Uniaxially oriented multilayer film

Details Uniaxially oriented multilayer film Uniaxially oriented multilayer film

B - Operations, Transporting

32

B

B32B 27/32 (2006.01)

Patent

CA 2671792

The present invention provides a uniaxially oriented multilayer film comprising at least (i) a layer (A) and (ii) a layer (B), wherein said layer (A) comprises a linear low density polyethylene (LLDPE) comprising (e.g. selected from): - a multimodal LLDPE produced using a Ziegler Natta catalyst (znLLDPE), or - a LLDPE produced using a single site catalyst (mLLDPE) or - a mixture of a mLLDPE and a multimodal znLLDPE, said layer (B) comprises a multimodal LLDPE, and said multilayer film is in the form of a stretched film which is uniaxially oriented in the machine direction (MD) in a draw ratio of at least 1:3.

La présente invention concerne une pellicule multicouche à orientation uniaxiale, comprenant au moins (i) une couche (A) et (ii) une couche (B). La couche (A) comprend un polyéthylène basse densité linéaire (LLDPE) comportant (notamment): - un LLDPE multimodal produit à l'aide d'un catalyseur Ziegler-Natta (znLLDPE) ou - un LLDPE produit à l'aide d'un catalyseur monosite (mLLDPE) ou - un mélange d'un mLLDPE et d'un znLLDPE multimodal. La couche (B) comprend un LLDPE multimodal et la pellicule multicouche se présente sous forme de pellicule tendue orientée de façon uniaxiale dans le sens machine (SM), avec un rapport d'étirage d'au moins 1:3.

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