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Barrier-property lapped polymer film packaging material

A polymer film and packaging material technology, which is applied in packaging, wrapping paper, flexible coverings, etc., can solve the problems that the performance of co-extrusion films cannot be continuously improved, the number of construction layers is high, and the number of layers of co-extrusion films is limited.

Active Publication Date: 2011-04-06
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Co-extrusion casting dies are relatively simpler than co-extrusion blow molding dies, but it is still very difficult to build high-layer dies
As a result, the number of layers of the co-extruded film is very limited, resulting in the inability to continue to improve the performance of the co-extruded film

Method used

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  • Barrier-property lapped polymer film packaging material
  • Barrier-property lapped polymer film packaging material
  • Barrier-property lapped polymer film packaging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, the packaging film comprises only one repeat unit of a layer multiplied extruded composite barrier layer comprising only three individual layers, of which only one barrier polymer is composed. In repeating units, one individual layer corresponds to a barrier polymer composition A of extrusion grade ethylene-vinyl alcohol copolymer (EVOH), and one individual layer corresponds to a non-barrier polymer composition B of 95 wt% low density polyethylene and 5wt% maleic anhydride-modified low-density polyethylene blend (LDPE+maLDPE), one individual layer corresponds to non-barrier polymer composition C is ethylene-acrylic acid copolymer (EAA), and the repeating unit structure is B / A / C.

[0050] Three single-screw extruders provide molten material flow to a three-channel feed head, and the initial layered material flow with a repeating unit structure passes through eight double-layer multipliers connected in series from end to end. The total number of layers o...

Embodiment 2

[0053] In this example, only one layer multiplied extruded barrier composite layer is included in the packaging film material, where the repeat unit has four individual layers, but only three polymer compositions with only one barrier composition. One barrier individual layer corresponds to polymer composition A of 5 wt% nanoclay-filled nylon 6, and the two non-barrier individual layers correspond to polymer composition B of 97 wt% polypropylene and 3 wt% maleic anhydride-modified polypropylene The mixture of a non-barrier individual layer corresponds to a polymer composition C of metallocene low-density polyethylene, and a repeating unit structure of C / B / A / B.

[0054]Three single-screw extruders and a two-way splitter provide molten material flow to a four-channel feed head, and the initial layered material flow with repeating unit structure passes through 7 double-layer multipliers in series. The total number of composite barrier layers The number of layers is 512; finally, ...

Embodiment 3

[0056] In this example, only one layer multiplied extruded barrier composite layer was included in the packaging film, where the repeat unit had five individual layers, but only three polymer compositions and only one barrier composition among them. Among the five individual layers, the barrier polymer composition A corresponding to one barrier individual layer is polyvinylidene chloride (PVDC), and the non-barrier polymer composition B corresponding to the two non-barrier individual layers is polyester polyurethane, The non-barrier polymer composition corresponding to the two non-barrier individual layers C is a biopolyester hydroxybutyrate-hydroxyvalerate copolymer (PHBV), which is laminated into repeating units in a C / B / A / B / C structure .

[0057] Three single-screw extruders and two bidirectional splitters provide molten streams to a five-channel feed head, and the initial stacked streams with repeating unit structures pass through 7 double-layer multipliers in series, and ...

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Abstract

The invention discloses a barrier-property lapped polymer film packaging material comprising at least one layer-multiplied and coextruded lapped barrier compound layer. Each barrier compound layer comprises a plurality of repeating units which comprise at least two individual layers; each individual layer corresponds to one of two different polymers; at least one repeating unit of the lapped barrier compound layer at least comprises three individual layers; each of the individual layers corresponds to one of three different polymers; and at least one of the at least three polymers forms at least one barrier-property polymer part which can separate gas.

Description

technical field [0001] The present invention relates to a laminated polymeric film material structure for barrier packaging. Background technique [0002] In modern society, people have higher and higher requirements for food, beverages, cosmetics, pharmaceutical products, tea, chemical reagents, pesticides, spices, feed and other products to ensure quality, freshness, flavor and shelf life. Therefore, the demand for barrier packaging materials is also increasing. The development and research of new, high-performance, and low-cost barrier packaging materials, especially plastic films for barrier flexible packaging, has become a hot spot in the development of countries. However, most of the barrier packaging film materials produced in China have low performance and are generally used in the packaging of low-end products, while barrier packaging materials with excellent performance still need to be imported in large quantities. [0003] As a processing method of plastic compo...

Claims

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Application Information

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IPC IPC(8): B65D65/40B32B27/18B29C47/06
Inventor 翁文桂周纯
Owner 厦门天策材料科技有限公司
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