Fresh-keeping bag for food and preparation method

A technology of fresh-keeping bags and food, applied in the directions of packaging food, chemical instruments and methods, bags, etc., can solve the problems of less emphasis on antibacterial and mildew-proof, difficult to explain, white pollution, etc., to achieve good application value, prevent bacteria, avoid The effect of security risks

Inactive Publication Date: 2017-07-07
合肥天沃能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing fresh-keeping film seldom pays attention to antibacterial and mildew-proof aspects, and the existing fresh-keeping bags are disposable, and as the usage increases, it will cause white pollution, which is difficult to explain. Fresh-keeping effect, and can prevent bacterial growth, and the easy-to-degrade plastic wrap is of great significance, and also meets the requirements of environmentally friendly materials

Method used

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  • Fresh-keeping bag for food and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 Shown, a kind of food fresh-keeping bag and preparation method of preferred embodiment of the present invention;

[0028] The fresh-keeping bag for food consists of a waterproof fresh-keeping layer 1, an adsorption layer 2 and a fresh-keeping inner layer 3 from outside to inside, the waterproof fresh-keeping layer 1 is a graphene-modified polylactic acid layer, and the adsorption layer 2 includes an elastic porous structure 21 and adsorption filler 22, the adsorption filler 22 is filled in the elastic porous structure 21, the fresh-keeping inner layer 3 is a polylactic acid film layer, the waterproof fresh-keeping layer 1 and the adsorption layer 2 and the adsorption layer 2 and the fresh-keeping inner layer 3 bonded by heat sealing.

[0029] The elastic porous structure is an EVA transparent foam layer or a polylactic acid foam layer, which on the one hand makes the adsorption filler evenly distributed, and on the other hand plays a certain role in buffe...

Embodiment 2

[0040] A kind of fresh-keeping bag for food according to the preferred embodiment of the present invention and its preparation method;

[0041]The fresh-keeping bag for food consists of a waterproof fresh-keeping layer, an adsorption layer and a fresh-keeping inner layer from the outside to the inside. The waterproof and fresh-keeping layer is a graphene-modified polylactic acid layer, and the adsorption layer includes an elastic porous structure and an adsorption filler. The adsorption filler is filled in the elastic porous structure, the fresh-keeping inner layer is a polylactic acid film layer, and the waterproof fresh-keeping layer and the adsorption layer and the adsorption layer and the fresh-keeping inner layer are bonded by heat sealing.

[0042] The elastic porous structure is an EVA transparent foam layer or a polylactic acid foam layer.

[0043] The adsorption filler is a mixture of attapulgite clay, activated carbon, shale diatomite and microporous calcium carbonat...

Embodiment 3

[0053] The structure of described food fresh-keeping bag is with embodiment 1, and difference is the preparation method of food fresh-keeping bag, specifically as follows:

[0054] The graphene-modified polylactic acid comprises the following components by weight: 80 parts of linear polylactic acid, 5 parts of graphene, 8 parts of maleic anhydride, 10 parts of butanediol, 7 parts of xylitol, sebacic acid di 9 parts of butyl ester.

[0055] The preparation method of the fresh-keeping bag for food of the present invention comprises the following steps:

[0056] (1) Preparation of graphene-modified polylactic acid layer: Weigh linear polylactic acid, graphene, maleic anhydride, butanediol, xylitol, and dibutyl sebacate into the reaction kettle according to the ratio. Raise the temperature to 200°C, blend for 2 hours, and blow molding to prepare a graphene-modified polylactic acid film layer;

[0057] (2) Preparation of modified attapulgite clay: Take the natural attapulgite cla...

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Abstract

The invention discloses a fresh-keeping bag for food and a preparation method. The fresh-keeping bag is provided with a waterproof and fresh-keeping layer, an adsorption layer and a fresh-keeping inner layer in turn from outside to inside. The waterproof and fresh-keeping layer is the graphene modified polylactic acid layer. The adsorption layer comprises an elastic porous structure and adsorption fillers, wherein the adsorption fillers are filled in the elastic porous structure. The fresh-keeping inner layer is the polylactic acid film layer. The waterproof and fresh-keeping layer and the adsorption layer as well as the adsorption layer and the fresh-keeping inner layer are bonded through thermal seal. The preparation methods comprises the steps that the graphene modified polylactic acid layer is prepared firstly; then modified attapulgite clay is prepared; and finally, the obtained graphite modified polylactic acid layer, the adsorption layer filled with the adsorption fillers and the polylactic acid layer are well placed from top to bottom and closely together in the thermal seal mode through a thermal seal machine. The food fresh-keeping bag has the effect of food fresh keeping, can effectively prevent bacteria and mould from breeding, has the characteristics of easy degradation and has good application value.

Description

technical field [0001] The invention relates to the technical field of food preservation, in particular to a food preservation bag and a preparation method thereof. Background technique [0002] At present, the food preservation bags used in daily life are generally single-layer, and it achieves the purpose of food preservation by vacuumizing the inside of the bag. However, due to external pressure, it is very easy to cause damage to the fresh-keeping bag; and when the external temperature is high, because the fresh-keeping bag is close to the food, the heat absorbed by the food cannot be released, resulting in an inner greenhouse effect, which easily leads to food rot and deterioration. Visible, above-mentioned fresh-keeping bag can't satisfy people's requirement to food fresh-keeping far away. [0003] Bags made of food plastic wrap are mainly used to preserve vegetables, fruits, grains, cooked food and other foods. They are widely used in daily life and become a must-hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/08B32B27/28B32B27/06B32B27/08B32B27/20B32B7/12C08L67/04C08L67/06C08K7/00C08K3/04
CPCB32B5/18B32B7/12B32B27/065B32B27/28B32B2264/102B32B2264/104B32B2264/108B32B2266/0214B32B2307/56B32B2307/7145B32B2307/716B32B2307/7265B32B2439/70B65D31/02C08L67/04C08L2203/16C08L2205/02C08L67/06C08K7/00C08K3/04Y02A40/90Y02W90/10
Inventor 魏芳芳
Owner 合肥天沃能源科技有限公司
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