Treofan Germany Gmbh & Co. Kg

Borealis Technology Oy

Thilo Mohr

Detlef Busch

Bertram Schmitz

Christian Peters

Joachim Fiebig

Yvo Daniels

Franck Jacobs

Frank Jacobs

The invention relates to a biaxially oriented electrical insulating film which is constituted of a base layer and at least one cover layer, the base layer containing a mixture from a polypropylene P1 and a polypropylene P2 which is different therefrom, the polypropylene P1 being a linear polypropylene and having an Mw/Mn&#x3e;5 and a mesopentadene isotactic index of at least 95% and the polypropylene P2 having a long-chain branching.

Biaxially oriented electrical insulating film

The invention relates to a biaxially oriented microporous film composed of at least two coextruded layers encompassing an external shut-off layer and another layer, wherein both layers contain a mixture of propylene homopolymer and propylene block copolymer and &#x3b2;-nucleation agent. The propylene block copolymer I of the other layer has a melting point exceeding 140&#xb0; C. and the propylene block copolymer II of the external shut-off layer has a melting range starting at a temperature ranging from 50 to 120&#xb0; C. The melting point of the propylene block copolymer I is greater than the melting point of the propylene block copolymer II. The film can be used as a separator in a primary or secondary battery.

Membrane file for batteries, having a shut-off function

The invention relates to a biaxially oriented microporous film composed of at least three coextruded layers encompassing an internal cut-off layer and two external layers, wherein all three layers contain a mixture of propylene homopolymer and propylene block copolymer and &#x3b2;-nucleation agent. The propylene block copolymer I of the external layers has a melting point exceeding 140&#xb0; C. and the propylene block copolymer II of the internal layer has a melting range starting at a temperature ranging from 50 to 120&#xb0; C. and the melting point of the propylene block copolymer I is greater than the melting point of the propylene block copolymer II.

Micro-porous multi-layer membrane film based on polypropylene for batteries with a cut-off function

The invention relates to a biaxially oriented, single-layer microporous film which has a shut-off function and is made of propylene homopolymer, propylene block copolymer I and &#x3b2;-nucleation agent. The melting range of the propylene block copolymer I starts at a temperature ranging from 50 to 120&#xb0; C. The invention also relates to using the film as a separator in primary or secondary battery.

Single-layer polypropylene membrane film for batteries, having a shut-off function

The invention relates to a biaxially oriented electrical insulating film which contains a mixture from a polypropylene P1 and a polypropylene P2 which is different therefrom. The polypropylene P1 is a linear polypropylene and has an Mw/Mn&#x3e;5 and a mesopentadene isotactic index of at least 95% and the polypropylene P2 has a long-chain branching.

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Homburg, Germany

Thilo Mohr