CN101543243A - Special nano-antibacterial fresh-keeping film for papayas, and manufacturing method thereof - Google Patents
Special nano-antibacterial fresh-keeping film for papayas, and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides a special nano-antibacterial fresh-keeping film for papayas, and a manufacturing method thereof. The film comprises the following components by weight portion: 90 to 99 portions of low-density polyethylene resin, 0.1 to 10 portions of air-permeable water-impermeable support body, 0.1 to 10 portions of antibacterial agent containing nano-antibacterial components, 0.01 to 5 portions of ethylene absorbing-decomposing agent, and 0.01 to 5 portions of coupling agent. The invention also provides the manufacturing method thereof. By adding the air-permeable water-impermeable support body, the antibacterial agent containing nano-antibacterial components, the ethylene absorbing-decomposing agent, the coupling agent and other functional components to the low-density polyethylene resin, good fresh-keeping effect is achieved.
Description
Technical field
The present invention relates to a kind of special nano-antibacterial fresh-keeping film for papayas and preparation method thereof, particularly a kind of special nano-antibacterial fresh-keeping film for papayas that contains inorganic functional material and preparation method thereof.
Background technology
Modern medicine proves that pawpaw fruit contains carpaine, papain, renin, carrotene etc.; And be rich in 17 kinds with upper amino acid and various nutrient elements; Wherein contained olive composition be a kind of have protect liver and fall the compound that enzyme, anti-inflammatory are antibacterial, reduce effect such as blood fat.Research finds that also pawpaw has the ability that stops human carcinogen's material nitrosamine to synthesize.The height of ascorbic content is 48 times of apple unexpectedly in the pawpaw! Normal meal pawpaw has suppressing the hyperactive liver and easing the stomach, Shujin Lip river alive, softening blood vessel, anti-inflammation, anti-ageing beauty treatment, anti-cancer and cancer-preventing, the health-care efficacy of building up health; Pawpaw be a kind of nutritious, hundred benefits are arranged and the treasure fruit of fruit of none evil.
The pawpaw preservation technique has low-temperature cold store, controlled atmosphere, antistaling agent processing, polybag or newspaper packing etc., and grim storage and controlled atmosphere cold facility investment are big, the cost height; Handle pawpaw with antistaling agent, there is safety issue in residual antistaling agent; Packing pawpaw with plastic film bag, is a kind of simple and easy to do fresh-retaining preserving means.
The plastic film packaging bag that present preserving fruit and vegetable utilizing is used is made with polyethylene, polypropylene, polyvinyl chloride, polyester etc., and fresh keeping time is short.In order to improve the plastic film bag fresh-keeping effect, people attempt to improve by following measure, but still can't satisfy fruits and vegetables and change instructions for uses such as storage in season, long-distance transport, outlet.
The inorganic porous material that for example adds 3%-5% in polyethylene film is as large space between muscles stone, coral powder etc.The ethylene gas that produces in the bag can be absorbed, a large amount of ethylene gas that fruits and vegetables send can not be absorbed fully but add porous mass.
Perhaps natural activity potter's clay and polyethylene are mixed and made into the plastic sheeting that has superfine micropore, gas and aqueous dispersion that fruits and vegetables are produced in storing and transporting send out, but this control of product quality difficulty, the fresh-keeping effect instability.
In addition the mould inhibitor thiabendazole is added in polyethylene film, polypropylene film, polyvinyl chloride film and the various composite membrane with the amount of 0.1%-0.2%, but use this class antimicrobial technology separately, only can delay fruits and vegetables to a certain extent and rot.
A kind of preserving fruit and vegetable utilizing plastic sheeting is disclosed among the Chinese patent CN1262592, be inorganic humectant, antiseptic, ethene to be absorbed component and resin compounded such as distintegrant and make preservative film, it has regulated and control the microenvironment in the Fruit and vegetable preserving bag, and by having improved the compatibility of each storeroom with coupling agent and dispersant, and crops such as cucumber, fresh kidney beans, eggplant, shaddock fresh-keeping had certain effect.Yet there is the defective that material therefor is comparatively complicated, some material price is expensive in this patent; And because kind difference, the ingredient difference of various fruit trees and vegetables, the gas that produces in storing and transporting is also different with the amount of moisture, and the preservative film of this patent is unsatisfactory for the preservation of pawpaw.Therefore, still need to develop at the characteristics of pawpaw and strong, the effective pawpaw antistaling film of specificity that designs.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the object of the present invention is to provide a kind of special nano-antibacterial fresh-keeping film for papayas and manufacture method thereof, is to add function ingredients such as the supporter of permeable watertight, the antiseptic that contains the nano-antibacterial composition, ethene absorption distintegrant, coupling agent in ldpe resin.
For achieving the above object, the invention provides a kind of pawpaw special plastic antistaling film, it comprises the component of following weight proportion: ldpe resin 90-99 part, supporter 0.1-10 part of permeable watertight, antiseptic 0.1-10 part of containing the nano-antibacterial composition, ethene absorbs distintegrant 0.01-5 part, coupling agent 0.01-5 part.
Wherein, the supporter of described permeable watertight is selected from a kind of (average grain diameter is 50mm) in ultrafine inorganic powder organic montmorillonite or the activated earth.
The described antiseptic that contains the nano-antibacterial composition is the mixture of the arbitrary proportion of a kind of nano inorganic antimicrobial agent and a kind of organic antibacterial agent.Preferably, the weight ratio of nano inorganic antimicrobial agent and organic antibacterial agent is 1:10-10:1 in the described mixture.
Described ethene absorbs distintegrant and is selected from a kind of in potassium permanganate, potassium bichromate, KI, the calper calcium peroxide.
Described coupling agent is selected from chelating type lactic acid titanate esters, isopropyl three (polyether-based iso-octyl pyrophosphoryl oxygen base) titanate esters, phosphate monoester, triisopropyl borate ester, γ-chloropropyl trichloro-silane, γ-hexamethylene diamine base propyl-triethoxysilicane, vinyl silanes, a kind of in the vinyl trichlorosilane.
Preferably, described nano antibacterial film comprises the component of following weight portion: ldpe resin 92-97 part, and supporter 0.5-4 part of permeable watertight is contained antiseptic 0.6-5 part of nano-antibacterial composition, ethene absorbs distintegrant 0.01-1 part, coupling agent 0.01-0.5 part; Preferred, described nano antibacterial film comprises the component of following weight portion: 95 parts of ldpe resins, and 2.0 parts of the supporters of permeable watertight contain 1.7 parts of the antiseptics of nano-antibacterial composition, and ethene absorbs 0.05 part of distintegrant, 0.02 part of coupling agent.
Preferably, described nano inorganic antimicrobial agent is selected from nanometer SiO
2For silver-colored type inorganic antiseptic, the nanometer CaO of carrier is silver-colored type inorganic antiseptic, the nanometer Al of carrier
2O
3For silver-colored type inorganic antiseptic, the nano silicate of carrier is the silver-colored type inorganic antiseptic of carrier, copper type inorganic antiseptic, the nano-TiO that nano montmorillonite is carrier
2A kind of among the silver-colored type inorganic antiseptic of carrier.
Preferably, described organic antibacterial agent is selected from the quaternary ammonium salt that contains perfluoroalkyl and diallyl, 4-vinylpridine, myristyl tributyl phosphorus chloride, dodecyl tributyl phosphorus chloride, cetyl tributyl phosphorus chloride, polysiloxane quaternary ammonium, N-(2-hydroxy phenyl) benzylamine, N-(2-hydroxy phenyl) glycine, N-(2-hydroxy phenyl) valine, 3-trifluoromethyl salicylanilide, dodecyl dimethyl benzyl quaternary ammonium salt, myristyl dimethylbenzyl based quaternary ammonium salt, hexadecyldimethyl benzyl ammonium benzyl quaternary ammonium salt, a kind of among the myristyl trimethyl quaternary ammonium salt.
Preferably, described coupling agent is selected from chelating type lactic acid titanate esters, phosphate monoester, triisopropyl borate ester, γ-chloropropyl trichloro-silane, a kind of in the vinyl trichlorosilane.
The present invention also provides a kind of preparation method of special nano-antibacterial fresh-keeping film for papayas, follow these steps to carry out: the raw material that takes by weighing following weight portion: ldpe resin 90-99 part, supporter 0.1-10 part of permeable watertight, antiseptic 0.1-10 part of containing the nano-antibacterial composition, ethene absorbs distintegrant 0.01-5 part, coupling agent 0.01-5 part; Raw material was stirred 5-10 minute in the mixer high speed, and material is uniformly mixed; Then with this compound under 160-230 ℃ of temperature, extrude pawpaw special plastic master batch by mixing roll; Pawpaw special plastic master batch obtains special nano-antibacterial fresh-keeping film for papayas through the inflation film manufacturing machine blown film.
The preparation method of described special nano-antibacterial fresh-keeping film for papayas, further may further comprise the steps: described film is made pawpaw special nano-antibacterial fresh-keeping polybag, it is the special nano-antibacterial fresh-keeping film for papayas with above-mentioned acquisition, and heat pressure adhesive is made the pawpaw special nano-antibacterial fresh-keeping polybag of required specification under 150-240 ℃ of temperature.
Special nano-antibacterial fresh-keeping film for papayas of the present invention and manufacture method thereof, overcome the single deficiency of existing plastic sheeting freshness protection package effect, in ldpe resin, add the supporter of permeable watertight, the antiseptic that contains the nano-antibacterial composition, ethene absorbs distintegrant, multiple function ingredients such as coupling agent, and solved each function ingredients and used the individual event function decline problem of being brought simultaneously, provide a kind of and can regulate and control a bag interior humidity voluntarily, gaseous environment, the preservative film of microbial activities, thereby improved the subenvironment of preserving fruit and vegetable utilizing, prolonged pawpaw freshness date and preservation and effect significantly.
The specific embodiment
The invention will be further described below in conjunction with embodiment, it should be understood that these embodiment only are used for the purpose of illustration, never limit protection scope of the present invention.
| Raw material | The source |
| Ldpe resin (DJ210) | Shanghai petrochemical industry limited company |
| Nanometer SiO 2Silver-colored type inorganic antiseptic for carrier | Zhejiang Province Yuda Chemical Co., Ltd |
| Nanometer CaO is the silver-colored type inorganic antiseptic of carrier | Last Hai'an is than new chemical materials Co., Ltd |
| Nanometer Al 2O3 is the silver-colored type inorganic antiseptic of carrier | Hangzhou ten thousand scape new material Co., Ltds |
| Nano silicate is the silver-colored type inorganic antiseptic of carrier | Yellow Pu in Qinyang City, Henan Province sprays aseptic technic Co., Ltd |
| Nano montmorillonite is the copper type inorganic antiseptic of carrier | Sanding Sci. ﹠ Tech. Co., Ltd., Zhejiang |
| Nano-TiO 2Silver-colored type inorganic antiseptic for carrier | Smart Ya Nami new material Co., Ltd converges in Shanghai |
Embodiment 1
In mixer, add 1000g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), add the chelating type lactic acid titanate coupling agent of 0.2g, the average grain diameter that adds 20g again is that organic montmorillonite and the 8g average grain diameter of 50mm is the nanometer SiO of 30nm
2Be the silver-colored type inorganic antiseptic (Zhejiang Province Yuda Chemical Co., Ltd) of carrier, 10g dodecyl dimethyl benzyl quaternary ammonium salt, 0.5g potassium permanganate stirred 5 minutes; Then under 190 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 2
In mixer, add 900g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), the phosphate monoester coupling agent that adds 40g, the average grain diameter that adds 60g again is that the activated earth of 50mm and nanometer CaO that the 50g average grain diameter is 30nm are the silver-colored type inorganic antiseptic (going up Hai'an than new chemical materials Co., Ltd) of carrier, 6g dodecyl dimethyl benzyl quaternary ammonium salt, 40g potassium permanganate stirred 10 minutes; Then under 190 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 3
In mixer, add 990g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), add γ-chloropropyl trichloro-silane coupling agent of 10g, the average grain diameter that adds 1.0g again is that organic montmorillonite and the 50g average grain diameter of 50mm is the nanometer Al of 30nm
2O
3Be the silver-colored type inorganic antiseptic (Hangzhou ten thousand scape new material Co., Ltds) of carrier, 10g myristyl tributyl phosphorus chloride, the 5g potassium bichromate stirred 10 minutes; Then under 160 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 4
In mixer, add 1000g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), the triisopropyl borate ester coupling agent that adds 0.2g, the average grain diameter that adds 20g again is that the activated earth of 50mm and nano silicate that the 55g average grain diameter is 30nm are the silver-colored type inorganic antiseptic (yellow Pu in Qinyang City, Henan Province sprays aseptic technic Co., Ltd) of carrier, 25g N-(2-hydroxy phenyl) benzylamine, the 20g potassium bichromate stirred 10 minutes; Then under 160 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 5
In mixer, add 990g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), the phosphate monoester coupling agent that adds 0.2g, the average grain diameter that adds 80g again is that the organic montmorillonite of 50mm and nano montmorillonite that the 8g average grain diameter is 30nm are the copper type inorganic antiseptic (Sanding Sci. ﹠ Tech. Co., Ltd., Zhejiang) of carrier, 80g dodecyl tributyl phosphorus chloride, 5g potassium permanganate stirred 7 minutes; Then under 230 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 6
Add 900g ldpe resin (DJ210) (Shanghai petrochemical industry limited company) in mixer, add the triisopropyl borate ester coupling agent of 50g, the average grain diameter that adds 2g again is that activated earth and the 8g average grain diameter of 50mm is the nano-TiO of 30nm
2Be in the silver-colored type inorganic antiseptic of carrier (Shanghai converge smart Ya Nami new material Co., Ltd), 10g dodecyl tributyl phosphorus chloride, the 0.6g KI stirred 7 minutes; Then under 230 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 7
In mixer, add 950g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), add the vinyl trichlorosilane coupling agent of 20g, the average grain diameter that adds 4g again is that organic montmorillonite and the 5g average grain diameter of 50mm is the nano-TiO of 30nm
2Be in the silver-colored type inorganic antiseptic of carrier (Shanghai converge smart Ya Nami new material Co., Ltd), 10g N-(2-hydroxy phenyl) valine, the 10g calper calcium peroxide stirred 9 minutes; Then under 200 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 8
In mixer, add 1000g ldpe resin (DJ210) (Shanghai petrochemical industry limited company), add the vinyl trichlorosilane coupling agent of 0.2g, the average grain diameter that adds 20g again is that activated earth and the 8g average grain diameter of 50mm is the nano-TiO of 30nm
2Be in the silver-colored type inorganic antiseptic of carrier (Shanghai converge smart Ya Nami new material Co., Ltd), 10g N-(2-hydroxy phenyl) glycine, the 0.5g calper calcium peroxide stirred 9 minutes; Then under 200 ℃ of temperature by mixing roll extrusion plastic master batch; Master batch obtains the special nano-antibacterial fresh-keeping film for papayas that thickness is 0.020mm through the inflation film manufacturing machine blown film.
Embodiment 9
The special nano-antibacterial fresh-keeping film for papayas of embodiment 1-8 is made the pawpaw special nano-antibacterial fresh-keeping bag that 350mm is wide, 500mm is long with the heat seal Bag Making Machine down at 150-240 ℃.
Embodiment 10
At preservation temperature 10-12 degree, under the condition that experiment quantity is 50 kilograms, pawpaw special nano-antibacterial fresh-keeping bag of the present invention and common polythene polybag be to the preserve test result of ninety percent ripe pawpaw, see Table 1 and table 2 shown in.
Table 1 uses the fresh-keeping effect of freshness protection package of the present invention
| Time (my god) | 0 | 7 | 14 | 28 | 42 |
| Sugariness (sugariness of sucrose is 100) | 18 | 18 | 18.5 | 19 | 19 |
| Maturity changes (qualitative) | 4 Huangs (ninety percent is ripe) | / 4th Huangs, four/Three Greens | Five/Erhuang, five/Three Greens | 3/5ths Huangs, 2/5ths is green | 4/5ths Huangs, 1/5th is green |
| Mouthfeel (qualitative) | Hard slightly | Hardness is suitable, and is the niciest | Hardness is suitable, and is the niciest | Hardness is suitable, and is the niciest | Hardness is suitable, and is the niciest |
| Vitamin C (milligram/100 grams) | 90 | 90 | 90 | 83 | 80 |
Table 2 uses the fresh-keeping effect of common polythene polybag
| Time (my god) | 0 | 7 | 14 | 28 | 42 |
| Sugariness (sugariness of sucrose is 100) | 18 | 18 | 18.5 | 17 | 16 |
| Maturity changes (qualitative) | 4 Huangs (ninety percent is ripe) | 3/4ths Huangs, 1/4th is green | Complete yellow, the deliquescing of melon body, and the part stain is arranged, the part has rotten | Complete yellow, the deliquescing of melon body, and a lot of stains are arranged, major part has rotten | All rot |
| Mouthfeel (qualitative) | Hard slightly | Hardness is suitable, and is the niciest | Pulp is softer, can eat | Can not eat | Can not eat |
| Vitamin C (milligram/100 grams) | 90 | 88 | 78 | 56 | 38 |
As can be seen from Table 1, from day of pawpaw harvesting to 6 weeks, the sugariness of pawpaw not have to change substantially, i.e. not obviously increase of sugar content.To changing 4/5ths Huangs, 1/5th green, pawpaw had reached the maturity of 90%-95% to maturity when harvesting be described from 4 Huangs, and the more approaching full ripe pawpaw of such pawpaw is equally fresh.Mouthfeel is from suitable, the niciest to hardness slightly firmly a bit.The better good refreshing effect that mouthfeel becomes is described.Vit C contents has reduction slightly, but changes not quite, exceeds the fresh-keeping pawpaw Vit C contents of common freshness protection package value far away.And the same terms uses the fresh-keeping effect of common polythene polybag down, and the quality of pawpaw reduces amplitude very big (seeing Table 2).
Embodiment 11
At preservation temperature 12-14 degree, under the condition that experiment quantity is 50 kilograms, pawpaw special nano-antibacterial fresh-keeping bag of the present invention and common polythene polybag be to the preserve test result of medium well pawpaw, see Table 3 and table 4 shown in.
Table 3 uses the fresh-keeping effect of freshness protection package of the present invention
| Time (my god) | 0 | 7 | 14 | 28 | 42 |
| Sugariness (sugariness of sucrose is 100) | 17 | 17 | 17.5 | 18 | 18 |
| Maturity changes (qualitative) | 1-2 point yellow (medium well) | / 5th Huangs, 4/5ths is green | Five/Erhuang, five/Three Greens | Five/Erhuang, five/Three Greens | 3/5ths Huangs, 2/5ths is green |
| Mouthfeel (qualitative) | Hard | Hard | Hardness is suitable, and is the niciest | Hardness is suitable, and is the niciest | Hardness is suitable, and is the niciest |
| Vitamin C (milligram/100 grams) | 82 | 82 | 82 | 80 | 80 |
Table 4 uses the fresh-keeping effect of common polythene polybag
| Time (my god) | 0 | 7 | 14 | 28 | 42 |
| Sugariness (sugariness of sucrose is 100) | 17 | 17 | 17.5 | 18 | 16 |
| Maturity changes (qualitative) | 1-2 point yellow (medium well) | / 5th Huangs, 4/5ths is green | Five/Erhuang, five/Three Greens, and the part stain is arranged, the part has rotten | Five/Erhuang, five/Three Greens, and a lot of stains are arranged, the part has rotten | 3/5ths Huangs, 2/5ths is green, and a lot of stains are arranged, and the part has rotten |
| Mouthfeel (qualitative) | Hard slightly | Hard slightly, can eat | Hardness is suitable, can eat | Hardness is suitable, can eat | Hardness is suitable, can eat |
| Vitamin C (milligram/100 grams) | 82 | 82 | 80 | 80 | 68 |
Find out that from the result of the test of table 3 and table 4 freshness protection package of the present invention and common polythene freshness protection package have tangible difference to the fresh-keeping effect of pawpaw, have use value and market prospects widely as the fresh-keeping use of pawpaw freshness protection package of the present invention.
Embodiment 12
At preservation temperature 12-14 degree, under the condition that experiment quantity is 50 kilograms, the preserving fruit and vegetable utilizing polybag (B group) among pawpaw special nano-antibacterial fresh-keeping bag of the present invention (A group) and the patent CN1262592 is shown in Table 5 the preserve test comparing result of ninety percent ripe pawpaw.
The fresh-keeping contrast and experiment of table 5 freshness protection package of the present invention and control group freshness protection package
As can be seen from Table 5, from day of pawpaw harvesting to 6 weeks, the sugariness of pawpaw not have to change substantially, i.e. not obviously increase of sugar content.To changing 4/5ths Huangs, 1/5th green, pawpaw had reached the maturity of 90%-95% to maturity when harvesting be described from 4 Huangs, and the more approaching full ripe pawpaw of such pawpaw is equally fresh.Mouthfeel is from suitable, the niciest to hardness slightly firmly a bit.The better good refreshing effect that mouthfeel becomes is described.Vit C contents has reduction slightly, but changes not quite, exceeds the pawpaw Vit C contents value of control group (promptly using the preserving fruit and vegetable utilizing polybag among the patent CN1262592 to carry out fresh-keeping) far away.The same terms uses the fresh-keeping effect of control group down as can be seen, and it is very big that the quality of pawpaw reduces amplitude.The fresh-keeping effect of freshness protection package of the present invention and control group has tangible difference, as the fresh-keeping use of pawpaw freshness protection package of the present invention use value and market prospects is widely arranged.
Claims (10)
1, a kind of special nano-antibacterial fresh-keeping film for papayas, it is characterized in that described nano antibacterial film comprises the component of following weight portion: ldpe resin 90-99 part, supporter 0.1-10 part of permeable watertight, antiseptic 0.1-10 part of containing the nano-antibacterial composition, ethene absorbs distintegrant 0.01-5 part, coupling agent 0.01-5 part;
Wherein, the supporter of described permeable watertight is selected from a kind of in ultrafine inorganic powder organic montmorillonite or the activated earth;
Described ethene absorbs distintegrant and is selected from a kind of among potassium permanganate, potassium bichromate, KI, the calper calcium peroxide;
The described antiseptic that contains the nano-antibacterial composition is the mixture of the arbitrary proportion of a kind of nano inorganic antimicrobial agent and a kind of organic antibacterial agent;
Described coupling agent is selected from chelating type lactic acid titanate esters, isopropyl three (polyether-based iso-octyl pyrophosphoryl oxygen base) titanate esters, phosphate monoester, triisopropyl borate ester, γ-chloropropyl trichloro-silane, γ-hexamethylene diamine base propyl-triethoxysilicane, vinyl silanes, a kind of among the vinyl trichlorosilane.
2, special nano-antibacterial fresh-keeping film for papayas according to claim 1, it is characterized in that described nano antibacterial film comprises the component of following weight portion: ldpe resin 92-97 part, supporter 0.5-4 part of permeable watertight, antiseptic 0.6-5 part of containing the nano-antibacterial composition, ethene absorbs distintegrant 0.01-1 part, coupling agent 0.01-0.5 part.
3, special nano-antibacterial fresh-keeping film for papayas according to claim 1, it is characterized in that described nano antibacterial film comprises the component of following weight portion: 95 parts of ldpe resins, 2.0 parts of the supporters of permeable watertight, 1.7 parts of antiseptics that contain the nano-antibacterial composition, ethene absorbs 0.05 part of distintegrant, 0.02 part of coupling agent.
4, special nano-antibacterial fresh-keeping film for papayas according to claim 1, the average grain diameter that it is characterized in that described ultrafine inorganic powder organic montmorillonite or activated earth is 50mm.
5, special nano-antibacterial fresh-keeping film for papayas according to claim 1 is characterized in that described nano inorganic antimicrobial agent is selected from nanometer SiO
2Be the silver-colored type inorganic antiseptic of carrier, nanometer CaO is the silver-colored type inorganic antiseptic of carrier, nanometer Al
2O
3Be the silver-colored type inorganic antiseptic of carrier, nano silicate is the silver-colored type inorganic antiseptic of carrier, and nano montmorillonite is the copper type inorganic antiseptic of carrier, nano-TiO
2A kind of among the silver-colored type inorganic antiseptic of carrier.
6, special nano-antibacterial fresh-keeping film for papayas according to claim 1, it is characterized in that described organic antibacterial agent is selected from the quaternary ammonium salt that contains perfluoroalkyl and diallyl, 4-vinylpridine, myristyl tributyl phosphorus chloride, dodecyl tributyl phosphorus chloride, cetyl tributyl phosphorus chloride, polysiloxane quaternary ammonium, N-(2-hydroxy phenyl) benzylamine, N-(2-hydroxy phenyl) glycine, N-(2-hydroxy phenyl) valine, 3-trifluoromethyl salicylanilide, dodecyl dimethyl benzyl quaternary ammonium salt, myristyl dimethylbenzyl based quaternary ammonium salt, hexadecyldimethyl benzyl ammonium benzyl quaternary ammonium salt, a kind of among the myristyl trimethyl quaternary ammonium salt.
7, special nano-antibacterial fresh-keeping film for papayas according to claim 1 is characterized in that the weight ratio of nano inorganic antimicrobial agent and organic antibacterial agent is 1:10-10:1 in the mixture of the described antiseptic that contains the nano-antibacterial composition.
8, special nano-antibacterial fresh-keeping film for papayas according to claim 1 is characterized in that described coupling agent is selected from chelating type lactic acid titanate esters, phosphate monoester, triisopropyl borate ester, γ-chloropropyl trichloro-silane, a kind of among the vinyl trichlorosilane.
9, a kind of preparation method of special nano-antibacterial fresh-keeping film for papayas is characterized in that following these steps to carrying out:
Raw material with following weight portion: ldpe resin 90-99 part, supporter 0.1-10 part of permeable watertight, antiseptic 0.1-10 part of containing the nano-antibacterial composition, ethene absorbs distintegrant 0.01-5 part, coupling agent 0.01-5 part was stirred 5-10 minute in the mixer high speed, and material is uniformly mixed; Then with this compound under 160-230 ℃ of temperature, extrude pawpaw special plastic master batch by mixing roll; Pawpaw special plastic master batch obtains special nano-antibacterial fresh-keeping film for papayas through the inflation film manufacturing machine blown film.
10, the preparation method of pawpaw special plastic antistaling film according to claim 9, it is characterized in that further comprising: under 150-240 ℃ of temperature, heat pressure adhesive is made the pawpaw special plastic fresh-keeping plastic bag of required specification with described pawpaw special plastic antistaling film.
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| CN103613946A (en) * | 2013-11-08 | 2014-03-05 | 苏州新颖新材料科技股份有限公司 | Method for preparing antibacterial thin film from waste plastics |
| CN104788785A (en) * | 2015-04-20 | 2015-07-22 | 浙江一帆日用品有限公司 | Environment-friendly antibacterial fresh-keeping bag |
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| CN1124312C (en) * | 2001-02-27 | 2003-10-15 | 国家农产品保鲜工程技术研究中心（天津） | Freshness-retaining film added with nano material and making method thereof |
| CN1262592C (en) * | 2002-07-08 | 2006-07-05 | 北京崇高纳米科技有限公司 | Fruit and vegetable fresh-keeping plastic film and method for making the same |
| CN1539874A (en) * | 2003-04-22 | 2004-10-27 | 陈建强 | Antibacterial, keeping foodstuff fresh, uvioresistant plastic fabricated from Nano material |
| CN101313698A (en) * | 2008-07-04 | 2008-12-03 | 四川省食品发酵工业研究设计院 | Nano-antimicrobial preservative film for fruits and vegetables |
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2009
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| CN101884348A (en) * | 2010-07-14 | 2010-11-17 | 广东省农业科学院果树研究所 | Coating material of fresh-cut papaw and refreshing method thereof |
| CN101884348B (en) * | 2010-07-14 | 2012-11-07 | 广东省农业科学院果树研究所 | Coating material of fresh-cut papaw and refreshing method thereof |
| CN103613946A (en) * | 2013-11-08 | 2014-03-05 | 苏州新颖新材料科技股份有限公司 | Method for preparing antibacterial thin film from waste plastics |
| CN104788785A (en) * | 2015-04-20 | 2015-07-22 | 浙江一帆日用品有限公司 | Environment-friendly antibacterial fresh-keeping bag |
| CN106189188A (en) * | 2016-08-04 | 2016-12-07 | 许勤峰 | A kind of PU leathering layer composition |
| CN107164961A (en) * | 2017-06-23 | 2017-09-15 | 华娜 | A kind of antibacterial finishing agent used for textiles and its production and use |
| CN109054145A (en) * | 2018-06-07 | 2018-12-21 | 江阴通利光电科技有限公司 | A kind of antibacterial polyethylene food package film and preparation method thereof |
| CN109054145B (en) * | 2018-06-07 | 2021-04-20 | 江阴通利光电科技有限公司 | Antibacterial polyethylene food packaging film and preparation method thereof |
| CN110195516A (en) * | 2019-05-07 | 2019-09-03 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of three-dimensional concrete heat-insulating moisturizing elastic composite curing film |
| CN112220310A (en) * | 2020-10-20 | 2021-01-15 | 温州欧迪镜业有限公司 | Mirror and processing technology thereof |
| CN112220310B (en) * | 2020-10-20 | 2022-05-10 | 温州欧迪镜业有限公司 | Mirror and processing technology thereof |
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