CN101381470A - Preparation method of edible packaging film using soja bean dietary fiber as matrix - Google Patents

Abstract

The invention provides a method for preparing an edible packaging film using soybean fiber as substrate. The method is characterized by comprising the following steps: enzyme digesting, super microcrushing, sifting, homogenizing, boiling, deaerating, film coating, drying and samming. The method has the advantages of good barrier performance, excellent mechanical performance, fast dissolving speed, no pollution, simple production process and easy mass production.

Description

A kind of is the preparation method of the edible packaging film of matrix with the soybean dietary fibre

Technical field

The present invention relates to a kind of preparation method of edible packaging film, relating in particular to a kind of is the preparation method of the edible packaging film of matrix with the soybean dietary fibre.

Background technology

Along with the progress of society and the people attention all the more to living environment, people recognize that gradually " white garbage " caused irremediable destruction to environment.Though plastic wrapping has made things convenient for people's life, its non-degradable and destructive its limitation in Future Society is used that determined, this has caused the attention of people to the wrapping material development of substituted for plastic.At present, had the part scholar to utilize protein, starch etc. for matrix, added certain auxiliary material and prepared edible packaging film, and have applied for patent.

The present invention utilizes bean dregs to be feedstock production edible film material.The food fibre that will extract from bean dregs is processed into the approach that edible film is the soybean comprehensive utilization, not only can improve the comprehensive utilization ratio of soybean, simultaneously the edible packaging film of excellent property can also be prepared, thereby plastics packed non-degradable and destructive problem can be solved.The food fibre that extracts from bean dregs have functions such as high retention ability, absorption chelating, the full abdomen of filling, change enteric microorganism population, so it improves Digestive tract at human body, prevents to play an important role aspect colorectal carcinoma and the other diseases.

Summary of the invention

The object of the present invention is to provide a kind of is the preparation method of the edible packaging film of matrix with the soybean dietary fibre, and the edible packaging film of this method system has characteristics such as barrier property is good, mechanical property is good, dissolution rate is fast.

The present invention is achieved like this, and it is characterized in that the processing method step is:

(1) enzymolysis: it is soluble in water that wet bean dregs are pressed 1:10, NaOH solution with 5% is regulated pH to 12, be heated to 70 ℃ and be incubated 1～2h, be cooled to 40 ℃, regulate pH to 6 with HCl solution, the adding weight ratio is 0.5%～2% papoid, constantly stirs and be incubated 1～2h, makes proteolysis contained in the bean dregs;

(2) micronizing: utilize supper micron mill with the broken 20～30min of soy bean edible fiber powder that extracts;

(3) sieve: will cross 100 purposes sieve and collection through the soybean dietary fibre that micronizing is handled;

(4) homogeneous: will sieve and the fiber solution of aquation homogeneous 3～5 times under 40～60MPa, and obtain the homogeneous fibre mixed solution;

(5) boil: with the fiber solution behind homogeneous heating and boil 2～3min, make the abundant swelling of food fibre;

(6) degassing: with the tunica fibrosa liquid heated and boiled 2～3min for preparing, be cooled to 70 ℃, adding weight ratio is 0.5～1.5% carboxymethyl cellulose (CMC) and 0.25～1% sodium alginate, is stirred to dissolving fully, and adding weight ratio again is 0.25～1.5% beeswax, stir, be cooled to room temperature, preferably adding weight ratio is 0.75～2.5% glycerine, stirs, under the condition of 25 ℃ of vacuum tightness 0.08MPa, temperature, preserve 1～2h, take off the gas in the tunica fibrosa liquid;

(7) film: utilize the rod of filming slowly to be coated with layer of even film liquid on sheet glass, the thickness of control wet film is 2mm;

(8) drying: utilize air dry oven dry 2～3h under 60～70 ℃ condition, the position that will constantly change sheet glass in the drying process is to reach even exsiccant purpose;

(9) sam: utilize climatic chamber under the condition of 30 ℃ of relative humidity 65%, temperature, to preserve 1～2h, its objective is in order to make tunica fibrosa be convenient to take off and get.

Advantage of the present invention is: barrier property is good, mechanical property is good, dissolution rate is fast, pollution-free, and production process is simple, produces in enormous quantities easily.

Embodiment

Embodiment one

Take by weighing the fresh bean dregs of 10Kg removal impurity, add water 100L, regulate pH to 12 with 5% NaOH solution, be heated to 70 ℃ and be incubated 1h, be cooled to 40 ℃, regulate pH to 6 with HCl solution, add weight ratio and be 0.5% papoid and be incubated 1h, be washed to elutriant and become clarification, drain, 60 ℃ of oven dry obtain soybean dietary fibre.With the soybean dietary fibre micronizing, cross 100 mesh sieves, in the ratio preparation fiber solution of 1:30, homogeneous is 3 times under 40MPa.Take by weighing the fiber solution that 100g handles well, heated and boiled 2min, be cooled to 70 ℃, adding weight ratio is 0.5%CMC and 0.25% sodium alginate, be stirred to dissolving fully, adding weight ratio is 0.25% beeswax, stirs, and is cooled to room temperature, add weight ratio 0.75% glycerine, stir, vacuum outgas 1h utilizes the rod thickness according to 2mm on glass stick of filming to film, dry 2h under 60 ℃ the condition, under the condition of 30 ℃ of relative humidity 65% temperature, preserve 1h after drying is finished, take off film, obtain edible packaging film.

Embodiment two

Take by weighing the fresh bean dregs of 10Kg removal impurity, add water 100L, regulate pH to 12 with 5% NaOH solution, be heated to 70 ℃ and be incubated 2h, be cooled to 40 ℃, regulate pH to 6 with HCl solution, add 2% papoid and be incubated 2h, be washed to elutriant and become clarification, drain, 60 ℃ of oven dry obtain soybean dietary fibre.With the soybean dietary fibre micronizing, cross 100 mesh sieves, in the ratio preparation fiber solution of 1:30, homogeneous is 5 times under 60MPa.Take by weighing the fiber solution that 100g handles well, heated and boiled 3min, be cooled to 70 ℃, adding weight ratio is 1.5%CMC and 1% sodium alginate, be stirred to dissolving fully, adding weight ratio is 1.5% beeswax, stirs, and is cooled to room temperature, add weight ratio 2.5% glycerine, stir, vacuum outgas 2h utilizes the rod thickness according to 2mm on glass stick of filming to film, dry 3h under 70 ℃ the condition, under the condition of 30 ℃ of relative humidity 65% temperature, preserve 2h after drying is finished, take off film, obtain edible packaging film.

Claims (1)

1, a kind of is the preparation method of the edible packaging film of matrix with the soybean dietary fibre, it is characterized in that the processing method step is:

(1) enzymolysis: it is soluble in water that wet bean dregs are pressed 1:10, NaOH solution with 5% is regulated pH to 12, be heated to 70 ℃ and be incubated 1～2h, be cooled to 40 ℃, regulate pH to 6 with HCl solution, the adding weight ratio is 0.5%～2% papoid, constantly stirs and be incubated 1～2h, makes proteolysis contained in the bean dregs;

(2) micronizing: utilize supper micron mill with the broken 20～30min of soy bean edible fiber powder that extracts;

(3) sieve: will cross 100 purposes sieve and collection through the soybean dietary fibre that micronizing is handled;

(4) homogeneous: will sieve and the fiber solution of aquation homogeneous 3～5 times under 40～60MPa, and obtain the homogeneous fibre mixed solution;

(5) boil: with the fiber solution behind homogeneous heating and boil 2～3min, make the abundant swelling of food fibre;

(6) degassing: with the tunica fibrosa liquid heated and boiled 2～3min for preparing, be cooled to 70 ℃, adding weight ratio is 0.5～1.5% carboxymethyl cellulose and 0.25～1% sodium alginate, is stirred to dissolving fully, adding weight ratio again is 0.25～1.5% beeswax, stir, be cooled to room temperature, preferably adding weight ratio is 0.75～2.5% glycerine, stir, at vacuum tightness 0.08Mpa, preserve 1～2h under the condition that temperature is 25 ℃, take off the gas in the tunica fibrosa liquid;

(7) film: utilize the rod of filming slowly to be coated with layer of even film liquid on sheet glass, the thickness of control wet film is 2mm;

(8) drying: utilize air dry oven dry 2～3h under 60～70 ℃ condition, the position that will constantly change sheet glass in the drying process is to reach even exsiccant purpose;

(9) sam: utilize climatic chamber under the condition of 30 ℃ of relative humidity 65%, temperature, to preserve 1～2h.