Troubleshooting guide Geo Membrane Extrusion Applications
Geo Membrane Extrusion Troubleshooting
Problem
Probable Cause
Suggested Remedy
Temperature Setting
Temperature setting are crucial parameter for proper plastic processing ,hence one should check temperature controller, thermocouple and solid state relay(SSR)
- when you cold start the machine ,wait for 2hours.
Uneven thickness across width
1. Improper die gap adjustment
2. Temperature variation across die
3. Unstable extrusion pressure
1. Adjust die gap and calibrate regularly
2. Ensure uniform heating across die zones
3. Stabilize melt pressure and flow
1. Moisture in resin
2. Resin contamination
3. Poor filtration
1. Pre-dry resin properly
2. Use clean resin and proper handling
3. Use finer mesh in screen changer
Surface defects (gels, die lines, scratches)
1. Degraded polymer build-up in die
2. Dust/contamination
3. Worn die lips
1. Clean die lips frequently
2. Maintain clean processing environment
3. Refinish or replace worn die lips
Poor tensile/tear strength
1. Low molecular weight resin
2. Improper cooling rate
3. Inadequate orientation
1. Use high molecular weight resin grades
2. Optimize cooling roll temperature
3. Improve draw ratio/orientation
High shrinkage
1. Insufficient annealing/heat-setting
2. High quench bath or roll temperature
3. Resin shrinkage property
1. Introduce proper annealing stage
2. Reduce cooling roll temperature
3. Use resin with low shrinkage tendency
1. Inconsistent film surface
2. Low melt strength resin
3. Improper stabilization
1. Ensure smooth, uniform surface finish
2. Select resin with good melt strength
3. Use well-stabilized resin with antioxidants
1. Insufficient UV stabilizer
2. Poor dispersion of additives
3. Low-grade resin
1. Add UV masterbatch at proper dosage
2. Ensure uniform mixing of stabilizers
3. Use UV-stabilized resin grades
1. Improper tension control
2. Uneven cooling across film width
3. Winder misalignment
1. Adjust line and winding tension
2. Improve cooling uniformity across rolls
3. Align winding rolls properly
