside and outside aeration should be gradually changed from weak to strong. Cold aeration is better; 10-15 deg.C works to avoid film blocking problems. 5. The preferred blow-up ratio is 1:2.5 or 1:3. The height from die orifice to the nip roll should be higher than 2.5 m to ensure full cooling and prevent film blocking. A screw with a blow up ratio of 1:28 is recommended. 6. The optimum sealing temperature for bags manufactured with WS-50 is 150 deg. C.

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