CN107312285A - A kind of agricultural products fresh-keeping film and preparation method thereof - Google Patents
A kind of agricultural products fresh-keeping film and preparation method thereof Download PDFInfo
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- CN107312285A CN107312285A CN201710650121.4A CN201710650121A CN107312285A CN 107312285 A CN107312285 A CN 107312285A CN 201710650121 A CN201710650121 A CN 201710650121A CN 107312285 A CN107312285 A CN 107312285A
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/08—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/463—Edible packaging materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
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- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/08—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08J2389/00—Characterised by the use of proteins; Derivatives thereof
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- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
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- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/08—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08J2489/00—Characterised by the use of proteins; Derivatives thereof
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- C08J2493/00—Characterised by the use of natural resins; Derivatives thereof
- C08J2493/02—Shellac
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- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C08L2203/16—Applications used for films
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a kind of agricultural products fresh-keeping film, the preservative film includes following raw material according to parts by weight：6 ~ 19 parts of epoxy resin modification styrene-acrylic latex, 3 ~ 16 parts of polyvinyl chloride, 5 ~ 19 parts of chitosan zeins, 2 ~ 13 parts of wormwood, 15 ~ 35 parts of cloves, 5 ~ 10 parts of shellac powder, 5 ~ 9 parts of marine alga silicon sodium, 5 ~ 12 parts of glyceryl monostearate, 5 ~ 9 parts of ethyl cellulose, 2 ~ 8 parts of hydroxysuccinimidyl acyl Asia, 6 ~ 18 parts of starch, amylase 2 ~ 5 part, 0.2 ~ 2.5 part of antiseptic, 1.8 ~ 9.5 parts of plasticizer.A kind of preservative film of agricultural product of offer of the present invention and preparation method thereof, its raw material sources is extensively, with low cost, with wide market prospects, improves the fresh-keeping permeability of tradition.
Description
Technical field
The invention belongs to agricultural products fresh-keeping field, and in particular to a kind of agricultural products fresh-keeping film and preparation method thereof.
Background technology
Preservative film is a kind of plastic packing product, is generally made up using ethene of masterbatch of polymerisation, is mainly used in micro-
The occasions such as the heating of ripple stove food, refrigerator food are preserved, fresh and prepared food packaging, family life, supermarket sales field, hotel and
Industrial food packaging applications are all widely used.Different according to material therefor and addition plasticiser, preservative film is divided into many
Type, is applicable to different occasions.Preservative film receives the favor of people with it the characteristics of convenient, economical, attractive in appearance.So
And, due to generally with the addition of plasticiser in process of production, influence of the preservative film to health also receives the concern of people.
Storage technique after fruit and vegetable picking is increasingly paid close attention to by people, and the preservation technologies of good fruits and vegetables can be with
Reduce the income that fruits and vegetables grower is improved because the loss that fruits and vegetables rot and cause.Universal preservation method is used at present
Mainly there are deepfreeze and chemical preservation etc., but the general power consumption of these methods is high, fresh-keeping cost is larger, the chemistry guarantor of addition
Fresh dose has harmful effect to health.
In recent years, preservative film preservation technology is widely used, but traditional preservative film is vinyon, and it is breathed freely
Property is poor, during fruits and vegetables long-term storage, it is impossible to moisture in adjusting film, causes preservative film inner air humidity excessive, microorganism
Quick breeding, causes fruits and vegetables to rot mouldy.
The content of the invention
In view of the above-mentioned problems, being used for agricultural products fresh-keeping film and its preparation the technical problem to be solved in the present invention is to provide one kind
Method, it is poor that obtained preservative film overcomes traditional preservative film ventilation performance.
To achieve the above object, the technical scheme is that：A kind of agricultural products fresh-keeping film, the preservative film is according to parts by weight
Including following raw material：6 ~ 19 parts of epoxy resin modification styrene-acrylic latex, 3 ~ 16 parts of polyvinyl chloride, chitosan zeins 5 ~ 19
Part, 2 ~ 13 parts of wormwood, 15 ~ 35 parts of cloves, 5 ~ 10 parts of shellac powder, 5 ~ 9 parts of marine alga silicon sodium, 5 ~ 12 parts of glyceryl monostearate,
5 ~ 9 parts of ethyl cellulose, 2 ~ 8 parts of hydroxysuccinimidyl acyl Asia, 6 ~ 18 parts of starch, amylase 2 ~ 5 part, 0.2 ~ 2.5 part of antiseptic, plasticising
1.8 ~ 9.5 parts of agent.
Further, the preservative film includes following raw material according to parts by weight：6 parts of epoxy resin modification styrene-acrylic latex, polychlorostyrene
3 parts of ethene, 5 parts of chitosan zeins, 2 parts of wormwood, 15 parts of cloves, 5 parts of shellac powder, 5 parts of marine alga silicon sodium, glycerine list
5 parts of stearate, 5 parts of ethyl cellulose, 2 parts of hydroxysuccinimidyl acyl Asia, 6 parts of starch, amylase 2 part, 0.2 part of antiseptic, plasticising
1.8 parts of agent.
Further, the antiseptic is vanillic aldehyde or ethyl vanillin aldehydes compound.
Further, the preparation technology of the epoxy resin modification styrene-acrylic latex specifically includes following steps：
A. the preparation of pre-emulsion, added in equipped with electric mixer, the three-necked flask of constant pressure funnel emulsifying agent SDS,
PH conditioning agents, the mix monomer styrene of dissolved epoxy and deionized water, the pre- breast of high-speed stirred under 500 ~ 600r/min
Change 20 ~ 30min, pre-emulsion is made；
B. emulsion is synthesized, and add water stirring in equipped with electric mixer, reflux condensing tube, the four-hole boiling flask of constant pressure funnel,
85 ~ 87 DEG C are warming up to, the pre-emulsion and initiator of 1/3rd contents is added, stirring to system obvious blue light occurs, opened
Begin that remaining pre-emulsion and initiator ammonium persulfate solution is added dropwise, uniformly dripped in 2 ~ 3h, 1 ~ 2h of isothermal reaction, heated up
To 80 ~ 90 DEG C, 0.5 ~ 1h is incubated, 40 ~ 50 DEG C are then cooled to, discharging obtains epoxy resin modification styrene-acrylic latex.
Further, the initiator is ammonium persulfate initiator.
Further, the starch is cornstarch or wheaten starch, and the amylase is alpha-amylase.
A kind of method for preparing agricultural products fresh-keeping film, specific preparation process is：
Step 1：Successively according to parts by weight weigh epoxy resin modification styrene-acrylic latex, polyvinyl chloride, wormwood, cloves, shellac powder,
In marine alga silicon sodium, glyceryl monostearate gauze wrapped, immersion deionized water, 85 ~ 95 DEG C are heated to, 0.5 ~ 1h of boiling takes out
Gauze is wrapped up, extrudes 3 ~ 6 times, is placed again into appropriate amount of deionized water, 80 ~ 90 DEG C are heated to, 1.5 ~ 2.5h of boiling takes out parcel
Thing, and extrude 3 ~ 5 times, the mixed liquor obtained by boiling twice is merged, is cooled to after room temperature, is filtered, gained filtrate is moved into and revolved
Turn in evaporator, 80 ~ 150min of spin concentration obtains concentration filtrate A；
Step 2：Successively ethyl cellulose, hydroxysuccinimidyl acyl Asia, starch, amylase, antiseptic, plasticising are weighed according to parts by weight
Agent, adds and fills in the beaker of deionized water, stirring obtains mixed liquid B until being completely dissolved, and then will be obtained again in step 1
Concentration filtrate A and mixed liquid B are mixed together stirring, with 10 ~ 15min of stirring under 300 ~ 600r/min rotating speeds in thermostat water bath
Obtain mixing pasty liquid；
Step 3：Mixing pasty liquid is taken out, 100 ~ 250 mesh sieves is crossed, obtains thin pasty liquid, 250~280 DEG C are heated to, casting machine is added
In hopper, regulation scraper knife is away from for 0.3 ~ 0.9mm, making thin pasty liquid form film on runner, and regulation chill-roll temperature is to normal
Temperature, makes film on runner be quickly cooled to type, regulation winding tension is 80 ~ 100N, makes the film after cooling coiled, produces agricultural production
Product preservative film.
Further, a width of 2000 ~ 5000mm of film in the step 3.
The beneficial effects of the present invention are：A kind of preservative film of agricultural product of offer of the present invention and preparation method thereof, it is former
Material source is extensively, with low cost, with wide market prospects, improves the fresh-keeping permeability of tradition；The present invention is made
Most preservative film material source obtained is green and healthy material, and such as cloves, wormwood, shellac powder, obtained preservative film are big
It is big to extend the agricultural products fresh-keeping time, peasant is reduced because the economic loss that agricultural product are corrupt and cause；
Chitosan zeins and epoxy resin modification styrene-acrylic latex are added in preservative film prepared by the present invention and is mixed,
Its raw material proportioning advantages of simple, and the time of mixing pretreatment is shorter, the condition for mixing pretreatment is simple, when shorter
In can emulsify chitosan zeins, improve the barrier property of maize alcohol-soluble protein film, mechanical performance and
Bacteriostasis property, and with characteristics such as degradable, edibles.Tests prove that the bacteriostasis rate of the preservative film, water vapor transmittance, moisture-inhibiting
Coefficient increases.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, do not limit
The fixed present invention.
Embodiment 1
A kind of agricultural products fresh-keeping film, the preservative film includes following raw material according to parts by weight：6 parts of epoxy resin modification styrene-acrylic latex,
It is 3 parts of polyvinyl chloride, 5 parts of chitosan zeins, 2 parts of wormwood, 15 parts of cloves, 5 parts of shellac powder, 5 parts of marine alga silicon sodium, sweet
Sub- 2 parts of oily 5 parts of monostearate, 5 parts of ethyl cellulose, hydroxysuccinimidyl acyl, 6 parts of starch, amylase 2 part, 0.2 part of antiseptic,
1.8 parts of plasticizer.
The antiseptic is vanillic aldehyde or ethyl vanillin aldehydes compound.
The preparation technology of the epoxy resin modification styrene-acrylic latex specifically includes following steps：
A. the preparation of pre-emulsion, added in equipped with electric mixer, the three-necked flask of constant pressure funnel emulsifying agent SDS,
PH conditioning agents, the mix monomer styrene of dissolved epoxy and deionized water, the high-speed stirred pre-emulsification under 500r/min
20mim, is made pre-emulsion；
B. emulsion is synthesized, and add water stirring in equipped with electric mixer, reflux condensing tube, the four-hole boiling flask of constant pressure funnel,
85 DEG C are warming up to, the pre-emulsion and initiator of 1/3rd contents is added, obvious blue light occurs in stirring to system, starts drop
Plus remaining pre-emulsion and initiator ammonium persulfate solution, uniformly dripped in 2h, isothermal reaction 1h is warming up to 80 DEG C,
0.5h is incubated, 40 DEG C are then cooled to, discharging obtains epoxy resin modification styrene-acrylic latex.
The initiator is ammonium persulfate initiator.
The starch is cornstarch or wheaten starch, and the amylase is alpha-amylase.
A kind of method for preparing agricultural products fresh-keeping film, specific preparation process is：
Step 1：Successively according to parts by weight weigh epoxy resin modification styrene-acrylic latex, polyvinyl chloride, wormwood, cloves, shellac powder,
In marine alga silicon sodium, glyceryl monostearate gauze wrapped, immersion deionized water, 85 DEG C are heated to, boiling 0.5h takes out parcel
Gauze, extrudes 3 times, is placed again into appropriate amount of deionized water, is heated to 80 DEG C, boiling 1.5h takes out wrappage, and extrudes 3 times,
Mixed liquor obtained by boiling twice is merged, is cooled to after room temperature, is filtered, gained filtrate is moved into rotary evaporator, rotation
80 ~ 150min of concentration obtains concentration filtrate A；
Step 2：Successively ethyl cellulose, hydroxysuccinimidyl acyl Asia, starch, amylase, antiseptic, plasticising are weighed according to parts by weight
Agent, adds and fills in the beaker of deionized water, stirring obtains mixed liquid B until being completely dissolved, and then will be obtained again in step 1
Concentration filtrate A and mixed liquid B are mixed together stirring, are mixed in thermostat water bath with stirring 10min under 300r/min rotating speeds
Close pasty liquid；
Step 3：Mixing pasty liquid is taken out, 100 mesh sieves is crossed, obtains thin pasty liquid, 250 DEG C are heated to, added in casting machine hopper, is adjusted
Scraper knife is saved away from for 0.3mm, making thin pasty liquid form film on runner, regulation chill-roll temperature makes thin on runner to normal temperature
Film is quickly cooled to type, and regulation winding tension is 80N, makes the film after cooling coiled, produces agricultural products fresh-keeping film.
The a width of 2000mm of film in the step 3.
Embodiment 2
A kind of agricultural products fresh-keeping film, the preservative film includes following raw material according to parts by weight：10 parts of epoxy resin modification styrene-acrylic latex,
10 parts of polyvinyl chloride, 15 parts of chitosan zeins, 7 parts of wormwood, 25 parts of cloves, 7 parts of shellac powder, 7 parts of marine alga silicon sodium,
9 parts of glyceryl monostearate, 7 parts of ethyl cellulose, hydroxysuccinimidyl acyl are sub- 5 parts, 12 parts of starch, 3 parts of amylase, antiseptic 1.5
Part, 1.9 parts of plasticizer.
The antiseptic is vanillic aldehyde or ethyl vanillin aldehydes compound.
The preparation technology of the epoxy resin modification styrene-acrylic latex specifically includes following steps：
A. the preparation of pre-emulsion, added in equipped with electric mixer, the three-necked flask of constant pressure funnel emulsifying agent SDS,
PH conditioning agents, the mix monomer styrene of dissolved epoxy and deionized water, the high-speed stirred pre-emulsification under 550r/min
25min, is made pre-emulsion；
B. emulsion is synthesized, and add water stirring in equipped with electric mixer, reflux condensing tube, the four-hole boiling flask of constant pressure funnel,
86 DEG C are warming up to, the pre-emulsion and initiator of 1/3rd contents is added, obvious blue light occurs in stirring to system, starts drop
Plus remaining pre-emulsion and initiator ammonium persulfate solution, uniformly dripped in 2.5h, isothermal reaction 1.5h is warming up to 85
DEG C, 0.6h is incubated, 45 DEG C are then cooled to, discharging obtains epoxy resin modification styrene-acrylic latex.
The initiator is ammonium persulfate initiator.
The starch is cornstarch or wheaten starch, and the amylase is alpha-amylase.
A kind of method for preparing agricultural products fresh-keeping film, specific preparation process is：
Step 1：Successively according to parts by weight weigh epoxy resin modification styrene-acrylic latex, polyvinyl chloride, wormwood, cloves, shellac powder,
In marine alga silicon sodium, glyceryl monostearate gauze wrapped, immersion deionized water, 90 DEG C are heated to, boiling 0.6h takes out parcel
Gauze, extrudes 5 times, is placed again into appropriate amount of deionized water, is heated to 85 DEG C, boiling 2h takes out wrappage, and extrudes 4 times, will
The mixed liquor obtained by boiling merges twice, is cooled to after room temperature, filters, and gained filtrate is moved into rotary evaporator, rotates dense
Contracting 120min obtains concentration filtrate A；
Step 2：Successively ethyl cellulose, hydroxysuccinimidyl acyl Asia, starch, amylase, antiseptic, plasticising are weighed according to parts by weight
Agent, adds and fills in the beaker of deionized water, stirring obtains mixed liquid B until being completely dissolved, and then will be obtained again in step 1
Concentration filtrate A and mixed liquid B are mixed together stirring, are mixed in thermostat water bath with stirring 13min under 500r/min rotating speeds
Close pasty liquid；
Step 3：Mixing pasty liquid is taken out, 150 mesh sieves is crossed, obtains thin pasty liquid, 260 DEG C are heated to, added in casting machine hopper, is adjusted
Scraper knife is saved away from for 0.6mm, making thin pasty liquid form film on runner, regulation chill-roll temperature makes thin on runner to normal temperature
Film is quickly cooled to type, and regulation winding tension is 90N, makes the film after cooling coiled, produces agricultural products fresh-keeping film.
The a width of 4000mm of film in the step 3.
Embodiment 3
A kind of agricultural products fresh-keeping film, the preservative film includes following raw material according to parts by weight：19 parts of epoxy resin modification styrene-acrylic latex,
16 parts of polyvinyl chloride, 19 parts of chitosan zeins, 13 parts of wormwood, 35 parts of cloves, 10 parts of shellac powder, marine alga silicon sodium 9
Part, sub- 8 parts 12 parts of glyceryl monostearate, 9 parts of ethyl cellulose, hydroxysuccinimidyl acyl, 18 parts of starch, 5 parts of amylase, antiseptic
2.5 parts, 9.5 parts of plasticizer.
The antiseptic is vanillic aldehyde or ethyl vanillin aldehydes compound.
The preparation technology of the epoxy resin modification styrene-acrylic latex specifically includes following steps：
A. the preparation of pre-emulsion, added in equipped with electric mixer, the three-necked flask of constant pressure funnel emulsifying agent SDS,
PH conditioning agents, the mix monomer styrene of dissolved epoxy and deionized water, the high-speed stirred pre-emulsification under 600r/min
30mim, is made pre-emulsion；
B. emulsion is synthesized, and add water stirring in equipped with electric mixer, reflux condensing tube, the four-hole boiling flask of constant pressure funnel,
87 DEG C are warming up to, the pre-emulsion and initiator of 1/3rd contents is added, obvious blue light occurs in stirring to system, starts drop
Plus remaining pre-emulsion and initiator ammonium persulfate solution, uniformly dripped in 3h, 1 ~ 2h of isothermal reaction is warming up to 90
DEG C, 1h is incubated, 50 DEG C are then cooled to, discharging obtains epoxy resin modification styrene-acrylic latex.
The initiator is ammonium persulfate initiator.
The starch is cornstarch or wheaten starch, and the amylase is alpha-amylase.
A kind of method for preparing agricultural products fresh-keeping film, specific preparation process is：
Step 1：Successively according to parts by weight weigh epoxy resin modification styrene-acrylic latex, polyvinyl chloride, wormwood, cloves, shellac powder,
In marine alga silicon sodium, glyceryl monostearate gauze wrapped, immersion deionized water, 95 DEG C are heated to, boiling 1h takes out wrapped yarns
Cloth, extrudes 6 times, is placed again into appropriate amount of deionized water, is heated to 90 DEG C, boiling 2.5h takes out wrappage, and extrudes 5 times, will
The mixed liquor obtained by boiling merges twice, is cooled to after room temperature, filters, and gained filtrate is moved into rotary evaporator, rotates dense
Contracting 150min obtains concentration filtrate A；
Step 2：Successively ethyl cellulose, hydroxysuccinimidyl acyl Asia, starch, amylase, antiseptic, plasticising are weighed according to parts by weight
Agent, adds and fills in the beaker of deionized water, stirring obtains mixed liquid B until being completely dissolved, and then will be obtained again in step 1
Concentration filtrate A and mixed liquid B are mixed together stirring, are obtained in thermostat water bath with stirring 10 ~ 15min under 600r/min rotating speeds
Mix pasty liquid；
Step 3：Mixing pasty liquid is taken out, 250 mesh sieves is crossed, obtains thin pasty liquid, 280 DEG C are heated to, added in casting machine hopper, is adjusted
Scraper knife is saved away from for 0.9mm, making thin pasty liquid form film on runner, regulation chill-roll temperature makes thin on runner to normal temperature
Film is quickly cooled to type, and regulation winding tension is 100N, makes the film after cooling coiled, produces agricultural products fresh-keeping film.
The a width of 5000mm of film in the step 3.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of agricultural products fresh-keeping film, it is characterised in that the preservative film includes following raw material according to parts by weight：Epoxy resin modification
6 ~ 19 parts of styrene-acrylic latex, 3 ~ 16 parts of polyvinyl chloride, 5 ~ 19 parts of chitosan zeins, 2 ~ 13 parts of wormwood, cloves 15 ~ 35
Part, 5 ~ 10 parts of shellac powder, 5 ~ 9 parts of marine alga silicon sodium, 5 ~ 12 parts of glyceryl monostearate, 5 ~ 9 parts of ethyl cellulose, hydroxysuccinimidyl
2 ~ 8 parts of acyl Asia, 6 ~ 18 parts of starch, amylase 2 ~ 5 part, 0.2 ~ 2.5 part of antiseptic, 1.8 ~ 9.5 parts of plasticizer.
2. a kind of agricultural products fresh-keeping film according to claim 1, it is characterised in that the preservative film according to parts by weight include with
Lower raw material：6 parts of epoxy resin modification styrene-acrylic latex, 3 parts of polyvinyl chloride, 5 parts of chitosan zeins, 2 parts of wormwood, cloves
15 parts, 5 parts of shellac powder, 5 parts of marine alga silicon sodium, 5 parts of glyceryl monostearate, 5 parts of ethyl cellulose, sub- 2 parts of hydroxysuccinimidyl acyl,
6 parts of starch, amylase 2 part, 0.2 part of antiseptic, 1.8 parts of plasticizer.
3. a kind of agricultural products fresh-keeping film according to claim 1, it is characterised in that the antiseptic is vanillic aldehyde or second
Basic note grass aldehyde compound.
4. a kind of agricultural products fresh-keeping film according to claim 1, it is characterised in that the epoxy resin modification styrene-acrylic latex
Preparation technology specifically include following steps：
A. the preparation of pre-emulsion, added in equipped with electric mixer, the three-necked flask of constant pressure funnel emulsifying agent SDS,
PH conditioning agents, the mix monomer styrene of dissolved epoxy and deionized water, the pre- breast of high-speed stirred under 500 ~ 600r/min
Change 20 ~ 30min, pre-emulsion is made；
B. emulsion is synthesized, and add water stirring in equipped with electric mixer, reflux condensing tube, the four-hole boiling flask of constant pressure funnel,
85 ~ 87 DEG C are warming up to, the pre-emulsion and initiator of 1/3rd contents is added, stirring to system obvious blue light occurs, opened
Begin that remaining pre-emulsion and initiator ammonium persulfate solution is added dropwise, uniformly dripped in 2 ~ 3h, 1 ~ 2h of isothermal reaction, heated up
To 80 ~ 90 DEG C, 0.5 ~ 1h is incubated, 40 ~ 50 DEG C are then cooled to, discharging obtains epoxy resin modification styrene-acrylic latex.
5. a kind of agricultural products fresh-keeping film according to claim 4, it is characterised in that the initiator triggers for ammonium persulfate
Agent.
6. a kind of agricultural products fresh-keeping film according to claim 1, it is characterised in that the starch is cornstarch or small
Wheat starch, the amylase is alpha-amylase.
7. a kind of method of the agricultural products fresh-keeping film prepared as any one of claim 1 to 6, it is characterised in that specific
Preparation process is：
Step 1：Successively according to parts by weight weigh epoxy resin modification styrene-acrylic latex, polyvinyl chloride, wormwood, cloves, shellac powder,
In marine alga silicon sodium, glyceryl monostearate gauze wrapped, immersion deionized water, 85 ~ 95 DEG C are heated to, 0.5 ~ 1h of boiling takes out
Gauze is wrapped up, extrudes 3 ~ 6 times, is placed again into appropriate amount of deionized water, 80 ~ 90 DEG C are heated to, 1.5 ~ 2.5h of boiling takes out parcel
Thing, and extrude 3 ~ 5 times, the mixed liquor obtained by boiling twice is merged, is cooled to after room temperature, is filtered, gained filtrate is moved into and revolved
Turn in evaporator, 80 ~ 150min of spin concentration obtains concentration filtrate A；
Step 2：Successively ethyl cellulose, hydroxysuccinimidyl acyl Asia, starch, amylase, antiseptic, plasticising are weighed according to parts by weight
Agent, adds and fills in the beaker of deionized water, stirring obtains mixed liquid B until being completely dissolved, and then will be obtained again in step 1
Concentration filtrate A and mixed liquid B are mixed together stirring, with 10 ~ 15min of stirring under 300 ~ 600r/min rotating speeds in thermostat water bath
Obtain mixing pasty liquid；
Step 3：Mixing pasty liquid is taken out, 100 ~ 250 mesh sieves is crossed, obtains thin pasty liquid, 250~280 DEG C are heated to, casting machine is added
In hopper, regulation scraper knife is away from for 0.3 ~ 0.9mm, making thin pasty liquid form film on runner, and regulation chill-roll temperature is to normal
Temperature, makes film on runner be quickly cooled to type, regulation winding tension is 80 ~ 100N, makes the film after cooling coiled, produces agricultural production
Product preservative film.
8. a kind of method for preparing agricultural products fresh-keeping film according to claim 7, it is characterised in that in the step 3
A width of 2000 ~ the 5000mm of film.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530907A (en) * | 2018-04-18 | 2018-09-14 | 通化市山城工业有限公司 | A kind of preparation method of environmental-friendpacking packing material |
| US11560487B2 (en) | 2020-09-22 | 2023-01-24 | Swimc Llc | Coating compositions containing low molecular weight chitosan composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105218918A (en) * | 2015-09-21 | 2016-01-06 | 苏州新区佳合塑胶有限公司 | A kind of agricultural-food that are used for are preserved by transparent micropore plastic wrap and preparation technology thereof |
| CN105906853A (en) * | 2016-04-27 | 2016-08-31 | 吴迪 | Method for preparing fruit and vegetable fresh-keeping films |
| CN107286460A (en) * | 2017-08-02 | 2017-10-24 | 合肥帧讯低温科技有限公司 | A kind of agricultural product preservative film and preparation method thereof |
-
2017
- 2017-08-02 CN CN201710650121.4A patent/CN107312285A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105218918A (en) * | 2015-09-21 | 2016-01-06 | 苏州新区佳合塑胶有限公司 | A kind of agricultural-food that are used for are preserved by transparent micropore plastic wrap and preparation technology thereof |
| CN105906853A (en) * | 2016-04-27 | 2016-08-31 | 吴迪 | Method for preparing fruit and vegetable fresh-keeping films |
| CN107286460A (en) * | 2017-08-02 | 2017-10-24 | 合肥帧讯低温科技有限公司 | A kind of agricultural product preservative film and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530907A (en) * | 2018-04-18 | 2018-09-14 | 通化市山城工业有限公司 | A kind of preparation method of environmental-friendpacking packing material |
| US11560487B2 (en) | 2020-09-22 | 2023-01-24 | Swimc Llc | Coating compositions containing low molecular weight chitosan composition |
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