CN104162993A

CN104162993A - Edible film manufactured through gel extrusion method

Info

Publication number: CN104162993A
Application number: CN201310186218.6A
Authority: CN
Inventors: 苑会林; 邹真妮
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2013-05-20
Filing date: 2013-05-20
Publication date: 2014-11-26

Abstract

The invention belongs to the field of food processing, and relates to an edible film manufactured through a gel extrusion method. Edibility raw materials like gel are mixed with plasticizers, cross-linking agents and water, and then are swelled and dissolved, static defoaming is carried out, then, the edibility raw materials and solid raw materials are jointly extruded to be formed through double screw rods, the edible film is obtained, and casting, drying, cooling, edge cutting and rolling are carried out on the film, and then the edible film can become an edible film fished product. The technology for processing the edible film has the advantages of being capable of achieving continuous production and easy to operate, reducing the energy consumption, shortening the production period and the like.

Description

Gel extrusion molding is prepared edible film

One, technical field

The invention belongs to food processing field, relate to the technique that a kind of gel extrusion molding is prepared edible film.

Two, background technology

As everyone knows, edible film has own unique feature, its degradable, pollution-free, belong to environmental protection shaped material, in addition, it can prevent that the migration of gas, steam and solute etc. from avoiding the variation of food at aspects such as transporting procedures generation local flavor, matter structures, and then ensures the quality of food, extend Food Shelf-life, thus very extensive in the application of food service industry.In addition, not singly packaged food entire package use, be the packaging of object like that especially for the condiments juice or the medicine soup that are Chinese noodle soup, can also deal with the difficult point that is difficult to open when consumer uses.Therefore, the research of edible package film has also caused many researchers' interest.

The preparation method of edible film packaging film mainly adopts film forming liquid is poured on substrate at present, then dry mode of taking off film, and this coating process is difficult for continuous operation, and production efficiency is low.Also have and report and can improve the production efficiency of edible film with steel band casting machine, but the water content of film liquid is higher, drying time is longer, thereby production cost increases, and film and steel band peel off poor effect.The production technology of edible film of the present invention is used double screw extruder directly to extrude the edible film that water content is lower, reaches reduction energy consumption, shortens the object of production cycle.

Three, summary of the invention

The object of the invention is to take gel extrusion moulding to prepare edible packing membrane.Be characterized in solving current edible film film forming production efficiency low, energy consumption is large, peels off the shortcomings such as weak effect with attachment material, realizes low energy and produces efficiently, for the marketization application of edible film provides technical support.

The object of the invention is to be realized by following technical measures, wherein said raw material umber, except specified otherwise, is mass fraction.

Edible film provided by the invention, has following mass parts composition:

Edibility material: 100 parts

Plasticizer: 10～50 parts

Crosslinking agent: 0～4 part

Water: 30～80 parts

Wherein said edibility material is the edibility materials such as gelatin, starch, shitosan, soybean protein, cellulose, can be both wherein a kind of can be also the mixture of two or more material.Preferential gelatin.

Described plasticizer is generally glycerine, ethylene glycol or both mixtures by a certain percentage.Preferably glycerine.

Described crosslinking agent is generally Geniposide, TGase or their mixture.Preferably transglutaminase.

The technique that gel extrusion molding of the present invention is prepared edible film comprises following processing step:

(1) 100 parts of gelatin being divided into two parts, being used separately as obtain solution and direct reinforced use, both ratios are preferably 1: 4～and 1: 2;

(2) gelatin, plasticizer, crosslinking agent and the water configuration solution used mix swelling 0.5～1h, are placed in the constant temperature water bath stirring and dissolving 0.5～2h of 60～90 DEG C;

(3) by the solution making sealing and standing de-bubble in the baking oven of 60～90 DEG C, the solution making is called wet component, and is directly called dry basis as reinforced part gelatin;

(4) double screw extruder Si Ge district temperature is respectively: 80～100 DEG C, a district, two 90～120 DEG C, districts, three 100～130 DEG C, districts, four 100～140 DEG C, districts.Grinding tool temperature is 80～90 DEG C;

(5) fixing extruder rotational frequency is 4～12Hz, and the component that will wet and dry basis add in twin-screw by certain mass ratio, makes transparent film continuously;

(6) by the film extruded through curtain coating, dry, make water content in final film lower than 5%, then cooling, trimming, rolling are edible film finished product.

The present invention adopt gel extrude the tape casting moulded products have can be continuously produced, simple to operate, lower energy consumption, shorten the feature such as production cycle, can realize fairly large serialization and produce.The edible film making by the inventive method has good mechanical property, uniform film thickness and controlled, and edible fast water-soluble again, the advantages such as oil resistance, nutrient health, can be widely used in packaging for foodstuff industry and biological medicine industry.

Four, concrete embodiment

With embodiment, the present invention will be further described below

Embodiment 1

(1) 1000g gelatin is divided into two parts, is used separately as obtain solution and directly reinforced use, both ratios are 1: 2.76;

(2) gelatin, plasticizer 200g, crosslinking agent 1g and the water 400g that configuration solution are used mix swelling 0.5h, are placed in the constant temperature water bath stirring and dissolving 1h of 90 DEG C;

(3) by the solution making sealing and standing de-bubble in the baking oven of 90 DEG C, the solution making is called wet component, and is directly called dry basis as reinforced part gelatin;

(4) double screw extruder Si Ge district temperature is respectively: 80 DEG C, a district, two 100 DEG C, districts, three 100 DEG C, districts, four 100 DEG C, districts.Grinding tool temperature is 80 DEG C;

(5) fixing extruder rotational frequency is 5Hz, and the component that will wet and dry basis add in twin-screw by certain mass ratio, makes transparent film continuously;

Embodiment 2

(2) gelatin, plasticizer 300g, crosslinking agent 0g and the water 400g that configuration solution are used mix swelling 0.5h, are placed in the constant temperature water bath stirring and dissolving 1h of 90 DEG C;

(4) double screw extruder Si Ge district temperature is respectively: 90 DEG C, a district, two 110 DEG C, districts, three 110 DEG C, districts, four 110 DEG C, districts.Grinding tool temperature is 80 DEG C;

(5) fixing extruder rotational frequency is 8Hz, and the component that will wet and dry basis add in twin-screw by certain mass ratio, makes transparent film continuously;

Embodiment 3

(2) gelatin, plasticizer 400g, crosslinking agent 2g and the water 400g that configuration solution are used mix swelling 0.5h, are placed in the constant temperature water bath stirring and dissolving 1h of 90 DEG C;

(4) double screw extruder Si Ge district temperature is respectively: 90 DEG C, a district, two 105 DEG C, districts, three 110 DEG C, districts, four 120 DEG C, districts.Grinding tool temperature is 85 DEG C;

(5) fixing extruder rotational frequency is 10Hz, and the component that will wet and dry basis add in twin-screw by certain mass ratio, makes transparent film continuously;

Through curtain coating, dry, make water content in final film lower than 5% the film extruded, then cooling, trimming, rolling are edible film finished product.

Claims

1. gel extrusion molding is prepared edible film and is referred to gelatin and other edibility material blend are made after solution with the method through double screw extruder film extrusion together with gelatin solid particle.Gel extrusion molding is prepared a technique for edible film, it is characterized in that comprising following technique: (1) is stirred to dissolving by gelatin afterwards and under uniform temperature or/and some other edible substrates, plasticizer, crosslinking agent and water mixing are swelling; (2) solution making sealing and standing de-bubble at a certain temperature, what obtain is referred to as wet component; (3) will wet component and dry basis (edible substrates solid particle) adds film extrusion in twin-screw by a constant-speed ratio; (4) film making entered calendering, dry, cooling, rolling can obtain edible film finished product.

2. a kind of gel extrusion molding according to claim 1 is prepared the technique of edible film, it is characterized in that: described edibility material is the edibility materials such as gelatin, starch, shitosan, soybean protein, cellulose, can be both wherein a kind of can be also that two or more material coordinates rear employing the method film forming by a certain percentage.

3. a kind of gel extrusion molding according to claim 1 is prepared the technique of edible film, it is characterized in that: described plasticizer is glycerine, ethylene glycol or both coordinate rear use by a certain percentage.

4. a kind of gel extrusion molding according to claim 1 is prepared the technique of edible film, it is characterized in that: described crosslinking agent is Geniposide, TGase or their mixture.

5. a kind of gel extrusion molding according to claim 1 is prepared the technique of edible film, it is characterized in that: the method for its film forming is that dry basis and wet component add double screw extruder blending extrusion film forming by a constant-speed ratio.