Dow Global Technolgoies LLC

Kurt Brunner

Nicolas Cardoso Mazzola

Jozef Van Dun

Claudia Hernandez

Gert Johannes Claasen

Shaun Parkinson

Maria Isabel Arroyo Villan

Thomas Galatik

Peter Sandkuehler

Chuan Yar Lai

Jozef Ji Van Dun

Hans Jörg Forster

Jozef JI Van Dun

Barbara Bonavoglia

The present invention concerns a film (), which contains at least one inner layer () and two outer layers () enclosing at least one inner layer () where the, at least one, inner layer () contains a polymer A in a quantity from 70 to 100 wt. %, preferably 80 to 99 wt. % and especially preferably from 90 to 99 wt. %, relative to the total weight of the inner layer (), which is characterized by special interesting properties, where the outer layers () contain a mixture of polymer A and a polymer B, where polymer B is selected from the group consisting of low-density polyethylenes, said film () having a thickness from 30 to 70 &#x3bc;m, preferably 35 to 60 &#x3bc;m and especially 40 to 55 and an elastic restoring capacity of more than 95% at an elongation of 55%. The present invention also concerns a process for the production of a film, the use of the wealth. As a stretch-sleeve up film and articles provided with the oil of the invention, such as packaging. The present disclosure is directed to a stretch-sleeve film and articles including the stretch-sleeve film. The stretch-sleeve film includes at least three layers including two skin layers and a core layer. The core layer includes at least 75 wt % of an ethylene/a-olefin copolymer (A) characterized by (i) a density from 0.890 g/cc to 0.920 g/cc; (ii) a Mw/Mn from 2.0 to 4.0; (iii) a ZSVR less than 6.0; and (iv) a CDC from 85 to 150. At least one skin layer includes a polymeric material selected from the ethylene/a-olefin copolymer (A), a low density polyethylene, a medium density polyethylene, and combinations thereof. The stretch-sleeve film has an elastic recovery at 55% stretch of at least 95%.

Stretch-sleeve film

The present disclosure is directed to compositions and film structures suitable for heat seal production. The heat sealable flexible film structure includes: a layer (A) comprising a blend comprising from 35 to 80 percent by weight of the layer (A) of a propylene based plastomer or elastomer ('PBPE') and from 20 to 65 percent by weight of the layer (A) of a low density polyethylene having a density in the range of from 0.915 g/cmto 0.935 g/cm, wherein the blend has a melt index (as determined according to ASTM D 1238 (at 190&#xb0; C./2.16 Kg); a layer (B), adjacent to layer (A), comprising a polyolefin-based polymer, wherein the polymer or polymer blend which makes up layer (B) flows more easily than the blend of layer (A) under conditions intended for making a hard seal with the film structure; and an outermost layer (C) comprising a material having a melting point greater than 140&#xb0; C.; wherein the ratio of the thickness of layer (B) to the thickness of layer (A) is 3:1 or greater. The heat sealable flexible film structure is used to make a flexible container having one or more heat seals. The heat seal can be a frangible heat seal, a hard heat seal, or a combination of frangible heat seals and hard heat seals depending on the sealing conditions.

Flexible film composition for heat seals and container with same

The present disclosure is directed to compositions and film structures suitable for heat seal production. The heat sealable flexible film structure includes: a layer (A) comprising a propylene-based plastomer or elastomer ('PBPE') and a low density polyethylene; a layer (B), adjacent to layer (A), comprising at least 50 percent by weight of the layer (B) of an ethylene-based polymer; and an outermost layer (C) comprising a material having a melting point greater than 140&#xb0; C. Weight percents are based on the total weight of the respective layer. The heat sealable flexible film structure is used to make a flexible container () having one or more heat seals (). The heat seal () can be a frangible heat seal, a hard heat seal, or a combination thereof.

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Zurich, Switzerland

Kurt Brunner