CN106751270A - A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and preparation method thereof - Google Patents

A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and preparation method thereof Download PDF

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Publication number
CN106751270A
CN106751270A CN201611153181.7A CN201611153181A CN106751270A CN 106751270 A CN106751270 A CN 106751270A CN 201611153181 A CN201611153181 A CN 201611153181A CN 106751270 A CN106751270 A CN 106751270A
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polyvinyl alcohol
tear
sodium sulfate
ultrasonic
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陈强
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions 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 an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • C08J2329/00—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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/06—Biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/14—Gas barrier composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film, it is characterised in that it is prepared from by following raw material：Camellia seed, dried peppermint leaf, oenothera biennis, lilac, acetone, anhydrous sodium sulfate, wool, titanium dioxide, dodecyl sodium sulfate, trypsase, hydrogen peroxide, wheaten starch, acetic acid, acetic anhydride, lauryl methacrylate, polyvinyl alcohol, citrate, cornstarch, zinc stearate, appropriate deionized water.Tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film of the invention, good mechanical property, Stability Analysis of Structures, good permeability, there is good antibacterial action simultaneously, can slow down fruits and vegetables endogenous metabolism is aging and inoculating microbe caused by it is corrupt, significantly prolong storage period and effectively keep fruit-vegetable quality.

Description

A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and preparation method thereof
Technical field
The invention belongs to material and agriculture field, and in particular to a kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and its Preparation method.
Background technology
At present, fruits and vegetables storage and preservation method mainly have deepfreeze, controlled atmosphere, irradiation, chemical sterilization and preservative film to pack Deng.Wherein, fresh-keeping film method with its low cost, simple to operate, widely applicable, effect is obvious the advantages of be widely used.At present The preservative film for being used mainly has common preservative film, micropore plastic wrap, anti-fog function preservative film, edible freshness-keeping thin coat and antibacterial to protect Fresh film etc..Because the requirement of various preserving fruit and vegetable utilizings is different, the preservative film of simple function can not meet requirement, therefore, it is provided simultaneously with resisting Bacterium, deoxygenation, dry, except the development of the multifunctional packaging material of the functions such as ethene is necessary.
Author Jiang Yan et al. exists《The preparation of chitosan-PE double-layer bacteriostatic preservative film and the research of biocidal property》In one text, knot Shitosan good film forming and broad-spectrum antibacterial and the preferable mechanical strength of PE films and barrier are closed, shitosan-PE is prepared double Layer bacteriostasis, preservation film.The preservative film mechanical strength and barrier are pretty good, but exist and easily condensed in preservative film in storage Problem.
The content of the invention
It is an object of the invention to provide a kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and preparation method thereof, this is thin Film not only has good gas permeability, also with excellent mechanical strength.
To achieve these goals, present invention employs following technical scheme：
A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film, it is characterised in that it is prepared from by the raw material of following weight portion： Camellia seed 8-10 parts, dried peppermint leaf 6-8 parts, oenothera biennis 1.5-2 parts, lilac 2-3 parts, acetone 80-100 parts, anhydrous sodium sulfate 8- 10 parts, wool 20-25 parts, titanium dioxide 6-8 parts, dodecyl sodium sulfate 4-5 parts, trypsase 0.05-0.1 parts, hydrogen peroxide 8-10 parts, wheaten starch 20-25 parts, acetic acid 6-8 parts, acetic anhydride 5-6 parts, lauryl methacrylate 2-3 parts, polyvinyl alcohol 220-250 parts, citrate 8-10 parts, cornstarch 25-30 parts, zinc stearate 3-4 parts, appropriate deionized water.
Described tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film, it is characterised in that it is prepared from by following steps：
（1）Camellia seed is shelled, after being well mixed with dried peppermint leaf, oenothera biennis and lilac, 80-100 mesh is crushed to, using 1/2 Acetone ultrasonic extraction 2-3 times, each ultrasonic extraction conditions：40-50 DEG C of temperature, ultrasonic power 300-400W, ultrasonic wave added Filtrate is collected in extraction time 40-50min, filtering, and merging filtrate obtains filtrate a；Filter cake is extracted by remaining acetone microwave Take 3-4 times, the condition of each microwave abstracting：Microwave power is 650-700w, and radiated time is 50-60min, filtering, collects filter Liquid, obtains filtrate b；Filtrate a and filtrate b is merged, by 70-80 DEG C of vacuum distillation recovered solvent, product anhydrous sodium sulfate 20-24h is dried, tea-seed oil is obtained；
（2）Wool cleaning is cleaned, the removal of impurity is gone, after 30-40 DEG C of forced air drying, with titanium dioxide mixed grinding 40-50min, plus Enter to step（1）Product, dodecyl sodium sulfate and the deionized water equivalent to 18-20 times of dodecyl sodium sulfate weight portion In the solution of configuration, after mixing and stirring, it is 70-75 DEG C to be heated to temperature, and constant temperature holding 30-40min, regulation system PH are 7-8, adds trypsase and hydrogen peroxide, and ultrasonic frequency is 30-38kHz, and temperature is 45-50 DEG C, ultrasonic vibration 50- 60min, by temperature lifting to 80-85 DEG C, regulation pH is 3-4, heating stirring treatment 8-10min for heating；Again by the pH value of system Regulation to 7-8, filtering, with a large amount of deionized water rinsings 3-4 times；40-50 DEG C of forced air drying；
（3）Wheaten starch is fully dried, with acetic acid and the solution of deionized water configuration equivalent to 12-15 times of acetic acid weight portion It is well mixed, 130-140 DEG C is warmed up under conditions of stirring, 4-5h is kept, room temperature is cooled to, acetic anhydride is added dropwise, drip After add lauryl methacrylate, ultrasonic mixing 15-20min, then under conditions of microwave power is 350-400w, spoke 15-20min is penetrated, is cooled down, be poured into precipitation in cold water, filtering, washing to neutrality are dried, standby；
（4）Polyvinyl alcohol and citrate are delivered to by automatic conveying device carries out full and uniform mixing in homogenizer 40-50min, adds cornstarch, step（2）Product, step（3）Product, zinc stearate, carry out full and uniform mixing 1.5-2h, well mixed material melting extrusion in double screw extruder；Cooled down in Quench roller surface, chilling temperature is 25-30℃；After carrying out preheating 40-45min under 70-80 DEG C, 8-10MPa, cross directional stretch is carried out, be then cooled to 25-30 DEG C shaped；30-35min is preheated under 90-100 DEG C, 8-10MPa, longitudinal stretching is carried out, 25-30 DEG C is then cooled to Shaped；Winding, obtains tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film.
Beneficial effects of the present invention are：The present invention prepares tea using raw materials such as camellia seed, dried peppermint leaf, oenothera biennis, lilacs Seed oil, can not only suppress bacterium and microbial growth and with high-efficiency broad spectrum sterilization functions；The tea seed that the present invention will be prepared Oil absorption is on wool, then is ground together with titanium dioxide, further improves preservative film antibacterial ability；Film prepared by polyvinyl alcohol With good transparency and glossiness, larger tensile strength and tearing strength, fabulous gas barrier property, good heat Conjunction property and cementability etc., and its water-soluble and biological degradability can efficiently solve asking for numerous packaging film feature of environmental protection differences Topic；And melting will be together heated after wheaten starch graft esterification with polyvinyl alcohol, increase the degree of cross linking and the polymerization of polyvinyl alcohol Degree, further enhances the pliability of preservative film；The addition of wool, using its grain size is small, the characteristic such as specific surface area is big, to protecting Fresh film plays a part of enhancing pliability and reduces fragility, assigns preservative film of the present invention excellent tear resistance；The present invention Tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film, good mechanical property, Stability Analysis of Structures, good permeability, while having good anti- Bacterium acts on, can slow down fruits and vegetables endogenous metabolism is aging and inoculating microbe caused by it is corrupt, significantly prolong storage period and effectively Keep fruit-vegetable quality.
Specific embodiment
The tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film of the present embodiment, it is prepared from by the raw material of following weight portion： 10 parts of camellia seed, 8 parts of dried peppermint leaf, 2 parts of oenothera biennis, 3 parts of lilac, 80 parts of acetone, 8 parts of anhydrous sodium sulfate, 25 parts of wool, titanium white 8 parts of powder, 5 parts of dodecyl sodium sulfate, 0.1 part of trypsase, 8 parts of hydrogen peroxide, 25 parts of wheaten starch, 8 parts of acetic acid, acetic anhydride 6 parts, 3 parts of lauryl methacrylate, 250 parts of polyvinyl alcohol, 10 parts of citrate, 30 parts of cornstarch, zinc stearate 4 Part, appropriate deionized water.
2nd, the tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film according to claims 1, it is characterised in that it is by such as Lower step is prepared from：
（1）Camellia seed is shelled, after being well mixed with dried peppermint leaf, oenothera biennis and lilac, 100 mesh is crushed to, using 1/2 third Ketone ultrasonic extraction 3 times, each ultrasonic extraction conditions：Temperature 50 C, ultrasonic power 400W, ultrasound assisted extraction time 50min, Filtering, collects filtrate, and merging filtrate obtains filtrate a；Filter cake is passed through into remaining acetone microwave abstracting 4 times, each microwave abstracting Condition：Microwave power is 700w, and radiated time is 60min, filtering, collects filtrate, obtains filtrate b；By filtrate a and filtrate b Merge, by 80 DEG C of vacuum distillation recovered solvents, product anhydrous sodium sulfate drying 24h obtains tea-seed oil；
（2）Wool cleaning is cleaned, the removal of impurity is gone, after 40 DEG C of forced air dryings, with titanium dioxide mixed grinding 50min, step is added to Suddenly（1）Product, dodecyl sodium sulfate and molten equivalent to what the deionized water of 20 times of dodecyl sodium sulfate weight portion was configured In liquid, after mixing and stirring, it is 75 DEG C to be heated to temperature, and it is 7-8 that constant temperature keeps 40min, regulation system PH, adds tryptose Enzyme and hydrogen peroxide, ultrasonic frequency are 38kHz, and temperature is 45 DEG C, and ultrasonic vibration 60min, heating lifts to 85 DEG C temperature, Regulation pH is 3-4, heating stirring treatment 10min；The pH value of system is adjusted to 7-8 again, a large amount of deionized water rinsings are used in filtering 4 times；40 DEG C of forced air dryings；
（3）Wheaten starch is fully dried, is mixed with acetic acid and equivalent to the solution that the deionized water of 15 times of acetic acid weight portion is configured Close uniform, 140 DEG C are warmed up under conditions of stirring, keep 5h, cool to room temperature, acetic anhydride is added dropwise, first is added after dripping Base lauryl acid esters, ultrasonic mixing 20min then under conditions of microwave power is 400w, radiates 20min, and cooling is inclined Enter precipitation in cold water, filtering, washing to neutrality are dried, standby；
（4）Polyvinyl alcohol and citrate are delivered to by automatic conveying device carries out full and uniform mixing in homogenizer 50min, adds cornstarch, step（2）Product, step（3）Product, zinc stearate, carry out full and uniform mixing 2h, mix Close the melting extrusion in double screw extruder of uniform material；Cooled down in Quench roller surface, chilling temperature is 30 DEG C；80 DEG C, carry out preheating 45min under 8MPa after, carry out cross directional stretch, be then cooled to 30 DEG C and shaped；In 100 DEG C, 10MPa Lower preheating 35min, carries out longitudinal stretching, is then cooled to 30 DEG C and is shaped；Winding, obtains tear-resistant polyvinyl alcohol really Vegetable antistaling film.
After tested, the tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film of the present embodiment, tensile strength is more than 30MPa, fracture Elongation is more than 150%, and light transmittance is more than 90%, and film both sides temperature difference is more than 5 DEG C.

Claims (2)

1. a kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film, it is characterised in that its prepared by the raw material of following weight portion and Into：Camellia seed 8-10 parts, dried peppermint leaf 6-8 parts, oenothera biennis 1.5-2 parts, lilac 2-3 parts, acetone 80-100 parts, anhydrous sodium sulfate 8-10 parts, wool 20-25 parts, titanium dioxide 6-8 parts, dodecyl sodium sulfate 4-5 parts, trypsase 0.05-0.1 parts, peroxidating Hydrogen 8-10 parts, wheaten starch 20-25 parts, acetic acid 6-8 parts, acetic anhydride 5-6 parts, lauryl methacrylate 2-3 parts, polyethylene Alcohol 220-250 parts, citrate 8-10 parts, cornstarch 25-30 parts, zinc stearate 3-4 parts, appropriate deionized water.
2. the tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film according to claims 1, it is characterised in that it by walking as follows Suddenly it is prepared from：
（1）Camellia seed is shelled, after being well mixed with dried peppermint leaf, oenothera biennis and lilac, 80-100 mesh is crushed to, using 1/2 Acetone ultrasonic extraction 2-3 times, each ultrasonic extraction conditions：40-50 DEG C of temperature, ultrasonic power 300-400W, ultrasonic wave added Filtrate is collected in extraction time 40-50min, filtering, and merging filtrate obtains filtrate a；Filter cake is extracted by remaining acetone microwave Take 3-4 times, the condition of each microwave abstracting：Microwave power is 650-700w, and radiated time is 50-60min, filtering, collects filter Liquid, obtains filtrate b；Filtrate a and filtrate b is merged, by 70-80 DEG C of vacuum distillation recovered solvent, product anhydrous sodium sulfate 20-24h is dried, tea-seed oil is obtained；
（2）Wool cleaning is cleaned, the removal of impurity is gone, after 30-40 DEG C of forced air drying, with titanium dioxide mixed grinding 40-50min, plus Enter to step（1）Product, dodecyl sodium sulfate and the deionized water equivalent to 18-20 times of dodecyl sodium sulfate weight portion In the solution of configuration, after mixing and stirring, it is 70-75 DEG C to be heated to temperature, and constant temperature holding 30-40min, regulation system PH are 7-8, adds trypsase and hydrogen peroxide, and ultrasonic frequency is 30-38kHz, and temperature is 45-50 DEG C, ultrasonic vibration 50- 60min, by temperature lifting to 80-85 DEG C, regulation pH is 3-4, heating stirring treatment 8-10min for heating；Again by the pH value of system Regulation to 7-8, filtering, with a large amount of deionized water rinsings 3-4 times；40-50 DEG C of forced air drying；
（3）Wheaten starch is fully dried, with acetic acid and the solution of deionized water configuration equivalent to 12-15 times of acetic acid weight portion It is well mixed, 130-140 DEG C is warmed up under conditions of stirring, 4-5h is kept, room temperature is cooled to, acetic anhydride is added dropwise, drip After add lauryl methacrylate, ultrasonic mixing 15-20min, then under conditions of microwave power is 350-400w, spoke 15-20min is penetrated, is cooled down, be poured into precipitation in cold water, filtering, washing to neutrality are dried, standby；
（4）Polyvinyl alcohol and citrate are delivered to by automatic conveying device carries out full and uniform mixing in homogenizer 40-50min, adds cornstarch, step（2）Product, step（3）Product, zinc stearate, carry out full and uniform mixing 1.5-2h, well mixed material melting extrusion in double screw extruder；Cooled down in Quench roller surface, chilling temperature is 25-30℃；After carrying out preheating 40-45min under 70-80 DEG C, 8-10MPa, cross directional stretch is carried out, be then cooled to 25-30 DEG C shaped；30-35min is preheated under 90-100 DEG C, 8-10MPa, longitudinal stretching is carried out, 25-30 DEG C is then cooled to Shaped；Winding, obtains tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film.
CN201611153181.7A 2016-12-14 2016-12-14 A kind of tear-resistant polyvinyl alcohol preserving fruit and vegetable utilizing film and preparation method thereof Withdrawn CN106751270A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103772863A (en) * 2014-01-20 2014-05-07 南通天合包装有限公司 Antifog preservative film and preparation method thereof
CN104610581A (en) * 2015-01-15 2015-05-13 安徽巢湖南方膜业有限责任公司 Degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables
CN104610757A (en) * 2015-01-15 2015-05-13 安徽巢湖南方膜业有限责任公司 Degradable cereal prolamin-chitosan composite packaging film for fruits and vegetables
CN105585803A (en) * 2015-12-25 2016-05-18 佛山市博维环保材料有限公司 Breathable fresh-keeping film with degrading capability and preparation method of breathable fresh-keeping film
CN105694320A (en) * 2016-03-22 2016-06-22 华南农业大学 Plant source extract anti-bacterial preservative film, and preparation method and application thereof
CN105885114A (en) * 2016-06-24 2016-08-24 安徽德琳环保发展（集团）有限公司 Silica-enhanced caprolactone-starch degradable thin film and preparation method thereof
CN106065090A (en) * 2016-08-22 2016-11-02 太湖华强科技有限公司 Caprolactone starch degradable thin film that a kind of polyvinyl alcohol strengthens and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103772863A (en) * 2014-01-20 2014-05-07 南通天合包装有限公司 Antifog preservative film and preparation method thereof
CN104610581A (en) * 2015-01-15 2015-05-13 安徽巢湖南方膜业有限责任公司 Degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables
CN104610757A (en) * 2015-01-15 2015-05-13 安徽巢湖南方膜业有限责任公司 Degradable cereal prolamin-chitosan composite packaging film for fruits and vegetables
CN105585803A (en) * 2015-12-25 2016-05-18 佛山市博维环保材料有限公司 Breathable fresh-keeping film with degrading capability and preparation method of breathable fresh-keeping film
CN105694320A (en) * 2016-03-22 2016-06-22 华南农业大学 Plant source extract anti-bacterial preservative film, and preparation method and application thereof
CN105885114A (en) * 2016-06-24 2016-08-24 安徽德琳环保发展（集团）有限公司 Silica-enhanced caprolactone-starch degradable thin film and preparation method thereof
CN106065090A (en) * 2016-08-22 2016-11-02 太湖华强科技有限公司 Caprolactone starch degradable thin film that a kind of polyvinyl alcohol strengthens and preparation method thereof

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Application publication date: 20170531