Coextruded multilayer film with filler in transport layer

A multi-layer film, co-extrusion technology, applied in the field of MAP, can solve the problems of increasing film energy and cost

Active Publication Date: 2017-04-19
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although perforation (micro-perforation or mega-perforation) can increase the oxygen transmission into the product packaging, it requires additional processing steps and additional processing equipment, thus increasing the energy and cost of the film

Method used

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  • Coextruded multilayer film with filler in transport layer
  • Coextruded multilayer film with filler in transport layer
  • Coextruded multilayer film with filler in transport layer

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[0146] 1. Materials

[0147] The materials used for the multilayer films are provided in Table 2 below.

[0148] Table 2 - Materials

[0149]

[0150] 2. Multi-layer film generation

[0151] Such as figure 1 As shown in , A and B nanolayers were produced using extruders 3 and 4 and subsequent layer multipliers. figure 1 is a schematic showing the layout of seven extruders around a six-layer die comprising an encapsulated extruder, an encapsulated feedblock (EFB), a multilayer (LM) and a microlayer feedblock (MFB). Extruders 1, 2, 5 and 6 were used to add the skin. Extruders 1 and 2 produced the inner skin of the annular film structure and extruders 5 and 6 produced the monolithic film structure (i.e., skin from extruder 1 / skin from extruder 2 / [from extruder 3 and A and B nanolayers of 4] / skin layer from extruder 5 / skin layer from extruder 6).

[0152] The monolithic core assembly contained 108 layers and the monolithic multilayer film contained the core assembly, enca...

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Abstract

The present disclosure provides a coextruded multilayer film. The coextruded multilayer film includes a core component having from 10 to 1000 alternating layers of layer A and layer B. Layer A has a thickness from 30 nm to 1000 nm and includes a polymer selected from an ethylene / a-olefin copolymer, an ethylene vinyl acetate polymer (EVA), an ethylene methyl-acrylate copolymer (EMA), an ethylene n-butyl acetate polymer (EnBA), and combinations thereof. Layer B has a thickness from 30 nm to 1000 nm. Layer B is a blend composed of (i) a polymer selected from an ethylene-based polymer, an EVA, an EMA, an EnBA, and combinations thereof, and (ii) a particulate filler material. The core component has a water vapor transmission rate from 50 to less than 500 g-mil / m2 / 24 hr and a carbon dioxide transmission rate from 50,000 to 300,000 cc-mil / m2 / 24 hr / atm.

Description

Background technique [0001] The present invention relates to multilayer films having a core component comprising particulate filler material, said multilayer films being suitable for use in MAPs. [0002] Improving the quality and shelf life of fresh and fresh-cut produce has long been a goal of the food industry. Technologies such as modified atmosphere storage (CA), modified atmosphere packaging (MAP) and proven control technologies such as ethylene absorbers and ethylene antagonists (1-MCP) have been developed and selectively used to achieve extended product shelf-life and improved product quality. Understanding biological variability such as fruit type, diversity, maturity period, growing area and climate response is important when choosing the appropriate technology for packaging, storing and delivering products. [0003] Most products suffer significant damage from fungus and mold when the moisture content inside the packaging is too high and condensation occurs. Most...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/20B32B27/30B32B27/32
CPCB32B27/08B32B27/205B32B27/306B32B27/308B32B27/32B32B2307/724B32B2410/00B32B27/20B32B2439/70
Inventor B·A·门宁格R·L·麦吉P·C·D·李R·M·帕特尔
Owner DOW GLOBAL TECH LLC
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