Blown Film Coextrusion Die: 3-5 Layer Components

[zaina]

what are the components of blown film coextrusion die (three to five layers)

 

[FredGarvin]

I'm not an expert by any means on the topic. However, from reading up on it, there appear to be many designs of dies used in the coextrusion process. I couldn't find a reference to 3 common components. I did find the attached in D.V. Rosato's "Extruding Plastics-A Practical Processing Handbook".

 

[zaina]

air supply to coextrusion die

thanks a lot FredGarvin

what are means of supplying air to these dies for blowing films

 

[FredGarvin]

What exactly do you mean by "what means?" Factories will have large compressed air facilities. The facilities will comprise of compressors, dryers and filtering that will provide the air required in terms of flow and quality, i.e. oil/water content.