CN110511416A - A kind of food Package is with stablizing the fresh-keeping plastic foil of moisture absorption and preparation method - Google Patents
A kind of food Package is with stablizing the fresh-keeping plastic foil of moisture absorption and preparation method Download PDFInfo
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- CN110511416A CN110511416A CN201910829362.4A CN201910829362A CN110511416A CN 110511416 A CN110511416 A CN 110511416A CN 201910829362 A CN201910829362 A CN 201910829362A CN 110511416 A CN110511416 A CN 110511416A
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- moisture absorption
- sodium alginate
- stablizing
- food package
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
- C09D105/04—Alginic acid; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
Abstract
The invention belongs to food packaging applications, a kind of food Package is provided with stablizing the fresh-keeping plastic foil of moisture absorption and preparation method, its technical point is: first weighing anhydrous sodium sulfate and is made into aqueous solution, crosslinking agent acetic anhydride and adipic acid mixed acid anhydride is added, adjusting pH value, to 1~2 coagulation bath to be made spare；By sodium alginate plus deionized water dissolving, it is configured to the sodium alginate soln that mass percent concentration is 8%~12%, then it persistently stirs, slowly sodium alginate soln and pre-gelatinized starch, granulated sugar syrup are added in obtained coagulation bath on one side simultaneously, continue to stir 3h at 40~60 DEG C, until obtaining the sodium alginate plural gel by chemical crosslinking；Gained plural gel is taken out, even application has the nylon membrane compared with high permeability, and compound one layer of identical nylon membrane, subsequent compacting obtain the fresh-keeping plastic foil of stable moisture absorption immediately after drying.
Description
Technical field
The invention belongs to food packaging applications, and in particular to a kind of food Package is with stablizing the fresh-keeping plastic foil of moisture absorption and preparation
Method.
Background technique
As the improvement of people's living standards, food safety and food fresh keeping problem are increasingly taken seriously.It is raw in food
During production, packaging material or backing material, as the performance of preservative film or freshness protection package often have to the shelf-life of food it is larger
It influences.At present preservative film save in microwave food heating, refrigerator food, the occasions such as fresh and prepared food packaging, family life,
Supermarket sales field, hotel and industrial food packaging applications are all widely used.
Preservative film is a kind of plastic packing product, plastics package of the preservative film as daily most common a kind of fresh-keeping foodstuff
One of product has appropriate oxygen permeability and moisture permeability, adjusts by the oxygen content and moisture content around fresh-keeping product, barrier
Dust in air, to extend the freshness date of food.The fresh-keeping principle of preservative film are as follows: 1. prevent moisture from distributing, and play sealing
Effect；2. preventing food from losing original delicate flavour in storage；3. air-isolation prevents food from aoxidizing (being infected).
But in food packaging, only by the packaging of common preservative film or freshness protection package, come reach dried foods and
Barrier moisture oxygen purpose be it is inadequate, in general, food drying commodity in order to lower keep packaging in humidity and barrier
Moisture in atmosphere protects content, it is also necessary to be packed into the pouch for being surrounded by the desiccant such as silica dioxide gel together within a package
Deng.Carry out following packaging step, that is, dry commodity are put into bag-shaped packaging material, also investment desiccant package pouch, and
And sealing bag-shaped packaging material.The process of investment desiccant package pouch is usually automated, but puts into desiccant package pouch
Process itself keep packaging process many and diverse, according to dry commodity, put into desiccant package pouch sometimes through manual operations, it is number
It is tired.And desiccant is also possible to accidentally be mixed into food or be eaten by mistake.
Patent of invention 201710749698.0 discloses a kind of semi permeability composite package film and its answering in fruit freshness preserving
With the advantages of being suppressed using trilamellar membrane coextrusion process, having gathered three kinds of films is in one.Semi-permeable membrane can make hydrone saturating
The absorbing membrane slow-absorbing crossed, and be made of the high granulated sugar syrup of pre-gelatinized starch and osmotic pressure, the effect of waterproof membrane is to prevent
Absorbing membrane absorbs the moisture of ambient enviroment, thus reach saturation, it is ineffective.But central filler object stability paste compared with
Difference causes moisture absorption barrier property to decline if packaging film is easy to run off dissipation after puncturing.
It is therefore proposed that a kind of safety and environmental protection, can either replace desiccant dryness food and medicine, and can effectively obstruct in air
Moisture and the moisture absorption wrapping film of oxygen etc. be very necessary.
Summary of the invention
The object of the present invention is to provide a kind of food Packages with the fresh-keeping plastic foil of moisture absorption and preparation method is stablized, for part
The paste central filler object stability of moisture absorption packaging film is poor, be easy to run off cause moisture absorption barrier property decline the problem of, pass through by
Moisture absorption layer filler pre-gelatinized starch, granulated sugar syrup are added during forming sodium alginate cross-linking gel, utilize alginic acid
The cross-linking process of sodium is fixed, then sprays and to form stable moisture barrier, and the cross-linked structure of sodium alginate gel limits
The flowing of moisture absorption filler avoids being lost dissipating and causes barrier property.
Specific technical solution of the present invention is as follows:
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and is made into the aqueous solution that mass concentration is 30-40%, and crosslinking agent acetic anhydride and oneself is added
Diacid mixed acid anhydride, adjusting pH value, to 1~2 coagulation bath to be made spare；
S2: by sodium alginate plus deionized water dissolving, it is configured to the sodium alginate that mass percent concentration is 8%~12%
Then solution persistently stirs, while being on one side slowly added to sodium alginate soln and pre-gelatinized starch, granulated sugar syrup obtained
Coagulation bath in；
S3: heating water bath stirring, until obtaining the sodium alginate plural gel by chemical crosslinking；
S4: gained sodium alginate plural gel is taken out, and even application is compound one layer immediately after nylon membrane, drying
Identical nylon membrane, then compacting obtains the fresh-keeping plastic foil of stable moisture absorption.
In the prior art, the advantages of being suppressed using trilamellar membrane coextrusion process, having gathered three kinds of films is in one.It is semi-transparent
Film can be such that hydrone penetrates, and the absorbing membrane slow-absorbing being made of the high granulated sugar syrup of pre-gelatinized starch and osmotic pressure, prevent
The effect of moisture film is the moisture for preventing absorbing membrane from absorbing ambient enviroment, thus reach saturation, it is ineffective.But centre paste
Filler stability is poor, if packaging film is easy to run off dissipation after puncturing, moisture absorption barrier property is caused to decline, therefore of the invention upper
The method of stating is by adding moisture absorption layer filler pre-gelatinized starch, granulated sugar syrup during forming sodium alginate cross-linking gel
Enter, be fixed using the cross-linking process of sodium alginate, then sprays and to form stable moisture barrier, the friendship of sodium alginate gel
It is coupled structure and limits the flowing of moisture absorption filler, avoids being lost dissipating and cause barrier property, concrete implementation principle is as follows:
Firstly, using anhydrous sodium sulfate, crosslinking agent acetic anhydride and adipic acid mixed acid anhydride adjust pH value be made to 1~2 it is solidifying
Gu bath foam, anhydrous sodium sulfate is uniformly distributed with mixed acid anhydride in the coagulation bath of formation, wherein anhydrous sodium sulfate characteristic is steady
It is fixed, it is exposed to easy to moisture absorption as aqueous sulfuric acid sodium in air.Therefore sodium sulphate can't be with crosslinking in the coagulation bath of formation
Agent reacts, so that crosslinking agent can be completely at being present in the coagulation bath.
Then, sodium alginate soln is configured, by sodium alginate plus deionized water dissolving, being configured to mass percent concentration is
8%~12% sodium alginate soln, is then persistently stirred, at the same on one side slowly by sodium alginate soln and pre-gelatinized starch,
Granulated sugar syrup is added in obtained coagulation bath；Mosanom is a kind of high-molecular compound of high viscosity.It and starch, fibre
Dimension element etc. is a difference in that it has carboxyl, when sodium alginate soln is added in coagulation bath, due to sodium alginate
Water-wet behavior immediately forms very sticky uniform solution, to prevent the stream of former equally distributed sodium sulphate and crosslinking agent
It is dynamic, it is uniformly distributed so that it keeps original, and keep flexibility, homogeneity, so that the fresh-keeping plastic foil eventually formed
Also has the characteristic, sodium alginate and crosslinking agent form sodium alginate cross-linking gel during addition, then add pre-
Gelatinized starch, granulated sugar syrup, are fixed using the cross-linking process of sodium alginate, then are sprayed and to be formed stable moisture barrier,
The cross-linked structure of sodium alginate gel limits the flowing of moisture absorption filler, avoids being lost dissipating and causes barrier property.
Further, the mass ratio of the aqueous solution of the anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid anhydride
For 10-20:3-8.
Further, in the crosslinking agent acetic anhydride and adipic acid mixed acid anhydride, the mass ratio of acetic anhydride and adipic acid is
1-3:2-3。
Further, the coagulation bath configured is controlled its temperature by way of heating water bath and remains at 60 DEG C
Left and right, up-down error is no more than 1.5 DEG C.
Further, the quality of sodium alginate soln described in S2 step, pre-gelatinized starch, granulated sugar syrup and coagulation bath
Than for 10-20:1-5:1-3:30-40.
Further, the temperature of heating water bath is 40~60 DEG C in the step S3, mixing time 3h.
Further, the dry mode used is to be toasted using 50 DEG C of temperature in the step S4.
Further, the spray coating liquor be sprayed on nylon membrane with a thickness of 30-50 μm.
The present invention also provides a kind of a kind of food Packages that above-mentioned preparation method is prepared with stablizing the fresh-keeping plastics of moisture absorption
Film.
Compared with prior art, the present invention its feature for protruding and excellent effect are: by by moisture absorption layer filler
Pre-gelatinized starch, granulated sugar syrup are added during forming sodium alginate cross-linking gel, utilize the cross-linking process of sodium alginate
It is fixed, then sprays and to form stable moisture barrier, the cross-linked structure of sodium alginate gel limits moisture absorption filler
Flowing, thus the film can carry out efficient absorption to moisture, effectively achieve the effect that fresh-keeping.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and be made into mass fraction be 30% aqueous solution, be added crosslinking agent acetic anhydride and oneself two
The mixed acid anhydride that sour mass ratio 1:2 is formed, the wherein aqueous solution of anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid
The mass ratio of acid anhydride is 15:5, and coagulation bath is made in adjusting pH value to 1, and controls its temperature by way of heating water bath and protect always
It holds spare at 60 DEG C or so；
S2: by sodium alginate plus deionized water dissolving, being configured to the sodium alginate soln that mass percent concentration is 8%,
Then it persistently stirs, while sodium alginate soln and pre-gelatinized starch, granulated sugar syrup is slowly added to obtained coagulate on one side
Gu in bath foam, wherein the mass ratio of sodium alginate soln, pre-gelatinized starch, granulated sugar syrup and coagulation bath is 18:5:4:35；
S3: temperature is controlled by the way of heating water bath and continues to stir 3h at 40 DEG C, until obtaining by chemical crosslinking
Sodium alginate plural gel；
S4: gained plural gel is taken out, and even application has the nylon membrane compared with high permeability, and coating thickness is
30 μm, compound one layer of identical nylon membrane, subsequent compacting immediately obtains stable after carrying out baking drying using 50 DEG C of temperature
The fresh-keeping plastic foil of moisture absorption；The nylon membrane of the water penetration is the micro porous nylon membrane with a thickness of 20 μm.
Experiment test: cornstarch is uniformly mixed with water with mass ratio 2:1,30cm × 30cm × 3cm survey is molded into
Then the fresh-keeping plastic foil of moisture absorption that embodiment 1 obtains is wrapped one layer in test specimens by sample, being placed on temperature is 25 DEG C, humidity
For 8% dry environment, places 24 hours, throw off preservative film.Starch block test specimens are observed, starch block surface keeps initially soft
Property and wettability.The antistaling film shows significant fresh-keeping effect in food preservation and food processing process, especially exists
The awake face of fruit freshness preserving, bakery uses very useful.
Embodiment 2
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and be made into mass fraction be 30% aqueous solution, be added crosslinking agent acetic anhydride and oneself two
The mixed acid anhydride that sour mass ratio 1:2 is formed, the wherein aqueous solution of anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid
The mass ratio of acid anhydride is 14:5, and coagulation bath is made in adjusting pH value to 1.3, and controls its temperature always by way of heating water bath
Be maintained at 60 DEG C or so it is spare；
S2: by sodium alginate plus deionized water dissolving, being configured to the sodium alginate soln that mass percent concentration is 9%,
Then it persistently stirs, while sodium alginate soln and pre-gelatinized starch, granulated sugar syrup is slowly added to obtained coagulate on one side
Gu in bath foam, wherein the mass ratio of sodium alginate soln, pre-gelatinized starch, granulated sugar syrup and coagulation bath is 12:3:2:33；
S3: temperature is controlled by the way of heating water bath and continues to stir 3h at 45 DEG C, until obtaining by chemical crosslinking
Sodium alginate plural gel；
S4: gained plural gel is taken out, and even application has the nylon membrane compared with high permeability, and coating thickness is
35 μm, compound one layer of identical nylon membrane, subsequent compacting immediately obtains stable after carrying out baking drying using 50 DEG C of temperature
The fresh-keeping plastic foil of moisture absorption.
Embodiment 3
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and be made into mass fraction be 30% aqueous solution, be added crosslinking agent acetic anhydride and oneself two
The mixed acid anhydride that sour mass ratio 1:3 is formed, the wherein aqueous solution of anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid
The mass ratio of acid anhydride is 16:3, and coagulation bath is made in adjusting pH value to 1.5, and controls its temperature always by way of heating water bath
Be maintained at 60 DEG C or so it is spare；
S2: by sodium alginate plus deionized water dissolving, being configured to the sodium alginate soln that mass percent concentration is 10%,
Then it persistently stirs, while sodium alginate soln and pre-gelatinized starch, granulated sugar syrup is slowly added to obtained coagulate on one side
Gu in bath foam, wherein the mass ratio of sodium alginate soln, pre-gelatinized starch, granulated sugar syrup and coagulation bath is 15:4:2:34；
S3: temperature is controlled by the way of heating water bath and continues to stir 3h at 50 DEG C, until obtaining by chemical crosslinking
Sodium alginate plural gel；
S4: gained plural gel is taken out, and even application has the nylon membrane compared with high permeability, and coating thickness is
40 μm, compound one layer of identical nylon membrane, subsequent compacting immediately obtains stable after carrying out baking drying using 50 DEG C of temperature
The fresh-keeping plastic foil of moisture absorption.
Embodiment 4
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and be made into mass fraction be 30% aqueous solution, be added crosslinking agent acetic anhydride and oneself two
The mixed acid anhydride that sour mass ratio 3:2 is formed, the wherein aqueous solution of anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid
The mass ratio of acid anhydride is 14:7, and coagulation bath is made in adjusting pH value to 1.85, and its temperature beginning is controlled by way of heating water bath
Be maintained at eventually 60 DEG C or so it is spare；
S2: by sodium alginate plus deionized water dissolving, being configured to the sodium alginate soln that mass percent concentration is 11%,
Then it persistently stirs, while sodium alginate soln and pre-gelatinized starch, granulated sugar syrup is slowly added to obtained coagulate on one side
Gu in bath foam, wherein the mass ratio of sodium alginate soln, pre-gelatinized starch, granulated sugar syrup and coagulation bath is 20:1:1:39；
S3: temperature is controlled by the way of heating water bath and continues to stir 3h at 55 DEG C, until obtaining by chemical crosslinking
Sodium alginate plural gel；
S4: gained plural gel is taken out, and even application has the nylon membrane compared with high permeability, and coating thickness is
50mm, compound one layer of identical nylon membrane, subsequent compacting immediately obtains stable after carrying out baking drying using 50 DEG C of temperature
The fresh-keeping plastic foil of moisture absorption.
Embodiment 5
A kind of food Package is with the fresh-keeping plastics membrane preparation method of moisture absorption is stablized, and the method steps are as follows:
S1: weighing anhydrous sodium sulfate and be made into mass fraction be 30% aqueous solution, be added crosslinking agent acetic anhydride and oneself two
The mixed acid anhydride that sour mass ratio 1:2 is formed, the wherein aqueous solution of anhydrous sodium sulfate and crosslinking agent acetic anhydride and adipic acid mixed acid
The mass ratio of acid anhydride is 17:4, and coagulation bath is made in adjusting pH value to 2, and controls its temperature by way of heating water bath and protect always
It holds spare at 60 DEG C or so；
S2: by sodium alginate plus deionized water dissolving, being configured to the sodium alginate soln that mass percent concentration is 12%,
Then it persistently stirs, while sodium alginate soln and pre-gelatinized starch, granulated sugar syrup is slowly added to obtained coagulate on one side
Gu in bath foam, wherein the mass ratio of sodium alginate soln, pre-gelatinized starch, granulated sugar syrup and coagulation bath is 10:5:1:38；
S3: temperature is controlled by the way of heating water bath and continues to stir 3h at 60 DEG C, until obtaining by chemical crosslinking
Sodium alginate plural gel；
S4: gained plural gel is taken out, and even application has the nylon membrane compared with high permeability, and coating thickness is
50 μm, compound one layer of identical nylon membrane, subsequent compacting immediately obtains stable after carrying out baking drying using 50 DEG C of temperature
The fresh-keeping plastic foil of moisture absorption.
Comparative example 1
Compared with Example 1, crosslinking agent and sodium alginate are not added in this programme when implementing for comparative example 1.Do not formed
The cross-linked structure of sodium alginate gel, thus the film is impacted to the absorption moisture retention of moisture.
It is tested according to the method for embodiment 1, cornstarch is uniformly mixed with water with mass ratio 2:1, is molded into
Then the fresh-keeping plastic foil of moisture absorption that embodiment 1 obtains is wrapped one layer in test specimens, put by 30cm × 30cm × 3cm test specimens
Setting in temperature is 25 DEG C, and the dry environment that humidity is 8% is placed 24 hours, throws off preservative film.Starch block test specimens are observed, are formed sediment
Powder agglomates surface moist is obviously deteriorated compared to embodiment 1, but starch still maintains flexible fastly.
Comparative example 2
Compared with Example 1, comparative example 2 is directly pasted with a thickness of 40 μm of polyethylene film two sides with a thickness of 20 μm
Micro porous nylon membrane.
It is tested according to the method for embodiment 1, cornstarch is uniformly mixed with water with mass ratio 2:1, is molded into
Then the plastic foil that embodiment 1 obtains is wrapped one layer in test specimens, is placed on temperature by 30cm × 30cm × 3cm test specimens
It is 25 DEG C, the dry environment that humidity is 8% is placed 24 hours, throws off preservative film.Observe starch block test specimens, starch block surface
Dry and cracked, starch loses flexibility fastly.
Claims (9)
1. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption, it is characterised in that: the method steps are as follows:
S1: weighing anhydrous sodium sulfate and is made into the aqueous solution that mass concentration is 30-40%, and crosslinking agent acetic anhydride and adipic acid is added
Mixed acid anhydride, adjusting pH value, to 1~2 coagulation bath to be made spare；
S2: by sodium alginate plus deionized water dissolving, it is molten to be configured to the sodium alginate that mass percent concentration is 8%~12%
Then liquid persistently stirs, while being on one side slowly added to sodium alginate soln and pre-gelatinized starch, granulated sugar syrup obtained
In coagulation bath；
S3: heating water bath stirring, until obtaining the sodium alginate plural gel by chemical crosslinking；
S4: gained sodium alginate plural gel is taken out, even application in nylon membrane, it is dry after immediately compound one layer it is identical
Nylon membrane, then compacting obtain the fresh-keeping plastic foil of stable moisture absorption.
2. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: institute
It states the aqueous solution of anhydrous sodium sulfate and the mass ratio of crosslinking agent acetic anhydride and adipic acid mixed acid anhydride is 10-20:3-8.
3. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: institute
It states in crosslinking agent acetic anhydride and adipic acid mixed acid anhydride, the mass ratio of acetic anhydride and adipic acid is 1-3:2-3.
4. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: match
The coagulation bath set is controlled its temperature by way of heating water bath and remains at 60 DEG C or so, and up-down error does not surpass
Cross 1.5 DEG C.
5. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: S2
Sodium alginate soln described in step, pre-gelatinized starch, granulated sugar syrup and coagulation bath mass ratio be 10-20:1-5:1-3:
30-40。
6. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: institute
The temperature for stating heating water bath in step S3 is 40~60 DEG C, mixing time 3h.
7. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: step
The dry mode used described in rapid S4 is to be toasted using 50 DEG C of temperature.
8. a kind of food Package is with stablizing the fresh-keeping plastics membrane preparation method of moisture absorption according to claim 1, it is characterised in that: institute
State spray coating liquor be sprayed on nylon membrane with a thickness of 30-50 microns.
9. the food Package that any one of claim 1~8 the method is prepared is with stablizing the fresh-keeping plastic foil of moisture absorption.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115058043A (en) * | 2022-08-18 | 2022-09-16 | 汕头市龙琪塑料制品有限公司 | High-density polyethylene medicine packaging material with nano slow-release antibacterial layer and preparation method and application thereof |
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| CN107988796A (en) * | 2017-12-29 | 2018-05-04 | 成都新柯力化工科技有限公司 | A kind of plastic fresh-keeping membrane and preparation method for Kiwi berry packaging |
| CN108192125A (en) * | 2018-03-08 | 2018-06-22 | 成都新柯力化工科技有限公司 | A kind of food of high-adhesive-strength barrier package plastic foil and preparation method |
| US20180249746A1 (en) * | 2007-06-08 | 2018-09-06 | Philip Morris Usa Inc. | Capsule clusters for oral consumption |
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| US20180249746A1 (en) * | 2007-06-08 | 2018-09-06 | Philip Morris Usa Inc. | Capsule clusters for oral consumption |
| CN107988796A (en) * | 2017-12-29 | 2018-05-04 | 成都新柯力化工科技有限公司 | A kind of plastic fresh-keeping membrane and preparation method for Kiwi berry packaging |
| CN108192125A (en) * | 2018-03-08 | 2018-06-22 | 成都新柯力化工科技有限公司 | A kind of food of high-adhesive-strength barrier package plastic foil and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115058043A (en) * | 2022-08-18 | 2022-09-16 | 汕头市龙琪塑料制品有限公司 | High-density polyethylene medicine packaging material with nano slow-release antibacterial layer and preparation method and application thereof |
| CN115058043B (en) * | 2022-08-18 | 2022-11-22 | 汕头市龙琪塑料制品有限公司 | High-density polyethylene medicine packaging material with nano slow-release antibacterial layer and preparation method and application thereof |
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Denomination of invention: The invention relates to a stable moisture absorption and fresh-keeping plastic film for food packaging and a preparation method thereof Effective date of registration: 20211222 Granted publication date: 20201211 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. high tech Zone Green sub branch Pledgor: Huzhou Dali Intelligent Equipment Manufacturing Co.,Ltd. Registration number: Y2021330002600 |
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Date of cancellation: 20230912 Granted publication date: 20201211 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. high tech Zone Green sub branch Pledgor: Huzhou Dali Intelligent Equipment Manufacturing Co.,Ltd. Registration number: Y2021330002600 |