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Composite film for candy packaging and preparation method thereof

A composite film and candy technology, used in packaging, wrapping paper, transportation and packaging, etc., can solve problems such as difficulty in stably satisfying instant heat sealing, difficulty in imparting stiffness to candy packaging, and poor flatness due to PE film.

Inactive Publication Date: 2012-02-15
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve the low-temperature heat-sealing effect of the traditional candy packaging film, polyethylene (PE) material is usually used as the inner layer, and the packaging film is obtained by compounding the PE film and the stretch printing film. However, the use of PE film as the heat-sealing layer has the following problems : First of all, PE film and stretch printing film are easy to curl, and the film blowing process of PE film makes the flatness poor, and it is difficult to meet the requirements of instant heat sealing stably; in addition, the stiffness of PE film is low, it is difficult to give candy packaging good stiffness

Method used

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  • Composite film for candy packaging and preparation method thereof
  • Composite film for candy packaging and preparation method thereof
  • Composite film for candy packaging and preparation method thereof

Examples

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preparation example Construction

[0033] Correspondingly, the present invention also provides a preparation method of the above-mentioned candy packaging composite film, comprising the following steps:

[0034]a. Extrude the outer layer resin, the core layer resin and the inner layer resin at 210°C to 250°C, then cast, cool and shape the film to obtain a film including the outer layer, core layer and inner layer in sequence, and the outer layer of the film Corona treatment is carried out to obtain a cast polypropylene film including a corona layer, a core layer and an inner layer in sequence; the inner layer resin includes: 97wt% to 99wt% metallocene terpolymer polypropylene and 1wt% to 3wt% opening agent;

[0035] B, carrying out plasma surface treatment to the corona layer of the cast polypropylene film, and vacuum aluminum plating to obtain the aluminum-coated cast polypropylene film;

[0036] c. Composite the polyethylene terephthalate film and the aluminized cast polypropylene film by a dry compounding m...

Embodiment 1

[0051] 1. Add the outer layer resin raw material, middle layer resin raw material and inner layer resin raw material respectively to the three barrels of the co-extrusion machine. The resin raw material formula of each layer is listed in Table 1;

[0052] The raw materials in the three barrels are co-extruded and then enter the casting station to cool and shape. Temperature: 245° C.; the surface temperature of the casting roll is set at 30° C. in the casting process. Air knife clearance: 1.2mm; air knife speed: 50%; vacuum box wind speed: 35%; air knife pressure: 5.2mbar; vacuum box pressure: 1.2mbar.

[0053] Carry out corona treatment on the outer surface of the cast film after corona treatment, set the corona treatment power to 8.5KW, and the corona roller pressure to 3bar. After corona treatment, a paper packaging CPP film is obtained. The thickness ratio of the halo layer, the middle layer and the inner layer is 5:18:7.

[0054] 2. Place the CPP film prepared in step 1 ...

Embodiment 2～ Embodiment 4

[0058] The preparation process of the composite film for candy packaging in the above-mentioned embodiment is the same as that in Example 1. The raw material formula of the VMCPP film is listed in Table 1, and the process parameters are listed in Table 2.

[0059] The thickness of the PET film prepared by the above two examples is 12 μm, the thickness of the CPP film is 30 μm, and the thickness of the aluminum-coated layer is 400 angstroms;

[0060] Wherein, the thickness ratio of the film outer layer, middle layer and inner layer of the CPP film prepared in embodiment 2 is 5: 17.5: 7.5;

[0061] The thickness ratio of the film outer layer of the CPP film that embodiment 3 prepares, middle layer and inner layer is 5: 19: 6;

[0062] The thickness ratio of the film outer layer, middle layer and inner layer of the CPP film prepared in Example 4 is 5:18:7.

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Abstract

The invention provides a composite film for candy packaging and a preparation method thereof. The composite film for candy packaging successively comprises a polyethylene glycol terephthalate layer and an aluminizing casting polypropylene layer, wherein, the aluminizing casting polypropylene layer successively comprises an aluminized layer and a casting polypropylene (CPP) layer, the CPP layer successively comprises a corona layer, a core layer and an internal layer, and the internal layer comprises 97-99 wt% of metallocene polypropylene terpolymer and 1-3 wt% of opening agent. The composite film for candy packaging provided herein can lower heat-sealing temperature of the packaging film and simultaneously guarantee heat-sealing intensity, so as to satisfy the requirements of a high speed packaging machine for heat-sealing, and improves the packaging efficiency.

Description

technical field [0001] The invention relates to the field of food packaging, in particular to a candy packaging composite film and a preparation method thereof. Background technique [0002] Candy is a food that is widely loved by people. At present, the global per capita consumption of candy is about 3 kilograms, while that in my country is only about 0.7 kilograms. Therefore, the candy market in our country has great potential for development. After the candy is packaged, it needs to be packaged. The candy packaging can maintain the original luster, fragrance and shape of the candy for a long time, thereby prolonging the shelf life; the candy packaging can also prevent microbial dust and pollution, and improve the hygiene and safety of the product; in addition, the exquisite Candy packaging can also increase consumers' desire to buy and product value. Therefore, candy packaging plays an important role in the circulation of candy commodities. [0003] At present, the pac...

Claims

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Application Information

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IPC IPC(8): B32B15/085B32B15/20B32B27/08B32B27/16B32B27/18B32B27/32B65D65/40
Inventor 张和平陈旭
Owner HUANGSHAN NOVEL
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