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Laminated material without metal foil for blocking package

A technology of packaging materials and laminated materials, which is applied in the field of laminated materials without metal foil, can solve the problems that the performance of co-extruded films cannot be continuously improved, the number of layers of co-extruded films is limited, and the number of construction layers is high, so as to facilitate processing and reduce The effect of dosage and rich structure

Active Publication Date: 2014-01-15
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

The co-extrusion casting die is relatively simpler than the co-extrusion blow molding die, but it is still very difficult to build a high-layer die
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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  • Laminated material without metal foil for blocking package
  • Laminated material without metal foil for blocking package
  • Laminated material without metal foil for blocking package

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]In this embodiment, the overall structure of the packaging material is outer layer / substrate layer / barrier layer, wherein the outer layer is low-density polyethylene, the substrate layer is cardboard, and the barrier layer is composed of only three polymers and repeated The unit is a composite layer of layer multiplication extrusion of five layers. Wherein the non-barrier polymer composition A in the barrier composite layer is low-density polyethylene, and the non-barrier polymer composition B is maleic anhydride modified low-density polyethylene. The barrier polymer composition C is modified melt-processable polyvinyl alcohol.

[0052] First, cast low-density polyethylene on a thick cardboard (paper weight is about 400g / m2) at about 325°C 2 ) with a printed layer on the outer surface, the coating thickness is about 20 microns.

[0053] A barrier composite extruded by the layer doubling method was coextruded on the inner surface of a coated low density polyethylene lam...

Embodiment 2

[0056] In this example, the overall structure of the packaging material is outer layer / substrate layer / barrier layer, wherein the outer layer is low-density polyethylene (LDPE), the substrate layer is tissue paper, and the barrier layer component is composed of three polymers A layer multiplied extruded composite layer consisting of four layers with repeating units. Wherein the non-barrier polymer composition A in the barrier composite layer is ethylene acrylic acid copolymer (EAA), and the non-barrier polymer composition B is a copolymer of 95wt% low density polyethylene and 5wt% maleic anhydride modified low density polyethylene Blend, barrier polymer composition C is extrusion grade ethylene-vinyl alcohol copolymer (EVOH) and commercial grade nanoclay filled nylon 6.

[0057] First, at about 325°C, cast low-density polyethylene on a thick cardboard (paper weight is about 150g / m 2 ) with a printed layer on the outer surface, the coating thickness is about 20 microns.

[00...

Embodiment 3

[0061] In this embodiment, the overall structure of the packaging material is outer layer / substrate layer / barrier layer / inner layer, wherein the outer layer is linear low density polyethylene (LLDPE), the substrate layer is cardboard, and the barrier layer component is composed of The composite layer is composed of three polymers and the repeating unit is three layers, and the inner layer is LLDPE filled with nano-calcium carbonate. Wherein the non-barrier component A in the barrier composite layer is ethylene-vinyl acetate copolymer (EVA), and the non-barrier component B is a blend of 95wt% low-density polyethylene and 5wt% maleic anhydride-modified low-density polyethylene , The barrier polymer composition C is a blend of extrusion-grade polyvinyl alcohol copolymer (PVA) and MXD6 nylon.

[0062] Firstly, linear low density polyethylene is cast-coated on thick cardboard (paper weight is about 320g / m2) at about 350°C. 2 ) with a printed layer on the outer surface, the coating...

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Abstract

The invention discloses a laminated material without metal foil for a blocking package. The material at least comprises a substrate layer assembly and a composite blocking layer assembly, wherein the substrate layer assembly and the composite blocking layer assembly are laminated together; the substrate layer assembly has the effect of supporting; and the composite blocking layer assembly comprises at least one composite blocking layer which is prepared through a partition-laminated confluence layer multiplication and coextrusion method and comprises a plurality of repeated units. The material is characterized in that each repeated unit at least comprises three polymer constitutes, and each polymer constitute can form an individual layer or more than one individual layer; and only one of the polymer constitutes is a blocking polymer constitute which can block gas.

Description

technical field [0001] The present invention relates to a metal foil-free laminate for barrier packaging. Background technique [0002] In modern social life, the requirements for freshness, quality, flavor and shelf life extension of various food, pharmaceutical products and daily necessities are getting higher and higher. Therefore, barrier packaging materials have become a hot spot in the development of countries. [0003] The more common barrier packaging materials are a type of laminated structure obtained by laminating various layers of materials, and include a layer of fibrous material such as paper as a structural material, and its two sides are covered with heat-sealable plastic layers. In the case of high-barrier packaging, the packaging material includes a layer of gas-barrier and oxygen-barrier material, usually aluminum foil laminated on the fibrous material through a layer of heat-sealable plastic or adhesive, and at the same time it is directly bonded to the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/40B32B27/06
Inventor 翁文桂周纯
Owner 厦门天策材料科技有限公司
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