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Recyclable polyolefin metallized composite film and preparation method thereof

A metallized film and polyolefin technology, applied in the field of flexible packaging, can solve problems such as poor compatibility, large differences in film materials, and inability to recycle and reuse, and achieve the effect of reducing the cost of use and reducing the impact on the environment

Pending Publication Date: 2019-04-19
NANJING HUJIANG COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional metallized composite film used for heavy bags has large differences in the materials of each film layer and poor compatibility. It cannot be regarded as a single material and cannot be recycled and reused.

Method used

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  • Recyclable polyolefin metallized composite film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1). Add 100kg of resin B and 25kg of resin A to the outer hopper, add 50kg of resin B and 75kg of resin A to the middle hopper, add 100kg of resin B and 25kg of resin A to the inner hopper; mix After uniformity, it is extruded by three screw extruders (screw diameter φ=60mm, length-to-diameter ratio is 30, working temperature is 180-190℃), and the outer, middle and inner three layers are co-extruded and blown on the die. Tube film. Among them, the thickness ratio of the outer, middle, and inner layers of the film is 1:1:1; the resin A brand is RB707CF, and the resin B brand is 1018CA.

[0039] 2). After the production of the polyolefin substrate film layer is completed, corona treatment is carried out on the inner layer 3 of the substrate film, the corona current is 4 amperes, and the dyne water with a dyne value of 42 will not shrink for 2 seconds. ; Then sent to the vacuum aluminum plating machine to process the aluminum coating, the coiling speed is 300m / min; the alumi...

Embodiment 2

[0042] 1). Add 70kg of resin B and 30kg of resin A in the outer hopper, 60kg of resin B and 40kg of resin A in the middle hopper, and 75kg of resin B and 25kg of resin A in the inner hopper; mix After uniformity, it is extruded by three screw extruders (screw diameter φ=60mm, length-to-diameter ratio is 30, working temperature is 180-190℃), and the outer, middle and inner three layers are co-extruded and blown on the die. Tube film. Among them, the thickness ratio of the outer, middle, and inner layers of the film is 1:1:1; the resin A brand is RB707CF, and the resin B brand is 1018CA.

[0043] 2). After the production of the polyolefin substrate film layer is completed, corona treatment is carried out on the inner layer 3 of the substrate film, the corona current is 4 amperes, and the dyne water with a dyne value of 42 will not shrink for 2 seconds. ; Then sent to the vacuum aluminum plating machine to process the aluminum coating, the coiling speed is 350m / min; the aluminum fe...

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Abstract

The invention discloses a recyclable polyolefin metallized composite film and a preparation method thereof. The film includes a polyolefin metallized film layer and a polyethylene film layer; a base membrane of the polyolefin metallized film is prepared from polyolefin through blow molding by a up-blowing method, and a three-layer co-extrusion blow molding process is adopted. A metal surface of the polyolefin metallized film layer is compounded with a corona surface of the polyethylene film layer through an adhesive. The barrier performance, mechanical properties and other indexes of heavy-bagproducts prepared by the film are on a par with these of existing traditional metallized composite film heavy bags, after the used products enter a recycling system, plastic recycling can be performed according to the single-component metallized film, the defect is avoided that a traditional metallized composite film cannot be recycled due to different components of film-layer materials, the manufacture cost of the product is reduced, the influence of the film on the environment is reduced, and the environmentally friendly requirement is met.

Description

Technical field [0001] The invention relates to the technical field of flexible packaging, and in particular to a recyclable polyolefin metallized composite film and a preparation method thereof. Background technique [0002] Metalized film is a commonly used barrier film in the field of flexible packaging. It has the characteristics of both plastic film and metal. It is a cheap and beautiful packaging material with excellent performance and practicality. It is often used for its excellent cost performance. Replace metal films (such as aluminum foil) in the field of metallized composite films. The metallized composite film is based on the metallized film, and then combined with films of other materials to form a composite film to achieve performance that cannot be achieved by a single-layer metalized film. Traditional metallized composite films generally use CPP aluminum film, OPP aluminum film or PET aluminum film as the metallized film layer, and then compound PET, PA, PP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B33/00
CPCB32B27/08B32B27/32B32B33/00B32B2255/205B32B2255/10B32B2307/50B32B2307/724B32B7/12B65D65/40Y02W30/80
Inventor 章育骏章澄
Owner NANJING HUJIANG COMPOSITE MATERIALS
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