Extrusion & Post
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thickness deviation Occurring in the cooling and sizing Stage of Biaxially oriented polypropylene film
Fenómeno del problema
thickness deviation occurs in the film during the cooling and sizing stage, affecting production stability and product quality.
Biaxially oriented polypropylene film is sensitive to the process parameters of this stage.
Análisis de la causa
(1) The process parameters of the cooling and sizing stage are set improperly
(2) The equipment condition or precision is insufficient
(3) Raw material characteristics (biaxial stretching, longitudinal and transverse stretch ratio control, high stiffness, good transparency) cause processing difficulties
(4) The environmental conditions (temperature and humidity) are unsuitable
(5) Improper operation or inadequate monitoring
Solución
(1) Optimize the process parameters of the cooling and sizing stage, and control the temperature within the range of 140-170(stretching)/230-260(extrusion)°C
(2) Check and maintain the equipment to ensure operating precision
(3) Select processing process parameters suitable for biaxially oriented polypropylene film
(4) Control the temperature and humidity of the production environment
(5) Strengthen operation training and process monitoring
Conclusión clave
The process parameters of each stage of film production need to be precisely controlled; equipment condition and raw material quality are the foundation.
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