Overview
ABSTRACT
This article firstly describes the historical development of coextrusion and focuses on its impact on the maket of foils and sheets. After mentioning the typical drawbacks generated by the deformations and interfacial instabilities, it describes two generic technologies i.e. the coextrusion box and the multichannel sector, highlighting the details of the design of materials placed on the market. It then mentions the ongoing developments concerning layer multipliers and the continuous measurement by IR gauge of the layers thickness. It finally deals with the multilayer coextrusion, a lesser known aspect of the subject and yet worthy of interest.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
-
Francis PINSOLLE: ENSEM engineer (École nationale supérieure d'électricité et de mécanique de Nancy), - Master of Sciences from Philadelphia University (U of P), - IAE (Aix-en-Provence Institute of Business Administration)
INTRODUCTION
In less than forty years, coextrusion has become a major technological component of extrusion.
In every field, from tube to sheet, from profile to plate, from bottle to blown film, it is at the heart of manufacturing processes. Among other things, it can be used to incorporate :
a protective layer on the outside of the profile;
a flexible joint on a rigid profile;
a color and/or protective layer on the surface of a sheet or plate;
an inner barrier layer in a sheet, tube or bottle;
scratches on the outside of tubes and straws (used for drinking);
an internal recycling layer, etc.
In particular, coextrusion is ubiquitous in sheet and plate production, to the extent that virtually every line sold today incorporates several extruders.
The Ultimate Scientific and Technical Reference
This article is included in
Plastics and composites
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Sheet and plate co-extrusion
Coextrusion process
Bibliography
Software tools
Contour Die™ (EDI) http://www.extrusiondies.com
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
EDI
Welex
Cloeren
...
The Ultimate Scientific and Technical Reference
