Film with improved flex crack resistance
AssigneeEntegris, Inc.
InventorsBrenna BROSCH, Amy KOLAND
Life of this patent
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Abstract
Provided herein are liners, for example, for storing or dispensing high purity chemicals, as well as methods of manufacturing such liners. The liners resist formation of stress-induced breaches. In one aspect, the liner includes a film formed into a liner capable of retaining a liquid. The liner has a first barrier layer to a gas (e.g., oxygen); a second barrier layer to the gas (e.g., oxygen); and at least one additional layer of material disposed interstitially between the first barrier layer and the second barrier layers.
Claims22
A liner that resists formation of stress-induced breaches, comprising a film formed into a liner capable of retaining a liquid, the film comprising:
- a first barrier layer to a gas;
- a second barrier layer to the gas;
- and
- at least one additional layer of material disposed interstitially between the first barrier layer and the second barrier layer.
A liner that resists formation of stress-induced breaches, comprising a film having an interface, a first innermost layer, a second innermost layer, a first interstitial layer, a second interstitial layer, a first barrier layer, a second barrier layer, a third interstitial layer, a fourth interstitial layer, a first cladding layer and a second cladding layer, wherein:
- the first and second innermost layers contact one another to define the interface;
- the first interstitial layer is disposed between the first innermost layer and the first barrier layer and the first barrier layer is disposed between the first interstitial layer and the third interstitial layer;
- the first cladding layer is disposed on the exterior of the third interstitial layer;
- the second interstitial layer is disposed between the second innermost layer and the second barrier layer and the second barrier layer is disposed between the second interstitial layer and the fourth interstitial layer;
- and
- the second cladding layer is disposed on the exterior of the fourth interstitial layer.
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A method of manufacturing a liner that resists formation of stress-induced breaches, comprising:
- co-extruding a tubular structure including a wall having a plurality of layers, the wall including an innermost layer of the plurality of layers and a barrier layer surrounding the innermost layer, the barrier layer providing a barrier to a gas;
- collapsing the tubular structure so that the innermost layer contacts itself at an interface to define a sheet material having a mirror image of the plurality of layers about the interface, the sheet material providing two innermost layers captured between two barrier layers;
- and
- forming the sheet material into a liner capable of retaining a liquid.
Dependencies are inferred from the claim text.