Multilayer structures having annular profiles and methods...

B - Operations – Transporting – 29 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B29C 47/06 (2006.01) B29C 47/02 (2006.01) B29C 47/70 (2006.01) B29C 49/04 (2006.01) B29C 49/22 (2006.01) B29C 55/28 (2006.01)

Patent

CA 2753182

Disclosed are multilayer film structures having annular profiles, and methods and apparatus of making the struc-tures disclosed. The annular multilayer articles have a uniform thickness, at least four layers and comprise overlapped and non--overlapped circumferential areas; wherein the layer structure of the non- overlapped area is doubled in the overlapped layer. A method of making the structure includes providing a multilayer flow stream with at least four layers of thermoplastic resinous ma-terials; feeding the multilayer flow stream to a distribution manifold of an annular die to form an annular multilayer flow stream; and removing the annular multilayer flow stream from the annular die to form the annular multilayer structure. Also disclosed is an apparatus, comprising: a feedblock, with optional layer multiplier, that provides a multilayer flow stream of at least four layers to the manifold of an annular die; and an annular die having at least one distribution manifold that extrudes a multilayer flow stream.

L'invention porte sur des structures de film multicouches présentant des profils annulaires, et sur des procédés et des appareils de fabrication des structures décrites. Les articles multicouches annulaires présentent une épaisseur uniforme, au moins quatre couches, et comprennent des zones périphériques chevauchées et non chevauchées ; la structure de couche de la zone non chevauchée étant doublée dans la couche chevauchée. Un procédé de fabrication de la structure comporte l'opération consistant à prévoir un flux d'écoulement multicouche avec au moins quatre couches de matériaux résineux thermoplastiques ; l'alimentation du flux d'écoulement multicouche vers un collecteur de distribution d'une filière annulaire pour former un flux d'écoulement multicouche annulaire ; et l'élimination du flux d'écoulement multicouche de la filière annulaire pour former la structure multicouche annulaire. L'invention porte également sur un appareil comprenant : un bloc d'entraînement, avec un multiplicateur de couche facultatif, qui fournit un flux d'écoulement multicouche d'au moins quatre couches au collecteur d'une filière annulaire ; et une filière annulaire présentant au moins un collecteur de distribution qui extrude un flux d'écoulement multicouche.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Multilayer structures having annular profiles and methods... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multilayer structures having annular profiles and methods..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayer structures having annular profiles and methods... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1447521

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.