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Coating method and system of coating film meeting requirements of sandwich food package and coated with PVDC (Polyvinyl Dichloride) emulsion on double faces

A food packaging and double-sided coating technology, applied in the field of coating systems, can solve the problems of film shrinkage and deformation, poor packaging and sealing, sandwich deformation, etc., and achieve the effect of improving adhesion and good uniformity

Active Publication Date: 2015-06-17
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in domestic sandwich packaging, most of them use single-layer BOPP film-wrapped packaging, and some use carton packaging. It is easy to be squeezed and deformed; and the carton package does not allow consumers to see the food inside the package, and the packaging is not well sealed, and the air is easy to pass through, making the shelf life of the sandwich shorter.
[0008] PVDC emulsion coating is carried out on the existing coating equipment. During the coating process, there is a slight sticking phenomenon between the roller and the film, which makes it difficult to control the tension and film movement during the coating process, resulting in the film After being heated in an oven, there is obvious shrinkage and deformation, and it is also difficult to control the amount of emulsion coating

Method used

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  • Coating method and system of coating film meeting requirements of sandwich food package and coated with PVDC (Polyvinyl Dichloride) emulsion on double faces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Unwinding process: Under a constant unwinding tension of 20N, the BOPP reel-shaped film with a thickness of 22 μm is flatly unwound into a continuous and stable operation;

[0032] 2. The first surface corona treatment process: the corona treatment power is set to 6.0kW, and the corona value of the treated base film reaches 41 dynes;

[0033] 3. The first side primer coating process: the solvent-based polyurethane adhesive is coated on the BOPP film through a metal chrome-plated anilox roller, and the glue amount of the adhesive on the film is 0.3g / m 2 , the coating thickness is 1μm, the number of metal anilox roller lines is 150 lines, and the machine running speed is controlled at 200m / min;

[0034] 4. The drying process of the first side primer: use hot air to dry, and then send it into the oven after the air is heated. The temperature is set at 100°C, and the drying time of the film in the oven is 1 second. The tension is set to 90N;

[0035] 5. The first surfa...

Embodiment 2

[0045] 1. Unwinding process: Under a constant unwinding tension of 30N, the BOPP reel-shaped film with a thickness of 28 μm is flatly unwound into a continuous and stable operation;

[0046] 2. The first surface corona treatment process: the corona treatment power is set to 6kW, and the corona value of the base film after treatment reaches 41 dynes;

[0047] 3. The first side primer coating process: the solvent-based polyurethane adhesive BOPP is coated on the film through a metal chrome-plated anilox roller, and the glue amount of the adhesive on the film is 0.4g / m 2 , the coating thickness is 1μm, the number of metal anilox roller lines is 200 lines, and the machine running speed is controlled at 200m / min;

[0048] 4. The drying process of the first side primer: use hot air to dry, and then send it into the oven after the air is heated. The temperature is set at 100°C, and the drying time of the film in the oven is 1 second. The tension is set to 90N;

[0049] 5. The first...

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Abstract

The invention provides a coating method of a coating film meeting requirements of a sandwich food package and coated with PVDC (Polyvinyl Dichloride) emulsion on double faces, and a coating system for implementing the method. Base coating and top coating all adopt a kiss-type coating manner; and a proper quantity of wax emulsion and a silicon dioxide anti-sticking agent are added into top coating oxygen-resisting PVDC emulsion in a first top coating procedure, and top coating heat-sealing PVDC emulsion in a second top coating procedure. Therefore, the coating film has the characteristics of high resistance and heat sealability, and can be compounded with a paper box through UV (Ultra Violet) glue; the surface of the coating film is smooth, and thus the coating film can easily move on equipment; when the thin film moves on the coating equipment, greater tension is not needed; and the thin film does not obviously contract and deform after being heated by an oven, and the performance of a product is not influenced.

Description

technical field [0001] The invention relates to a coating method of a double-sided coated PVDC emulsion coating film suitable for sandwich food packaging and a coating system for implementing the method. Background technique [0002] Sandwich belongs to fast food and is a typical Western food. Because it is easy to eat, it can be eaten after opening the package, and it is rich in nutrition. It is a very popular nutritional fast food in the West. In recent years, with the acceleration of the pace of life, many people in China choose this convenient sandwich as breakfast, work meals or food to carry with them when traveling. At present, in domestic sandwich packaging, most of them use single-layer BOPP film-wrapped packaging, and some use carton packaging. It is easy to be squeezed and deformed when it is used; and the carton package does not allow consumers to see the food inside the package, and the packaging is not well sealed, and air is easy to pass through, making the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C9/04B05C9/08B05C1/08B05C11/04B05D3/14B05D3/04B05D3/06C09D127/08C09D191/06C09D7/12
Inventor 杨强林鹏云大勇
Owner HAINAN SHINER IND
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