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Composite plastic sheet material for liquid food packaging

A technology for compounding plastic and liquid food, applied in the field of packaging materials, can solve the problems of instability of liquid food packaging materials, and achieve the effects of inhibiting the tendency of oxidation reaction, low production cost, and strong process controllability

Inactive Publication Date: 2018-11-06
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the unstable problem of the currently widely used liquid food packaging materials, the present invention proposes a composite plastic sheet for liquid food packaging

Method used

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  • Composite plastic sheet material for liquid food packaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composite plastic sheet structure is as follows:

[0028] The composite plastic sheet is made of the uppermost layer, the middle layer and the lowermost layer through hot pressing.

[0029] The uppermost layer is the base layer of biaxially oriented polypropylene film, and the stretching ratio is 4 times;

[0030] The middle layer is a polyvinylidene chloride barrier layer, which is composed of a polyvinylidene chloride layer and a black inner backing film with high-efficiency shading; the black inner backing film with high-efficiency shading is polyethylene terephthalate shading Black film;

[0031] The bottom layer is a low-density polyethylene heat-sealing layer, which is formed by dispersing microcapsules of chitosan-wrapped L-ascorbic acid in low-density polyethylene; in the microcapsules of chitosan-wrapped L-ascorbic acid, 19 parts by weight of chitosan , 81 parts by weight of L-ascorbic acid. The chitosan-wrapped microcapsules of L-ascorbic acid are dispe...

Embodiment 2

[0040] The composite plastic sheet structure is as follows:

[0041] The composite plastic sheet is made of the uppermost layer, the middle layer and the lowermost layer through hot pressing.

[0042] The uppermost layer is the base layer of biaxially oriented polypropylene film, and the stretching ratio is 3 times;

[0043] The middle layer is a polyvinylidene chloride barrier layer, which is composed of a polyvinylidene chloride layer and a black inner backing film with high-efficiency light-shielding; the black inner backing film with high-efficiency light-shielding is polyethylene terephthalate light-shielding Black film;

[0044] The bottom layer is a low-density polyethylene heat-sealing layer, which is formed by dispersing microcapsules of chitosan-wrapped L-ascorbic acid in low-density polyethylene; in the microcapsules of chitosan-wrapped L-ascorbic acid, 15 parts by weight of chitosan , 85 parts by weight of L-ascorbic acid. The chitosan-wrapped microcapsules of L-a...

Embodiment 3

[0053] The composite plastic sheet structure is as follows:

[0054] The composite plastic sheet is made of the uppermost layer, the middle layer and the lowermost layer through hot pressing.

[0055] The uppermost layer is the base layer of biaxially oriented polypropylene film, and the stretching ratio is 6 times;

[0056] The middle layer is a polyvinylidene chloride barrier layer, which is composed of a polyvinylidene chloride layer and a black inner backing film with high-efficiency light-shielding; the black inner backing film with high-efficiency light-shielding is polyethylene terephthalate light-shielding Black film;

[0057] The bottom layer is a low-density polyethylene heat-sealing layer, which is formed by dispersing microcapsules of chitosan-wrapped L-ascorbic acid in low-density polyethylene; in the microcapsules of chitosan-wrapped L-ascorbic acid, 22 parts by weight of chitosan , 78 parts by weight of L-ascorbic acid. The chitosan-wrapped microcapsules of L...

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Abstract

The invention provides a composite plastic sheet material for liquid food packaging, which is formed by a top layer, a middle layer, and a bottom layer through hot press lamination. The top layer is abi-oriented polypropylene thin film base layer; the middle layer is a polyvinylidene chloride barrier layer, which is formed by laminating a polyvinylidene chloride layer and a black lining bottom film having high-effectively shade effect; the bottom layer is a low-density polyethylene hot-seal layer, which is formed by dispersing chitosan-coated L-ascorbic acid microcapsules in low-density polyethylene. By laminating the black lining bottom film having high-effectively shade effect and dispersing the chitosan-coated L-ascorbic acid microcapsules the hot-seal layer, the L-ascorbic acid is slowly released and is not liable to be oxidized, so that soybean sauce packed with the material is significantly improved in color stability, and reduction range of red index is effectively controlled.The preparation method is simple, has excellent controllability, is low in production cost, and can be promoted in industrial production and application.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to the preparation of composite plastic packaging materials, in particular to a composite plastic sheet for liquid food packaging. Background technique [0002] On the basis of the development of the packaging industry, the packaging of articles has also been developed accordingly. From simple paper packaging, to single-layer plastic film packaging, to the widespread use of composite materials. Composite materials are two or more materials that are combined through one or more composite processes to form composite materials with certain functions. Generally, it can be divided into base layer, functional layer and heat sealing layer. The base layer mainly plays the role of aesthetics, printing, and moisture resistance. At present, the commonly used composite film can make the contents of the package have the characteristics of moisturizing, fragrance preservation, appearance, fr...

Claims

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Application Information

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IPC IPC(8): B32B3/08B32B27/08B32B27/18B32B27/30B32B27/32B32B27/36B32B33/00
CPCB32B27/08B32B3/08B32B27/18B32B27/304B32B27/32B32B27/36B32B33/00B32B2250/03B32B2250/24B32B2307/714B32B2439/70
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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