B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B32B 27/30 (2006.01) B60K 15/00 (2006.01) F02M 37/00 (2006.01) F16L 9/12 (2006.01) F16L 11/04 (2006.01) B60K 15/01 (2006.01)
Patent
CA 2275349
The invention concerns a plastic based multilayer structure, in particular for making tubes or conduits for transporting liquid fluids such as alcohol, liquid fuels derived from petrol, fuels containing oxygenic compounds such as, for instance alcohol. More particularly it concerns a multilayer structure with improved barrier properties, in particular with respect to the fluids mentioned above. Said structure comprises an external layer (A) formed from a polyamide based composition with and an internal adjacent layer (B) formed from a polyfluorovinylidene based composition. The adherence between these two layers is obtained either by adding a polyacrylate compound commercialised under the registered trade mark RESEDA in the polymer forming the layer (B) or by forming an intermediate layer between the adjacent layers (A) and (B) from a composition containing said RESEDA compound.
La présente invention concerne une structure multicouche à base de plastique, notamment convenable pour la fabrication de tubes ou conduits destinés à transporter des fluides liquides comme des alcools, des carburants liquides provenant du pétrole, des carburants pouvant contenir des composés oxygénés tels que, par exemple, des alcools. Elle concerne plus particulièrement une structure multicouche présentant des propriétés barrières améliorées, notamment vis-à-vis des fluides indiqués ci-dessus. Cette structure comprend une couche externe (A) formée à partir d'une composition à base d'un polyamide et une couche interne (B) adjacente formée à partir d'une composition à base de polyfluorovinylidène. L'adhérence entre ces deux couches est obtenue soit par addition d'un composé polyacrylate commercialisé sous le nom commercial RESEDA dans le polymère formant la couche (B) soit par formation d'une couche intermédiaire entre les couches adjacentes (A et B) à partir d'une composition comprenant ledit composé RESEDA.
Nyltech Italia
Robic
LandOfFree
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