Multilayer Film Having Passive and Active Oxygen Barrier Layers
a multi-layer film and oxygen barrier technology, applied in the direction of packaging foodstuffs, containers preventing decay, packaging goods, etc., can solve the problems of significantly reducing the unsatisfactory film performance, etc., to prolong the useful shelf life of the film, reduce or deplete the capacity of the scavenging moiety to bind with oxygen, and reduce the effect of oxygen barrier properties of the active barrier layer
Inactive Publication Date: 2014-10-23
CRYOVAC ILLC
View PDF4 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The multilayer film design significantly reduces oxygen transmission rates, extending the shelf life of packaged products by maintaining effective oxygen barrier properties beyond the depletion of the oxygen scavenging capacity, with oxygen transmission rates less than half that of conventional films.
Problems solved by technology
This may result in the oxygen barrier properties of the active barrier layer being significantly reduced.
As a result, depletion of the capacity of the oxygen scavenging layer may cause the film to perform unsatisfactorily.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
examples
[0119]Multilayer films used in the following examples were prepared via cast coextrusion. Films have a total thickness of about 6 mils. Unless otherwise indicated all percentages are weight percentages. The materials used in the examples are identified below.
[0120]LLDPE-1: EXCEED™ 4518PA; an ethylene hexene-1 copolymer, produced by single site catalysis, with a melt index of 4.5 g / 10 min (ASTM D-1238) and a density of 0.918 g / cc (ASTM D-1505); purchased from Exxon Mobil of Houston, Tex.
[0121]LLDPE-2: Dow-Corning MB50-313™, a linear low density polyethylene containing 50% polydimethylsiloxane slip additive. It has a density of 0.94 g / cc.
[0122]LDPE-1: LD102.74™ is a low density polyethylene containing slip, antioxidants and antiblock additives with a density of 0.920 g / cc and a melting point of 110° C., obtained from Exxon Mobil of Houston, Tex.
[0123]LDPE-2: FSU 93E™ is a low density polyethylene based masterbatch containing 9% diatomaceous earth silica and 3.0% erucamide with a melt ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| relative humidity | aaaaa | aaaaa |
| mole percent | aaaaa | aaaaa |
| mole percent | aaaaa | aaaaa |
Login to View More
Abstract
The present invention provides a multilayer film having an active oxygen barrier multilayer core comprising at least one of 1) an active oxygen barrier layer is sandwiched between two passive oxygen barrier layers, or 2) a passive oxygen barrier layer is sandwiched between two active oxygen barrier layers. In one embodiment, the active barrier layer comprises a composition that is a blend of a thermoplastic resin (A) having carbon-carbon double bonds substantially in its main chain, a transition metal salt (B), and an oxygen barrier polymer (C). In some embodiments the active barrier layer may also include a compatibilizer (D). The passive oxygen barrier layers help to maintain the oxygen barrier properties of the multilayer film after the oxygen absorbing capacity of the active barrier layer has been exhausted. As a result, the useful shelf life of the film can be extended.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of U.S. application Ser. No. 11 / 845,915, filed Aug. 28, 2007, which is hereby incorporated herein in its entirety by reference.FIELD OF THE INVENTION[0002]The present invention relates generally to a multilayer film having an active oxygen barrier layer with an oxygen scavenging moiety and more particularly to a multilayer film that maintains high oxygen barrier properties after the oxygen binding capacity of the oxygen scavenging moiety has been exhausted.BACKGROUND OF THE INVENTION[0003]Polymeric films are used in a wide variety of packaging applications, including food packaging, pharmaceutical products and non-perishable consumer goods. Films suitable for each of these applications are typically required to exhibit a range of physical properties. Food packaging films in particular may be required to meet numerous demanding performance criteria, depending on the specific application, such ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityApplications(United States)
IPC IPC(8): B65D81/26B65D65/22B32B27/08B32B27/34B32B27/18B29C47/06B32B27/30B29C48/21B32B1/00
CPCB65D81/267B29C47/065B65D65/22B32B27/08B32B27/306B32B27/34B32B27/18B32B27/304A23L3/3436B32B27/32B32B2270/00B32B2307/7244B32B2307/736B32B2439/70Y10T428/1383Y10T428/31909Y10T428/31757Y10T428/31504Y10T428/31855Y10T428/31743Y10T428/31928Y10T428/31924Y10T428/31728B29C48/21B65D65/40B65D77/00
InventorBECKWITH, SCOTTEDWARDS, FRANK BRYANRIVETT, JANETEBNER, CYNTHIA LOUISEKENNEDY, THOMASMCDOWELL, RACHELSPEER, DREW V.
OwnerCRYOVAC ILLC