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High-barrier high-strength composite packaging film and preparation method thereof

A composite packaging film, high-strength technology, applied in the direction of chemical instruments and methods, other household appliances, synthetic resin layered products, etc., can solve the problems of low yield, low production efficiency, and easy wrinkling of LDPE film, etc., to achieve The effect of low water absorption, excellent heat sealing performance, and excellent anti-barrier performance

Inactive Publication Date: 2018-12-14
JIANGYIN BAOBO PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the production efficiency is low, but also the LDPE film is softer than the BOPET layer, Al, PA, and the LDPE film is prone to wrinkle during the compounding process, resulting in low yield

Method used

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  • High-barrier high-strength composite packaging film and preparation method thereof
  • High-barrier high-strength composite packaging film and preparation method thereof
  • High-barrier high-strength composite packaging film and preparation method thereof

Examples

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Effect test

preparation example Construction

[0032] A method for preparing a high-barrier high-strength composite packaging film, comprising the steps of:

[0033] S1: Prepare each layer of film, prepare BOPET film and BOPA film by biaxial stretching process, prepare Al foil film by hot pressing forming process, and prepare PE film by blow molding process;

[0034] S2: Pattern printing, using a gravure printing process to print a pattern layer on the surface of one side of the BOPET film obtained in step S1;

[0035] S3: The third layer and the fourth layer are compounded, and the third layer and the fourth layer are compounded by using a dry compound machine; the dry compound process is: the BOPET film or BOPA film and PE film prepared in step S1, etc. Unwind at a high speed, corona treatment is performed on one side of the PE film, and one side of the BOPET film or BOPA film is evenly coated with water-resistant polyurethane glue, and the sizing amount is 2.0-4.0g / m 2 , the BOPET film or BOPA film coated with glue and...

Embodiment 1

[0039] A composite packaging film with a thickness of 111 μm was prepared by using the above-mentioned method for preparing a high-barrier and high-strength composite packaging film, in which the thickness of the first layer of BOPET film was 12 μm, the thickness of the second layer of Al foil film was 7 μm, and the thickness of the third layer of BOPET film was 13 μm, the thickness of the fourth layer of PE film is 75 μm, the thickness of the adhesive layer is 2 μm, the thickness of the ink layer is 2 μm, and the PE film is composed of 5% POE elastomer (toughener) and 4.5% tri[2, 4-di-tert-butylphenyl] phosphite (antioxidant), 0.5% oleic acid amide (slip agent) by weight, 60% linear low density polyethylene and weight ratio Composed of 30% low density polyethylene.

Embodiment 2

[0041] A composite packaging film with a thickness of 138 μm was prepared by using the above-mentioned method for preparing a high-barrier and high-strength composite packaging film, wherein the thickness of the first layer of BOPET film was 10 μm, the thickness of the second layer of Al foil film was 9 μm, and the thickness of the third layer of BOPET film was . 15 μm, the thickness of the fourth layer of PE film is 100 μm, the thickness of the adhesive layer is 2 μm, the thickness of the ink layer is 2 μm, and the PE film is composed of 8.7% EVA elastomer (toughener) and 3% four [β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (antioxidant), erucamide (slip agent) that is 0.3% by weight, and 30% by weight It consists of linear low density polyethylene and low density polyethylene with a weight ratio of 58%.

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Abstract

The invention discloses a high-barrier high-strength composite packaging film. The composite packaging film at least comprises a first layer, a second layer, a third layer and a fourth layer from exterior to interior, wherein the first layer is a BOPET film; the second layer is an Al foil film; the third layer is another BOPET film or a BOPA film; the fourth layer is a PE film; a patterned layer is arranged on the inner side surface of the first layer; and adhesive layers formed by curing of boiling-resistant polyurethane glue are respectively arranged between the first layer and the second layer, between the second layer and the third layer and between the third layer and the fourth layer. The packaging film of the invention has excellent barrier properties, puncture resistance and boiling resistance, good texture, excellent appearance and low cost. The preparation method for the composite packaging film provided by the invention is simple in process and convenient for industrialization and promotion, effectively reduces the wrinkle phenomenon in the compounding process and improves the yield of products.

Description

technical field [0001] The invention belongs to the technical field of packaging films, and specifically designs a high-barrier and high-strength composite packaging film and a preparation method thereof. Background technique [0002] In production, many products need to be packaged in packaging bags to facilitate storage, handling and transportation, etc., especially for granular and powdery materials, packaging bags are needed for packaging. However, in actual storage, handling or transportation, sometimes due to carelessness, the packaging bag is broken, or due to the limitation of the strength of the packaging bag, the number of stacked layers is limited, it should not be too high, and even when filling the packaging bag When feeding materials, because the punching speed is too fast, the packaging bag is directly broken, which affects the safe and smooth production. The packaging bag is made of heat-sealed packaging film, and the quality of the packaging film directly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B15/09B32B15/20B32B27/34B32B15/088B32B27/08B32B27/32B32B7/12B32B33/00
CPCB32B7/12B32B15/088B32B15/09B32B15/20B32B27/08B32B27/32B32B27/34B32B27/36B32B33/00B32B2307/4023B32B2307/584B32B2553/00
Inventor 陆锦霞黄文娟徐文法丁磊李学岱
Owner JIANGYIN BAOBO PACKING