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Carbon dioxide-propylene oxide copolymer based paper-plastic composite film and preparation method thereof

A technology of propylene oxide and carbon dioxide is applied in the field of packaging materials, which can solve the problems of limited application scope, difficulty in recycling, and non-biodegradation of polypropylene.

Active Publication Date: 2020-11-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Paper-plastic composite materials include paper layer and plastic film layer, but at present, double-drawn polypropylene (BOPP) plastic film and paper are used for compounding. On the one hand, because polypropylene material has low polarity and paper cannot be directly compounded, an adhesive is required. For bonding BOPP film and paper, the adhesive uses organic solvents, causing environmental pollution, and the preparation process is not environmentally friendly; on the other hand, polypropylene is not biodegradable, and it is difficult to recycle and reuse after compounding with paper. The environmental impact is becoming more and more serious and has attracted widespread attention. Biodegradable materials can be decomposed by microorganisms after use and finally decomposed into carbon dioxide and water. Using biodegradable materials instead of existing non-degradable plastics is an effective way to fundamentally solve white pollution.
[0003] At present, most of the paper-plastic composites made of biodegradable materials are casted into films and directly composited with paper. Due to the lack of thermal stability of biodegradable materials, the processing temperature required to prepare paper-plastic composite films by casting methods is high. Biodegradable materials have been thermally degraded, which affects the performance of the material, and the temperature of the casting film is high when it is directly compounded with paper. The casting temperature exceeds 200°C, and the paper is prone to yellowing. In addition, this paper-plastic composite method cannot be used for printed matter. , which greatly limits its scope of application, especially for high-end paper-plastic composite applications

Method used

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  • Carbon dioxide-propylene oxide copolymer based paper-plastic composite film and preparation method thereof
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preparation example Construction

[0064] The present invention also provides a method for preparing the carbon dioxide-propylene oxide copolymer-based paper-plastic composite film described in the above technical solution, comprising the following steps:

[0065] a) the inner layer PPC base film layer modified material and the outer layer PPC base film layer modified material are melted and blown by double-layer blown film equipment to obtain a PPC composite film;

[0066] The modified material of the inner layer PPC base film layer is prepared in the following manner: after mixing PPC, PBAT and chain extender, melt granulation is carried out to obtain the modified material of the inner layer PPC base film layer;

[0067] The modified material of the outer PPC base film layer is obtained in the following manner: after mixing the PPC and slip agent, melt granulation is carried out to obtain the modified material of the outer PPC base film layer;

[0068] b) The paper and the PPC composite film are hot-pressed a...

Embodiment 1

[0087] 1.1 Raw material

[0088] Inner material:

[0089] 20 parts of PPC (molecular weight 150kg / mol, molecular weight distribution 2.8, catalyst residue 26ppm);

[0090] 80 parts of PBAT (molecular weight 50kg / mol, molecular weight distribution 2.2);

[0091] 0.2 parts of methyl acrylate-glycidyl methacrylate copolymer.

[0092] Outer material:

[0093] 99 parts of PPC (molecular weight 150kg / mol, molecular weight distribution 2.8, catalyst residue 26ppm);

[0094] Erucamide 1 part.

[0095] 1.2 Preparation

[0096] S1. Mix PPC, PBAT and chain extender in a mixer, and process through twin-screw melt granulation to obtain the modified material for the inner PPC base film layer.

[0097] S2. Mix the PPC and the smooth agent in a mixer, and process through twin-screw melting and granulation to obtain the modified material of the outer PPC base film layer.

[0098]In steps S1 and S2, the granulation temperature is: zone 1 142°C, zone 2 152°C, zone 3 160°C, zone 4 170°C, z...

Embodiment 2

[0104] 1.1 Raw material

[0105] Inner material:

[0106] 20 parts of PPC (molecular weight 150kg / mol, molecular weight distribution 2.8, catalyst residue 26ppm);

[0107] 80 parts of PBAT (molecular weight 50kg / mol, molecular weight distribution 2.2);

[0108] 0.2 parts of glycidyl methacrylate homopolymer.

[0109] Outer material:

[0110] 99 parts of PPC (molecular weight 150kg / mol, molecular weight distribution 2.8, catalyst residue 26ppm);

[0111] Erucamide 1 part.

[0112] 1.2 Preparation

[0113] S1. Mix PPC, PBAT and chain extender in a mixer, and process through twin-screw melt granulation to obtain the modified material for the inner PPC base film layer.

[0114] S2. Mix the PPC and the smooth agent in a mixer, and process through twin-screw melting and granulation to obtain the modified material of the outer PPC base film layer.

[0115] In steps S1 and S2, the granulation temperature is: zone 1 142°C, zone 2 152°C, zone 3 160°C, zone 4 170°C, zone 5 178°C, ...

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Abstract

The invention provides a carbon dioxide-propylene oxide copolymer based paper-plastic composite film and a preparation method thereof. In the paper-plastic composite film provided by the invention, the plastic film layer is a PPC composite film layer, the PPC composite film layer comprises an inner layer and an outer layer, and the inner layer is prepared from the following raw materials by weight: 15-25 parts of PPC, 75-85 parts of PBAT and 0.2-0.5 part of a chain extender; and the outer layer is prepared from the following raw materials by weight: 98-99.9 parts of PPC and 0.1-2 parts of a slipping agent. The specific components of the inner layer raw materials are matched, so that the inner layer raw materials can be directly compounded with paper at proper hot-pressing temperature and pressure, an adhesive is not needed, and a good binding force is obtained; the specific components of the outer layer raw materials are matched, so that the outer layer is not easily bonded with iron,and the PPC composite film and the paper can be directly subjected to hot-pressing compounding through hot-pressing roller equipment; and moreover, the outer layer raw materials and the inner layer raw materials have good matching property, so that the processability is improved, and the mechanical property of the composite film is improved.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a carbon dioxide-propylene oxide copolymer-based paper-plastic composite film and a preparation method thereof. Background technique [0002] Paper-plastic composite material has the characteristics of high strength, good waterproof, beautiful appearance, and can effectively protect printed matter. It is one of the most popular packaging materials and is widely used in brochures, advertising covers, business cards, books, etc. Paper-plastic composite materials include paper layer and plastic film layer, but at present, double-drawn polypropylene (BOPP) plastic film and paper are used for compounding. On the one hand, because polypropylene material has low polarity and paper cannot be directly compounded, an adhesive is required. For bonding BOPP film and paper, the adhesive uses organic solvents, causing environmental pollution, and the preparation process is not environmentall...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/10B32B27/36B32B29/00B32B37/06B32B37/10C08L67/02C08L69/00C08L33/08C08L33/14C08K5/20C08K5/098C08J5/18
CPCB32B27/08B32B27/10B32B27/365B32B27/36B32B29/002B32B37/06B32B37/10C08J5/18C08J2367/02C08J2469/00C08J2433/08C08J2433/14C08K5/098C08K5/20
Inventor 高凤翔董艳磊赵逊周庆海王献红
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI