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Fresh-keeping packaging bag, and preparation method thereof and application thereof

A technology of packaging bags and fresh-keeping film, which is applied in the field of fresh-keeping packaging bags, can solve problems such as high energy consumption and complicated fresh-keeping process, and achieve the effects of improving quality, reducing bacterial growth, and extending shelf life

Active Publication Date: 2019-02-26
浙江舟山群岛新区紫气东来智能包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a fresh-keeping packaging bag, its preparation method and its application, so as to solve the problems of high energy consumption and complicated fresh-keeping process caused by the low-temperature fresh-keeping method in the prior art

Method used

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  • Fresh-keeping packaging bag, and preparation method thereof and application thereof
  • Fresh-keeping packaging bag, and preparation method thereof and application thereof

Examples

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preparation example Construction

[0025] In a typical embodiment, the present application also provides a method for preparing a fresh-keeping packaging bag, which includes the following steps: S1, first prepare a polylactic acid film; S2, arrange poly(caprolactone) on the prepared polylactic acid film An ester film, wherein the polycaprolactone film includes a polycaprolactone base film and a 1-MCP release agent dispersed in the polycaprolactone base film; and then forms any one of the above fresh-keeping packaging bags.

[0026] The preparation method of the fresh-keeping packaging bag provided in the present application has a simple process flow, and the fresh-keeping of fruits and vegetables at room temperature can be realized only by using the fresh-keeping packaging bag. It avoids a series of cumbersome fresh-keeping processes such as low-temperature refrigeration, controlled-atmosphere preservation and dipping treatment for fruits and vegetables in conventional fresh-keeping technologies.

[0027] In a ...

Embodiment 1

[0038] Set the temperature of the extrusion section on the casting equipment to 170°C, the die temperature to 230°C, and the cooling roll temperature to 25°C to prepare a polylactic acid film with a thickness of 15 μm and a width of 50 cm; then set the extrusion coating The temperature of the screw extrusion section of the equipment is 70°C, the die opening temperature is 90°C, and the cooling roll temperature is 20°C, and a layer of polycaprolactone film with a thickness of 5 μm is extruded on the polylactic acid film. Then on the dry composite production line, the polycaprolactone / polylactic acid film produced above is installed on the first unwinding position, and the polycaprolactone film side of the composite film is kept facing up, and the temperature of the setting pressure roller is 70°C, set the unwinding line speed to 50 m / min, spray commercially available 1-MCP / cyclodextrin powder on the film before the film passes through the pressing roller, the spraying rate is 1....

Embodiment 2

[0040] The difference from Example 1 is that the temperature of the extrusion section of the casting equipment is 230° C., the temperature of the cooling roll is 35° C., and the thickness of the prepared polylactic acid film is 25 μm. The temperature of the extrusion section of the extrusion coating equipment was 90° C., the temperature of the cooling roll was 25° C., and the thickness of the prepared polycaprolactone film was 2 μm. The unwinding line speed was 70 m / min, and the spray rate of 1-MCP / cyclodextrin powder was 0.035 g / min (1-MCP accounted for 0.001% of the polycaprolactone film).

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Abstract

The invention provides a fresh-keeping packaging bag, and a preparation method thereof and application thereof. The fresh-keeping packaging bag comprises an outer layer and an inner layer which are stacked together, wherein the outer layer is a polylactic acid film; the inner layer is a polycaprolactone film; and the polycaprolactone film comprises a polycaprolactone base film and a 1-MCP releasing agent dispersed in the polycaprolactone base film. The fresh-keeping packaging bag provided by the invention avoids energy-consuming and cumbersome fresh-keeping process flow and can keep fruits andvegetables fresh at normal temperature. For respiration climacteric fruits and vegetables with short natural preservation periods, the fresh-keeping packaging bag can keep the respiration climactericfruits and vegetables fresh for 4 to 6 days at room temperature and allows the decay rate of the fruits and vegetables to be less than 10%. The preserved fruits and vegetables have good appearance and have almost the same taste as the taste of the fruits and vegetables when freshly picked.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a fresh-keeping packaging bag, its preparation method and its application. Background technique [0002] Fresh fruits and vegetables continue to respire after being picked, oxidize nutrients, produce water, carbon dioxide, ethylene and other metabolites, and release heat; in a normal temperature environment, fruits and vegetables have a stronger respiration rate, and are more likely to age, lose water and lose water. commercial value. Ordinary fresh-keeping bags are difficult to meet the requirements of keeping fruits and vegetables fresh at room temperature. This is because the ethylene, carbon dioxide and moisture produced by the respiration of fruits and vegetables in ordinary fresh-keeping bags cannot be discharged to the outside in time, and they will be enriched in the fresh-keeping bags. The metabolite ethylene will accelerate the respiration rate of fruits and vegetabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L67/04C08K9/12C08K5/01
CPCC08J2367/04C08J2467/04C08K9/12C08K5/01C08J7/0427
Inventor 李伯涵
Owner 浙江舟山群岛新区紫气东来智能包装材料有限公司
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