functionalized polyolefin

13:32 Apr 2, 2007 

Μπόρεσα να βρω μονάχα τη θερμοπλαστική και την εύκαμπτη πολυολεφίνη στα ελληνικά. Επίσης βρήκα αυτό http://www.freepatentsonline.com/6093496.html ,αν σε βοηθά με κάποιο τρόπο. Αν είναι, περίμενε να δούμε τι θα πούνε και οι έξπερτ. :)

13:17 Apr 2, 2007 

..πολυολεφίνη μήπως είναι η flexible polyolefin?

13:15 Apr 2, 2007 

The packaging material is a sheet material having an exterior polyamide side and an opposite exterior polyolefin side comprising a laminate of a polyamide layer adhered to a polyolefin layer, which polyolefin layer is an exterior monolayer or coextrudate of two or more sublayers, wherein the monolayer or the exterior outmost sublayer is a binding layer comprising a functionalized polyolefin selected from the group consisting of olefin/vinylacetate copolymers, olefin/alkylacrylate copolymers, olefin/neutralized and olefin/partially neutralized carboxylic acid copolymers, carboxylic acid or anhydride grafted polyolefins, carboxylic acid or anhydride grafted olefin/vinylacetate copolymers, and carboxylic acid or anhydride grafted olefin/alkylacrylate copolymers; and optionally unmodified polyolefin and conventional additives, wherein the polyolefin layer of said sheet material is sealable to the polyamide layer of said sheet material and/or vice versa.

The lapseal binding layer comprises a functionalized polyolefin which in some cases may be used alone in case the functionality is low.

The vinylacetate, alkylacrylate or alkylacrylic acid monomers used to form the functionalized polyolefm decreases the melting temperature of the mixture allowing the lapseal binding layer to be sealed at lower temperatures.

On the other hand these monomers increase the polarity of the functionalized polyolefin allowing to facilitate the adhesion to polar substrates, such as PA.

Apart from a minor optional amount of conventional additives such as antiblocking agent and slip agent the lapseal binder is a functionalized polyolefin or a combination of a conventional, preferably unmodified polyolefin, and a functionalized polyolefin.

In case the functionalized polyolefin is a conventional tie resin the amount of functionalized polyolefin is typically 20 - 80 % by weight, preferably 35 - 65 % by weight.